Brush handle assembly of electric toothbrush and electric toothbrush

Abstract

The utility model provides a brush handle assembly of electric toothbrush and electric toothbrush, the brush handle assembly of electric toothbrush comprises brush handle shell, the front end of brush handle shell is provided with a through hole, the inside of brush handle shell is fixed with motor and brush head connecting piece, the front end of brush head connecting piece passes through the through hole and extends to the outside, and the brush head connecting piece is fixed on the brush handle shell. The front end of a main shaft of the motor penetrates through the brush head connecting piece and extends to the outside. The brush head connecting piece can be connected with a brush head support of the brush head, and a main shaft of the motor can be directly connected with a transmission rod in the brush head, so that the brush handle assembly can be matched with the brush head structure, moving around the axis of the transmission rod, of the transmission rod. The main shaft of the motor is directly connected with the transmission rod, transmission parts such as a gear assembly are omitted, assembly is simple, noise generated during transmission of the transmission parts is eliminated, noise generated when the toothbrush is used can be reduced, and meanwhile the rotating frequency of the brush disc can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of teeth cleaning, in particular to a brush handle assembly of an electric toothbrush and the electric toothbrush. Background Art

[0002] An electric toothbrush is a new type of teeth cleaning tool. Its working principle is to use a motor to drive the bristles to vibrate or swing left and right to clean teeth. It has the characteristics of strong cleaning ability, convenience and labor saving.

[0003] The Chinese invention application with publication number CN117582310A provides a rotating electric toothbrush brush head structure, including a brush rod, an elastic gasket, a brush disc and a transmission rod, wherein the front end of the brush rod is provided with a brush head seat; the lower end of the brush disc is provided with a guide column, which is rotatably inserted into the brush head seat, the elastic gasket is provided between the brush disc and the brush head seat, and a limiting structure is provided between the guide column and the brush head seat; a slide groove is provided on the outer wall of the guide column, the transmission rod is inserted into the brush rod, and a lever is provided at the front end of the transmission rod, which is inserted into the slide groove and connected to the guide column by transmission; a brush head bracket is provided at the rear end of the transmission rod, and the brush head bracket is inserted into the rear port of the brush rod and fixedly connected thereto. By assembling the brush rod of the brush head structure with the brush handle assembly, the brush disc is driven to rotate.

[0004] However, the main shaft of the motor of the existing brush handle assembly cannot be directly adapted to the brush head structure in which the transmission rod moves around its own axis. For example, the Chinese patent with publication number CN214679078U provides a gear transmission structure of a rotary electric toothbrush, which is provided with a motor and a transmission assembly, wherein the transmission assembly includes an output gear connected to the motor output shaft, a reduction gear meshed with the output gear, a brush disc mounted on the brush head, and a connecting rod assembly arranged between the reduction gear and the brush disc, wherein the output gear and the reduction gear are arranged axially vertically, and an eccentric gear shaft is arranged at the output end of the reduction gear, and one end of the connecting rod assembly is connected to the eccentric gear shaft, and the other end thereof is movably connected to the brush disc and drives the brush disc to rotate left and right. The gear transmission structure drives the connecting rod assembly to reciprocate linearly through the motor, and cannot be adapted to the brush head structure in which the transmission rod moves around its own axis. Moreover, the motor output shaft of the electric toothbrush is connected to the connecting rod assembly through the gear assembly, which is complex to assemble and makes a lot of noise when in use.

[0005] Therefore, the prior art still needs to be improved and developed. Utility Model Content

[0006] The purpose of the utility model is to provide a brush handle assembly and an electric toothbrush for an electric toothbrush in view of the defects and shortcomings of the prior art. The main shaft of the motor of the brush handle assembly can be adapted to the brush head structure in which the transmission rod moves around its own axis, eliminating transmission components such as gear assemblies, simplifying assembly, eliminating the noise generated by the transmission components during transmission, which is beneficial to reducing the noise of the toothbrush when in use, and at the same time can increase the rotation frequency of the brush disc.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] The utility model provides a brush handle assembly of an electric toothbrush, comprising a brush handle shell, a through hole being provided at the front end of the brush handle shell, a motor and a brush head connecting piece being fixed inside the brush handle shell, the front end of the brush head connecting piece passing through the through hole and extending to the outside, and the front end of the main shaft of the motor passing through the brush head connecting piece and extending to the outside.

[0009] Through the above-mentioned structural arrangement, the brush head connector can be connected to the brush head bracket of the brush head, and the main shaft of the motor can be directly connected to the transmission rod inside the brush head, so that the brush handle assembly can be adapted to the brush head structure in which the transmission rod moves around its own axis; and the main shaft of the motor is directly connected to the transmission rod, thereby eliminating transmission components such as gear assemblies, simplifying assembly, and eliminating the noise generated by the transmission components during transmission, which is beneficial to reducing the noise of the toothbrush when in use, and at the same time can increase the rotation frequency of the brush disc.

[0010] According to the above scheme, the motor is a magnetic suspension motor or a servo motor. The selection of a magnetic suspension motor can further reduce the noise during use; the selection of a servo motor makes the motor run smoothly and realizes the high-frequency rotation of the main shaft of the motor around the axis or the left and right reciprocating swing.

[0011] According to the above solution, a main control circuit board is also provided in the brush handle housing, and the main control circuit board is electrically connected to the motor. The main control circuit board is used to control the working state of the motor, such as controlling the switch of the motor, the forward or reverse rotation of the main shaft of the motor, the frequency of the reciprocating swing of the main shaft of the motor, etc.

[0012] According to the above solution, a mounting frame is also fixed in the brush handle housing, on which the motor, the main control circuit board and the battery are mounted, the main control circuit board is electrically connected to the battery, and the brush head connector is fixedly connected to the mounting frame. The above structural arrangement makes the brush handle assembly compact; and by mounting the battery, motor, etc. on the mounting frame and then assembling them into the brush handle housing, it is beneficial to improve assembly efficiency.

[0013] According to the above solution, the rear end of the brush handle shell is sealed with a tail cover, a charging coil is arranged inside the brush handle shell, the charging coil is fixed on the tail cover, and the charging coil is electrically connected to the main control circuit board.

[0014] Through the above-mentioned structural setting, the charging coil receives the electric energy from the wireless charging seat and charges the battery, thereby improving the convenience of use; the tail cover seals the brush handle shell to prevent water from entering the brush handle.

[0015] According to the above solution, it also includes a pressure sensing component for detecting the pressure on the brush plate, and the pressure sensing component is electrically connected to the main control circuit board.

[0016] Through the above-mentioned structural setting, the pressure sensing component detects the pressure on the brush plate in real time, and the main control circuit board adjusts the output power of the motor according to the pressure signal of the pressure sensing component; if the pressure of the brush plate is greater than the preset threshold during brushing, the output power of the motor is reduced, thereby protecting the user's gums.

[0017] According to the above solution, a light circuit board is also arranged in the brush handle housing, on which an LED light is arranged, and the light circuit board is electrically connected to the main control circuit board. Through the above structural arrangement, the working state of the LED light can be controlled to play an indicating role.

[0018] According to the above solution, a shaft sealing sleeve is sleeved on the main shaft, and the shaft sealing sleeve is fixed on the inner hole of the brush head connector. By arranging the shaft sealing sleeve between the brush head connector and the main shaft, the noise of the main shaft during operation can be reduced.

[0019] According to the above solution, a sealing component is sealed between the through hole and the brush head connector. By providing the sealing component, water can be effectively prevented from entering the brush handle housing.

[0020] The utility model also provides an electric toothbrush, comprising the above-mentioned brush handle assembly and brush head assembly, the brush head assembly comprising a brush rod, a brush disc and a transmission rod, a brush head seat is provided at the front end of the brush rod, the brush disc is rotatably arranged on the brush head seat, a brush head bracket is fixed at the rear end of the brush rod, the transmission rod is rotatably arranged in the brush rod and is transmission-connected with the brush disc; the brush head connector of the brush handle assembly is connected to the brush head bracket, and the main shaft of the brush handle assembly is connected to the transmission rod.

[0021] Through the above-mentioned structural arrangement, when the main shaft rotates around its own axis or swings left and right, it drives the transmission rod to rotate around its own axis or swing left and right, thereby driving the brush plate to move on the brush head seat.

[0022] The beneficial effects of the utility model are:

[0023] The utility model provides a brush handle shell in which a motor and a brush head connecting piece are fixed, the front end of the brush head connecting piece passes through the through hole and extends to the outside, and the front end of the main shaft of the motor passes through the brush head connecting piece and extends to the outside; the brush head connecting piece can be connected to the brush head bracket of the brush head, and the main shaft of the motor can be directly connected to the transmission rod inside the brush head, so that the brush handle assembly can be adapted to the brush head structure in which the transmission rod moves around its own axis; and the main shaft of the motor is directly connected to the transmission rod, thereby eliminating transmission components such as gear components, simplifying assembly, eliminating noise generated during transmission of the transmission components, and helping to reduce the noise of the toothbrush when in use, while increasing the rotation frequency of the brush disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the brush handle assembly in the utility model;

[0025] Figure 2 It is a schematic diagram of the structural decomposition of the brush handle assembly in the utility model;

[0026] Figure 3 It is a cross-sectional schematic diagram of the brush handle assembly in the utility model;

[0027] Figure 4 yes Figure 3 A magnified view of part A;

[0028] Figure 5 It is a structural schematic diagram of the electric toothbrush in the utility model;

[0029] Figure 6 It is a cross-sectional schematic diagram of the electric toothbrush in the utility model;

[0030] Figure 7 yes Figure 6 A magnified view of part B;

[0031] Figure 8 It is a schematic diagram of the structural decomposition of the brush head assembly in the utility model.

[0032] In the figure: 1. brush handle shell; 11. through hole; 12. tail cover; 121. charging coil; 2. brush head connector; 21. sealing assembly; 3. motor; 31. main shaft; 311. shaft sealing sleeve; 4. battery; 5. mounting bracket; 6. main control circuit board; 61. pressure sensing assembly; 62. light circuit board; 7. brush rod; 71. brush head seat; 72. brush head bracket; 8. brush disc; 9. transmission rod. DETAILED DESCRIPTION

[0033] The technical solution of the utility model is described below in conjunction with the accompanying drawings and embodiments.

[0034] like Figure 1-4As shown, the utility model provides a brush handle assembly of an electric toothbrush, including a brush handle shell 1, a through hole 11 is provided at the front end of the brush handle shell 1, a motor 3 and a brush head connector 2 are fixed in the brush handle shell 1, the front end of the brush head connector 2 passes through the through hole 11 and extends to the outside, and the front end of the main shaft 31 of the motor 3 passes through the brush head connector 2 and extends to the outside.

[0035] Through the above-mentioned structural arrangement, the brush head connector 2 can be connected to the brush head bracket 72 of the brush head, and the main shaft 31 of the motor 3 can be directly connected to the transmission rod 9, so that the brush handle assembly can be adapted to the brush head structure in which the transmission rod 9 moves around its own axis; and the main shaft 31 of the motor 3 is directly connected to the transmission rod 9 inside the brush head, eliminating transmission components such as gear assemblies, simplifying assembly, eliminating the noise generated by the transmission components during transmission, which is beneficial to reducing the noise of the toothbrush when in use, and at the same time can increase the rotation frequency of the brush plate 8.

[0036] Furthermore, the motor 3 is a magnetic suspension motor or a servo motor. The use of a magnetic suspension motor can further reduce noise during use; the use of a servo motor can make the motor run smoothly and realize high-frequency rotation or left-right reciprocating swing of the main shaft 31 of the motor 3 around the axis.

[0037] Furthermore, a main control circuit board 6 is also disposed in the brush handle housing 1, and the main control circuit board 6 is electrically connected to the motor 3. The main control circuit board 6 is used to control the working state of the motor 3, such as controlling the switch of the motor 3, the forward or reverse rotation of the main shaft 31 of the motor 3, the frequency of the reciprocating swing of the main shaft 31 of the motor 3, etc.

[0038] Furthermore, a mounting frame 5 is fixed in the brush handle housing 1, and the motor 3, the main control circuit board 6 and the battery 4 are mounted on the mounting frame 5. The main control circuit board 6 is electrically connected to the battery 4, and the brush head connector 2 is fixedly connected to the mounting frame 5. The above-mentioned structural arrangement makes the structure of the brush handle assembly compact; and by mounting the battery 4, the motor 3, etc. on the mounting frame 5 and then assembling them into the brush handle housing 1, it is beneficial to improve the assembly efficiency.

[0039] Furthermore, the rear end of the brush handle housing 1 is sealed with a tail cover 12 , a charging coil 121 is provided in the brush handle housing 1 , the charging coil 121 is fixed on the tail cover 12 , and the charging coil 121 is electrically connected to the main control circuit board 6 .

[0040] Through the above-mentioned structural setting, the charging coil 121 receives the electric energy from the wireless charging seat and charges the battery 4, thereby improving the convenience of use; the tail cover 12 seals the brush handle housing 1 to prevent water from entering the brush handle.

[0041] Furthermore, it also includes a pressure sensing component 61 for detecting the pressure on the brush plate 8 , and the pressure sensing component 61 is electrically connected to the main control circuit board 6 .

[0042] Through the above-mentioned structural setting, the pressure sensing component 61 detects the pressure on the brush plate 8 in real time, and the main control circuit board 6 adjusts the output power of the motor 3 according to the pressure signal of the pressure sensing component 61; if the pressure of the brush plate 8 is greater than the preset threshold during brushing, the output power of the motor 3 is reduced, thereby protecting the user's gums.

[0043] Furthermore, a light circuit board 62 is also provided in the brush handle housing 1, and an LED light is provided on the light circuit board 62, and the light circuit board 62 is electrically connected to the main control circuit board 6. Through the above-mentioned structural arrangement, the working state of the LED light is controlled to play an indicating role.

[0044] Furthermore, the main shaft 31 is sleeved with a shaft sealing sleeve 311, and the shaft sealing sleeve 311 is fixed to the inner hole of the brush head connector 2. By providing the shaft sealing sleeve 311 between the brush head connector 2 and the main shaft 31, the noise of the main shaft 31 during operation can be reduced.

[0045] Furthermore, a sealing component 21 is sealed between the through hole 11 and the brush head connector 2. By providing the sealing component 21, water is effectively prevented from entering the brush handle housing 1.

[0046] like Figure 5-8 As shown, the utility model also provides an electric toothbrush, including the above-mentioned brush handle assembly and brush head assembly, the brush head assembly including a brush rod 7, a brush disc 8 and a transmission rod 9, a brush head seat 71 is provided at the front end of the brush rod 7, the brush disc 8 is rotatably arranged on the brush head seat 71, a brush head bracket 72 is fixed to the rear end of the brush rod 7, the transmission rod 9 is rotatably arranged in the brush rod 7 and is transmission-connected to the brush disc 8; the brush head connector 2 of the brush handle assembly is connected to the brush head bracket 72, and the main shaft 31 of the brush handle assembly is connected to the transmission rod 9.

[0047] Through the above-mentioned structural arrangement, when the main shaft 31 rotates around its own axis or swings left and right, it drives the transmission rod 9 to rotate around its own axis or swing left and right, thereby driving the brush plate 8 to move on the brush head seat 71.

[0048] When the electric toothbrush of the present invention is in use, the brush head connector 2 is connected to the brush head bracket 72, the main shaft 31 of the brush handle assembly is connected to the transmission rod 9, and the main control circuit board 6 controls the motor 3 to start, thereby controlling the main shaft 31 of the motor 3 to rotate around its own axis or swing left and right. Driven by the main shaft 31, the transmission rod 9 in the brush rod 7 rotates around its own axis or swings left and right, and the brush plate 8 moves on the brush head seat 71 under the transmission action of the transmission rod 9.

[0049] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A handle assembly of an electric toothbrush, comprising a handle housing, wherein a through hole is provided at the front end of the handle housing, wherein: A motor and a brush head connector are fixed in the brush handle housing, a front end of the brush head connector passes through the through hole and extends to the outside, and a front end of the main shaft of the motor passes through the brush head connector and extends to the outside.

2. The handle assembly of the electric toothbrush according to claim 1, characterized in that: The motor is a magnetic suspension motor or a servo motor.

3. The handle assembly of the electric toothbrush according to claim 1, characterized in that: A main control circuit board is also arranged in the brush handle housing, and the main control circuit board is electrically connected to the motor.

4. The handle assembly of the electric toothbrush according to claim 3, characterized in that: A mounting frame is also fixed in the brush handle housing, and the motor, the main control circuit board and the battery are mounted on the mounting frame. The main control circuit board is electrically connected to the battery, and the brush head connector is fixedly connected to the mounting frame.

5. The handle assembly of the electric toothbrush according to claim 4, characterized in that: The rear end of the brush handle shell is sealed with a tail cover, a charging coil is arranged in the brush handle shell, the charging coil is fixed on the tail cover, and the charging coil is electrically connected to the main control circuit board.

6. The handle assembly of the electric toothbrush according to claim 3, characterized in that: It also includes a pressure sensing component for detecting the pressure on the brush plate, and the pressure sensing component is electrically connected to the main control circuit board.

7. The handle assembly of the electric toothbrush according to claim 3, characterized in that: A light circuit board is also arranged in the brush handle housing, on which an LED light is arranged, and the light circuit board is electrically connected to the main control circuit board.

8. The handle assembly of the electric toothbrush according to claim 1, characterized in that: A shaft sealing sleeve is sleeved on the main shaft, and the shaft sealing sleeve is fixed on the inner hole of the brush head connecting piece.

9. The handle assembly of the electric toothbrush according to claim 1, characterized in that: A sealing component is sealed between the through hole and the brush head connector.

10. An electric toothbrush, characterized in that: It comprises the brush handle assembly and brush head assembly as described in any one of claims 1-9, the brush head assembly comprises a brush rod, a brush disc and a transmission rod, a brush head seat is provided at the front end of the brush rod, the brush disc is rotatably arranged on the brush head seat, a brush head holder is fixed at the rear end of the brush rod, the transmission rod is rotatably arranged in the brush rod and is transmission-connected to the brush disc; the brush head connector of the brush handle assembly is connected to the brush head holder, and the main shaft of the brush handle assembly is connected to the transmission rod.

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