CN210872164U - Brush head swinging mechanism for electric toothbrush - Google Patents

Abstract

The utility model discloses a brush head swing mechanism for an electric toothbrush, which is used for driving a brush head to swing relative to a hollow brush rod; the head swing mechanism includes a rotating shaft in which a hollow brush bar is disposed; one end of the shaft close to the brush head forms a guide inclined plane, and the other end of the shaft is linked with the driving part; a support sleeve which is arranged in the hollow brush rod and is sleeved on the rotating shaft; the two ends of the elastic piece respectively act on the support sleeve and the rotating shaft so that the guide inclined plane on the rotating shaft is pressed against the brush head; at least two balancing lugs formed or fixed on the brush head and extending towards the guide inclined plane; the upper guide inclined plane of the rotating shaft is supported against the two balance lugs under the action of the elastic piece, and the rotating shaft rotates to push the two balance lugs on the brush head to move obliquely along the guide inclined plane; the utility model provides a brush head swing mechanism, its simple structure, reasonable in design and easy realization need not extending structure can realize the swing of brush head, and transmission stability is good, difficult inefficacy.

Description

Brush head swinging mechanism for electric toothbrush

Technical Field

The utility model relates to the oral care industry, in particular to a brush head swing mechanism for an electric toothbrush.

Background

At present, most of the existing electric toothbrushes are used for cleaning teeth by driving a brush head to vibrate through a vibration motor; although the tooth cleaning is carried out without great manual operation, the tooth cleaning effect is general, the operation feeling is poor, the noise is large, and the resonance is easy to generate;

in order to solve the problems, research personnel design a rotatable brush head, namely, the brush head is driven to rotate by matching a motor with a complex transmission mechanism; specifically, the motor is connected with a telescopic structure firstly, then the telescopic structure is connected with the connecting rod, and the other end of the connecting rod is eccentrically connected with the back of the brush head; in the mode, the telescopic structure is required to drive the connecting rod to displace along the axial direction of the hollow brush rod, so that more parts and excessively complex structure are required; the connecting rod and the brush head are stressed at a single point, and the effect of driving the brush head to rotate is greatly reduced after a period of time; in addition, the connecting rod is simultaneously stressed by radial and axial forces in the telescopic process, so that the connecting rod is easy to bend, deform and even break; if adopt metallic connecting rod, then produce reaction force easily, fragile brush head or extending structure, and weight is overweight, influences user's experience and feels.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve current problem, provide a brush head swing mechanism for electric toothbrush, its simple structure, reasonable in design and easy realization need not extending structure can realize brushing the head swing, and transmission stability is good, difficult inefficacy.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a brush head swing mechanism for an electric toothbrush is used for driving a brush head to swing relative to a hollow brush rod; the method is characterized in that: this brush head swing mechanism includes:

a rotating shaft which is internally provided with a hollow brush rod; one end of the rotating shaft close to the brush head forms a guide inclined plane, and the other end of the rotating shaft is linked with the driving part;

a support sleeve which is arranged in the hollow brush rod and is sleeved on the rotating shaft;

the two ends of the elastic piece respectively act on the support sleeve and the rotating shaft so that the guide inclined plane on the rotating shaft is pressed against the brush head;

at least two balancing lugs formed or fixed on the brush head and extending towards the guide inclined plane;

the upper guide inclined plane of the rotating shaft is supported against the two balance lugs under the action of the elastic piece, and the rotating shaft rotates to push the two balance lugs on the brush head to move obliquely along the guide inclined plane, so that the brush head swings relative to the rotating shaft.

Furthermore, the two balancing lugs are symmetrically arranged.

Furthermore, the toothbrush also comprises a limiting structure which is used for limiting the toothbrush head to be separated from the hollow toothbrush rod; the limiting structure comprises a limiting column and a limiting chute; the limiting sliding groove is formed in the side wall of the brush head; the limiting column penetrates through the top of the hollow brush rod and is arranged in the limiting sliding groove.

Furthermore, the brush head comprises a brush hair part and an assembly part, and a groove is formed in the side wall of the assembly part; the brush head is characterized by also comprising a connecting rod which is arranged in the hollow brush rod, and one end of the connecting rod is inserted into the groove, so that the brush head rotates corresponding to the hollow brush rod.

Technical scheme for prior art, the beneficial effect who gains is:

(1) the utility model provides a brush head swing mechanism for electric toothbrush, which has simple structure, reasonable design and easy realization, the rotating shaft is directly connected with a driving part (motor), and the rotating shaft and the motor do the same rotating motion, thereby saving complex telescopic structure, saving cost, and simultaneously matching with an elastic part to provide more effective transmission, having better stability and being not easy to generate transmission failure phenomenon; in addition, the novel toothbrush realizes that the rotating shaft rotates, and the rotating shaft is always supported on the brush head by utilizing the acting force of the elastic part to drive the brush head to do reciprocating swing, so that teeth can be cleaned in two directions, gaps between the teeth can be cleaned quickly, the tooth cleaning effect is better, and the reaction force (namely the reaction force to a held hand) can be reduced by the elasticity of the elastic part; moreover, the novel rotating shaft cannot simultaneously generate radial force and axial force, is not easy to break or deform, and has longer service life;

(2) the balance lugs are symmetrically arranged, so that the swinging effect is better, effective and stable;

(3) the utility model is also provided with a limit structure, the brush head is prevented from being separated from the hollow brush rod by utilizing the limit chute and the limit column, and the maximum range of the swing is limited by the length of the limit chute;

(4) the utility model discloses it is more simple to brush first structure, and easy open mould shaping, manufacturing cost is lower, more is applicable to batch production.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a schematic view of a three-dimensional exploded structure of a brush head swing mechanism of the present invention;

fig. 2 is a sectional view of the brush head swing structure of the present invention.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention clearer and more obvious, the following description of the present invention with reference to the accompanying drawings and embodiments is provided for further details. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 1 and 2, a brush head swing mechanism for electric toothbrush, in order to do better cleanness, reach better clean tooth effect to the tooth, this novel adoption can realize the first swing mechanism 1 realization of brush of bidirectional swing, utilizes the first 1 linkage brush of first swing mechanism of brush to carry out two-way reciprocal cleaning, specifically as follows:

the brush head swinging mechanism 1 is used for driving the brush head 4 to swing relative to the hollow brush rod 2 of the electric toothbrush; the motor, controller, etc. of the conventional electric toothbrush will not be described herein; the hollow brush rod 2 is a part for installing the rotating shaft 3 and the brush head 4, and comprises a brush head installing cavity 22 and a rotating shaft turning cavity 21 which are arranged vertically;

this brush head swing mechanism 1 includes:

a rotating shaft 3 which is arranged in the rotating shaft loading cavity 21 of the hollow brush rod 2; one end of the rotating shaft 3 close to the brush head 4 forms a guide inclined plane 31, and the other end is linked with a driving part (not shown in the figure); the driving part (not shown in the figure) forms linkage, which means that the driving part can be directly connected with the motor, or indirectly connected with the motor, and only needs to form linkage matching;

a support sleeve 5 which is arranged in the rotating shaft loading cavity 21 of the hollow brush rod 2 and is sleeved on the rotating shaft 3;

the elastic element 6 is sleeved on the outer wall of the rotating shaft 3, and two ends of the elastic element respectively act on the supporting sleeve 5 and the rotating shaft 3 so that the guide inclined plane 31 on the rotating shaft 3 is pressed against the brush head 4;

a brush head 4 installed in a brush head installation cavity 22 of the hollow brush bar 2; the brush head 4 comprises a brush hair part 41 and an assembly part 42, the assembly part 42 is arranged in the brush head loading cavity 22, and the brush hair part 41 is exposed out of the hollow brush rod 2;

the upper side wall of the assembling part 42 is provided with the limiting sliding groove 421 and a groove 422; the brush head further comprises a connecting rod 7, the connecting rod 7 is arranged in the hollow brush rod 2, and one end of the connecting rod 7 is inserted into the groove 422, so that the brush head 4 rotates corresponding to the hollow brush rod 2;

at least two balancing protrusions 423 are disposed on the assembling portion 42 and opposite to the position of the limiting sliding groove 421;

the two balancing protrusions 423 are symmetrically arranged on the brush head 4, the arrangement may be integrally formed on the brush head 4, or may be fixedly connected to the brush head 4 through other fixing structures, and the two balancing protrusions 423 extend facing the guide inclined plane 31;

under the action of the elastic element 6, the upper guiding inclined plane 31 of the rotating shaft 3 is supported against the two balancing protrusions 423, and the rotating shaft 3 rotates to push the two balancing protrusions 423 on the brush head 4 to tilt along the guiding inclined plane 31, so that the brush head 4 swings relative to the rotating shaft 3.

More specifically, in order to prevent the brush head 4 from falling out of the brush head loading cavity 22 of the hollow brush rod 2, a limiting structure 8 is also arranged; the limiting structure 8 is used for limiting the brush head 4 to be separated from the hollow brush rod 2; the limiting structure 8 comprises a limiting column 81 and a limiting sliding groove 421; the limiting sliding groove 421 is arranged on the side wall of the brush head 4; the limiting column 81 penetrates through the top of the hollow brush rod 2 and is arranged in the limiting sliding groove 421.

As shown in fig. 1 and 2, during actual assembly and use, firstly, a hollow brush rod 2 is formed by injection molding, the hollow brush rod 2 comprises a rotating shaft loading cavity 21 for loading a rotating shaft 3 and a brush head loading cavity 22 for loading a brush head 4 assembly part 42, and the rotating shaft loading cavity 21 and the brush head loading cavity 22 are arranged vertically;

then, the elastic part 6 is sleeved on the periphery of the rotating shaft 3, the supporting sleeve 5 is sleeved on the rotating shaft 3, and the acting force of the elastic part 6 is adjusted subsequently; after the three components are pre-assembled, the hollow brush rod 2 is arranged at the inlet of the assembling cavity of the rotating shaft 3;

thirdly, the assembly part 42 of the brush head 4 is assembled from the entrance of the assembly cavity of the brush head 4, before the groove 422 is aligned with the connecting rod 7 which is already arranged in the hollow brush rod 2, and is inserted after being aligned with the position, so that the brush head 4 can rotate relative to the hollow brush rod 2; after the brush head is installed, the position is adjusted, the limiting column 81 is inserted from the top of the hollow brush rod 2, the limiting column 81 penetrates through the hollow brush rod 2 and is arranged in the limiting sliding groove 421, and the brush head 4 can only rotate (namely swing) within the range of the limiting sliding groove 421; when the limit matching of the limit column 81 and the limit sliding groove 421 is completed, the two balance lugs 423 on the assembling part 42 are also abutted against the guide inclined plane 31 on the rotating shaft 3;

finally, the elastic piece 6 is pressed only by adjusting the position of the support sleeve 5 on the hollow brush rod 2, and the elastic piece 6 can drive the rotating shaft 3 to always prop against the balance bump 423; the rotating shaft 3 is directly or indirectly connected with the motor, it should be noted that the rotating shaft 3 is directly connected with the output shaft of the motor, and other bridging components can be arranged between the two;

during the in-service use, control that the part control motor is rotatory, the motor rotates and drives pivot 3 and rotate, and when pivot 3 rotated, the direction inclined plane 31 of its tip was rotating thereupon, because the slope of direction inclined plane 31 sets up, keeps the balanced lug 423 of complex with its top and also moves thereupon, because the balanced lug 423 that the symmetry set up swings along with the motion of direction inclined plane 31, specifically: because the guide inclined plane 31 is obliquely arranged and has a lowest point and a lowest point, one of the balancing convex blocks 423 is positioned at the lowest point and the other balancing convex block 423 is positioned at the highest point during movement, and the brush head 4 rotates for an angle relative to the hollow brush rod 2; the guide inclined plane 31 moves continuously, the balance bump 423 originally located at the lowest point moves towards the highest point, the other balance bump 423 slides from the highest point to the lowest point and swings in the opposite direction, and the brush head 4 swings in a reciprocating manner; due to the limitation of the limiting sliding groove 421, the brush head 41 is prevented from falling off, and the swinging angle can be limited.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims (4)

1. A brush head swing mechanism for an electric toothbrush is used for driving a brush head to swing relative to a hollow brush rod; the method is characterized in that: this brush head swing mechanism includes:

a rotating shaft which is internally provided with a hollow brush rod; one end of the rotating shaft close to the brush head forms a guide inclined plane, and the other end of the rotating shaft is linked with the driving part;

a support sleeve which is arranged in the hollow brush rod and is sleeved on the rotating shaft;

the two ends of the elastic piece respectively act on the support sleeve and the rotating shaft so that the guide inclined plane on the rotating shaft is pressed against the brush head;

at least two balancing lugs formed or fixed on the brush head and extending towards the guide inclined plane;

the upper guide inclined plane of the rotating shaft is supported against the two balance lugs under the action of the elastic piece, and the rotating shaft rotates to push the two balance lugs on the brush head to move obliquely along the guide inclined plane, so that the brush head swings relative to the rotating shaft.

2. A brushhead oscillating mechanism for an electric toothbrush in accordance with claim 1, wherein: the two balance lugs are symmetrically arranged.

3. A brushhead oscillating mechanism for an electric toothbrush according to claim 1 or 2, wherein: the brush head is used for being separated from the hollow brush rod; the limiting structure comprises a limiting column and a limiting chute; the limiting sliding groove is formed in the side wall of the brush head; the limiting column penetrates through the top of the hollow brush rod and is arranged in the limiting sliding groove.

4. A brushhead oscillating mechanism for an electric toothbrush in accordance with claim 3, wherein: the brush head comprises a brush hair part and an assembly part, and a groove is formed in the side wall of the assembly part; the brush head is characterized by also comprising a connecting rod which is arranged in the hollow brush rod, and one end of the connecting rod is inserted into the groove, so that the brush head rotates corresponding to the hollow brush rod.

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