Electric toothbrush head

Abstract

The invention discloses an electric toothbrush head. The electric toothbrush head comprises a shell; the brush head is mounted at the first end of the shell; the transmission assembly is installed in the shell, the transmission assembly comprises a first transmission part and a second transmission part which are connected with each other, the first transmission part is connected with the brush head, and the second transmission part is connected with a driving shaft of the electric toothbrush; the first transmission part is provided with a connecting cavity used for being connected with the second transmission part, the second transmission part is provided with a spherical connector connected with the connecting cavity in an inserted mode, the side wall of the connecting cavity is provided with a first fixing hole communicated with the connecting cavity, and the spherical connector is provided with a second fixing hole corresponding to the first fixing hole. The first fixing hole and the second fixing hole are connected through a fixing pin. The problems that an electric toothbrush is unstable in transmission, the swing radian and frequency of a brush head are unstable, and the user experience is poor are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of toothbrushes, and particularly to an electric toothbrush head. Background Art

[0002] Electric toothbrushes are widely popular in the market due to their good cleaning effect. When an electric toothbrush is working, a driving component drives the toothbrush head to generate high-frequency vibrations, decomposing toothpaste into fine foam to deeply clean the tooth gaps. At the same time, the vibration of the bristles can promote blood circulation in the oral cavity and has a massaging effect on the gingival tissue. The transmission structure of existing electric toothbrush heads is designed complexly, and the transmission process is unstable, resulting in unstable swing arc and frequency of the toothbrush head, which affects the user experience. Summary of the Invention

[0003] The main purpose of the present invention is to provide an electric toothbrush head, aiming to solve the problems of unstable transmission of existing electric toothbrushes, unstable swing arc and frequency of the toothbrush head, and poor user experience.

[0004] To achieve the above object, the present invention provides an electric toothbrush head, including:

[0005] A housing;

[0006] A toothbrush head, installed at the first end of the housing;

[0007] A transmission component, installed inside the housing. The transmission component includes a first transmission member and a second transmission member connected to each other. The first transmission member is connected to the toothbrush head, and the second transmission member is connected to the drive shaft of the electric toothbrush;

[0008] The first transmission member is provided with a connection cavity for connecting the second transmission member. The second transmission member is provided with a spherical connection head inserted into the connection cavity. The side wall of the connection cavity is provided with a first fixing hole communicating with the connection cavity. The spherical connection head is provided with a second fixing hole corresponding to the first fixing hole. The first fixing hole and the second fixing hole are connected by a fixing pin.

[0009] Optionally, the drive shaft of the electric toothbrush is a magnetic drive shaft, and the second transmission member is detachably installed with a magnetic attraction member magnetically attracted to the drive shaft.

[0010] Optionally, the magnetic attraction member is set as a screw, and the second transmission member is provided with a threaded hole connected to the screw.

[0011] Optionally, the toothbrush head includes bristles and a transmission seat. The end of the transmission seat is provided with a rotation hole and an eccentric hole. The rotation hole is located at the rotation center of the transmission seat; A first connecting shaft connected to the rotation hole is installed inside the housing, and a second connecting shaft connected to the eccentric hole is installed on the first transmission member.

[0012] Optionally, a gasket is sleeved outside the first connecting shaft, and the gasket abuts against the end of the transmission seat.

[0013] Optionally, a metal protective sleeve is sleeved outside the second connecting shaft, and the metal protective sleeve is located between the second connecting shaft and the eccentric hole.

[0014] Optionally, a limiting post is installed inside the housing, and a limiting groove corresponding to the limiting post is formed in the side surface of the transmission seat along its rotation direction.

[0015] Optionally, a guiding groove is further formed in the side surface of the transmission seat along its rotation direction, and a guiding protrusion adapted to the guiding groove is arranged inside the housing.

[0016] Optionally, a tail cover is further installed at the second end of the housing. The tail cover is inserted into the second end of the housing. A fixing clamping platform and an annular rib are arranged on the outer side of the tail cover. A fixing clamping hole for clamping with the fixing clamping platform and an annular clamping groove for clamping with the annular rib are formed in the housing.

[0017] Optionally, an elastic damping arm is further arranged on the outer side of the tail cover. A limiting boss is arranged at the end of the elastic damping arm, and a limiting groove is arranged at the bottom of the tail cover.

[0018] The beneficial effects of the present invention are as follows: The structure of the existing electric toothbrush head is improved. The transmission component is arranged as a split structure, including a first transmission member and a second transmission member. The first transmission member is provided with a connection cavity for connecting the second transmission member. The second transmission member is provided with a spherical connection head inserted into the connection cavity. A first fixing hole communicating with the connection cavity is formed in the side wall of the connection cavity. A second fixing hole corresponding to the first fixing hole is formed in the spherical connection head. The first fixing hole and the second fixing hole are connected by a fixing pin; thereby, the movement track of the transmission member can be flexibly adjusted, the driving force of the driving shaft is stably transmitted to the toothbrush head, the swinging angle and frequency of the toothbrush head are more stable, and the user experience is improved. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the overall structure of the electric toothbrush head of the present invention;

[0021] Figure 2 It is an exploded view of the structure of the transmission component of the present invention;

[0022] Figure 3 Schematic diagram of the bottom shell structure of the present invention;

[0023] Figure 4 Schematic diagram of the brush head structure of the present invention;

[0024] Figure 5 Schematic diagram of another perspective of the brush head structure of the present invention;

[0025] Figure 6 Schematic diagram of the tail cap structure of the present invention;

[0026] Figure 7 Schematic diagram of another perspective of the tail cap structure of the present invention;

[0027] Figure 8 Cross-sectional view of the structure of the electric toothbrush of the present invention;

[0028] Figure 9 Exploded view of the structure of the electric toothbrush of the present invention;

[0029] The realization, functional features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0031] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0032] In addition, if the embodiments of the present invention involve descriptions such as "first" and "second", the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] An embodiment of the present invention provides an electric toothbrush head. Refer to Figure 1 and Figure 2 , including:

[0034] A housing 1;

[0035] A brush head 2, installed at the first end of the housing 1;

[0036] A transmission assembly, installed inside the housing 1. The transmission assembly includes a first transmission member 31 and a second transmission member 32 connected to each other. The first transmission member 31 is connected to the brush head 2, and the second transmission member 32 is connected to the drive shaft of the electric toothbrush;

[0037] Refer to Figure 2 , the first transmission member 31 is provided with a connection cavity 311 for connecting the second transmission member 32. The second transmission member 32 is provided with a spherical connection head 321 inserted into the connection cavity 311. A first fixing hole 312 communicating with the connection cavity 311 is opened on the side wall of the connection cavity 311. A second fixing hole 322 corresponding to the first fixing hole 312 is opened on the spherical connection head 321. The first fixing hole 312 and the second fixing hole 322 are connected by a fixing pin 33.

[0038] It should be noted that during the transmission process of the transmission assembly, the drive shaft of the electric toothbrush will drive the transmission assembly to perform reciprocating motion. In this embodiment, the structure of the transmission assembly is improved, and the transmission assembly is set as a split structure, including a first transmission member 31 and a second transmission member 32 that are connected to each other. Among them, the first transmission member 31 is provided with a connection cavity 311, and the second transmission member 32 is provided with a spherical connection head 321 inserted into the connection cavity 311. The two are fixed together through the structure of a fixing pin 33 and a fixing hole. Since the first transmission member 31 and the second transmission member 32 are connected by the spherical connection head 321, they can rotate relative to each other, so as to flexibly transmit the linear reciprocating driving force of the drive shaft, and can also automatically adjust the angle to ensure the stability of power transmission. In this embodiment, both sides of the spherical connection head 321 perpendicular to the movement direction of the transmission assembly are plane structures, and the plane structures are abutted against the inner side surface of the connection cavity 311, so as to prevent the first transmission member 31 and the second transmission member 32 from shaking up and down during the reciprocating motion, and ensure that they always move along the transmission direction, so as to ensure the stable operation of the first transmission member 31 and the second transmission member 32, and further improve the stability of power transmission.

[0039] Furthermore, the drive shaft of the electric toothbrush is a magnetic drive shaft, and the second transmission member 32 is detachably installed with a magnetic attraction member 34 that is magnetically attracted to the drive shaft. The connection between the drive shaft and the second transmission member 32 by magnetic attraction can ensure that the power at the output end of the drive shaft is transmitted to the second transmission member 32, and can also facilitate the quick replacement between the electric toothbrush head 2 and the electric toothbrush handle 5. The two can be assembled or disassembled only by plugging and unplugging, that is, plug and play. In this embodiment, the magnetic attraction member 34 is set as a screw, and the second transmission member 32 is provided with a threaded hole connected to the screw. Setting the magnetic attraction assembly as a screw can facilitate the installation and replacement of the magnetic attraction assembly. In this embodiment, the screw can be any one of the existing cross-shaped screws, flat-head screws, round-hole hexagon screws, external hexagon self-tapping screws, machine screws, etc.

[0040] Furthermore, referring to Figure 4 and Figure 5, the brush head 2 includes bristles 21 and a transmission seat 22. A rotation hole 221 and an eccentric hole 222 are formed at the end of the transmission seat 22. The rotation hole 221 is located at the rotation center of the transmission seat 22. A first connecting shaft 11 connected to the rotation hole 221 is installed inside the housing 1, and a second connecting shaft 35 connected to the eccentric hole 222 is installed on the first transmission member 31. During the transmission process, the transmission assembly performs a reciprocating linear drive. The second connecting shaft 35 of the first transmission member 31 will apply a reciprocating force to the eccentric hole 222 of the transmission seat 22, and the rotation hole 221 of the transmission seat 22 can rotate around the first connecting shaft 11, so as to realize the forward and reverse rotation of the transmission seat 22 driven by the second connecting shaft 35, realize the forward and reverse rotation of the bristles 21 in the oral cavity, and clean the oral cavity.

[0041] Further, a gasket 12 is sleeved outside the first connecting shaft 11, and the gasket 12 abuts against the end of the transmission seat 22. Since the transmission seat 22 needs to rotate around the first connecting shaft 11 frequently and has a large wear, a gasket 12 is sleeved outside the connecting shaft to protect the structure and improve the stability of the rotation process.

[0042] Further, a metal protective sleeve 36 is sleeved outside the second connecting shaft 35, and the metal protective sleeve 36 is located between the second connecting shaft 35 and the eccentric hole 222. Similarly, the second connecting shaft 35 and the eccentric hole 222 also need to rotate relative to each other frequently. By sleeving a metal protective sleeve 36 outside the second connecting shaft 35, the structure can be protected and the service life can be improved. In this embodiment, the metal protective sleeve 36 can be set as a steel sleeve.

[0043] Further, referring to Figure 3 , a limit post 13 is installed on the inner side of the housing 1, and a limit groove 223 corresponding to the limit post 13 is formed on the side surface of the transmission seat 22 along its rotation direction. During the rotation of the transmission seat 22, the limit post 13 can abut against both ends of the limit groove 223, so as to limit the rotation angle of the transmission seat 22.

[0044] Further, a guide groove 224 is also formed on the side surface of the transmission seat 22 along its rotation direction, and a guide protrusion 14 adapted to the guide groove 224 is provided on the inner side of the housing 1. By adapting the guide protrusion 14 to the guide groove 224, the rotation of the transmission seat 22 can be limited and guided, preventing the transmission seat 22 from jumping during the rotation process and ensuring the stability of power transmission.

[0045] Further, the electric toothbrush head 2 in this embodiment is used for detachably mounting on the handle 5 of the electric toothbrush. To ensure the connection stability between the electric toothbrush head 2 and the handle 5 of the electric toothbrush, a tail cap 4 is further installed at the second end of the housing 1 of this embodiment. The tail cap 4 is made of an elastic material, such as rubber in the prior art. The elastic deformation of the rubber can tightly plug the electric toothbrush head 2 and the handle 5 of the electric toothbrush together to ensure the stability of the structure. Refer to Figure 6 and Figure 7 , the tail cap 4 is plugged into the second end of the housing 1. A fixed clamping platform 41 and an annular bone position 42 are provided on the outer side of the tail cap 4. The housing 1 is provided with a fixed clamping hole 15 that is clamped with the fixed clamping platform 41 and an annular clamping groove that is clamped with the annular bone position 42. Through the structures of the fixed clamping platform 41 and the annular bone position 42, it can be ensured that the tail cap 4 and the housing 1 are tightly connected together.

[0046] Further, an elastic damping arm 43 is further provided on the outer side of the tail cap 4. The damping arm makes the feel better during the long-term replacement and insertion and extraction process between the electric toothbrush handle 5 and the electric toothbrush head 2, with a damping feel, making the cooperation between the electric toothbrush handle 5 and the electric toothbrush head 2 tighter. A limiting boss 44 is provided at the end of the elastic damping arm 43, and a limiting groove 45 is provided at the bottom of the tail cap 4. The limiting boss 44 and the limiting groove 45 prevent the tail cap 4 from deviating left and right during the assembly process with the housing 1, and there will be no dislocation after assembly, and the cooperation is tighter, effectively preventing the position of the tail cap 4 and the housing 1 from rotating. In this embodiment, the tail cap 4 and the housing 1 are tightly assembled, and the electric toothbrush handle 5 and the electric toothbrush head 2 are also tightly matched. During the working state, when the transmission component reciprocates, the housing 1 is stable and does not shake, making the transmission during the working state more stable. The housing 1 remains stationary in the oral cavity, and the bristle 21 part rotates to improve the user experience and reduce the transmission noise.

[0047] The above are only the optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An electric toothbrush head, characterized in that, comprising: a housing; a brush head, mounted on the first end of the housing; a transmission assembly, mounted inside the housing, the transmission assembly includes a first transmission member and a second transmission member connected to each other, the first transmission member is connected to the brush head, and the second transmission member is connected to the drive shaft of the electric toothbrush; The first transmission member is provided with a connection cavity for connecting the second transmission member, the second transmission member is provided with a spherical connection head inserted into the connection cavity, the side wall of the connection cavity is provided with a first fixing hole communicating with the connection cavity, and the spherical connection head is provided with a second fixing hole corresponding to the first fixing hole, and the first fixing hole and the second fixing hole are connected by a fixing pin.

2. The electric toothbrush head according to claim 1, characterized in that, the drive shaft of the electric toothbrush is a magnetic drive shaft, and the second transmission member is detachably provided with a magnetic attraction member magnetically attracted to the drive shaft.

3. The electric toothbrush head according to claim 2, characterized in that, the magnetic attraction member is provided as a screw, and the second transmission member is provided with a threaded hole connected to the screw.

4. The electric toothbrush head according to claim 1, characterized in that, the brush head includes bristles and a transmission seat, the end of the transmission seat is provided with a rotation hole and an eccentric hole, and the rotation hole is located at the rotation center of the transmission seat; a first connecting shaft connected to the rotation hole is installed inside the housing, and a second connecting shaft connected to the eccentric hole is installed on the first transmission member.

5. The electric toothbrush head according to claim 4, characterized in that, a gasket is sleeved outside the first connecting shaft, and the gasket abuts against the end of the transmission seat.

6. The electric toothbrush head according to claim 4, characterized in that, a metal protective sleeve is sleeved outside the second connecting shaft, and the metal protective sleeve is located between the second connecting shaft and the eccentric hole.

7. The electric toothbrush head according to claim 4, characterized in that, a limiting post is installed on the inner side of the housing, and a limiting groove corresponding to the limiting post is provided on the side surface of the transmission seat along its rotation direction.

8. The electric toothbrush head according to claim 4, characterized in that, a guiding groove is further provided on the side surface of the transmission seat along its rotation direction, and a guiding protrusion adapted to the guiding groove is provided on the inner side of the housing.

9. The electric toothbrush head according to claim 1, characterized in that, a tail cap is further installed at the second end of the housing, the tail cap is inserted into the second end of the housing, a fixing card table and an annular bone position are provided on the outer side of the tail cap, and a fixing card hole for clamping the fixing card table and an annular card slot for clamping the annular bone position are provided on the housing.

10. The electric toothbrush head according to claim 9, characterized in that, an elastic damping arm is further provided on the outer side of the tail cap, a limiting boss is provided at the end of the elastic damping arm, and a limiting groove is provided at the bottom of the tail cap.

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