Water Flosser

Abstract

The present invention provides a dental irrigator, which relates to the technical field of oral cavity cleaning. The dental irrigator includes: a buffer cavity, a push-pull module, and a nozzle. A water inlet and a water outlet communicating with the inside and outside are provided on the side wall of the buffer cavity, and a one-way water inlet valve structure is provided at the water inlet, and a one-way water outlet valve structure is provided at the water outlet; the nozzle is connected to the water outlet; at least a part of the side wall of the buffer cavity is a membranous elastic structure, the push-pull module is connected to the outer wall of the membranous elastic structure, and the push-pull module is used to push the membranous elastic structure to move towards the inner side of the buffer cavity or pull the membranous elastic structure towards the outer side of the buffer cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of oral cleaning, and in particular to a dental irrigator. Background Art

[0002] Common dental irrigators on the market use piston pumps to spray water. The piston reciprocates in the cavity. The cavity is provided with a water inlet and a water outlet, and one-way valves are arranged at both the water inlet and the water outlet.

[0003] When the piston moves inward, water will flow into the cavity from the water inlet. When the piston moves outward, the water in the cavity will be sprayed out from the water outlet.

[0004] After long-term use, the sealing performance between the piston and the cavity decreases, and the water pumping and spraying capabilities of the piston pump decrease. Summary of the Invention

[0005] The purpose of the present invention is to provide a dental irrigator to alleviate the technical problems that after long-term use of the existing piston pump type dental irrigator, the sealing performance between the piston and the cavity decreases, and the water pumping and spraying capabilities of the piston pump decrease.

[0006] In a first aspect, a dental irrigator provided by an embodiment of the present invention includes: a buffer cavity, a push-pull module, and a nozzle. The side wall of the buffer cavity is provided with a water inlet and a water outlet that communicate with the inside and outside thereof, and a one-way water inlet valve structure is arranged at the water inlet, and a one-way water outlet valve structure is arranged at the water outlet; the nozzle is connected to the water outlet;

[0007] At least a part of the side wall of the buffer cavity is a membranous elastic structure, the push-pull module is connected to the outer wall of the membranous elastic structure, and the push-pull module is used to push the membranous elastic structure towards the inner side of the buffer cavity or pull the membranous elastic structure towards the outer side of the buffer cavity.

[0008] Further, the push-pull module includes a connecting rod and an eccentric wheel mechanism. The connecting rod includes a first end and a second end. The first end of the connecting rod is connected to the membranous elastic structure; the second end of the connecting rod is connected to the eccentric wheel mechanism, and the eccentric wheel mechanism is used to drive the connecting rod to perform reciprocating push-pull motion.

[0009] Further, the eccentric wheel mechanism includes a motor, a first gear, a second gear, and a fixed shaft. The first gear is connected to the output shaft of the motor. The second gear is an end face gear, and the second gear meshes with the first gear, and the axial direction of the first gear and the axial direction of the second gear are perpendicular;

[0010] An eccentric shaft body protruding outward is arranged on one surface of the second gear, and the axis of the eccentric shaft body is parallel to and spaced from the axis of the second gear; the two ends of the fixed shaft are fixed, and the fixed shaft penetrates through the second gear and the eccentric shaft body along the axial direction of the second gear;

[0011] The second end of the connecting rod is provided with a sleeve, and the sleeve is sleeved on the outside of the eccentric shaft body.

[0012] Further, the pushing and pulling module includes a permanent magnet unit and an electromagnet assembly. The permanent magnet unit is connected to the membranous elastic structure. The two poles of the permanent magnet unit are respectively located at its opposite first end and second end, and the first end is closer to the inner side wall of the membranous elastic structure than the second end.

[0013] The electromagnet assembly is located outside the second end of the permanent magnet unit. The direction of the magnetic field of the electromagnet assembly is adjustable. The electromagnet assembly is used to repel or attract the permanent magnet unit, so that the permanent magnet unit pushes the membranous elastic structure towards the inside of the buffer cavity or pulls the membranous elastic structure towards the outside of the buffer cavity.

[0014] Further, the pushing and pulling module includes a linear driving mechanism. The driving end of the linear driving mechanism is connected to the outer wall of the membranous elastic structure. The linear driving mechanism is used to push the membranous elastic structure towards the inside of the buffer cavity or pull the membranous elastic structure towards the outside of the buffer cavity.

[0015] Further, the membranous elastic structure is recessed outward to form a sac-shaped elastic water bag. The pushing and pulling module includes a driving module, a first squeezing part and a second squeezing part. The elastic water bag is located between the first squeezing part and the second squeezing part. Both the first squeezing part and the second squeezing part are connected to the side wall of the elastic water bag.

[0016] At least one of the first squeezing part and the second squeezing part is connected to the driving module. The driving module is used to drive at least one of the first squeezing part and the second squeezing part to move, so that the distance between the first squeezing part and the second squeezing part increases or decreases.

[0017] Further, the driving module includes an electromagnet member. The first squeezing part includes a first clamping plate, and the second squeezing part includes a second clamping plate.

[0018] The elastic water bag is located between the first clamping plate and the second clamping plate, and the opposite side walls of the elastic water bag are respectively connected to the first clamping plate and the second clamping plate. A first permanent magnet is arranged on the first clamping plate. The electromagnet member attracts or repels the first clamping plate, so that the first clamping plate approaches the second clamping plate and flattens the elastic water bag, or the first clamping plate moves away from the second clamping plate and releases the elastic water bag.

[0019] Further, a second permanent magnet is arranged on the second clamping plate. The first clamping plate and the second clamping plate are respectively located on both sides of the opposite polar ends of the electromagnet member. The electromagnet member is used to apply magnetic forces to the first permanent magnet and the second permanent magnet simultaneously, so that the first clamping plate and the second clamping plate move towards or away from each other.

[0020] Further, the electromagnet member includes a first polar end and a second polar end located at its opposite ends.

[0021] The first clamping plate is provided with a first hinge structure for hinging with the electromagnet component, and a first magnetic attraction part and a first clamping part located on opposite sides of the first hinge structure; the first permanent magnet is arranged on the first magnetic attraction part, and the first magnetic attraction part is located outside the first polar end;

[0022] The second clamping plate is provided with a second hinge structure for hinging with the electromagnet component, and a second magnetic attraction part and a second clamping part located on opposite sides of the second hinge structure; the second permanent magnet is arranged on the first magnetic attraction part, and the second magnetic attraction part is located outside the second polar end;

[0023] The first clamping part and the second clamping part are used to be connected to opposite side walls of the elastic water bag respectively.

[0024] Furthermore, a return spring is connected between the first clamping plate and the second clamping plate, and the return spring has a tendency to move the first clamping plate and the second clamping plate away from each other.

[0025] Furthermore, the dental irrigator includes an upper assembly shell, and a vertical assembly hole penetrating through the upper and lower end faces of the upper assembly shell is arranged on the upper assembly shell;

[0026] A connecting cylinder communicating with the vertical assembly hole and extending downward is arranged at the lower end of the upper assembly shell, and the bottom opening of the connecting cylinder is inserted into the opening of the elastic water bag;

[0027] The dental irrigator includes a tightening member for tightening the elastic water bag on the connecting cylinder.

[0028] Furthermore, the dental irrigator further includes an elastomeric valve member inserted into the buffer cavity;

[0029] The elastomeric valve member includes a cavity penetrating through its upper and lower end faces, and a conical elastic valve is arranged in the cavity. The conical elastic valve includes a conical surface facing the inside of the buffer cavity, and from the inside to the outside, the shape of the cross-section of the conical surface gradually decreases, and a water outlet gap communicating the inner and outer surfaces of the conical elastic valve is opened at the top of the conical surface.

[0030] Furthermore, the water inlet is arranged on the circumferential inner side wall of the buffer cavity. The elastomeric valve member includes a retaining edge at its bottom end, and the retaining edge covers the inside of the water inlet. The retaining edge has elasticity and can deform inward under the action of pressure, and the retaining edge forms a one-way water inlet valve structure.

[0031] Furthermore, an annular base extending inward is arranged on the inner wall of the buffer cavity. The hollow position of the annular base is located above the membranous elastic structure, and the annular base is located below the retaining edge. A guide cylinder concentric with it is arranged on the annular base, and the retaining edge is located between the circumferential outer wall of the guide cylinder and the water inlet.

[0032] Further, a connecting member is connected to the membranous elastic structure. A part of the connecting member is located inside the membranous elastic structure, and the other part is located outside the membranous elastic structure. The part of the connecting member located outside the membranous elastic structure is used to connect with the push-pull module.

[0033] Further, a limiting skirt protruding radially outward is provided on the circumferential side wall of the part of the connecting member located inside the membranous elastic structure, so that a stepped structure is formed on the connecting member. There is a stepped hole corresponding to the stepped structure inside the membranous elastic structure, and the stepped structure is located in the stepped hole.

[0034] Further, the push-pull module is detachably connected to the connecting member.

[0035] Further, the oral irrigator includes an upper assembly shell and a lower assembly shell, and the lower end surface of the upper assembly shell is docked with the upper end surface of the lower assembly shell;

[0036] A peripheral edge of the membranous elastic structure is provided with a surrounding edge extending along the axial direction of the membranous elastic structure, and the surrounding edge is annular;

[0037] A recessed structure is provided on the lower end surface of the upper assembly shell and / or the upper end surface of the lower assembly shell, and the surrounding edge is press-fitted into the recessed structure.

[0038] Further, the oral irrigator includes a core body arranged inside the upper assembly shell. A cavity is provided inside the core body, and a water inlet pipe communicating with the cavity is connected to the side wall of the core body;

[0039] The water inlet is arranged on a surface of the core body facing the membranous elastic structure. The one-way water inlet valve structure includes an umbrella-shaped valve, and the umbrella surface of the umbrella-shaped valve covers the water inlet;

[0040] There is a diversion gap between the circumferential side wall of the core body and the circumferential inner wall of the upper assembly shell, and the diversion gap communicates with the water outlet.

[0041] Further, the nozzle includes a nozzle body. A channel for fluid to pass through is provided inside the nozzle body, and a limiting stop portion is provided on the inner wall surface of the nozzle body. The limiting stop portion forms a limiting surface facing the fixed end of the nozzle body inside the channel.

[0042] Further, the channel includes a first channel and a second channel that are connected to each other and arranged in sequence along the length direction of the nozzle body. The inner diameter of the first channel is larger than that of the second channel, and a step is formed at the connection between the first channel and the second channel, and the step serves as the limiting stop portion.

[0043] Further, the oral irrigator further includes an upper assembly shell and a joint. An inlet interface communicating with the buffer cavity is provided inside the upper assembly shell, and a clamping platform is arranged on the inner side wall of the inlet interface along the circumference of the inlet interface;

[0044] The one-way water inlet valve structure is installed inside the water inlet interface. The one-way water inlet valve structure includes a fixed ring piece and a valve piece. The fixed ring piece is arranged in a ring shape. The valve piece is arranged in the annular space of the fixed ring piece. One end of the valve piece is a fixed end, and the fixed end is fixedly connected to the inner wall of the annular fixed ring piece. The other end of the valve piece is a free end, and the free end is spaced from the inner wall of the fixed ring piece. The fixed ring piece is installed on the clamping platform.

[0045] The joint is sleeved inside the water inlet interface and abuts against the side of the fixed ring piece away from the clamping platform to fix the fixed ring piece between the joint and the clamping platform. The valve piece is arranged corresponding to the water outlet of the joint. The free end of the valve piece can swing inwards with the fixed end of the valve piece as the axis under the action of the pressure difference on both sides.

[0046] Further, the outer contour line of the fixed ring piece includes an arc-shaped side and a straight side. The arc-shaped side and the straight side are connected end to end to form a closed loop. The fixed end of the valve piece is correspondingly connected to the inner side of the straight side.

[0047] A convex portion matching the straight side is arranged on the side of the clamping platform facing the one-way water inlet valve structure. The convex portion is used to position the installation position of the fixed ring piece.

[0048] Further, the one-way water outlet valve structure includes an elastic valve body. One end of the elastic valve body is provided with an inlet, and the other end of the elastic valve body is provided with an elastic control portion. A crack is arranged on the elastic control portion. A valve body cavity is arranged in the elastic valve body between the inlet and the crack. The side walls of the elastic valve body on both sides of the crack are the first side walls. The first side walls are recessed into an arc shape towards the inside of the valve body cavity along the circumferential direction of the elastic valve body.

[0049] The crack is in a closed state in the natural state, and the elastic control portion can elastically deform under the action of the pressure difference inside and outside the valve body cavity to open the crack.

[0050] Further, the oral irrigator includes a housing. A storage hole is arranged on the housing, and the storage hole is used to accommodate the nozzle.

[0051] Further, the oral irrigator further includes a cover body, and the cover body is used to cover the storage hole.

[0052] The water flosser provided by the embodiment of the present invention includes: a buffer cavity, a push-pull module, and a nozzle. The side wall of the buffer cavity is provided with a water inlet and a water outlet that communicate with the inside and outside thereof, and a one-way water inlet valve structure is arranged at the water inlet, and a one-way water outlet valve structure is arranged at the water outlet; the nozzle is connected to the water outlet; at least a part of the side wall of the buffer cavity is a membranous elastic structure, the push-pull module is connected to the outer wall of the membranous elastic structure, and the push-pull module is used to push the membranous elastic structure toward the inside of the buffer cavity or pull the membranous elastic structure toward the outside of the buffer cavity. When in use, the push-pull assembly reciprocally pushes and pulls the membranous elastic structure. When the push-pull mechanism pulls the membranous elastic structure from the inside to the outside, the membranous elastic structure can be deformed toward the outside of the buffer cavity, so that the volume inside the buffer cavity increases, and the water outside can enter the buffer cavity from the water inlet through the one-way water inlet valve structure; when the push-pull mechanism pushes the membranous elastic structure from the outside to the inside, the membranous elastic structure can be deformed toward the inside of the buffer cavity, so that the volume inside the buffer cavity decreases, and the water outside can be ejected from the water outlet through the one-way water outlet valve structure. In this embodiment, the volume of the buffer cavity is changed by using the membranous elastic structure with a certain amount of deformation, and then the pressure inside the buffer cavity is changed, so as to realize the pumping and spraying actions of the buffer cavity. The push-pull mechanism is located outside the buffer cavity, and the overall sealing performance of the buffer cavity is better, which improves the service life of the water flosser. Description of the Drawings

[0053] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0054] Figure 1 The front view of the water flosser provided by Embodiment 1 of the present invention;

[0055] Figure 2 is Figure 1 the cross-sectional view in the direction of A-A in

[0056] Figure 3 The top view of the water flosser provided by Embodiment 1 of the present invention;

[0057] Figure 4 is Figure 3 the cross-sectional view in the direction of B-B in

[0058] Figure 5 is Figure 3 the cross-sectional view in the direction of C-C in

[0059] Figure 6 is Figure 5Partial enlarged view of position F;

[0060] Figure 7 is Figure 3 Cross-sectional view in the D - D direction of;

[0061] Figure 8 Schematic diagram of the nozzle of the oral irrigator provided by the embodiment of the present invention;

[0062] Figure 9 is Figure 8 Cross-sectional schematic view of;

[0063] Figure 10 is Figure 9 Enlarged view of part G of;

[0064] Figure 11 Schematic diagram of the communication groove of the nozzle of the oral irrigator provided by the embodiment of the present invention;

[0065] Figure 12 Schematic diagram of the upper assembly shell and the joint of the oral irrigator provided by the embodiment of the present invention;

[0066] Figure 13 is Figure 12 Top view of;

[0067] Figure 14 is Figure 13 Cross-sectional view in the H - H direction of;

[0068] Figure 15 Schematic diagram of the upper assembly shell of the oral irrigator provided by the embodiment of the present invention;

[0069] Figure 16 Schematic diagram of the valve piece of the oral irrigator provided by the embodiment of the present invention;

[0070] Figure 17 Schematic diagram of the one-way water outlet valve of the oral irrigator provided by the embodiment of the present invention;

[0071] Figure 18 is Figure 17 Top view schematic diagram of;

[0072] Figure 19 is Figure 17 Side view schematic diagram of;

[0073] Figure 20 Schematic diagram of the oral irrigator provided by the embodiment of the present invention;

[0074] Figure 21 Schematic diagram of the oral irrigator before the nozzle is stored;

[0075] Figure 22 Schematic diagram of the oral irrigator after the nozzle is stored;

[0076] Figure 23 The cross-sectional view of the oral irrigator provided in Embodiment 2 of the present invention;

[0077] Figure 24 The cross-sectional view of the oral irrigator provided in Embodiment 3 of the present invention;

[0078] Figure 25 The cross-sectional view of the position of the baffle when the oral irrigator provided in Embodiment 3 of the present invention is filling with water;

[0079] Figure 26 The schematic diagram of the oral irrigator provided in Embodiment 4 of the present invention;

[0080] Figure 27 The top view of the oral irrigator provided in Embodiment 4 of the present invention;

[0081] Figure 28 is Figure 27 the cross-sectional view in the direction of G-G in

[0082] Figure 29 is Figure 27 the cross-sectional view in the direction of K-K in

[0083] Icons: 1100 - film-like elastic structure; 1110 - peripheral edge; 1210 - motor; 1220 - first gear; 1230 - second gear; 1231 - eccentric shaft body; 1240 - fixed shaft; 1300 - connecting rod; 1310 - sleeve; 1400 - connecting piece; 1510 - upper assembly shell; 1520 - lower assembly shell; 1600 - core body; 1610 - water inlet; 1700 - one-way water outlet valve; 1800 - diversion gap; 1900 - umbrella valve; 2100 - spray head; 2110 - spray head body; 2111 - fixing part; 2112 - guiding inclined surface; 2113 - limiting stop part; 2114 - limiting surface; 2115 - notch groove; 2116 - protruding part; 2120 - cavity; 2121 - first cavity; 2122 - second cavity; 2130 - communicating groove; 2131 - liquid outlet; 3101 - flow channel; 3103 - clamping platform; 3104 - positioning part; 3105 - limiting platform; 3106 - limiting column; 3107 - water inlet interface; 3108 - sealing ring; 3200 - joint; 3210 - lug; 3220 - cylindrical fixing piece; 3300 - one-way water inlet valve structure; 3310 - fixing ring piece; 3311 - circular arc edge; 3312 - straight edge; 3320 - valve piece; 3330 - gap; 4100 - elastic valve body; 4101 - first side wall; 4102 - second side wall; 4103 - valve body cavity; 4200 - elastic control part; 4201 - crack; 4300 - fixing ring; 5100 - outer shell; 5110 - water outlet; 5120 - receiving hole; 5130 - counterbore; 5300 - cover body; 6210 - permanent magnet unit; 6220 - insulating bracket; 6230 - silicon steel sheet; 6240 - coil winding; 7200 - linear drive mechanism; 7400 - elastic valve member; 7410 - conical elastic valve; 7420 - retaining edge; 7510 - annular base; 7520 - guide cylinder; 8100 - elastic water bag; 8110 - limiting protrusion; 8210 - electromagnet component; 8220 - first clamping plate; 8221 - first magnetic attraction part; 8222 - first clamping part; 8230 - second clamping plate; 8231 - second magnetic attraction part; 8232 - second clamping part; 8300 - return spring; 8410 - connecting cylinder; 8420 - tightening piece; 8421 - limiting step structure. Detailed implementation manners

[0084] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0085] Embodiment 1

[0086] AsFigure 1 - Figure 7 As shown in Figure 7 , the water flosser provided by the embodiment of the present invention includes: a buffer cavity, a push-pull module, and a nozzle 2100. An inlet 1610 and an outlet 5110 communicating with the inside and outside are provided on the side wall of the buffer cavity. A one-way inlet valve structure 3300 is provided at the inlet 1610, and a one-way outlet valve 1700 structure is provided at the outlet 5110; the nozzle 2100 is connected to the outlet 5110; wherein, the one-way inlet valve structure 3300 can be opened when the internal pressure of the buffer cavity is less than the external pressure, and the one-way outlet valve 1700 structure can be opened when the internal pressure of the buffer cavity is greater than the external pressure.

[0087] As Figure 6 shown in Figure 6 , at least a part of the side wall of the buffer cavity is a membranous elastic structure 1100. The push-pull module is connected to the outer wall of the membranous elastic structure 1100, and the push-pull module is used to push the membranous elastic structure 1100 towards the inside of the buffer cavity or pull the membranous elastic structure 1100 towards the outside of the buffer cavity. During use, the push-pull assembly is used to reciprocally push and pull the membranous elastic structure 1100. When the push-pull mechanism pulls the membranous elastic structure 1100 from the inside to the outside, the membranous elastic structure 1100 can be deformed towards the outside of the buffer cavity, increasing the internal volume of the buffer cavity. External water can enter the buffer cavity from the inlet 1610 through the one-way inlet valve structure 3300; when the push-pull mechanism pushes the membranous elastic structure 1100 from the outside to the inside, the membranous elastic structure 1100 can be deformed towards the inside of the buffer cavity, reducing the internal volume of the buffer cavity, and the external water can be sprayed out from the outlet 5110 through the one-way outlet valve 1700 structure. In this embodiment, the membranous elastic structure 1100 with a certain deformation amount is used to change the volume of the buffer cavity, thereby changing the pressure inside the buffer cavity, and thus realizing the pumping and spraying actions of the buffer cavity. The push-pull mechanism is located outside the buffer cavity, and the overall sealing performance of the buffer cavity is better, improving the service life of the water flosser.

[0088] In some implementable solutions, the membranous elastic structure 1100 can be a flat sheet structure. An installation window is provided on the buffer cavity, and the membranous elastic structure 1100 is blocked at the installation window. Other positions of the side wall of the buffer cavity except the membranous elastic structure 1100 can be made of a rigid material, such as plastic.

[0089] As Figure 4As shown in the figure, the push-pull module may include a connecting rod 1300 and an eccentric wheel mechanism. The connecting rod 1300 includes a first end and a second end. The first end of the connecting rod 1300 is connected to the membranous elastic structure 1100; the second end of the connecting rod 1300 is connected to the eccentric wheel mechanism, and the eccentric wheel mechanism is used to drive the connecting rod 1300 to perform reciprocating push-pull motion. When the eccentric wheel structure in the eccentric wheel mechanism rotates, it can drive the connecting rod 1300 to perform reciprocating push-pull motion. The faster the rotation speed, the higher the deformation frequency of the membranous elastic structure 1100, thereby causing the water outlet 5110 to produce a high-frequency water spraying effect.

[0090] As Figure 4 shown in the figure, specifically, the eccentric wheel mechanism includes a motor 1210, a first gear 1220, a second gear 1230 and a fixed shaft 1240. The first gear 1220 is connected to the output shaft of the motor 1210. The second gear 1230 is an end face gear. The second gear 1230 meshes with the first gear 1220, and the axial direction of the first gear 1220 is perpendicular to the axial direction of the second gear 1230; an eccentric shaft body 1231 protruding outward is provided on one surface of the second gear 1230, and the axis of the eccentric shaft body 1231 is parallel to and spaced from the axis of the second gear 1230; both ends of the fixed shaft 1240 are fixed, and the fixed shaft 1240 penetrates through the second gear 1230 and the eccentric shaft body 1231 along the axial direction of the second gear 1230; a sleeve 1310 is provided at the second end of the connecting rod 1300, and the sleeve 1310 is sleeved outside the eccentric shaft body 1231.

[0091] The eccentric wheel mechanism is located below the membranous elastic structure 1100, and the axial direction of the output shaft of the motor 1210 is parallel to the length direction of the oral irrigator. The second gear 1230 is vertically placed, and its end face faces the side of the oral irrigator for transmitting the torque of the motor 1210. The oral irrigator includes a lower assembly shell 1520. Both ends of the fixed shaft 1240 are respectively fixedly connected to the opposite inner side surfaces of the lower assembly shell 1520. When the second gear 1230 rotates around the fixed shaft 1240, the axis of the eccentric shaft body 1231 on the second gear 1230 performs eccentric rotation, driving the sleeve sleeved on the eccentric shaft body 1231 to perform reciprocating motion in the up and down direction, so that the first end of the connecting rod 1300 realizes the push-pull action on the membranous elastic structure 1100. The transmission of the power of the motor 1210 is realized by using the first gear 1220, the second gear 1230 and the fixed shaft 1240. The structure is simple, the design is ingenious, and the occupied space is small, which can make the volume of the oral irrigator smaller.

[0092] As Figure 24 and Figure 25As shown, the oral irrigator further includes an elastomeric valve member 7400, which is inserted into the buffer cavity; the elastomeric valve member 7400 includes a cavity penetrating its upper and lower end faces, and a conical elastic valve 7410 is arranged in the cavity. The conical elastic valve 7410 includes a conical surface facing the inside of the buffer cavity, and from the inside to the outside, the shape of the cross-section of the conical surface gradually decreases, and a water outlet gap communicating the inner and outer surfaces of the conical elastic valve 7410 is provided at the top of the conical surface.

[0093] There is a vertical assembly hole in the buffer cavity. The elastomeric valve member 7400 is inserted into the vertical assembly hole, and a conical elastic valve 7410 is arranged in the elastomeric valve member 7400. When the internal pressure is greater than the external pressure, the two inner side walls of the conical elastic valve 7410 are pressured and gradually separated, so that the water outlet gap is opened and water can be ejected. When the pressure in the buffer cavity becomes smaller, the water outlet gap closes under the self-deformation recovery of the conical elastic valve 7410.

[0094] The water inlet 1610 is arranged on the circumferential inner side wall of the buffer cavity. The elastomeric valve member 7400 includes a retaining edge 7420 at its bottom end. The retaining edge 7420 covers the inside of the water inlet 1610. The retaining edge 7420 has elasticity and can deform inward under the action of pressure. The retaining edge 7420 forms a one-way water inlet valve structure 3300.

[0095] The retaining edge 7420 is tightly attached to the circumferential inner side wall of the buffer cavity in the natural state, and the retaining edge 7420 can block the water inlet 1610 on the upper assembly shell 1510 that communicates the inside and outside. However, due to the elasticity of the retaining edge 7420, when the pressure in the buffer cavity is less than the external pressure, the retaining edge 7420 can bend away from the water inlet 1610, thus opening the water inlet 1610, and the external water can enter the buffer cavity. Therefore, the retaining edge 7420 can form a one-way water inlet valve for the water inlet 1610. The retaining edge 7420 is part of the elastomeric valve member 7400. Therefore, both the one-way water inlet valve and the one-way water outlet valve 1700 are located on the same component, simplifying the structure of the oral irrigator.

[0096] An annular base 7510 extending inward is arranged on the inner wall of the buffer cavity. The hollow position of the annular base 7510 is above the membranous elastic structure 1100, and the annular base 7510 is below the retaining edge 7420. A guide cylinder 7520 concentric with it is arranged on the annular base 7510, and the retaining edge 7420 is located between the circumferential outer wall of the guide cylinder 7520 and the water inlet 1610.

[0097] As Figure 26As shown, when the external pressure is greater than the internal pressure, the retaining edge 7420 opens, and water can flow in from the water inlet 1610. Then, it moves upward after passing through the upper surface of the annular base 7510 and the outer wall of the flow guide cylinder 7520, flows downward after passing over the flow guide cylinder 7520, and is stored above the membranous elastic structure 1100 in the buffer cavity. When the internal pressure is greater than the external pressure, the water in the buffer cavity will flow upward along the inner wall side of the flow guide cylinder 7520 to the one-way water outlet valve 1700. The retaining edge 7420 is located between the flow guide cylinder 7520 and the water inlet 1610. The annular base 7510 and the flow guide cylinder 7520 are arranged to prevent the water at the retaining edge 7420 from being accidentally washed open when discharging water, and the pressure at the water outlet 5110 is reduced.

[0098] As Figure 4 - Figure 6 As shown, a connecting member 1400 is connected to the membranous elastic structure 1100. A part of the connecting member 1400 is located inside the membranous elastic structure 1100, and the other part is located outside the membranous elastic structure 1100. The part of the connecting member 1400 located outside the membranous elastic structure 1100 is used to connect with the push-pull module.

[0099] A part of the connecting member 1400 can be embedded into the membranous elastic structure 1100, thereby increasing the connection strength between the connecting member 1400 and the membranous elastic structure 1100. Specifically, the membranous elastic structure 1100 can be formed by injection molding, and a part of the connecting member 1400 can be placed in the mold for injecting the membranous elastic structure 1100 in advance. After the membranous elastic structure 1100 is cured, a part of the connecting member 1400 is naturally embedded into the membranous elastic structure 1100.

[0100] On the circumferential side wall of the part of the connecting member 1400 located inside the membranous elastic structure 1100, a limiting skirt protruding radially outward is provided, so that a stepped structure is formed on the connecting member 1400. The membranous elastic structure 1100 has a stepped hole corresponding to the stepped structure, and the stepped structure is located in the stepped hole. The stepped structure of the connecting member 1400 located inside the membranous elastic structure 1100 is clamped inside the membranous elastic structure 1100. Blocked by the stepped hole, the connecting member 1400 cannot be taken out unless the membranous elastic structure 1100 is damaged, further increasing the connection firmness between the connecting member 1400 and the membranous elastic structure 1100, so as to better adapt to the high-frequency reciprocating motion of the push-pull module.

[0101] The push-pull module oral irrigator is detachably connected to the connecting member 1400. Taking the first embodiment as an example, where the push-pull module includes a connecting rod 1300, the first end of the connecting rod 1300 can be threadedly connected to the connecting member 1400.

[0102] As Figure 6As shown, the oral irrigator includes an upper assembly shell 1510 and a lower assembly shell 1520, and the lower end surface of the upper assembly shell 1510 is connected to the upper end surface of the lower assembly shell 1520; the circumferential edge of the membrane-like elastic structure 1100 is provided with a circle of surrounding edges 1110 extending along the axial direction of the membrane-like elastic structure 1100, and the surrounding edges 1110 are annular; the lower end surface of the upper assembly shell 1510 and / or the upper end surface of the lower assembly shell 1520 are provided with a recessed structure, and the surrounding edges 1110 are crimped into the recessed structure.

[0103] The push-pull mechanism is located in the lower assembly shell 1520, the cache cavity is located in the upper assembly shell 1510, the membrane-like elastic structure 1100 is located between the upper assembly shell 1510 and the lower assembly shell 1520, and the edge of the membrane-like elastic structure 1100 is crimped between the upper assembly shell 1510 and the lower assembly shell 1520. In order to increase the connection firmness between the membrane-like elastic structure 1100 and the upper and lower assembly shells 1520, a recessed structure can be provided on the end surface of the upper assembly shell 1510 facing the lower assembly shell 1520, or a recessed structure can be provided on the end surface of the lower assembly shell 1520 facing the upper assembly shell 1510, or a recessed structure can be provided on the end surfaces of the upper assembly shell 1510 and the lower assembly shell 1520 that contact each other. When the end faces of the upper assembly shell 1510 and the lower assembly shell 1520 are butted against each other, the surrounding edge 1110 on the membrane-like elastic structure 1100 can be limited in the recessed structure to prevent the membrane-like elastic structure 1100 from moving in its radial direction. On the other hand, because the membrane-like elastic structure 1100 itself is elastic, the surrounding edge 1110 can form a sealing structure to increase the sealing between the upper assembly shell 1510 and the membrane-like elastic structure 1100.

[0104] like Figure 6 As shown, the water flosser includes a core body 1600 arranged inside an upper assembly shell 1510, the core body 1600 has a cavity, and a water inlet pipe connected to the cavity is connected to the side wall of the core body 1600; the water inlet 1610 is arranged on the side of the core body 1600 facing the membrane elastic structure 1100, and the one-way water inlet valve structure 3300 includes an umbrella valve 1900, and the umbrella surface of the umbrella valve 1900 covers the water inlet 1610; there is a guide gap 1800 between the circumferential side wall of the core body 1600 and the circumferential inner wall of the upper assembly shell 1510, and the guide gap 1800 is connected to the water outlet 5110.

[0105] In order to make full use of the space inside the upper assembly shell 1510 and reduce the volume of the oral irrigator, the core body 1600 can be arranged inside the upper assembly shell 1510. The umbrella valve 1900 is connected to the bottom surface of the core body 1600. There are water inlets 1610 on the bottom surface of the core body 1600, and the number of water inlets 1610 can be multiple. The curved umbrella surface of the umbrella valve 1900 can cover all the water inlets 1610. External water can first enter the cavity of the core body 1600 through the water inlet pipe. Then, when the membranous elastic structure 1100 deforms outward, the umbrella surface of the umbrella valve 1900 bends and deforms away from the core body 1600, and the water inlets 1610 are opened. The water in the cavity of the core body 1600 can enter the space between the upper assembly shell 1510 and the membranous elastic structure 1100 through the water inlets 1610. The side wall of the core body 1600 and the inner wall of the upper assembly shell 1510 can be connected by multiple connecting arms. There is a diversion gap 1800 reserved between the side wall of the core body 1600 and the inner wall of the shell. When the membranous elastic structure 1100 bends and deforms toward the inside of the buffer cavity, the umbrella valve 1900 bends and deforms toward the bottom surface side of the core body 1600, and the water inlet holes can be closed again. The water between the upper assembly shell 1510 and the membranous elastic structure 1100 can move upward and be ejected after passing through the one-way water outlet valve 1700 structure.

[0106] As Figure 8 - Figure 11 shown, the nozzle 2100 includes a nozzle body 2110. A channel 2120 for fluid to pass through is arranged inside the nozzle body 2110. A limiting stop portion 2113 is arranged on the inner wall surface of the nozzle body 2110. The limiting stop portion 2113 forms a limiting surface 2114 facing the fixed end of the nozzle body 2110 inside the channel 2120.

[0107] As Figure 8 - Figure 10As shown, the fixed end of the nozzle body 2110, which is the end where the nozzle body 2110 is connected to other components. Usually, the fluid inlet end of the nozzle 2100 is the fixed end of the nozzle body 2110, and the fixed end is connected to the upstream mechanism (the upstream mechanism is the mechanism that stores or transports fluid and is directly connected to the nozzle 2100). Taking the application in a dental irrigator as an example, the upstream mechanism is the body of the dental irrigator, specifically the pump body of the dental irrigator in this embodiment. The fixed end of the nozzle body 2110 is also the end where the nozzle 2100 is connected to the body of the dental irrigator. When the nozzle 2100 is broken, through auxiliary components such as chopsticks and cotton swabs, the nozzle body 2110 can be quickly and conveniently taken out from other components it is connected to. Taking the nozzle 2100 in this embodiment applied to a dental irrigator as an example, when the nozzle 2100 is broken, insert auxiliary components such as chopsticks and cotton swabs into the cavity 2120 of the nozzle body 2110 remaining in the body, and act on the limiting surface 2114. Since the limiting surface 2114 faces the fixed end of the nozzle body 2110, the limiting surface 2114 can be used as an abutting stop, so that the end of the auxiliary component away from the consumer is stuck on the limiting surface 2114. At this time, by dragging the auxiliary component, the nozzle body 2110 remaining in the body can be taken out, which is convenient and fast to operate, improving the user experience of consumers. Moreover, due to the improved convenience and success rate of taking out the nozzle 2100 remaining in the body, the replacement success rate of the nozzle 2100 is increased, correspondingly improving the service life of the body of the dental irrigator.

[0108] It should be noted that in some special cases, the nozzle 2100 may also be connected to other components at the fluid outlet end. At this time, the fluid outlet end is the fixed end, and the corresponding limiting surface 2114 faces the side where the fluid outlet is located. As Figure 9 and Figure 10 shown, the nozzle 2100 in this embodiment is mainly described by taking the application in a dental irrigator as an example. Specifically, the fluid inlet end of the nozzle body 2110 is fixedly connected to the upstream mechanism, that is, the pump body of the body. The limiting stop portion 2113 forms a limiting surface 2114 at one end facing the fluid inlet of the nozzle body 2110 in the cavity 2120.

[0109] Among them, the limiting stop portion 2113 can be formed by the inner wall surface of the nozzle body 2110 protruding inward. The limiting stop portion 2113 can be integrally injection-molded with the nozzle body 2110. The limiting stop portion 2113 protrudes inward relative to the inner wall surface of the overall nozzle 2100. At this time, the limiting stop portion 2113 can form limiting surfaces 2114 on both sides in the length direction of the nozzle body 2110, so that it can be applied to the working conditions where both ends of the nozzle 2100 are fixed or any one end is fixed.

[0110] The limiting stop portion 2113 can also be formed by the inner wall surface of the nozzle body 2110 through a diameter change. Specifically, as Figure 9and Figure 10 As shown in Figure 10 , the cavity 2120 includes a first cavity 2121 and a second cavity 2122 that are interconnected and arranged in sequence along the length direction of the nozzle body 2110. The inner diameter of the first cavity 2121 is larger than that of the second cavity 2122. A step is formed at the connection between the first cavity 2121 and the second cavity 2122, and the step serves as the limiting stop portion 2113. Among them, as Figure 10 shown in Figure 10 , corresponding to the connection method between the fluid inlet end of the nozzle body 2110 and the body of the flusher, the first cavity 2121 is arranged close to the body of the oral irrigator, so that the step surface formed by the step, that is, the limiting surface 2114, faces the first cavity 2121, which is convenient for removing the residual nozzle 2100 in the body through auxiliary components such as cotton swabs and chopsticks.

[0111] It should be noted that in this embodiment, the inner diameter of the first cavity 2121 is the same, and the outer diameter is also the same, which is convenient for the connection between the nozzle body 2110 corresponding to the first cavity 2121 and the body. Along the fluid flow direction of the second cavity 2122, both the inner diameter and the outer diameter can gradually decrease, so as to improve the impact force of the fluid and the aesthetics of the nozzle body 2110. At the fluid outlet of the second cavity 2122, that is, at the fluid outlet of the cavity 2120, the cavity 2120 is approximately conical, and the tip of the cone corresponds to the fluid outlet, which is beneficial to improving the impact force of the fluid ejected by the nozzle 2100.

[0112] As Figure 10 shown in Figure 10 , the limiting surface 2114 on the side of the limiting stop portion 2113 facing the fluid inlet in this embodiment can be perpendicular to the length direction of the nozzle body 2110, that is, the axial direction, so that the auxiliary component can abut on the limiting surface 2114.

[0113] The limiting stop portion 2113 in this embodiment can be locally provided on the inner wall surface of the nozzle body 2110, or as Figure 9 and Figure 10 shown in Figure 10 , the limiting stop portion 2113 is arranged in a ring shape around the circumferential direction of the inner wall surface of the nozzle body 2110. Among them, when the limiting stop portion 2113 is arranged in a ring shape around the circumferential direction of the inner wall surface of the nozzle body 2110, it is more convenient for consumers to remove the residual nozzle 2100.

[0114] As Figure 5 and Figure 6 shown in Figure 6 , a fixing portion 2111 is provided at one end of the nozzle body 2110. The fixing portion 2111 is used to insert into the water outlet 5110 so that the nozzle body 2110 is connected to the buffer cavity, and the limiting stop portion 2113 is arranged on the inner wall surface of the nozzle body 2110 corresponding to the position of the fixing portion 2111.

[0115] Among them, the fixing part 2111 is arranged corresponding to the first channel 2121, and the fixing part 2111 is generally a part of the nozzle body 2110. As Figure 9 and Figure 10 shown, the lower end of the nozzle body 2110 is the fixing part 2111, and a guiding inclined surface 2112 is arranged on the outer side of the lower edge of the fixing part 2111 to facilitate the insertion of the fixing part 2111 into the water outlet 5110. The fixing part 2111 is inserted into the water outlet 5110, so that when the nozzle 2100 breaks, the remaining part located in the fuselage is usually the fixing part 2111. The limiting and blocking part 2113 is arranged on the inner wall surface of the nozzle body 2110 corresponding to the position of the fixing part 2111, so as to ensure that when the nozzle 2100 breaks, the remaining part of the nozzle 2100 carries the limiting and blocking part 2113 to ensure the smooth removal of the remaining part.

[0116] Furthermore, a plurality of limiting and blocking parts 2113 are arranged at intervals along the length direction of the nozzle body 2110.

[0117] It can be understood that a plurality of limiting and blocking parts 2113 are arranged, so that when the nozzle 2100 breaks, consumers can reasonably select the limiting and blocking parts 2113 that can abut, without being limited by the position of a single limiting and blocking part 2113, thereby further improving the convenience of removing the remaining part of the nozzle 2100.

[0118] Furthermore, as Figure 4 shown, the nozzle body 2110 is provided with a communication groove 2130 corresponding to the fluid outlet of the channel 2120. The bottom of the communication groove 2130 is communicated with the fluid outlet of the channel 2120, and liquid outlets 2131 are arranged on the side wall of the communication groove 2130.

[0119] The communication groove 2130 is integrally formed with the nozzle body 2110. The liquid outlets 2131 on the side wall of the communication groove 2130 can be one or more. In this embodiment, there are two oppositely arranged ones. When using the oral irrigator, consumers often abut the nozzle 2100 against the muscles or teeth in the oral cavity, which sometimes hinders the water outlet of the nozzle 2100. In this embodiment, by arranging the communication groove 2130 on the nozzle 2100 and the side wall of the communication groove 2130 is open, it can ensure that the water flows out from the side, so as to impact and wash the teeth or oral cavity, improving the impact efficiency and greatly enhancing the convenience of using the oral irrigator.

[0120] In this embodiment, a notch groove 2115 is arranged on the outer wall surface of the nozzle body 2110 of the nozzle 2100, and the notch groove 2115 is arranged in an annular shape along the circumferential direction of the nozzle body 2110.

[0121] As Figure 8 and Figure 9As shown, the notch groove 2115 is provided on the side of the fixing part 2111 away from the pump body. The notch groove 2115 can increase the flexibility of the nozzle 2100 in the axial direction. When the nozzle 2100 drops or collides, it plays a certain buffering role and improves the anti-impact ability of the nozzle 2100.

[0122] To facilitate the installation or disassembly of the nozzle 2100, as Figure 8 and Figure 9 shown, a protruding part 2116 is provided on the outer wall surface of the nozzle body 2110 of this embodiment.

[0123] Specifically, the protruding part 2116 is provided on the side of the notch groove 2115 away from the fixing part 2111. The protruding part 2116 is arranged in a ring along the outer peripheral surface of the nozzle body 2110. The side of the protruding part 2116 facing the fluid outlet of the nozzle 2100 is an arc surface, and the end of the protruding part 2116 facing the fixing part 2111, that is, facing the fluid inlet, is a plane, and this plane is perpendicular to the axial direction of the nozzle body 2110.

[0124] When installing the nozzle 2100, the consumer holds the arc surface of the protruding part 2116 of the nozzle 2100 and inserts the fixing part 2111 of the nozzle 2100 into the water outlet 5110 with force; when disassembling the nozzle 2100, the consumer buckles the hand on the plane of the protruding part 2116 and pulls out the nozzle 2100 outward with force. On the plane side of the protruding part 2116, it is more convenient for the hand to apply force when inserting and removing the nozzle 2100.

[0125] As Figure 12 - Figure 16 shown, the oral irrigator further includes an upper assembly housing 1510 and a joint 3200. An inlet interface 3107 communicating with the buffer cavity is provided in the upper assembly housing 1510. A clamping platform 3103 is arranged on the inner side wall of the inlet interface 3107 along the circumferential direction of the inlet interface 3107; a one-way water inlet valve structure 3300 is installed in the inlet interface 3107. The one-way water inlet valve structure 3300 includes a fixed ring piece 3310 and a valve piece 3320. The fixed ring piece 3310 is arranged in a ring. The valve piece 3320 is arranged in the annular space of the fixed ring piece 3310. One end of the valve piece 3320 is a fixed end, and the fixed end is fixedly connected to the annular inner wall of the fixed ring piece 3310. The other end of the valve piece 3320 is a free end, and the free end is spaced from the inner wall of the fixed ring piece 3310. The fixed ring piece 3310 is installed on the clamping platform 3103; the joint 3200 is sleeved in the inlet interface 3107 and abuts against the side of the fixed ring piece 3310 away from the clamping platform 3103 to fix the fixed ring piece 3310 between the joint 3200 and the clamping platform 3103. The valve piece 3320 is arranged corresponding to the water outlet 5110 of the joint 3200, and the free end of the valve piece 3320 can swing inward axially with the fixed end of the valve piece 3320 under the action of the pressure difference on both sides.

[0126] Among them, as Figure 14 and Figure 15 shown, the stepped surface of the clamping table 3103 is arranged facing the outside of the water inlet interface 3107 (the side close to the flow channel 3101 is the inside, and the side far from the flow channel 3101 is the outside) to facilitate the abutment of the fixing ring piece 3310 against the clamping table 3103. The valve piece 3320 can be made of plastic, or rubber with relatively high strength, etc., and has a certain strength and also a certain flexibility, so that the valve piece 3320 can swing around the fixed end and will not be damaged.

[0127] In this embodiment, the joint 3200 of the water inlet mechanism is connected to the water inlet pipe. A sealing ring 3108 is arranged between the circumferential side wall of the joint 3200 and the inner side wall of the water inlet interface 3107 to avoid water leakage. A connecting lug 3210 is integrally formed at the outer end of the joint 3200, and a columnar fixing member 3220 such as a screw or a bolt passes through the connecting lug 3210 and is connected to the upper assembly shell 1510 to realize the fixation of the joint 3200.

[0128] In the water inlet mechanism of this embodiment, the fixing ring piece 3310 of the one-way water inlet valve structure 3300 is fixedly arranged. The valve piece 3320 can seal the water outlet 5110 of the joint 3200 in the natural state. When the pressure in the flow channel 3101 inside the valve piece 3320 decreases, the free end of the valve piece 3320 can swing inward under the action of the water flow in the joint 3200, thereby opening the one-way water inlet valve structure 3300, making the water outlet 5110 of the joint 3200 communicate with the flow channel 3101 of the upper assembly shell 1510, and realizing one-way water inlet. The structure of the one-way water inlet valve structure 3300 is simple and the assembly process is simple. Specifically, during assembly, first place the fixing ring piece 3310 of the one-way water inlet valve structure 3300 on the outer side surface of the clamping table 3103 facing outward, and then the joint 3200 is sleeved and assembled into the water inlet interface 3107. When the joint 3200 is fixed, the one-way water inlet valve structure 3300 can be clamped between the clamping table 3103 and the joint 3200. The fixation between the joint 3200 and the valve piece 3320 only needs to rely on the fixation of the joint 3200, which is convenient and fast to operate, and simplifies the fixation structure between the joint 3200 and the valve piece 3320, making the structure at the inlet of the joint 3200 more concise.

[0129] Specifically, the free end of the valve piece 3320 is arranged in an arc shape so that an arc-shaped extending gap 3330 is formed between the valve piece 3320 and the fixing ring piece 3310.

[0130] As Figure 16 shown, the valve piece 3320 is similar to a "tongue shape", and the gap 3330 between the edge of the valve piece 3320 and the fixing ring piece 3310 extends in a U shape. Preferably, the width of the gap 3330 between the valve piece 3320 and the fixing ring piece 3310 is substantially the same.

[0131] It can be understood that the free end of the valve plate 3320 is arc-shaped. The valve plate 3320 is only fixed at one end, and the circumferential side and the free end of the valve plate 3320 are both free, enabling the valve plate 3320 to swing better, thereby opening the water outlet 5110 of the joint 3200.

[0132] In this embodiment, the fixing ring plate 3310 and the valve plate 3320 are made of the same material and are integrally formed, specifically by injection molding.

[0133] In a specific implementation manner, as Figure 16 shown, the outer contour line of the fixing ring plate 3310 includes an arc-shaped side 3311 and a straight side 3312. The arc-shaped side 3311 and the straight side 3312 are connected end to end to form a closed loop, and the fixed end of the valve plate 3320 is correspondingly connected to the inner side of the straight side 3312. As Figure 4 shown, a protruding portion 2116 matching the straight side 3312 is provided on the side of the clamping table 3103 facing the one-way water inlet valve structure 3300, and the positioning member 3104 is used to position the installation position of the fixing ring plate 3310.

[0134] When installing the one-way water inlet valve structure 3300, by aligning the straight side 3312 with the positioning member 3104, the installation position of the one-way water inlet valve structure 3300 can be positioned. Limited by the function of the positioning member 3104 and combined with the inner side wall of the water inlet interface 3107, the one-way water inlet valve structure 3300 can be temporarily fixed without rotating or falling off, improving the stability of the one-way water inlet valve structure 3300 on the clamping table 3103 before installing the joint 3200, facilitating the subsequent assembly of the joint 3200, and improving the installation efficiency.

[0135] To prevent the free end of the valve plate 3320 from opening too large and affecting the state recovery of the valve plate 3320, in this embodiment, a limiting portion is further provided on the water inlet interface 3107 on the side of the clamping table 3103 away from the joint 3200. The limiting portion is spaced from the one-way water inlet valve structure 3300 and is used to limit the amplitude of the inward swing of the valve plate 3320.

[0136] As Figure 14 shown, a limiting portion is provided on the left side of the inner side wall of the water inlet interface 3107. The limiting portion is located inside the valve plate 3320 and is spaced from the valve plate 3320. Specifically, the limiting portion includes a limiting platform 3105 formed by the inner wall of the water inlet interface 3107 protruding inward. A plurality of limiting columns 3106 are provided on the limiting platform 3105. The limiting columns 3106 are spaced along the circumferential direction of the water inlet interface 3107, and the inner edge of the limiting platform 3105 is located inside the clamping table 3103. As Figure 15As shown, the number of the limit posts 3106 in this embodiment is four, and the four limit posts 3106 are evenly distributed along the circumferential direction of the limit platform 3105. The end face of the limit post 3106 is a plane that is roughly elliptical.

[0137] When the valve plate 3320 swings inward, the gap 3330 between the valve plate 3320 and the fixed ring plate 3310 increases, and the inside and outside of the one-way water inlet valve structure 3300 are communicated. The water flow in the joint 3200 enters the flow channel 3101. And at this time, the valve plate 3320 can abut against the end face of the limit post 3106, and the limit post 3106 limits the swing amplitude of the valve plate 3320, avoiding the valve plate 3320 from being difficult to return to the natural state due to excessive swing.

[0138] It should be noted that in the natural state, the valve plate 3320 and the fixed ring plate 3310 are substantially in the same plane. At this time, the one-way water inlet valve structure 3300 seals the water outlet 5110 of the interface.

[0139] In this embodiment, the end face of the joint 3200 facing the valve plate 3320 covers the gap 3330 between the free end and the fixed ring plate 3310, and this end face abuts against the edge of the free end.

[0140] It can be understood that, as Figure 14 shown, the end face of the joint 3200 covers the gap 3330 between the fixed ring plate 3310 and the valve plate 3320, ensuring that the valve plate 3320 seals the water outlet 5110 of the joint 3200 only in the natural state, and avoiding the water flow from entering the flow channel 3101 through the gap 3330. And the end face of the joint 3200 can abut against the free end of the valve plate 3320, forming an outer limit for the valve plate 3320 and avoiding the valve plate 3320 from swinging outward and causing water backflow.

[0141] As Figure 17 - Figure 19 shown, one end of the elastic valve body 4100 is provided with an inlet, the other end of the elastic valve body 4100 is provided with an elastic control part 4200, a crack 4201 is provided on the elastic control part 4200, a valve body cavity 4103 is provided in the elastic valve body 4100 between the inlet and the crack 4201, the side walls of the elastic valve body 4100 on both sides of the crack 4201 are the first side walls 4101, and the first side walls 4101 are recessed into an arc shape along the circumferential direction of the elastic valve body 4100 towards the inside of the valve body cavity 4103. The crack 4201 is in a closed state in the natural state, and the elastic control part 4200 can elastically deform under the action of the internal and external pressure difference of the valve body cavity 4103 to open the crack 4201.

[0142] Among them, as Figure 18 shown, the side walls of the elastic valve body 4100 on the left and right sides of the crack 4201 are also the first side walls 4101, as Figure 18The side walls of the elastic valve body 4100 corresponding to the upper and lower ends of the shown crack 4201 are also the second side walls 4102. As Figure 17 shown, the two first side walls 4101 are arranged opposite to each other. The first side walls 4101 are recessed inward and extend in an arc along the circumference of the elastic valve body 4100. The lowest point of the arc of the first side walls 4101 corresponds to the center of the crack 4201. The two first side walls 4101 are symmetrically arranged, so that the elastic control part 4200 forms a kidney-shaped shape with a recess in the middle.

[0143] Among them, the materials of the elastic valve body 4100 and the elastic control part 4200 are elastic materials, such as rubber, silica gel, etc. The elastic control part 4200 should cover one end of the elastic valve body 4100 away from the inlet, and the elastic control part 4200 is fixedly and sealedly connected to the elastic valve body 4100. The elastic valve body 4100 and the elastic control part 4200 of this embodiment are integrally formed by injection molding.

[0144] In the process of using the one-way valve of this embodiment, the pressure in the valve body cavity 4103 can be increased to make the pressure in the valve body cavity 4103 greater than the external pressure, forming an internal and external pressure difference. The pressure difference causes the elastic control part 4200 to undergo elastic deformation and makes the crack 4201 open. At this time, the one-way valve opens and water can be conveyed; when the pressure in the valve body cavity 4103 decreases, the internal and external pressure difference becomes smaller or disappears, and the elastic control part 4200 returns to its initial state under its own elasticity, and the crack 4201 is in a closed state; thus realizing the intermittent one-way water conveyance of the one-way valve.

[0145] As Figure 17 - Figure 19 、 Figure 23 shown, the elastic valve body 4100 is a support member of the elastic support part. Since the first side walls 4101 of the elastic valve body 4100 are recessed in an arc shape along the circumference of the elastic valve body 4100 towards the inside of the valve body cavity 4103, that is, the first side walls 4101 are recessed towards the side where the crack 4201 is located, the first side walls 4101 are closer to the crack 4201, and the length of the first side walls 4101 is extended, so that the support ability of the combination of the elastic valve body 4100 and the elastic support part is enhanced, which is beneficial to maintaining the closure of the crack 4201 of the one-way valve; and the first side walls 4101 are part of the elastic valve body 4100 and also have elasticity. The elastic control part 4200 can undergo elastic deformation together with the first side walls 4101, and the deformation amplitude increases, so that without affecting the opening of the one-way valve, the closing ability of the one-way valve is improved and the service life of the one-way valve is extended.

[0146] It can be understood that the valve body cavity 4103 is generally communicated with the buffer cavity, and the pressure of the valve body cavity 4103 can be changed by changing the pressure of the buffer cavity. In this embodiment, when the pressure difference of the valve body cavity 4103 generally needs to reach a certain value, the elastic control part 4200 can undergo elastic deformation. The specific value of the pressure difference can be obtained through tests based on the existing technology, combined with the pressure value that the valve body cavity 4103 can reach and the elastic force of the applied elastic control part 4200.

[0147] Further, in this embodiment of the check valve, along the direction from the inlet to the crack 4201, the first side wall 4101 is gradually inclined inwardly towards the valve body cavity 4103.

[0148] As Figure 1 and Figure 3 shown, along the direction from the inlet to the crack 4201, that is, the axial direction of the check valve, the two first side walls 4101 gradually approach each other, so that the elastic valve body 4100 tapers inward to form a generally conical shape.

[0149] It can be understood that the tapered elastic valve body 4100 is beneficial to the convergence of water flow, thereby increasing the impact force of the water flow on the elastic control part 4200 and facilitating the opening of the crack 4201.

[0150] It should be noted that the inclination of the first side wall 4101 along the axial direction of the elastic valve body 4100 can be different, for example, the inclination at the lower end is slightly smaller than that at the upper end.

[0151] In this embodiment of the check valve, along the direction from the inlet to the crack 4201, the length of the first side wall 4101 along the circumferential direction of the elastic valve body 4100 gradually increases.

[0152] As Figure 17 and Figure 19 shown, from the lower end to the upper end of the first side wall 4101, the length along the circumferential direction of the elastic valve body 4100 gradually increases. With the curvature of the first side wall 4101 remaining unchanged, the space between the two first side walls 4101 gradually decreases along the direction from the lower end to the upper end, which is beneficial to the convergence of water flow and improves the impact force of the water flow on the elastic control part 4200.

[0153] In this embodiment, the side walls of the elastic valve body 4100 at both ends of the crack 4201 are the second side walls 4102, and the first side wall 4101 and the second side wall 4102 are of an integral structure; along the circumferential direction of the elastic valve body 4100, the second side wall 4102 is an arc protruding outward from the valve body cavity 4103 of the elastic valve body 4100.

[0154] As Figure 17 and Figure 18As shown, one of the second side walls 4102 is located at one end of the two first side walls 4101 and is connected between the two first side walls 4101; the other second side wall 4102 is located at the other end of the two second side walls 4102 and is connected between the two first side walls 4101. The first side wall 4101 and the second side wall 4102 are of an integral structure and form the circumferential side wall of the elastic valve body 4100. As Figure 17 shown, the two second side walls 4102 are arc-shaped protruding away from each other, and specifically can be circular arcs.

[0155] To facilitate the installation of the elastic valve body 4100, a fixing ring 4300 protrudes outward from the outer side wall of the inlet end of the elastic valve body 4100 away from the valve body cavity 4103.

[0156] As Figure 17 and Figure 19 shown, the lower end of the elastic valve body 4100 of this embodiment also has a relatively short cylindrical section, and a fixing ring 4300 protrudes outward from the lower end of the cylindrical section. The fixing ring 4300 can be made of the same material as the elastic valve body 4100 and is integrally injection-molded with the elastic valve body 4100, which is convenient for processing.

[0157] Furthermore, both ends of the crack 4201 of this embodiment are spaced from the circumferential edge of the elastic control portion 4200, that is, as Figure 17 and Figure 18 shown, the crack 4201 is located inside the elastic control portion 4200.

[0158] It can be understood that the crack 4201 is located inside the elastic control portion 4200, and the elastic control portion 4200 at both ends of the crack 4201 can play a limiting role to prevent the crack 4201 from further tearing the elastic control portion 4200 when it opens, and it is also beneficial for the crack 4201 to maintain a closed state.

[0159] As Figure 20 - Figure 22 shown, the oral irrigator includes a housing 5100, and a storage hole 5120 is provided on the housing 5100. The storage hole 5120 is used to accommodate the nozzle 2100.

[0160] The storage hole 5120 is used to accommodate the nozzle 2100. When it is necessary to carry and transfer the oral irrigator, the nozzle 2100 can be detached from the housing 5100, and then the nozzle 2100 is inserted into the storage hole 5120, so as to avoid contaminating the nozzle 2100 when transferring the oral irrigator.

[0161] The number of the storage holes 5120 can be one, two or more. Multiple storage holes 5120 can accommodate multiple nozzles 2100. For example, when two people travel together, two nozzles 2100 can be carried in the housing 5100 at the same time, which improves the portability of carrying the nozzles 2100. At the same time, the two nozzles 2100 are respectively accommodated in two holes and isolated from each other, reducing the risk of cross-infection of oral problems.

[0162] The shape of the storage hole 5120 corresponds to the shape of the nozzle 2100, and the bottom end of the storage hole 5120 corresponds to the water spraying end of the nozzle 2100, so that the nozzle 2100 can be inserted into the storage hole 5120 in an inverted manner. By adopting the method of inserting the nozzle 2100 in an inverted manner for storage, the nozzle 2100 can be better protected at the nozzle.

[0163] The length of the storage hole 5120 is slightly less than the length of the nozzle 2100, so that a part of the nozzle 2100 is exposed outside the storage hole 5120, facilitating the user to pull out the nozzle 2100 from the storage hole 5120.

[0164] Furthermore, a sunk platform 5130 is provided on the housing 5100, and the storage hole 5120 is located on the bottom surface of the sunk platform 5130. The part of the nozzle 2100 exposed outside the storage hole 5120 can be located in the sunk platform 5130, avoiding interference caused by the protruding tail end of the nozzle 2100.

[0165] The oral irrigator further includes a cover body 5300 for covering the storage hole 5120. The cover body 5300 connected to the housing 5100 can be buckled above the storage hole 5120 after the nozzle 2100 is inserted into the storage hole 5120, thereby providing secondary protection for the nozzle 2100.

[0166] In an implementable manner, the cover body 5300 and the housing 5100 can be detachably connected, that is, the housing 5100 and the cover body 5300 are two independent components, and the cover body 5300 can be connected to the housing 5100 by means of snap connection, buckling or magnetic attraction.

[0167] In another implementable manner, the cover body 5300 is slidably or rotatably connected to the housing 5100. By moving the cover body 5300 relative to the housing 5100, the exposure and closing of the storage hole 5120 can be realized, avoiding the loss of the cover body 5300.

[0168] In this embodiment, the housing 5100 and the cover body 5300 are connected by a rotating shaft. One end of the rotating shaft is fixed to the housing 5100, and the cover body 5300 is rotatably connected to the rotating shaft, thereby realizing the rotation of the cover body 5300 relative to the housing 5100.

[0169] Embodiment 2

[0170] Differing from Embodiment 1, the push-pull module includes a permanent magnet unit 6210 and an electromagnet assembly. The permanent magnet unit 6210 is connected to the membranous elastic structure 1100. The two poles of the permanent magnet unit 6210 are respectively located at its opposite first end and second end, and the first end is closer to the inner sidewall of the membranous elastic structure 1100 than the second end. The electromagnet assembly is located outside the second end of the permanent magnet unit 6210. The direction of the magnetic field of the electromagnet assembly is adjustable. The electromagnet assembly is used to repel the permanent magnet unit 6210 or attract the permanent magnet unit 6210, so that the permanent magnet unit 6210 pushes the membranous elastic structure 1100 to move towards the inside of the buffer cavity or pulls the membranous elastic structure 1100 towards the outside of the buffer cavity.

[0171] The permanent magnet unit 6210 can be a columnar magnet. The permanent magnet unit 6210 is connected to the membranous elastic structure 1100. The two poles of the permanent magnet unit 6210 are respectively located at its opposite first end and second end, and the first end is closer to the inner sidewall of the membranous elastic structure 1100 than the second end. For example, the N pole and S pole of the permanent magnet unit 6210 are arranged in the up-down direction. The electromagnet assembly is located outside the second end of the permanent magnet unit 6210. By changing the direction of the current, the direction of the magnetic field of the electromagnet assembly is adjustable. The electromagnet assembly is used to repel the permanent magnet unit 6210 or attract the permanent magnet unit 6210, so that the permanent magnet unit 6210 pushes the membranous elastic structure 1100 to move towards the inside of the buffer cavity or pulls the membranous elastic structure 1100 towards the outside of the buffer cavity. In use, the magnetic attraction push-pull module reciprocally pushes and pulls the membranous elastic structure 1100. When controlling the electromagnet assembly to attract the permanent magnet unit 6210, the magnetic attraction push-pull module can pull the membranous elastic structure 1100 from the inside out, which can cause the membranous elastic structure 1100 to deform towards the outside of the buffer cavity, increasing the volume inside the buffer cavity. Water from the outside can enter the buffer cavity through the one-way water inlet valve structure 3300 from the water inlet 1610. When controlling the electromagnet assembly to repel the permanent magnet unit 6210, the magnetic attraction push-pull module pushes the membranous elastic structure 1100 from the outside in, which can cause the membranous elastic structure 1100 to deform towards the inside of the buffer cavity, reducing the volume inside the buffer cavity. Water from the outside can be ejected through the one-way water outlet valve 1700 structure from the water outlet 5110.

[0172] The electromagnet assembly includes an insulating bracket 6220, silicon steel sheets 6230, and a coil winding 6240. The silicon steel sheets 6230 are located outside the insulating bracket 6220, and the coil winding 6240 is wound around the outside of the insulating bracket 6220. The insulating bracket 6220 is cylindrical. A plurality of silicon steel sheets 6230 are installed inside the insulating bracket 6220, and the coil winding 6240 is wound around the outside of the insulating bracket 6220. By changing the direction of the current applied to the coil winding 6240, the magnetic field direction of the electromagnet assembly can be changed, so that the electromagnet assembly attracts or repels the permanent magnet unit 6210.

[0173] The permanent magnet unit 6210 is embedded inside the membranous elastic structure 1100. Embedding the permanent magnet unit 6210 inside the membranous elastic structure 1100 can increase the connection strength between the permanent magnet unit 6210 and the membranous elastic structure 1100. Specifically, the membranous elastic structure 1100 can be injection-molded, and the permanent magnet unit 6210 can be placed in advance into the mold for injection-molding the membranous elastic structure 1100. After the membranous elastic structure 1100 is cured, the permanent magnet unit 6210 is embedded inside the membranous elastic structure 1100.

[0174] Embodiment 3

[0175] The difference from Embodiment 1 is that, as Figure 24 and Figure 25 shown, the push-pull module includes a linear drive mechanism 7200. The drive end of the linear drive mechanism 7200 is connected to the outer wall of the membranous elastic structure 1100. The linear drive mechanism 7200 is used to push the membranous elastic structure 1100 to move towards the inside of the buffer cavity or pull the membranous elastic structure 1100 towards the outside of the buffer cavity.

[0176] The linear drive mechanism 7200 can make its movable end perform linear telescopic motion along a straight line. The linear drive mechanism 7200 is used to push the membranous elastic structure 1100 to move towards the inside of the buffer cavity or pull the membranous elastic structure 1100 towards the outside of the buffer cavity. In use, the linear drive mechanism 7200 reciprocally pushes and pulls the membranous elastic structure 1100. When the linear drive mechanism 7200 pulls the membranous elastic structure 1100 from the inside outwards, the membranous elastic structure 1100 can be deformed towards the outside of the buffer cavity, increasing the volume inside the buffer cavity. Water from the outside can enter the buffer cavity through the one-way water inlet valve structure 3300 from the water inlet 1610; when the linear drive mechanism 7200 pushes the membranous elastic structure 1100 from the outside inwards, the membranous elastic structure 1100 can be deformed towards the inside of the buffer cavity, reducing the volume inside the buffer cavity, and water from the outside can be ejected through the one-way water outlet valve 1700 structure from the water outlet 5110.

[0177] Specifically, the linear drive mechanism 7200 can be a linear motor 1210 or a voice coil motor 1210.

[0178] Embodiment 4

[0179] As Figure 26 - Figure 29 As shown, different from the membranous elastic structures 1100 in Embodiment 1, Embodiment 2, and Embodiment 3, in this embodiment, the membranous elastic structure 1100 is recessed outward to form a sac-shaped elastic water sac 8100. The push-pull module includes a drive module, a first extrusion part, and a second extrusion part. The elastic water sac 8100 is located between the first extrusion part and the second extrusion part, and both the first extrusion part and the second extrusion part are connected to the side wall of the elastic water sac 8100; at least one of the first extrusion part and the second extrusion part is connected to the drive module, and the drive module is used to drive at least one of the first extrusion part and the second extrusion part to move, so as to increase or decrease the distance between the first extrusion part and the second extrusion part.

[0180] Different from Embodiments 1-3, in this embodiment, the membranous elastic structure 1100 is no longer a flat sheet structure, but a sac-shaped elastic water sac 8100 recessed outward.

[0181] A first diversion port communicating with the inside and outside is provided on the side wall of the buffer cavity. The elastic water sac 8100 is hollow, and a second diversion port communicating with the inside and outside is provided on the elastic water sac 8100, and the first diversion port is docked with the second diversion port.

[0182] The material of the buffer cavity can be a hard material, such as plastic, while the material of the elastic water sac 8100 can be rubber with greater elasticity.

[0183] Both the first extrusion part and the second extrusion part can be connected to the side wall of the elastic water sac 8100. The drive module is used to automatically drive the relative movement of the first extrusion part and the second extrusion part, so as to realize the extrusion of the elastic water sac 8100 by the first extrusion part and the second extrusion part. The first extrusion part can be fixed, and the drive module can only move the second extrusion part toward or away from the first extrusion part, so as to extrude the elastic water sac 8100 located between the first extrusion part and the second extrusion part. When the gap 3330 between the first extrusion part and the second extrusion part becomes larger, the elastic water sac 8100 can restore its original shape.

[0184] The first extrusion part and the second extrusion part can both be connected to the driving module, and the driving module can drive the first extrusion part and the second extrusion part to move together in opposite or away directions at the same time. When the elastic water sac 8100 is extruded, the pressure in the buffer cavity is greater than the external pressure, and the water in the buffer cavity sprays out through the one-way water outlet valve 1700; when the elastic water sac 8100 is released and restored to its original shape, the pressure in the buffer cavity is less than the external pressure, and the external water can enter the buffer cavity from the water inlet 1610 through the one-way water inlet valve structure 3300. By repeatedly extruding and releasing the elastic water sac 8100, the pumping and spraying actions of the buffer cavity can be realized. The sealing structure between the elastic water sac 8100 and the buffer cavity is not easily damaged, and the overall sealing performance of the buffer cavity is better, which improves the service life of the oral irrigator.

[0185] As Figure 26 shown, the driving module includes an electromagnet member 8210, the first extrusion part includes a first clamping plate 8220, and the second extrusion part includes a second clamping plate 8230; the elastic water sac 8100 is located between the first clamping plate 8220 and the second clamping plate 8230, and the opposite side walls of the elastic water sac 8100 are respectively connected to the first clamping plate 8220 and the second clamping plate 8230; a first permanent magnet is arranged on the first clamping plate 8220, and the electromagnet member 8210 attracts or repels the first clamping plate 8220, so that the first clamping plate 8220 approaches the second clamping plate 8230 and flattens the elastic water sac 8100 or the first clamping plate 8220 moves away from the second clamping plate 8230 and releases the elastic water sac 8100. In an implementable embodiment, the second clamping plate 8230 can be fixed, while the first clamping plate 8220 moves relative to the second clamping plate 8230. A first permanent magnet is arranged on the first clamping plate 8220, and the electromagnet member 8210 changes the direction of the current to change the polarity of its end to attract or repel the first clamping plate 8220, so that the first clamping plate 8220 approaches the second clamping plate 8230 and flattens the elastic water sac 8100 or the first clamping plate 8220 moves away from the second clamping plate 8230 and releases the elastic water sac 8100.

[0186] When the oral irrigator is in use, by changing the magnetism at the end of the electromagnet member 8210, the first permanent magnet on the first clamping plate 8220 can be attracted or repelled, thereby changing the distance between the first clamping plate 8220 and the second clamping plate 8230. Therefore, the elastic water sac 8100 is located between the first clamping plate 8220 and the second clamping plate 8230. When the distance between the first clamping plate 8220 and the second clamping plate 8230 decreases, the elastic water sac 8100 will be flattened and deformed by the first clamping plate 8220 and the second clamping plate 8230. When the distance between the first clamping plate 8220 and the second clamping plate 8230 increases, the elastic water sac 8100 can be pulled by the first clamping plate 8220 and the second clamping plate 8230 to return to its original shape. By squeezing and releasing the elastic water sac 8100, the volume of the hollow part inside the elastic water sac 8100 can be changed, and further the pressure inside the hollow part of the elastic water sac 8100 can be changed. Since the elastic water sac 8100 is communicated with the buffer cavity, the pressure in the buffer cavity changes as the pressure inside the elastic water sac 8100 changes. When the elastic water sac 8100 is squeezed, the pressure in the buffer cavity is greater than the external pressure, and the water in the buffer cavity is sprayed out through the one-way water outlet valve 1700; when the elastic water sac 8100 is released and returns to its original shape, the pressure in the buffer cavity is less than the external pressure, and the external water can enter the buffer cavity from the water inlet 1610 through the one-way water inlet valve structure 3300. By repeatedly squeezing and releasing the elastic water sac 8100, the pumping and spraying actions of the buffer cavity can be realized. The sealing structure between the elastic water sac 8100 and the buffer cavity is not easily damaged, and the overall sealing performance of the buffer cavity is better, improving the service life of the oral irrigator.

[0187] In this embodiment, a second permanent magnet may also be provided on the second clamping plate 8230. The first clamping plate 8220 and the second clamping plate 8230 are respectively located on both sides of the opposite polar ends of the electromagnet member 8210. The electromagnet member 8210 is used to apply magnetic forces to the first permanent magnet and the second permanent magnet simultaneously, so that the first clamping plate 8220 and the second clamping plate 8230 move towards or away from each other.

[0188] Specifically, the two polar ends of the electromagnet member 8210 are respectively located on the left and right sides of the electromagnet member 8210. The first clamping plate 8220 is located on the left side of the electromagnet member 8210, and the second clamping plate 8230 is located on the right side of the electromagnet member 8210. The surface of the first permanent magnet facing the electromagnet member 8210 may be the N pole, and the surface of the second permanent magnet facing the electromagnet member 8210 may be the S pole, so that the electromagnet member 8210 can be used to attract or simultaneously repel the first permanent magnet and the second permanent magnet.

[0189] Such as Figure 26 and Figure 28As shown, the electromagnet member 8210 includes a first polar end and a second polar end located at its opposite ends; a first clamping plate 8220 is provided with a first hinged structure for hinging with the electromagnet member 8210, and a first magnetic attraction portion 8221 and a first clamping portion 8222 located on opposite sides of the first hinged structure; a first permanent magnet is disposed on the first magnetic attraction portion 8221, and the first magnetic attraction portion 8221 is located outside the first polar end; a second clamping plate 8230 is provided with a second hinged structure for hinging with the electromagnet member 8210, and a second magnetic attraction portion 8231 and a second clamping portion 8232 located on opposite sides of the second hinged structure; a second permanent magnet is disposed on the first magnetic attraction portion 8221, and the second magnetic attraction portion 8231 is located outside the second polar end; the first clamping portion 8222 and the second clamping portion 8232 are used to connect with opposite side walls of the elastic water bag 8100 respectively.

[0190] By changing the direction of the current passing through the electromagnet member 8210, the polarities of the first polar end and the second polar end can be alternately changed, so that the first polar end and the second polar end simultaneously attract the first magnetic attraction portion 8221 and the second magnetic attraction portion 8231. Due to the lever principle, when the first magnetic attraction portion 8221 and the second magnetic attraction portion 8231 approach the electromagnet member 8210 simultaneously, the first clamping portion 8222 and the second clamping portion 8232 located at the other end of the hinged structure will move in opposite directions, thereby driving the elastic water bag 8100 to actively restore its original shape; conversely, when the first magnetic attraction portion 8221 and the second magnetic attraction portion 8231 are simultaneously repelled and move away from the electromagnet member 8210, the first clamping portion 8222 and the second clamping portion 8232 located at the other end of the hinged structure will move towards each other, thereby flattening the elastic water bag 8100. The hinged lever structure can make full use of the internal space of the oral irrigator and realize the change of the distance between the first clamping plate 8220 and the second clamping plate 8230 with a smaller internal space.

[0191] A return spring 8300 is connected between the first clamping plate 8220 and the second clamping plate 8230, and the return spring 8300 has a tendency to move the first clamping plate 8220 and the second clamping plate 8230 away from each other. It can accelerate the reset speed of the elastic water bag 8100 and at the same time avoid the elastic water bag 8100 from being overly squeezed.

[0192] The electromagnet member 8210 includes an insulating bracket 6220, a silicon steel sheet 6230 assembly is disposed inside the insulating bracket 6220, a coil winding 6240 is wound around the outside of the insulating bracket 6220, and both the first hinged structure and the second hinged structure are hinged on the insulating bracket 6220.

[0193] The oral irrigator includes an upper assembly housing 1510, and a vertical assembly hole penetrating the upper and lower end faces of the upper assembly housing 1510 is provided on the upper assembly housing 1510; a connecting cylinder 8410 communicating with the vertical assembly hole and extending downward is provided at the lower end of the upper assembly housing 1510, and the bottom opening of the connecting cylinder 8410 is inserted into the opening of the elastic water sac 8100; the oral irrigator includes a tightening member 8420 for tightening the elastic water sac 8100 on the connecting cylinder 8410.

[0194] The connecting cylinder 8410 is inserted into the interior of the elastic water sac 8100, and the inner wall of the opening of the elastic water sac 8100 tightly holds the connecting cylinder 8410, which can increase the sealing performance between the two. Further, the oral irrigator includes a tightening member 8420 for tightening the elastic water sac 8100 on the connecting cylinder 8410. The tightening member 8420 is in a ring shape, and the tightening member 8420 is sleeved on the outer side of the elastic water sac 8100 to press the elastic water sac 8100 against the side wall of the connecting cylinder 8410 in the circumferential direction.

[0195] A limiting protrusion 8110 protruding outward is further provided on the circumferential outer side wall of the second diversion port of the elastic water sac 8100, and a limiting step structure 8421 protruding inward is provided on the inner wall of the tightening member 8420. The limiting protrusion 8110 is clamped above the limiting step structure 8421. The cooperation between the limiting step structure 8421 and the limiting protrusion 8110 can prevent the elastic water sac 8100 from separating from the upper assembly housing 1510.

[0196] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oral irrigator, characterized in that, Including: A buffer cavity, a push-pull module and a nozzle (2100). A water inlet (1610) and a water outlet (5110) communicating with the inside and outside are provided on the side wall of the buffer cavity. A one-way water inlet valve structure is provided at the water inlet (1610), and a one-way water outlet valve (1700) structure is provided at the water outlet (5110). The nozzle (2100) is connected to the water outlet (5110). At least a part of the side wall of the buffer cavity is a membranous elastic structure (1100). The push-pull module is connected to the outer wall of the membranous elastic structure (1100), and the push-pull module is used to push the membranous elastic structure (1100) toward the inside of the buffer cavity or pull the membranous elastic structure (1100) toward the outside of the buffer cavity. The oral irrigator further includes an elastomeric valve member (7400), and the elastomeric valve member (7400) is inserted into the buffer cavity. The elastomeric valve member (7400) includes a cavity penetrating through its upper and lower end faces. A conical elastic valve (7410) is provided in the cavity. The conical elastic valve (7410) includes a conical surface facing the inside of the buffer cavity. From the inside to the outside, the shape of the cross-section of the conical surface gradually decreases, and a water outlet gap communicating the inner and outer surfaces of the conical elastic valve (7410) is provided at the top of the conical surface. The water inlet (1610) is provided on the circumferential inner side wall of the buffer cavity. The elastomeric valve member (7400) includes a retaining edge (7420) at its bottom end. The retaining edge (7420) covers the inside of the water inlet (1610). The retaining edge (7420) is elastic and can be deformed inward under the action of pressure. The retaining edge (7420) forms the one-way water inlet valve structure. An annular base (7510) extending inward is provided on the inner wall of the buffer cavity. The hollow position of the annular base (7510) is above the membranous elastic structure (1100), and the annular base (7510) is below the retaining edge (7420). A flow guide cylinder (7520) concentric with it is provided on the annular base (7510). The retaining edge (7420) is located between the circumferential outer wall of the flow guide cylinder (7520) and the water inlet (1610).

2. The dental irrigator according to claim 1, wherein The push-pull module includes a connecting rod (1300) and an eccentric wheel mechanism. The connecting rod (1300) includes a first end and a second end. The first end of the connecting rod (1300) is connected to the membranous elastic structure (1100). The second end of the connecting rod (1300) is connected to the eccentric wheel mechanism, and the eccentric wheel mechanism is used to drive the connecting rod (1300) to perform reciprocating push-pull motion.

3. The oral irrigator according to claim 2, wherein The eccentric wheel mechanism includes a motor (1210), a first gear (1220), a second gear (1230), and a fixed shaft (1240). The first gear (1220) is connected to the output shaft of the motor (1210). The second gear (1230) is an end face gear, which meshes with the first gear (1220), and the axial direction of the first gear (1220) is perpendicular to the axial direction of the second gear (1230). An eccentric shaft body (1231) protruding outward is provided on one surface of the second gear (1230). The axis of the eccentric shaft body (1231) is parallel to and spaced from the axis of the second gear (1230). Both ends of the fixed shaft (1240) are fixed, and the fixed shaft (1240) axially penetrates the second gear (1230) and the eccentric shaft body (1231) along the axial direction of the second gear (1230). A sleeve (1310) is provided at the second end of the connecting rod (1300), and the sleeve (1310) is sleeved on the outside of the eccentric shaft body (1231).

4. The oral irrigator according to claim 1, wherein The push-pull module includes a permanent magnet unit (6210) and an electromagnet assembly. The permanent magnet unit (6210) is connected to the membrane-like elastic structure. The two poles of the permanent magnet unit (6210) are respectively located at its opposite first end and second end, and the first end is closer to the inner side wall of the membrane-like elastic structure than the second end. The electromagnet assembly is located outside the second end of the permanent magnet unit (6210). The direction of the magnetic field of the electromagnet assembly is adjustable. The electromagnet assembly is used to repel the permanent magnet unit (6210) or attract the permanent magnet unit (6210), so that the permanent magnet unit (6210) pushes the membrane-like elastic structure to move towards the inside of the buffer cavity or pulls the membrane-like elastic structure towards the outside of the buffer cavity.

5. The oral irrigator according to claim 1, wherein, The push-pull module includes a linear drive mechanism (7200). The drive end of the linear drive mechanism (7200) is connected to the outer wall of the membrane-like elastic structure (1100). The linear drive mechanism (7200) is used to push the membrane-like elastic structure (1100) to move towards the inside of the buffer cavity or pull the membrane-like elastic structure (1100) towards the outside of the buffer cavity.

6. The dental irrigator according to claim 1, wherein, The membrane-like elastic structure is recessed outward to form a sac-shaped elastic water bag (8100). The push-pull module includes a drive module, a first extrusion part, and a second extrusion part. The elastic water bag (8100) is located between the first extrusion part and the second extrusion part, and both the first extrusion part and the second extrusion part are connected to the side wall of the elastic water bag (8100). At least one of the first extrusion part and the second extrusion part is connected to the drive module. The drive module is used to drive at least one of the first extrusion part and the second extrusion part to move, so that the distance between the first extrusion part and the second extrusion part increases or decreases.

7. The oral irrigator according to claim 6, wherein The driving module includes an electromagnet member (8210), the first pressing portion includes a first clamping plate (8220), and the second pressing portion includes a second clamping plate (8230); The elastic water sac (8100) is located between the first clamping plate (8220) and the second clamping plate (8230), and the opposite side walls of the elastic water sac (8100) are respectively connected to the first clamping plate (8220) and the second clamping plate (8230); a first permanent magnet is provided on the first clamping plate (8220), and the electromagnet member (8210) attracts or repels the first clamping plate (8220) to make the first clamping plate (8220) approach the second clamping plate (8230) and flatten the elastic water sac (8100) or make the first clamping plate (8220) move away from the second clamping plate (8230) and release the elastic water sac (8100).

8. The oral irrigator according to claim 7, wherein, A second permanent magnet is provided on the second clamping plate (8230), and the first clamping plate (8220) and the second clamping plate (8230) are respectively located on both sides of the opposite two polar ends of the electromagnet member (8210), and the electromagnet member (8210) is used to apply magnetic forces to the first permanent magnet and the second permanent magnet simultaneously to make the first clamping plate (8220) and the second clamping plate (8230) move towards or away from each other.

9. The oral irrigator according to claim 8, wherein The electromagnet member (8210) includes a first polar end and a second polar end located at its opposite ends; The first clamping plate (8220) is provided with a first hinged structure for hinging with the electromagnet member (8210), and a first magnetic attraction portion (8221) and a first clamping portion (8222) located on opposite sides of the first hinged structure; the first permanent magnet is provided on the first magnetic attraction portion (8221), and the first magnetic attraction portion (8221) is located outside the first polar end; The second clamping plate (8230) is provided with a second hinged structure for hinging with the electromagnet member (8210), and a second magnetic attraction portion (8231) and a second clamping portion (8232) located on opposite sides of the second hinged structure; the second permanent magnet is provided on the first magnetic attraction portion (8221), and the second magnetic attraction portion (8231) is located outside the second polar end; The first clamping portion (8222) and the second clamping portion (8232) are used to be respectively connected to the opposite side walls of the elastic water sac (8100).

10. The oral irrigator according to claim 7, wherein, A return spring (8300) is connected between the first clamping plate (8220) and the second clamping plate (8230), and the return spring (8300) has a tendency to make the first clamping plate (8220) and the second clamping plate (8230) move in a direction away from each other.

11. The oral irrigator according to claim 6, wherein, The oral irrigator includes an upper assembly shell (1510), and a vertical assembly hole penetrating the upper and lower end faces of the upper assembly shell (1510) is provided on the upper assembly shell (1510); A connecting cylinder (8410) communicating with the vertical assembly hole and extending downward is provided at the lower end of the upper assembly shell (1510), and the bottom opening of the connecting cylinder (8410) is inserted into the opening of the elastic water bag (8100). The oral irrigator includes a tightening member (8420) for tightening the elastic water bag (8100) on the connecting cylinder (8410).

12. The dental irrigator according to any one of claims 1 to 5, characterized in that, A connecting member (1400) is connected to the membrane-like elastic structure (1100). A part of the connecting member (1400) is located inside the membrane-like elastic structure (1100), and another part is located outside the membrane-like elastic structure (1100). The part of the connecting member (1400) located outside the membrane-like elastic structure (1100) is used to connect with the push-pull module.

13. The oral irrigator according to claim 12, wherein, A limiting skirt protruding radially outward is provided on the circumferential side wall of the part of the connecting member (1400) located inside the membrane-like elastic structure (1100), so that a stepped structure is formed on the connecting member (1400). A stepped hole corresponding to the stepped structure is provided inside the membrane-like elastic structure (1100), and the stepped structure is located in the stepped hole.

14. The oral irrigator according to claim 13, wherein The push-pull module is detachably connected to the connecting member (1400).

15. The oral irrigator according to claim 1, wherein, The nozzle (2100) includes a nozzle body (2110). A channel (2120) for fluid to pass through is provided in the nozzle body (2110). A limiting stop portion (2113) is provided on the inner wall surface of the nozzle body (2110), and the limiting stop portion (2113) forms a limiting surface (2114) facing the fixed end of the nozzle body (2110) in the channel (2120).

16. The oral irrigator according to claim 15, wherein, The channel (2120) includes a first channel (2121) and a second channel (2122) which are communicated with each other and arranged in sequence along the length direction of the nozzle body (2110). The inner diameter of the first channel (2121) is larger than that of the second channel (2122). A step is formed at the connection between the first channel (2121) and the second channel (2122), and the step serves as the limiting stop portion (2113).

17. The oral irrigator according to claim 1, wherein, The oral irrigator includes a housing (5100), and a storage hole (5120) is provided on the housing (5100) for accommodating the nozzle (2100).

18. The oral irrigator according to claim 17, wherein, The oral irrigator further includes a cover body (5300) for covering the storage hole (5120).

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