Electric toothbrush driving shaft and brush head applied to same

Abstract

The present application relates to the field of electric toothbrushes. The electric toothbrush driving shaft comprises a shaft body of a hollow structure, one end of the shaft body is provided with a first connecting part used for being connected with the toothbrush head, and the other end of the shaft body is provided with a second connecting part used for being connected with a mounting base. The shaft body is provided with a damping device used for slowly releasing vibration force generated by the shaft body to the electric toothbrush shell, a connecting groove is formed in one end of the shaft body, the first connecting part comprises first connecting plates horizontally and fixedly connected to the inner wall of the connecting groove at intervals, and a connecting space connected with the brush head is formed between the first connecting plates and the inner wall of the connecting groove. The electric toothbrush has the effect of reducing the situation of looseness between the brush head and the driving shaft of the electric toothbrush.

Description

Technical Field

[0001] The present application relates to the field of electric toothbrushes, and in particular to an electric toothbrush drive shaft and a brush head applied to the electric toothbrush drive shaft. Background Art

[0002] As people's requirements for quality of life increase, daily oral care has become more and more particular, and many people choose to use electric toothbrushes instead of ordinary toothbrushes. Electric toothbrushes can more thoroughly remove dental plaque, reduce gingivitis and gum bleeding, and have obvious oral care effects; electric toothbrushes make the brush head produce high-frequency movement, instantly decompose the toothpaste into fine foam, and deeply clean the teeth, thereby achieving the effect of deep cleaning; at the same time, the vibration of the bristles can promote blood circulation in the mouth and have a massage effect on the gum tissue. At present, electric toothbrushes on the market can be divided into two categories according to the movement state of the brush head: rotary type and vibration type. The existing vibration type electric toothbrush is internally provided with a drive motor and a drive shaft. The drive motor and the drive shaft are connected together through the corresponding mounting seat and the eccentric wheel. The rotation of the drive motor drives the eccentric wheel to rotate, and the eccentric movement is used to make the drive shaft vibrate, and the other end of the drive shaft is connected to the brush head, thereby achieving the effect of high-frequency swing of the electric toothbrush head. The brush head and drive shaft of an existing electric toothbrush are usually connected by a plug-in structure. Due to the simplicity of this connection method, the drive shaft may easily become loose when driving the toothbrush head to vibrate back and forth, thereby affecting the vibration effect and making the cleaning effect less significant. Utility Model Content

[0003] In order to reduce the looseness between the brush head and the electric toothbrush drive shaft, the present application provides an electric toothbrush drive shaft and a brush head applied to the electric toothbrush drive shaft.

[0004] The present application provides an electric toothbrush drive shaft and a brush head applied to the electric toothbrush drive shaft using the following technical solutions:

[0005] A drive shaft of an electric toothbrush comprises a shaft body with a hollow structure, one end of the shaft body is provided with a first connecting portion for connecting to a toothbrush head, the other end of the shaft body is provided with a second connecting portion for connecting to a mounting seat, the shaft body is provided with a shock absorbing device for slowly releasing the vibration force generated by the shaft body on the electric toothbrush housing, one end of the shaft body is provided with a connecting groove, the first connecting portion comprises a first connecting plate fixedly connected to the inner wall of the connecting groove at a horizontal interval, and a connecting space connected to the brush head is formed between the first connecting plate and the inner wall of the connecting groove.

[0006] By adopting the above technical solution, when using, first connect the mounting sleeve to the second connecting part to form a complete driving mechanism with the electric toothbrush drive shaft, motor and eccentric wheel, and then install the driving mechanism inside the electric toothbrush shell after the connection. At this time, the end of the shaft body away from the second connecting part will drive the end of the first connecting part extending out of the electric toothbrush shell to connect with the brush head. After the connection is completed, start the motor, the motor and the eccentric wheel drive the shaft body to reciprocate, and the shaft body drives the toothbrush head to reciprocate rapidly to generate high-frequency vibration to clean the user's teeth. During the vibration process, the shock absorbing device will slowly release the force applied by the shaft body to the electric toothbrush shell, thereby reducing the numbness of the user's hand and improving the user's experience.

[0007] Optionally, a first limiting member for limiting the up and down position of the brush head and a second limiting member for limiting the left and right position of the brush head are provided in the connecting groove.

[0008] By adopting the above technical solution, when the toothbrush head is connected to the connection space, it may move up and down, left and right inside the connection groove, causing the brush head to move randomly when the shaft drives the brush head to make reciprocating motion, and cannot cooperate well with the shaft to make reciprocating motion. By setting the first limiting member and the second limiting member, the position of the brush head in the connection groove can be limited, so that the brush head can better cooperate with the shaft to move.

[0009] Optionally, the first limiting member includes a spring fixedly connected to the bottom of the connecting groove and a first limiting block fixedly connected to an end of the spring away from the connecting groove.

[0010] By adopting the above solution, when in use, the spring can cooperate with the first limiting block and the first connecting plate to limit the upper and lower positions of the brush head, thereby preventing the brush head from moving up and down in the connecting groove.

[0011] Optionally, the second limiting member includes a second limiting block fixedly connected to the first connecting plate on a side facing the bottom of the connecting groove.

[0012] By adopting the above technical solution, when in use, the second limiting block, the matching spring, the first limiting block and the first connecting plate limit the left and right positions of the brush head to prevent the brush head from moving left and right in the connecting groove.

[0013] Optionally, a first positioning groove is provided on the outer side of the shaft body corresponding to the connecting groove, and the first positioning groove is vertically provided along the height direction of the shaft body.

[0014] By adopting the above technical solution and setting the first positioning groove, it can be matched with the brush head to determine the connection position.

[0015] Optionally, the shock absorbing device includes a shock absorbing ball fixedly connected to the shaft and located close to the first connecting portion, and the shock absorbing ball is made of shock absorbing material.

[0016] By adopting the above technical solution, when in use, since the shaft and the electric toothbrush shell will contact at the port where the shaft protrudes from the electric toothbrush shell, the reciprocating vibration of the shaft will also impact the port of the electric toothbrush, thereby intensifying the vibration of the electric toothbrush shell, so that the user will also feel the vibration when using it. By arranging a shock-absorbing ball on the shaft, the shaft can transmit force to the electric toothbrush shell through the shock-absorbing ball. When the force is transmitted to the electric toothbrush shell, most of it has been released by the shock-absorbing ball, and the vibration on the electric toothbrush shell is also weakened.

[0017] Optionally, the second connection portion includes a plug pin fixedly connected to an end of the shaft body away from the first connection portion, and an embedded block is fixedly connected to the outer side of the plug pin.

[0018] By adopting the above technical solution, when in use, the driving shaft of the existing electric toothbrush is usually directly inserted into the mounting seat through the plug-in pin, and indirectly connected to the eccentric wheel and the motor through the mounting seat. However, due to the use of a simple plug-in structure, it is easy to loosen during vibration. By coordinating the small embedding blocks on the two side walls of the plug-in pin and then providing the embedding grooves at the corresponding positions of the mounting seat, the embedding blocks can be embedded into the embedding grooves provided in the mounting seat by pressing during the process of inserting the plug-in pin into the mounting seat, thereby reducing the probability of the plug-in pin loosening.

[0019] Optionally, it includes a brush head body, bristles fixedly connected to one side of the brush head body, and a connecting column fixedly connected to one end of the brush head body, wherein the connecting column is used to be embedded in the connecting groove.

[0020] By adopting the above technical solution, when in use, the brush head and the shaft body are installed together by inserting the connecting column into the connecting groove.

[0021] Optionally, a second connecting plate is fixedly connected to the side wall of the connecting column at horizontal intervals, and an embedding space for a second connecting plate to be embedded is formed between two adjacent first connecting plates. The second connecting plate is abutted against the side of the first connecting plate facing the bottom of the connecting groove, and the second connecting plate is provided with a limiting groove for the second limiting block to be embedded on the side facing the brush head body.

[0022] By adopting the above technical solution, when in use, in the process of inserting the connecting column into the connecting groove, the second connecting plate will follow the connecting column into the space between the two first connecting plates, and then push the connecting column to move toward the bottom of the connecting groove. When the second connecting plate moves to the bottom of the first connecting plate, the brush head is rotated so that the second connecting plate abuts against the bottom of the first connecting plate. At this time, the first limiting block abuts against the second connecting plate under the action of the spring force, so that the second connecting plate and the first connecting plate fit together more closely; when the toothbrush head needs to be replaced, the toothbrush head is pressed downward and the second connecting plate is rotated back between the two first connecting plates to be pulled out of the connecting groove. Only by limiting the first connecting plate and the second connecting plate by the spring and the first limiting block can only ensure that the upper and lower positions of the two remain unchanged, and the second connecting plate may also rotate in the connecting groove. Through the coordinated setting of the second limiting block and the limiting groove, during use, when the second connecting plate is rotated to overlap with the first connecting plate, the spring pushes the second connecting plate to move in the direction of the first connecting plate, so that the second limiting block on the first connecting plate can be just embedded in the limiting groove of the second connecting plate, so that the two are more firmly connected together, reducing the probability of the connecting column loosening in the connecting groove.

[0023] Optionally, a second positioning groove is provided on the outer side of the brush head body, and the second positioning groove is vertically provided along the height direction of the brush head body.

[0024] By adopting the above technical solution, when in use, since the connecting column rotates inside the connecting groove, it is difficult to judge the rotation angle. By cooperating with the first positioning groove through the second positioning groove, when the two are rotated to be vertically connected to each other, the second connecting plate just rotates to be directly below the first connecting plate.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. Through the arrangement of the connecting column and the connecting groove, the first connecting plate and the second connecting plate, the brush head can be disassembled and installed with the driving shaft by rotating;

[0027] 2. Through the cooperation between the spring and the first limiting block, the second limiting block and the limiting groove, when the first connecting plate and the second connecting plate overlap and abut against each other, the left, right, up and down positions are restricted, which not only firmly mounts the brush head on the driving shaft, but also reduces the probability of looseness between the brush head and the driving shaft;

[0028] 3. Through the design of the shock-absorbing ball, the force generated by the vibration of the drive shaft can be slowly released by the shock-absorbing ball and then transmitted to the electric toothbrush shell, which effectively reduces the vibration felt by the user during use and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1Schematic diagram of the overall structure of the electric toothbrush drive shaft and brush head in this application.

[0030] Figure 2 It is a partial cross-sectional schematic diagram of the overall structure of the present application.

[0031] Figure 3 yes Figure 2 A magnified schematic diagram of center A.

[0032] Figure 4 It is a three-dimensional schematic diagram of the overall structure of this application.

[0033] Figure 5 yes Figure 4 A magnified schematic diagram of point B in the middle.

[0034] Explanation of the accompanying drawings: 1. shaft; 11. first connecting part; 111. first connecting plate; 112. spring; 113. first limiting block; 114. second limiting block; 12. second connecting part; 121. plug-in pin; 122. embedding block; 13. connecting groove; 14. first positioning groove; 2. brush head body; 21. bristles; 22. connecting column; 221. second connecting plate; 222. limiting groove; 23. second positioning groove; 3. shock absorbing device; 31. shock absorbing ball. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-5 This application is described in further detail.

[0036] The present application embodiment discloses an electric toothbrush drive shaft and a brush head applied to the electric toothbrush drive shaft, referring to Figure 1-Figure 5 The electric toothbrush head comprises a brush head body 2, bristles 21 fixed to one side of the brush head body 2, and a connecting column 22 fixed to one end of the brush head body 2. Horizontally opposite second connecting plates 221 are fixed to the side wall of the connecting column 22, and the two second connecting plates 221 are in the shape of a quarter of a circle, and the two second connecting plates 221 are respectively provided with limiting grooves 222 with a square cross section on the side away from the brush head body 2. A second positioning groove 23 is provided on the outer side of the brush head body 2, and the second positioning groove 23 is vertically provided along the height direction of the brush head body 2.

[0037] Reference Figure 1 and Figure 2 The driving shaft of the electric toothbrush includes a shaft body 1, the interior of the shaft body 1 is arranged as a hollow structure, one end of the shaft body 1 is provided with a first connecting portion 11 for connecting to a toothbrush head, and the other end of the shaft body 1 is provided with a second connecting portion 12 for connecting to a mounting seat. The shaft body 1 is also provided with a shock absorbing device 3 for slowly releasing the vibration force generated by the shaft body 1 on the electric toothbrush housing.

[0038] Reference Figure 2-Figure 5The end of the shaft body 1 away from the second connecting portion 12 is provided with a connecting groove 13 with a circular cross section. The first connecting portion 11 includes a first connecting plate 111 horizontally fixed to the inner wall of the connecting groove 13. The two first connecting plates 111 are both in the shape and size of a circular ring plate with a diameter equal to one-quarter of the cross-sectional diameter of the connecting groove 13. A connecting space is formed between the two first connecting plates 111 and the inner wall of the connecting groove 13 for the connecting column 22 and the two second circular ring plates to be respectively embedded.

[0039] Reference Figure 2 and Figure 3 A first limiting member for limiting the upper and lower positions of the two second connecting plates 221 is provided in the connecting groove 13. The first limiting member includes a spring 112 fixed to the bottom of the connecting groove 13 and a first limiting block 113 fixed to one end of the spring 112 away from the bottom of the connecting groove 13. The first limiting block 113 is circular.

[0040] The two first connecting plates 111 are respectively fixedly connected with second limiting blocks 114 on one side facing the bottom of the connecting groove 13 . The two second limiting blocks 114 are square in shape and sized to fit into the limiting groove 222 .

[0041] Reference Figure 4 The first positioning groove 14 is provided on the outer side of the shaft body 1 corresponding to the connecting groove 13, and the first positioning groove 14 is vertically provided along the height direction of the shaft body 1. When in use, when the brush head body 2 is rotated until the first connecting groove 13 and the second connecting groove 13 are vertically opposite and connected, the second connecting plate 221 is just rotated to the bottom of the first connecting plate 111, and the user can judge whether the connecting column 22 is rotated to the appropriate position in this way.

[0042] The second connection part 12 includes a plug pin 121 fixedly connected to the end of the shaft body 1 away from the connection groove 13. The cross section of the plug pin 121 is a flat ellipse, and a flat ring-shaped embedded block 122 is fixedly connected to the outer wall of the plug pin 121. When in use, the mounting seat will be provided with an embedded groove. When the plug pin 121 is inserted into the mounting seat, the embedded block 122 will also be pressed into the embedded groove on the mounting seat. Through the double plug-in fit and embedded setting, the plug pin 121 and the mounting seat can be connected more tightly, thereby reducing the probability of looseness between the shaft body 1 and the mounting seat.

[0043] Reference Figure 1The shock absorbing device 3 includes a shock absorbing ball 31 fixedly connected to the shaft body 1 and located near the mounting groove. The shock absorbing ball 31 is made of shock absorbing materials such as rubber shock absorbing materials, polyurethane materials, and polypropylene materials. When in use, the shock absorbing ball 31 will be installed at the open end of the electric toothbrush shell and abut against the inner wall of the electric toothbrush shell. When the starter motor drives the toothbrush head to vibrate back and forth through the drive shaft, the shock absorbing ball 31 will contact the electric toothbrush shell instead of the drive shaft. At this time, the force generated by the repeated vibration of the drive shaft will first be transmitted to the shock absorbing ball 31, and then transmitted to the electric toothbrush shell after being slowly released by the shock absorbing ball 31, thereby reducing the numbness felt by the user's hand during use and improving the user's experience.

[0044] The implementation principle of an electric toothbrush drive shaft and a brush head applied to the electric toothbrush drive shaft in an embodiment of the present application is as follows: when in use, first install the plug pin 121 together with the embedding block 122 and the mounting seat, and then assemble the drive shaft, the mounting seat, the eccentric wheel and the motor into a complete electric toothbrush drive mechanism; then install the assembled drive mechanism into the interior of the electric toothbrush housing, at this time, the end of the drive shaft with the connecting groove 13 will extend out of the open end of the electric toothbrush housing, and the shock-absorbing ball 31 will contact the electric toothbrush housing instead of the drive shaft, and then install the brush head and the drive shaft. When the brush head is installed on the driving shaft, the connecting column 22 is first inserted into the connecting groove 13 together with the second connecting plate 221. When it is pressed downward until it cannot be pressed, the second connecting plate 221 just moves below the first connecting plate 111, and the connecting column 22 is rotated so that the first positioning groove 14 is vertically connected to the second positioning groove 23. At this time, the second connecting plate 221 and the first connecting plate 111 just overlap and abut against each other, and then the force applied to the connecting column 22 is stopped. At this time, the second connecting plate 221 will be pushed to move in the direction of the first connecting plate 111 under the action of the elastic force of the spring 112 until the second connecting plate 221 overlaps and abuts against the first connecting plate 111, and the second limiting block 114 just fits into the limiting groove 222; when the brush head needs to be replaced, the connecting column 22 is pressed downward again so that the second limiting block 114 is disengaged from the limiting groove 222, and then the brush head is rotated so that the second connecting plate 221 moves between the two first connecting plates 111, and then the connecting column 22 is pulled out from the connecting groove 13. Through an electric toothbrush drive shaft and a brush head that matches it, the existing plug-in and pull-out connection method of the electric toothbrush drive shaft and the brush head is changed, so that a rotation operation is added while inserting, and the two are more tightly connected together while retaining the detachable installation of the drive shaft and the brush head, thereby reducing the probability of the brush head loosening on the drive shaft and further improving the cleaning accuracy and efficiency.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electric toothbrush drive shaft, characterized in that: The invention comprises a shaft body (1) with a hollow structure, wherein one end of the shaft body (1) is provided with a first connecting portion (11) for connecting to a toothbrush head, and the other end of the shaft body (1) is provided with a second connecting portion (12) for connecting to a mounting seat, and the shaft body (1) is provided with a shock absorbing device (3) for slowly releasing the vibration force generated by the shaft body (1) on the housing of an electric toothbrush, and one end of the shaft body (1) is provided with a connecting groove (13), and the first connecting portion (11) comprises a first connecting plate (111) fixedly connected to the inner wall of the connecting groove (13) at a horizontal interval, and a connecting space connected to the brush head is formed between the first connecting plate (111) and the inner wall of the connecting groove (13).

2. The electric toothbrush drive shaft according to claim 1, characterized in that: A first limiting member for limiting the up-and-down position of the brush head and a second limiting member for limiting the left-and-right position of the brush head are arranged in the connection groove (13).

3. The electric toothbrush drive shaft according to claim 2, characterized in that: The first limiting member comprises a spring (112) fixedly connected to the bottom of the connecting groove (13) and a first limiting block (113) fixedly connected to an end of the spring (112) away from the connecting groove (13).

4. The electric toothbrush drive shaft according to claim 3, characterized in that: The second limiting member comprises a second limiting block (114) fixedly connected to a side of the first connecting plate (111) facing the bottom of the connecting groove (13).

5. The electric toothbrush drive shaft according to claim 4, characterized in that: A first positioning groove (14) is provided on the outer side of the shaft body (1) corresponding to the connecting groove (13), and the first positioning groove (14) is vertically provided along the height direction of the shaft body (1).

6. The electric toothbrush drive shaft according to claim 1, characterized in that: The shock absorbing device (3) comprises a shock absorbing ball (31) fixedly connected to the shaft body (1) and located close to the first connecting portion (11); the shock absorbing ball (31) is made of a shock absorbing material.

7. The electric toothbrush drive shaft according to claim 1, characterized in that: The second connection portion (12) comprises a plug pin (121) fixedly connected to an end of the shaft body (1) away from the first connection portion (11), and an embedded block (122) is fixedly connected to the outer side of the plug pin (121).

8. A brush head applied to the electric toothbrush drive shaft according to claim 4 or 5, characterized in that: It comprises a brush head body (2), bristles (21) fixedly connected to one side of the brush head body (2), and a connecting column (22) fixedly connected to one end of the brush head body (2), wherein the connecting column (22) is used to be embedded in the connecting groove (13).

9. The brush head according to claim 8, characterized in that: Second connecting plates (221) are fixedly connected to the side walls of the connecting column (22) at horizontal intervals, and an embedding space for embedding a second connecting plate (221) is formed between two adjacent first connecting plates (111), and the second connecting plate (221) is abutted against the side of the first connecting plate (111) facing the bottom of the connecting groove (13), and a limiting groove (222) for embedding the second limiting block (114) is provided on the side of the second connecting plate (221) facing the brush head body (2).

10. The brush head according to claim 9, characterized in that: A second positioning groove (23) is provided on the outer side of the brush head body (2), and the second positioning groove (23) is vertically provided along the height direction of the brush head body (2).

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