CN110638546A

CN110638546A - Electric tooth brush

Info

Publication number: CN110638546A
Application number: CN201910853720.5A
Authority: CN
Inventors: 李冬保; 李保正
Original assignee: Shenzhen Risun Technology Co Ltd
Current assignee: Shenzhen Risun Technology Co Ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-01-03

Abstract

The invention discloses an electric toothbrush, which comprises a brush head and a handle detachably connected with the brush head, wherein the handle comprises a handle body and a driving shaft which is connected with the handle body and protrudes out of the handle body, a convex block is arranged on the outer surface of the driving shaft, the brush head comprises a brush head shell and a connecting sleeve arranged in an inner cavity of the brush head shell, the connecting sleeve is provided with a groove, and the groove is matched with the convex block to connect the brush head and the handle. The electric toothbrush provided by the invention has the advantages that the connection between the toothbrush head and the handle is stable, the structure is simple, the plugging and the unplugging are simple and easy, and in the assembling process, a crisp 'click' sound can be generated, so that whether the toothbrush head assembly and the handle are installed in place or not can be conveniently distinguished.

Description

Electric tooth brush

Technical Field

The invention relates to the field of electric toothbrushes, in particular to an electric toothbrush.

Background

The brush head is worn and abraded, bacteria are accumulated and the cleaning effect is poor due to long-term use of the brush head, the brush head needs to be replaced periodically, so that the brush head and the handle need to be detachable, and the problems of complex structure and inconvenient installation and removal commonly exist between the existing brush head and the handle.

Because the plug requirement to the brush head is than higher, if the brush head assembly is too tight, then be difficult to change the brush head, and damage electric toothbrush easily hard at the change in-process, and when the brush head assembly was too loose, thereby can cause the collision of brush head and drive shaft etc. and cause great noise, and then influence user experience.

Some electric toothbrush's drive shaft is connected with the brush head through first inserts of brush, and first inserts of brush generally make through injection molding process, have great injection moulding tolerance and assembly tolerance, make the cooperation not compact between drive shaft, first inserts of brush and the brush head three from this to produce great noise.

In addition, because the plug number of times of brush head is more, make brush head and drive shaft contact site wearing and tearing big from this, the long cooperation of then can appearing between drive shaft and the toothbrush head of live time is not hard up to cause great noise, and easily take place the toothbrush head at toothbrush operating condition and take off the trouble.

Some electric toothbrushes are connected with a driving shaft by arranging a clamping block inside a brush head shell, so that the structure is complex, the brush head is not stable enough, and the electric toothbrush is not flexible and convenient to use.

Some electric toothbrushes are fixed with a driving shaft by adopting an opening of a brush head shell, so that the appearance is not attractive enough, water is easy to enter, and the service life of the electric toothbrush is shortened.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the electric toothbrush which is stable in connection between the toothbrush head and the handle, simple in structure and easy to insert and pull out.

One of the purposes of the invention is realized by adopting the following technical scheme:

the electric toothbrush comprises a toothbrush head and a handle detachably connected with the toothbrush head, wherein the handle comprises a handle body and a driving shaft which is connected with the handle body and protrudes out of the handle body, a convex block is arranged on the outer surface of the driving shaft, the toothbrush head comprises a toothbrush head shell and a connecting sleeve arranged in the inner cavity of the toothbrush head shell, the connecting sleeve is provided with a groove, and the groove is matched with the convex block to connect the toothbrush head with the handle.

Furthermore, the connecting sleeve is provided with a bottom edge close to the handle body, the groove is recessed from the bottom edge of the connecting sleeve to a direction far away from the handle body to form the groove for the lug to be embedded into, and the groove penetrates through the inner wall surface of the connecting sleeve to the outer wall surface of the connecting sleeve.

Furthermore, the side of one of the lug and the groove is provided with a limiting part for limiting the axial displacement of the connecting sleeve and the driving shaft, the other one of the lug and the groove is provided with a limiting groove for matching with the limiting part, and the limiting part is matched with the limiting groove to limit the axial displacement of the connecting sleeve brush head and the handle driving shaft.

Furthermore, the edge profiles of the limiting part and the limiting groove are both curved surfaces; alternatively, the first and second electrodes may be,

the limiting part and the limiting groove are triangular; alternatively, the first and second electrodes may be,

the limiting part and the limiting groove are in a trapezoidal shape.

Furthermore, the lug is provided with the limiting parts, the groove is provided with the limiting grooves, the lug comprises a first side surface and a second side surface which is arranged at intervals with the first side surface along the circumferential direction of the driving shaft, the number of the limiting parts is two, and the two limiting parts are respectively arranged on the first side surface and the second side surface; the limiting grooves comprise a third side face and a fourth side face arranged along the circumferential direction of the connecting sleeve at intervals with the third side face, two limiting grooves are formed in the limiting grooves, and the two limiting grooves are formed in the third side face and the fourth side face respectively.

Furthermore, a first avoiding inclined plane which is convenient for the lug to be embedded into is formed at the joint of the groove and the bottom edge of the connecting sleeve.

Furthermore, the end part of the lug, which is far away from the handle body, is formed with a second avoiding inclined plane which is matched with the first avoiding inclined plane so as to facilitate the lug to be embedded into the groove.

Further, the connecting sleeve is fixed on the inner cavity of the brush head shell through ultrasound, hot melting or glue.

Further, the brush head shell and the connecting sleeve are integrally formed.

Furthermore, one end of the connecting sleeve is connected with the brush head shell, and the outer wall surface of the other end of the connecting sleeve is arranged at an interval with the inner wall surface of the brush head shell.

Further, the electric toothbrush further comprises a motor which is arranged in the handle body and is used for driving the driving shaft to vibrate at high frequency.

Compared with the prior art, the invention has the beneficial effects that: the electric toothbrush provided by the invention has the following advantages that the convex block and the groove are plugged and pulled in the axial direction of the toothbrush by the plug buckle:

1. the surface of the brush head shell is not required to be grooved, so that the sealing performance and the waterproof performance are improved, the service life of the toothbrush is prolonged, the lines on the surface of the brush head are smoother, and the attractiveness is improved.

2. The groove is arranged in the inner cavity of the brush head, and the deformation direction has larger degree of freedom relative to the arrangement of the groove on the shell of the brush head.

3. The handle is good in hand feeling and convenient to control, the service life of plugging and unplugging can be prolonged, and a crisp 'click' sound can be sent out when the convex block and the groove are clamped, so that whether the brush head assembly and the handle are installed in place or not can be conveniently distinguished.

4. The brush head has the advantages of reasonable and ingenious structural design, simple and stable structure, and convenience in mounting and dismounting the brush head without using fasteners such as screws.

Drawings

FIG. 1 is an exploded view of a powered toothbrush provided by an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is another perspective illustration of an exploded view of the electric toothbrush provided by the present embodiment;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is a partial schematic view of one embodiment of a brush head housing and attachment sleeve;

FIG. 6 is a partial cross-sectional view of an electric toothbrush provided in accordance with an embodiment of the present invention;

fig. 7 shows six embodiments of the bumps and grooves.

In the figure:

100. an electric toothbrush; 1. a brush head; 11. a brush head housing; 12. a connecting sleeve; 120. a groove; 1201. a first avoidance inclined plane; 1202. a third side; 1203. a fourth side; 121. a bottom edge; 2. a handle; 21. a handle body; 22. a drive shaft; 221. a bump; 2211. a bump body; 2212. a first side surface; 2213. a second side surface; 2214. a limiting part; 2214', a limiting groove; 2215. the second keeps away a position inclined plane.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

It should be noted that all the directional indications (such as upper, lower, left, right, front, back, top and bottom … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indication is changed accordingly.

It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Referring to fig. 1 to 5, the present invention provides an electric toothbrush 100, the electric toothbrush 100 includes a brush head 1 and a handle 2 detachably connected to the brush head 1, the handle 2 is configured to be conveniently held by a user, the brush head includes a brush head housing 11 and a connection sleeve 12 disposed in an inner cavity of the brush head housing 11, the handle 2 includes a handle body 21 and a driving shaft 22 connected to the handle body 21 and protruding out of the handle body 21, a vibration motor is disposed in the handle body 21 and capable of outputting high frequency vibration after power supply, the driving shaft 22 is inserted into the connection sleeve 12, and the outer surface of the driving shaft 22 is convexly provided with a projection 221, the connecting sleeve 12 is provided with a bottom edge 121 close to the handle body 21, the connecting sleeve 12 is recessed from the bottom edge 121 to the direction far away from the handle body 21 to form a groove 120 for embedding the projection 221, and the projection 221 is matched with the groove 120 to connect the sleeve 12 and the driving shaft 22.

During assembly, the driving shaft 22 is inserted into the connecting sleeve 12, and the projection 221 is embedded into the groove 120 along the axial direction, so that the connection between the connecting sleeve 12 and the driving shaft 22 is realized, the connection between the brush head 1 and the handle 2 is further realized, and the connection between the projection 221 and the groove 120 plays a role in limiting and connecting.

In other embodiments, the groove 120 may also penetrate from the inner wall surface to the outer wall surface of the connecting sleeve 12, but does not extend to the bottom edge 121, and a gap (not shown) is opened between the bottom edge 121 and the groove 120, so that when the driving shaft 22 is inserted into the connecting sleeve 12, the connecting sleeve 12 can be expanded through the gap, and the protrusion 221 is inserted into the groove, thereby realizing the connection between the connecting sleeve 12 and the driving shaft 22, and further realizing the connection between the brush head 1 and the handle 2.

The number of the projections 21 may be 1, 2 or more, and preferably the projections 221 are equally spaced along the outer surface of the drive shaft 22, and the number of the grooves 120 is adapted to the number of the projections 221. Preferably, the number of the bumps is 1, the manufacturing process is simpler, and the production efficiency and the yield are higher.

The shape of the protrusion 221 is the same as that of the groove 120, the protrusion 221 has a first side 2212 and a second side 2213 opposite to the first side 2212 in the circumferential direction of the driving shaft 22, the limiting groove has a third side 1202 and a fourth side 1203 opposite to the third side 1202 in the circumferential direction of the connecting sleeve 12, and there are various ways to realize the locking of the protrusion 221 and the groove 120 in the axial direction, which may be: a limiting part 2214 is respectively arranged on the first side 2212 and the second side 2213 in a protruding mode, corresponding positions on the third side 1202 and the fourth side 1203 on the groove 120 are recessed, the bump 221 is clamped into the groove 120 along the axial direction, and the limiting part 2214 and the corresponding recessed position on the groove 120 are axially buckled; the method can also comprise the following steps: the first side 2212 and the second side 2213 are respectively provided with a concave limiting groove 2214 ', the corresponding position on the groove 120 is protruded, and similarly, the protrusion 221 is axially clamped into the groove 120, and the corresponding protruded position on the limiting groove 2214 ' and the groove 120 is clamped, and it can be understood that the limiting portion 2214 can be provided on one of the first side 2212 or the second side 2213, and similarly, the limiting groove 2214 ' is provided on one of the third side 1202 or the fourth side 1203.

The groove 120 may or may not penetrate from the inner wall surface to the outer wall surface of the coupling sleeve 12, and preferably the groove 120 penetrates the coupling sleeve 12, and the thickness of the projection 221 in the radial direction of the drive shaft 22 is preferably the same as the wall thickness of the coupling sleeve 12.

The shape of the position-limiting portion 2214 may be various, and the side surface of the position-limiting portion 2214 facing away from the main body 2211 may be a curved surface, or two, three or more surfaces may intersect in sequence, more specifically, the shape may be a triangle, a trapezoid or an irregular shape, and the corresponding position on the groove 120 is recessed to be the same shape. The bottom surface of the position-limiting groove 2214' may be a curved surface, or two, three or more surfaces may intersect in sequence, more specifically, may be triangular, trapezoidal or irregular, and the corresponding positions on the groove 120 are protruded to have the same shape. Referring specifically to fig. 6 and 7, there are shown different manners of the stopper portion 2214 or the stopper groove 2214 ', specifically, six embodiments (a, b, c, d, e, and f) different in that the stopper portion 2214 or the stopper groove 2214' is formed as

stopper portions

2214a, 2214b, and 2214c, and stopper grooves 2214'd, 2214' e, and 2214 f.

Preferably, the joint of the groove 120 and the bottom edge of the connecting sleeve 12 is formed as a first avoiding inclined plane 1201, so that when the protrusion 221 is inserted, the first avoiding inclined plane 1201 can be pressed, the groove 120 deforms towards two sides after being stressed, the opening of the groove 120 becomes large, and the protrusion 221 can conveniently enter the groove 120.

And both ends of the portion of the protrusion 221 that enters the groove 120 first are preferably formed as second avoiding slopes 2215, which cooperate with the first avoiding slopes 1201, see c and f in fig. 7, to further facilitate the protrusion 221 entering the groove 120.

One end of the connecting sleeve 12 is connected with the inner side of the brush head housing 11, the outer wall surface of the other end is arranged at an interval with the inner wall surface of the brush head housing 11, and the connecting sleeve 12 is preferably coaxial with the brush head housing 11. The preferred brush head shell 11 and the connecting sleeve 12 are integrally formed, so that the cost is saved, the process steps are reduced, the production efficiency is improved, and the structural consistency of the two is high, so that the high-frequency vibration can be conveniently transmitted to the whole brush head 1 from the connecting sleeve 12.

The connecting sleeve 12 can also be fixed on the brush head shell 11 through ultrasound, hot melt or glue, so that the brush head shell 11 can be integrally formed firstly, and then the connecting sleeve 12 is connected to the brush head shell 11, thereby reducing the difficulty of mold forming.

Preferably, the brush head housing 11 is attached to the end surface of the handle body 21 facing the brush head 1, and after the driving shaft 22 is connected to the connecting sleeve 12 through the protrusion 221 and the groove 120, the brush head housing 11 and the handle body 21 do not need to be mechanically connected.

The electric toothbrush 100 provided by the invention has the following beneficial effects that the convex block 221 and the groove 120 are buckled and pulled in the axial direction of the toothbrush:

1. the surface of the brush head shell 11 is not required to be grooved, so that the sealing performance and the waterproof performance are improved, the service life of the toothbrush is prolonged, the lines on the surface of the brush head 1 are smoother, and the attractiveness is improved.

2. The groove 120 is arranged in the inner cavity of the brush head 1, and has larger degree of freedom in the deformation direction relative to the deformation direction arranged on the brush head shell 11.

3. The hand feeling is good, the control is convenient, the plugging and unplugging service life can be prolonged, and the bump 221 and the groove 120 can make a crisp 'click' sound when being clamped, so that whether the brush head 1 and the handle 2 are installed in place or not can be conveniently distinguished.

4. The brush head has the advantages of reasonable and ingenious structural design, simple and stable structure, and convenience in mounting and dismounting the brush head 1 without using fasteners such as screws.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. The electric toothbrush comprises a toothbrush head and a handle detachably connected with the toothbrush head, wherein the handle comprises a handle body and a driving shaft which is connected with the handle body and protrudes out of the handle body, and a convex block is arranged on the outer surface of the driving shaft.

2. The electric toothbrush according to claim 1, wherein the connecting sleeve has a bottom edge close to the handle body, the groove is formed by being depressed from the bottom edge of the connecting sleeve in a direction away from the handle body to allow the protrusion to be inserted therein, and the groove penetrates from an inner wall surface of the connecting sleeve to an outer wall surface of the connecting sleeve.

3. The electric toothbrush according to claim 1, wherein one of the projection and the groove is provided at a side thereof with a stopper portion, and the other is provided with a stopper groove for engaging with the stopper portion, the stopper portion engaging with the stopper groove for restricting axial displacement of the brush head and the handle.

4. The electric toothbrush according to claim 3, wherein the edge profile of the stopper portion and the groove bottom surface of the stopper groove are both curved surfaces; alternatively, the first and second electrodes may be,

the limiting part and the limiting groove are both triangular; alternatively, the first and second electrodes may be,

the limiting part and the limiting groove are both trapezoidal.

5. The electric toothbrush according to claim 3, wherein the projection is provided with the stopper, the recess is provided with the stopper groove, the projection includes a first side surface and a second side surface spaced apart from the first side surface in a circumferential direction of the drive shaft, two stopper portions are provided, and the two stopper portions are provided on the first side surface and the second side surface, respectively; the limiting grooves comprise a third side face and a fourth side face arranged along the circumferential direction of the connecting sleeve at intervals with the third side face, two limiting grooves are formed in the limiting grooves, and the two limiting grooves are formed in the third side face and the fourth side face respectively.

6. The electric toothbrush according to claim 2, wherein a first relief slope for the protrusion to be inserted is formed at a junction of the groove and the bottom edge of the connection sleeve.

7. The powered toothbrush as defined in claim 6, wherein the end of the protrusion remote from the handle body is formed with a second relief slope engaging the first relief slope and facilitating insertion of the protrusion into the recess.

8. The powered toothbrush of claim 1, wherein the attachment sleeve is secured to the interior cavity of the head housing by ultrasonic, heat staking or glue.

9. The powered toothbrush of claim 1, wherein the brushhead housing and the connecting sleeve are integrally formed.

10. The electric toothbrush according to claim 1, wherein one end of the connection sleeve is connected to an inner side of the head housing, and an outer wall surface of the other end is spaced apart from an inner wall surface of the head housing.