An electric toothbrush head
By cooperating with the guide protrusions and guide grooves, the bristle blocks can move up, down, left, and right, solving the problems of poor cleaning effect and insufficient stability of existing electric toothbrush heads, and improving the cleaning ability and safety of toothbrush heads.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGBO AOLBEA ORAL CARE PRODS
- Filing Date
- 2023-07-11
- Publication Date
- 2026-05-22
AI Technical Summary
Existing electric toothbrush heads with bristle implants can only swing left and right due to the rivet restriction, resulting in poor cleaning effect. Furthermore, the exposed rivets are prone to loosening and entering the mouth, posing a danger.
By cooperating with the guide protrusions and guide grooves, the bristle block can swing left and right while moving up and down. Combined with the limitation of the drive shaft and the swing groove, the stability and cleaning effect of the bristle block are ensured.
It improves the cleaning effect of the toothbrush head, allowing the bristle implants to better reach into the gaps between teeth to remove residue, while ensuring the stability and reliability of the movement.
Smart Images
Figure CN116712201B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of toothbrush technology, and in particular to an electric toothbrush head. Background Technology
[0002] An electric toothbrush, invented by Philippe-Guy Woog, uses a motor to rapidly rotate or vibrate, causing the brush head to vibrate at high frequency. This instantly breaks down toothpaste into fine foam, deeply cleaning between teeth. At the same time, the vibration of the bristles promotes blood circulation in the mouth and massages the gum tissue.
[0003] Existing electric toothbrushes generally include a handle and a brush head for use with the toothbrush. The brush head, for example... Figure 1 The brush includes a brush rod 100, a swing arm 200, and a bristle block 300 with bristles 310. The front end of the brush rod 100 has a receiving cavity 110 with a central shaft 140 inside. The bristle block 300 is installed in the receiving cavity 110 and has mating holes 330 that mate with the central shaft 140 to achieve left-right swinging. A rivet 500 is provided between the bristle block 300 and the receiving cavity 110 to prevent the bristle block from detaching. The brush rod 100 also has a mounting cavity 120 extending forward from its rear end and communicating with the receiving cavity 110. The swing arm 200 is installed in the mounting cavity 120 and connected to the bristle block 300 via a drive shaft 220. The linkage 00 allows the swing arm 200 to move under the drive of the drive device inside the electric toothbrush handle, causing the bristle block 300 to swing left and right along the central axis. However, the bristle block 300 in existing electric toothbrush heads can only swing left and right due to the restriction of the rivet 500. At the same time, the stability of the bristle block is poor due to the restriction of rotation between the rivet and the central axis, resulting in poor cleaning effect. It can generally only clean the surface of the teeth and is difficult to remove foreign objects between the teeth. Furthermore, the rivets of existing electric toothbrush heads are directly exposed on the outermost part without any protective parts. Once the rivet becomes loose, it will fall into the user's mouth, and may even cause the user to swallow the rivet, causing danger. There is room for improvement. Summary of the Invention
[0004] This invention aims to overcome the shortcomings of the prior art by providing an electric toothbrush head with a simple and reasonable structure. Through the cooperation of the guide protrusion and the guide groove, the bristle block can move up and down while swinging left and right. This allows for up-and-down brushing during brushing, while the up-and-down movement applies a gentle vertical impact force to the tooth surface, enabling the bristles to better penetrate into the gaps between teeth and dislodge residue, thus improving the cleaning effect of the toothbrush head. Furthermore, the bristle block can be easily inserted into the receiving cavity of the brush handle through the mounting slot, and the guide protrusion is engaged in the corresponding guide groove. Moreover, by limiting the position of the mounting slot in the receiving cavity and by cooperating with the swing slot through the drive shaft, the swing angle is limited to ensure that the guide protrusion moves within the guide groove, guaranteeing the reliability and stability of the bristle block's movement.
[0005] To achieve the above objectives, the present invention provides an electric toothbrush head for use with an electric toothbrush handle, comprising a brush rod, a swing arm, and a bristle-embedded block; wherein, the brush rod has a first central axis, and a receiving cavity is provided on the upper surface of the brush rod corresponding to its front end; the brush rod has a mounting cavity extending forward from its rear end along the first central axis and communicating with the receiving cavity; the bristle-embedded block is movably and limitly mounted in the receiving cavity of the brush rod, and the bristle-embedded block has a second central axis and is aligned by being parallel or collinear with the first central axis; the swing arm is mounted in the mounting cavity of the brush rod and is linked and connected with the bristle-embedded block;
[0006] The brush rod is provided with a vertically extending rotating shaft at the bottom center of the accommodating cavity, and the bottom of the bristle block is provided with a rotating hole that cooperates with the rotating shaft to achieve rotation around the shaft.
[0007] The hair implantation block has at least one guide protrusion on each side wall corresponding to the second central axis. The opening of the accommodating cavity has a mounting slot that corresponds one-to-one with the guide protrusion after the hair implantation block is deflected at least a first angle relative to the first central axis. The inner wall of the accommodating cavity also has a guide groove that corresponds one-to-one with the mounting slot and is connected to the guide protrusion for the guide protrusion to be embedded and slid to guide the hair implantation block to move up and down. The guide grooves on the accommodating cavity corresponding to the first central axis are arranged to extend in opposite directions.
[0008] The rear end of the hair-planting block is provided with a swing slot, and the front end of the swing rod is provided with a drive shaft that extends into the swing slot. The drive shaft drives the hair-planting block to swing left and right by contacting the inner walls of the opposite sides of the swing slot, and the maximum deflection angle of the single side driven by the swing rod to swing the hair-planting block is less than the first angle.
[0009] The setting is further configured such that the amplitude of the up-and-down movement of the hair-planting block along the guide groove is 0.1mm-2mm.
[0010] The further configuration is as follows: the front end of the swing arm is provided with a positioning shaft, and the brush rod is provided with a positioning hole that cooperates with the positioning shaft to realize the swing arm swinging left and right around the shaft.
[0011] The transmission shaft is further configured such that the front end of the transmission shaft is provided with a bent portion arranged in a bend and placed in a swing groove, and the bend portion contacts the corresponding inner walls on both sides of the swing groove to drive the hair-planting block to swing left and right.
[0012] The further configuration includes a fixing sleeve, which is fixedly installed in the rear end of the mounting cavity to limit and lock the swing arm within the mounting cavity.
[0013] The cross-sectional shape of the guide protrusion is further configured to be circular, elliptical, triangular, or trapezoidal.
[0014] Further configuration: the guide groove is spiral, ramp, or arc-shaped.
[0015] The guide protrusion is further configured to be integrally connected to the hair-planting block, or the guide protrusion is a separate component installed on the hair-planting block.
[0016] Compared with existing technologies, this invention has a simple and reasonable structure. Through the cooperation of the guide protrusion and the guide groove, the bristle block can swing left and right in the horizontal direction and move up and down in the vertical direction. In this way, the left and right swing of the bristle block can achieve up and down brushing during brushing, while the up and down movement of the bristle block can apply a vertical and gentle impact force to the tooth surface, allowing the bristles to better penetrate into the gaps between teeth and move in and out along the gaps to push out the residue in the gaps, thus improving the cleaning effect of the toothbrush head. At the same time, the bristle block can be easily installed into the receiving cavity of the brush handle through the mounting slot, and the guide protrusion can be locked into the corresponding guide groove. Furthermore, by limiting the position of the mounting slot on the receiving cavity and limiting the swing angle through the cooperation of the drive shaft and the swing slot, the movement of the guide protrusion within the guide groove is ensured, thus guaranteeing the reliability and stability of the bristle block movement. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the axial cross-sectional structure of an existing electric toothbrush head;
[0018] Figure 2 This is a schematic diagram of the axial cross-sectional structure of the electric toothbrush head of the present invention;
[0019] Figure 3 This is a schematic cross-sectional view of the electric toothbrush head corresponding to the bristle implantation block of the present invention.
[0020] Figure 4 This is a schematic diagram of the detachable structure of the electric toothbrush head of the present invention;
[0021] Figure 5 This is a schematic diagram of the planar structure corresponding to the installation of the tufted blocks;
[0022] Figure 6 This is a schematic diagram of the planar structure after the corresponding flocking blocks are installed in place;
[0023] Figure 7 This is a schematic diagram of the specific implementation structure of the pendulum. Figure 2 ;
[0024] Figure 8 This is a schematic diagram of the specific implementation structure of the pendulum. Figure 3 .
[0025] The following reference numerals are marked on the accompanying drawings:
[0026] 100. Brush rod; 110. Receiving cavity; 111. Mounting slot; 112. Guide groove; 120. Mounting cavity; 130. Rotating shaft; 140. Limiting rib; 141. Positioning hole; 200. Swing rod; 210. Positioning shaft; 220. Drive shaft; 221. Bending part; 300. Bristle block; 310. Face support; 311. Brush bristles; 320. Rotating base; 321. Guide protrusion; 322. Rotating hole; 323. Swinging slot; 400. Fixing sleeve; 500. Rivet; A. First central axis; B. Second central axis; C. First angle. Implementation
[0027] The following detailed description of a specific embodiment of the present invention is provided in conjunction with the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.
[0028] This invention provides an electric toothbrush head such as Figures 2 to 6 As shown, it is used in conjunction with an electric toothbrush handle, which provides the power required for the electric toothbrush head to operate. The electric toothbrush head includes a brush handle 100, a swing arm 200, a fixing sleeve 400, and a bristle implant 300 with bristles 311. The bristle implant 300 is correspondingly installed on the front end of the brush handle 100. The swing arm 200 is installed inside the brush handle 100, and the front end of the swing arm 200 is linked to the bristle implant 300. The fixing sleeve 400 is fixedly installed inside the brush handle 100 to lock and limit the swing arm 200 inside the brush handle 100 to prevent it from falling off. When the electric toothbrush head is used in conjunction with the electric toothbrush handle, the swing arm 200 can move under the drive of the drive device inside the electric toothbrush handle to drive the bristle implant 300 to swing left and right to achieve an automatic up and down brushing effect.
[0029] In this embodiment, specifically as follows: Figure 4As shown, the tufted block 300 includes a face support 310 with bristles 311 and a rotating base 320 fixedly connected to the lower surface of the face support 310. The tufted block 300 has a second central axis B. The rotating base 320 has guide protrusions 321 arranged oppositely on opposite side walls corresponding to the second central axis B. The guide protrusions 321 on both sides can be integrally connected to the rotating base 320 or can be separate components installed on the rotating base 320 later. The cross-sectional shape of the guide protrusions 321 can be circular, elliptical, triangular, or trapezoidal, etc. The rotating base 320 has a rotating hole 322 with a certain depth at the center of its bottom and a swing groove 323 on its rear end face to cooperate with the swing rod 200 to achieve linkage.
[0030] In this embodiment, specifically as follows: Figure 4 As shown, the swing arm 200 has a forward-extending drive shaft 220 at its front end. The front end of the drive shaft 220 has a bent portion 221 that extends into the swing slot 323 of the rotating base 320. The swing arm 200 swings under the action of the electric toothbrush handle's drive mechanism, causing the bent portion 221 of the drive shaft 220 to act on the opposite inner walls of the swing slot 323, thus causing the bristle implantation block 300 to swing left and right. The swing amplitude of the bristle implantation block 300 can be controlled by controlling the degree of bending of the bent portion 221 of the drive shaft 220. The specific structure of the drive shaft 220 (bent portion 221) in this patent is as follows: Figure 4 , Figure 7 and Figure 8 As shown, it can be a 7-shaped structure, a Y-shaped structure, or a T-shaped structure, as well as any other shape that can cause the flocking blocks to swing left and right.
[0031] In this embodiment, specifically as follows: Figures 3 to 6As shown, the brush handle 100 has a first central axis A arranged along its body. The brush handle 100 has a receiving cavity 110 at its front end for accommodating the rotating base 320 of the bristle implantation block 300. A vertically extending rotating shaft 130 is provided at the bottom of this receiving cavity for corresponding insertion into the rotating hole 322 of the rotating base 320. The rotating shaft 130, in cooperation with the rotating hole 322, enables the bristle implantation block 300 to rotate at a fixed point. Simultaneously, the receiving cavity 110 has mounting slots 111 corresponding to guide protrusions 321 at predetermined positions of its opening. These mounting slots 111 guide the rotating base 320 and its guide protrusions 321 from top to bottom into the receiving cavity 110. Furthermore, the inner wall of the receiving cavity 110 also has… A guide groove 112 is provided, which corresponds to and communicates with the mounting slot 111 and is used to cooperate with the guide protrusion 321 to guide the hair-planting block 300 to move left and right up and down. The guide groove 112 is preferably a spiral, ramp, or arc structure. The opening of the guide groove 112 is preferably connected to the bottom of the mounting slot 111 to facilitate the screwing in of the guide protrusion 321. The guide grooves 112 on both sides of the first central axis A extend in opposite directions, that is, the guide groove 112 on one side extends forward and upward from the starting position, while the guide groove on the other side extends backward and downward from the initial position, and vice versa. At the same time, the brush rod 100 is provided with a mounting cavity 120 along the first central axis A, which extends forward from the rear end and communicates with the receiving cavity 110 for mounting the swing rod 200.
[0032] During installation, the guide protrusion 321 of the bristle implant 300 is aligned with the mounting slot 111 of the receiving cavity 110. At this time, the second central axis B of the bristle implant 300 is arranged at a first angle C with the first central axis A of the brush rod 100, and the rotating hole 322 is directly opposite the rotating shaft 130 (e.g., Figure 5 As shown), this allows the rotating base 320 of the bristle implantation block 300 to be easily inserted into the receiving cavity 110; then, the bristle implantation block 300 is rotated so that the guide protrusion 321 enters the guide groove 112 and rotates to the initial position, that is, the second central axis B of the bristle implantation block 300 is collinear with or parallel to the first central axis A of the brush rod 100 (as shown). Figure 6 At this time, the swing slot 323 of the tufting block 300 is arranged to face backward; the swing rod 200 is inserted into the mounting cavity 120 from the rear end of the brush rod 100 and its drive shaft 220 extends into the swing slot 323 of the tufting block 300, which can achieve the effect of positioning and limiting constraint; thus, by controlling the swing rod 200 to drive the tufting block 300 to swing at a maximum unilateral angle less than the first angle C when the tufting block 300 is installed, it can be ensured that the guide protrusion 321 moves in the guide groove 112, thus ensuring the working stability of the tufting block 300.
[0033] In the above scheme, specifically as follows: Figure 2As shown, the swing arm 200 is installed in the mounting cavity 120 of the brush arm 100. The bottom wall of the mounting cavity 120 is provided with a limiting rib 140 that abuts against the front end of the swing arm 200. The drive shaft 220 is located above the limiting rib 140 and extends through the gap between the limiting rib 140 and the upper wall of the mounting cavity 120, and is linked to the bristle block 300 in the accommodating cavity 110. The front end of the swing arm 200 is provided with a positioning shaft 210 corresponding to the limiting rib 140. The limiting rib 140 is provided with a positioning hole 141 for the positioning shaft 210 to pass through. In this way, the swing arm 200 can rotate along the positioning shaft 210 under the drive of the drive device, thus ensuring the stability and reliability of the swing arm 200's movement. Furthermore, the fixing sleeve 400 is fixedly installed in the rear end of the mounting cavity 120 by means of a snap fastener connection to cooperate with the limiting rib 140 to limit and lock the swing arm 200 in the mounting cavity 120.
[0034] In this embodiment, the swing arm 200 drives the hair-planting block 300 to move up and down along the guide groove 112 by an amplitude of 0.1mm-2mm.
[0035] In some other specific embodiments, two or more guide protrusions 321 may be provided on the hair implantation block 300, that is, at least one guide protrusion 321 is provided on the sidewalls of the hair implantation block 300 on both sides of the second central axis B.
[0036] In some other specific implementations, a guide groove 112 can be provided on the tufted block 300, and a corresponding guide protrusion 321 can be provided on the inner wall of the accommodating cavity 110, so that the two can work together to achieve up-down and left-right movement.
[0037] Compared with existing technologies, this invention has a simple and reasonable structure. Through the cooperation of the guide protrusion and the guide groove, the bristle block can swing left and right in the horizontal direction and move up and down in the vertical direction. In this way, the left and right swing of the bristle block can achieve up and down brushing during brushing, while the up and down movement of the bristle block can apply a vertical and gentle impact force to the tooth surface, allowing the bristles to better penetrate into the gaps between teeth and move in and out along the gaps to push out the residue in the gaps, thus improving the cleaning effect of the toothbrush head. At the same time, the bristle block can be easily installed into the receiving cavity of the brush handle through the mounting slot, and the guide protrusion can be locked into the corresponding guide groove. Furthermore, by limiting the position of the mounting slot on the receiving cavity and limiting the swing angle through the cooperation of the drive shaft and the swing slot, the movement of the guide protrusion within the guide groove is ensured, thus guaranteeing the reliability and stability of the bristle block movement.
[0038] The above-disclosed embodiments are merely examples of the present invention. However, the present invention is not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.
Claims
1. An electric toothbrush head for use with an electric toothbrush handle, comprising a brush arm, a swing arm, and a bristle-filled block; wherein, The brush rod has a first central axis, and a receiving cavity is provided on the upper surface of the brush rod corresponding to its front end. The brush rod has a mounting cavity extending forward from the rear end along the first central axis and communicating with the receiving cavity. The bristle block is movably limited and installed in the receiving cavity of the brush rod. The bristle block has a second central axis and is aligned by making the second central axis parallel to or collinear with the first central axis. The swing arm is installed in the mounting cavity of the brush rod and is linked and connected with the bristle block. The brush rod is characterized by having a vertically extending rotating shaft at the bottom center of the accommodating cavity, and the bottom of the bristle block is characterized by a rotating hole that cooperates with the rotating shaft to achieve rotation around the shaft. The hair implantation block has at least one guide protrusion on each side wall corresponding to the second central axis. The opening of the accommodating cavity has a mounting slot that corresponds one-to-one with the guide protrusion after the hair implantation block is deflected at least a first angle relative to the first central axis. The inner wall of the accommodating cavity also has a guide groove that corresponds one-to-one with the mounting slot and is connected to the guide protrusion for the guide protrusion to be embedded and slid to guide the hair implantation block to move up, down, left and right. The guide grooves on the accommodating cavity corresponding to the first central axis are arranged in opposite directions. The rear end of the hair-planting block is provided with a swing slot, and the front end of the swing rod is provided with a drive shaft that extends into the swing slot. The drive shaft drives the hair-planting block to swing left and right by contacting the inner walls of the opposite sides of the swing slot, and the maximum deflection angle of the single side driven by the swing rod to swing the hair-planting block is less than the first angle.
2. The electric toothbrush head according to claim 1, characterized in that, The amplitude of the up-and-down movement of the hair-planting block along the guide groove is 0.1mm-2mm.
3. An electric toothbrush head according to claim 1, characterized in that, The front end of the swing arm is provided with a positioning shaft, and the brush rod is provided with a positioning hole that cooperates with the positioning shaft to realize the swing arm swinging left and right around the shaft.
4. An electric toothbrush head according to claim 1, characterized in that, The front end of the drive shaft is provided with a bent part that is arranged in a bend and placed in the swing groove. The bent part contacts the corresponding inner walls on both sides of the swing groove to drive the hair-planting block to swing left and right.
5. An electric toothbrush head according to claim 1, characterized in that, It also includes a fixing sleeve, which is fixedly installed in the rear end of the mounting cavity to limit and lock the swing arm in the mounting cavity.
6. An electric toothbrush head according to claim 1, characterized in that, The cross-sectional shape of the guide protrusion is circular, elliptical, triangular, or trapezoidal.
7. An electric toothbrush head according to claim 1, characterized in that, The guide groove is spiral, ramp, or arc-shaped.
8. An electric toothbrush head according to claim 1, characterized in that, The guide protrusion is integrally connected to the hair-planting block, or the guide protrusion is a separate component installed on the hair-planting block.