Brush head swinging mechanism and electric toothbrush
By using two spur gears to mesh transmission in the brush head swing mechanism, the structure is simplified, and the problem of high noise in the existing brush head rotation swing is solved, achieving a more stable and silent transmission effect.
Patent Information
- Application Number
- CN202322823976.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-20
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2033-10-20
AI Technical Summary
The existing brush head rotation and swing mechanism is noisy, affecting the user experience.
Two spur gears are used to mesh the transmission, and the transmission seat drives the rotation shaft to rotate through the transmission member, simplifying the structure and reducing manufacturing difficulty and cost.
Through the side-engaged spur gear transmission, the impact of axial tolerance on the meshing transmission is reduced, the stability of the transmission is ensured, the transmission noise is reduced, and the user experience is improved.
Smart Images
Figure CN222467173U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oral care, in particular to a brush head swing mechanism and an electric toothbrush. Background Art
[0002] Most electric toothbrushes on the market clean the surface of teeth by vibrating the brush head or rotating the bristles. Traditional toothbrushes are cleaned by manually rotating the toothbrush. Due to the difference in the use of electric toothbrushes and traditional toothbrushes, many consumers are not used to using electric toothbrushes for brushing. Therefore, electric toothbrush manufacturers have developed brush heads with a rotating function. The bristles are driven to rotate by the brush head, thereby imitating manual brushing, reducing the difference between electric toothbrushing and traditional brushing, and thus increasing the usage rate of consumers. However, the existing brush head rotating and swinging mechanism usually includes a bracket and a motor, a bevel gear and a connecting member arranged on the bracket, wherein a gear is sleeved on the motor shaft, the gear is horizontally arranged above the bevel gear and meshes with the bevel gear, and the connecting member is arranged to rotate the brush head in conjunction with the bevel gear. Since the gear meshes with the bevel gear in the axial direction, and the bevel gear has a large space for axial shaking on the bracket, coupled with the influence of manufacturing tolerances, the meshing effect between the gears and the bevel gears is poor, the transmission noise is large, and the user experience is affected. Utility Model Content
[0003] The utility model discloses a brush head swing mechanism and an electric toothbrush, which have a simple structure and are intended to improve the problem that the existing brush head has a large rotation and swing noise, which affects the user experience.
[0004] The utility model adopts the following scheme:
[0005] A brush head swinging mechanism comprises a driving assembly, a transmission assembly and a rotating shaft, wherein the driving assembly comprises a motor and a first spur gear sleeved on the motor; the transmission assembly comprises a second spur gear, a transmission member and a transmission seat, the second spur gear is arranged on one side of the first spur gear and meshes with the first spur gear, the transmission member is adaptively connected to the second spur gear to drive the transmission seat to rotate; one end of the rotating shaft is adaptively connected to the transmission seat, and the other end is used to install the brush head; the motor is driven to drive the first spur gear to rotate in an operational manner, so that the second spur gear links the transmission member to drive the transmission seat to rotate, thereby causing the brush head arranged on the rotating shaft to rotate accordingly.
[0006] As a further improvement, the transmission member includes a transmission rod and a transmission block, one end of the transmission rod is inserted into the axial hole of the second spur gear, and the other end is provided with a positioning portion for connecting with the transmission block; the transmission block is provided with a positioning hole corresponding to the positioning portion, and the positioning portion is adapted to the positioning hole so that the transmission rod can drive the transmission block to rotate synchronously.
[0007] As a further improvement, the transmission seat has an eccentrically arranged assembly hole and a accommodating cavity located on one side of the assembly hole and arranged toward the transmission block. The transmission block has a driving portion extending into the accommodating cavity. When the transmission rod drives the transmission block to rotate, the driving portion abuts against the inner wall of the accommodating cavity to drive the transmission seat to rotate.
[0008] As a further improvement, the driving portion is in the shape of a column extending upward from the transmission block.
[0009] As a further improvement, the accommodating cavity is triangular in shape, and each angle is transitioned through an arc surface.
[0010] As a further improvement, the rotating shaft is provided with a section surface, and the section surface is adapted to limit the position of the limiting surface of the assembly hole, so that the rotating shaft rotates with the transmission seat.
[0011] In addition, an electric toothbrush is provided, comprising a brush handle, a brush head and the brush head swinging mechanism as described above.
[0012] As a further improvement, a bracket, a mounting plate and a fixing seat are provided in the brush handle, and the brush head swing mechanism is positioned with the bracket via the mounting plate and the fixing seat.
[0013] As a further improvement, a support member is sleeved on the outer side of the fixing seat, and the rotating shaft passes through the fixing seat and the support member.
[0014] As a further improvement, a sealing gasket is provided between the support member and the fixing seat, and the sealing gasket has a V-shaped opening for sealing with the rotating shaft.
[0015] By adopting the above technical solution, the utility model can achieve the following technical effects:
[0016] 1. The swing mechanism of the brush head is driven by two spur gears meshing together, and the transmission seat is driven by the linkage transmission member to drive the rotating shaft to rotate. Among them, the two spur gears are meshed by the side, which can reduce the influence of axial tolerance on the meshing transmission, thereby ensuring the stability of the transmission and reducing the transmission noise. In addition, the structure and process between the helical gear and the connecting member in the prior art are too complicated. The structure of the present application is simple, which can reduce the manufacturing difficulty and manufacturing cost.
[0017] 2. After the fixing base and the support are locked by screws, the bracket and the brush head swing mechanism are connected as one, which is convenient for the installation of the brush handle. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 is a cross-sectional view of one embodiment of the utility model along one cross section;
[0020] Figure 2 is a cross-sectional view of one embodiment of the utility model along another cross section;
[0021] Figure 3 It is a structural schematic diagram of a transmission block in one embodiment of the utility model;
[0022] Figure 4 This is a schematic diagram of the structure of a transmission seat in one embodiment of the utility model;
[0023] Figure 5 It is a structural schematic diagram of a transmission rod in one embodiment of the utility model;
[0024] Figure 6 This is a schematic structural diagram of a rotating shaft in one embodiment of the utility model;
[0025] Figure 7 This is a schematic structural diagram of a mounting plate in one embodiment of the utility model;
[0026] Figure 8 This is a schematic structural diagram of a fixing base in one embodiment of the utility model;
[0027] Fig. 9 It is a structural schematic diagram of a support member in one embodiment of the utility model;
[0028] Fig.10 This is a schematic structural diagram of a sealing gasket in one embodiment of the utility model;
[0029] Fig.11 and Fig.12 This is a schematic diagram of the structure of an electric toothbrush according to one embodiment of the utility model at different viewing angles;
[0030] Fig.13 It is an exploded view of an electric toothbrush according to one embodiment of the present invention.
[0031] icon:
[0032] 11-motor; 12-first spur gear;
[0033] 21-second spur gear; 22-transmission seat; 221-assembly hole; 222-accommodation cavity; 23-transmission rod; 231-positioning part; 24-transmission block; 241-positioning hole; 242-driving part;
[0034] 3- Rotating shaft;
[0035] 4-Brush head;
[0036] 5-brush handle; 51-bracket; 511-baffle; 52-mounting plate; 53-fixing seat; 531-channel; 54-support member; 55-sealing pad; 551-shoulder; 552-V-shaped opening; 56-sealing ring. DETAILED DESCRIPTION
[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.
[0038] Example
[0039] Combination Figures 1 to 6 The present embodiment provides a brush head swing mechanism, including a driving assembly, a transmission assembly and a rotating shaft 3. The swing mechanism described in the present invention refers to a mechanism that can drive the rotating shaft to rotate and swing, that is, drive the toothbrush head to swing repeatedly along the rotating shaft within a certain angle range; wherein the driving assembly includes a motor 11 and a first spur gear 12 sleeved on the motor 11; the transmission assembly includes a second spur gear 21, a transmission member and a transmission seat 22, the second spur gear 21 is arranged on one side of the first spur gear 12 and meshes with the first spur gear 12, the transmission member is adapted to be connected with the second spur gear 21 to drive the transmission seat 22 to rotate; one end of the rotating shaft 3 is adapted to be connected with the transmission seat 22, and the other end is used to install the brush head 4; the motor 11 is driven to drive the first spur gear 12 to rotate in an operable manner, so that the second spur gear 21 links the transmission member to drive the transmission seat 22 to rotate, thereby causing the brush head 4 arranged on the rotating shaft 3 to rotate accordingly.
[0040] It should be noted that in this embodiment, two spur gears are meshed to drive the transmission seat 22 to drive the rotating shaft 3 to rotate. The two spur gears are meshed through the side, which can reduce the influence of axial tolerance on the meshing transmission, thereby ensuring the stability of the transmission and reducing the transmission noise. In addition, the structure and process between the helical gear and the connecting member in the prior art are too complicated. The structure of this embodiment is simple, which can reduce the manufacturing difficulty and manufacturing cost.
[0041] In a preferred embodiment, the transmission member includes a transmission rod 23 and a transmission block 24. One end of the transmission rod 23 is inserted into the shaft hole of the second spur gear 21, and the other end is provided with a positioning portion 231 for connecting with the transmission block 24. The transmission block 24 is provided with a positioning hole 241 corresponding to the positioning portion 231. The positioning portion 231 is adapted to the positioning hole 241 so that the transmission rod 23 can drive the transmission block 24 to rotate synchronously. For example, the positioning portion 231 is a straight surface on the transmission rod 23, and the straight surface is matched with the positioning hole 241.
[0042] On the basis of the above-mentioned embodiment, in an optional embodiment of the utility model, the transmission seat 22 has an eccentrically arranged assembly hole 221 and a receiving cavity 222 located on one side of the assembly hole 221 and arranged toward the transmission block, and the transmission block 24 has a driving portion 242 extending in the receiving cavity 222. When the transmission rod 23 drives the transmission block 24 to rotate, the driving portion 242 abuts against the inner wall of the receiving cavity 222 to drive the transmission seat 22 to rotate. Preferably, the driving portion 242 is in the shape of a column extending upward from the transmission block 24, and the outer surface of the driving portion 242 is smooth. The receiving cavity 222 is triangular, and each angle is transitioned through an arc surface to avoid noise generated by sharp corners, while ensuring that the driving portion 242 moves smoothly in the receiving cavity 222. A section is provided on the rotating shaft 3, and the section is adapted to limit the position of the limiting surface of the assembly hole 221, so that the rotating shaft 3 rotates with the transmission seat 22.
[0043] In this embodiment, the transmission block 24 is driven to rotate by the transmission rod 23, so that the driving part 242 on the transmission block 24 abuts against the inner wall of the accommodating cavity 222, thereby driving the transmission seat 22 to rotate, and the shaft 3 limited by the assembly hole 221 of the transmission seat 22 is synchronously rotated, thereby driving the brush head 4 connected to the shaft 3 to rotate. The rotation angle limit can be controlled by the motor 11, or a structure that limits the rotation angle of the transmission seat 22 can be set, which is not specifically limited.
[0044] Combination Figures 7 to 13The utility model further provides an electric toothbrush, comprising a brush handle 5, a brush head 4 and a brush head swinging mechanism as described in any of the above embodiments. A bracket 51, a mounting plate 52 and a fixing seat 53 are provided in the brush handle 5, and the swinging mechanism of the brush head 4 is positioned with the bracket 51 via the mounting plate 52 and the fixing seat 53. For example, a baffle 511 is provided on the bracket 51, the motor 11 is mounted on one side of the baffle 511, the shaft of the motor 11 is extended on the other side of the baffle 511, the transmission rod 23 passes through the second spur gear 21 and is inserted into the mounting hole of the baffle 511, and the mounting plate 52 is arranged above the second spur gear 21 so that the second spur gear 21 is limited between the mounting plate 52 and the baffle 511, that is, the second spur gear 21 is axially limited. The transmission rod 23 passes through the mounting plate 52 to be connected with the transmission block 24. A channel 531 is provided on the fixed seat 53. The transmission seat 22 extends upward with a rotating portion adapted to the channel 531. The assembly hole 221 is arranged through the rotating portion, so that when the transmission block 24 abuts against the transmission seat 22, the rotating portion of the transmission seat 22 can be restricted in the channel 531 and rotate under the abutment of the transmission block 24, thereby synchronously driving the rotating shaft connected to the assembly hole 221 to rotate.
[0045] Preferably, a support member 54 is sleeved on the outer side of the fixing seat 53, and the rotating shaft 3 passes through the fixing seat 53 and the support member 54, and is inserted on the mounting plate 52. The fixing seat 53, the mounting plate 52 and the bracket 51 are fixed by screw locking, and the support member 54 and the fixing seat 53 are fixed by screw locking. Preferably, a sealing gasket 55 is provided between the support member 54 and the fixing seat 53, and the sealing gasket 55 has a V-shaped opening 552 for sealing with the rotating shaft 3. The support member 54 and the fixing seat 53 press the shoulder 551 of the sealing gasket 55, and the two sides of the V-shaped opening 552 are respectively in contact with the rotating shaft 3 and the fixing seat 53, so as to prevent water from flowing into the inside of the brush handle 5 along the rotating shaft 3 and causing damage to the electronic components. Furthermore, the outer periphery of the support member 54 is sleeved with a sealing ring 56 that is sealed with the inner wall of the brush handle 5, which can further prevent water from entering the brush handle 5.
[0046] It should be noted that, in this embodiment, the fixing seat 53 and the supporting member 54 are locked by screws so that the brush head swing mechanism is connected to the bracket as a whole, thereby facilitating installation.
[0047] In other embodiments, the brush handle 5 has a built-in circuit board, which is electrically connected to the motor 11, and the rotation angle and rotation frequency of the motor 11 are adjusted by triggering a button on the circuit board. The circuit structure and principle of the circuit board are prior art and will not be described in detail here.
[0048] The above are only preferred implementations of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.
Claims
1. A brush head swing mechanism, characterized in that: include: A driving assembly, comprising a motor and a first spur gear sleeved on the motor; A transmission assembly, comprising a second spur gear, a transmission member and a transmission seat, wherein the second spur gear is disposed on one side of the first spur gear and meshes with the first spur gear, and the transmission member is adaptively connected to the second spur gear to drive the transmission seat to rotate; A rotating shaft, one end of which is adapted to be connected to the transmission seat, and the other end of which is used to mount the brush head; The motor is driven to rotate the first spur gear in an operative manner, so that the second spur gear is linked to the transmission member to drive the transmission seat to rotate, thereby causing the brush head disposed on the rotating shaft to rotate accordingly.
2. The brush head oscillating mechanism according to claim 1, characterized in that: The transmission member includes a transmission rod and a transmission block. One end of the transmission rod is inserted into the axial hole of the second spur gear, and the other end is provided with a positioning portion for connecting with the transmission block; the transmission block is provided with a positioning hole corresponding to the positioning portion, and the positioning portion is adapted to the positioning hole so that the transmission rod can drive the transmission block to rotate synchronously.
3. The brush head oscillating mechanism according to claim 2, characterized in that: The transmission seat has an eccentrically arranged assembly hole and a receiving cavity located on one side of the assembly hole and arranged toward the transmission block. The transmission block has a driving part extending into the receiving cavity. When the transmission rod drives the transmission block to rotate, the driving part abuts against the inner wall of the receiving cavity to drive the transmission seat to rotate.
4. The brush head oscillating mechanism according to claim 3, characterized in that: The driving part is in a column shape extending upward from the transmission block.
5. The brush head oscillating mechanism according to claim 3, characterized in that: The accommodating cavity is triangular in shape, and each angle is transitioned through an arc surface.
6. The brush head oscillating mechanism according to claim 3, characterized in that: The rotating shaft is provided with a section surface, and the section surface is adapted to limit the position of the limiting surface of the assembly hole, so that the rotating shaft rotates with the transmission seat.
7. An electric toothbrush, characterized in that: The invention comprises a brush handle, a brush head and a brush head swinging mechanism as claimed in any one of claims 1 to 6.
8. The electric toothbrush according to claim 7, characterized in that: A bracket, a mounting plate and a fixing seat are arranged in the brush handle, and the brush head swing mechanism is positioned with the bracket via the mounting plate and the fixing seat.
9. The electric toothbrush according to claim 8, characterized in that: A support piece is sleeved on the outer side of the fixing seat, and the rotating shaft passes through the fixing seat and the support piece.
10. The electric toothbrush according to claim 9, characterized in that: A sealing gasket is arranged between the support member and the fixing seat, and the sealing gasket has a V-shaped opening for sealing with the rotating shaft.