Rotatable toothbrush head and electric toothbrush

Abstract

The utility model relates to the field of electric toothbrushes, and provides a rotatable toothbrush head and an electric toothbrush. The rotatable toothbrush head comprises a shell, a transmission piece and a bristle base. The transmission part is rotatably mounted on the shell, and one end of the transmission part axially penetrates through the shell and then is fixedly connected with the bristle seat, so that the bristle seat is rotatably mounted on the shell through the transmission part; and the connecting groove before and after the transmission part rotates is suitable for being fixedly connected with a driving shaft of a toothbrush handle. The electric toothbrush comprises a toothbrush head and a toothbrush handle, and a bristle base of the toothbrush head is rotatably installed on the shell, so that bristles of the bristle base are located on the same side or the opposite side of the key. The rotatable transmission part is arranged in the shell, the two ends of the transmission part are suitable for being connected with the bristle base and the driving shaft of the toothbrush handle respectively, the bristle base and the transmission part only need to axially rotate around the shell, connection of the shell and the toothbrush handle is not affected, the orientation of bristles can be adjusted without rotating the whole toothbrush head, and tooth brushing for children is facilitated; and the application range is wider.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric toothbrush field further relates to a rotatable toothbrush head and electric toothbrush. BACKGROUND

[0002] In daily life, in order to clean oral cavity quickly, electric toothbrush is often used, which includes detachable toothbrush handle and toothbrush head, and the motor in the toothbrush handle drives the driving shaft to vibrate or rotate quickly, and the driving shaft drives the toothbrush head to vibrate quickly. Generally, the installation of the existing toothbrush head and toothbrush handle is one-way, that is, the shaft sleeve of the toothbrush head can only be installed on the connecting seat of the toothbrush handle in one direction, the side wall of the toothbrush handle is provided with a button, and the button is in the same direction with the bristles of the bristle holder. At this time, it is convenient for the user to brush teeth and also can adjust the vibration frequency of the toothbrush head in time through the button, which is convenient for the user to use. However, when the child needs to be brushed, the bristles need to be aligned with the child's teeth, and at this time, the button will be located on the side away from the user, and the user cannot operate the toothbrush through the button, and needs to take down the toothbrush frequently to adjust, so that the user is extremely inconvenient when brushing the teeth for the child. SUMMARY

[0003] In view of the above technical problems, the utility model aims at providing a rotatable toothbrush head and electric toothbrush, the inside of the shell is provided with a rotatable transmission part, and the two ends of the transmission part are suitable for connecting the bristle holder and the driving shaft of the toothbrush handle respectively. Only the bristle holder and the transmission part need to be rotated around the shell axis, which does not affect the connection between the shell and the toothbrush handle. The orientation of the bristles can be adjusted without rotating the entire toothbrush head, which is convenient for brushing teeth for children and has a wider range of use.

[0004] In order to achieve the above purpose, the utility model provides a rotatable toothbrush head, which comprises a shell, a transmission part and a bristle holder.

[0005] The transmission part is rotatably installed in the shell, and one end of the transmission part is fixedly connected with the bristle holder after penetrating the shell axially, so that the bristle holder is rotatably installed in the shell through the transmission part.

[0006] The other end of the transmission part is provided with a connecting groove, and the connecting grooves before and after the rotation of the transmission part are suitable for fixedly connecting the driving shaft of the toothbrush handle.

[0007] In some embodiments, the shell has a containing cavity, an axial one end of the containing cavity is provided with a first hole, and one end of the transmission part is suitable for penetrating the first hole.

[0008] A first rotating part is further arranged on the outer side wall of the transmission part, and the first rotating part is arranged between the inner side wall of the shell and the outer side wall of the transmission part, so that the transmission part is rotatably arranged in the shell.

[0009] In some embodiments, the first rotating member comprises a first rotating part, which is elastically arranged between the inner side wall of the first hole and the outer side wall of the transmission member, so that the transmission member is arranged between the part of the shell and the inner side wall of the shell.

[0010] In some embodiments, a plurality of elastic protrusions are further arranged on the outer side wall of the first rotating part, which are arranged along the shell in an axial direction and are elastically connected with the inner side wall of the first hole.

[0011] In some embodiments, the transmission member is further provided with a rotating groove at a corresponding position of the first hole, and the first rotating part is arranged in the rotating groove.

[0012] The first rotating member further comprises a second rotating part, which is arranged at an end of the first rotating part away from the bristle holder, and the second rotating part is elastically connected with the end of the first hole away from the bristle holder and the side wall of the rotating groove away from the bristle holder.

[0013] In some embodiments, the bristle holder is arranged along the shell in an axial direction, and a soft shell is further arranged on the outer side of the bristle holder, and the shell is further provided with a placing groove on the outer side wall of an end of the shell close to the bristle holder, and the soft shell is at least partially arranged in the placing groove.

[0014] In some embodiments, the accommodating cavity is further provided with a second hole at the other end in an axial direction, and the second hole is matched with the connecting groove.

[0015] The connecting groove is further provided with a first fixed wall and a second fixed wall, which are arranged along the shell in an axial direction in sequence and are adapted to abut and fix the driving shaft of the toothbrush handle.

[0016] In some embodiments, the connecting groove is further provided with a guide wall, which is arranged at an end of the connecting groove away from the bristle holder, and the driving shaft of the toothbrush handle is adapted to drive the transmission member to rotate along the guide wall, so that the connecting groove is matched with the driving shaft.

[0017] In some embodiments, the second hole is further provided with a shaft sleeve, which is adapted to fixedly connect the connecting seat of the toothbrush handle, and the other end of the transmission member is further provided with a second rotating member, which is located between the end of the transmission member away from the bristle holder and the end of the shaft sleeve close to the bristle holder.

[0018] According to another aspect of the present application, further provided is an electric toothbrush comprising the rotatable toothbrush head of any one of the above preferred embodiments and a toothbrush handle, the connecting seat of the toothbrush handle is adapted to fixedly connect the shaft sleeve of the toothbrush head, the driving shaft of the toothbrush handle is adapted to connect the transmission member of the toothbrush head for rotating the toothbrush head, the toothbrush handle further comprises a button arranged on the side wall of the toothbrush handle, and the bristle holder of the toothbrush head is rotatably arranged in the shell, so that the bristles of the bristle holder are located on the same side or the opposite side of the button.

[0019] Compared with the prior art, the rotatable toothbrush head and the electric toothbrush provided by the present application have at least one of the following beneficial effects:

[0020] 1. The transmission member is rotatably arranged in the shell, and the two ends of the transmission member are adapted to connect the bristle holder and the driving shaft of the toothbrush handle, respectively, so that the bristle holder and the transmission member are only required to be axially rotated around the shell, the connection between the shell and the toothbrush handle is not affected, the orientation of the bristles can be adjusted without rotating the entire toothbrush head, the toothbrush is convenient for children to use, and the use range is wider.

[0021] 2. The first rotating member is arranged between the outer side wall of the transmission member and the inner side wall of the shell, the first rotating member can effectively reduce the friction between the transmission member and the first hole channel of the shell when the transmission member rotates, so that the friction between the transmission member and the first hole channel is not too large, and the rotation efficiency of the bristle holder is affected; meanwhile, the first rotating member also has a waterproof function, so that liquid outside is prevented from entering the shell through the first hole channel, and the waterproof level of the toothbrush head is improved.

[0022] 3. The first rotating part is provided with a plurality of elastic protrusions on the outer side wall in contact with the first hole channel, the elastic protrusions can further reduce the contact area between the first rotating part and the first hole channel, and further reduce the friction between the first hole channel and the first rotating member; meanwhile, the elastic protrusions are elastically connected to the inner side wall of the first hole channel, and the waterproof capacity of the first rotating member is also increased.

[0023] 4. The first rotating member is fixedly arranged in the rotating groove of the transmission member, so that the first rotating member is prevented from being dislocated and moved when the transmission member rotates, and the reliability of the first rotating member is improved; the second rotating part is arranged at the end of the first hole channel away from the bristle holder and the side wall of the rotating groove away from the bristle holder, so that the transmission member and the shell are effectively prevented from colliding, and the transmission member is prevented from being damaged and from transmitting vibration.

[0024] 5. The first fixed wall and the second fixed wall are sequentially and spacedly arranged in the connecting slot, the driving shaft of the toothbrush handle is suitable for being inserted into the connecting slot before and after rotation, so that the driving shaft can be matched with the connecting slot of the transmission member before and after rotation, and the transmission member can be connected with the driving shaft normally; the connecting slot is further provided with a guide wall at an end away from the bristle holder, the guide wall is symmetrically arranged on both sides of the shell in the axial direction, when the bristle holder is not rotated to the position, the driving shaft can be slid into the connecting slot along the guide wall, at this time, the transmission member is also rotated by the rotating force of the driving shaft, so that the connecting slot is matched with the driving shaft, the guide wall can effectively avoid the situation that the driving shaft cannot be inserted into the connecting slot, and then the problem that the toothbrush head and the toothbrush handle cannot be installed is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above-mentioned characteristics, technical features, advantages and implementation manners of the present application will be further described in the following preferred embodiments in a clear and understandable manner combined with the drawings.

[0026] Figure 1 is the overall view of the electric toothbrush;

[0027] Figure 2 is the cross-sectional view of the rotatable toothbrush head;

[0028] Figure 3 is the position view of the first rotating member;

[0029] Figure 4 is the position view of the first rotating member;

[0030] Figure 5 is the cross-sectional view of the connecting slot;

[0031] Figure 6 is the structural view of the connecting slot.

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] Toothbrush head 1, shell 11, accommodating cavity 110, first hole 111, second hole 112, placing slot 113, transmission member 12, connecting slot 121, first fixed wall 1211, second fixed wall 1212, guide wall 1213, rotating slot 122, bristle holder 13, seat body soft shell 131, first rotating member 14, first rotating part 141, elastic protrusion 1411, second rotating part 142, shaft sleeve 15, second rotating member 16,

[0034] Toothbrush handle 2, driving shaft 21, connecting seat 22, button 23. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, specific implementation manners of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0036] In order to make the drawing simple, only the parts related to the present application are shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0037] It should be further understood that the term "and / or" used in the specification and claims of the present application means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0038] In this paper, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In addition, in the description of the present application, the terms "first", "second" and the like are only used for differentiation and description, and cannot be understood as indicating or implying relative importance. It should be pointed out that the above embodiments can be freely combined according to the needs. The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, some improvements and refinements can also be made, which should be regarded as the protection scope of the present application.

[0040] Reference Figure 1 And Figure 2 The present application provides a rotatable toothbrush head 1, which comprises a shell 11, a transmission member 12 and a bristle holder 13; the transmission member 12 is rotatably installed on the shell 11, one end of the transmission member 12 axially penetrates through the shell 11 and is fixedly connected with the bristle holder 13, so that the bristle holder 13 is rotatably installed on the shell 11 through the transmission member 12; the other end of the transmission member 12 is provided with a connecting groove 121, and the connecting grooves 121 before and after the rotation of the transmission member 12 are suitable for fixedly connecting the driving shaft 21 of the toothbrush handle 2.

[0041] In the embodiment, the shell 11 is internally provided with a rotatable transmission member 12, the two ends of the transmission member 12 are respectively adapted to be connected to the bristle holder 13 and the drive shaft 21 of the toothbrush handle 2, only the bristle holder 13 and the transmission member 12 need to be axially rotated around the shell 11, which does not affect the connection between the shell 11 and the toothbrush handle 2, the orientation of the bristles can be adjusted without rotating the entire toothbrush head 1, which is convenient for children to brush their teeth and has a wider range of use.

[0042] Specifically, the transmission member 12 is arranged inside the shell 11, and the two ends of the transmission member 12 are adapted to be fixedly connected to the bristle holder 13 and the drive shaft 21 of the toothbrush handle 2, so that the drive shaft 21 can directly drive the bristle holder 13 to vibrate. The bristle holder 13 and the shell 11 are separately arranged, and the bristle holder 13 is only connected to the transmission member 12 inside the shell 11, so that the bristle holder 13 can be rotatably arranged on one side of the shell 11 through the transmission member 12. At this time, the toothbrush head 1 does not need to be rotated and then installed on the toothbrush handle 2, nor does the connection between the toothbrush head 1 and the toothbrush handle 2 need to be adaptively changed, which greatly reduces the cost. Moreover, the vibration on the bristle holder 13 will not be transmitted to the shell 11, avoiding the problem of the shell 11 being numb. It is worth noting that the transmission member 12 is rotatably mounted in the shell 11, which can be that a gap is left between the outer side wall of the transmission member 12 and the inner side wall of the shell 11, or a first rotating member 14 is arranged between the outer side wall of the transmission member 12 and the inner side wall of the shell 11, so that the rotation of the transmission member 12 will not hit the inner side wall of the shell 11, or even the outer side wall of the transmission member 12 and the inner side wall of the shell 11 can be arranged in close contact, as long as the transmission member 12 connected to the bristle holder 13 is rotatably mounted in the shell 11.

[0043] It is worth noting that the transmission member 12 includes a transmission rod and a hard rubber coating, the hard rubber coating is arranged on the outer side of one end of the transmission rod and is located in the accommodating cavity 110, one end of the hard rubber coating away from the bristle holder 13 is provided with a connecting groove 121, and the other end of the transmission rod is fixedly connected to the bristle holder 13. In the embodiment, the hard rubber coating is arranged on the outer side of the end of the transmission rod away from the bristle holder 13, one end of the hard rubber coating away from the bristle holder 13 is provided with a connecting groove 121, and the connecting groove 121 is adapted to fixedly connect the drive shaft 21 of the toothbrush handle 2, which facilitates the direct transmission connection between the transmission member 12 and the drive shaft 21 and improves the durability of the transmission member 12. Specifically, the hard rubber coating is arranged on the outer side of the part of the transmission rod located in the accommodating cavity 110, and the hard rubber coating is formed on the outer side of the transmission rod. The hard rubber coating is any one of POM, PC, and PEEK. Preferably, the hard rubber coating is POM. POM is also called race steel material, which is easy to process and has the characteristics of good rigidity, good toughness, and good wear resistance. It also has a low friction coefficient and good geometric stability. The transmission rod is preferably made of metal.

[0044] It is worth noting that in the transformed embodiment, the transmission member 12 can also be a whole, the transmission member 12 is coaxially arranged with the shell 11 and a gap is left between the inner side wall of the transmission member 12, and the transmission member 12 is directly drivingly connected with the bristle holder 13 and the driving shaft 21 of the toothbrush handle 2. At this time, the transmission member 12 is preferably metal, and it can also be a hard material such as POM. The difference between this embodiment and the previous embodiment is that the material of the transmission member 12 in this embodiment is one, that is, the transmission member 12 is a whole.

[0045] Further, referring to Figure 3 , the shell 11 has a containing cavity 110, the containing cavity 110 is provided with a first hole 111 at one axial end, and one end of the transmission member 12 is adapted to pass through the first hole 111; the outer side wall of the transmission member 12 is further provided with a first rotating member 14, the first rotating member 14 is arranged between the inner side wall of the shell 11 and the outer side wall of the transmission member 12, so that the transmission member 12 can be rotatably arranged in the shell 11.

[0046] In this embodiment, the first rotating member 14 is arranged between the outer side wall of the transmission member 12 and the inner side wall of the shell 11, which can effectively reduce the friction between the transmission member 12 and the first hole 111 when the transmission member 12 rotates, so as to avoid that the friction between the transmission member 12 and the first hole 111 is too large to affect the rotation efficiency of the bristle holder 13; at the same time, the first rotating member 14 also plays a waterproof role, avoiding that the outside liquid reaches the inside of the shell 11 through the first hole 111, and improving the waterproof level of the toothbrush head 1.

[0047] Specifically, the corresponding position of the transmission member 12 and the first hole 111 abuts against the first hole 111, so that the transmission member 12 is coaxially arranged in the containing cavity 110 of the shell 11. The first rotating member 14 includes a first rotating part 141, the first rotating part 141 is elastically arranged between the inner side wall of the first hole 111 and the outer side wall of the transmission member 12, so that the part of the transmission member 12 located between the inner side wall of the shell 11 and the inner side wall of the shell 11 is arranged at a distance from each other. In this embodiment, the first rotating part 141 elastically connects the inner side wall of the first hole 111 and the outer side wall of the transmission member 12, which can not only reduce the friction between the inner side wall of the first hole 111 and the transmission member 12, so that the rotation of the transmission member 12 is more smooth and simple, but also can separate the shell 11 and the transmission member 12, so as to avoid that the vibration of the transmission member 12 is transmitted to the shell 11, and reduce the transmission attenuation of the vibration of the transmission member 12. Moreover, the first rotating part 141 of the first rotating member 14 seals the gap between the inner side wall of the first hole 111 and the outer side wall of the transmission member 12, so that the liquid cannot pass through the first hole 111, avoiding the liquid from seeping in, and improving the waterproof ability. It is worth noting that the first rotating member 14 can be fixedly installed on the outer side of the transmission member 12, or can be fixedly installed on the inner side wall of the first hole 111, which are all within the protection scope of the present application. The material of the first rotating member 14 includes but is not limited to soft glue, and the present application does not make further limitation.

[0048] Preferably, a plurality of elastic protrusions 1411 are further arranged on the outer side wall of the first rotating part 141 at intervals, and the elastic protrusions 1411 are arranged at intervals along the axial direction of the shell 11 and are elastically connected with the inner side wall of the first hole 111.

[0049] In this embodiment, the first rotating part 141 is provided with a plurality of elastic protrusions 1411 on the outer side wall in contact with the first hole 111, which can further reduce the contact area between the first rotating part 141 and the first hole 111, thereby further reducing the friction between the first hole 111 and the first rotating part 141; at the same time, the elastic protrusions 1411 are elastically connected with the inner side wall of the first hole 111, which can also increase the waterproof capability of the first rotating part 141.

[0050] Specifically, the inner side wall of the first hole 111 has a relatively long axial length, so that the contact area between the inner side wall of the first hole 111 and the transmission part 12 is too large, which may result in excessive friction between the first rotating part 141 and the first hole 111. Therefore, a plurality of elastic protrusions 1411 are arranged at intervals on the outer circle of the first rotating part 141, the outer circle of the elastic protrusions 1411 is in contact with the inner side wall of the first hole 111, thereby reducing the contact area between the first rotating part 141 and the inner side wall of the first hole 111, which can effectively solve the problem of excessive friction between the first rotating part 141 and the inner side wall of the first hole 111, and at the same time, the gaps between the plurality of elastic protrusions 1411 can provide a larger deformation space for the first rotating part 141, thereby enhancing the elastic effect of the first rotating part 141 and making the first rotating part 141 have stronger damping effect.

[0051] Further, the transmission part 12 is further provided with a rotating groove 122 at a position corresponding to the first hole 111, and the first rotating part 141 is arranged in the rotating groove 122; the first rotating part 14 further comprises a second rotating part 142, the second rotating part 142 is arranged at one end of the first rotating part 141 away from the bristle holder 13, and the second rotating part 142 is elastically connected with the end of the first hole 111 away from the bristle holder 13 and the side wall of the rotating groove 122 away from the bristle holder 13.

[0052] In this embodiment, the first rotating part 14 is fixedly installed in the rotating groove 122 of the transmission part 12, which can avoid dislocation and movement of the first rotating part 14 when the transmission part 12 rotates, thereby increasing the reliability of the first rotating part 14; the second rotating part 142 is arranged at the end of the first hole 111 away from the bristle holder 13 and the side wall of the rotating groove 122 away from the bristle holder 13, which can effectively avoid the impact between the transmission part 12 and the shell 11, thereby avoiding damage and vibration transmission of the transmission part 12.

[0053] Specifically, the second rotating part 142 is connected to the end of the first rotating part 141 away from the bristle holder 13 and is arranged radially along the shell 11, the second rotating part 142 is elastically connected to the end of the first hole 111 away from the bristle holder 13 and the side wall of the rotating groove 122 away from the bristle holder 13, the second rotating part 142 is to solve the problem of the rotating groove 122 colliding with the shell 11 along the axial direction of the shell 11, in particular, when the driving shaft 21 is connected with the connecting groove 121, the driving shaft 21 will give the transmission member 12 a force along the axial direction of the shell 11, at this time the driving shaft 21 will drive the transmission member 12 to move to the side close to the bristle holder 13 and collide with the end of the first hole 111 of the shell 11, therefore the second rotating part 142 plays a buffering role, which can effectively avoid the collision between the transmission member 12 and the shell 11 and avoid damage to the transmission member 12 and vibration transmission.

[0054] Further, referring to Figure 2 , the bristle holder 13 is arranged axially away from the shell 11, and the outer side of the bristle holder 13 is further sleeved with a seat soft shell 131, and the outer side wall of the end of the shell 11 close to the bristle holder 13 is further provided with a placing groove, and the seat soft shell 131 is at least partially arranged in the placing groove.

[0055] In this embodiment, the seat soft shell 131 is in soft contact with the placing groove of the shell 11 and shields the gap between the bristle holder 13 and the shell 11, so that the appearance of the toothbrush head 1 is more beautiful and more waterproof, and the soft contact between the seat soft shell 131 and the shell 11 can also avoid excessive friction between the bristle holder 13 and the shell 11 when the bristle holder 13 rotates, so that the rotation of the bristle holder 13 is not affected by the shell 11.

[0056] Specifically, the end of the shell 11 close to the bristle holder 13 is provided with a placing groove, and the part of the seat soft shell 131 beyond the bristle holder 1313 is sleeved in the placing groove, so that the overall toothbrush head 1 has a streamline shape, and the appearance of the toothbrush head 1 is more beautiful. The seat soft shell 131 is in soft contact with the shell 11, that is, when the bristle holder 13 rotates, the seat soft shell 131 deforms itself to adapt to the rotation of the bristle holder 13, without transmitting the rotating force to the shell 11. Moreover, the seat soft shell 131 just shields the gap between the bristle holder 13 and the shell 11, avoiding water from seeping into the gap. The seat soft shell 131 is made of soft rubber material, which is not limited further herein. At the same time, the soft contact between the seat soft shell 131 and the shell 11 can also avoid the transmission of vibration of the bristle holder 13 to the shell 11. It is worth noting that the seat soft shell 131 can also be partially arranged between the bristle holder 13 and the shell 11, so that the bristle holder 13 and the shell 11 are completely separated and do not contact.

[0057] Further, referring to Figures 4 to 6The accommodating cavity 110 is provided with a second hole 112 at the other end in the axial direction, and the second hole 112 is matched with the connecting groove 121. The connecting groove 121 is provided with a first fixed wall 1211 and a second fixed wall 1212, which are sequentially and spacedly arranged in the axial direction around the shell 11 and are adapted to abut and fix the driving shaft 21 of the toothbrush handle 2.

[0058] In the embodiment, the first fixed wall 1211 and the second fixed wall 1212 are sequentially and spacedly arranged in the connecting groove 121, and the driving shaft 21 of the toothbrush handle 2 is adapted to be inserted into the connecting groove 121 before and after rotation, so that the driving shaft 21 can be matched with the connecting groove 121 of the transmission member 12 before and after rotation, and the transmission member 12 can be normally connected with the driving shaft 21.

[0059] Specifically, the first fixed wall 1211 is a straight wall, and the second fixed wall 1212 is an arc-shaped wall. The pair of second fixed walls 1212 are symmetrically arranged in the axial direction of the shell 11 and oppositely located on the front surface and the back surface of the toothbrush head 1. The first fixed wall 1211 connects the two ends of the pair of second fixed walls 1212, and the end of the driving shaft 21 is matched with the connecting groove 121. It is worth noting that the connecting groove 121 is a commonly used technology in the art, which makes the transmission member 12 connected with the driving shaft 21. The connecting groove 121 of the present application only needs to ensure that the driving shaft 21 can be connected with the connecting groove 121 before and after rotation, and the specific structure of the connecting groove 121 is not described and limited herein. In the variant embodiment, the inner side wall of the connecting groove 121 can also be circular, and the outer side wall of the driving shaft 21 is also circular, so that the driving shaft 21 is always matched with the connecting groove 121 regardless of the angle of rotation of the connecting groove 121 around the shell 11.

[0060] Preferably, the connecting groove 121 is further provided with a guide wall 1213, which is arranged at one end of the connecting groove 121 away from the bristle holder 13. The driving shaft 21 of the toothbrush handle 2 is adapted to drive the transmission member 12 to rotate along the guide wall 1213, so that the connecting groove 121 is matched with the driving shaft 21.

[0061] In the embodiment, the one end of the connecting groove 121 away from the bristle holder 13 is further provided with the guide wall 1213, which is symmetrically arranged on both sides of the shell 11 in the axial direction. When the bristle holder 13 is not rotated to the position, the driving shaft 21 can be slid into the connecting groove 121 along the guide wall 1213. At this time, the transmission member 12 is also rotated by the rotating force of the driving shaft 21, so that the connecting groove 121 is matched with the driving shaft 21. The guide wall 1213 can effectively avoid the situation that the driving shaft 21 cannot be inserted into the connecting groove 121, thereby avoiding the problem that the toothbrush head 1 and the toothbrush handle 2 cannot be installed.

[0062] Specifically, in the present application, the driving shaft 21 is only connected with the connecting groove 121 of the transmission member 12 rotating 180 degrees around the shell 11. Sometimes, the angle of the transmission member 12 rotating around the shell 11 can be greater than or less than 180 degrees, that is, the driving shaft 21 and the connecting groove 121 can not be matched in the circumferential direction, and therefore the guiding wall 1213 is further arranged at the end of the connecting groove 121 away from the bristle holder 13. The driving shaft 21 can drive the transmission member 12 to rotate correspondingly through the guiding wall 1213, so that the connecting groove 121 and the driving shaft 21 are matched with each other. The guiding wall 1213 is arranged obliquely at the end of the first fixed wall 1211 of the connecting groove 121 away from the bristle holder 13. The driving shaft 21 is limited to contact the guiding wall 1213 and then enter the connecting groove 121 to abut against the first fixed wall 1211 and the second fixed wall 1212. However, the rotation of the bristle holder 13 cannot be truly rotated 180 degrees sometimes, so that the connecting groove 121 and the driving shaft 21 can not be matched. At this time, the guiding wall 1213 is needed to make the transmission member and the bristle holder 13 rotate, so that the connecting groove 121 and the driving shaft 21 are matched. A pair of guiding walls 1213 extend from the end of the first fixed wall 1211 away from the bristle holder 13 to the side away from each other along the shell 11, so that the guiding wall 1213 is arranged obliquely. When the driving shaft 21 abuts against the guiding wall 1213, a rotating force can be provided for the transmission member 12, so that the transmission member 12 rotates. It is worth noting that the inclination angle and direction of the guiding wall 1213 are not limited further in the present application, as long as the guiding wall 1213 can drive the transmission member 12 to rotate a certain angle around the shell 11. In the transformed embodiment, the guiding wall 1213 can also be spirally arranged, which all belongs to the protection scope of the present application. Meanwhile, the driving shaft 21 should be arranged correspondingly with the connecting groove 121, which is not described in detail here.

[0063] Further, the shaft sleeve 15 is arranged in the second hole 112, which is suitable for fixedly connecting the connecting seat 22 of the toothbrush handle 2. The transmission member 12 is further provided with the second rotating member 16 at the other end thereof, which is located between the end of the transmission member 12 away from the bristle holder 13 and the end of the shaft sleeve 15 close to the bristle holder 13.

[0064] In the embodiment, the end of the transmission member 12 away from the bristle holder 13 is further provided with the second rotating member 16, which avoids the direct contact between the transmission member 12 and the shaft sleeve 15, reduces the friction between the transmission member 12 and the shaft sleeve 15, and also avoids the vibration of the transmission member 12 being transmitted to the shaft sleeve 15.

[0065] Specifically, the connecting seat 22 of the toothbrush handle 2 is adapted to be fixedly connected with the shaft sleeve 15 in the shell 11, so that the driving shaft 21 of the toothbrush handle 2 is connected into the connecting groove 121 of the transmission member 12 after passing through the second hole 112 of the shell 11 and the shaft sleeve 15, so that the connecting groove 121 of the transmission member 12 is hard connected with the driving shaft 21, and the driving shaft 21 directly transmits the vibration to the transmission member 12. In the application, the outer side of the transmission member 12 is provided with a mounting block, the shaft sleeve 15 is provided with a mounting groove, and the mounting block is fixedly mounted in the mounting groove. The connecting mode of the shaft sleeve 15 and the connecting seat 22 can also be other modes such as clamping pieces and locking pieces, and the connecting mode of the shaft sleeve 15 and the connecting seat 22 is not limited further in the application. During the mounting process of the shaft sleeve 15 and the connecting seat 22 of the toothbrush handle 2, the connecting seat 22 can drive the shaft sleeve 15 to move axially and abut against the transmission member 12, so a second rotating member 16 is arranged between the transmission member 12 and the shaft sleeve 15 to eliminate the risk of friction or impact caused by abutment. The second rotating member 16 is further provided with an opening in the middle, and the opening facilitates the driving shaft 21 to pass through.

[0066] Further, referring to Figure 1 , the application further provides an electric toothbrush, which comprises the rotatable toothbrush head 1 and the toothbrush handle 2 of any one of the above preferred embodiments, the connecting seat 22 of the toothbrush handle 2 is adapted to be fixedly connected with the shaft sleeve 15 of the toothbrush head 1, the driving shaft 21 of the toothbrush handle 2 is adapted to be connected with the transmission member 12 of the toothbrush head 1 before and after rotation, and the toothbrush handle 2 is further provided with a button 23 on the side wall, the button 23 is located on the front surface of the toothbrush handle 2, and the bristle holder 13 of the toothbrush head 1 is rotatably mounted in the shell 11, so that the bristles of the bristle holder 13 are located on the same side or the opposite side of the button 23, that is, the bristles of the bristle holder 13 can face the front surface of the toothbrush handle 2 or the back surface of the toothbrush handle 2. In the embodiment, the bristles on the bristle holder 13 can be located on the same side or the opposite side of the electric toothbrush by rotating the bristle holder 13 relative to the shell 11, so that the electric toothbrush can be used for self-brushing or for brushing others, the use scene is wider, and the user experience is better.

[0067] It should be explained that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the application, and it should be pointed out that for ordinary skilled in the art, without departing from the principle of the application, a number of improvements and refinements can be made, which should also be considered as the protection range of the application.

Claims

1. A rotatable toothbrush head, characterized in that, The toothbrush head comprises a housing, a transmission member and a bristle holder. The transmission member is rotatably installed on the housing, and one end of the transmission member is fixedly connected with the bristle holder after penetrating through the housing in an axial direction, so that the bristle holder is rotatably installed on the housing through the transmission member. The other end of the transmission member is provided with a connecting groove, and the connecting groove is adapted to fixedly connect with a driving shaft of a toothbrush handle before and after the transmission member is rotated.

2. The toothbrush head according to claim 1, wherein the housing is provided with a receiving cavity, and an axial end of the receiving cavity is provided with a first hole, and the one end of the transmission member is adapted to penetrate through the first hole. The outer wall of the transmission member is further provided with a first rotating member, and the first rotating member is arranged between the inner wall of the housing and the outer wall of the transmission member, so that the transmission member is rotatably arranged in the housing.

3. The toothbrush head according to claim 2, wherein the first rotating member comprises a first rotating part, and the first rotating part is elastically arranged between the inner wall of the first hole and the outer wall of the transmission member, so that the part of the transmission member located between the housing and the inner wall of the housing is spaced apart from each other.

4. The toothbrush head according to claim 3, wherein the outer wall of the first rotating part is further provided with a plurality of elastic protrusions which are spaced apart and arranged in an axial direction of the housing and elastically connected with the inner wall of the first hole.

5. The toothbrush head according to claim 3, wherein the transmission member is further provided with a rotating groove at a corresponding position of the first hole, and the first rotating part is arranged in the rotating groove. The first rotating member further comprises a second rotating part which is arranged at the end of the first rotating part away from the bristle holder, and the second rotating part is elastically connected with the end of the first hole and the side wall of the rotating groove away from the bristle holder.

6. The toothbrush head according to claim 5, wherein the bristle holder and the housing are spaced apart in the axial direction of the housing, and the outer side of the bristle holder is further sleeved with a seat soft shell, and the outer side wall of the housing near the bristle holder is further provided with a placing groove, and the seat soft shell is at least partially arranged in the placing groove.

7. The toothbrush head according to any one of claims 2-6, wherein an axial other end of the receiving cavity is provided with a second hole which is matched with the connecting groove. The connecting groove is provided with a first fixed wall and a second fixed wall which are sequentially and spaced apart in the axial direction of the housing and are adapted to abut and fix with the driving shaft of the toothbrush handle.

8. The toothbrush head according to claim 7, wherein the connecting groove is further provided with a guide wall which is arranged at the end of the connecting groove away from the bristle holder, and the driving shaft of the toothbrush handle is adapted to drive the transmission member to rotate along the guide wall, so that the connecting groove is matched with the driving shaft.

9. The toothbrush head according to claim 8, wherein ​ ​ ​ ​ ​ ​ ​ The second hole is provided with a shaft sleeve, which is adapted to fixedly connect a connecting seat of the toothbrush handle, and the transmission member is further provided with a second rotating member at the other end, which is located between the end of the transmission member away from the bristle seat and the end of the shaft sleeve close to the bristle seat.

10. An electric toothbrush characterized by comprising: The toothbrush comprises the rotatable toothbrush head and the toothbrush handle, the connecting seat of the toothbrush handle is adapted to fixedly connect the shaft sleeve of the toothbrush head, the driving shaft of the toothbrush handle is adapted to connect the transmission member of the toothbrush head, the toothbrush handle is further provided with a button on the side wall, and the bristle seat of the toothbrush head is rotatably installed in the shell, so that the bristles of the bristle seat are located on the same side or the opposite side of the button.

Images