Brush head and electric toothbrush

Abstract

This utility model discloses a brush head and an electric toothbrush, relating to the field of toothbrush technology. The brush head includes: a handle, hollow inside; a brush disc having a connecting part and a cleaning part, the connecting part extending into and rotatably connected to the handle, and the cleaning part abutting against the cleaning area; a transmission rod rotatably disposed within the handle, its rotation axis perpendicular to the rotation axis of the brush disc; and a transmission structure connecting the brush disc and the transmission rod, the transmission structure including: a connecting groove on the connecting part facing the transmission rod, offset from the rotation axis of the brush disc; a driving part on the transmission rod near the connecting groove, offset from the rotation axis of the transmission rod, and placed within the connecting groove; and a beveled surface on at least one side of the connecting groove along the rotation direction of the brush disc, the beveled surface avoiding the driving part. The technical solution provided by this utility model improves the cleaning effect and user experience of the toothbrush.

Description

Technical Field

[0001] This utility model relates to the field of toothbrush technology, and in particular to a brush head and an electric toothbrush. Background Technology

[0002] Common electric toothbrushes mainly consist of a handle and a brush head. The brush head has bristles at the end, which clean the teeth through their own movement during operation. However, most electric toothbrushes in this field use a vibration-based motion for the brush head. This method often results in insufficient cleaning of the teeth's interior, leading to unsatisfactory overall cleaning and failing to fully meet users' high demands for oral hygiene. Utility Model Content

[0003] The main purpose of this utility model is to provide a brush head and an electric toothbrush, which aims to improve cleaning effect and user experience.

[0004] To achieve the above objectives, this utility model proposes a brush head comprising:

[0005] The brush handle is hollow inside.

[0006] A brush disc has a connecting part and a cleaning part. The connecting part extends into the brush handle and is rotatably connected to the brush handle. The cleaning part is used to abut against the part to be cleaned.

[0007] A transmission rod is rotatably disposed inside the brush handle, and the rotation axis of the transmission rod is perpendicular to the rotation axis of the brush disc;

[0008] A transmission structure is provided, which connects the brush disc and the transmission rod. The transmission structure includes:

[0009] A connecting groove is provided on the connecting part on the side facing the transmission rod, and the connecting groove is offset from the rotation axis of the brush disk;

[0010] A drive unit is provided on one end of the transmission rod near the connecting groove. The transmission rod is offset from the rotation axis of the transmission rod, and the drive unit is placed inside the connecting groove.

[0011] The beveled portion is provided on the periphery of at least one side of the connecting groove along the rotation direction of the brush disk, and the beveled portion is used to avoid the drive unit.

[0012] In one embodiment, a limiting groove is provided on the side of the connecting part, the limiting groove extends along the rotation direction of the connecting part, and a first limiting part is provided on the inner wall of the brush handle, the first limiting part slidingly engaging with the limiting groove.

[0013] In one embodiment, one end of the limiting groove along its own extending direction is connected to the connecting groove.

[0014] In one embodiment, two connecting slots are provided, and the two connecting slots are located on both sides of the rotation axis of the brush disk.

[0015] In one embodiment, two limiting grooves are provided, and the two limiting grooves are centrally symmetrical about the rotation axis of the brush disk. A first limiting part is slidably disposed in each limiting groove.

[0016] In one embodiment, an opening is provided at one end of the brush handle away from the brush disc, and the transmission rod is inserted into the brush handle through the opening. The brush head also includes a limiting ring, which is disposed at the opening to limit the transmission rod.

[0017] In one embodiment, a second limiting portion is provided on one end of the limiting ring near the transmission rod, the second limiting portion extending around the transmission rod, and a third limiting portion is provided on the side of the transmission rod near one end of the limiting ring, the third limiting portion cooperating with the second limiting portion to limit the rotation angle of the transmission rod.

[0018] In one embodiment, a limiting shaft protrudes from the brush handle, and the brush disc is rotatably sleeved on the limiting shaft. A connecting hole is provided on the outer wall of the limiting shaft, and the connecting hole is coaxial with the rotation axis of the transmission rod. A connecting part protrudes from one end of the transmission rod near the limiting shaft, and the connecting part is rotatably engaged with the connecting hole.

[0019] In one embodiment, the center of the cleaning section is offset from the rotation axis of the brush disk.

[0020] This utility model also proposes an electric toothbrush, comprising:

[0021] handle;

[0022] A drive assembly is located on the handle;

[0023] The brush head is connected to the drive assembly and is the brush head described above.

[0024] In this invention, the transmission rod rotates within the brush handle, with its rotation axis extending along the length of the brush handle. The brush disc is rotatably mounted at one end of the brush handle, and has a connecting part and a cleaning part. The connecting part is rotatably connected to the brush handle, and the cleaning part is used to contact the teeth. Furthermore, a connecting groove is provided on the connecting rod, and a driving part is provided on the transmission rod. When the transmission rod rotates, the driving part oscillates around the rotation axis of the transmission rod, driving the brush disc to rotate via the connecting groove. When the brush disc rotates, the cleaning part can clean the teeth by rotating, which, compared to vibration, effectively increases the brushing amplitude and improves the cleaning effect. Additionally, a beveled surface is provided on at least one side of the connecting groove along the rotation direction. This beveled surface can avoid the driving part during oscillation, making the brush disc rotate more smoothly and increasing the range of rotation, further enhancing the cleaning effect. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the structure of the brush head provided by this utility model;

[0027] Figure 2 A cross-sectional schematic diagram of the brush head provided by this utility model;

[0028] Figure 3 A schematic diagram of the structure of the brush head and the transmission rod in this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the brush disk in the brush head provided by this utility model;

[0030] Figure 5 This is a schematic diagram of the transmission rod in the brush head provided by this utility model;

[0031] Figure 6 This is a schematic diagram of the brush handle in the brush head provided by this utility model.

[0032] Explanation of icon numbers:

[0033] 100, Brush handle; 110, First limiting part; 120, Limiting shaft; 130, Connecting hole; 200, Brush disc; 210, Connecting part; 211, Limiting groove; 220, Cleaning part; 300, Transmission rod; 310, Third limiting part; 320, Support part; 400, Transmission structure; 410, Connecting groove; 420, Drive part; 430, Angled part; 500, Limiting ring; 510, Second limiting part.

[0034] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0036] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] To improve the cleaning effect of electric toothbrushes, this technical solution proposes a brush head, including:

[0039] The brush handle 100 has a hollow interior.

[0040] The brush plate 200 has a connecting part 210 and a cleaning part 220. The connecting part 210 extends into the brush handle 100 and is rotatably connected to the brush handle 100. The cleaning part 220 is used to abut against the receiving cleaning part 220 position.

[0041] The transmission rod 300 is rotatably mounted inside the brush handle 100, and the rotation axis of the transmission rod 300 is perpendicular to the rotation axis of the brush disc 200.

[0042] Transmission structure 400, which connects brush disc 200 and transmission rod 300, includes:

[0043] A connecting groove 410 is provided on the connecting part 210 on the side facing the transmission rod 300, and the connecting groove 410 is offset from the rotation axis of the brush plate 200.

[0044] The drive unit 420 is provided on one end of the transmission rod 300 near the connecting groove 410. The transmission rod 300 is offset from the axis of rotation of the transmission rod 300, and the drive unit 420 is placed in the connecting groove 410.

[0045] The inclined portion 430 is provided on the periphery of at least one side of the connecting groove 410 along the rotation direction of the brush disk 200, and the inclined portion 430 is used to avoid the drive unit 420.

[0046] In the technical solution of this utility model, the transmission rod 300 rotates within the brush handle 100, with the rotation axis extending along the length of the brush handle 100. The brush disc 200 is rotatably disposed at one end of the brush handle 100. The brush disc 200 has a connecting part 210 and a cleaning part 220. The connecting part 210 is rotatably connected to the brush handle 100, and the cleaning part 220 is used to abut against the teeth. Furthermore, a connecting groove 410 is provided on the connecting part, and a driving part 420 is provided on the transmission rod 300. When the transmission rod 300 rotates, the driving part 420 oscillates around the rotation axis of the transmission rod 300. The connecting groove 410 drives the brush plate 200 to rotate, thereby driving the brush plate 200. When the brush plate 200 rotates, the cleaning part 220 can clean the teeth by rotating. Compared with the method of vibration, this is equivalent to increasing the brushing range and improving the cleaning effect. In addition, a beveled surface 430 is provided on the periphery of at least one side of the connecting groove 410 along the rotation direction. The beveled surface 430 can avoid the driving part 420 when swinging, making the rotation of the brush plate 200 smoother and increasing the range of rotation of the brush plate 200, which is also conducive to further improving the cleaning effect.

[0047] like Figures 1 to 6Specifically, this brush head can be applied to an electric toothbrush. The brush head includes a handle 100, which is used to connect to the handle of the electric toothbrush. The handle 100 is cylindrical and has a cavity extending along its length. An opening is provided on the side of one end of the handle 100 for mounting the bristles. A transmission rod 300 is provided inside the handle 100, extending along the length of the handle 100. The transmission rod 300 is rotatably connected to the handle 100 via a pin, and the axis of rotation of the transmission rod 300 extends along the length of the handle 100. A brush disc 200 is provided at the opening. The brush disc 200 includes a connecting part 210 and a cleaning part 220. The connecting part 210 has a disc-shaped structure and can be embedded in... The opening can be rotatably connected to the brush handle 100 via bearings, etc. The rotation axis of the connecting part 210 is along the radial direction of the brush handle 100, that is, the rotation axis of the brush disc 200 is perpendicular to the rotation axis of the transmission rod 300. A cleaning part 220 is provided on the side of the connecting part 210 away from the brush handle 100. The cleaning part 220 can be bristles or silicone protrusions. When the cleaning part 220 is bristles, it can clean the teeth. When the cleaning part 220 is silicone protrusions, it can polish the teeth. In addition, the transmission rod 300 and the brush disc 200 are connected through the transmission structure 400. A connecting groove 410 is provided on the side of the connecting part 210 of the brush disc 200 facing the transmission rod 300. The connecting groove 410 is U-shaped, and its center is offset from the rotation axis of the brush disc 200 by a certain distance. A drive unit 420 is provided at one end of the transmission rod 300 near the connecting groove 410. The drive unit 420 can be a spherical protrusion with its center offset from the rotation axis of the transmission rod 300, allowing the drive unit 420 to oscillate around the rotation axis of the transmission rod 300 when the transmission rod 300 rotates. When the drive unit 420 is placed in the connecting groove 410, the rotation of the transmission rod 300 will drive the drive unit 420 to move within the connecting groove 410, thereby driving the brush plate 200 to rotate. When the brush head is installed on the handle of the electric toothbrush, the transmission rod 300 can be connected to the motor in the handle. The motor drives the transmission rod 300 to oscillate back and forth, thereby driving the brush plate 200 to rotate back and forth. Compared with the cleaning method of traditional electric toothbrushes, the brush plate 200 of this solution has a larger range of motion, thereby further enhancing the cleaning effect of the cleaning part 220 of the brush plate 200 on the teeth and improving the overall cleaning performance.In addition, in this design, a beveled surface 430 is provided on one of the two peripheries of the connecting groove 410 along the rotation direction of the brush disk 200. The beveled surface 430 is a smooth transition surface that gradually slopes from the edge of the connecting groove 410 to the bottom of the groove. When the drive unit 420 swings away from the beveled surface 430, the beveled surface 430 rotates towards the drive unit 420. The beveled surface 430 can provide clearance space for the drive unit 420, avoiding friction between the drive unit 420 and the edge of the connecting groove 410, making the brush disk 200 rotate more smoothly. The presence of the beveled surface 430 also makes the brush disk 200 interact more smoothly with the transmission rod 300. Before interference, the brush plate 200 has a larger swing amplitude, which further enhances the cleaning effect of the cleaning part 220 on the teeth and improves the overall cleaning performance. In this solution, the inclined part 430 can be set only on one side of the rotation direction of the connecting groove 410, so as to ensure the limiting of the driving part 420 by the connecting groove 410, reduce the activity gap between the driving part 420 and the brush plate 200, and improve stability. Of course, the inclined part 430 can also be set on both sides of the rotation direction of the connecting groove 410 to maximize the swing amplitude of the brush plate 200. The above two solutions can be flexibly set according to the needs and are not limited here.

[0048] like Figure 2 , Figure 4 and Figure 6 In one embodiment of the present invention, a limiting groove 211 is provided on the side of the connecting part 210, the limiting groove 211 extends along the rotation direction of the connecting part 210, and a first limiting part 110 is provided on the inner wall of the brush handle 100, the first limiting part 110 and the limiting groove 211 slide in cooperation. The connecting part 210 of the brush head is provided with a limiting groove 211 on its side. The limiting groove 211 is elongated and extends along the rotation direction of the connecting part 210, that is, it is arranged in an arc along the circumference of the connecting part 210. The inner wall of the brush handle 100 is provided with a first limiting part 110 at a corresponding position. The first limiting part 110 can be a protruding structure, the shape of which is adapted to the shape of the limiting groove 211. When the brush disc 200 rotates under the drive of the transmission rod 300, the connecting part 210 rotates accordingly, and the limiting groove 211 slides relative to the first limiting part 110. This can limit the rotation direction of the brush disc 200 and prevent the brush disc 200 from excessively deviating or shaking during rotation, thereby ensuring that the rotation of the brush disc 200 is more stable and controllable, and enhancing the user experience.

[0049] like Figure 4As shown, in one embodiment of this utility model, one end of the limiting groove 211 along its own extension direction is connected to the connecting groove 410. The purpose of this design is to facilitate the assembly and disassembly of the brush disc 200. During assembly, the connecting part 210 of the brush disc 200 is inserted into the opening of the brush handle 100. At this time, the first limiting part 110 is aligned with the connecting groove 410. The first limiting part 110 is accommodated in the connecting groove 410. After the brush disc 200 is assembled in place along its axial direction, the brush disc 200 can be rotated so that the first limiting part 110 can slide into the limiting groove 211 along the position where the limiting groove 211 and the connecting groove 410 communicate. At this time, the limiting groove 211 and the first limiting part 110 are engaged. After that, the subsequent assembly of other components such as the transmission rod 300 can be carried out. When disassembly is required, the above operation can be reversed. Through this design, while ensuring the connection stability between the brush disc 200 and the brush handle 100, the ease of assembly and disassembly of the brush disc 200 is improved, which helps to enhance the user experience and makes the replacement and maintenance of the brush head simpler and faster.

[0050] like Figure 4 As shown, in one embodiment of this utility model, two connecting slots 410 are provided, located on both sides of the rotation axis of the brush disk 200. The two connecting slots 410 can have the same shape and size, and are symmetrically arranged about the central axis of the brush disk 200. Because two connecting slots 410 are provided, either connecting slot 410 can be engaged with the drive unit 420 on the transmission rod 300 during assembly, providing greater flexibility in assembly. Furthermore, the design of two connecting slots 410 increases the service life of the brush disk 200. During use, if one connecting slot 410 wears out due to long-term use, it can be switched to the other connecting slot 410, thereby extending the service life of the brush disk 200 and reducing the user's replacement costs.

[0051] like Figure 4 In one embodiment of this utility model, two limiting grooves 211 are provided. The two limiting grooves 211 are centrally symmetrical about the rotation axis of the brush disk 200. A first limiting part 110 is slidably disposed in each limiting groove 211. This arrangement is equivalent to two sets of limiting grooves 211 cooperating with the first limiting part 110, which improves the connection reliability between the brush disk 200 and the brush handle 100, and further improves the stability of the brush disk 200 when rotating. In addition, since the two limiting grooves 211 are centrally symmetrically disposed, each limiting groove 211 is connected to a different connecting groove 410. During assembly, the user can put any first limiting part 110 into any connecting groove 410 and rotate to complete the assembly, which further improves the convenience of assembly.

[0052] like Figure 3In one embodiment of this utility model, an opening is provided at the end of the brush handle 100 away from the brush disc 200. The transmission rod 300 is inserted into the brush handle 100 through the opening. The brush head also includes a limiting ring 500, which is disposed at the opening to limit the transmission rod 300. The opening at the end of the brush handle 100 away from the brush disc 200, after the transmission rod 300 is inserted into the opening, the limiting ring 500 is embedded in the opening and locked in place by engaging with the periphery of the opening. This design limits the transmission rod 300 within the brush handle 100, ensuring the stability of the transmission rod 300's position while facilitating assembly. Furthermore, the limiting ring 500 is hollow, allowing the output shaft on the electric toothbrush handle to pass through and connect to the transmission rod 300.

[0053] like Figure 3 and Figure 5 In one embodiment of this utility model, a second limiting part 510 is provided on the end of the limiting ring 500 near the transmission rod 300. The second limiting part 510 extends around the transmission rod 300. A third limiting part 310 is provided on the side of the transmission rod 300 near the end of the limiting ring 500. The third limiting part 310 cooperates with the second limiting part 510 to limit the rotation angle of the transmission rod 300. The second limiting part 510 is a protrusion on the limiting ring 500, located at the end of the limiting ring 500 facing the transmission rod 300, and extends in an arc around the transmission rod 300. The third limiting part 310 is a protrusion on the outer peripheral wall of the transmission rod 300. When the transmission rod 300 rotates, the second limiting part 510 can limit the rotation angle of the third limiting part 310, preventing excessive rotation of the transmission rod 300 and improving the stability and reliability of the brush head.

[0054] like Figure 2 and Figure 6To further improve the stability of the brush disc 200 during rotation, in one embodiment of this utility model, a limiting shaft 120 is protruding inside the brush handle 100, and the brush disc 200 is rotatably sleeved on the limiting shaft 120. A connecting hole 130 is provided on the outer wall of the limiting shaft 120. The connecting hole 130 is coaxial with the rotation axis of the transmission rod 300. A connecting part 210 is protruding at one end of the transmission rod 300 near the limiting shaft 120, and the connecting part 210 is rotatably engaged with the connecting hole 130. The limiting shaft 120 protrudes from the inner wall of the brush handle 100 and extends toward the opening. The limiting shaft 120 is coaxially arranged with the brush disk 200. A hole is provided on the connecting part 210 of the brush disk 200 to cooperate with the limiting shaft 120. The limiting shaft 120 is inserted into the hole and slides with the hole to form a limiting position, which can prevent the brush disk 200 from shaking when rotating, thus improving the user experience. In addition, a protruding support part 320 can be provided on the end of the transmission rod 300 near the limiting shaft 120. A support hole is provided on the outer side of the limiting shaft 120. The support part 320 can be inserted into the support hole. The transmission rod 300 can rotate around the support part 320. This not only facilitates the assembly of the transmission rod 300, but also improves the cooperation accuracy between the transmission rod 300 and the brush disk 200 by ensuring that both the transmission rod 300 and the brush disk 200 cooperate with the limiting shaft 120, thereby improving the stability and reliability of the rotation of the brush disk 200.

[0055] In one embodiment of this utility model, the center of the cleaning part 220 is offset from the rotation axis of the brush disk 200. When the brush disk 200 rotates, the cleaning part 220 swings around the center of the brush disk 200, which can increase the cleaning range of the cleaning part 220 and further improve the cleaning effect.

[0056] This utility model also proposes an electric toothbrush, which includes a handle and a drive component inside the handle. The drive component can be a motor or other device. The drive component is connected to the brush head and drives the brush head to move. The specific structure of the brush head is as described in the above embodiments. Since this electric toothbrush adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0057] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A brush head, characterized in that, include: The brush handle is hollow inside. A brush disc has a connecting part and a cleaning part. The connecting part extends into the brush handle and is rotatably connected to the brush handle. The cleaning part is used to abut against the part to be cleaned. A transmission rod is rotatably disposed inside the brush handle, and the rotation axis of the transmission rod is perpendicular to the rotation axis of the brush disc; A transmission structure is provided, which connects the brush disc and the transmission rod. The transmission structure includes: A connecting groove is provided on the connecting part on the side facing the transmission rod, and the connecting groove is offset from the rotation axis of the brush disk; A drive unit is provided on one end of the transmission rod near the connecting groove. The transmission rod is offset from the rotation axis of the transmission rod, and the drive unit is placed inside the connecting groove. The beveled portion is provided on the periphery of at least one side of the connecting groove along the rotation direction of the brush disk, and the beveled portion is used to avoid the drive unit.

2. The brush head as described in claim 1, characterized in that, A limiting groove is provided on the side of the connecting part, the limiting groove extends along the rotation direction of the connecting part, and a first limiting part is provided on the inner wall of the brush handle, the first limiting part slidingly engaging with the limiting groove.

3. The brush head as described in claim 2, characterized in that, One end of the limiting groove along its own extension direction is connected to the connecting groove.

4. The brush head as described in claim 3, characterized in that, The connecting groove is provided in two places, and the two connecting grooves are located on both sides of the rotation axis of the brush disk.

5. The brush head as described in claim 4, characterized in that, The limiting groove is provided in two places, and the two limiting grooves are centrally symmetrical about the rotation axis of the brush disk. A first limiting part is slidably disposed in each limiting groove.

6. The brush head as described in claim 1, characterized in that, An opening is provided at one end of the brush handle away from the brush disc. The transmission rod is inserted into the brush handle through the opening. The brush head also includes a limiting ring, which is located at the opening to limit the transmission rod.

7. The brush head as described in claim 6, characterized in that, A second limiting part is provided on one end of the limiting ring near the transmission rod, and the second limiting part extends around the transmission rod. A third limiting part is provided on the side of the transmission rod near one end of the limiting ring. The third limiting part cooperates with the second limiting part to limit the rotation angle of the transmission rod.

8. The brush head as described in claim 1, characterized in that, The brush handle has a protruding limiting shaft, and the brush disc is rotatably sleeved on the limiting shaft. The outer wall of the limiting shaft has a connecting hole, which is coaxial with the rotation axis of the transmission rod. The transmission rod has a protruding connecting part at one end near the limiting shaft, and the connecting part is rotatably engaged with the connecting hole.

9. The brush head as described in claim 1, characterized in that, The center of the cleaning section is offset from the rotation axis of the brush disc.

10. An electric toothbrush, characterized in that, include: handle; A drive assembly is located on the handle; A brush head, which is connected to the drive assembly, wherein the brush head is the brush head according to any one of claims 1 to 9.

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