Electric oral cleaning tool

Abstract

Provided is an electric oral cleaning tool, comprising a housing (1), a transmission rod (2), and a brush head assembly (3). The brush head assembly (3) is movably connected to one end of the housing (1). A functional element (31) is arranged on one side of the brush head assembly (3), and a movable disc (32) is arranged on the other side of the brush head assembly (3). The movable disc (32) is provided with an engagement region, and the engagement region is eccentrically arranged relative to the brush head assembly (3). The transmission rod (2) is arranged inside the housing (1) and provided with an input end and an output end. The input end is configured for connecting a transmission structure, and the output end engages with the engagement region. The output end, when moving with distance relative to the center of the movable disc (32) being variable, drives the engagement region to rotate together with the brush head assembly (3). The transmission rod (2) or at least the input end is integrally formed. The transmission rod (2) or at least the input end is made of a magnetizable material. The output end is eccentrically arranged relative to the longitudinal axis of the input end. The movable disc (32) is also provided with a limiting structure (33), and the limiting structure (33) is configured for limiting the brush head assembly (3) in the axial direction.

Description

Electric oral cleaning tools

[0001] This application claims the priority of "the Chinese patent application filed with the China Patent Office on November 30, 2023, with application number 202323256975.4, and the invention name "Electric Oral Cleaning Tool"" and "the priority of the Chinese patent application filed with the China Patent Office on February 6, 2024, with application number 202420285135.6, and the invention name "Electric Oral Cleaning Tool"". The entire contents are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of toothbrushes, and in particular to an electric oral cleaning tool. Background Art

[0003] Electric toothbrushes are a common oral cleaning tool today and are mainly divided into sonic toothbrushes and rotary toothbrushes. The sonic brush head mainly uses high-frequency left and right swings to achieve vibration cleaning, while the rotary brush head mainly uses high-frequency left and right rotations to achieve efficient cleaning, with better cleaning effects.

[0004] The common rotary electric toothbrushes on the market are driven by a transmission structure that swings eccentrically left and right to the brush handle, and then from the brush handle to the brush head through multiple components. This requires the assembly and coordination of multiple structures, which not only increases the difficulty of assembly and production, but also easily leads to poor consistency in the swing amplitude of the brush head. After long-term use, the gap between the accessories increases, which also causes the noise to become louder and the swing amplitude to attenuate, affecting the cleaning effect and user experience.

[0005] Summary of the Invention

[0006] In view of this, the present application provides an electric oral cleaning tool to solve the problem that electric toothbrushes in the prior art have poor consistency and are easily affected in cleaning effect and user experience after long-term use.

[0007] To achieve one, part, or all of the above purposes or other purposes, the present application provides an electric oral cleaning tool, including a housing, a transmission rod, and a brush head assembly;

[0008] The brush head assembly is rotatably connected to one end of the housing, a functional element is provided on one side of the brush head assembly, and a movable disk is provided on the other side of the brush head assembly. A matching area is provided on the movable disk, and the matching area is offset from the center of the brush head assembly;

[0009] The transmission rod is arranged in the housing, and the transmission rod has an input end and an output end. The output end is eccentrically arranged relative to the input end in the axial direction of the transmission rod. The input end is used to connect with the transmission structure, and the output end cooperates with the matching area. When the output end performs a reciprocating motion with a variable diameter relative to the center of the movable disk, it drives the matching area and the brush head assembly to reciprocate together; the variable diameter means that the distance from the output end to the center of the movable disk changes during the reciprocating motion;

[0010] The transmission rod or at least the input end is integrally formed;

[0011] The transmission rod or at least the input end is made of a magnetizable material.

[0012] Furthermore, the matching area is a groove, the output end is provided with a guide rod, the guide rod is located in the groove, and the distance between the guide rod and the center of the brush head assembly is between 2 mm and 4 mm.

[0013] Furthermore, the guide rod is provided with a connecting block at one end away from the brush head assembly, and a limiting groove is provided on the inner side of the shell. The connecting block is located in the limiting groove and can move longitudinally in the limiting groove.

[0014] Furthermore, the matching area is a fixing rod, the output end is provided with a connecting hole, the fixing rod is located in the connecting hole, and when the connecting hole moves longitudinally, the fixing rod moves laterally in the connecting hole.

[0015] Furthermore, the output end is connected to the input end by bending, welding or assembly, and the output end is projected in an "L" shape, a "T" shape or a groove shape.

[0016] Furthermore, the transmission rod or at least the input end is made of plastic material mixed with magnetic powder.

[0017] Furthermore, a guide ring is fixed to the inner side wall of the shell, and the transmission rod passes through the guide ring and can move longitudinally back and forth in the guide ring.

[0018] Furthermore, the maximum reciprocating motion stroke of the transmission rod in the longitudinal direction is 1-5 mm, and the rotation angle of the brush head assembly is between -38° and 38°.

[0019] Furthermore, the magnetic adsorption strength of the output end is set between 3.5N-35N.

[0020] Furthermore, the shortest distance from the center point of the guide rod to the central axis of the input end is 1.5-4.5 mm.

[0021] Implementing the embodiments of this application will have the following beneficial effects:

[0022] The electric oral cleaning tool provided herein features an integrally formed transmission rod that reciprocates longitudinally within a groove, driving the groove to move. Because the rotating shaft and a limiting structure constrain the movable disk, the movable disk can only rotate back and forth in the vertical plane, driving the functional components of the brush head assembly. The transmission mechanism transmits power to the movable disk via the transmission rod, resulting in a small number of components and minimal energy loss during transmission. Increased clearances between components have minimal impact on the overall transmission process, ensuring minimal noise and swing even with prolonged use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] in:

[0025] FIG1 is a side view of an embodiment of the electric oral cleaning tool proposed in this application;

[0026] FIG2 is a cross-sectional view of section AA in FIG1 ;

[0027] Figure 3 is an enlarged view of point B in Figure 2;

[0028] FIG4 is a cross-sectional view of another cross section of an embodiment of the electric oral cleaning tool proposed in the present application;

[0029] FIG5 is a schematic structural diagram of an embodiment of the electric oral cleaning tool proposed in this application without showing the housing;

[0030] FIG6 is a schematic diagram of an embodiment of the electric oral cleaning tool proposed in the present application in a working state without showing the housing;

[0031] FIG7 is a schematic diagram of the housing structure of another embodiment of the electric oral cleaning tool proposed in this application;

[0032] FIG8 is a schematic structural diagram of another embodiment of the electric oral cleaning tool proposed in the present application, not showing the housing;

[0033] FIG9 is a schematic structural diagram of yet another embodiment of the electric oral cleaning tool proposed in the present application, not showing the housing;

[0034] FIG10 is a schematic structural diagram of an embodiment of the electric oral cleaning tool proposed in this application.

[0035] Reference numerals:

[0036] 1. Housing; 12. Limiting groove; 13. Guide ring;

[0037] 2. Transmission rod; 21. Guide rod; 211. Connecting block; 22. Connecting hole;

[0038] 3. Brush head assembly; 31. Functional element; 32. Movable disk; 321. Groove; 322. Accommodating slot; 33. Limiting structure; 34. Rotating shaft; 35. Fixing rod. DETAILED DESCRIPTION

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0040] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0042] 1 to 6 , the present application provides an electric oral cleaning tool, comprising a housing 1 , a transmission rod 2 , and a brush head assembly 3 ;

[0043] The brush head assembly 3 is rotatably connected to one end of the housing 1. A functional element 31 is provided on one side of the brush head assembly 3. The functional element 31 can include multiple groups of bristles as shown in FIG1 , or it can be another component, such as a tongue cleaner or a soft gel cleaner. For example, the tongue cleaning brush head shown in FIG10 can be used as a tongue cleaner. Specifically, a movable disk 32 is provided on the other side of the brush head assembly 3. The movable disk 32 has a mating area, which is arranged offset from the center of the brush head assembly 3. The transmission rod 2 is arranged in the housing 1. The transmission rod 2 has an input end and an output end. The input end of the transmission rod 2 is used to connect to the transmission structure and is cylindrical or approximately cylindrical, such as an elliptical cylinder. The input end extends into the cavity of the housing, and at least the input end is integrally formed. The output end of the transmission rod 2 is the end close to the brush head assembly 3, that is, it includes a guide rod 21 or a connecting hole 22 adapted to the matching area, and a connecting rod connecting the guide rod 21 or the connecting hole 22 to the input end. The shortest distance from the center point of the guide rod 21 to the central axis of the input end is 1.5-4.5 mm, and the distance between the guide rod and the center of the brush head assembly is between 2 mm and 4 mm. In addition, the output end and the input end can be integrally formed in a bent manner, and on this basis, the connecting block 211 can be connected to the output end by welding or riveting. It is worth mentioning that the output end is eccentrically arranged relative to the input end in the axial direction of the transmission rod 2, and the input end is used to connect to the transmission structure. The output end cooperates with the matching area. When the output end makes a reciprocating motion of a variable diameter relative to the center of the movable disk, it drives the matching area and the brush head assembly 3 to reciprocate together. The above-mentioned variable diameter means that the distance between the output end and the center of the movable disk 32 is variable during the reciprocating motion. The output end of the transmission rod 2 is adaptively connected to the matching area. When the output end reciprocates longitudinally, it drives the matching area and the brush head assembly 3 to rotate together. When the housing 1 is plugged into the toothbrush handle, the top of the transmission structure provided in the toothbrush handle is connected to the transmission rod 2 by magnetic attraction, and drives the transmission rod 2 to reciprocate in the longitudinal direction. The transmission structure can be an existing structure and will not be described here. The trajectory of the movement of the transmission rod 2 is perpendicular to the horizontal line, so that the output end makes a variable distance motion relative to the center of the movable disk, that is, during the movement, the distance from the output end to the center of the movable disk is constantly changing. The lower end of the transmission rod 2 is close to the transmission structure and is axially symmetrical with the longitudinal center axis of the brush head assembly 3. The upper end of the transmission rod 2 gradually deviates to one side. In this embodiment, the matching area is an elliptical groove 321. The upper end of the transmission rod 2 is provided with a guide rod 21, that is, one side projection of the transmission rod 2 is similar to a "7" shape. The guide rod 21 is located in the groove 321. When the guide rod 21 moves back and forth longitudinally with the transmission rod 2, the guide rod 21 will drive the groove 321 to rotate.The elliptical groove 321 can leave sufficient space for the guide rod 21 to move. The longitudinal movement of the guide rod 21 drives the groove 321 to rotate around the center point of the brush head assembly 3, and the brush head assembly 3 rotates along with the groove 321. The rotation direction is shown by the arrow in Figure 6. Taking the direction shown in Figure 6 as an example, when the transmission rod 2 moves upward, the brush head assembly 3 rotates to the right, and when the transmission rod 2 moves downward, the brush head assembly 3 rotates to the left. The transmission structure drives the transmission rod 2 to move up and down at a high frequency, and the brush head assembly 3 also rotates left and right at a high speed, driving the functional element 31 on the other side of the brush head assembly 3 to rotate at a high speed. Taking a toothbrush as an example, it can achieve teeth cleaning. In addition, the brush head assembly 3 can be rotatably connected to one end of the housing 1. Specifically, a rotating shaft 34 can be inserted into the movable disk 32. The rotating shaft 34 is arranged at the center of the brush head assembly 3, and one end of the rotating shaft 34 abuts the housing 1. The rotating shaft 34 is fixed to the interior of the movable disk 32 by assembly. The movable disk 32 drives the brush head assembly 3 to rotate around the rotating shaft 34. A limiting structure 33 is provided on the movable disk 32, which is used to axially limit the brush head assembly 3. As shown in Figure 4, the movable disk 32 is provided with a longitudinally open receiving groove 322, and the housing 1 is provided with a longitudinal through-hole. The limiting structure 33 is inserted into the receiving groove 322 through the through-hole and abuts against the sidewall of the receiving groove 322. The receiving groove 322 can rotate relative to the limiting structure 33. The rotating shaft 34 prevents the movable disk 32 from moving horizontally or vertically, while the limiting structure 33 prevents the movable disk 32 from moving along the direction of the rotating shaft 34. The movable disk 32 can only rotate circumferentially. In this embodiment, the limiting structure 33 is a limiting pin.

[0044] In another embodiment, as shown in Figure 9, the matching area is a fixed rod 35 arranged on the movable disk. The fixed rod 35 is eccentrically arranged, and a connecting hole 22 is provided at the output end. The fixed rod 35 is located in the connecting hole 22, and the connecting hole 22 is also elliptical. When the connecting hole 22 moves longitudinally, the fixed rod 35 moves laterally in the connecting hole 22. Its working principle is similar to that of the above embodiment and will not be repeated.

[0045] In this embodiment, the orthographic projection of the movable disk 32 is composed of two arcs sharing a common chord. The distance between the center point of the groove 321 and the center point of the brush head assembly 3 is equal to the distance between the center point of the brush head assembly 3 and the other side edge of the movable disk 32. The former distance can also be slightly greater than the latter distance. The greater the former distance, the upward force exerted on the side wall of the groove 321 when the guide rod 21 moves upward. The longer the torque of this force, the smaller the force required to drive the movable disk 32 to rotate, and the more labor-saving it is. At the same time, considering the size of the housing 1 and the stability of the transmission, it is preferably equal to the latter distance.

[0046] In another embodiment, as shown in Figures 7 and 8, a connecting block 211 extends from the end of the guide rod 21 away from the brush head assembly 3. A limiting groove 12 is provided on the inner side of the housing 1. The connecting block 211 is located in the limiting groove 12 and can move longitudinally within the limiting groove 12. The limiting groove 12 restricts the connecting block 211, making it difficult for the transmission rod 2 to shake, so that the distance from the rotating shaft 34 to the vertical line on which the motion trajectory of the guide rod 21 is located is always fixed. During this process, the distance between the guide rod 21 and the rotating shaft 34 is a variable distance, and the maximum longitudinal motion stroke of the transmission rod 2 is 1-5 mm. Preferably, the maximum motion stroke is 1.5 mm-3.5 mm. At this time, the rotation angle of the brush head assembly 3 is between -38° and 38°, which can fully clean the teeth.

[0047] In addition, a guide ring 13 is fixed to the inner wall of the housing 1, and the transmission rod 2 passes through the guide ring 13 and can move back and forth longitudinally within the guide ring 13. The guide ring 13 guides and limits the transmission rod 2, so that the transmission rod 2 does not deviate during movement. In this embodiment, symmetrical clamping blocks are provided on the outer wall of the guide ring 13, and symmetrical clamping grooves are provided at corresponding positions on the inner wall of the housing 1. The clamping blocks are adapted to the clamping grooves. After clamping, the position of the guide ring 13 is fixed and will not move with the movement of the transmission rod 2. The inner diameter of the guide ring 13 is consistent with the outer diameter of the input end of the transmission rod 2, resulting in less friction and less loss during transmission. At the same time, it can also prevent the transmission rod 2 from deflecting and affecting its use.

[0048] In this embodiment, the transmission rod 2 is integrally formed. The end of the transmission rod 2 facing away from the brush head assembly 3 has a horizontal end surface, compatible with common transmission structures. At least the input end of the transmission rod 2 is made of a magnetizable metal material. In another embodiment, at least the input end of the transmission rod 2 is made of a plastic material mixed with magnetic powder. In other words, the input end of the transmission rod 2 can be connected and secured to the output end of the transmission structure through magnetic attraction.

[0049] Obviously, the embodiments described above are only some of the embodiments of the present application, rather than all of the embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present application specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present application.

Claims

1. An electric oral cleaning tool, characterized in that: It includes a housing, a transmission rod and a brush head assembly; The brush head assembly is rotatably connected to one end of the housing, a functional element is provided on one side of the brush head assembly, a movable disk is provided on the other side of the brush head assembly, a matching area is provided on the movable disk, and the matching area is arranged away from the center of the brush head assembly; The transmission rod is arranged in the housing, and the transmission rod has an input end and an output end, and the output end is eccentrically arranged relative to the input end in the axial direction of the transmission rod, and the input end is used to connect with the transmission structure, and the output end cooperates with the matching area. When the output end performs a reciprocating motion with a variable diameter relative to the center of the movable disk, the matching area and the brush head assembly are driven to reciprocate together; the variable diameter means that the distance from the output end to the center of the movable disk is variable during the reciprocating motion; The transmission rod or at least the input end is integrally formed; The transmission rod or at least the input end is made of a magnetizable material.

2. The electric oral cleaning tool according to claim 1, characterized in that: The matching area is a groove, and the output end is provided with a guide rod, and the guide rod is located in the groove. The distance between the guide rod and the center of the brush head assembly is between 2 mm and 4 mm.

3. The electric oral cleaning tool according to claim 2, characterized in that: A connecting block is extended from one end of the guide rod away from the brush head assembly, a limiting groove is arranged on the inner side of the shell, and the connecting block is located in the limiting groove and can move longitudinally in the limiting groove.

4. The electric oral cleaning tool according to claim 1, characterized in that: The matching area is a fixing rod, the output end is provided with a connecting hole, the fixing rod is located in the connecting hole, and when the connecting hole moves longitudinally, the fixing rod moves transversely in the connecting hole.

5. The electric oral cleaning tool according to claim 1, characterized in that: The output end is connected to the input end by bending, welding or assembly, and the output end is projected in an "L" shape, a "T" shape or a groove shape.

6. The electric oral cleaning tool according to claim 1, characterized in that: The transmission rod or at least the input end is made of plastic material mixed with magnetic powder.

7. The electric oral cleaning tool according to claim 1, characterized in that: A guide ring is fixed on the inner side wall of the shell, and the transmission rod passes through the guide ring and can reciprocate longitudinally in the guide ring.

8. The electric oral cleaning tool according to claim 1, characterized in that: The maximum reciprocating travel of the transmission rod in the longitudinal direction is 1-5 mm, and the rotation angle of the brush head assembly is between -38° and 38°.

9. The electric oral cleaning tool according to claim 1, characterized in that: The magnetic adsorption strength of the output end is set between 3.5N-35N.

10. The electric oral cleaning tool according to claim 2, characterized in that: The shortest distance from the center point of the guide rod to the center axis of the input end is 1.5-4.5 mm.

11. An electric oral cleaning tool, characterized in that: It includes a housing, a transmission rod and a brush head assembly; The brush head assembly is rotatably connected to one end of the housing, a functional element is provided on one side of the brush head assembly, a movable disk is provided on the other side of the brush head assembly, a matching area is provided on the movable disk, and the matching area is arranged away from the center of the brush head assembly; The transmission rod is arranged in the housing, and the transmission rod has an input end and an output end, and the output end is eccentrically arranged relative to the input end in the axial direction of the transmission rod, the input end is used to connect with the transmission structure, and the output end cooperates with the matching area, and the output end drives the matching area and the brush head assembly to reciprocate; The transmission rod or at least the input end is integrally formed; The transmission rod or at least the input end is made of a magnetizable material.

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