CN220530166U

CN220530166U - Electric toothbrush head with low noise and capable of automatically centering

Info

Publication number: CN220530166U
Application number: CN202321860047.6U
Authority: CN
Inventors: 郑楚钶; 熊思俊; 郑建立
Original assignee: Ningbo Aolbea Oral Care Products Co ltd
Current assignee: Ningbo Aolbea Oral Care Products Co ltd
Priority date: 2023-07-14
Filing date: 2023-07-14
Publication date: 2024-02-27
Anticipated expiration: 2033-07-14

Abstract

The utility model discloses an electric toothbrush head with low noise and automatic centering, which comprises a brush rod, a swing rod, a fixing sleeve and a bristle planting block, wherein the brush rod is provided with a containing cavity and a mounting cavity; the swing rod is arranged in the mounting cavity and abuts against the limiting stop rib, the front end part of the swing rod is provided with a positioning rotating shaft, the limiting stop rib is provided with a positioning hole, and the front end part of the swing rod is also provided with a transmission shaft which is in linkage connection with the hair-planting block; elastic reset pieces are symmetrically arranged on two sides of the swing rod; the fixed sleeve is arranged in the rear end part of the mounting cavity. The elastic resetting piece on the two sides of the brush rod has the advantages that the elastic resetting piece is simple and reasonable in structure, the buffering effect can be achieved to reduce noise, the swinging rod has an automatic centering function, the extension axes of the bristle planting block and the brush rod can be always located on the same straight line or the same parallel line, and the overall attractiveness and consistency are guaranteed.

Description

Electric toothbrush head with low noise and capable of automatically centering

Technical Field

The utility model relates to the technical field of electric toothbrushes, in particular to an electric toothbrush head which is low in noise and capable of automatically centering.

Background

The electric toothbrush is a toothbrush invented by Philipe-Guy world, the brush head generates high-frequency vibration through the rapid rotation or vibration of the motor core, toothpaste is instantaneously decomposed into fine foam to deeply clean the gaps between teeth, and meanwhile, the vibration of the brush hair can promote the blood circulation of the oral cavity and has a massage effect on gum tissues.

The existing electric toothbrush generally comprises an electric toothbrush handle and an electric toothbrush head which are matched for use, wherein the electric toothbrush head comprises a bristle planting block with bristles and a swinging rod connected with the bristle planting block in a linkage way, the electric toothbrush handle comprises a driving device, the swinging rod of the electric toothbrush head can swing left and right under the driving of the driving device of the electric toothbrush handle so as to drive the bristle planting block to swing left and right, and the effect of automatic up and down brushing can be achieved through the left and right swinging of the bristle planting block when the electric toothbrush is held and brushing is carried out; however, in the using process, collision inevitably occurs in the process of driving the swing rod by the driving device, so that the noise is larger; meanwhile, the time for controlling the driving device to stop by a user in the using process is uncertain, so that the swing rod can stay at any reachable position, and particularly when the bristle planting block is of an oval or rectangular structure, the extending axis of the bristle planting block and the extending axis of the brush rod are not in the same straight line or the same parallel line, and are arranged in an angle, so that the overall attractiveness of the electric toothbrush head is seriously damaged, and the electric toothbrush head has an improved space.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides the electric toothbrush head which is low in noise and capable of automatically aligning, the structure is simple and reasonable, the elastic reset pieces symmetrically arranged on the two sides of the swing rod can play a role in buffering to reduce noise, the swing rod has an automatic aligning function, the extension axes of the bristle planting block and the brush rod can be always on the same straight line or the same parallel line, and the overall aesthetic property and consistency of the electric toothbrush head are ensured.

In order to achieve the above purpose, the utility model provides an electric toothbrush head with low noise and automatic centering, which is used for being matched with an electric toothbrush handle and comprises a brush rod, a swing rod, a fixed sleeve and a bristle planting block with bristles, wherein the front end part of the brush rod is provided with a containing cavity for containing the bristle planting block, the brush rod is provided with a mounting cavity which extends forwards from the rear end part and is communicated with the containing cavity along the rod body, the bottom wall of the mounting cavity is provided with a limit rib, and the top of the limit rib and the top wall of the mounting cavity are arranged at intervals to form a through channel;

the swing rod is arranged in the mounting cavity of the brush rod, the front end part of the swing rod is propped against the limiting stop rib, a positioning rotating shaft is arranged on the front end part of the swing rod, which is propped against the limiting stop rib, a positioning hole for the positioning rotating shaft to pass through is correspondingly arranged on the limiting stop rib, and a transmission shaft which passes through the through channel and is in linkage connection with the hair planting block is arranged on the front end part of the swing rod, which is above the limiting stop rib;

elastic reset pieces are symmetrically arranged on two sides of the swing rod corresponding to the front end part of the swing rod, and the elastic reset pieces on the two sides enable the swing rod to always have a movement trend of rotating towards the center to realize centering;

the fixed sleeve is fixedly arranged in the rear end part of the mounting cavity so as to be matched with the limiting stop rib to limit the swing rod in the mounting cavity.

Further provided is that: the elastic reset parts at two sides of the swing rod are part of an integrated balance spring, and the balance spring comprises spring parts at two sides and connecting parts for connecting the spring parts at two sides.

Further provided is that: the two sides of the swing rod corresponding to the front end part of the swing rod are respectively provided with a notch for the spring part to be embedded and an embedding opening for the connection part to be embedded by extending and conducting the notches on the two sides from the front end surface of the swing rod backwards.

Further provided is that: the front end face of the swing rod is provided with an anti-rotation socket, and the tail part of the transmission shaft is provided with a step;

when the transmission shaft is fixedly inserted into the anti-rotation socket of the swing rod, the step is pressed against the connecting part of the balance spring.

Further provided is that: the swing rod is correspondingly provided with an exhaust hole communicated with the rear end of the anti-rotation socket, and the extension axis of the exhaust hole is parallel or perpendicular to the extension axis of the anti-rotation socket.

Further provided is that: positioning columns matched with the inner holes of the spring parts are arranged in the notches on two sides.

Further provided is that: the elastic reset pieces at two sides are fixedly connected with balance pieces, and guide fixing grooves for embedding the balance pieces are correspondingly formed in two opposite side walls of the installation cavity.

Further provided is that: the guide fixing groove is provided with a balancing piece blocking rib corresponding to the groove wall at the front end of the guide fixing groove, the balancing piece blocking rib is matched with the front end of the guide fixing groove to form a limiting containing area for limiting and containing the balancing piece, and the front wall surface of the balancing piece blocking rib is tangent to the outer surface of the balancing piece and the rear wall surface of the balancing piece blocking rib is of an inclined surface or cambered surface structure for guiding the balancing piece to slide in.

Further provided is that: the front end part of the transmission shaft is provided with a bending part which is arranged in a bending way, the bristle planting block is provided with a swinging notch which is at least used for the insertion of the bending part, and the bending part is in left-right contact with the inner walls of two opposite sides of the swinging notch to drive the bristle planting block to swing left and right.

Further provided is that: the bottom of the accommodating cavity is provided with a central rotating shaft which extends vertically, and the bottom of the hair-planting block is correspondingly provided with a matching hole matched with the central rotating shaft.

Compared with the prior art, the electric toothbrush has a simple and reasonable structure, the elastic reset pieces symmetrically arranged on the two sides of the swing rod not only can play a role in buffering to reduce noise, but also can enable the swing rod to have an automatic centering function, can ensure that the extension axes of the bristle planting block and the brush rod are always on the same straight line or the same parallel line, and ensures the overall aesthetic property and consistency of the electric toothbrush head.

Drawings

FIG. 1 is a schematic view of an electric toothbrush head in a non-centered state;

FIG. 2 is a schematic view of the structure of the electric toothbrush head in a centered state;

FIG. 3 is an axial cross-sectional schematic view of a low acoustic noise and self-centering electric toothbrush head of the present utility model;

FIG. 4 is a schematic cross-sectional view of the electric toothbrush head corresponding to the elastic restoring member;

FIG. 5 is an overall exploded view of the powered toothbrush head;

FIG. 6 is a further schematic illustration of the front end of the pendulum rod of FIG. 5;

FIG. 7 is a schematic view of an axial cross-sectional structure of a brush bar;

FIG. 8 shows a first embodiment of a rocker;

fig. 9 shows a second embodiment of the pendulum rod.

The following reference numerals are attached thereto in combination with the accompanying drawings:

100. a brush bar; 110. a receiving cavity; 111. a guide groove; 120. a mounting cavity; 121. a guide fixing groove; 1211. a balancing piece blocking rib; 130. limiting stop ribs; 131. positioning holes; 132. a through passage; 140. a central spindle; 200. swing rod; 210. positioning a rotating shaft; 220. a transmission shaft; 221. a bending part; 222. a step; 230. a notch; 240. a notch is formed; 250. positioning columns; 260. anti-rotation socket; 270. an exhaust hole; 300. planting a wool block; 310. brushing; 320. a swing notch; 330. a mating hole; 340. a guide protrusion; 400. a fixed sleeve; 500. a balance spring; 510. a spring part; 520. a connection part; 530. and a balance member.

Detailed Description

One embodiment of the present utility model will be described in detail below with reference to the attached drawings, but it should be understood that the scope of the present utility model is not limited by the embodiment.

The utility model relates to an electric toothbrush head which has low noise and can automatically center, as shown in fig. 3 and 5, and is used for being matched with an electric toothbrush handle, wherein the electric toothbrush handle provides power required by the work for the electric toothbrush head; the electric toothbrush head comprises a brush rod 100, a swinging rod 200, a fixed sleeve 400 and a bristle planting block 300 with bristles 310, wherein the bristle planting block 300 is correspondingly arranged on the front end part of the brush rod 100, the swinging rod 200 is arranged in the brush rod 100, the front end part of the swinging rod 200 is connected with the bristle planting block 300 in a linkage way, and the fixed sleeve 400 is fixedly arranged in the brush rod 100 to limit the swinging rod 200 in the brush rod 100 so as to avoid the separation of the swinging rod 200; when the electric toothbrush head is matched with the electric toothbrush handle, the swing rod 200 can move under the drive of the driving device in the electric toothbrush handle to drive the bristle block 300 to swing left and right so as to achieve the automatic tooth brushing effect; the existing electric toothbrush head stays at any reachable position due to swing, so that the bristle block 300 and the brush rod 100 are in a non-centering state (as shown in figure 1) with high probability, namely, an included angle exists between the extending axis of the bristle block 300 and the extending axis of the brush rod 100, so that the overall aesthetic property and consistency of the electric toothbrush head are seriously damaged, and the purchasing desire of a purchaser is seriously influenced; the main purpose of this patent is to ensure that the bristle block 300 and the brush rod 100 are always aligned (as shown in fig. 2) when the electric toothbrush is stopped, i.e. the extending axis of the bristle block 300 and the extending axis of the brush rod 100 are always collinear or parallel.

In this embodiment, as shown in fig. 3 and fig. 5, the brush bar 100 is provided with a holding cavity 110 corresponding to the front end of the brush bar for holding the bristle block 300, the bottom of the holding cavity 110 is provided with a central rotating shaft 140 extending vertically, and a matching hole 330 matching with the central rotating shaft 140 is correspondingly formed at the bottom of the bristle block 300, so that the bristle block 300 can rotate left and right along the central rotating shaft 140 under the action of the swing rod 200, and the reliability and stability of the movement of the bristle block 300 are effectively ensured; meanwhile, guide protrusions 340 are arranged on two opposite side walls of the hair planting block 300 corresponding to the matching holes 330, guide grooves 111 for embedding the guide protrusions 340 and sliding the guide protrusions 340 are correspondingly arranged on two side inner walls of the accommodating cavity 110, the guide grooves 111 on two sides of the accommodating cavity 110 are in reverse extending arrangement, the guide grooves 111 are preferably in a spiral, slope or arc structure capable of guiding the hair planting block 300 to vertically move up and down, namely, the guide grooves 111 on one side of the accommodating cavity 110 extend obliquely forwards and upwards, and the guide grooves 111 on the other side extend obliquely backwards and downwards; so the swing rod 200 drives the bristle block 300 to swing left and right around the central rotating shaft 140 and can realize up-and-down movement, thereby greatly improving the cleaning effect of the toothbrush.

In this embodiment, as shown in fig. 3 and 5 in particular, the brush bar 100 is provided with a mounting cavity 120 extending forward from a rear end portion thereof along a bar body thereof and communicating with the accommodating cavity 110, the front end of the mounting cavity 120 being closed; the swing rod 200 is correspondingly arranged in the installation cavity 120 of the brush rod 100, the bottom wall of the installation cavity 120 is correspondingly provided with a limit stop rib 130 matched and propped against the front end part of the swing rod 200, and the top of the limit stop rib 130 and the top wall of the installation cavity 120 are arranged at intervals to form a through channel 132; a transmission shaft 220 is arranged above the front end part of the swing rod 200 corresponding to the limiting stop rib 130, and the transmission shaft 220 extends through the through channel 132 to be connected with the hair-planting block 300 in the accommodating cavity 110 in a linkage manner; the front end part of the swing rod 200 is provided with a positioning rotating shaft 210 corresponding to the limiting stop rib 130, and the limiting stop rib 130 is correspondingly provided with a positioning hole 131 for the positioning rotating shaft 210 to pass through, so that the swing rod 200 can rotate around the positioning rotating shaft 210 under the drive of a driving device, and the stability and the reliability of the movement of the swing rod 200 are ensured; the fixing sleeve 400 is fixedly installed in the rear end portion of the installation cavity 120 in a threaded connection manner so as to be matched with the limiting stop rib 130 to limit the swing rod 200 in the installation cavity 120.

In the above scheme, the swing rod 200 is connected with the hair-planting block 300 in a linkage way through the cooperation of the transmission shaft 220 and the swing notch 320; specifically, the transmission shaft 220 has a transverse 7-shaped structure, the front end part of the transmission shaft is provided with a bending part 221 which is arranged in a bending way, the bristle block 300 is provided with a swinging notch 320 at least for the bending part 221 to be inserted, and the opposite side walls of the swinging notch 320 are collided in the left-right deflection process of the bending part 221 so as to drive the bristle block 300 to swing left and right; the drive shaft 220 may also be a transverse "Y" or transverse "T" configuration, as desired.

In this embodiment, as shown in fig. 4, 5 and 6, elastic reset pieces are symmetrically arranged at two sides of the swing link 200 corresponding to the front end portion thereof, and the symmetrically arranged elastic reset pieces not only can play a role in buffering to reduce the noise generated in the working process of the swing link 200, but also can enable the swing link 200 to have an automatic centering function so as to enable the swing link 200 to automatically rotate towards the center when the driving device stops working, thus ensuring that the extension axes of the bristle block 300 and the brush rod 100 are always on the same straight line or the same parallel line, and guaranteeing the overall aesthetic property and consistency of the electric toothbrush head; in this embodiment, the symmetrically arranged elastic restoring member is a part of the integrated balance spring 500, and the balance spring 500 includes spring portions 510 located at two sides, and a connecting portion 520 integrally connecting the spring portions 510 at two sides, where the spring portions 510 are the elastic restoring member; in other embodiments, the elastic restoring members on both sides can be springs or other elastic members used independently, such as elastic sheets, elastic bodies, etc.; in this embodiment, the specific installation structure of the balance spring 500 on the swing link 200 is as follows: the swing rod 200 is provided with notches 230 for integrally embedding the spring part 510 and embedding openings 240 for embedding the connecting parts 520 by extending the notches 230 on two sides backwards from the front end surface of the swing rod 200, and positioning posts 250 matched with the inner holes of the spring part 510 are also arranged in the notches 230 on two sides; further preferably, the front end surface of the swing rod 200 is provided with an anti-rotation socket 260 for the fixing and inserting of the transmission shaft 220, the tail of the transmission shaft 220 is provided with a step 222 structure, and when the transmission shaft 220 is fixedly and inserted into the anti-rotation socket 260 of the swing rod 200, the step 222 structure is configured to be pressed against the connecting part 520 of the balance spring 500, so that the installation reliability of the balance spring 500 on the swing rod 200 is improved, and the detachment of the balance spring is avoided.

In the above-mentioned scheme, in order to facilitate the insertion of the transmission shaft 220, as shown in fig. 8 and 9, the rear end of the swing rod 200 corresponding to the anti-rotation socket 260 is provided with a vent hole 270 which is communicated with the rear end, and the extending axis of the vent hole 270 is parallel or perpendicular to the extending axis of the anti-rotation socket 260.

In this embodiment, as shown in fig. 6 and 7, the balance spring 500 is hooked with a balance member 530 corresponding to the spring portions 510 on both sides thereof, and guide fixing slots 121 for embedding the balance member 530 are correspondingly provided on both side walls of the installation cavity 120, and positioning and guiding functions are performed by matching the balance member 530 with the guide fixing slots 121 so as to facilitate the overall installation of the swing rod 200; the guide fixing groove 121 is provided with a balancing piece blocking rib 1211 corresponding to the front end groove wall, the balancing piece blocking rib 1211 is matched with the front end part of the guide fixing groove 121 to form a limiting accommodating area for limiting accommodating of the balancing piece 530, the front wall surface of the balancing piece blocking rib 1211 is matched with (tangent to) the outer surface of the balancing piece 530, and the rear wall surface of the balancing piece blocking rib 1211 is of an inclined surface or cambered surface structure for guiding the balancing piece 530 to slide in, so that after the balancing piece blocking rib is installed in place, the balancing piece 530 is limited and restrained in the limiting accommodating area, movement of the balancing piece 530 is limited, and sound noise is effectively reduced.

The above disclosure is merely an example of the present utility model, but the present utility model is not limited thereto, and any variations that can be considered by a person skilled in the art should fall within the protection scope of the present utility model.

Claims

1. The utility model provides a low noise and can automatic centering's electric toothbrush head, its is used for cooperating with electric toothbrush handle and uses, its characterized in that includes brush-holder stud, pendulum rod, fixed cover and has the bristle to plant the hair piece, the brush-holder stud is provided with the holding cavity that supplies to plant the hair piece to hold corresponding its front end, the brush-holder stud is provided with along its body of rod and extends forward with the holding cavity be linked together by the rear end installation cavity, be provided with spacing fender muscle on the diapire of installation cavity, be the interval arrangement in order to form the through-channel between spacing fender muscle's top and the roof of installation cavity;

2. The low noise and self-centering electric toothbrush head of claim 1, wherein the resilient return members on opposite sides of the rocker are part of an integral balance spring comprising spring portions on opposite sides and a connecting portion connecting the spring portions on opposite sides.

3. The electric toothbrush head with low noise and automatic centering according to claim 2, wherein the swing rod is respectively provided with notches for the spring part to be embedded on and two notches on two sides extending backwards from the front end surface of the swing rod for embedding the connecting part.

4. A low noise and automatic centering electric toothbrush head according to claim 2 or 3, wherein the front end face of the swing rod is provided with an anti-rotation socket, and the tail of the transmission shaft is provided with a step;

5. The electric toothbrush head with low noise and automatic centering function according to claim 4, wherein the swing rod is correspondingly provided with an exhaust hole communicated with the rear end of the anti-rotation socket, and the extending axis of the exhaust hole is parallel or perpendicular to the extending axis of the anti-rotation socket.

6. A low noise and self-centering electric toothbrush head as claimed in claim 3 wherein said notches on both sides are provided with locating posts which mate with the inner bores of the spring portions.

7. The electric toothbrush head with low noise and automatic centering function according to claim 1, wherein the elastic resetting pieces on two sides are fixedly connected with balancing pieces, and the opposite side walls of the mounting cavity are correspondingly provided with guide fixing grooves for embedding the balancing pieces.

8. The electric toothbrush head with low noise and automatic centering function according to claim 7, wherein the guiding and fixing groove is provided with a balancing piece blocking rib corresponding to the groove wall at the front end of the guiding and fixing groove, the balancing piece blocking rib is matched with the front end of the guiding and fixing groove to form a limiting accommodating area for limiting and accommodating the balancing piece, the front wall surface of the balancing piece blocking rib is tangent with the outer surface of the balancing piece, and the rear wall surface of the balancing piece blocking rib is an inclined surface or an arc surface structure for guiding the sliding in of the balancing piece.

9. The electric toothbrush head with low noise and automatic centering function according to claim 1, wherein the front end part of the transmission shaft is provided with a bending part which is arranged in a bending way, the bristle planting block is provided with a swinging notch into which at least the bending part is inserted, and the bending part is in left-right contact with the inner walls of two opposite sides of the swinging notch to drive the bristle planting block to swing left-right.

10. The electric toothbrush head with low noise and automatic centering function according to claim 1, wherein a vertically extending center rotating shaft is arranged at the bottom of the accommodating cavity, and a matching hole matched with the center rotating shaft is correspondingly arranged at the bottom of the bristle planting block.