Nozzle, oral irrigator and forming method for nozzle

Abstract

A nozzle (100), an oral irrigator (1000), and a forming method for the nozzle (100). The nozzle (100) is applied to the oral irrigator (1000), and comprises a spray rod (10) and a spray head (20), wherein the spray rod (10) extends in a first direction (AA); the spray head (20) comprises a main flow portion (21), a first side portion (22) and a second side portion (23), the main flow portion (21) being connected to the spray rod (10), the first side portion (22) extending in a second direction (BB) from one end of the main flow portion (21), the second side portion (23) extending in the second direction (BB) from the other end of the main flow portion (21), the second side portion (23) and the first side portion (22) being spaced apart and being arranged opposite each other in the first direction (AA), such that the main flow portion (21), the first side portion (22) and the second side portion (23) form an accommodating cavity (24) for accommodating teeth, and the second direction (BB) being perpendicular to the first direction (AA); and the main flow portion (21) is provided with a deformation section (2152), and at least the deformation section (2152) is an elastic member.

Description

Nozzle, oral irrigator, and nozzle forming method Technical Field

[0001] The present application relates to the field of oral cleaning technology, and in particular to a nozzle, an oral irrigator, and a nozzle molding method. Background Art

[0002] An oral irrigator is a tool that uses a pulsed water flow to clean teeth and the spaces between teeth. In related technologies, a U-shaped nozzle can be used to clamp and clean the inner and outer surfaces of teeth. However, due to the varying thickness of teeth, thicker teeth can make it difficult for the U-shaped nozzle to move around in the mouth, causing it to become stuck.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a nozzle, an oral irrigator, and a nozzle molding method, which are intended to prevent the nozzle from getting stuck in the teeth.

[0005] According to a first aspect of an embodiment of the present application, there is provided a nozzle for use in a water flosser, the nozzle comprising a spray rod and a nozzle head; the spray rod extends along a first direction and has a spray rod flow channel therein, the nozzle head comprising a main flow portion, a first side portion and a second side portion; the main flow portion is connected to the spray rod and has a main flow channel that flows with the spray rod flow channel; the first side portion extends from one end of the main flow portion along a second direction and has a first flow channel that is connected to the main flow channel, the first side portion has a first inner side surface, the first flow channel has a first nozzle formed on the first inner side surface, wherein the second direction is perpendicular to the first direction; the first side portion Two side portions extend from the other end of the main flow portion along the second direction, and have a second flow channel connected to the main flow channel. The second side portion is spaced apart from the first side portion and arranged opposite to each other along the first direction, so that the main flow portion, the first side portion and the second side portion constitute an accommodating cavity for accommodating teeth, the second side portion has a second inner side surface arranged opposite to the first inner side surface along the first direction, and the second flow channel forms a second nozzle on the second inner side surface; wherein a deformation section is provided on the main flow portion, and at least the deformation section is an elastic member, so that the nozzle can move relative to the spray rod.

[0006] Furthermore, at least a portion of the nozzle is an elastic member, the nozzle is an integrated structure, and the main flow portion is connected to the spray rod and formed into an integrated structure.

[0007] Furthermore, the main stream portion and the spray bar are arranged in one of the following ways: way 1: the central axis of the main stream portion is arranged to coincide with the central axis of the spray bar; way 2: the central axis of the main stream portion is arranged perpendicular to the central axis of the spray bar.

[0008] Furthermore, when the central axis of the main flow portion is arranged to coincide with the central axis of the spray bar, the cross-sectional area of ​​the main flow channel is smaller than the cross-sectional area of ​​the spray bar flow channel.

[0009] Further, when the central axis of the main flow portion is arranged to coincide with the central axis of the spray boom, the main flow portion includes a flow channel portion and a connecting portion, the flow channel portion is respectively connected to the first side portion and the second side portion, the connecting portion is respectively connected to the flow channel portion and the spray boom, the flow channel portion and the connecting portion are arranged along the extension direction of the main flow portion, and the main flow passes through the flow channel portion and the connecting portion.

[0010] Furthermore, the connecting portion is provided with the deformation section at the end away from the spray rod.

[0011] Furthermore, the deformation ability of the deformation segment in the second direction is smaller than the deformation ability of the deformation segment in the third direction, or the thickness of the deformation segment in the second direction is greater than the thickness of the deformation segment in the third direction, wherein the third direction is perpendicular to the first direction and the second direction.

[0012] Furthermore, a material reduction groove is provided on the outer surface of the deformation section to make the deformation section easy to deform. The material reduction groove is provided on the outer surface of the connecting portion which is relatively arranged along the third direction. The third direction, the first direction and the second direction are perpendicular to each other. The material reduction groove extends along the second direction, and / or the material reduction groove extends obliquely in a direction away from the spray rod.

[0013] Furthermore, a material reduction groove is provided on the outer surface of the deformation section, and the width of the material reduction groove in the first direction is smaller than the diameter of the deformation section.

[0014] Furthermore, a material reducing groove is provided on the outer surface of the deformation section, and the material reducing groove extends obliquely in a direction away from the spray bar in a direction away from the second direction from the inside of the flow channel portion.

[0015] Furthermore, a material reducing groove is provided on the outer surface of the deformation section. Along the first direction, a plurality of the material reducing grooves are arranged at intervals on the deformation section, and the spacing between adjacent material reducing grooves is no more than 2.5 mm.

[0016] Furthermore, a material reduction groove is provided on the outer surface of the deformation section, and the main channel is provided in the deformation section. Along the third direction, the inner wall surface of the main channel and the bottom of the material reduction groove have a first thickness, and the first thickness is not less than 0.5 mm and not more than 0.9 mm. The third direction is perpendicular to the first direction and the second direction.

[0017] Furthermore, along the first direction, the length of the deformation segment is not less than 3.5 mm and not more than 15 mm, or the diameter of the deformation segment is not less than 1.2 mm, or the hardness of the deformation segment is not more than 40 Shore hardness and less than or equal to 70 Shore hardness.

[0018] Furthermore, the deformation section has the main flow channel, and the inner wall surface of the main flow channel and the outer surface of the deformation section have a second thickness, and the second thickness is not less than 1 mm and not more than 3 mm.

[0019] Furthermore, the nozzle is an elastic part and satisfies at least one of the following conditions: along the first direction, the overall length formed by the first side portion, the second side portion and the flow channel portion is greater than the diameter of the deformation section; along the second direction, the overall height formed by the first side portion, the second side portion and the flow channel portion is greater than the diameter of the deformation section; along the third direction, the overall width formed by the first side portion, the second side portion and the flow channel portion is greater than the diameter of the deformation section, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0020] Furthermore, the flow channel portion and the connecting portion are both soft rubber parts and are molded separately. The flow channel portion includes a first sub-portion and a second sub-portion. The first sub-portion and the connecting portion are integrally molded, and the second sub-portion is integrally molded with the first side portion and the second side portion, and is assembled and fixed with the first sub-portion to jointly construct the diversion channel, and the diversion channel is connected to the first flow channel and the second flow channel.

[0021] Furthermore, the first sub-part includes an annular protrusion, and the second sub-part has an annular mounting groove, and the annular protrusion is clamped in the annular mounting groove.

[0022] Furthermore, the first sub-part includes an annular protrusion, and the second sub-part has an annular mounting groove, and the annular protrusion is clamped in the annular mounting groove; the bottom of the annular mounting groove has a glue filling groove, and the glue filling groove is provided with glue, and the glue is bonded to the groove wall of the glue filling groove and the first sub-part.

[0023] Furthermore, the second side portion has a first outer surface disposed toward the deformation section. Along the second direction, there is a first distance between the first outer surface and the outer surface of the deformation section. The first distance is not less than 1.2 mm and not more than 2 mm.

[0024] Furthermore, a sleeve hole is provided at one end of the connection portion facing the spray rod, the sleeve hole is communicated with the main channel, the spray rod is inserted into the sleeve hole, and the spray rod is sealed with the inner wall of the sleeve hole.

[0025] Furthermore, a first stop step is provided on the inner wall of the sleeve hole, and a second stop step is provided on the outer peripheral surface of the spray rod, and the first stop step and the second stop step abut against each other.

[0026] Furthermore, the main flow portion has a transition inner surface and a transition outer surface relatively arranged, and the transition inner surface is connected to the first inner side surface and the second inner side surface; in the third direction, the size of the flow channel portion is larger than the size of the connecting portion, and the connecting portion and the transition outer surface are connected and transition in an arc shape, and the third direction is perpendicular to the first direction and the second direction.

[0027] Further, along the second direction, the first side portion has a first length relative to the main flow portion, and the second side portion has a second length relative to the main flow portion; wherein the first length is smaller than the second length.

[0028] Furthermore, the nozzle is an elastic member, the first side portion and the second side portion are spaced apart along the first direction, and the first side portion is farther away from the spray rod than the second side portion, the first side portion is used to clean the inner tooth surface, and the second side portion is used to clean the outer tooth surface.

[0029] Further, the first side portion has a third thickness in the first direction, the second side portion has a fourth thickness in the first direction, and the third thickness is smaller than the fourth thickness; and / or, along the third direction, the first side portion has a first width, the second side portion has a second width, and the first width is smaller than the second width, wherein the third direction is perpendicular to the first direction and the second direction.

[0030] Further, the first side portion has a third thickness in the first direction, the second side portion has a fourth thickness in the first direction, and the third thickness and the fourth thickness gradually decrease along the second direction and in a direction away from the main flow portion; and / or, along the third direction, the first side portion has a first width, the second side portion has a second width, the first width and the second width gradually decrease along the second direction and in a direction away from the main flow portion, wherein the third direction is perpendicular to the first direction and the second direction.

[0031] Furthermore, the width of at least the end portion of the first side portion gradually decreases in a direction away from the main flow portion, and the width of at least the end portion of the second side portion gradually decreases in a direction away from the main flow portion.

[0032] Furthermore, in a direction from the connecting end to the free end of the first side portion, the cross-sectional area of ​​at least the end portion of the first side portion in the third direction gradually decreases; in a direction from the connecting end to the free end of the second side portion, the cross-sectional area of ​​at least the end portion of the second side portion in the third direction gradually decreases; and / or, the cross-sectional area of ​​the first side portion in the third direction gradually decreases, and the cross-sectional area of ​​the second side portion in the third direction gradually decreases, wherein the third direction is perpendicular to both the first direction and the second direction.

[0033] Further, the free end of the first side portion is bent and extended toward the second side portion, and the free end of the second side portion is bent and extended toward the first side portion.

[0034] Furthermore, the ratio of the cross-sectional area of ​​the free end of the first side portion in the third direction to the cross-sectional area of ​​the connecting end of the first side portion in the third direction is less than 1 / 3; the ratio of the cross-sectional area of ​​the free end of the second side portion in the third direction to the cross-sectional area of ​​the connecting end of the second side portion in the third direction is less than 1 / 3, wherein the third direction is perpendicular to the first direction and the second direction.

[0035] Furthermore, the free end of the first side portion gradually converges in a direction away from the main flow portion; and the free end of the second side portion gradually converges in a direction away from the main flow portion.

[0036] Further, the portion of the first side portion close to the mainstream portion is perpendicular to the mainstream portion, and the portion of the first side portion away from the mainstream portion is bent toward the second side portion; the portion of the second side portion close to the mainstream portion is perpendicular to the mainstream portion, and the portion of the second side portion away from the mainstream portion is bent toward the first side portion.

[0037] Furthermore, the first nozzle and the second nozzle are not arranged directly opposite each other in the first direction, and the first nozzle is arranged close to the free end of the first side portion, and the second nozzle is arranged close to the free end of the second side portion.

[0038] Furthermore, the nozzle is a soft rubber part and is projected along the first direction. The projection of the first nozzle and the projection of the second nozzle are spaced apart in the second direction, and the first nozzle is arranged close to the free end of the first side portion, and in the second direction, the second nozzle is arranged closer to the middle of the second inner side surface than the first nozzle.

[0039] Furthermore, the spray bar flow channel has a water outlet for communicating with the main channel, and in the first direction, the water outlet is closer to the second side than the first side, so that the distance from the water outlet to the first nozzle is equal to the distance from the water outlet to the second nozzle.

[0040] Furthermore, when projected along the first direction, the projection of the first nozzle and the projection of the second nozzle are spaced apart, and the distance between the projection of the first nozzle and the projection of the second nozzle is less than or equal to 3 mm.

[0041] Furthermore, the difference between the first length and the second length is greater than or equal to 2 mm and less than or equal to 12 mm.

[0042] Furthermore, the first length and the second length are both less than or equal to 8 mm; or, the first length is less than or equal to 6 mm and greater than or equal to 3 mm.

[0043] Furthermore, the total thickness of the nozzle and the spray bar in the second direction is a fifth thickness, and the fifth thickness is not greater than 20 mm.

[0044] Furthermore, the first nozzle faces the accommodating cavity, and the central axis of the first nozzle is set at an angle to the first direction and the second direction; and / or the second nozzle faces the accommodating cavity, and the central axis of the second nozzle is set at an angle to the first direction and the second direction.

[0045] Furthermore, a center dividing plane of the first side portion is coplanar with a center dividing plane of the second side portion, wherein a center axis of the first nozzle and a center axis of the second nozzle are both parallel to the center dividing plane.

[0046] Furthermore, the central axis of the first nozzle has a first angle with the second direction, and the central axis of the second nozzle has a second angle with the second direction, and the first angle is less than or equal to the second angle, so that the intersection of the central axis of the first nozzle and the central axis of the second nozzle is closer to the second side.

[0047] Furthermore, the central axis of the first nozzle has a first angle with the second direction, the central axis of the second nozzle has a second angle with the second direction, the first angle is less than or equal to the second angle, and the first angle and the second angle are both greater than or equal to 45 degrees and less than or equal to 90 degrees.

[0048] Furthermore, the spray bar has a first axis along the first direction, and a plurality of connecting lines are provided between the first nozzle and the second nozzle, and at least one of the connecting lines is in the same plane as the first axis.

[0049] Furthermore, the first nozzle and the second nozzle are arranged opposite to each other in the first direction or staggered in the second direction.

[0050] Furthermore, the first nozzle and the second nozzle are both arranged toward the accommodating cavity, and along the first direction, the first nozzle and the second nozzle are not arranged directly opposite each other.

[0051] Furthermore, when projected along the first direction, the projection of the first nozzle and the projection of the second nozzle at least partially do not overlap in the second direction.

[0052] Further, the projection of the first nozzle and the projection of the second nozzle are spaced apart in the second direction, or the projection of the first nozzle and the projection of the second nozzle are spaced apart in the second direction, and the distance between the projection of the first nozzle and the projection of the second nozzle in the second direction is less than or equal to 5 mm.

[0053] Furthermore, when projected along the first direction, the projection of the first nozzle and the projection of the second nozzle at least partially do not overlap in a third direction, wherein the third direction is perpendicular to the first direction and the second direction.

[0054] Further, the projection of the first nozzle and the projection of the second nozzle are spaced apart in the third direction; or, the projection of the first nozzle and the projection of the second nozzle are spaced apart in the third direction, and the distance between the projection of the first nozzle and the projection of the second nozzle in the third direction is less than or equal to 5 mm.

[0055] Further, the center dividing surface of the first side portion is coplanar with the center dividing surface of the second side portion, so that the first side portion and the second side portion are arranged opposite each other, or, along the first direction, the first side portion and the second side portion are not arranged opposite each other, and the first nozzle is arranged at the middle of the first inner surface in the third direction, and the second nozzle is arranged at the middle of the second inner surface in the third direction.

[0056] Furthermore, when projected along the first direction, the projection of the first nozzle and the projection of the second nozzle do not at least partially overlap in the second direction and the third direction, and the projection of the first nozzle and the projection of the second nozzle are spaced apart in the second direction and the third direction, wherein the third direction is perpendicular to the first direction and the second direction in pairs.

[0057] Furthermore, the nozzle is an elastic member, and along the second direction, the ratio of the distance between the first nozzle and the main flow portion to the first length is greater than 2 / 3, and the ratio of the distance between the second nozzle and the main flow portion to the second length is greater than 2 / 3.

[0058] Furthermore, the aperture of the first nozzle and the aperture of the second nozzle are both greater than or equal to 0.4 mm and less than or equal to 0.7 mm.

[0059] Further, along the second direction, the first side portion has a first length relative to the main flow portion, and the second side portion has a second length relative to the main flow portion; the main flow portion has a transition inner surface and a transition outer surface that are relatively arranged, and the transition inner surface is connected to the first inner side surface and the second inner side surface, wherein the ratio of the distance from the first nozzle to the transition inner surface to the first length is not less than 0.7 mm and less than 1 mm; or, the ratio of the distance from the second nozzle to the transition inner surface to the second length is not less than 0.7 mm and less than 1 mm; or, the distance between the transition inner surface and the first nozzle and the second nozzle in the second direction is not less than 3 mm.

[0060] Further, the first side portion has a third thickness in the first direction, the second side portion has a fourth thickness in the first direction, the main portion has a sixth thickness in the second direction, the ratio of the sixth thickness to the third thickness is not less than 2 and not greater than 5, and / or the ratio of the sixth thickness to the fourth thickness is not less than 2 and not greater than 5.

[0061] Further, the first side portion has a third thickness in the first direction, the second side portion has a fourth thickness in the first direction, the main portion has a sixth thickness in the second direction, and at least one of the third thickness and the fourth thickness is smaller than the sixth thickness; and / or, the main portion has a sixth thickness in the second direction, and the sixth thickness is not less than 8 mm and not greater than 14 mm.

[0062] Furthermore, the nozzle is constructed in at least one of the following ways: Way 1: the cross-sectional area of ​​the first flow channel gradually decreases and / or remains unchanged in the direction away from the main flow channel; Way 2: the cross-sectional area of ​​the second flow channel gradually decreases and / or remains unchanged in the direction away from the main flow channel; Way 3: the cross-sectional area of ​​the main flow channel gradually decreases and / or remains unchanged in the direction away from the spray rod.

[0063] Further, the first flow channel includes a first flow guide channel and a first outlet flow channel, the first flow guide channel extends along the second direction, one end of the first outlet flow channel is connected to the first flow guide channel, and the other end of the first outlet flow channel is passed through the first inner side surface; the second flow channel includes a second flow guide channel and a second outlet flow channel, the second flow guide channel extends along the second direction, one end of the second outlet flow channel is connected to the second flow guide channel, and the other end of the second outlet flow channel is passed through the second inner side surface.

[0064] Furthermore, a first protrusion is provided on the first inner side surface, and the first outlet flow channel is provided through the first protrusion; a second protrusion is provided on the second inner side surface, and the second outlet flow channel is provided through the second protrusion.

[0065] Furthermore, the first outlet flow channel includes a first collecting section, a first transition section and a first pressure reducing section, and the first collecting section, the first transition section and the first pressure reducing section are arranged in sequence from the inside to the outside along the extension direction of the first outlet flow channel, and the cross-sectional area of ​​the first collecting section and the cross-sectional area of ​​the first pressure reducing section are both larger than the cross-sectional area of ​​the first transition section; the second outlet flow channel includes a second collecting section, a second transition section and a second pressure reducing section, and the second collecting section, the second transition section and the second pressure reducing section are arranged in sequence from the inside to the outside along the extension direction of the second outlet flow channel, and the cross-sectional area of ​​the second collecting section and the cross-sectional area of ​​the second pressure reducing section are both larger than the cross-sectional area of ​​the second transition section.

[0066] Furthermore, the cross-sectional area of ​​the first current collecting section gradually decreases from the inside to the outside; and the cross-sectional area of ​​the second current collecting section gradually decreases from the inside to the outside.

[0067] Furthermore, the first outlet channel is located between the two ends of the first guide channel and close to the end of the first guide channel away from the main channel; the second outlet channel is located between the two ends of the second guide channel and close to the end of the second guide channel away from the main channel.

[0068] Furthermore, the wall thickness of the main channel is not less than 1.5 mm.

[0069] Furthermore, the main flow portion has a transition inner surface and a transition outer surface arranged opposite to each other, the transition inner surface is connected to the first inner side surface and the second inner side surface; one of the end surface of one end of the main flow portion and the transition outer surface is open and connected to the spray rod, and the other is closed.

[0070] Furthermore, the main flow portion has a transition inner surface and a transition outer surface that are relatively arranged, the transition inner surface is connected to the first inner side surface and the second inner side surface, the transition outer surface is provided with a process port, the process port is connected to the main flow channel, and one end of the first flow channel facing the process port and one end of the second flow channel facing the process port are both arranged corresponding to the position of the process port; the nozzle also includes a sealing portion, and the sealing portion and the main flow portion are constructed as an integrated structure for sealing the process port.

[0071] Furthermore, the covering part is one of an elastic part and a hard part; or, the cross-sectional area of ​​the process port gradually increases or remains unchanged in the direction away from the main channel; or, the main channel, the first side part and the second side part are formed into an integral structure by one injection molding, and the main channel and the covering part are formed into an integral structure by a second injection molding.

[0072] Furthermore, the main flow portion and the spray bar are formed into an integral structure; or, the nozzle further includes a rigid connector, the rigid connector and the main flow portion are formed into an integral structure, and the rigid connector is connected to the spray bar.

[0073] Furthermore, the nozzle is constructed in at least one of the following ways: Way 1: from the center of the first side portion in the width direction to the edge thereof in the width direction, the thickness of the first side portion gradually decreases and / or remains unchanged; Way 2: from the center of the second flow portion in the width direction to the edge thereof in the width direction, the thickness of the second side portion gradually decreases and / or remains unchanged; Way 3: from the center of the mainstream portion in the width direction to the edge thereof in the width direction, the thickness of the mainstream portion gradually decreases and / or remains unchanged.

[0074] Furthermore, the spray bar flow channel has a water outlet for communicating with the main flow channel, and the axis of the water outlet passes through the middle of the extension direction of the main flow channel.

[0075] Furthermore, the main flow portion has a transition inner surface and a transition outer surface arranged opposite to each other, the transition inner surface is connected to the first inner side surface and the second inner side surface, the first side portion has a first outer side surface opposite to the first inner side surface, and the second side portion has a second outer side surface opposite to the second inner side surface; the first inner side surface, the transition inner surface and the second inner side surface are smoothly transitionally connected in sequence; and / or the first outer side surface, the transition outer surface and the second outer side surface are smoothly transitionally connected in sequence.

[0076] Furthermore, the nozzle is an elastic member, and along the first direction, a distance between the first inner side surface and the second inner side surface is greater than or equal to 8 mm and less than or equal to 14 mm.

[0077] Furthermore, the spray rod includes a plug-in part and a transmission part, the transmission part is connected to the plug-in part, and the end of the transmission part away from the plug-in part is connected to the mainstream part; the mainstream part extends along a fourth direction, and the plug-in part extends along the first direction, and the angle between the fourth direction and the first direction is not less than 0 degrees and not more than 30 degrees.

[0078] Furthermore, the main flow portion is at least partially an elastic part, and the main flow portion has a transition inner surface and a transition outer surface that are relatively arranged, the transition inner surface is connected to the first inner side surface and the second inner side surface, and the transition outer surface is connected to the transmission portion, and the transmission portion has a midplane P along the first direction, the spray rod is symmetrical about the midplane P, the nozzle has a midplane Q along the fourth direction, the nozzle is symmetrical about the midplane Q, and the distance between the midplane P and the midplane Q and the cross section of the nozzle is not less than 0 mm and not more than 2 mm.

[0079] Further, the plug-in portion extends along a straight line, the transmission portion extends along an arc, the plug-in portion is symmetrical about the mid-plane P, and the transmission portion is symmetrical about the mid-plane P; or, the plug-in portion extends along a straight line, the transmission portion extends along a straight line, the plug-in portion is symmetrical about the mid-plane P, and the transmission portion is symmetrical about the mid-plane P; or, the plug-in portion extends along a straight line, and the transmission portion is composed of multiple sections connected at angles to each other along the extension direction of the mid-plane P, so that the spray boom fold line extends.

[0080] Further, when the central axis of the main stream portion is arranged to coincide with the central axis of the spray rod, the main stream portion includes a flow channel portion and a connecting portion, the flow channel portion is connected to the first side portion and the second side portion respectively, the connecting portion is connected to the flow channel portion and the spray rod respectively, the flow channel portion and the connecting portion are arranged along the extension direction of the main stream portion, and the main stream passes through the flow channel portion and the connecting portion, and the connecting portion is provided with a deformation section at the end away from the spray rod, and the outer surface of the deformation section is provided with a material reduction groove, wherein a plurality of the material reduction grooves are symmetrically distributed about the midplane P, and / or any side of the midplane P includes at least two of the material reduction grooves, and at least two of the material reduction grooves on any side are arranged at intervals in the first direction.

[0081] A second aspect of an embodiment of the present application provides a water flosser, comprising a main body and the nozzle of any one of the above items, wherein one end of the spray rod away from the main flow portion is connected to the main body and the spray rod is in communication with the main body.

[0082] A third aspect of an embodiment of the present application provides a method for forming a nozzle, including forming at least a portion of a main flow portion, a first side portion, and a second side portion of a nozzle, wherein the main flow portion, the first side portion, and the second side portion are constructed as an integrated structure, the first side portion and the second side portion are arranged at intervals along the extension direction of the main flow portion and are located on the same side of the main flow portion, a main flow channel is formed in the main flow portion, a first flow channel is formed in the first side portion, and a second flow channel is formed in the second side portion, and the main flow channel is connected to the first flow channel and the second flow channel, respectively; and a spray rod is formed, and the spray rod is connected to the main flow portion.

[0083] Furthermore, the main flow portion has a transition inner surface and a transition outer surface arranged opposite to each other, and the transition inner surface is connected to the first side portion and the second side portion; the molding of at least a portion of the main flow portion of the nozzle, the first side portion and the second side portion includes: molding a portion of the main flow portion, the first side portion and the second side portion, molding a process port on the end surface of one end of the main flow portion and one of the transition outer surfaces, and molding a socket hole on the other end surface of one end of the main flow portion and the transition outer surface; molding a sealing portion, the sealing portion and the portion of the main flow portion are constructed as an integrated structure for sealing the process port, and inserting the spray rod into the socket hole.

[0084] Furthermore, the main flow portion has a transition inner surface and a transition outer surface that are relatively arranged, and the transition inner surface is connected to the first side portion and the second side portion; the molding of at least a part of the main flow portion of the nozzle, the first side portion and the second side portion includes: molding a part of the main flow portion, the first side portion and the second side portion, a process port is provided on the transition outer surface, the process port is connected to the main flow channel, one end of the first flow channel facing the process port and one end of the second branch flow channel facing the process port are both arranged corresponding to the position of the process port, and a socket hole is molded at one end of the main flow portion; a sealing portion is molded on the transition outer surface, the sealing portion and the part of the main flow portion are constructed as an integrated structure for sealing the process port, and the spray rod is inserted into the socket hole.

[0085] Furthermore, before forming the sealing portion outside the transition, the method further includes: inserting a needle-shaped module into the main channel, with both ends of the needle-shaped module exceeding the edge of the process port in the extension direction of the main channel, and the needle-shaped module sealingly fitting with the inner wall of the main channel.

[0086] Furthermore, the main flow portion has a transition inner surface and a transition outer surface arranged relative to each other, and the transition inner surface is connected to the first side portion and the second side portion; the molding of at least a portion of the main flow portion of the nozzle, the first side portion and the second side portion includes: molding a portion of the main flow portion, the first side portion and the second side portion, the end surface of one end of the main flow portion is provided with a process port, the process port is connected to the main channel, and a socket hole is molded on the transition outer surface; a sealing portion is molded on the end surface of the one end of the main flow portion, and the sealing portion and the portion of the main flow portion are constructed as an integrated structure for sealing the process port and inserting the spray rod into the socket hole.

[0087] Further, the spray bar is formed and connected to the main flow portion, including: before forming at least a portion of the main flow portion, the first side portion and the second side portion of the nozzle, the spray bar is formed, the main flow portion is formed on the spray bar, and the spray bar and the main flow portion are formed into an integral structure; or after forming at least a portion of the main flow portion, the first side portion and the second side portion of the nozzle, the spray bar is formed on the main flow portion, and the spray bar and the main flow portion are formed into an integral structure.

[0088] Furthermore, forming the main flow portion on the spray boom includes: inserting a needle-shaped module into the spray boom flow channel of the spray boom, with both ends of the needle-shaped module extending beyond both ends of the spray boom; forming the main flow portion on the spray boom, with a portion of the needle-shaped module inserted into the main flow channel; and pulling out the needle-shaped module to connect the main flow channel with the spray boom flow channel.

[0089] Furthermore, the spray bar is formed on the main flow section, comprising: inserting a needle-shaped module into the main flow channel, with one end of the needle-shaped module extending beyond the main flow section; forming the spray bar on the main flow section, with a portion of the needle-shaped module inserted into the spray bar flow channel; and pulling out the needle-shaped module to connect the main flow channel and the spray bar flow channel.

[0090] An embodiment of the present application provides a nozzle, an oral irrigator, and a method for forming a nozzle. The nozzle is applied to the oral irrigator, and the nozzle includes a main portion, a first side portion, and a second side portion. A deformation section is provided on the main portion, and at least the deformation section is an elastic member. The user can deform the deformation section by twisting the spray rod to adjust the position of the nozzle on the teeth. This is not only beneficial for comprehensive cleaning of the teeth in the oral cavity and improving the cleaning effect of the nozzle on the teeth, but the deformation of the deformation section can also change the distance, angle, and clamping force between the first side portion and the second side portion and the teeth, thereby changing the position of the first nozzle and the second nozzle relative to the spray rod, making it easier to remove the nozzle from the oral cavity, thereby reducing the possibility of the nozzle being stuck on the teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] FIG1 is a schematic structural diagram of a water flosser in one embodiment of the present application;

[0092] FIG2 is a schematic diagram of the exploded structure of a nozzle in one embodiment of the present application;

[0093] FIG3 is a schematic structural diagram of a nozzle in an embodiment of the present application;

[0094] FIG4 is a schematic structural diagram of a nozzle from another perspective in an embodiment of the present application;

[0095] FIG5 is a schematic cross-sectional structural diagram of the nozzle shown in FIG4 along the EE section;

[0096] FIG6 is a schematic structural diagram of a nozzle in an embodiment of the present application;

[0097] FIG7 is a schematic diagram of a partial structure of a nozzle in one embodiment of the present application;

[0098] FIG8 is a schematic diagram of the structure of a nozzle in one embodiment of the present application;

[0099] FIG9 is a second structural diagram of a nozzle in an embodiment of the present application;

[0100] FIG10 is a third structural diagram of a nozzle in an embodiment of the present application;

[0101] FIG11 is a schematic diagram of the structure of a nozzle in one embodiment of the present invention;

[0102] FIG12 is a cross-sectional view of a nozzle in one embodiment of the present invention;

[0103] FIG13 is a partial enlarged view of the F area in FIG12;

[0104] FIG14 is a partial enlarged view of the G area in FIG12;

[0105] FIG15 is an exploded view of a nozzle in one embodiment of the present application;

[0106] FIG16 is a schematic diagram of another part of the structure of the nozzle in one embodiment of the present application;

[0107] FIG17 is a schematic cross-sectional view of another portion of the nozzle shown in FIG16 along section II;

[0108] FIG18 is a schematic structural diagram of a portion of the nozzle in one embodiment of the present application from another perspective;

[0109] FIG19 is a schematic cross-sectional view of a portion of the nozzle shown in FIG18 along the JJ cross section;

[0110] FIG20 is a schematic structural diagram of a portion of the nozzle structure in an embodiment of the present application from another perspective;

[0111] FIG21 is a schematic cross-sectional view of a portion of the nozzle shown in FIG20 along the KK cross section;

[0112] FIG22 is a schematic structural diagram of a nozzle from another perspective in an embodiment of the present application;

[0113] FIG23 is a schematic cross-sectional structural diagram of the nozzle shown in FIG22 along the MM section;

[0114] FIG24 is a second schematic diagram of the structure of the nozzle in one embodiment of the present application

[0115] FIG25 is a third structural diagram of a nozzle in an embodiment of the present application;

[0116] FIG26 is a fourth structural diagram of a nozzle in an embodiment of the present application;

[0117] FIG27 is a schematic structural diagram of a nozzle in another embodiment of the present application;

[0118] FIG28 is a schematic diagram of the outer surface structure of a nozzle in one embodiment of the present application;

[0119] FIG29 is a schematic diagram of the inner surface structure of a nozzle in one embodiment of the present application;

[0120] FIG30 is a mid-plane schematic diagram of a nozzle in one embodiment of the present application;

[0121] FIG31 is a cross-sectional schematic diagram of a spray boom in one embodiment of the present application;

[0122] FIG32 is another cross-sectional schematic diagram of a spray boom in one embodiment of the present application;

[0123] FIG33 is a schematic diagram of a nozzle molding process according to an embodiment of the present application;

[0124] FIG34 is a second schematic diagram of a nozzle molding process according to an embodiment of the present application;

[0125] FIG35 is a third schematic diagram of a nozzle molding process according to an embodiment of the present application;

[0126] FIG36 is a schematic diagram showing the structure of a nozzle during the molding process according to an embodiment of the present application;

[0127] FIG37 is a second structural schematic diagram of a nozzle during the molding process according to an embodiment of the present application;

[0128] FIG38 is a third structural schematic diagram of a nozzle during the molding process according to an embodiment of the present application;

[0129] FIG39 is a fourth structural diagram of a nozzle during the molding process according to an embodiment of the present application;

[0130] FIG40 is a fifth structural diagram of a nozzle during the molding process according to an embodiment of the present application;

[0131] FIG41 is a sixth structural diagram of a nozzle during a molding process according to an embodiment of the present application;

[0132] FIG42 is a seventh structural diagram of a nozzle during the molding process according to an embodiment of the present application;

[0133] FIG43 is an eighth structural schematic diagram of the nozzle during the molding process of an embodiment of the present application. DETAILED DESCRIPTION

[0134] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0135] Please refer to FIG. 1 . An embodiment of the present application provides an oral irrigator 1000 . The oral irrigator 1000 includes a nozzle 100 and a main body 200 .

[0136] Specifically, the main body 200 may include a water tank and a main unit (neither of which is shown in the figure), and the liquid flowing out of the water tank is pressurized by the main unit, and the pressurized liquid is ejected through the nozzle 100 in a pulsed water column, thereby cleaning the user's teeth, wherein the nozzle 100 may be detachably connected to the main unit or may be non-detachably connected to the main unit, and the nozzle 100 is connected to the main unit for receiving the liquid pressurized by the main unit and ejecting the decompressed liquid toward the user's teeth to achieve the effect of cleaning the teeth. According to the structure of the oral cavity, teeth generally include incisors, canines, and molars, whose thickness increases in sequence from the inner and outer directions of the teeth. The nozzle 100 of the embodiment of the present application can clean incisors, canines, and molars.

[0137] 1-2 , in some embodiments, the nozzle 100 includes a spray bar 10 and a spray head 20 .

[0138] Specifically, the spray rod 10 extends along the first direction AA, wherein one end of the spray rod 10 is connected to the main body 200, and the other end of the spray rod 10 is connected to the nozzle 20, and both are connected to the main body 200 and the nozzle 20. In order to realize the transmission of liquid of the water flosser 1000, the spray rod 10 has a spray rod flow channel 11 (see Figure 5), and the spray rod flow channel 11 is used to transmit the liquid transmitted from the main body 200 to the nozzle 20, and then the nozzle 20 forms a pulsed water column with the liquid transmitted from the spray rod flow channel 11 to the user's teeth to achieve the cleaning of the teeth. Optionally, the end of the spray rod 10 connected to the main body 200 can be detachably connected to the main body 200, such as a snap connection, a threaded connection or a magnetic connection, etc., and this application example does not specifically limit this.

[0139] Furthermore, the spray rod 10 may include a plug-in portion 12 and a transmission portion 13 , one end of the plug-in portion 12 is connected to the main body 200 , the other end of the plug-in portion 12 is connected to one end of the transmission portion 13 , and the other end of the transmission portion 13 is connected to the nozzle 20 .

[0140] Referring to Figures 3 to 5, in some embodiments, the nozzle 20 includes a main flow portion 21, a first side portion 22, and a second side portion 23. The main flow portion 21 is connected to the spray bar 10, specifically, the main flow portion 21 is connected to the other end of the transmission portion 13, wherein the main flow portion 21 has a main flow channel 211, and the main flow channel 211 is connected to the spray bar flow channel 11. The first side portion 22 extends from one end of the main flow portion 21 along the second direction BB, and the first side portion 22 has a first flow channel 221 connected to the main flow channel 211. The second side portion 23 extends from the other end of the main flow portion 21 along the second direction BB, and the second side portion 23 has a second flow channel 231 connected to the main flow channel 211. The second side portion 23 is spaced apart from the first side portion 22 and is arranged relative to each other along the first direction AA, so that the main flow portion 21, the first side portion 22, and the second side portion 23 constitute an accommodating cavity 24 for accommodating teeth, wherein the first direction AA is perpendicular to the second direction BB.

[0141] Specifically, the spray rod flow channel 11 transfers the liquid in the water tank in the main body 200 to the main channel 211, and the main channel 211 then diverts the liquid in the spray rod flow channel 11 to the first flow channel 221 and the second flow channel 231, so that the first side portion 22 and the second side portion 23 respectively clean the inner tooth surface and the outer tooth surface of the teeth. The accommodating cavity 24 formed by the main portion 21, the first side portion 22 and the second side portion 23 can be a regular accommodating cavity 24 or an irregular accommodating cavity 24, and the embodiments of the present application do not limit this.

[0142] Please refer to Figures 5-6. Further, the first side portion 22 has a first inner side surface 222, and the first flow channel 221 has a first nozzle 224 formed on the first inner side surface 222; the second side portion 23 has a second inner side surface 232 arranged opposite to the first inner side surface 222 along the first direction AA, and the second flow channel 231 has a second nozzle 234 formed on the second inner side surface 232, wherein along the second direction BB, the first side portion 22 has a first length L1 relative to the main flow portion 21, and the second side portion 23 has a second length L2 relative to the main flow portion 21, and the first length L1 is less than the second length L2.

[0143] Specifically, the main channel 211 is connected to the first channel 221 and the first nozzle 224, and is also connected to the second channel 231 and the second nozzle 234. It is understood that the main channel 211 diverts the liquid received from the spray bar channel 11 to the first channel 221 in the first side portion 22 and the second channel 231 in the second side portion 23, so that the first nozzle 224 formed on the first inner side surface 222 and the second nozzle 234 formed on the second inner side surface 232 can both eject pulsed water jets, thereby cleaning the inner and outer tooth surfaces. It should be noted that the first inner side surface 222 and the second inner side surface 232 can be flat or curved, and this is not limited in this embodiment of the present application.

[0144] In combination with actual usage of the oral irrigator 1000, in one embodiment, the first side portion 22 can be used to clean the inner tooth surface, and the second side portion 23 can be used to clean the outer tooth surface, or the first side portion 22 can be used to clean the outer tooth surface, and the second side portion 23 can be used to clean the inner tooth surface. Because the first side portion 22 is shorter than the second side portion 23, the nozzle head 20 can slide smoothly on teeth of different thicknesses. When the nozzle 20 needs to be removed from the teeth, the user can twist the spray rod 10 in any direction, and the spray rod 10 drives the nozzle 20 to move relative to the teeth. Since the first length L1 is smaller than the second length L2, that is, the first side portion 22 is shorter than the second side portion 23, the contact area between the first side portion 22 and the teeth or the interaction force between the first side portion 22 and the teeth is smaller than the contact area between the second side portion 23 and the teeth or the interaction force between the teeth. Therefore, the first side portion 22 is easier to detach from the tooth surface. After the first side portion 22 detaches from the tooth surface, the first side portion 22 and the second side portion 23 lose their clamping force on the teeth. Therefore, the second side portion 23 can also directly detach from the tooth surface, making it easier to remove the nozzle 20 from the teeth.

[0145] Exemplarily, the first side portion 22 can be used to clean the outer tooth surface, and the second side portion 23 can be used to clean the inner tooth surface. At this time, the user twists the nozzle 100 up and down to move the nozzle head 20 back and forth on the teeth, and the first length L1 is smaller than the second length L2. When the user twists the nozzle 100 up and down, the displacement of the first side portion 22 on the teeth is larger than that of the second side portion 23, so that the first side portion 22 is easier to detach from the outer tooth surface, thereby avoiding the nozzle head 20 from being stuck with the outer tooth surface of the teeth.

[0146] Please continue to refer to Figures 5 and 6. Further, in some embodiments, the nozzle 20 is an elastic member, and the first side portion 22 and the second side portion 23 are arranged at intervals along the first direction AA, and the first side portion 22 is farther away from the spray rod 10 than the second side portion 23. That is, the first side portion is relatively located at the top of the nozzle 20, the first side portion 22 is used to clean the inner tooth surface, and the second side portion 23 is used to clean the outer tooth surface.

[0147] Specifically, the nozzle 20 is an elastic part. It can be understood that the main part 21, the first side part 22 and the second side part 23 are all made of elastic material, wherein the elastic material at least includes silicone material. Since the chemical properties of silicone material are stable, it will not be corroded by saliva even if it is placed in the mouth for a long time, and the silicone material can be edible silicone, so that toxic substances can be avoided from causing damage to the human body.

[0148] During the process of inserting the teeth into the accommodating cavity 24, the first side portion 22 and the second side portion 23 can be deformed when squeezed by the teeth, so that the distance between the first inner side surface 222 of the first side portion 22 and the second inner side surface 232 of the second side portion 23 is increased. In this way, the accommodating cavity 24 can be suitable for teeth of different thicknesses, such as incisors, canines and molars. In particular, after the nozzle 20 finishes cleaning the teeth, if it encounters thicker teeth, the nozzle 20 is likely to be stuck in the teeth. Since the nozzle 20 has the ability to deform, the user can use the deformation characteristics of the nozzle 20 to remove the nozzle 20 stuck in the teeth, so that the nozzle 20 can be prevented from being stuck in the teeth.

[0149] Furthermore, since the nozzle 20 is an elastic part, when the nozzle 20 is removed from the tooth, at least one component of the nozzle 20 undergoes elastic deformation. The embodiment of the present application does not specifically limit the components of the nozzle 20 that are deformed. For example, the main stream 21 may be deformed, the first side portion 22 may be deformed, the second side portion 23 may be deformed, or the main stream 21, the first side portion 22 and the second side portion 23 may all be deformed.

[0150] Specifically, the first side portion 22 can face the inner tooth surface of the teeth, and the second side portion 23 can face the outer tooth surface of the teeth. When the user detaches the nozzle head 20 from the teeth, the inner tooth surface of the teeth is more likely to clamp the nozzle head 20, that is, the first side portion 22 is more likely to be stuck by the teeth than the second side portion 23. According to the habit of using the water flosser 1000, the user moves the nozzle head 20 with the hand as the axis. Because the first length L1 is smaller than the second length L2, the displacement of the first side portion 22 on the inner tooth surface is larger than the displacement of the second side portion 23 on the outer tooth surface. In this way, the nozzle head 20 can be removed from the teeth more conveniently, that is, the nozzle head 20 can be effectively prevented from being stuck between the teeth.

[0151] Furthermore, the first side portion 22 is used to clean the inner tooth surface, and the second side portion 23 is used to clean the outer tooth surface. Because the first length L1 is less than the second length L2, that is, the first side portion 22 is shorter than the second side portion 23, when inserting the tooth into the receiving cavity 24 of the nozzle head 20, the first side portion 22 is less likely to be blocked by the tooth, thereby improving the smoothness of the nozzle 100 when inserted into the oral cavity. The following description uses the example of the first side portion 22 facing the inner tooth surface and the second side portion 23 facing the outer tooth surface.

[0152] 6 , since the nozzle 20 is an elastic member, in some embodiments, the first side portion 22 has a third thickness H3 in the first direction AA, and the second side portion 23 has a fourth thickness H4 in the first direction AA, and the third thickness H3 is smaller than the fourth thickness H4.

[0153] Specifically, along the second direction BB, since the first length L1 of the first side portion 22 relative to the main portion 21 is smaller than the second length L2 of the second side portion 23 relative to the main portion 21, the first side portion 22 is shorter. Therefore, the deformation ability of the first side portion 22 is weaker than that of the second side portion 23. Therefore, the third thickness H3 can be set to be smaller than the fourth thickness H4 so that the first side portion 22 is thinner than the second side portion 23. In this way, the deformation ability of the first side portion 22 can be improved.

[0154] Please refer to Figures 6 and 7. Further, the third thickness H3 and the fourth thickness H4 gradually decrease along the second direction BB and in the direction away from the main flow portion 21. When the first side portion 22 and the second side portion 23 clamp the inner and outer teeth, if the overall thickness of the first side portion 22 and the second side portion 23 remains unchanged, the user's oral cavity has a strong foreign body sensation, thereby affecting the user's comfort in using the oral irrigator 1000. By designing the first side portion 22 and the second side to gradually decrease in thickness in the second direction BB away from the main flow portion 21, at this time, when the teeth are inserted into the nozzle 2 In the process of inserting the nozzle 20 into the accommodating cavity 24, since the third thickness H3 and the fourth thickness H4 gradually decrease along the second direction BB and in the direction away from the main flow portion 21, the closer the nozzle 20 is to the root of the tooth, the larger the opening of the nozzle 20 is. That is, the opening of the accommodating cavity 24 is directed away from the main flow portion 21, and the opening of the accommodating cavity 24 gradually increases in the second direction BB. When the user inserts the nozzle 20 into the oral cavity to clean the teeth, since the opening of the accommodating cavity 24 gradually increases in the second direction BB, the nozzle 20 can smoothly insert into the teeth and clamp the inner and outer tooth surfaces.

[0155] Furthermore, based on the fact that the nozzle 20 is an elastic part, since the third thickness H3 and the fourth thickness H4 gradually decrease along the second direction BB and in the direction away from the main flow portion 21, there is a certain distance between the free end of the first side portion 22 and the inner tooth surface, and there is also a certain distance between the free end of the second side portion 23 and the outer tooth surface. Under the reaction of the cleaning of the pulsed water column, the first side portion 22 and the second side portion 23 are easier to move away from the inner tooth surface and the outer tooth surface of the tooth, thereby improving the deformation ability of the first side portion 22 and the second side portion 23.

[0156] Referring to FIG. 7 , in some embodiments, the thickness of the nozzle 20 in the second direction BB is a fifth thickness H5, which is no greater than 20 mm. For example, the fifth thickness H5 may be 10 mm, 13 mm, 15 mm, 16 mm, or 20 mm. It is understood that the fifth thickness H5 may be the length of the first side portion 22 or the length of the second side portion 23 plus the thickness of the main flow portion 21. Designing the fifth thickness H5 to be no greater than 20 mm not only facilitates insertion of the nozzle 20 into the teeth but also, given that the nozzle 20 is an elastic member, allows for easy removal of the nozzle 20, thereby preventing the nozzle 20 from becoming stuck between the teeth. When the fifth thickness H5 is greater than 20 mm, when the nozzle 20 is inserted into the mouth to clean the teeth, due to the thick fifth thickness H5, the user needs to expand their upper and lower jaws to a certain extent to allow the nozzle 20 to enter the mouth, making it difficult for the nozzle 20 to be inserted into the teeth and difficult to remove.

[0157] Please refer to Figures 8 to 10. In some embodiments, at least a portion of the nozzle 20 is an elastic member and is constructed as an integrated structure. That is, the nozzle 20 can be an elastic member as a whole, or at least a portion of the main flow portion 21 of the nozzle 20, the first side portion 22 and the second side portion 23 are elastic members, and the nozzle 20 is constructed as an integrated structure.

[0158] The nozzle 20 constructs the main portion 21, the first side portion 22 and the second side portion 23 into an integrated structure. The nozzle 20 does not need to be reassembled, the production steps of the nozzle 20 are reduced, and the production efficiency is improved. In addition, the nozzle 20 has better sealing performance and is not easily affected by changes in ambient temperature.

[0159] Furthermore, at least a portion of the main portion 21, the first side portion 22, and the second side portion 23 are elastic members, for example, made of silicone material. Silicone material is chemically stable and will not be corroded by saliva even after long-term oral use. More specifically, the silicone material can be edible silicone, which can prevent toxic substances from harming the human body. It is understood that the elastic material can also include other soft rubber materials, such as PE (polyethylene, abbreviated PE) and PP (polypropylene, abbreviated PP). Soft rubber materials can not only deform elastically but also protect teeth and gums from injury.

[0160] In addition, the main portion 21, the first side portion 22 and the second side portion 23 can undergo elastic deformation to adapt to teeth of different thicknesses. Thicker teeth can also be stuck between the first side portion 22 and the second side portion 23, and the nozzle 20 has a wider range of applications.

[0161] In addition, since the main portion 21, the first side portion 22 and the second side portion 23 are constructed as an integrated structure, the connection strength between the main portion 21, the first side portion 22 and the second side portion 23 is high, the service life is long, and the thickness of the main portion 21 can be reduced, thereby reducing the overall size of the main portion 21, the first side portion 22 and the second side portion 23 in the thickness direction of the main portion 21. When the nozzle 100 is inserted into the mouth and clamped with the teeth, the back of the main portion 21 is not easy to interfere with the teeth, and the use of the nozzle 100 is more comfortable, optimizing the user experience.

[0162] Please refer to FIG. 11 . The central axis of the main flow portion 21 is coincident with the central axis of the spray bar 10 of the oral irrigator 1000 .

[0163] In this way, the central axis of the spray rod flow channel 11 of the spray rod 10 and the central axis of the main channel 211 of the main part 21 can coincide with each other. When the liquid in the spray rod 10 flows to the main channel 211, the speed will not decay or the speed decay will be extremely small, which is beneficial to ensure the water flow speed and water pressure of the liquid sprayed by the nozzle 100, and has a high cleaning force and a good cleaning effect on the oral cavity.

[0164] The central axis of the main flow portion 21 is perpendicular to the central axis of the spray rod 10. Thus, after the spray rod 10 and the nozzle 20 are connected, the overall size in the extension direction of the spray rod 10 is small, thereby reducing the length of the oral irrigator 1000, which is conducive to achieving a short and compact design of the oral irrigator 1000 and making it easier to carry.

[0165] Referring to Figure 12 , when the central axis of the main flow portion 21 coincides with the central axis of the spray bar 10 of the oral irrigator 1000, the cross-sectional area of ​​the main flow channel 211 is smaller than the cross-sectional area of ​​the spray bar flow channel 11 in the spray bar 10. For example, the difference between the cross-sectional area of ​​the main flow channel 211 and the cross-sectional area of ​​the spray bar flow channel 11 in the spray bar 10 is 0.02 mm to 0.1 mm, and the difference between the cross-sectional area of ​​the main flow channel 211 and the cross-sectional area of ​​the spray bar flow channel 11 in the spray bar 10 of the oral irrigator can be 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.08 mm, or 0.1 mm.

[0166] During the processing of the nozzle 100, secondary injection molding is required. When the nozzle 100 is subjected to secondary injection molding, a needle-shaped mold 5 (as shown in Figure 37) needs to be inserted into the main channel 211. The needle-shaped mold 5 can be a needle-shaped structure made of hard materials such as steel needles, iron needles, and glass needles.

[0167] Specifically, the needle-shaped mold 5 needs to be inserted into the main channel 211 of the spray rod 10 so that the central axis of the main flow part 21 of the nozzle 100 after the secondary injection molding coincides with the central axis of the spray rod 10 of the water flosser. Therefore, the cross-sectional area of ​​the needle-shaped mold 5 is smaller than the cross-sectional area of ​​the spray rod flow channel 11 in the spray rod 10, thereby avoiding the needle-shaped mold 5 from being unable to be inserted into the spray rod flow channel 11 in the spray rod 10, and the occurrence of excessive friction between the needle-shaped mold 5 and the spray rod 10, thereby improving the smoothness of the movement of the needle-shaped mold 5 in the spray rod 10.

[0168] In addition, the cross-sectional area of ​​the needle-shaped mold 5 is larger than the cross-sectional area of ​​the main channel 211. After the needle-shaped mold 5 is inserted into the main channel 211, the needle-shaped mold 5 and the main channel 211 are interference fit. Since the main portion 21 is an elastic part, the main portion 21 can be elastically deformed as the needle-shaped mold 5 is inserted. The needle-shaped mold 5 and the main portion 21 will not be damaged due to friction, and the needle-shaped mold 5 fits tightly against the inner wall of the main channel 211, which can seal the main channel 211 and prevent liquid from flowing into the main channel 211 during secondary injection molding and affecting the structure of the main channel 211, thereby ensuring that the structure of the main channel 211 meets expectations so that the liquid flows smoothly in the main channel 211.

[0169] Please continue to refer to Figure 12. The first flow channel 221 includes a first guide channel 2211 and a first outlet channel 2212. The first guide channel 2211 extends along the extension direction of the first side portion 22. One end of the first outlet channel 2212 is connected to the first guide channel 2211, and the other end of the first outlet channel 2212 is arranged on a side surface of the first side portion 22 facing the second side portion 23, that is, the other end of the first outlet channel 2212 is arranged on the first inner side surface 222.

[0170] The second flow channel 231 includes a second guide channel 2311 and a second outlet channel 2312. The second guide channel 2311 extends along the extension direction of the second side portion 23. One end of the second outlet channel 2312 is connected to the second guide channel 2311. The other end of the second outlet channel 2312 is arranged on a side surface of the second side portion 23 facing the first side portion 22, that is, the other end of the second outlet channel 2312 is arranged on the second inner side surface 232.

[0171] Please continue to refer to Figure 12. By dividing the first flow channel 221 into a first guide channel 2211 and a first outlet channel 2212, the central axis of the first guide channel 2211 and the central axis of the first outlet channel 2212 have an angle. Therefore, when the liquid in the first flow channel 221 flows from the first guide channel 2211 to the first outlet channel 2212, the liquid will change direction. The first guide channel 2211 is used to guide the liquid in the main channel 211 to the first outlet channel 2212, and the first outlet channel 2212 is used to guide the liquid in the first guide channel 2211 into the oral cavity. The extension direction of the first outlet channel 2212 is perpendicular or nearly perpendicular to the length direction of the teeth, which has a better cleaning effect on the teeth.

[0172] By dividing the second flow channel 231 into a second guide channel 2311 and a second outlet channel 2312, the central axis of the second guide channel 2311 and the central axis of the second outlet channel 2312 have an angle, so when the liquid in the second flow channel 231 flows from the second guide channel 2311 to the second outlet channel 2312, the liquid will change direction. The second guide channel 2311 is used to guide the liquid in the main channel 211 to the second outlet channel 2312, and the second outlet channel 2312 is used to guide the liquid in the second guide channel 2311 into the oral cavity. The extension direction of the second outlet channel 2312 is perpendicular or nearly perpendicular to the length direction of the teeth, which has a better cleaning effect on the teeth.

[0173] Referring to Figures 11-12, a first protrusion 2221 is provided on the side of the first side portion 22 facing the second side portion 23, and a first outlet channel 2212 is provided through the first protrusion 2221. The provision of the first protrusion 2221 shortens the distance that the water from the first side portion 22 needs to travel to reach the area to be cleaned, reducing the water pressure loss during the water flow, thereby maintaining the water pressure reaching the area to be cleaned and optimizing the cleaning effect.

[0174] Continuing with Figures 11 and 12, the second side portion 23 is provided with a second protrusion 2321 on the side facing the first side portion 22, and the second outlet channel 2312 is provided through the second protrusion 2321. The provision of the second protrusion 2321 shortens the distance that the water from the second side portion 23 needs to travel to reach the area to be cleaned, reducing the water pressure loss along the way, thereby maintaining the water pressure reaching the area to be cleaned and optimizing the cleaning effect.

[0175] Please refer to Figures 12-13. The above-mentioned first outlet channel 2212 includes a first collecting section 2213, a first transition section 2214 and a first pressure reducing section 2215. The first collecting section 2213, the first transition section 2214 and the first pressure reducing section 2215 are arranged in sequence from the inside to the outside along the extension direction of the first outlet channel 2212. That is, the first collecting section 2213 is connected between the first guide channel 2211 and the first transition section 2214, and the first transition section 2214 is connected between the first collecting section 2213 and the first pressure reducing section 2215. One end of the first pressure reducing section 2215 is exposed from the side of the first side portion 22 facing the second side portion 23 for spraying water outward.

[0176] The cross-sectional area of ​​the first collecting section 2213 and the cross-sectional area of ​​the first pressure reducing section 2215 are both greater than the cross-sectional area of ​​the first transition section 2214 .

[0177] In this way, the cross-sectional area of ​​the first collecting section 2213 is larger, and the liquid in the first guide channel 2211 can be quickly collected into the first outlet channel 2212; the cross-sectional area of ​​the first transition section 2214 is smaller than the cross-sectional area of ​​the first collecting section 2213. After the liquid in the first collecting section 2213 flows into the first transition section 2214, the water pressure and the water flow rate will increase, thereby increasing the water output and the water flow rate of the first side portion 22, and ensuring the cleaning effect; the cross-sectional area of ​​the first decompression section 2215 is also larger than the cross-sectional area of ​​the first transition section 2214, so the liquid sprayed from the first decompression section 2215 covers a large area, so as to achieve large-scale cleaning of the oral cavity, and can reduce local water pressure, avoid a tingling sensation when cleaning the oral cavity, and optimize the user experience.

[0178] Please refer to Figures 12 and 14. The above-mentioned second outlet channel 2312 includes a second collecting section 2313, a second transition section 2314 and a second pressure reducing section 2315. The second collecting section 2313, the second transition section 2314 and the second pressure reducing section 2315 are arranged in sequence from inside to outside along the extension direction of the second outlet channel 2312. That is, the second collecting section 2313 is connected between the second guide channel 2311 and the second transition section 2314, and the second transition section 2314 is connected between the second collecting section 2313 and the second pressure reducing section 2315. One end of the second pressure reducing section 2315 is exposed from the side of the second side portion 23 facing the first side portion 22 for spraying water outward.

[0179] The cross-sectional area of ​​the second collecting section 2313 and the cross-sectional area of ​​the second pressure reducing section 2315 are both greater than the cross-sectional area of ​​the second transition section 2314 .

[0180] In this way, the cross-sectional area of ​​the second collecting section 2313 is larger, and the liquid in the second guide channel 2311 can be quickly collected into the second outlet channel 2312; the cross-sectional area of ​​the second transition section 2314 is smaller than the cross-sectional area of ​​the second collecting section 2313. After the liquid in the second collecting section 2313 flows into the second transition section 2314, the water pressure and the water flow rate will increase, thereby increasing the water output and the water flow rate of the second side portion 23, and ensuring the cleaning effect; the cross-sectional area of ​​the second decompression section 2315 is also larger than the cross-sectional area of ​​the second transition section 2314, so the liquid sprayed from the second decompression section 2315 covers a large area, so as to achieve large-scale cleaning of the oral cavity, and can reduce local water pressure, avoid a tingling sensation when cleaning the oral cavity, and optimize the user experience.

[0181] The cross-sectional area of ​​the first collecting section 2213 gradually decreases from the inside to the outside. In other words, the first collecting section 2213 can be constructed as a truncated cone-shaped channel, and the inner wall surface of the first collecting section 2213 can be a plane or an outwardly convex curved surface.

[0182] In this way, the cross-sectional area of ​​the end where the first collecting section 2213 is connected to the first guide channel 2211 is large, which can achieve the effect of collecting flow, and the cross-sectional area of ​​the end where the first collecting section 2213 is connected to the first guide channel 2211 is closer to the cross-sectional area of ​​the first transition section 2214. The inner wall surface of the first outlet channel 2212 will not form a step or the size of the step is smaller at the junction of the first collecting section 2213 and the first guide channel 2211. When the liquid flows from the first collecting section 2213 to the first transition section 2214, the turbulence of the liquid at the junction of the first collecting section 2213 and the first guide channel 2211 is lower, which is conducive to ensuring the smoothness of the flow of the liquid in the first outlet channel 2212.

[0183] The cross-sectional area of ​​the second collecting section 2313 gradually decreases from the inside to the outside. In other words, the second collecting section 2313 can be constructed as a truncated cone-shaped channel, and the inner wall surface of the second collecting section 2313 can be a plane or an outwardly convex curved surface.

[0184] In this way, the cross-sectional area of ​​one end where the second collecting section 2313 is connected to the second guide channel 2311 is large, which can achieve the effect of collecting flow, and the cross-sectional area of ​​one end where the second collecting section 2313 is connected to the second guide channel 2311 is closer to the cross-sectional area of ​​the second transition section 2314. The inner wall surface of the second outlet channel 2312 will not form a step or the size of the step is smaller at the junction of the second collecting section 2313 and the second guide channel 2311. When the liquid flows from the second collecting section 2313 to the second transition section 2314, the turbulence of the liquid at the junction of the second collecting section 2313 and the second guide channel 2311 is lower, which is conducive to ensuring the smoothness of the flow of the liquid in the second outlet channel 2312.

[0185] For example, the first transition section 2214 can be configured as a cylindrical channel, and the second transition section 2314 can be configured as a cylindrical channel. The first decompression section 2215 can be configured as a cylindrical channel, and the second decompression section 2315 can be configured as a cylindrical channel. Alternatively, the first decompression section 2215 can be configured as a truncated cone-shaped channel, and the inner wall surface of the first decompression section 2215 can be a flat surface or an outwardly convex curved surface, and the second decompression section 2315 can be configured as a truncated cone-shaped channel, and the inner wall surface of the first decompression section 2215 can be a flat surface or an outwardly convex curved surface.

[0186] The first outlet channel 2212 is located between the two ends of the first flow guiding channel 2211 and is close to the end of the first flow guiding channel 2211 away from the main channel 211. In other words, in the extension direction of the first flow guiding channel 2211, the two ends of the first flow guiding channel 2211 exceed the outer edge of the end where the first outlet channel 2212 connects to the first flow guiding channel 2211.

[0187] In this way, it can ensure that the connecting area between the first flow guide channel 2211 and the first outlet channel 2212 is large enough, avoiding the small connecting area between the first flow guide channel 2211 and the first outlet channel 2212 due to errors such as processing errors, and ensuring the water outlet speed and water output of the first flow guide channel 2211, thereby improving the cleaning effect of the water flosser.

[0188] 12 , the second outlet channel 2312 is located between the two ends of the second flow guiding channel 2311 and is close to the end of the second flow guiding channel 2311 that is away from the main channel 211. In other words, along the extension direction of the second flow guiding channel 2311, the two ends of the second flow guiding channel 2311 extend beyond the outer edge of the end where the second outlet channel 2312 connects to the second flow guiding channel 2311.

[0189] In this way, it can ensure that the connecting area between the second flow guide channel 2311 and the second outlet channel 2312 is large enough, avoiding the small connecting area between the second flow guide channel 2311 and the second outlet channel 2312 due to errors such as processing errors, and ensuring the water outlet speed and water output of the second flow guide channel 2311, so that the cleaning effect of the water flosser 1000 is better.

[0190] Referring to Figures 8-10 , when the central axis of the main flow section 21 coincides with the central axis of the spray boom 10, the main flow section 21 includes a flow channel portion 214 and a connecting portion 215. The flow channel portion 214 is connected to the first side portion 22 and the second side portion 23, respectively. The connecting portion 215 is connected to the flow channel portion 214 and the spray boom 10, respectively. The flow channel portion 214 and the connecting portion 215 are arranged along the extension direction of the main flow section 21.

[0191] The elastic deformation of the flow channel portion 214 adjusts the proximity or separation of the first side portion 22 and the second side portion 23, that is, adjusts the distance between the first side portion 22 and the second side portion 23, to accommodate different tooth shapes. The deformation of the connecting portion 215 adjusts the relative position of the flow channel portion 214 and the spray bar 10, for example, by adjusting the angle between the flow channel portion 214 and the spray bar 10, or adjusting the deflection angle between the flow channel portion 214 and the spray bar 10, thereby achieving the relative position between the first side portion 22 and the second side portion 23 and the spray bar 10. When the nozzle 100 is inserted into the oral cavity at different positions, the positions of the first side portion 22 and the second side portion 23 can be adjusted, so that the first side portion 22 and the second side portion 23 can effectively clean different areas of the oral cavity.

[0192] Please refer to Figures 8 and 15. The end of the above-mentioned connecting portion 215 facing the spray rod 10 is provided with a socket hole 2151, which is connected to the main channel 211. The spray rod 10 is inserted into the socket hole 2151, and the spray rod 10 is sealed with the inner wall of the socket hole 2151.

[0193] In this way, on the one hand, the positioning connection between the nozzle 20 and the spray rod 10 can be achieved. On the other hand, since the spray rod 10 is an elastic part, when the spray rod 10 is sealed with the inner wall of the sleeve hole 2151, it can ensure that there is elastic contact between the spray rod 10 and the inner wall of the sleeve hole 2151. The inner wall of the sleeve hole 2151 can adaptively deform elastically according to the shape of the spray rod 10, thereby ensuring the tightness of the contact between the spray rod 10 and the inner wall of the sleeve hole 2151, improving the sealing effect, and avoiding liquid leakage from between the nozzle 20 and the spray rod 10.

[0194] Please refer to FIG8 and FIG12 . The inner wall of the sleeve hole 2151 is provided with a first stop step 2154 . The outer peripheral surface of the spray rod 10 is provided with a second stop step 14 . The first stop step 2154 and the second stop step 14 abut against each other.

[0195] In this way, the depth of the spray rod 10 inserted into the socket hole 2151 can be limited, avoiding the spray rod 10 from being excessively inserted into the socket hole 2151, thereby ensuring that the overall size between the spray rod 10 and the nozzle 20 in the extension direction of the spray rod 10 is sufficient, which is conducive to enabling the nozzle 100 to clean the inside of the oral cavity in a larger range and ensure the cleaning area.

[0196] 11 and 15 , the main flow portion 21 has an opposing transition inner surface 212 and a transition outer surface 213. The transition inner surface 212 is connected to the first side portion 22 and the second side portion 23, that is, the transition inner surface 212 is connected to the first inner side surface 222 and the second inner side surface 232. In the width direction of the flow channel portion 214, that is, in the third direction CC, the flow channel portion 214 is larger than the connecting portion 215. The connecting portion 215 is connected to the transition outer surface 213 and forms an arcuate transition.

[0197] Specifically, the connecting portion 215 can be a cylindrical structure, so that the force on the connecting portion 215 is more uniform, the connecting portion 215 can have roughly the same elastic deformation ability in 360 degrees, the structural strength of the connecting portion 215 is higher, and the probability of the connecting portion 215 being deformed and damaged by force is reduced.

[0198] The main flow portion 21 can be a flat structure, with the transition inner surface 212 and the transition outer surface 213 located on opposite sides of the thickness direction of the main flow portion 21. The transition inner surface 212 is used to face the area to be cleaned, such as the teeth. By connecting the connecting portion 215 with the transition outer surface 213, the cleaning effect of the nozzle 100 on the oral cavity will not be affected by the connecting portion 215, and the layout between the connecting portion 215 and the first side portion 22 and the second side portion 23 will not interfere with each other.

[0199] In addition, since the connecting portion 215 and the transition outer portion 213 have an arc-shaped transition, stress concentration will not occur at the connection between the connecting portion 215 and the transition outer portion 213, so the probability of damage to the connection between the connecting portion 215 and the transition outer portion 213 is low, thereby extending the service life of the nozzle 20.

[0200] Please refer to Figure 16. In some embodiments, the connecting portion 215 is provided with a deformation section 2152 at the end away from the spray rod 10, wherein at least the deformation section 2152 is an elastic member, so that the nozzle head 20 can move relative to the spray rod 10 to adjust the position of the accommodating cavity 24, the first nozzle 224 and the second nozzle 234 relative to the spray rod 10.

[0201] It is understandable that when the nozzle 20 clamps the inner and outer tooth surfaces of the teeth, due to the different thickness of each user's teeth, some teeth are thicker, which will make it difficult for the nozzle 20 to move smoothly on the tooth surface, or the nozzle 20 is stuck by the teeth during movement, making it difficult to remove. By setting the deformation section 2152 as an elastic member, during the tooth flushing process, the nozzle 20 is subjected to the reaction force of the teeth or the pulsed water column, and the user can rotate or twist the spray rod 10 left and right to make the deformation section 2152 deform. This allows the nozzle 20 to adjust its position on the teeth, which is not only beneficial for comprehensive cleaning of the teeth in the oral cavity, but also improves the cleaning effect of the nozzle 100 on the teeth; moreover, the deformation of the deformation section 2152 can also change the distance, angle and clamping force between the first side portion 22 and the second side portion 23 and the inner and outer teeth, thereby changing the position of the accommodating cavity 24, the first nozzle 224 and the second nozzle 234 relative to the spray rod 10, making it easy to remove the nozzle 20 from the oral cavity, thereby reducing the possibility of the nozzle 100 being stuck on the teeth.

[0202] Among them, the deformation resistance of the deformation section 2152 in the second direction BB is greater than the deformation resistance in the third direction CC. In this way, when the tooth extends into the accommodating cavity 24, the first side portion 22 and the second side portion 23 can be prevented from causing the nozzle 20 to deform in the second direction BB when they come into contact with the inner and outer tooth surfaces, thereby avoiding the instability of the water flow direction of the first nozzle 224 and the second nozzle 234, or the first side portion 22 and the second side portion 23 are difficult to fix for cleaning the teeth, affecting the cleaning effect of the nozzle 100.

[0203] Furthermore, the deformation section 2152 is an elastic part, and the elastic part can be an elastic material. The elastic material can include silicone material. Except for strong alkali and hydrofluoric acid, silicone material does not react with any substance, nor is it soluble in water or any solvent. Therefore, the chemical properties of silicone material are stable, and even if it is used in the mouth for a long time, it will not be corroded by saliva. It should be noted that the elastic material can also include other soft rubber materials, such as polyethylene, polypropylene, etc.

[0204] In the embodiment of the present application, the deformation section 2152 is an elastic member. The user twists the spray rod 10 to deform the deformation section 2152 so that the nozzle 20 can be adjusted to the position on the teeth. The deformation of the deformation section 2152 can also change the distance, angle and clamping force between the first side portion 22 and the second side portion 23 and the inner and outer teeth, thereby changing the position of the accommodating cavity 24, the first nozzle 224 and the second nozzle 234 relative to the spray rod 10, making it easy to remove the nozzle 20 from the oral cavity. In this way, the cleaning effect of the nozzle 100 on the teeth is improved, and the possibility of the nozzle 100 being stuck on the teeth is reduced.

[0205] In some embodiments, the deformation ability of the deformation section 2152 in the second direction BB is smaller than the deformation ability of the deformation section 2152 in the third direction CC, wherein the third direction CC is perpendicular to the first direction AA and the second direction BB. In this way, when the user inserts the nozzle 20 into the teeth or removes the nozzle 20 from the teeth, the nozzle 20 needs to move along the second direction BB. Therefore, the deformation ability of the deformation section 2152 in the second direction BB is set to be smaller than the deformation ability of the deformation section 2152 in the third direction CC, so that the deformation section 2152 has a certain structural strength in the second direction BB, and compared with the third direction CC, the deformation section 2152 is less likely to deform in the second direction BB, thereby avoiding the nozzle 20 being too easily deformed when inserted into or removed from the teeth, making it difficult for the nozzle 20 to be inserted into or removed from the teeth.

[0206] Furthermore, the deformation ability of the deformation section 2152 in the second direction BB is smaller than the deformation ability of the deformation section 2152 in the third direction CC, that is, the deformation section 2152 is more likely to deform in the third direction CC than the deformation section 2152 in the second direction BB, so that after the nozzle 20 is stuck in the teeth, the relative position between the nozzle 20 and the teeth can be adjusted, so that the nozzle 20 can move back and forth along the arrangement direction of the teeth, that is, the user can adjust the cleaning position of the nozzle 20 for the teeth without taking out the nozzle 20, thereby improving the convenience of the nozzle 20 for cleaning the teeth.

[0207] Among them, the deformation form of the deformation section 2152 can be in various forms. For example, the thickness of the deformation section 2152 in the second direction BB can be designed to be greater than the thickness of the deformation section 2152 in the third direction CC, so that the deformation ability of the deformation section 2152 in the second direction BB is smaller, wherein the thickness of the deformation section 2152 in the second direction BB and the thickness of the deformation section 2152 in the third direction CC are the thickness between the inner wall surface of the main channel 211 and the outer surface of the deformation section 2152.

[0208] For another example, a groove may be provided on the outer surface of the deformation section 2152 through which the third direction CC passes, so that the deformation section 2152 is more easily deformed in the third direction CC.

[0209] Please continue to refer to Figure 16. In some embodiments, a material reduction groove 2153 is provided on the outer surface of the deformation section 2152. Specifically, the material reduction groove 2153 can be set at any position on the outer surface of the deformation section 2152. On the one hand, it is convenient for the user to intuitively observe the position of the deformation section 2152. On the other hand, designing the material reduction groove 2153 on the outer surface of the deformation section 2152 can make it easier for the deformation section 2152 to deform, so that the nozzle 20 can move relative to the spray rod 10, and it is easier to adjust the position of the accommodating cavity 24 and the first nozzle 224 and the second nozzle 234 relative to the spray rod 10. In this way, the deformation ability of the deformation section 2152 is improved.

[0210] Continuing with FIG. 16 , further, in some embodiments, the material-reducing grooves 2153 are disposed on the outer surfaces of the connecting portion 215 that are oppositely disposed along the third direction CC, and the material-reducing grooves 2153 extend along the second direction BB, wherein the third direction CC, the first direction AA, and the second direction BB are perpendicular to each other. Specifically, the material-reducing grooves 2153 are disposed on the left and right outer surfaces of the connecting portion 215, and the material-reducing grooves 2153 extend along the second direction BB. Based on the user's usage habits of the dental irrigator 1000, that is, when the user engages or disengages the nozzle head 20 from the tooth, the nozzle head 20 needs to move along the second direction BB. Therefore, the deformation capacity of the deformable section 2152 in the second direction BB is smaller than the deformation capacity of the deformable section 2152 in the third direction CC. Furthermore, the user can achieve the deformation capacity of the connecting portion 215 in the third direction CC by rotating or twisting the spray bar 10 left and right, thereby improving the deformation performance of the connecting portion 215 in the third direction CC.

[0211] Furthermore, in some other embodiments, the material reduction groove 2153 extends obliquely in a direction away from the spray rod 10. It can be understood that the extension direction of the material reduction groove 2153 is set at an angle to the extension direction of the spray rod 10. When the connecting portion 215 is deformed, the connection between the connecting portion 215 and the flow channel portion 214 will not be torn due to frequent twisting of the spray rod 10 causing the connecting portion 215 to deform. In this way, the durability of the connecting portion 215 is improved.

[0212] In some embodiments, the width of the material reduction groove 2153 in the first direction AA is smaller than the diameter of the deformation section 2152. It can be understood that when the deformation section 2152 is deformed, that is, the user uses his hand as the axis to horizontally twist the spray rod to deform the deformation section 2152 so that the nozzle 20 can move relative to the spray rod 10. When the material reduction groove 2153 is deformed, because the width of the material reduction groove 2153 in the first direction AA is smaller than the diameter of the deformation section 2152, the material reduction groove 2153 will not be excessively deformed, causing the liquid transmitted from the spray rod 10 to be blocked in the deformation section 2152, so that the first nozzle 224 and the second nozzle 234 of the nozzle head 20 cannot clean the teeth. In this way, the situation of the deformation section 2152 blocking the liquid is reduced.

[0213] In some embodiments, the material reduction groove 2153 extends obliquely in a direction away from the spray rod 10 in the direction BB away from the flow channel portion 214. It can be understood that since the main portion 21 can be deformed and the connection between the connecting portion 215 and the flow channel portion 214 is easily torn and broken when the deformation section 2152 is deformed, it is designed that the material reduction groove 2153 extends obliquely in a direction away from the spray rod 10 in the direction BB away from the flow channel portion 214, so that the material reduction groove 2153 can be relatively away from the connection between the connecting portion 215 and the flow channel portion 214. In this way, the problem of tearing of the connection between the connecting portion 215 and the flow channel portion 214 due to long-term deformation of the deformation section 2152 can be avoided.

[0214] Continuing to refer to FIG. 16 , in one embodiment, along the first direction AA, a plurality of material reducing grooves 2153 are spaced apart on the deformation section 2152 , and a distance d1 between adjacent material reducing grooves 2153 is less than or equal to 2.5 mm.

[0215] Specifically, the material reduction grooves 2153 are provided with multiple areas where the deformation section 2152 is increased, thereby avoiding the problem of excessive deformation. The spacing between adjacent material reduction grooves 2153 can be 1mm, 1.5mm, 2mm, or 2.5mm. When the user needs to twist the deformation section 2152 to deform, the deformation area of ​​the deformation section 2152 can be more concentrated, making it easier to adjust the position of the accommodating cavity 24, the first nozzle 224, and the second nozzle 234 relative to the spray bar 10, thereby improving the deformation performance of the deformation section 2152. If the spacing between adjacent material reduction grooves 2153 is greater than 2.5mm, the deformation area of ​​the deformation section 2152 is more dispersed, and the user needs to use greater force to deform the deformation section 2152, resulting in a decrease in the deformation ability of the deformation section 2152.

[0216] Please refer to Figures 16 and 17. In some embodiments, a main channel 211 connected to the first nozzle 224 and the second nozzle 234 is formed in the deformation section 2152. Along the third direction CC, the inner wall surface of the main channel 211 and the bottom of the material reduction groove 2153 have a first thickness H1, and the first thickness H1 is greater than or equal to 0.5 mm and less than or equal to 0.9 mm.

[0217] Specifically, the main channel 211 can receive the liquid transmitted from the spray rod 10, and the liquid in the main channel 211 can be diverted to the first side portion 22 and the second side portion 23, and then the liquid is sprayed out through the first nozzle 224 and the second nozzle 234, so as to achieve cleaning of the teeth, wherein the first thickness H1 can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm. When the deformation segment 2152 is twisted, the design of the material reduction groove 2153 makes it easier for the deformation segment 2152 to deform. However, because the first thickness H1 is greater than or equal to 0.5mm and less than or equal to 0.9mm, the deformation segment 2152 will not be broken due to frequent deformation, thus improving the The deformation ability of the deformation section 2152 also ensures the durability of the deformation section 2152; when the first thickness H1 is less than 0.5 mm, the thickness from the inner wall surface of the main channel 211 to the bottom of the material reduction groove 2153 is relatively thin, and the user frequently deforms the deformation section 2152, and the material reduction groove 2153 will also be deformed accordingly. When the material reduction groove 2153 is deformed many times, it is easy to cause the bottom of the material reduction groove 2153 to break; when the first thickness H1 is greater than 0.9 mm, the thickness from the inner wall surface of the main channel 211 to the bottom of the material reduction groove 2153 is relatively thick. At this time, the material reduction groove 2153 does not play a role in facilitating the deformation of the deformation section 2152, resulting in a reduction in the deformation ability of the material reduction groove 2153 on the deformation section 2152.

[0218] Please refer to Figures 18 and 19. In some embodiments, the length L3 of the deformation section 2152 along the first direction AA is greater than or equal to 3.5 mm and less than or equal to 15 mm. For example, the length L3 of the deformation section 2152 along the first direction AA can be 3.5 mm, 5 mm, 8 mm, 10 mm, 13 mm, or 15 mm. At this time, the length L3 of the deformation section 2152 along the first direction AA is designed to be within the range of greater than or equal to 3.5 mm and less than or equal to 15 mm, which not only improves the deformation ability of the deformation section 2152, but also improves the cleaning effect of the nozzle 100. If the length L3 of the deformation section 2152 along the first direction AA is less than 3.5 mm, because the length of the deformation section 2152 along the first direction AA is too small, that is, the length of the deformation section 2152 is small, the user needs to twist the spray rod 10 to reduce the area of ​​the deformation section 2152 that is deformed, resulting in a decrease in the deformation ability of the deformation section 2152. Moreover, due to the poor deformation ability of the deformation section 2152, the user needs to use greater force to deform the deformation section 2152, which may easily cause the deformation section 2152 to tear, thereby causing the elastic connector 13 to be deformed. The durability is reduced; the deformation section 2152 is an elastic part, so the deformation section 2152 is easy to deform. If the length L3 of the deformation section 2152 along the first direction AA is greater than 15 mm, the deformation section 2152 may be deformed under the pressure of the liquid sprayed from the first nozzle 224 and the second nozzle 234 when the nozzle 100 cleans the teeth, resulting in difficulty in positioning the first side portion 22 and the second side portion 23, so that the first nozzle 224 and the second nozzle 234 sometimes fail to clean the gaps between the teeth, thereby reducing the cleaning effect of the nozzle 100.

[0219] In some embodiments, the diameter of the deformation section 2152 is greater than or equal to 1.2 mm. For example, the diameter of the deformation section 2152 can be 1.2 mm, 2 mm, 3 mm, etc. Since the diameter of the deformation section 2152 is designed to be greater than or equal to 1.2 mm, when the deformation section 2152 is deformed, the deformation section 2152 is not easy to break, thereby improving the durability of the elastic connector 13; when the diameter of the deformation section 2152 is less than 1.2 mm, when the deformation section 2152 is twisted, due to the small diameter of the deformation section 2152 and the long-term use of the twisting spray rod 10 to deform the deformation section 2152, it is easy to cause the deformation section 2152 to break, thereby reducing the durability of the elastic connector 13.

[0220] In some embodiments, the hardness of the deformation section 2152 is greater than or equal to 40 Shore hardness and less than or equal to 70 Shore hardness. For example, the hardness of the deformation section 2152 can be 40 Shore hardness, 50 Shore hardness, 60 Shore hardness, or 70 Shore hardness. When the nozzle 20 extends from the accommodating cavity 24 into the accommodating cavity 12b, the user twists the spray rod 10 to deform the deformation section 2152 so that the nozzle 20 cleans the teeth. In the range of less than or equal to 70 Shore hardness, the nozzle 20 will not be inaccurately positioned on the tooth cleaning part due to excessive deformation of the deformation section 2152, so that the cleaning effect of the nozzle 100 is improved; when the hardness of the deformation section 2152 is less than 40 Shore hardness, when the nozzle 20 is extended into the accommodating cavity 24, the first side portion 22 and the second side portion 23 contact the teeth, and when the nozzle 20 cleans the inner and outer tooth surfaces, due to the low hardness of the deformation section 2152, the deformation section 2 152 is very easy to deform, that is, the elastic connector 13 is easy to deform, making it difficult for the nozzle 20 to position the tooth part that needs to be cleaned, and making it difficult for the nozzle 20 to clean the teeth in a concentrated manner, thus reducing the cleaning effect of the nozzle 100; when the hardness of the deformable section 2152 is greater than 70 Shore hardness, the user twists the spray rod 10 to deform the deformable section 2152, so that the nozzle 20 moves relative to the spray rod 10, thereby realizing the movement of the nozzle 20 on the teeth, but due to the deformation of the deformable section 2152 Due to its high hardness, it is difficult for the user to twist the deformation section 2152, which makes it difficult for the nozzle 20 to move back and forth on the teeth, so that the nozzle 20 cannot fully clean the teeth, reducing the cleaning effect of the nozzle 100. In particular, when the nozzle 20 is stuck on the teeth, due to the high hardness of the deformation section 2152, that is, the deformation ability of the deformation section 2152 is reduced, it is difficult to adjust the position of the accommodating cavity 24, the first nozzle 224 and the second nozzle 234 relative to the spray rod 10, making it difficult to remove the nozzle 20 from the mouth.

[0221] 20-21 , based on the main channel 211 in the deformation section 2152 , the inner wall surface of the main channel 211 and the outer surface of the deformation section 2152 have a second thickness H2 , and the second thickness H2 is greater than or equal to 1 mm and less than or equal to 3 mm.

[0222] Specifically, the second thickness H2 can be 1 mm, 2 mm, or 3 mm. When the user twists the deformation section 2152, the deformation section 2152 can be easily deformed; if the second thickness H2 is less than 1 mm, that is, the thickness from the inner wall surface of the main channel 211 to the outer surface of the deformation section 2152 is thinner, when the user frequently twists the deformation section 2152, the deformation section 2152 is easily broken; if the second thickness H2 is greater than 3 mm, that is, the thickness from the inner wall surface of the main channel 211 to the outer surface of the deformation section 2152 is thicker, the user may need to use greater force to twist the spray rod 10 to deform the deformation section 2152, thus resulting in a decrease in the deformation ability of the deformation section 2152.

[0223] Furthermore, based on the fact that the nozzle 20 is a soft rubber component, wherein the soft rubber component is the same as the elastic component mentioned above, the nozzle 20 needs to meet at least one of the following conditions, that is, along the first direction AA, the overall length of the nozzle 20 is greater than the diameter of the deformation section 2152; along the second direction BB, the overall height of the nozzle 20 is greater than the diameter of the deformation section 2152; along the third direction CC, the overall width of the nozzle 20 is greater than the diameter of the deformation section 2152. It should be noted that the entire nozzle 20 is defined as the entirety formed by the first side portion 22, the second side portion 23, and the flow channel portion 214.

[0224] For example, when the overall length of the nozzle 20 is greater than the diameter of the deformation section 2152 along the first direction AA, it can be understood that the overall length of the nozzle 20 is, and the length of the first side portion 22 and the second side portion 23 plus the length of the flow channel portion 214 is greater than the diameter of the deformation section 2152. When the user twists the spray rod 10, since the deformation section 2152 is closer to the spray rod 10, the deformation section 2152 can be deformed before the nozzle 20, and the length of the first side portion 22 and the second side portion 23 can be extended into the teeth to clean the gaps between the teeth. Since the diameter of the deformation section 2152 is smaller than the overall length of the nozzle 20, it is easy for the deformation section 2152 to deform so that the nozzle 20 can The teeth are cleaned by moving back and forth in the oral cavity, thereby improving the cleaning effect of the nozzle 100; if the diameter of the deformed section 2152 is larger than the overall length of the nozzle 20, the overall length of the nozzle 20 is shorter. When the nozzle 20 cleans the teeth, the first side portion 22 and the second side portion 23 may be unable to extend into the gaps between the teeth due to the shorter lengths of the two first side portions 22 and the second side portions 23, resulting in the two first nozzles 224 and the second nozzles 234 being unable to clean the gaps between the teeth, and the diameter of the deformed section 2152 is too large to form a high-pressure water column from the liquid transmitted by the spray rod 10 and spray it out through the first nozzle 224 and the second nozzle 234, resulting in a reduced cleaning effect.

[0225] Please refer to Figures 18-19. In some embodiments, the flow channel portion 214 and the connecting portion 215 are both soft rubber parts and are molded separately. The flow channel portion 214 includes a first sub-portion 2141 and a second sub-portion 2142. The first sub-portion 2141 is integrally molded with the second connecting section 133. The second sub-portion 2142 is integrally molded with the first side portion 22 and the second side portion 23, and is assembled and fixed with the first sub-portion 2141 to jointly construct a diversion channel 2143. The diversion channel 2143 is connected to the first nozzle 224 and the second nozzle 234.

[0226] Specifically, the first sub-section 2141 can receive the liquid transmitted by the spray rod 10, and divert it to the two first side sections 22 and the second side section 23 through the second sub-section 2142. The first side section 22 and the second side section 23 will spray the liquid received from the first sub-section 2141 from the first nozzle 224 and the second nozzle 234, thereby achieving teeth cleaning. The first sub-section 2141 and the second connecting section 133 are integrally formed, and the first sub-section 2141 and the second sub-section 2142 are assembled and fixed, that is, the first sub-section 2141 can be arranged on the back of the second sub-section 2142 to strengthen the overall thickness of the flow channel section 214, and because the flow channel section 214 has a certain thickness, when the nozzle 20 is subjected to the force of the deformation section 2152, the nozzle 20 is not easily deformed in the third direction CC.

[0227] Please refer to Figure 19. Furthermore, the first sub-section 2141 includes an annular protrusion 2144, and the second sub-section 2142 has an annular mounting groove 2145. The annular protrusion 2144 is clamped in the annular mounting groove 2145, that is, assembly and installation are performed so that the first sub-section 2141 is fixedly connected to the second sub-section 2142, thereby improving the stability of the connection of the flow channel section 214.

[0228] It should be noted that the embodiment of the present application does not specifically limit the connection form between the first sub-section 2141 and the second sub-section 2142.

[0229] Please continue to refer to Figure 19. Furthermore, the bottom of the annular mounting groove 2145 has a glue filling groove 2146, and glue is provided in the glue filling groove 2146. The glue is bonded to the groove wall of the glue filling groove 2146 and the second sub-section 2142. That is, after the first sub-section 2141 and the second sub-section 2142 are connected by snapping, a glue filling groove 2146 can be provided at the bottom of the annular mounting groove 2145. The glue filling groove 2146 is provided with glue. On the basis of the snap connection between the first sub-section 2141 and the second sub-section 2142, the connection between the first sub-section 2141 and the second sub-section 2142 is further fixed by glue. When the user twists the spray rod 10 to deform the elastic connecting member 13, the flow channel portion 214 and the connecting portion 215 will not be separated due to the weak connection between the first sub-section 2141 and the second sub-section 2142.

[0230] Please continue to refer to Figure 19. In some embodiments, the second sub-portion 2142 has a first outer surface 2147 arranged toward the deformation section 2152. Along the second direction BB, the first outer surface 2147 has a first spacing d2 to the outer surface of the deformation section 2152. The first spacing d2 is greater than or equal to 1.2 mm and less than or equal to 2 mm. For example, the first spacing d2 can be 1.2 mm, 1.5 mm, 1.8 mm, or 2 mm. By designing the first spacing d2 to be within the range of greater than or equal to 1.2 mm and less than or equal to 2 mm, when the deformation section 2152 is deformed, because the first spacing d2 has a certain range, the connection between the connecting portion 215 and the flow channel portion 214 is not easily torn, thereby improving the durability of the nozzle 100. If the first spacing d2 is less than 1.2 mm, when the deformation section 2152 is frequently deformed, the first outer surface 2147 is subjected to a large deformation force, which may easily cause the connection between the connecting portion 215 and the flow channel portion 214 to be torn, thereby reducing the durability of the nozzle 100; if the first spacing d2 is greater than 2 mm, that is, the distance from the first outer surface 2147 to the outer surface of the deformation section 2152 is large, when the deformation section 2152 is deformed, the deformation force that the deformation section 2152 can transmit to the nozzle 20 is small, that is, the range of movement of the nozzle 20 relative to the spray rod 10 is small. In particular, when the force of twisting the spray rod 10 is small, the deformation section 2152 may not transmit the deformation force to the nozzle 20, so that the nozzle 20 does not move relative to the spray rod 10, and does not adjust the position of the accommodating cavity 24 and the first nozzle 224 and the second nozzle 234 relative to the spray rod 10, resulting in an increased possibility of the nozzle 100 being stuck with the teeth.

[0231] Referring to FIG. 7 , the connection between the main flow portion 21 and the spray bar 10 further comprises a sixth thickness H6 in the second direction BB. Specifically, the sixth thickness H6 may be the thickness of the main flow portion 21 in the second direction BB. The ratio of the sixth thickness H6 to at least one of the third thickness H3 and the fourth thickness H4 is no less than 2 and no greater than 5. For example, the ratio of the sixth thickness H6 to the third thickness H3 may be 2, 3, 4, or 5. By designing the ratio of the sixth thickness H6 to the third thickness H3 to be no less than 2 and no greater than 5, the first side portion 22 and the connection between the main flow portion 21 and the spray bar 10 are all within a thickness range suitable for the oral cavity. This not only solves the problem of inadequate cleaning between teeth, but also facilitates the engagement of the first side portion 22 with the inner tooth surface. If the ratio of the sixth thickness H6 to the third thickness H3 is less than 2, the length of the first side portion 22 is relatively short, resulting in the problem of inadequate cleaning between teeth. If the ratio of the sixth thickness H6 to the third thickness H3 is greater than 5, the length of the first side portion 22 is relatively long, making it difficult for the first side portion 22 to engage with the inner tooth surface.

[0232] 7 , in some embodiments, at least one of the thickness of the first side portion 22 and the thickness of the first side portion 23 is smaller than the thickness of the main portion 21 , that is, at least one of the third thickness H3 and the fourth thickness H4 is smaller than the sixth thickness H6 . Specifically, the first side portion 22 and the first side portion 23 are respectively connected to the two ends of the main flow portion 21, and the main flow portion 21 is connected to the spray rod 10. The main flow portion 21 serves as the main supporting structure of the nozzle 20. When the nozzle 20 is extended into the oral cavity, the clamping force between the first side portion 22 and the first side portion 23 and the teeth and the reaction force of the water column on the first side portion 22 and the first side portion 23 will be transmitted to the main flow portion 21. Therefore, the main flow portion 21 needs to have a certain structural strength to provide better support to the first side portion 22 and the first side portion 23 to avoid deformation of the main flow portion 21 under the action of force transmission, thereby causing the nozzle 20 to deform relative to the teeth, and the positions of the first nozzle 224 and the second nozzle 234 relative to the teeth are difficult to control, affecting the flushing effect of the first nozzle 224 and the second nozzle 234 on the tooth gaps.

[0233] As a preferred embodiment, the thickness of the first side portion 22 and the first side portion 23 are both thinner than that of the main portion 21. The smaller thickness of the first side portion 22 and the first side portion 23 makes them more susceptible to deformation. Specifically, when the first side portion 22 and the first side portion 23 are clamping teeth of different thicknesses, the smaller first side portion 22 and the first side portion 23 are more susceptible to deformation during contact with the teeth, moving away from each other to increase the gap between them, making it easier for the teeth to fit into the accommodating cavity 24 and adapting to the teeth of different users. Furthermore, when rinsing the teeth, the reaction force of the pulsed water jets ejected from the first nozzle 224 and the second nozzle 234 also makes it easier for the smaller first side portion 22 and the first side portion 23 to deform away from each other, preventing them from becoming too tightly attached to the teeth and causing the tooth surfaces to block the first nozzle 224 and the second nozzle 234.

[0234] Please continue to refer to Figure 7. In other embodiments, along the direction perpendicular to the first direction AA, that is, in the second direction BB, the main flow portion 21 has a sixth thickness H6, and the range of the sixth thickness H6 is 8mm≤H6≤14mm. The sixth thickness H6 within this range is beneficial for reducing the foreign body sensation in the oral cavity when the nozzle 20 is inserted into the oral cavity, facilitating the teeth to be stuck in the accommodating cavity 24, so that the nozzle 20 can avoid colliding with the teeth while cleaning the teeth.

[0235] Specifically, when the teeth are inserted into the accommodating cavity 24, if the sixth thickness H6 is greater than 14mm, the thickness of the nozzle 20 extending into the oral cavity will increase, making it easier for the user's teeth to collide with the nozzle 20. At the same time, the user's mouth will be opened more widely, which will require more effort, resulting in a stronger foreign body sensation in the mouth and difficulty in moving the nozzle 20 within the mouth, reducing the user's comfort during use. If the sixth thickness H6 is less than 8mm, the thickness of the nozzle 20 and the spray rod 10 will be too small, resulting in a smaller cross-section of the main channel 11. As a result, the amount of liquid transported per unit volume of the main channel 11 is less, and the amount of water sprayed by the first nozzle 224 and the second nozzle 234 is smaller, reducing the cleaning range of the teeth. At the same time, according to the principles of liquid mechanics, a smaller cross-section of the main channel 11 increases the flow rate of the liquid, thereby increasing the impact force of the pulsed water column formed by the first nozzle 224 and the second nozzle 234. This excessive impact force can easily damage the teeth and cause them to loosen.

[0236] In some embodiments, the connecting portion 121 includes a transition inner surface 212, the transition inner surface 212 is connected to the first inner side surface 222 and the second inner side surface 232, and the distance between the transition inner surface 212 and the first nozzle 224 and the first nozzle 234 in the second direction BB is greater than or equal to 3 mm. For example, the distance between the transition inner surface 212 and the first nozzle 224 and the first nozzle 234 in the second direction BB can be 3 mm, 4 mm, 5 mm, or 6 mm. When the nozzle 20 is clamped on the inner and outer tooth surfaces, the transition inner surface 212 and the first nozzle 224 are connected. The spacing between the opening 224 and the first nozzle 234 in the second direction BB is greater than or equal to 3 mm. The first nozzle 224 and the first nozzle 234 can extend under the teeth. On the one hand, it can meet the needs of the nozzle 20 to clean the gaps between teeth, thereby improving the cleaning effect of the nozzle 100. On the other hand, it can meet the needs of the nozzle 20 to clamp the inner and outer tooth surfaces of the teeth. When the nozzle 20 cleans the teeth, the nozzle 20 will not be detached from the teeth due to the failure of the accommodating cavity 24 to clamp the teeth, thereby improving the stability of the nozzle 20 clamping the teeth.

[0237] Please refer to Figures 6 and 7. In some embodiments, the difference between the first length L1 and the second length L2 is greater than or equal to 2 mm and less than or equal to 12 mm. For example, the difference between the first length L1 and the second length L2 can be 2 mm, 4 mm, 6 mm, 8 mm, 10 mm or 12 mm, and combined with the first length L1 being smaller than the second length L2, when the user needs to take the nozzle 20 out of the oral cavity, because the difference between the first length L1 and the second length L2 is greater than or equal to 2 mm and less than or equal to 12 mm, and combined with the first length L1 being smaller than the second length L2, it is not only easy for the nozzle 20 to detach from the teeth, but also the area of ​​teeth cleaning can be increased without damaging the gum area. If the difference between the first length L1 and the second length L2 is less than 2 mm, when the nozzle 20 needs to be taken out of the oral cavity, the nozzle 20 is difficult to separate from the inner and outer tooth surfaces of the teeth because the lengths of the first side portion 22 and the second side portion 23 in the second direction BB are relatively close; if the difference between the first length L1 and the second length L2 is greater than 12 mm, the length difference between the first side portion 22 and the second side portion 23 along the second direction BB is relatively large. When cleaning the teeth, because the first side portion 22 is shorter and the second side portion 23 is longer, it is easy to only clean the outer tooth surfaces of the teeth, or the second side portion 23 needs to be extended into contact with the gums so that the first side portion 22 can clean the roots of the tooth gaps on the inner tooth surfaces, which can easily cause gum damage.

[0238] Please continue to refer to Figures 6 and 7. In some embodiments, the first length L1 and the second length L2 are both less than or equal to 8 mm. For example, the first length L1 and the second length L2 can be 4 mm, 6 mm, 7 mm, or 8 mm, which are more suitable for inserting into the oral cavity to clean the teeth. This can avoid cleaning the gum area and can also make it easier for the nozzle 20 to be separated from the teeth. It should be noted that the first length L1 and the second length L2 are different values, and the first length L1 is less than the second length L2. If the length of any one of the first length L1 and the second length L2 is greater than 8 mm, the user needs to insert the free ends of the first side portion 22 and the second side portion 23 into the gum area when using the water flosser 1000, causing gum damage. When the nozzle 20 is clamped by the teeth, because the first length L1 and the second length L2 are too long, it is not conducive to the nozzle 20 to slide smoothly in the oral cavity and deform, making it difficult to remove the nozzle 20.

[0239] Referring to FIG. 6, in some embodiments, the first length L1 is less than or equal to 6 mm and greater than or equal to 3 mm. For example, the first length L1 can be 6 mm, 5 mm, 4 mm, or 3 mm. Designing the first length L1 to be less than or equal to 6 mm and greater than or equal to 3 mm can, on the one hand, effectively clean the interdental spaces, and on the other hand, prevent the nozzle 20 from getting stuck in the interdental spaces. If the first length L1 is less than 3 mm, during the process of inserting the tooth into the receiving cavity 24 of the nozzle 20, due to the short length of the first side portion 22, there is a possibility that the first side portion 22 cannot reach the interdental position on the inner tooth surface, resulting in the inability to effectively clean the interdental spaces on the inner tooth surface and a decrease in the cleaning efficiency of the oral irrigator 1000. If the first length L1 is greater than 6 mm, during the process of inserting the tooth into the receiving cavity 24 of the nozzle 20, the first side portion 22 is likely to be stuck by the inner tooth surface of the tooth and the inner wall of the oral cavity, which is not conducive to the removal of the nozzle 20.

[0240] Referring to FIGS. 22 - 23, in some embodiments, the distance between the first nozzle 224 and the bottom of the receiving cavity 24 is L4, that is, the distance from the first nozzle 224 to the transitional inner surface 212 is L4. The length of the first side portion 22 is L1, that is, the length L1 of the first side portion 22 is the same as the above-mentioned first length L1. Among them, 0.7 ≤ L4 / L1 < 1, that is, L4 < L1. Specifically, along the length direction of the first side portion 22, the first nozzle 224 is located on the side closer to the main flow portion 21 of the free end of the first side portion 22. Thus, when its free end bends and extends towards the first side portion 23, along the length direction of the main flow portion 21, there is a certain distance between the end face of the free end of the first side portion 22 and the first nozzle 224. Therefore, when the free end holds the tooth, whether the first side portion 22 is in a natural state or a deformed state, this distance can ensure that there is a certain gap between the tooth surface and the first nozzle 224, which can prevent the tooth surface from closely adhering to the first nozzle 224 and blocking the first nozzle 224, making it difficult for the first nozzle 224 to spray out a water column or for the residue in the interdental space to fall off from the tooth surface. At the same time, L4 < L1 can prevent the first nozzle 224 from being set too high, resulting in the water column it sprays hitting the gums and causing gum damage.

[0241] And L4 should be greater than 0.7L1, that is, the position of the first nozzle 224 from the end face of the free end of the first side portion 22 should not be too far, to ensure that when the free end of the first side portion 22 holds the tooth, the pulsed water column sprayed by the first nozzle 224 can冲向牙齿牙缝的中上部 (be directed towards the upper-middle part of the tooth interdental space). Because generally food residues are stuck in the upper-middle part of the interdental space. If the position of the first nozzle 224 from the end face of the free end of the first side portion 22 is too far, the height of the water column sprayed by the first nozzle 224 is not enough to wash the upper-middle part of the interdental space, thus unable to wash down the residue and reducing the cleaning effect of the oral irrigator 1000.

[0242] Please continue to refer to Figures 22-23. It can be understood that the second nozzle 234 can be set in the same way as the first nozzle 224. The distance between the second nozzle 234 and the bottom of the accommodating chamber 24 is L5, and the length of the first side portion 23 is L2. That is, the distance between the second nozzle 234 and the bottom of the accommodating chamber 24 is L5, which is the same as the distance from the above-mentioned second nozzle 234 to the transition inner surface 212. The length L5 of the second side portion 23 is the same as the above-mentioned second length L2, 0.7≤L5 / L2<1, to ensure that the second nozzle 234 is not too close or too far from the end face position of the free end of the first side portion 23, to avoid the tooth surface being close to the second nozzle 234 and thus blocking the second nozzle 234, and at the same time to avoid the second nozzle 234 being set too high, causing the water column sprayed therefrom to impact the gums and cause gum damage; ensure that the water column sprayed from the second nozzle 234 is directed toward the middle and upper part of the teeth, which is conducive to rinsing away the residue in the gaps between the teeth.

[0243] In one embodiment, a portion of the first side portion 22 close to the mainstream portion 21 is perpendicular to the mainstream portion 21, a portion of the first side portion 22 away from the mainstream portion 21 is bent toward the second side portion 23, a portion of the second side portion 23 close to the mainstream portion 21 is perpendicular to the mainstream portion 21, and a portion of the second side portion 23 away from the mainstream portion 21 is bent toward the first side portion 22.

[0244] The first side portion 22, the second side portion 23 and the main stream portion 21 are jointly arranged to form an accommodating chamber 24. The first side portion 22 has a free end and a connecting end, the connecting end of which is connected to the main stream portion 21, and the free end of which is bent toward the second side portion 23. Similarly, the second side portion 23 has a free end and a connecting end, the connecting end of which is connected to the main stream portion 21, and the free end of which is bent toward the first side portion 22. Therefore, the open end of the accommodating chamber 24 forms a closed shape. When the teeth are stuck in the accommodating chamber 24, the free ends of the first side portion 22 and the second side portion 23 are respectively bent in the direction close to the teeth, playing the role of clamping the teeth. When flushing, the relative stability between the nozzle 20 and the teeth is improved, and the teeth are prevented from being separated from the accommodating chamber 24 under the reaction force of the pulsed water column, which helps to protect the teeth and prevent them from loosening, and is conducive to flushing fixed positions to enhance the cleaning effect.

[0245] 5 , in some embodiments, the first nozzle 224 and the second nozzle 234 are not disposed opposite each other in the first direction AA, and the first nozzle 224 is disposed near the free end of the first side portion 22 , while the second nozzle 234 is disposed near the free end of the second side portion 23 .

[0246] Specifically, the first nozzle 224 and the second nozzle 234 have different cleaning ranges on the inner and outer tooth surfaces, thereby expanding the cleaning range of the tooth irrigator 1000 and improving cleaning efficiency. Preferably, the first nozzle 224 and the second nozzle 234 are located near the free end. When the pulsed water jets clean the inner and outer tooth surfaces, the first side portion 22 and the second side portion 23 are more likely to deform, thereby preventing the first nozzle 224 and the second nozzle 234 from clogging.

[0247] In some embodiments, the first nozzle 224 and the second nozzle 234 are arranged opposite each other in the first direction AA. When cleaning the teeth, since the first nozzle 224 and the second nozzle 234 are arranged opposite each other, the first nozzle 224 and the second nozzle 234 can clean the same tooth gap or tooth surface at the same time, so that the forces exerted by the first nozzle 224 and the second nozzle 234 on the inner and outer tooth surfaces of the teeth or tooth gaps offset each other, thereby avoiding damage to the gums due to excessive force on one side of the teeth or tooth gaps, thereby protecting the gums from damage.

[0248] In some other embodiments, the first nozzle 224 and the second nozzle 234 are staggered along the second direction BB. When cleaning the teeth, the staggered arrangement of the first nozzle 224 and the second nozzle 234 increases the cleaning area of ​​the inner tooth surface by the first nozzle 224 and the outer tooth surface by the second nozzle 234, thereby improving the cleaning efficiency.

[0249] 5 , in some embodiments, the first nozzle 224 and the second nozzle 234 are both disposed toward the accommodating cavity 24 , and along the first extending direction AA, the first nozzle 224 and the second nozzle 234 are not disposed facing each other.

[0250] Specifically, the main channel 211 is connected to the first channel 221 and the first nozzle 224, and the main channel 211 is also connected to the second channel 231 and the second nozzle 234. It can be understood that the main channel 211 diverts the liquid received from the spray rod channel 11 to the first channel 221 in the first side portion 22 and the second channel 231 in the second side portion 23, and the first nozzle 224 and the second nozzle 234 are both arranged toward the accommodating cavity 24, that is, the first side portion 22 and the second side portion 23 are arranged relative to each other, and the nozzle 20 can clamp the inner and outer tooth surfaces of the teeth, and the first nozzle 224 and the second nozzle 234 can spray pulsed water jets to achieve tooth cleaning. The first inner side surface 222 and the second inner side surface 232 can be flat or curved, and this embodiment of the application is not limited to this.

[0251] It should be noted that the first extension direction AA can be parallel to or angled with the length direction of the spray bar 11. The present application does not specifically limit the first extension direction AA and the length direction of the spray bar 11, and the first extension direction AA is the same as the above-mentioned first direction AA, and the second extension direction BB is the same as the above-mentioned second direction BB.

[0252] Furthermore, the first nozzle 224 and the second nozzle 234 can be arranged non-oppositely along the first extension direction AA. It can be understood that when the nozzle 20 is inserted into the oral cavity to clean the teeth, the first nozzle 224 and the second nozzle 234 are staggered along the first extension direction AA, that is, the liquid sprayed from the first nozzle 224 and the liquid sprayed from the second nozzle 234 do not overlap in the first extension direction AA, and the first nozzle 224 and the second nozzle 234 have a larger cleaning area for the teeth, that is, the first nozzle 224 and the second nozzle 234 can clean different parts of the teeth at the same time, thereby improving the cleaning efficiency of the water flosser 1000 on the teeth.

[0253] Please refer to Figure 24. In some embodiments, when projected along the first extension direction AA, the projection of the first nozzle 224 and the projection of the second nozzle 234 do not at least partially overlap in the second extension direction BB. It can be understood that the first nozzle 224 and the second nozzle 234 can be staggered in the second extension direction BB. When the nozzle 20 is extended into the oral cavity to clean the teeth, the first nozzle 224 and the second nozzle 234 are staggered in the second extension direction BB, that is, the water column sprayed by the first nozzle 224 and the water column sprayed by the second nozzle 234 can clean different teeth at the same time, so that the cleaning area of ​​the nozzle 20 for the teeth is increased, and the first nozzle 224 and the second nozzle 234 can be extended into the teeth to clean the gaps between the teeth. In this way, the cleaning area of ​​the water flosser 1000 is increased, thereby improving the cleaning efficiency of the water flosser 1000 for the teeth.

[0254] Please continue to refer to Figure 24. Further, in some embodiments, the projection of the first nozzle 224 and the projection of the second nozzle 234 are spaced apart in the second extension direction BB, that is, the first nozzle 224 and the second nozzle 234 are staggered in the second extension direction BB, so that the projection of the first nozzle 224 and the projection of the second nozzle 234 are spaced apart in the second extension direction BB. Therefore, when the nozzle 20 cleans the gaps between teeth, the water column sprayed from the first nozzle 224 and the water column sprayed from the second nozzle 234 are not on the same straight line, that is, the nozzle 20 cleans different gaps between teeth at the same time, thereby improving the cleaning effect of the water flosser 1000 on teeth.

[0255] Please continue to refer to Figure 24. Furthermore, in some other embodiments, the distance d3 between the projection of the first nozzle 224 and the projection of the second nozzle 234 in the second extension direction BB is less than or equal to 5 mm. For example, the distance d3 between the projection of the first nozzle 224 and the projection of the second nozzle 234 in the second extension direction BB can be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm. The distance d3 between the projection of the first nozzle 224 and the projection of the second nozzle 234 in the second extension direction BB is designed to be less than or equal to 5 mm. It can be understood that, on the basis of satisfying the staggered setting of the first nozzle 224 and the second nozzle 234, the length of the first side portion 22 and the second side portion 23 will not be too long, and is in line with the length adapted to the human oral cavity. When the nozzle 20 is inserted into the oral cavity to clean the teeth, there will be no strong foreign body sensation in the oral cavity. In this way, the comfort of the water flosser 1000 for cleaning teeth is improved.

[0256] When the distance d3 between the projection of the first nozzle 224 and the projection of the second nozzle 234 in the second extension direction BB is greater than 5 mm, the distance between the first nozzle 224 and the second nozzle 234 in the second extension direction BB is large, which will cause the length of the first side portion 22 and the second side portion 23 to be longer, that is, the overall length of the nozzle 20 is longer. When the water flosser 1000 is inserted into the oral cavity, due to the long lengths of the first side portion 22 and the second side portion 23, the teeth may easily block the water flosser 1000, making it difficult for the water flosser 1000 to be inserted into the oral cavity for cleaning the teeth, or difficult to remove the water flosser 1000 from the oral cavity. In particular, when the first side portion 22 and the second side portion 23 are longer, the water flosser 1000 may be blocked by the teeth. When the lengths of one side portion 22 and the second side portion 23 are inconsistent, for example, in the second extension direction BB, the length of the first side portion 22 is smaller than the length of the second side portion 23. Since the projection of the first nozzle 224 and the projection of the second nozzle 234 in the second extension direction BB are spaced relatively large, when the second nozzle 234 of the second side portion 23 is blocked by the teeth and does not extend under the teeth, the first nozzle 224 of the first side portion 22 may not be able to clean the tooth surface. That is, the water column ejected from the first nozzle 224 of the first side portion 22 can be sprayed toward the inner wall of the oral cavity unimpeded, causing damage to the inner wall of the oral cavity and posing certain safety hazards.

[0257] Please refer to Figure 25. In some embodiments, the projection of the first nozzle 224 and the projection of the second nozzle 234 do not overlap at least partially in the third direction CC. It can be understood that the first nozzle 224 and the second nozzle 234 are on the left and right sides of the third direction CC. At this time, the first nozzle 224 and the second nozzle 234 are staggered. When the nozzle 20 cleans the gaps between the teeth, because the projection of the first nozzle 224 and the projection of the second nozzle 234 do not overlap at least partially in the third direction CC, the first nozzle 224 and the second nozzle 234 can clean the tooth surfaces while cleaning the gaps between the teeth, so that the nozzle 20 can more comprehensively clean the dental plaque on the teeth, thereby improving the cleaning effect of the water flosser 1000 on the teeth.

[0258] Please continue to refer to Figure 25. Further, in some embodiments, the projection of the first nozzle 224 and the projection of the second nozzle 234 are spaced apart in the third direction CC, that is, the first nozzle 224 and the second nozzle 234 are staggered in the third direction CC, so that the projection of the first nozzle 224 and the projection of the second nozzle 234 are spaced apart in the third direction CC. Therefore, when the nozzle 20 cleans the gaps between the teeth, the water columns sprayed from the first nozzle 224 and the second nozzle 234 can clean the tooth surfaces of the teeth. At the same time, when the nozzle 20 moves back and forth along the extension direction of the teeth, it can be more biased towards the water flosser 1000 to more comprehensively clean the dental plaque on the tooth surfaces, thereby improving the cleaning effect of the water flosser 1000 on the teeth.

[0259] Please continue to refer to Figure 25. In some other embodiments, the distance d4 between the projection of the first nozzle 224 and the projection of the second nozzle 234 in the third direction CC is less than or equal to 5 mm. For example, the distance d4 between the projection of the first nozzle 224 and the projection of the second nozzle 234 in the third direction CC can be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm. Since the distance d4 between the projection of the first nozzle 224 and the projection of the second nozzle 234 in the third direction CC is less than or equal to 5 mm, the width of the first side portion 22 and the second side portion 23 in the third direction CC is more suitable for extending into the oral cavity, which can avoid a strong foreign body sensation in the oral cavity, thereby improving the comfort of the oral irrigator 1000.

[0260] When the distance d4 between the projection of the first nozzle 224 and the projection of the second nozzle 234 in the third direction CC is greater than 5 mm, the width of the first side portion 22 and the second side portion 23 in the third direction CC needs to be made larger to meet the requirement that the distance d4 between the projection of the first nozzle 224 and the projection of the second nozzle 234 in the third direction CC is greater than 5 mm. At this time, it is easy to cause the overall width of the nozzle 20 to be wider. When the nozzle 20 is inserted into the oral cavity to clean the teeth, due to the larger width of the first side portion 22 and the second side portion 23 in the third direction CC, the contact area between the first side portion 22 and the second side portion 23 and the inner wall of the oral cavity is increased, resulting in a strong foreign body sensation.

[0261] Please refer to Figure 26. In some embodiments, the projection of the first nozzle 224 and the projection of the second nozzle 234 in the second extension direction BB and the third direction CC are at least partially non-overlapping. It can be understood that the first nozzle 224 and the second nozzle 234 are staggered in the second extension direction BB and the third direction CC. When the nozzle 20 is extended into the oral cavity to clean the teeth, since the first nozzle 224 and the second nozzle 234 are staggered in the second extension direction BB and the third direction CC, the first nozzle 224 and the second nozzle 234 can clean the tooth surface of the same tooth, as well as the tooth surfaces and tooth gaps of adjacent teeth, thereby improving the cleaning efficiency of the water flosser 1000 on the teeth.

[0262] Please continue to refer to Figure 26. Further, in some embodiments, the projection of the first nozzle 224 and the projection of the second nozzle 234 are spaced apart in the second extension direction BB and the third direction CC, that is, the first nozzle 224 and the second nozzle 234 are staggered in the second extension direction BB and the third direction CC, so that the projection of the first nozzle 224 and the projection of the second nozzle 234 are spaced apart in the second extension direction BB and the third direction CC. Therefore, when the nozzle 20 cleans the teeth, the first nozzle 224 and the second nozzle 234 can spray to clean the tooth surface and tooth gap above and below the same tooth, and can also clean the tooth gap area of ​​adjacent teeth, so as to increase the cleaning area of ​​the teeth by the nozzle 20, thereby improving the cleaning efficiency of the water flosser 1000 on the teeth.

[0263] In some embodiments, based on the projection along the first extension direction AA, the projection of the first nozzle 224 and the projection of the second nozzle 234 in the third direction CC at least partially do not overlap, the center plane of the first side portion 22 and the center plane of the second side portion 23 are coplanar, so that the first side portion 22 and the second side portion 23 are arranged opposite each other. It can be understood that the first side portion 22 and the second side portion 23 share the same center plane. At this time, the first side portion 22 and the second side portion 23 are respectively arranged at both ends of the connecting portion 121 and are relatively symmetrical. When the user needs to remove the nozzle 20 from the oral cavity, because the first side portion 22 and the second side portion 23 are relatively symmetrical, the accommodating cavity 24 has a larger space, which is not easy to cause squeezing on the inner and outer tooth surfaces of the teeth, making it easy for the water flosser 1000 to be removed from the oral cavity, thereby avoiding the water flosser 1000 from being stuck with the teeth.

[0264] Furthermore, in some other embodiments, along the first extension direction AA, the first side portion 22 and the second side portion 23 are not arranged opposite each other, and the first nozzle 224 is arranged at the middle of the first inner side surface 222 in the third direction CC, and the second nozzle 234 is arranged at the middle of the second inner side surface 232 in the third direction CC. It can be understood that the first side portion 22 and the second side portion 23 are staggered along the first extension direction AA. At this time, because the first side portion 22 and the second side portion 23 are staggered, when the first nozzle 224 is arranged at the middle of the first inner side surface 222 in the third direction CC, the second nozzle 234 is arranged at the middle of the second inner side surface 232 in the third direction CC. When the second inner surface 232 is in the middle in the third direction CC, the first nozzle 224 and the second nozzle 234 are also staggered, and the first nozzle 224 and the second nozzle 234 are both arranged in the middle of their respective inner surfaces in the third direction CC, so that the width of the nozzle 20 in the third direction CC is relatively uniform, and suitable for extending into the oral cavity to reduce the first side portion 22 and the width of the first side portion 22 in the third direction CC, thereby reducing the contact area between the first side portion 22 and the second side portion 23 and the inner wall of the oral cavity, thereby avoiding a strong foreign body sensation between the first side portion 22 and the second side portion 23 and the inner wall of the oral cavity.

[0265] In some embodiments, the nozzle 20 is a soft rubber part and is projected along the first extension direction AA. The projection of the first nozzle 224 and the projection of the second nozzle 234 are arranged at intervals in the second extension direction BB, and the first nozzle 224 is arranged near the free end of the first side portion 22, and in the second extension direction BB, the second nozzle 234 is arranged closer to the middle of the second inner side surface 232 than the first nozzle 224.

[0266] Specifically, the nozzle 20 is a soft rubber part, that is, when the user moves the spray rod 10, the first side portion 22 and the second side portion 23 can be deformed, and because the first side portion 22 is shorter than the second side portion 23, the deformation force applied to the first side portion 22 will be smaller than the deformation force applied to the second side portion 23. However, the first nozzle 224 is arranged close to the free end of the first side portion 22, and the second nozzle 234 is closer to the middle of the second inner side surface 232 than the first nozzle 224. When the inner and outer tooth surfaces of the teeth are rinsed with a pulsed water column, because the first nozzle 224 is arranged at the free end of the first side portion 22, the first side portion 22 can be more easily deformed, thereby improving the deformation ability of the first side portion 22.

[0267] Please refer to Figure 12. In some embodiments, the spray bar flow channel 11 has a water outlet 111 for communicating with the main channel 211. In the first extension direction AA, the water outlet 111 is closer to the second side portion 23 than the first side portion 22, so that the distance from the water outlet 111 to the first nozzle 224 is equal to the distance from the water outlet 111 to the second nozzle 234. It can be understood that since the length of the first side portion 22 is less than the length of the second side portion 23, if the distance from the water outlet 111 to the first side portion 22 is equal to the distance from the second side portion 23, at this time, the first nozzle 224 may be discharged before the second nozzle. 234 sprays out a water column, but the liquid in the second nozzle 234 still flows in the second flow channel 231, which can easily cause uneven force on the teeth or the gaps between the teeth, resulting in damage to the teeth or the gaps between the teeth. Therefore, the water outlet 111 is designed to be closer to the second side portion 23 than the first side portion 22, so that the distance from the water outlet 111 to the first nozzle 224 is equal to the distance from the water outlet 111 to the second nozzle 234, that is, the first nozzle 224 and the second nozzle 234 can spray water columns to clean the teeth at the same time. In this way, it can not only protect the teeth, but also improve the cleaning efficiency of the nozzle 100 on the teeth.

[0268] Referring to FIG. 23 , in some embodiments, the first nozzle 224 and the second nozzle 234 are both oriented toward the accommodating cavity 24 , and at least one of the central axis 225 of the first nozzle or the central axis 235 of the second nozzle is disposed at an angle to both the first direction AA and the second direction BB. For example, when the central axis 112d of the first nozzle is disposed at an angle to both the first direction AA and the second direction BB, that is, the first nozzle 224 can be tilted, and the direction of the tilt angle is away from the main flow portion 21 . In this case, when the first nozzle 224 cleans the inner tooth surface, it not only cleans the teeth but also the roots of the tooth gaps, thereby improving the cleaning effect. Furthermore, when manufacturing the nozzle head 20 , because the first nozzle 224 is tilted, the designer can demold the first flow channel 221 along the tilt direction of the first nozzle 224 , thereby facilitating demolding of the first flow channel 221 mold.

[0269] Furthermore, in some embodiments, the center dividing plane of the first side portion 22 is coplanar with the center dividing plane of the second side portion 23, and the center axis 225 of the first nozzle and the center axis 235 of the second nozzle are both parallel to the center dividing plane. It can be understood that the center dividing plane can pass through or cut through the first nozzle 224 and the second nozzle 234 at the same time, and the center axis 225 of the first liquid spraying port and the center axis 235 of the second liquid spraying port are both parallel to the center dividing plane, that is, the first nozzle 224 and the second nozzle 234 are vertically arranged in the third direction CC. At this time, the water columns sprayed from the first nozzle 224 and the second nozzle 234 can be used to clean the gaps between the teeth, thereby improving the cleaning effect of the nozzle 100.

[0270] If the central axis 225 of the first liquid spray port and the central axis 235 of the second liquid spray port are not parallel to the median plane, since the tooth gap is located between adjacent teeth and the first nozzle 224 and the second nozzle 234 are inclined in the third direction CC, it is easy for the water columns sprayed from the first nozzle 224 and the second nozzle 234 to be blocked by the tooth surface, resulting in the nozzle head 20 being unable to clean the tooth gap, resulting in a reduced cleaning effect of the nozzle 100.

[0271] Please continue to refer to Figure 23. Further, in some embodiments, the central axis 225 of the first nozzle has a first angle α1 with the second direction BB, and the central axis 235 of the second nozzle has a second angle α2 with the second direction BB. The first angle α1 is less than or equal to the second angle α2. That is, the inclination angles of the first nozzle 224 and the second nozzle 234 are different, and because the first side portion 22 is used to clean the inner tooth surface and the second side portion 23 is used to clean the outer tooth surface, at this time, the intersection of the central axis 225 of the first nozzle and the central axis 235 of the second nozzle will be closer. The second side portion 23, combined with the first length L1 being shorter than the second length L2, and the first side portion 22 being shorter, has the first angle α1 being smaller than the second angle α2. This not only increases the cleaning area of ​​the inner tooth surface by the first nozzle 224, but also prevents the first nozzle 224 from cleaning the inner gums. Furthermore, because the second side portion 23 is longer than the first side portion 22, the second angle α2 is designed to be greater than the first angle α1. That is, the inclination angle of the second nozzle 234 is smaller than that of the first nozzle 224. This prevents the second nozzle 234 from cleaning the outer gums. If the first angle α1 were greater than the second angle α2, the intersection of the central axis 225 of the first nozzle and the central axis 235 of the second nozzle would be closer to the first side portion 22, that is, closer to the inner tooth surface, making it easier to clean the gums and cause gum damage.

[0272] Please continue to refer to Figure 23. Furthermore, in some embodiments, the first angle α1 and the second angle α2 are both greater than or equal to 45 degrees and less than or equal to 90 degrees. For example, the first angle α1 and the second angle α2 can be 45 degrees, 65 degrees, 75 degrees and 90 degrees. Designing the first angle α1 and the second angle α2 to be within the range of 45 degrees to 90 degrees can not only achieve comprehensive cleaning of the inner and outer tooth gaps, but also increase the cleaning area. If the first angle α1 and the second angle α2 are both less than 45 degrees, the inclination angles of the first nozzle 224 and the second nozzle 234 are small, and the inclination angles of the water columns sprayed from the first nozzle 224 and the second nozzle 234 are small, resulting in the gums on the inner tooth surface and the outer tooth surface being easily cleaned, causing damage to the gums. If the first angle α1 and the second angle α2 are both greater than 90 degrees, at this time, the inclination direction of the first nozzle 224 is set toward the main stream 21, and the inclination direction of the second nozzle 234 is also set toward the main stream 21. It can be understood that at this time, the first nozzle 224 and the second nozzle 234 are cleaning toward the top of the teeth, which reduces the tooth cleaning area and reduces the cleaning effect.

[0273] Furthermore, in some embodiments, projection is performed along the first extension direction AA, and the projection of the first nozzle 224 and the projection of the second nozzle 234 are spaced apart, and the distance between the projection of the first nozzle 224 and the projection of the second nozzle 234 is less than or equal to 3 mm. For example, the distance between the projection of the first nozzle 224 and the projection of the second nozzle 234 can be 1 mm, 2 mm, or 3 mm. When the nozzle 20 is used to clean the teeth, the length of the first side portion 22 is less than the length of the second side portion 23. It can be understood that the first nozzle 224 will spray water before the second nozzle 234, thereby cleaning the inner tooth surface. However, because the distance between the projection of the first nozzle 224 and the projection of the second nozzle 234 is small, the second nozzle 234 can also spray water faster, thereby achieving the mutual offset of the forces exerted by the first nozzle 224 and the second nozzle 234 on the inner and outer tooth surfaces of the same tooth or tooth gap, thereby avoiding excessive force on one side of the tooth or tooth gap, resulting in damage to the tooth, thereby protecting the tooth. When the distance between the projection of the first nozzle 224 and the projection of the second nozzle 234 is greater than 3 mm, it is possible that the first nozzle 224 has cleaned the inner tooth surface of the tooth, but the liquid in the second nozzle 234 is still flowing in the second flow channel 231, which may easily cause uneven force on the teeth or the gaps between teeth, resulting in damage to the teeth or the gaps between teeth.

[0274] Please continue to refer to Figure 23. In some embodiments, the aperture d5 of the first nozzle and the aperture d6 of the second nozzle are both greater than or equal to 0.4 mm and less than or equal to 0.7 mm. For example, the aperture d5 of the first nozzle and the aperture d6 of the second nozzle can be 0.4 mm, 0.5 mm, 0.6 mm, or 0.7 mm. If the aperture d5 of the first nozzle and the aperture d6 of the second nozzle are less than 0.4 mm, the water jet of the water flosser 1000 is ejected in a pulsed manner. Since the aperture d5 of the first nozzle and the aperture d6 of the second nozzle are both smaller, the pressure of the water jets ejected from the first nozzle 224 and the second nozzle 234 is greater. In particular, when used by users with fragile teeth, , which is more likely to cause damage to the gums; if the aperture d5 of the first nozzle and the aperture d6 of the second nozzle are greater than 0.7mm, the aperture d5 of the first nozzle and the aperture d6 of the second nozzle are both large, and it is difficult for the first nozzle 224 and the second nozzle 234 to form a high-pressure water column, resulting in some highly sticky dirt in the teeth being difficult to be cleaned, resulting in a decrease in the cleaning effect. Therefore, it is necessary to design the aperture d5 of the first nozzle and the aperture d6 of the second nozzle to be greater than or equal to 0.4mm and less than or equal to 0.7mm. When the first nozzle 224 and the second nozzle 234 spray water columns to clean the inner and outer teeth, it can avoid damaging the gums and clean the dirt that is difficult to clean in the teeth.

[0275] Please continue to refer to Figure 23. In some embodiments, along the first direction AA, the distance d7 between the first inner side surface 222 and the second inner side surface 232 is greater than or equal to 8 mm and less than or equal to 14 mm, that is, the distance d7 of the accommodating cavity 24 is greater than or equal to 8 mm and less than or equal to 14 mm. For example, the distance d7 between the first inner side surface 222 and the second inner side surface 232 can be 8 mm, 10 mm, 12 mm, or 14 mm. When the distance d7 between the first inner side surface 222 and the second inner side surface 232 is less than 8 mm, the first inner side surface 222 and the second inner side surface 232 will clamp the teeth too tightly, thereby weakening the deformation ability of the first side portion 22 and the second side portion 23. When the distance d7 between the first inner side surface 222 and the second inner side surface 232 is greater than 14 mm, the size of the accommodating cavity 24 of the nozzle 20 will be too large. When the nozzle 20 is placed in the user's mouth, the first side portion 22 and the second side portion 23 will be stuck between the tooth surface and the inner wall of the mouth, which is likely to produce a strong foreign body sensation. Therefore, the distance d7 between the first inner side surface 222 and the second inner side surface 232 is designed to be greater than or equal to 8 mm and less than or equal to 14 mm. This distance d7 range is more in line with the size of human teeth, which not only improves the deformation ability of the first side portion 22 and the second side portion 23, but also avoids the strong foreign body sensation between the first side portion 22 and the second side portion 23 and the inner wall of the mouth.

[0276] In some embodiments, the spray rod 10 has a first axis 15 along a first direction AA, and there are multiple connecting lines between the first nozzle 224 and the second nozzle 234, at least one connecting line is in the same plane as the first axis 15, and the connecting line can be a straight line or a curve. It can be understood that the plane can pass through or cut through the first nozzle 224 and the second nozzle 234 at the same time, so that the first nozzle 224 and the second nozzle 234 are at least facing or completely facing each other. At this time, the first nozzle 224 and the second nozzle 234 can clean the tooth surface or tooth gap of the same tooth at the same time, so that the forces exerted by the first nozzle 224 and the second nozzle 234 on the inner and outer tooth surfaces of the same tooth or tooth gap offset each other, avoiding excessive force on one side of the tooth or tooth gap, causing damage to the tooth, thereby protecting the teeth.

[0277] Please continue to refer to Figure 23. In some embodiments, due to the presence of the main flow section 21, the top surface of the teeth can be pressed against the transition inner surface 212 of the main flow section 21 to improve the positional stability between the nozzle 20 and the teeth during the cleaning process. The height of the first inner side surface 222 and the second inner side surface 232 relative to the transition inner surface 212 can be designed so that when the top surface of the teeth is pressed against the transition inner surface 212, the first inner side surface 222 and the second inner side surface 232 do not contact the gums, thereby avoiding gum damage or discomfort. Specifically, the transition inner surface 212 can be a plane or a curved surface. In some specific embodiments, the main flow section 21 and the first side portion 22 and the second side portion 23 are smoothly connected. In this way, on the one hand, food residues flushed from the teeth can be prevented from getting stuck at the corner connection between the transition inner surface 212 and the first inner side surface 222 and the second inner side surface 232. On the other hand, it can avoid scratching the user's mouth due to the corner connection being too sharp.

[0278] Please refer to FIG6 and FIG23. In some embodiments, based on the nozzle 20 being an elastic member, along the second direction BB, the ratio of the distance between the first nozzle 224 and the main flow portion 21 to the first length L1 is greater than 2 / 3, and the ratio of the distance between the first nozzle 224 and the main flow portion 21 to the second length L2 is greater than 2 / 3. It can be understood that the first nozzle 224 and the second nozzle 234 can be arranged closer to the free ends of the first side portion 22 and the second side portion 23. When the first nozzle 22 When the first nozzle 224 and the second nozzle 234 are in contact with the inner tooth surface and the second nozzle 234 is in contact with the outer tooth surface, the first nozzle 224 and the second nozzle 234 are easily clogged. By arranging the first nozzle 224 and the second nozzle 234 closer to the free ends of the first side portion 22 and the second side portion 23, when the first nozzle 224 and the second nozzle 234 spray water jets, the first side portion 22 and the second side portion 23 are more likely to deform under the reaction force of the water jets, thereby improving the deformation capacity of the nozzle head 20.

[0279] Please refer to Figure 27. In some other embodiments, the first side portion 22 has a first width W1 along the third direction CC, and the second side portion 23 has a second width W2 along the third direction CC, wherein the third direction CC is perpendicular to the first direction AA and the second direction BB, wherein the first width W1 is smaller than the second width W2. It can be understood that because the first length L1 is smaller than the second length L2, that is, along the second direction BB, the length of the first side portion 22 is smaller than the length of the second side portion 23, the deformation ability of the first side portion 22 will be worse than the deformation ability of the second side portion 23. In this case, the first width W1 can be designed to be smaller than the second width W2, that is, the first side portion 22 is narrower than the second side portion 23. In this way, the deformation ability of the first side portion 22 can be improved.

[0280] Please continue to refer to Figure 27. Furthermore, in some other embodiments, the first width W1 and the second width W2 gradually decrease along the second direction BB and in the direction away from the main flow portion 21. That is, in the process of inserting the tooth into the accommodating cavity 24, the closer to the gum of the tooth, the smaller the contact area between the first side portion 22 and the second side portion 23 and the gum part of the tooth. When cleaning the teeth, the first side portion 22 and the second side portion 23 gradually become narrower, so that the deformation performance of the first side portion 22 and the second side portion 23 is increased. In this way, not only can the foreign body sensation in the oral cavity be reduced, but also the deformation performance of the first side portion 22 and the second side portion 23 can be increased.

[0281] Please refer to Figures 7 and 27. Furthermore, in some embodiments, the third thickness H3 and the fourth thickness H4 gradually decrease along the second direction BB and in the direction away from the main flow portion 21, and the first width W1 and the second width W2 also gradually decrease along the second direction BB and in the direction away from the main flow portion 21. In the process of inserting the tooth into the accommodating cavity 24, the first width W1 and the third thickness H3 of the first side portion 22 decrease along the second direction BB and in the direction away from the main flow portion 21, and the second width W2 and the fourth thickness H4 of the second side portion 23 decrease along the second direction BB and in the direction away from the main flow portion 21. That is, the closer the first side portion 22 and the second side portion 23 are to the gum area, the thinner and narrower the first side portion 22 and the second side portion 23 become. In this way, it is easy for the nozzle 20 to be inserted into the tooth and the foreign body sensation in the mouth can be reduced.

[0282] In some embodiments, the cross-sectional area of ​​at least the end portion of the first side portion 22 in the width direction gradually decreases from the connection end to the free end of the first side portion 22, and the cross-sectional area of ​​at least the end portion of the second side portion 23 in the width direction gradually decreases from the connection end to the free end of the second side portion 23. In actual use, the user holds the spray wand 10 with the spray head 20 facing one side of the body, places the spray head 20 into the mouth, and then engages the tooth into the receiving cavity 24. The user cannot observe this process with their eyes and can only operate it blindly by feeling. By reducing the cross-sectional area of ​​at least the end portions of the first side portion 22 and the second side portion 23, the overall volume of the spray head 20 extending into the mouth is effectively reduced, reducing the foreign body sensation in the user's mouth. At the same time, due to the smaller cross-sectional area of ​​the end portions of the first side portion 22 and the second side portion 23 extending into the mouth, the first side portion 22 and the second side portion 23 have a larger space to move relative to each other in the mouth, effectively avoiding collision with the tooth and facilitating the user to engage the tooth into the receiving cavity 24 blindly.

[0283] It should be noted that the width direction of the first side portion 22 and the second side portion 23 is the same as the third direction CC mentioned above.

[0284] In some embodiments, the cross-sectional area of ​​the first side portion 22 in its width direction gradually decreases, which is different from the above-mentioned cross-sectional area of ​​at least the end portion of the first side portion 22 gradually decreasing in its width direction in that: along the length direction of the first side portion 22, the overall cross-sectional area of ​​the first side portion 22 tends to gradually decrease. In this way, along the length direction of the first side portion 22, the cross-sectional area of ​​the first side portion 22 in its width direction tends to decrease more evenly, avoiding the cross-sectional area of ​​a certain part suddenly becoming smaller, thereby causing sharp edges to be formed in this part and scratching the user; at the same time, the overall cross-sectional area tends to gradually decrease, which can also play a guiding role, making it easier for the teeth to be stuck in the accommodating cavity 24, and the cross-sectional area of ​​the end portion of the first side portion 22 close to the main flow portion 21 is larger, and it has stronger structural strength, thereby making the first side portion 22 have a better holding effect.

[0285] It can be understood that the second side portion 23 can be configured in the same manner as the first side portion 22, and the cross-sectional area of ​​the second side portion 23 in its width direction gradually decreases to avoid a situation where the cross-sectional area of ​​a certain part of the second side portion 23 along its length direction suddenly becomes smaller, and to prevent the second side portion 23 from forming sharp edges and corners here to scratch the user. At the same time, it can also serve as a guide to facilitate the teeth to be inserted into the accommodating cavity 24, and cooperate with the first side portion 22 to facilitate the clamping of the inner and outer sides of the teeth.

[0286] Specifically, from the connecting end to the free end of the first side portion 22, the width of at least the end portion of the first side portion 22 in its width direction gradually decreases, and from the connecting end to the free end of the second side portion 23, the width of at least the end portion of the second side portion 23 in its width direction gradually decreases.

[0287] It is understood that the cross-sectional area of ​​the first side portion 22 gradually decreases in its width direction, which may be due to the gradual decrease in thickness, width, or both of the first side portion 22. The cross-sectional area of ​​the second side portion 23 gradually decreases in its width direction, which may be due to the gradual decrease in thickness, width, or both of the second side portion 23.

[0288] Since when the nozzle 20 is placed in the oral cavity, the width direction of the first side portion 22 and the second side portion 23, that is, the length direction when the oral cavity is not opened, if the width of the ends of the first side portion 22 and the second side portion 23 is too large, it is not conducive to placing the nozzle 20 in the oral cavity and is easy to collide with the teeth. Therefore, compared with reducing the thickness of the first side portion 22, the present application chooses to reduce the width of the ends of the first side portion 22 and the second side portion 23, which greatly facilitates the insertion of the nozzle 20 into the oral cavity, and at the same time facilitates the teeth to be stuck in the accommodating cavity 24, effectively avoiding the first side portion 22 and the second side portion 23 from colliding with the teeth; and in order to clean the teeth in all positions, the first side portion 22 and the second side portion 23 need to move along the direction of tooth arrangement, that is, move along the length direction of the oral cavity, and the first side portion 22 and the second side portion 23 with smaller width are more convenient to move in the oral cavity.

[0289] More specifically, the width of the first side portion 22 gradually decreases in its width direction. Unlike the above-mentioned first side portion 22 in which the width of at least the end portion gradually decreases in its width direction, the overall width of the first side portion 22 shows a gradually decreasing trend along the length direction of the first side portion 22. In this way, the width of the first side portion 22 tends to decrease more evenly along the length direction of the first side portion 22, which can avoid the sudden reduction in the width of a certain end portion of the first side portion 22 along its length direction, resulting in the formation of relatively sharp edges in this portion, which would scratch the user's mouth. By gradually reducing the overall width of the first side portion 22, the first side portion 22 has a more beautiful appearance and a more reasonable structural design.

[0290] It can be understood that the second side portion 23 can be configured in the same manner as the first side portion 22, and the width of the second side portion 23 gradually decreases in its width direction. This configuration can avoid the sudden reduction in the width of a certain end portion of the second side portion 23 along its length direction, resulting in the formation of relatively sharp edges in this portion, thereby scratching the user.

[0291] Furthermore, the free end of the first side portion 22 is bent and extended toward the second side portion 23, and the free end of the second side portion 23 is bent and extended toward the first side portion 22. Based on such a structure, when the tooth is inserted into the accommodating cavity 24, the free end of the first side portion 22 is bent and extended in the direction close to the tooth, so that it can better abut against the inner side surface of the tooth, and the free end of the second side portion 23 is also bent and extended in the direction close to the tooth, so that it can better abut against the outer side surface of the tooth. The first side portion 22 and the second side portion 23 cooperate with each other to better clamp the teeth, improve the relative stability between the nozzle 20 and the teeth, and avoid the teeth from being separated from the accommodating cavity 24 under the reaction force of the pulsed water column, which helps to protect the teeth and prevent the teeth from loosening, and is conducive to flushing fixed positions to enhance the cleaning effect.

[0292] In some embodiments, the ratio of the cross-sectional area of ​​the free end of the first side portion 22 in its width direction to the cross-sectional area of ​​the connecting end of the first side portion 22 in its width direction is less than 1 / 3, and the first side portion 22 has a free end and a connecting end, the connecting end is connected to the main portion 21, and the free end is connected to the end of the connecting end away from the main portion 21. Since the free end needs to be extended into the oral cavity and clamp the teeth, the cross-sectional area of ​​the free end in its width direction is set to be smaller to ensure that the free end is not easy to interfere with the teeth when it is stuck in the teeth; the cross-sectional area of ​​the connecting end in its width direction is set to be larger to ensure that the first side portion 22 has better structural strength, can better support the free end, and make the free end have a better clamping effect.

[0293] It can be understood that the second side portion 23 can be configured in the same manner as the first side portion 22. The second side portion 23 also has a free end and a connecting end. The connecting end is connected to the main portion 21, and the free end is connected to the end of the connecting end away from the main portion 21. The ratio of the cross-sectional area of ​​the free end of the second side portion 23 in its width direction to the cross-sectional area of ​​the connecting end of the second side portion 23 in its width direction is less than 1 / 3, so as to ensure that the free end is not easy to interfere with the teeth when it is stuck in the teeth. At the same time, the second side portion 23 has better structural strength, can better support the free end, and make the free end have a better clamping effect.

[0294] In one embodiment, the free end of the first side portion 22 gradually converges in the direction away from the main flow portion 21. The difference between this arrangement and the gradually decreasing width of the first side portion 22 is that the free end of the first side portion 22 gradually decreases in width and thickness in the direction away from the main flow portion 21. On the one hand, it is beneficial for the nozzle 20 to extend into the oral cavity to avoid collision with the teeth. At the same time, the reduced thickness can effectively reduce the foreign body sensation in the oral cavity and facilitate the movement of the nozzle 20 in the oral cavity. On the other hand, the simultaneous reduction in thickness and width makes the outer peripheral surface of the first side portion 22 smoother, avoiding the outer peripheral surface of the first side portion 22 from scratching the user's mouth, and can also form a guiding effect, further facilitating the teeth to be stuck in the accommodating cavity 24.

[0295] It can be understood that the second side portion 23 can be set in the same way as the first side portion 22, and the free end of the second side portion 23 gradually converges in the direction away from the main portion 21, which can avoid the second side portion 23 from colliding with the teeth, and at the same time can effectively reduce the foreign body sensation in the oral cavity, and also facilitate the movement of the nozzle 20 in the oral cavity.

[0296] In one embodiment, a portion of the first side portion 22 close to the mainstream portion 21 is perpendicular to the mainstream portion 21, a portion of the first side portion 22 away from the mainstream portion 21 is bent toward the second side portion 23, a portion of the second side portion 23 close to the mainstream portion 21 is perpendicular to the mainstream portion 21, and a portion of the second side portion 23 away from the mainstream portion 21 is bent toward the first side portion 22.

[0297] The first side portion 22, the second side portion 23 and the main stream portion 21 are jointly arranged to form an accommodating chamber 24. The first side portion 22 has a free end and a connecting end, the connecting end of which is connected to the main stream portion 21, and the free end of which is bent toward the second side portion 23. Similarly, the second side portion 23 has a free end and a connecting end, the connecting end of which is connected to the main stream portion 21, and the free end of which is bent toward the first side portion 22. Therefore, the open end of the accommodating chamber 24 forms a closed shape. When the teeth are stuck in the accommodating chamber 24, the free ends of the first side portion 22 and the second side portion 23 are respectively bent in the direction close to the teeth, playing the role of clamping the teeth. When flushing, the relative stability between the nozzle 20 and the teeth is improved, and the teeth are prevented from being separated from the accommodating chamber 24 under the reaction force of the pulsed water column, which helps to protect the teeth and prevent them from loosening, and is conducive to flushing fixed positions to enhance the cleaning effect.

[0298] Referring to Figures 8-9, in some embodiments, the cross-sectional area of ​​the first flow channel 221 gradually decreases and / or remains constant as it moves away from the main flow channel 211. The mold within the first flow channel 221 moves along the first flow channel 221 toward the main flow channel 211 during core pulling. This allows the mold within the first flow channel 221 to move smoothly during core pulling, preventing undercuts and facilitating core pulling.

[0299] The cross-sectional area of ​​the second flow channel 231 gradually decreases and / or remains constant in a direction away from the main flow channel 211. The mold in the second flow channel 231 moves along the second flow channel 231 toward the main flow channel 211 during core pulling. Thus, the mold in the second flow channel 231 moves smoothly during core pulling without backlash, making core pulling easier.

[0300] Continuing with Figures 8 and 9, the cross-sectional area of ​​the main channel 211 gradually decreases and / or remains constant as it moves away from the nozzle rod 10 of the oral irrigator. A needle-shaped mold 5 is inserted during the shaping of the main channel 211 to define its shape. After the main channel 211 is formed, the needle-shaped mold 5 needs to be removed and moved along the main channel 211 toward the nozzle rod 10. This allows the needle-shaped mold 5 to move smoothly within the main channel 211, preventing it from buckling and making it easier to remove.

[0301] The wall thickness of the main channel 211 is not less than 1.5 mm. In other words, the wall thickness of the main channel 211 is greater than or equal to 1.5 mm. For example, the wall thickness of the main channel 211 can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2 mm.

[0302] When the wall thickness of the main channel 211 is less than 1.5 mm, the wall thickness of the main channel 211 is relatively thin, and the wall of the main channel 211 is easily deformed by force, and the structure of the wall of the main channel 211 is not easy to maintain. Since the liquid of the spray rod 10 needs to pass through the main channel 211 to flow to the first flow channel 221 and the second flow channel 231, after the main channel 211 is deformed, the main portion 21 may bend and cause the cross-sectional area of ​​part of the main channel 211 to decrease, thereby affecting the speed and flow of the liquid flowing to the first flow channel 221 and the second flow channel 231. Excessive reduction in the water outlet speed or water output of any one of the first flow channel 221 and the second flow channel 231 will affect the cleaning effect of the water flosser.

[0303] When the wall thickness of the main channel 211 is not less than 1.5 mm, the wall thickness of the main channel 211 is large enough to reduce the deformation probability and deformation amplitude of the wall of the main channel 211. The structure of the wall of the main channel 211 has good retention ability. When the liquid of the spray rod 10 flows through the main channel 211 to the first flow channel 221 and the second flow channel 231, the water outlet speed and water output of the first flow channel 221 can be maintained within the effective range, and the water outlet speed and water output of the second flow channel 231 can be maintained within the effective range, thereby improving the cleaning effect of the oral irrigator on the oral cavity.

[0304] 12 and 15 , the main flow section 21 has an opposing transition inner surface 212 and a transition outer surface 213. The transition inner surface 212 connects to the first side section 22 and the second side section 23. One of the end surface of the main flow section 21 and the transition outer surface 213 is open and connected to the spray boom 10, while the other is closed.

[0305] Specifically, when the central axis of the main stream portion 21 is arranged to coincide with the central axis of the spray rod 10, the main stream portion 21 is provided with a socket hole 2151 at one axial end thereof, and the socket hole 2151 is open for connection with the spray rod 10, and a process port 25 is provided on the transition outer surface 213 of the main stream portion 21, and the process port 25 is closed.

[0306] When the central axis of the main flow section 21 is arranged perpendicular to the central axis of the spray rod 10, the main flow section 21 is provided with a process port 25 at one axial end thereof, and the process port 25 is closed. The transition outer surface 213 of the main flow section 21 is provided with a socket hole 2151, and the socket hole 2151 is open for connection with the spray rod 10.

[0307] By setting the sleeve hole 2151 and opening the sleeve hole 2151, the spray rod 10 can be inserted into the main flow part 21 through the sleeve hole 2151 to achieve connection between the spray rod 10 and the main flow part 21, and achieve communication between the main channel 211 and the spray rod channel 11.

[0308] By setting the process port 25 , core pulling can be achieved during the process of forming the nozzle 20 , and the process port 25 is closed after the nozzle 20 is formed, which can prevent the liquid in the main channel 211 from leaking from the process port 25 and improve the sealing performance of the nozzle 20 .

[0309] Please refer to Figure 15. The above-mentioned main flow portion 21 has a transition inner surface 212 and a transition outer surface 213 that are relatively arranged. The transition inner surface 212 is connected to the first side portion 22 and the second side portion 23. The transition outer surface 213 is provided with a process port 25. The process port 25 is connected to the main flow channel 211. One end of the first flow channel 221 facing the process port 25 and one end of the second flow channel 231 facing the process port 25 are both arranged corresponding to the position of the process port 25.

[0310] Specifically, during the molding process of the nozzle 100 , after molding, the mold in the first flow channel 221 , the mold in the second flow channel 231 , and the mold in the main flow channel 211 can be easily pulled out from the process port 25 , making core pulling easy.

[0311] In addition, the nozzle 20 also includes a sealing portion 26. Specifically, a portion of the main stream portion 21 is integrally formed with the first side portion 22 and the second side portion 23. The process port 25 is constructed as the above-mentioned portion of the main stream portion 21, and the sealing portion 26 is another portion of the main stream portion 21. The sealing portion 26 and the above-mentioned portion of the main stream portion 21 are constructed as an integrated structure for sealing the process port 25.

[0312] The material of the cover portion 26 and the material of the above-mentioned part of the main flow portion 21 can be the same or different.

[0313] In some embodiments of the present application, the cover portion 26 is an elastic member, and the cover portion 26 can be made of an elastic material such as silicone. Silicone materials are chemically stable and will not be corroded by saliva even if used in the mouth for a long time. More specifically, the silicone material can be edible silicone, which can avoid harm to the human body from toxic substances. It is understood that the elastic material can also include other soft rubber materials, such as PE (polyethylene, abbreviated PE) and PP (polypropylene, abbreviated PP). Soft rubber materials can not only deform elastically but also protect teeth and gums from being injured.

[0314] In other embodiments of the present application, the covering portion 26 is a hard part, and the covering portion 26 can be made of hard materials such as plastic. This is beneficial to improving the structural strength of the main channel 211 to reduce the probability of excessive deformation of the main channel 211, thereby helping the main channel 211 to maintain its own shape and ensure the smoothness of the flow of liquid in the main channel 211.

[0315] By providing the cover portion 26, the process port 25 can be sealed, preventing the liquid in the main channel 211 from leaking from the process port 25. Since the cover portion 26 and the main channel 21 are constructed as an integrated structure, the connection strength between the cover portion 26 and the main channel 21 is higher, and the sealing performance is better. The nozzle 20 can be more adaptable to special placement conditions such as bending and high temperature, and the service life of the nozzle 20 is extended. The requirements of the nozzle 20 for the placement environment can also be correspondingly reduced, which is conducive to improving the applicability of the nozzle 20.

[0316] Continuing to refer to Figure 15, the cross-sectional area of ​​the process port 25 gradually increases or remains constant as it moves away from the main channel 211. This allows the mold in the first channel 221, the mold in the second channel 231, and the mold in the main channel 211 to pass more smoothly from the process port 25 without back-stuck, facilitating core pulling and easy demoulding.

[0317] The main flow portion 21 , the first side portion 22 and the second side portion 23 are formed into an integrated structure by a single injection molding, and the main flow portion 21 and the cover portion 26 are formed into an integrated structure by a second injection molding.

[0318] In this way, the nozzle 20 can be completed through two injection moldings, with fewer processing steps and easy core pulling. After production, the nozzle 20 is an integrated structure with high structural strength, long service life and good sealing.

[0319] Referring to FIG. 11 , in some embodiments, the thickness of the second side portion 23 gradually decreases and / or remains constant from the center of the second side portion 23 in the width direction to the edge of the second side portion 23 in the width direction.

[0320] During the molding process of the nozzle 20, the mold is located on opposite sides of the width direction of the second side portion 23. Therefore, it is arranged in the width direction of the second side portion 23, and the thickness of the second side portion 23 gradually decreases from the center to the edge or remains unchanged, which can avoid the situation of undercutting during demolding, facilitates the demolding of the second side portion 23, and has a low probability of damage to the second side portion 23.

[0321] For example, the side surface of the second side portion 23 facing away from the first side portion 22 can be set as a curved surface, and in the width direction of the second side portion 23, the center of the side surface of the second side portion 23 facing away from the first side portion 22 protrudes relative to the two side edges in the direction away from the first side portion 22; the side surface of the second side portion 23 facing the first side portion 22 can also be set as a curved surface, and in the width direction of the second side portion 23, the center of the side surface of the second side portion 23 facing the first side portion 22 protrudes relative to the two side edges in the direction close to the first side portion 22.

[0322] Continuing to refer to FIG. 11 , the thickness of the main flow portion 21 gradually decreases and / or remains constant from the center of the main flow portion 21 in the width direction to the edge of the main flow portion 21 in the width direction.

[0323] During the molding process of the nozzle 20, the mold is located on opposite sides of the width direction of the main portion 21. Therefore, it is set in the width direction of the main portion 21. The thickness of the main portion 21 gradually decreases from the center to the edge or remains unchanged, which can avoid the situation of undercutting during demolding, facilitates the demolding of the main portion 21, and has a low probability of damage to the main portion 21.

[0324] For example, the transition inner surface 212 of the main flow portion 21 can be set as an arc surface, and in the width direction of the main flow portion 21, the center of the transition inner surface 212 protrudes in the direction away from the transition outer surface 213 relative to the two side edges; the transition outer surface 213 of the main flow portion 21 can also be set as an arc surface, and in the width direction of the main flow portion 21, the center of the transition outer surface 213 protrudes in the direction away from the transition inner surface 212 relative to the two side edges.

[0325] In some embodiments, the axis of the water outlet of the boom flow channel 11 passes through the middle of the extension direction of the main channel 211. When the liquid in the boom flow channel 11 flows from the water outlet 111 to the main channel 211, because the water outlet 111 of the boom flow channel 11 is located in the middle of the extension direction of the main channel 211, the liquid in the boom flow channel 11 takes roughly the same path to reach the first flow channel 221 and the second flow channel 231, ensuring that water can be discharged from the first nozzle 224 and the second nozzle 234 at the same time, avoiding the water flow from being shot at the human body due to asynchronous water discharge, and improving the safety of the device.

[0326] Please continue to refer to Figure 11. In some embodiments, the first side portion 22 has a first inner side surface 222 and a first outer side surface 223 relative to each other, the second side portion 23 has a second inner side surface 232 and a second outer side surface 233 relative to each other, and the main flow portion 21 has a transition inner surface 213 and a transition outer surface 215 relative to each other; the first inner side surface 222, the transition inner surface 213, and the second inner side surface 232 are connected in a smooth transition in sequence. When rinsing the teeth, these three inner surfaces are opposite to the teeth. During the rinsing process, the residue in the gaps between the teeth will fall on the three inner surfaces. The three smoothly connected inner surfaces are conducive to the residue sliding off from above, avoiding the residue remaining at the corner where the first inner side surface 222, the second inner side surface 232 and the transition inner surface 213 are connected.

[0327] The first outer side surface 223, the transition outer surface 215, and the second outer side surface 233 are connected in a smooth transition sequence, so that when the nozzle 20 is extended out of the user's mouth, the sharp outer corners will not scratch the user's mouth. At the same time, the smooth outer surface makes it easy to remove the nozzle 20 from the user's mouth and prevents the nozzle 20 from getting stuck.

[0328] Referring to FIG. 3 , in some embodiments, the plug portion 12 extends along a first direction AA, the main flow portion 21 extends along a fourth direction DD, and an angle between the fourth direction DD and the first direction AA is not less than 0 degrees and not greater than 30 degrees.

[0329] In actual application, when teeth need to be flushed, the user holds the water flosser 1000 with the nozzle 100 facing the user's side, first inserts the nozzle 20 into the front teeth that are easy to insert, and then moves the spray rod 10 as needed. Usually, the user holds it at the main body 200 of the water flosser or at the plug-in part 12 of the spray rod 10. Since the main stream 21 in the nozzle 20 and the plug-in part 12 of the spray rod 10 extend in the same direction or the angle is within 30 degrees, that is, the extension direction of the main stream 21 is roughly the same as the extension direction of the plug-in part 12, when the user moves the plug-in part 12, the plug-in part 12 drives the nozzle 20 to move more smoothly in the arrangement direction of the teeth, avoiding collision between the nozzle 20 and the teeth, and at the same time giving the user a more comfortable holding posture, effectively alleviating arm fatigue, and increasing the user's comfort experience.

[0330] Please refer to Figures 28 to 30. In some embodiments, the side of the main flow portion 21 away from the accommodating chamber 24 is connected to the transmission portion 13, wherein the side of the main flow portion 21 away from the accommodating chamber 24 is the same as the above-mentioned transition outer surface 213, the transmission portion 13 has a midplane P along the first direction AA and parallel to the thickness direction of the nozzle 20, the spray rod 10 is symmetrical about the midplane P, the nozzle 20 has a midplane Q along the fourth direction DD and parallel to the thickness direction of the nozzle 20, the nozzle 20 is symmetrical about the midplane Q, and the spacing between the midplane P and the midplane Q and the cross-section of the nozzle 20 is not less than 0 mm and not more than 2 mm.

[0331] Specifically, the length of the nozzle 20 in a direction perpendicular to the midplane Q is set to the width of the nozzle 20. When the spacing between the midplane P and the midplane Q and the cross section of the nozzle 20 is 0 mm, it is equivalent to the midplane P and the midplane Q being the same plane. In this way, the nozzle 20 and the transmission part 13 are symmetrical about the same plane, which is conducive to reducing the size of the nozzle 20 in its width direction. When the nozzle 20 is inserted into the mouth, the user cannot observe the specific position of the nozzle 20 with their eyes and can only insert it by feel. The smaller width of the nozzle 20 is conducive to the user's blind field insertion into the teeth, reducing the foreign body sensation in the mouth. It should be noted that when the spacing between the midplane P and the midplane Q and the cross section of the nozzle 20 is not greater than 2 mm, the spacing between the midplane P and the midplane Q is smaller, which can also achieve the above-mentioned effect.

[0332] Furthermore, the main flow portion 21 is at least partially an elastic member. Specifically, along the first direction AA, the main flow portion 21 is connected to the end of the transmission portion 13, and the side of the main flow portion 21 away from the accommodating cavity 24 is made of soft rubber material; or, the transmission portion 13 is connected to the side of the main flow portion 21 away from the accommodating cavity 24, and along the direction perpendicular to the first direction AA, the side of the transmission portion 13 away from the accommodating cavity 24 is made of soft rubber material, and the soft rubber material is the same as the above-mentioned elastic member.

[0333] In actual application, when the main flow section 21 is connected to the end of the transmission section 13, the nozzle 20 is inserted into the oral cavity, and the user's upper teeth are first stuck in the accommodating cavity 24. At this time, the back of the main flow section 21, that is, the side away from the accommodating cavity 24, is opposite to the user's lower teeth. Due to the action of opening the mouth for a long time, the user is prone to fatigue. At this time, the user's mouth will unconsciously contract, and the lower teeth will move closer to the upper teeth. The lower teeth will then contact the back of the main flow section 21. Making the back of the main flow section 21 into a soft rubber material can effectively reduce the foreign body sensation caused by the teeth touching it. It is understandable that when the transmission section 13 is connected to the side of the main flow section 21 away from the accommodating cavity 24, making the side of the transmission section 13 away from the accommodating cavity 24 into a soft rubber material can also achieve the above-mentioned effect.

[0334] The end of the transmission part 13 close to the nozzle 20 is made of soft rubber material, and the end of the transmission part 13 close to the nozzle 20 rotates relative to the nozzle 20 along the width direction of the second side part 23; the direction perpendicular to the midplane Q is set as the width direction of the second side part 23.

[0335] It should be noted that the nozzle 20 needs to be moved in the oral cavity to clean the teeth in all positions. Since the teeth are arranged along an arc, the nozzle 20 in the prior art usually needs to adjust the position of the spray rod 10 according to the curvature of the teeth when moving, which causes the user to frequently change the holding posture, and the operation is very cumbersome.

[0336] In this application, the material of the end of the transmission part 13 close to the nozzle 20 is set to be a soft rubber material. The soft rubber material is flexible and easy to deform. When the nozzle 20 moves with the curvature of the teeth, the nozzle 20 and the teeth are abutted. This abutment force can deflect the soft rubber material, so that the nozzle 20 can be deflected smoothly, and then the position of the nozzle 20 can be quickly adjusted to be in a normal flushing position with the teeth. During this process, the user's holding posture and angle can basically remain unchanged, which greatly improves the user's comfort. At the same time, the soft rubber material also has a certain elasticity, which can make the nozzle 20 return to its initial state in a non-stressed state. After use, there is no need to manually correct the position of the nozzle 20, so as to avoid touching the nozzle 20 with your hands and causing pollution.

[0337] Referring to FIG31 , in some embodiments, the plug-in portion 12 extends in a straight line, and the transmission portion 13 extends in an arc. The plug-in portion 12 is symmetrical about the midplane P. Specifically, one end of the plug-in portion 12 is connected to the main body 200, and the other end is connected to the transmission portion 13. The plug-in portion 12 is provided with at least a portion of the boom flow channel 11 and is in communication with the main body 200. The transmission portion 13 is provided with at least a portion of the boom flow channel 11 and is in communication with at least a portion of the boom flow channel 11 in the plug-in portion 12 to form a complete boom flow channel 11. The plug-in portion 12 can extend in a straight line to facilitate connection with the main body 200; the transmission portion 13 can extend in an arc. Since the transmission portion 13 is closer to the user's mouth, it is configured in an arc shape. The arc portion can avoid the chin, better fit the human mouth, and facilitate more comfortable gripping by the user.

[0338] Please refer to Figure 32. In one embodiment, the transmission part 13 can also be composed of multiple sections connected at angles to each other along the extension direction of the midplane P, so that the spray rod 10 extends in a fold line. The spray rod 10 with a fold line extension can also avoid the chin and fit the human mouth, making it convenient for the spray rod 10 to move along the oral cavity.

[0339] In one embodiment, the plug-in portion 12 can extend in a straight line, and the transmission portion 13 can also extend in a straight line. The plug-in portion 12 is symmetrical about the midplane P, and the transmission portion 13 is symmetrical about the midplane P. This configuration allows the spray bar 10 to be a straight-line extending rod body, which facilitates the connection of the spray bar 10 with the main body 200 and the nozzle 20, respectively. It also simplifies the production and processing process. Based on this structure, the spray bar flow channel 11 can be a straight flow channel, which speeds up the flow rate of the liquid through the spray bar flow channel 11, shortens the time it takes for the liquid to reach the nozzle 20, and achieves the effect that the water flosser 1000 can be used and dispense water immediately.

[0340] Based on the above-mentioned material reduction groove 2153, in some embodiments, multiple material reduction grooves 2153 are symmetrically distributed about the midplane P. While reducing the thickness of the end of the transmission part 13, the consistency of the symmetrical structures on both sides of the transmission part 13 about the midplane P is ensured, thereby increasing the aesthetics of the spray rod 10 and making the structure more reasonable.

[0341] In one embodiment, any side of the midplane P includes at least two material reduction grooves 2153, and at least two material reduction grooves 2153 on any side are arranged at intervals in the first direction AA. Multiple material reduction grooves 2153 are provided and arranged at intervals in the first direction AA, which further improves the deformation ability of the soft rubber material and ensures the structural stability of the end of the transmission part 13, thereby avoiding the material reduction groove 2153 from having an excessively large opening that affects the hardness of the soft rubber material and makes it unable to support the nozzle 20.

[0342] The following describes a method for forming the nozzle 100 .

[0343] 33-35 , the method for forming the nozzle 100 includes:

[0344] At least a portion of the main flow portion 21, the first side portion 22, and the second side portion 23 of the nozzle 20 are formed. The main flow portion 21, the first side portion 22, and the second side portion 23 are constructed as an integrated structure. The first side portion 22 and the second side portion 23 are arranged at intervals along the extension direction of the main flow portion 21 and are located on the same side of the main flow portion 21. A main flow channel 211 is formed in the main flow portion 21, a first flow channel 221 is formed in the first side portion 22, and a second flow channel 231 is formed in the second side portion 23. The main flow channel 211 is connected to the first flow channel 221 and the second flow channel 231 respectively.

[0345] The spray bar 10 is formed and connected to the main flow portion 21 . The spray bar 10 can be formed before the spray head 20 is formed, or after the spray head 20 is formed.

[0346] In this way, the nozzle 20 constructs the main portion 21, the first side portion 22 and the second side portion 23 into an integrated structure. The nozzle 20 does not need to be reassembled, the production steps of the nozzle 20 are reduced, the production efficiency is improved, and the nozzle 20 has better sealing and is not easily affected by changes in ambient temperature.

[0347] Please refer to FIG. 11 . The main flow portion 21 has a transition inner surface 212 and a transition outer surface 213 that are oppositely disposed. The transition inner surface 212 is connected to the first side portion 22 and the second side portion 23 .

[0348] The above step of forming at least a portion of the main flow portion 21 of the nozzle 20, the first side portion 22, and the second side portion 23 includes:

[0349] A portion of the main flow portion 21, a first side portion 22, and a second side portion 23 are formed. A process port 25 is formed on one of the end surface of one end of the main flow portion 21 and the transition outer surface 213. A sleeve hole 2151 is formed on the other of the end surface of one end of the main flow portion 21 and the transition outer surface 213.

[0350] The sealing portion 26 is formed into an integral structure with the above-mentioned part of the main flow portion 21 and is used to seal the process port 25 , and the spray rod 10 is inserted into the socket hole 2151 to achieve the connection between the spray rod 10 and the main flow portion 21 .

[0351] That is, one of the end surface of one end of the main flow portion 21 and the transition outer surface 213 is open and connected to the spray bar 10 , and the other is closed.

[0352] Specifically, when the central axis of the main stream portion 21 is arranged to coincide with the central axis of the spray rod 3, the main stream portion 21 is provided with a socket hole 2151 at one axial end thereof, and the socket hole 2151 is open for connection with the spray rod 10. The transition outer surface 213 of the main stream portion 21 is provided with a process port 25, and the process port 25 is closed.

[0353] When the central axis of the main flow section 21 is arranged perpendicular to the central axis of the spray rod 3, the main flow section 21 is provided with a process port 25 at one axial end thereof, and the process port 25 is closed. The transition outer surface 213 of the main flow section 21 is provided with a socket hole 2151, and the socket hole 2151 is open for connection with the spray rod 10.

[0354] By setting the sleeve hole 2151 and opening the sleeve hole 2151, the spray rod 10 can be inserted into the main flow part 21 through the sleeve hole 2151 to achieve connection between the spray rod 10 and the main flow part 21, and achieve communication between the main channel 211 and the spray rod channel 11.

[0355] By setting the process port 25 , core pulling can be achieved during the process of forming the nozzle 20 , and the process port 25 is closed after the nozzle 20 is formed, which can prevent the liquid in the main channel 211 from leaking from the process port 25 and improve the sealing performance of the nozzle 20 .

[0356] Continuing to refer to FIG11 , the main flow portion 21 has a transition inner surface 212 and a transition outer surface 213 disposed opposite each other, and the transition inner surface 212 is connected to the first side portion 22 and the second side portion 23. As shown in FIG35 , the above steps of forming at least a portion of the main flow portion 21, the first side portion 22, and the second side portion 23 of the nozzle head 20 include:

[0357] A portion of the main flow portion 21, a first side portion 22, and a second side portion 23 are formed. A process port 25 is provided on the transition outer surface 213. The process port 25 is connected to the main flow channel 211. One end of the first flow channel 221 facing the process port 25 and one end of the second flow channel 231 facing the process port 25 are both arranged corresponding to the position of the process port 25. A socket hole 2151 is formed on the end surface of the main flow portion 21.

[0358] A sealing portion 26 is formed on the outer transition surface 213 , and the sealing portion 26 and a portion of the main flow portion 21 are constructed as an integral structure for sealing the process port 25 , and the spray rod 10 is inserted into the socket hole 2151 to achieve connection between the spray rod 10 and the main flow portion 21 .

[0359] In this way, the core pulling is facilitated, and before the core pulling, the process port 25 is closed by the cover portion 26 to ensure sealing, and the cover portion 26 is also integrally formed with a part of the main flow portion 21 to avoid reassembly.

[0360] Please refer to FIG35 . Before the above step of forming the cover portion 26 on the transition outer surface 213 of a portion of the main flow portion 21 , the method for forming the nozzle 100 further includes:

[0361] The needle-shaped module 5 is inserted into the main channel 211 , with both ends of the needle-shaped module 5 exceeding the edge of the process opening 25 in the extending direction of the main channel 211 . The needle-shaped module 5 is sealed against the inner wall of the main channel 211 .

[0362] By inserting the needle-shaped module 5 into the main channel 211 , it is possible to prevent the liquid to be formed from flowing into the main channel 211 during the process of forming the cover portion 26 , thereby ensuring that the structure of the main channel 211 meets expectations.

[0363] The main flow portion 21 has a transition inner surface 212 and a transition outer surface 213 that are oppositely disposed. The transition inner surface 212 is connected to the first side portion 22 and the second side portion 23. The above steps of forming at least a portion of the main flow portion 21, the first side portion 22, and the second side portion 23 of the nozzle head 20 include:

[0364] A portion of the main flow portion 21, a first side portion 22, and a second side portion 23 are formed. A sleeve hole 2151 is provided on the transition outer surface 213. A process port 25 is formed on the end surface of one end of the main flow portion 21. The process port 25 is connected to the main flow channel 211.

[0365] A sealing portion 26 is formed on the end face of the above-mentioned one end of the main flow portion 21. The sealing portion 26 and the above-mentioned part of the main flow portion 21 are constructed as an integrated structure, which is used to seal the process port 25, and the spray rod 10 is inserted into the socket hole 2151 to realize the connection between the spray rod 10 and the main flow portion 21.

[0366] In this way, the core pulling is facilitated, and before the core pulling, the process port 25 is closed by the cover portion 26 to ensure sealing, and the cover portion 26 is also integrally formed with a part of the main flow portion 21 to avoid reassembly.

[0367] The above steps: forming the spray bar 10, and connecting the spray bar 10 and the main flow part 21, include:

[0368] Before forming at least a portion of the main flow portion 21 of the nozzle 20, the first side portion 22, and the second side portion 23, the spray rod 10 is formed, and the main flow portion 21 is formed on the spray rod 10, so that the spray rod 10 and the main flow portion 21 are formed into an integrated structure; or

[0369] After forming at least a portion of the main flow portion 21 , the first side portion 22 and the second side portion 23 of the nozzle 20 , the spray bar 10 is formed on the main flow portion 21 . The spray bar 10 and the main flow portion 21 are formed into an integrated structure.

[0370] That is to say, before forming the nozzle head 20, the spray rod 10 can be formed first, and then the spray rod 10 can be placed in the mold to form the nozzle head 20 connected to the spray rod 10 in the mold; or after forming the nozzle head 20, the nozzle head 20 can be placed in the mold to form the spray rod 10 connected to the nozzle head 20 in the mold.

[0371] In this way, since the nozzle head 20 and the spray rod 10 are formed as one body, the sealing between the nozzle head 20 and the spray rod 10 is better, which can reduce the probability of water leakage between the nozzle head 20 and the spray rod 10, and the connection strength between the nozzle head 20 and the spray rod 10 is high, which is conducive to extending the service life.

[0372] Referring to Figure 33 , the steps for forming the main flow section 21 on the spray boom 10 include: inserting the needle module 5 into the boom flow channel 11 of the spray boom 10, with both ends of the needle module 5 extending beyond the ends of the spray boom 10; forming the main flow section 21 on the spray boom 10, with a portion of the needle module 5 inserted into the main flow channel 211; and withdrawing the needle module 5 to connect the main flow channel 211 with the boom flow channel 11. This ensures reliable connection between the main flow channel 211 and the boom flow channel 11.

[0373] Referring to Figure 34 , the steps for forming the boom 10 on the main flow section 21 include: inserting the needle module 5 into the main flow channel 211, with one end of the needle module 5 extending beyond the main flow section 21; forming the boom 10 on the main flow section 21, with a portion of the needle module 5 inserted into the boom flow channel 11 of the boom 10; and withdrawing the needle module 5 to connect the main flow channel 211 with the boom flow channel 11. This ensures reliable communication between the main flow channel 211 and the boom flow channel 11.

[0374] The following describes the molding process of the nozzle 100 with reference to the accompanying drawings:

[0375] Referring to FIG. 36 , a spray bar 10 is formed, wherein the spray bar 10 may be a hard part made of plastic material, and a needle-shaped mold 5 is inserted into the spray bar flow channel 11 of the spray bar 10 , wherein the needle-shaped mold 5 may be a steel needle, etc.;

[0376] Referring to FIG. 37 , the spray bar 10 inserted into the needle-shaped mold 5 is placed in the first molding die 4. At least a portion of the main flow portion 21 of the nozzle 20, the first side portion 22, and the second side portion 23 are molded in the first molding die 4. The main flow portion 21 is connected to the spray bar 10. A portion of the needle-shaped mold 5 is inserted into the main flow portion 21 so that the spray bar flow channel 11 of the spray bar 10 communicates with the main flow channel 211 of the main flow portion 21. The first molding die 4 molds the main flow channel 211 in the main flow portion 21, the first flow channel 221 in the first side portion 22, and the second flow channel 231 in the second side portion 23, and then performs core pulling.

[0377] Please refer to Figures 38-39. Take the nozzle 20 and the spray rod 10 out of the first molding mold 4, and pull out the needle-shaped mold 5.

[0378] Please refer to Figure 40. The needle-shaped mold 5 is inserted into the spray bar flow channel 11 and the main channel 211 of the spray bar 10 again. The two ends of the needle-shaped mold 5 extend beyond the process opening 25 in the extending direction of the main channel 211.

[0379] Please refer to Figure 41. The spray rod 10 and the nozzle 20 inserted into the needle-shaped mold 5 are placed in the second molding mold 6. A covering part 26 is formed in the second molding mold 6 as one piece with the main flow part 21. The covering part 26 is located in the process port 25 and is used to cover the process port 25.

[0380] Please refer to Figures 42-43, take the complete nozzle head 20 and the spray rod 10 out of the second molding mold 6, and pull out the needle-shaped mold 5.

[0381] In some embodiments of the present application, the spray head 20 may be formed first, and then the spray bar 10 connected to the spray head 20 may be formed.

[0382] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0383] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A nozzle, wherein: Applied to a water flosser, the nozzle comprises a spray rod and a spray head, the spray rod extends along a first direction and has a spray rod flow channel inside, and the spray head comprises: A main flow portion connected to the spray bar and having a main flow channel communicating with the spray bar flow channel; a first side portion extending from one end of the main flow portion along a second direction and having a first flow channel communicating with the main flow channel, the first side portion having a first inner side surface, the first flow channel forming a first nozzle on the first inner side surface, wherein the second direction is perpendicular to the first direction; and a second side portion extending from the other end of the main flow portion along the second direction, having a second flow channel communicating with the main flow channel, the second side portion being spaced apart from the first side portion and arranged opposite to each other along the first direction, so that the main flow portion, the first side portion and the second side portion constitute an accommodating cavity for accommodating teeth, the second side portion having a second inner side surface arranged opposite to the first inner side surface along the first direction, and the second flow channel forming a second nozzle on the second inner side surface; Wherein, a deformation section is arranged on the main flow portion, and at least the deformation section is an elastic member, so that the spray head can move relative to the spray rod.

2. The nozzle according to claim 1, wherein At least a part of the spray head is an elastic member, the spray head is an integrated structure, and the main flow portion is connected to the spray rod and formed into an integrated structure.

3. The nozzle according to claim 1, wherein: The main flow section and the spray bar are arranged in one of the following ways: Mode 1: The central axis of the main flow portion is arranged to coincide with the central axis of the spray bar; Mode 2: The central axis of the main flow portion is arranged perpendicular to the central axis of the spray rod.

4. The nozzle according to claim 1, wherein: When the central axis of the main flow portion is arranged to coincide with the central axis of the spray bar, the cross-sectional area of ​​the main flow channel is smaller than the cross-sectional area of ​​the spray bar flow channel.

5. The nozzle of claim 1, wherein: When the central axis of the main flow section coincides with the central axis of the spray bar, the main flow section comprises: a flow channel portion, connected to the first side portion and the second side portion respectively; and The connecting portion is connected to the flow channel portion and the spray bar respectively. The flow channel portion and the connecting portion are arranged along the extending direction of the main flow portion, and the main flow passes through the flow channel portion and the connecting portion.

6. The nozzle of claim 5, wherein: The connecting portion is provided with the deformation section at the end away from the spray bar.

7. The nozzle of claim 6, wherein: The deformation capacity of the deformation section in the second direction is smaller than the deformation capacity of the deformation section in the third direction; or, The thickness of the deformation segment in the second direction is greater than the thickness of the deformation segment in a third direction, wherein the third direction is perpendicular to the first direction and the second direction.

8. The nozzle of claim 6, wherein: The outer surface of the deformation section is provided with a material reduction groove to make the deformation section easy to deform; The material reduction groove is arranged on the outer surface of the connecting part which is relatively arranged along the third direction, the third direction, the first direction and the second direction are perpendicular to each other, the material reduction groove extends along the second direction, and / or the material reduction groove extends obliquely in a direction away from the spray rod.

9. The nozzle of claim 6, wherein: A material reduction groove is provided on the outer surface of the deformation section, and the width of the material reduction groove in the first direction is smaller than the diameter of the deformation section.

10. The nozzle of claim 6, wherein: A material reduction groove is provided on the outer surface of the deformation section. In a direction away from the second direction from the inside of the flow channel portion, the material reduction groove extends obliquely in a direction away from the spray rod.

11. The nozzle of claim 6, wherein: The outer surface of the deformation section is provided with a material reduction groove. Along the first direction, a plurality of the material reduction grooves are arranged at intervals on the deformation section, and the spacing between adjacent material reduction grooves is no more than 2.5 mm.

12. The nozzle of claim 6, wherein: The outer surface of the deformation section is provided with a material reduction groove, and the deformation section has the main flow channel. Along the third direction, the inner wall surface of the main flow channel and the bottom of the material reduction groove have a first thickness, and the first thickness is not less than 0.5 mm and not more than 0.9 mm. The third direction is perpendicular to the first direction and the second direction.

13. The nozzle of claim 6, wherein: Along the first direction, the length of the deformation segment is not less than 3.5 mm and not more than 15 mm; or, The diameter of the deformation section is not less than 1.2 mm; or, The hardness of the deformation section is not greater than 40 Shore hardness and less than or equal to 70 Shore hardness.

14. The nozzle of claim 6, wherein: The deformation section has the main flow channel therein, and the inner wall surface of the main flow channel and the outer surface of the deformation section have a second thickness, and the second thickness is not less than 1 mm and not more than 3 mm.

15. The nozzle of claim 6, wherein: The nozzle is an elastic member and satisfies at least one of the following conditions: Along the first direction, the overall length of the first side portion, the second side portion, and the flow channel portion is greater than the diameter of the deformation section; Along the second direction, the overall height formed by the first side portion, the second side portion and the flow channel portion is greater than the diameter of the deformation section; Along the third direction, the overall width formed by the first side portion, the second side portion and the flow channel portion is greater than the diameter of the deformation section; The first direction, the second direction and the third direction are perpendicular to each other.

16. The nozzle of claim 5, wherein: The flow channel part and the connecting part are both soft plastic parts and are formed separately. The flow channel part includes: A first sub-section is formed integrally with the connecting section; and The second sub-section is integrally formed with the first side section and the second side section, and is assembled and fixed with the first sub-section to jointly form the diversion channel, and the diversion channel is communicated with the first flow channel and the second flow channel.

17. The nozzle of claim 16, wherein: The first sub-part includes an annular protrusion, and the second sub-part has an annular mounting groove, in which the annular protrusion is clamped.

18. The nozzle of claim 16, wherein: The first sub-part includes an annular protrusion, and the second sub-part has an annular mounting groove, and the annular protrusion is clamped in the annular mounting groove; The bottom of the annular installation groove is provided with a glue filling groove, and glue is arranged in the glue filling groove. The glue is bonded to the groove wall of the glue filling groove and the first sub-part.

19. The nozzle of claim 16, wherein: The second side portion has a first outer surface disposed toward the deformation section. Along the second direction, there is a first distance between the first outer surface and the outer surface of the deformation section. The first distance is not less than 1.2 mm and not more than 2 mm.

20. The nozzle of claim 5, wherein: A sleeve hole is provided at one end of the connection portion facing the spray rod, the sleeve hole is communicated with the main flow channel, the spray rod is inserted into the sleeve hole, and the spray rod is sealed and matched with the inner wall of the sleeve hole.

21. The nozzle of claim 20, wherein: The inner wall of the sleeve hole is provided with a first stop step, and the outer peripheral surface of the spray rod is provided with a second stop step, and the first stop step and the second stop step stop against each other.

22. The nozzle of claim 5, wherein: The main flow portion has a transition inner surface and a transition outer surface which are arranged opposite to each other, and the transition inner surface is connected to the first inner side surface and the second inner side surface; In the third direction, the size of the flow channel portion is larger than that of the connecting portion, the connecting portion is connected to the transition outer surface and transitions in an arc shape, and the third direction is perpendicular to the first direction and the second direction in pairs.

23. The nozzle of claim 1, wherein: Along the second direction, the first side portion has a first length relative to the main flow portion, and the second side portion has a second length relative to the main flow portion; Wherein, the first length is smaller than the second length.

24. The nozzle of claim 23, wherein: The nozzle is an elastic member, the first side portion and the second side portion are spaced apart along the first direction, and the first side portion is farther away from the spray rod than the second side portion, the first side portion is used to clean the inner tooth surface, and the second side portion is used to clean the outer tooth surface.

25. The nozzle of claim 24, wherein: The first side portion has a third thickness in the first direction, the second side portion has a fourth thickness in the first direction, and the third thickness is smaller than the fourth thickness; and / or, Along a third direction, the first side portion has a first width, the second side portion has a second width, the first width is smaller than the second width, and the third direction is perpendicular to the first direction and the second direction.

26. The nozzle of claim 24, wherein: The first side portion has a third thickness in the first direction, the second side portion has a fourth thickness in the first direction, and the third thickness and the fourth thickness gradually decrease along the second direction and in a direction away from the main flow portion; and / or, Along the third direction, the first side portion has a first width, the second side portion has a second width, the first width and the second width gradually decrease along the second direction and in a direction away from the main flow portion, wherein the third direction is perpendicular to the first direction and the second direction in pairs.

27. The nozzle of claim 24, wherein: The width of at least the end portion of the first side portion gradually decreases in a direction away from the main flow portion, and the width of at least the end portion of the second side portion gradually decreases in a direction away from the main flow portion.

28. The nozzle of claim 24, wherein: From the connecting end to the free end of the first side portion, the cross-sectional area of ​​at least the end portion of the first side portion in the third direction gradually decreases; from the connecting end to the free end of the second side portion, the cross-sectional area of ​​at least the end portion of the second side portion in the third direction gradually decreases; and / or, The cross-sectional area of ​​the first side portion in the third direction gradually decreases, and the cross-sectional area of ​​the second side portion in the third direction gradually decreases, wherein the third direction is perpendicular to the first direction and the second direction in pairs.

29. The nozzle of claim 28, wherein The free end of the first side portion is bent and extended toward the second side portion, and the free end of the second side portion is bent and extended toward the first side portion.

30. The nozzle of claim 24, wherein: The ratio of the cross-sectional area of ​​the free end of the first side portion in the third direction to the cross-sectional area of ​​the connecting end of the first side portion in the third direction is less than 1 / 3; A ratio of a cross-sectional area of ​​the free end of the second side portion in the third direction to a cross-sectional area of ​​the connecting end of the second side portion in the third direction is less than 1 / 3, wherein the third direction is perpendicular to the first direction and the second direction.

31. The nozzle of claim 30, wherein: The free end of the first side portion gradually converges in a direction away from the main flow portion; the free end of the second side portion gradually converges in a direction away from the main flow portion.

32. The nozzle of claim 24, wherein: A portion of the first side portion close to the main flow portion is perpendicular to the main flow portion, and a portion of the first side portion away from the main flow portion is bent toward the second side portion; A portion of the second side portion close to the main flow portion is perpendicular to the main flow portion, and a portion of the second side portion away from the main flow portion is bent toward the first side portion.

33. The nozzle of claim 24, wherein: The first nozzle and the second nozzle are not arranged directly opposite to each other in the first direction, and the first nozzle is arranged close to the free end of the first side portion, and the second nozzle is arranged close to the free end of the second side portion.

34. The nozzle of claim 24, wherein: The nozzle is a soft rubber part and is projected along the first direction. The projection of the first nozzle and the projection of the second nozzle are spaced apart in the second direction, and the first nozzle is arranged close to the free end of the first side portion. In the second direction, the second nozzle is arranged closer to the middle of the second inner side surface than the first nozzle.

35. The nozzle of claim 24, wherein: The spray bar flow channel has a water outlet for communicating with the main flow channel, and in the first direction, the water outlet is closer to the second side than the first side, so that the distance from the water outlet to the first nozzle is equal to the distance from the water outlet to the second nozzle.

36. The nozzle of claim 24, wherein: Projecting along the first direction, the projection of the first nozzle and the projection of the second nozzle are arranged at an interval, and the distance between the projection of the first nozzle and the projection of the second nozzle is less than or equal to 3 mm.

37. The nozzle of claim 23, wherein: A difference between the first length and the second length is greater than or equal to 2 mm and less than or equal to 12 mm.

38. The nozzle of claim 23, wherein: The first length and the second length are both less than or equal to 8 mm; or, the first length is less than or equal to 6 mm and greater than or equal to 3 mm.

39. The nozzle of claim 38, wherein The thickness of the nozzle in the second direction is a fifth thickness, and the fifth thickness is no greater than 20 mm.

40. The nozzle of claim 1, wherein: The first nozzle faces the accommodating cavity, and the central axis of the first nozzle is arranged at an angle with the first direction and the second direction; and / or, The second nozzle faces the accommodating cavity, and a central axis of the second nozzle is arranged at an angle to both the first direction and the second direction.

41. The nozzle of claim 40, wherein: The center dividing plane of the first side portion is coplanar with the center dividing plane of the second side portion, wherein the center axis of the first nozzle and the center axis of the second nozzle are both parallel to the center dividing plane.

42. The nozzle of claim 40, wherein: The central axis of the first nozzle has a first angle with the second direction, and the central axis of the second nozzle has a second angle with the second direction. The first angle is less than or equal to the second angle, so that the intersection of the central axis of the first nozzle and the central axis of the second nozzle is closer to the second side.

43. The nozzle of claim 40, wherein: The central axis of the first nozzle has a first angle with the second direction, the central axis of the second nozzle has a second angle with the second direction, the first angle is less than or equal to the second angle, and the first angle and the second angle are both greater than or equal to 45 degrees and less than or equal to 90 degrees.

44. The nozzle of claim 1, wherein: The spray bar has a first axis along the first direction, and a plurality of connecting lines are provided between the first nozzle and the second nozzle, and at least one of the connecting lines is in the same plane as the first axis.

45. The nozzle of claim 1, wherein: The first nozzle and the second nozzle are arranged opposite to each other in the first direction or staggered in the second direction.

46. ​​The nozzle of claim 1, wherein: The first nozzle and the second nozzle are both arranged toward the accommodating cavity, and along the first direction, the first nozzle and the second nozzle are not arranged directly opposite to each other.

47. The nozzle of claim 46, wherein Projecting along the first direction, the projection of the first nozzle and the projection of the second nozzle at least partially do not overlap in the second direction.

48. The nozzle of claim 47, wherein The projection of the first nozzle and the projection of the second nozzle are spaced apart in the second direction; or, the projection of the first nozzle and the projection of the second nozzle are spaced apart in the second direction, and the distance between the projection of the first nozzle and the projection of the second nozzle in the second direction is less than or equal to 5 mm.

49. The nozzle of claim 46, wherein: Projecting along the first direction, the projection of the first nozzle and the projection of the second nozzle at least partially do not overlap in a third direction, wherein the third direction is perpendicular to the first direction and the second direction.

50. The nozzle of claim 49, wherein: The projection of the first nozzle and the projection of the second nozzle are spaced apart in the third direction; or, the projection of the first nozzle and the projection of the second nozzle are spaced apart in the third direction, and the distance between the projection of the first nozzle and the projection of the second nozzle in the third direction is less than or equal to 5 mm.

51. The nozzle of claim 49, wherein: The center dividing surface of the first side portion is coplanar with the center dividing surface of the second side portion, so that the first side portion and the second side portion are arranged opposite each other; or, along the first direction, the first side portion and the second side portion are not arranged opposite each other, and the first nozzle is arranged at the middle of the first inner surface in the third direction, and the second nozzle is arranged at the middle of the second inner surface in the third direction.

52. The nozzle of claim 46, wherein: Projecting along the first direction, the projection of the first nozzle and the projection of the second nozzle do not at least partially overlap in the second direction and the third direction, and the projection of the first nozzle and the projection of the second nozzle are spaced apart in the second direction and the third direction, wherein the third direction is perpendicular to the first direction and the second direction in pairs.

53. The nozzle of claim 1, wherein: The nozzle is an elastic member. Along the second direction, the ratio of the distance from the first nozzle to the mainstream portion to the first length is greater than 2 / 3, and the ratio of the distance from the second nozzle to the mainstream portion to the second length is greater than 2 / 3.

54. The nozzle of claim 1, wherein: The aperture of the first nozzle and the aperture of the second nozzle are both greater than or equal to 0.4 mm and less than or equal to 0.7 mm.

55. The nozzle of claim 1, wherein: Along the second direction, the first side portion has a first length relative to the main flow portion, and the second side portion has a second length relative to the main flow portion; The main flow portion has a transition inner surface and a transition outer surface which are arranged opposite to each other, and the transition inner surface is connected to the first inner side surface and the second inner side surface; Wherein, the ratio of the distance from the first nozzle to the transition inner surface to the first length is not less than 0.7 mm and less than 1 mm; or, The ratio of the distance from the second nozzle to the transition inner surface to the second length is not less than 0.7 mm and less than 1 mm; or, The distances between the transition inner surface and the first nozzle and the second nozzle in the second direction are not less than 3 mm.

56. The nozzle of claim 1, wherein: The first side portion has a third thickness in the first direction, the second side portion has a fourth thickness in the first direction, the main portion has a sixth thickness in the second direction, the ratio of the sixth thickness to the third thickness is not less than 2 and not greater than 5, and / or the ratio of the sixth thickness to the fourth thickness is not less than 2 and not greater than 5.

57. The nozzle of claim 1, wherein: The first side portion has a third thickness in the first direction, the second side portion has a fourth thickness in the first direction, the main flow portion has a sixth thickness in the second direction, and at least one of the third thickness and the fourth thickness is smaller than the sixth thickness; And / or, the main flow portion has a sixth thickness in the second direction, and the sixth thickness is not less than 8 mm and not more than 14 mm.

58. The nozzle of claim 1, wherein: The nozzle is constructed in at least one of the following ways: Mode 1: the cross-sectional area of ​​the first flow channel gradually decreases and / or remains unchanged in a direction away from the main flow channel; Mode 2: The cross-sectional area of ​​the second flow channel gradually decreases and / or remains unchanged in a direction away from the main flow channel; Mode three: the cross-sectional area of ​​the main flow channel gradually decreases and / or remains unchanged in a direction away from the spray bar.

59. The nozzle of claim 1, wherein: The first flow channel includes a first flow guide channel and a first outlet flow channel, the first flow guide channel extends along the second direction, one end of the first outlet flow channel is connected to the first flow guide channel, and the other end of the first outlet flow channel is disposed through the first inner side surface; The second flow channel includes a second flow guide channel and a second flow outlet channel, the second flow guide channel extends along the second direction, one end of the second flow outlet channel is connected to the second flow guide channel, and the other end of the second flow outlet channel is disposed through the second inner side surface.

60. The nozzle of claim 59, wherein: The first inner side surface is provided with a first protrusion, and the first outlet flow channel is provided through the first protrusion; The second inner side surface is provided with a second protrusion, and the second outlet flow channel penetrates the second protrusion.

61. The nozzle of claim 59, wherein: The first outlet flow channel comprises a first collecting section, a first transition section and a first pressure reducing section, wherein the first collecting section, the first transition section and the first pressure reducing section are sequentially arranged from inside to outside along the extension direction of the first outlet flow channel, and the cross-sectional area of ​​the first collecting section and the cross-sectional area of ​​the first pressure reducing section are both greater than the cross-sectional area of ​​the first transition section; The second outlet flow channel includes a second collecting section, a second transition section and a second pressure reducing section. The second collecting section, the second transition section and the second pressure reducing section are arranged in sequence from inside to outside along the extension direction of the second outlet flow channel. The cross-sectional area of ​​the second collecting section and the cross-sectional area of ​​the second pressure reducing section are both larger than the cross-sectional area of ​​the second transition section.

62. The nozzle of claim 61, wherein The cross-sectional area of ​​the first current collecting section gradually decreases from the inside to the outside; and the cross-sectional area of ​​the second current collecting section gradually decreases from the inside to the outside.

63. The nozzle of claim 61, wherein The first outlet flow channel is located between the two ends of the first flow guide channel and close to the end of the first flow guide channel away from the main flow channel; the second outlet flow channel is located between the two ends of the second flow guide channel and close to the end of the second flow guide channel away from the main flow channel.

64. The nozzle of claim 1, wherein: The wall thickness of the main channel is not less than 1.5 mm.

65. The nozzle of claim 1, wherein: The main flow portion has a transition inner surface and a transition outer surface arranged opposite to each other, the transition inner surface is connected to the first inner side surface and the second inner side surface; one of the end surface at one end of the main flow portion and the transition outer surface is open and connected to the spray rod, and the other is closed.

66. The nozzle of claim 1, wherein: The main flow portion has a transition inner surface and a transition outer surface which are arranged opposite to each other, the transition inner surface is connected to the first inner side surface and the second inner side surface, the transition outer surface is provided with a process port, the process port is communicated with the main flow channel, and one end of the first flow channel facing the process port and one end of the second flow channel facing the process port are both arranged corresponding to the position of the process port; The nozzle also includes: The sealing portion is constructed as an integrated structure with the main flow portion and is used for sealing the process port.

67. The nozzle of claim 66, wherein: The sealing part is one of an elastic part and a hard part; or, The cross-sectional area of ​​the process port gradually increases or remains unchanged in the direction away from the main channel; or, The main flow portion, the first side portion and the second side portion are formed into an integrated structure by a single injection molding, and the main flow portion and the cover portion are formed into an integrated structure by a second injection molding.

68. The nozzle of claim 66, wherein: The main flow portion and the spray bar are formed into an integrated structure; or, The spray head further comprises a rigid connector, wherein the rigid connector and the main flow portion are formed into an integral structure, and the rigid connector is connected to the spray rod.

69. The nozzle of claim 1, wherein: The nozzle is constructed in at least one of the following ways: Mode 1: From the center of the first side portion in the width direction to the edge of the first side portion in the width direction, the thickness of the first side portion gradually decreases and / or remains unchanged; Mode 2: From the center of the second flow portion in the width direction to the edge of the second flow portion in the width direction, the thickness of the second side portion gradually decreases and / or remains unchanged; Mode 3: From the center of the mainstream portion in the width direction to the edge of the mainstream portion in the width direction, the thickness of the mainstream portion gradually decreases and / or remains unchanged.

70. The nozzle of claim 1, wherein: The spray bar flow channel has a water outlet for communicating with the main flow channel, and the axis of the water outlet passes through the middle of the main flow channel in the extension direction.

71. The nozzle of claim 1, wherein: The main flow portion has a transition inner surface and a transition outer surface which are arranged opposite to each other, the transition inner surface is connected to the first inner side surface and the second inner side surface, the first side portion has a first outer side surface which is opposite to the first inner side surface, and the second side portion has a second outer side surface which is opposite to the second inner side surface; The first inner side surface, the transition inner side surface and the second inner side surface are connected in a smooth transition sequence; and / or the first outer side surface, the transition outer side surface and the second outer side surface are connected in a smooth transition sequence.

72. The nozzle of claim 1, wherein: The nozzle is an elastic member, and along the first direction, a distance between the first inner side surface and the second inner side surface is greater than or equal to 8 mm and less than or equal to 14 mm.

73. The nozzle of claim 1, wherein: The spray bar comprises: a plug-in portion; and A transmission part connected to the plug-in part, wherein one end of the transmission part away from the plug-in part is connected to the main flow part; The main flow portion extends along a fourth direction, the plug portion extends along the first direction, a third angle is formed between the fourth direction and the first direction, and the third angle is not less than 0 degrees and not more than 30 degrees.

74. The nozzle of claim 73, wherein: The mainstream portion is at least partially an elastic member, and has a transition inner surface and a transition outer surface arranged opposite to each other, the transition inner surface is connected to the first inner side surface and the second inner side surface, the transition outer surface is connected to the transmission portion, the transmission portion has a midplane P along the first direction, the spray bar is symmetrical about the midplane P, the spray head has a midplane Q along the fourth direction, the spray head is symmetrical about the midplane Q, and the spacing between the midplane P and the midplane Q and the cross section of the spray head is not less than 0 mm and not more than 2 mm.

75. The nozzle of claim 74, wherein: The plug-in portion extends along a straight line, the transmission portion extends along an arc, the plug-in portion is symmetrical about the midplane P, and the transmission portion is symmetrical about the midplane P; or, The plug-in portion extends along a straight line, the transmission portion extends along a straight line, the plug-in portion is symmetrical about the midplane P, and the transmission portion is symmetrical about the midplane P; or, The plug-in portion extends along a straight line, and the transmission portion is composed of multiple sections connected at angles to each other along the extension direction of the midplane P, so that the spray boom is extended in a fold line.

76. The nozzle of claim 74, wherein: When the central axis of the main flow section coincides with the central axis of the spray bar, the main flow section comprises: a flow channel portion, connected to the first side portion and the second side portion respectively; and A connecting portion, connected to the flow channel portion and the spray bar, respectively, the flow channel portion and the connecting portion are arranged along the extension direction of the main flow portion, and the main flow passes through the flow channel portion and the connecting portion, and the connecting portion is provided with a deformation section at the end away from the spray bar, and the outer surface of the deformation section is provided with a material reduction groove; Among them, the plurality of material reduction grooves are symmetrically distributed about the midplane P, and / or any side of the midplane P includes at least two material reduction grooves, and at least two of the material reduction grooves on any side are arranged at intervals in the first direction.

77. A dental flosser, wherein: include: main body; as well as, The nozzle as described in any one of claims 1 to 76, wherein one end of the spray rod away from the main flow portion is connected to the main body, and the spray rod is in communication with the main body.

78. A method for forming a nozzle, wherein: include: The nozzle is formed into at least a part of the main flow portion, a first side portion and a second side portion, wherein the main flow portion, the first side portion and the second side portion are constructed as an integrated structure, the first side portion and the second side portion are arranged at intervals along the extension direction of the main flow portion and are located on the same side of the main flow portion, and the main flow portion is formed into A main flow channel is formed in the first side portion, a first flow channel is formed in the first side portion, and a second flow channel is formed in the second side portion, wherein the main flow channel is connected to the first flow channel and the second flow channel respectively; A spray bar is formed, and the spray bar is connected to the main flow portion.

79. The method for forming a nozzle according to claim 78, wherein: The main flow portion has a transition inner surface and a transition outer surface that are arranged opposite to each other, and the transition inner surface is connected to the first side portion and the second side portion; The method of forming at least a portion of the main flow portion, the first side portion and the second side portion of the nozzle includes: A part of the main flow portion, the first side portion and the second side portion are formed, a process port is formed on one of the end surface of one end of the main flow portion and the transition outer surface, and a sleeve hole is formed on the other of the end surface of one end of the main flow portion and the transition outer surface; A sealing portion is formed, wherein the sealing portion and the portion of the main flow portion are constructed as an integral structure, and are used to seal the process port, and the spray rod is inserted into the sleeve hole.

80. The method for forming a nozzle according to claim 78, wherein: The main flow portion has a transition inner surface and a transition outer surface that are arranged opposite to each other, and the transition inner surface is connected to the first side portion and the second side portion; The method of forming at least a portion of the main flow portion, the first side portion and the second side portion of the nozzle includes: A part of the main flow section, the first side section and the second side section are formed, a process port is provided on the outer surface of the transition, the process port is communicated with the main flow channel, one end of the first flow channel facing the process port and one end of the second branch flow channel facing the process port are both arranged corresponding to the position of the process port, and a sleeve hole is formed at one end of the main flow section; A sealing portion is formed on the outer surface of the transition portion, and the sealing portion and the portion of the main flow portion are constructed as an integrated structure, and are used to seal the process port, and the spray rod is inserted into the sleeve hole.

81. The method for forming a nozzle according to claim 80, wherein: The sealing portion is formed outside the transition, and the method further comprises: A needle-shaped module is inserted into the main channel, with both ends of the needle-shaped module exceeding the edge of the process port in the extension direction of the main channel, and the needle-shaped module is sealed and matched with the inner wall of the main channel.

82. The method for forming a nozzle according to claim 78, wherein: The main flow portion has a transition inner surface and a transition outer surface that are arranged opposite to each other, and the transition inner surface is connected to the first side portion and the second side portion; The molding of at least a portion of the main flow portion, the first side portion and the second side portion of the nozzle comprises: A part of the main flow portion, the first side portion and the second side portion are formed, an end surface of one end of the main flow portion is provided with a process port, the process port is communicated with the main flow channel, and a sleeve hole is formed on the outer surface of the transition portion; A sealing portion is formed on the end surface of the one end of the main flow portion, and the sealing portion and the part of the main flow portion are constructed as an integrated structure, and are used to seal the process port, and the spray rod is inserted into the sleeve hole.

83. The method for forming a nozzle according to claim 78, wherein: The molded spray bar is connected to the main flow portion and includes: Before forming at least a portion of the main flow portion, the first side portion and the second side portion of the nozzle, a spray bar is formed, and the main flow portion is formed on the spray bar, and the spray bar and the main flow portion are formed into an integrated structure; or After forming at least a portion of the main flow portion, the first side portion and the second side portion of the nozzle, a spray bar is formed on the main flow portion, and the spray bar and the main flow portion are formed into an integrated structure.

84. The method for forming a nozzle according to claim 83, wherein: The step of forming the main flow portion on the spray bar comprises: Inserting a needle-shaped module into the spray bar flow channel of the spray bar, with two ends of the needle-shaped module exceeding two ends of the spray bar; The main flow section is formed on the spray bar, and a part of the needle-shaped module is inserted into the main flow channel; The needle-shaped module is pulled out to connect the main flow channel with the spray bar flow channel.

85. The method for forming a nozzle according to claim 83, wherein: The spray bar is formed on the main flow portion, comprising: Inserting a needle-shaped module into the main channel, wherein one end of the needle-shaped module exceeds the main flow portion; forming a spray bar on the main flow portion, wherein a portion of the needle-shaped module is inserted into the spray bar flow channel; The needle-shaped module is pulled out to connect the main flow channel with the spray bar flow channel.

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