Electric toothbrush

Abstract

The present invention relates to an electric toothbrush, comprising a toothbrush head, a toothbrush handle, a transmission rod, a vibration motor, a control panel and a battery, wherein the control panel and the battery are both arranged in the toothbrush handle, the transmission rod comprises an exposed part and a built-in part, a perforation is arranged at the upper end of the toothbrush handle, the exposed part passes through the perforation and extends out of the toothbrush handle, the exposed part extends out of the toothbrush handle and is detachably connected to the toothbrush head, the built-in part is located in the toothbrush handle and is connected to the toothbrush handle, the control panel is mounted on the built-in part, the vibration motor is mounted in the inner cavity of the exposed part, and the vibration motor and the battery are both electrically connected to the control panel. The present invention has the advantages of simple assembly structure, convenient disassembly and assembly, more stable fixing of the transmission rod, effective reduction of vibration of the toothbrush handle, not easy to be damaged, and high reliability in use.

Description

Technical Field

[0001] The invention relates to a toothbrush, in particular to an electric toothbrush. Background Art

[0002] A toothbrush is the most commonly used tooth cleaning appliance for people. It is used to remove bacteria, plaque and small debris attached between teeth, and can prevent periodontal diseases and protect people's oral hygiene and dental health. At present, electric toothbrushes on the market generally include a toothbrush head, a toothbrush handle, a transmission rod, a vibration motor, a control panel and a battery. The toothbrush head is connected to the upper part of the transmission rod, the lower part of the transmission rod is connected to the toothbrush handle, the vibration motor is assembled in the inner cavity of the transmission rod, and the control panel and the battery are assembled in the inner cavity of the toothbrush handle. The electric toothbrush of the above structure mainly has the following shortcomings: not only the assembly structure of the transmission rod, the control panel and other components is complicated, but also the disassembly and assembly is very troublesome, which is not conducive to the later maintenance, and the use noise is relatively large. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an electric toothbrush with a simple assembly structure, convenient assembly and disassembly, more stable fixing of the transmission rod, effective reduction of vibration of the toothbrush handle, not easy to be damaged, and high reliability in use.

[0004] In order to solve the above technical problems, the present invention provides an electric toothbrush with the following structure: including a toothbrush head, a toothbrush handle, a transmission rod, a vibration motor, a control board and a battery, wherein the control board and the battery are both arranged in the toothbrush handle, wherein the transmission rod includes an exposed part and a built-in part, a through hole is provided at the upper end of the toothbrush handle, the exposed part passes through the through hole and extends out of the toothbrush handle, the exposed part extends out of the toothbrush handle and is detachably connected to the toothbrush head, the built-in part is located in the toothbrush handle and is connected to the toothbrush handle, the control board is installed on the built-in part, the vibration motor is installed in the inner cavity of the exposed part, and the vibration motor and the battery are both electrically connected to the control board.

[0005] After adopting the above structure, compared with the prior art, the present invention has the following advantages: 1. Since the control board of the present application is installed on the built-in part of the transmission rod, and the vibration motor is installed on the exposed part of the transmission rod, compared with the prior art, the present application only uses one part of the transmission rod, that is, it can achieve the purpose of fixing the vibration motor and the control board, which previously required multiple parts to be set, thereby greatly reducing the number of parts of the entire electric toothbrush and simplifying the assembly structure; 2. Since the control board needs to be installed, the built-in part of the transmission rod must be extended to provide a position for installing the control board, then the length of the built-in part will be longer, the volume will be larger, and the weight will be heavier. In this way, when the exposed part of the transmission rod vibrates, the built-in part not only has a smaller swing amplitude under the limiting effect of the toothbrush handle, but also has a smaller vibration, so that the transmission The connection between the moving rod and the toothbrush handle is more stable, and the connection reliability is greatly increased. In addition, the vibration of the toothbrush handle can be greatly reduced, and the comfort of using the electric toothbrush is improved; 3. Since the exposed part and the built-in part of the transmission rod are an integral whole, and the connection between the built-in part and the toothbrush handle is more stable, when the exposed part is subjected to external force (such as disassembling the toothbrush head), under the support of the built-in part, the exposed part will not be easy to loosen, so that the electric toothbrush is less likely to be damaged and has higher reliability in use; 4. When assembling the electric toothbrush, the vibration motor and the control board can be installed on the transmission rod first, and then the transmission rod is connected to the toothbrush handle. When the transmission rod is removed from the toothbrush handle, the control board and the vibration motor can also be removed at the same time, so that the disassembly and assembly of the electric toothbrush becomes more convenient, which is convenient for later maintenance. In summary, the electric toothbrush of the present invention not only has a simple assembly structure and is easy to disassemble and assemble, but also the transmission rod is more firmly fixed, which can effectively reduce the vibration of the toothbrush handle, is not easy to be damaged, and has high reliability in use.

[0006] The electric toothbrush of the present invention has a wall thickness of the exposed portion that is smaller than a wall thickness of the built-in portion.

[0007] The above structure can make the wall thickness of the exposed part of the transmission rod thinner, so that the transmission rod can more efficiently transmit the vibration of the vibration motor to the toothbrush head, making it easier for the toothbrush head to vibrate, thereby improving the cleaning efficiency of the electric toothbrush.

[0008] In the electric toothbrush of the present invention, the wall thickness of the exposed portion gradually increases along the axis direction of the transmission rod starting from the free end of the exposed portion.

[0009] The free end of the exposed part of the transmission rod is closest to the bristles of the toothbrush head. Therefore, the thinner the free end of the exposed part is, the easier it is for the toothbrush head to vibrate, and the higher the cleaning efficiency of the electric toothbrush is. The wall thickness of the exposed part gradually becomes thicker along the axial direction of the transmission rod starting from the free end of the exposed part, which not only ensures the structural strength of the exposed part, but also ensures the structural strength of the junction between the exposed part and the built-in part.

[0010] In the electric toothbrush of the present invention, at least a portion of the circumferential outer side wall of the built-in part is in contact with or in contact with the inner cavity side surface of the toothbrush handle, and the contact or in contact is used to laterally limit the built-in part.

[0011] The above structure not only increases the contact area between the built-in part and the toothbrush handle, so that the built-in part can be better supported by the toothbrush handle, thereby making the connection between the transmission rod and the toothbrush handle more stable, and the connection reliability is greatly improved, but also when the exposed part vibrates, it can prevent the built-in part from moving laterally in the inner cavity of the toothbrush handle, that is, it effectively eliminates the swinging of the built-in part in the inner cavity of the toothbrush handle, and further reduces the vibration of the built-in part, thereby further making the connection between the transmission rod and the toothbrush handle more stable, and the connection reliability is greatly improved, and at the same time it can also greatly reduce the vibration of the toothbrush handle, thereby improving the comfort of using the electric toothbrush.

[0012] The electric toothbrush described in the present invention, wherein the transmission rod is divided into a hollow rod body and a groove body with a radial opening along the toothbrush handle, the rod body part extending outside the toothbrush handle forms an exposed part, the rod body part and the groove body located inside the toothbrush handle form a built-in part, the vibration motor is installed in the inner cavity of the rod body part extending outside the toothbrush handle, and the control board is installed on the groove body.

[0013] The above structure can not only ensure the structural strength of the exposed part, but also effectively avoid the occurrence of breakage at the connection between the rod body and the slot body; in addition, the structure of the slot body is more convenient for installing the control panel, thereby making the assembly structure of the electric toothbrush simpler and more convenient for disassembly and assembly.

[0014] The electric toothbrush of the present invention further comprises a support rod, one end of which is connected to the groove body, and the other end of the support rod extends into the inner cavity of the rod body to support the vibration motor.

[0015] The above structure not only makes it easy to fix the vibration motor, but also makes it unnecessary to increase the wall thickness of the rod body including the exposed part to support the vibration motor. In other words, the wall thickness of the exposed part can be further reduced, so that the transmission rod can more efficiently transmit the vibration of the vibration motor to the toothbrush head, making it easier for the toothbrush head to vibrate, thereby improving the cleaning efficiency of the electric toothbrush.

[0016] In the electric toothbrush of the present invention, a first buffer is provided between the vibration motor and the support rod.

[0017] The provision of the first buffer member avoids direct contact between the support rod and the vibration motor, thereby achieving a noise-reducing and vibration-reducing effect, thereby not only greatly reducing the noise generated when the electric toothbrush is used, but also effectively reducing the vibration of the toothbrush handle, thereby improving the comfort of using the electric toothbrush.

[0018] In the electric toothbrush of the present invention, the support rod is isolated from the inner cavity side wall of the rod body by at least one second buffer member.

[0019] The provision of the second buffer member avoids direct contact between the support rod and the inner cavity side wall of the rod body, thereby playing a role in silencing and reducing vibration, thereby not only greatly reducing the noise generated when the electric toothbrush is used, but also effectively reducing the vibration of the toothbrush handle, thereby improving the comfort of using the electric toothbrush.

[0020] The electric toothbrush of the present invention further comprises a buffer ring, a support step is provided at the lower part of the support rod, a support surface is provided on the transmission rod, the buffer ring is sleeved on the support rod and pressed between the support step and one end of the rod body.

[0021] The setting of the buffer ring can avoid direct contact between the lower part of the support rod and one end of the rod body, thereby playing a role in silencing and reducing vibration, which can not only greatly reduce the noise generated when the electric toothbrush is used, but also effectively reduce the vibration of the toothbrush handle and improve the comfort of using the electric toothbrush.

[0022] The electric toothbrush described in the present invention is characterized in that the support rod is clamped with the groove body, and the clamping connection includes at least one second buckle and a second clamping groove matching with the second buckle, and the buffer ring sheet is pressed between the support step and one end of the rod body through the clamping connection.

[0023] The above-mentioned clamping structure not only facilitates the disassembly and assembly of the support rod and the transmission rod, but also directly fixes the buffer ring sheet, thereby making the assembly structure of the electric toothbrush simpler and the disassembly and assembly more convenient.

[0024] The electric toothbrush described in the present invention, wherein the toothbrush handle includes an upper handle body and a lower handle body that are detachably connected, the lower handle body is equipped with a battery, the upper end of the upper handle body is provided with a through hole, the transmission rod is inserted into the upper handle body from bottom to top, the part of the transmission rod that passes through the through hole and extends outside the upper handle body is the exposed part, and the rest serves as the built-in part and is located in the upper handle body.

[0025] The toothbrush handle adopts a detachable connection structure of the upper handle body and the lower handle body, which not only facilitates the disassembly and assembly of the transmission rod and the upper handle body, but also facilitates the replacement of batteries and facilitates the later maintenance of the electric toothbrush.

[0026] The electric toothbrush of the present invention has an electrical connection structure between the built-in part and the battery, and the electrical connection structure is used to achieve a detachable electrical connection between the control panel and the battery.

[0027] The above structure facilitates the disassembly and assembly between the control board and the battery during the battery replacement process, making battery replacement more convenient.

[0028] The electric toothbrush described in the present invention, wherein the electrical connection structure includes a positive copper sheet, a negative copper sheet, a connecting copper sheet and a battery cover, the battery cover is connected to the upper end of the battery, the negative copper sheet is connected to the battery cover and is electrically connected to the negative electrode of the battery, the connecting copper sheet is located in the upper handle body and is connected to the built-in part, the connecting copper sheet is electrically connected to the control board, the lower end of the connecting copper sheet is pressed against the negative copper sheet, the positive copper sheet is connected to the lower end of the built-in part and is electrically connected to the control board, the lower end of the positive copper sheet is connected to a spring, the lower end of the spring is pressed against the positive electrode of the battery, and the positive copper sheet is electrically connected to the positive electrode of the battery through the spring.

[0029] The above-mentioned electrical connection structure is not only convenient for disassembly and assembly of the upper handle body and the lower handle body, and convenient for replacing batteries, but also the positive copper sheet and the connecting copper sheet are connected to the built-in part, so that the positive copper sheet and the connecting copper sheet can be disassembled and assembled together with the transmission rod, thereby further simplifying the assembly structure of the electric toothbrush, making the disassembly and assembly of the electric toothbrush more convenient, and facilitating the later maintenance of the electric toothbrush.

[0030] The electric toothbrush of the present invention, wherein the built-in part is snap-connected with the upper handle body, and the snap-connection includes at least one first snap buckle and a first snap groove matched with the first snap buckle.

[0031] The above-mentioned detachable connection structure between the upper handle body and the lower handle body is not only simple in structure and easy to assemble and disassemble, but also when the lower handle body is disassembled (such as replacing the battery), the transmission rod can be fixed on the upper handle body without being separated from the upper handle body.

[0032] The electric toothbrush described in the present invention also includes an elastic sealing pad, which is sleeved on the upper end of the built-in part. An annular step is provided on the outer peripheral wall of the built-in part. The elastic sealing pad is pressed between the upper end of the annular step and the top of the inner cavity of the toothbrush handle at the perforated lower end.

[0033] The provision of the elastic sealing pad not only effectively enhances the dustproof and waterproof effects of the perforation, but also avoids direct contact between the upper end of the built-in part and the toothbrush handle, thereby playing a role in silencing and vibration reduction, thereby not only greatly reducing the noise generated when the electric toothbrush is used, but also effectively reducing the vibration of the toothbrush handle, thereby improving the comfort of using the electric toothbrush. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the electric toothbrush of the present invention;

[0035] Figure 2 is along Figure 1 Schematic cross-sectional view of the AA line;

[0036] Figure 3 yes Figure 2 A right side cross-sectional schematic diagram of

[0037] Figure 4 yes Figure 2 An enlarged schematic diagram of part I;

[0038] Figure 5 yes Figure 3 The enlarged schematic diagram of the middle J part;

[0039] Figure 6 is along Figure 2 Schematic cross-sectional view of the middle BB line;

[0040] Figure 7 It is a schematic diagram of the three-dimensional structure of the upper handle of the electric toothbrush of the present invention;

[0041] Figure 8 An exploded schematic diagram of some parts of the electric toothbrush of the present invention;

[0042] Fig. 9 is an exploded schematic diagram of a toothbrush handle in the electric toothbrush of the present invention;

[0043] Fig.10 It is an exploded schematic diagram of the assembly of the negative electrode copper sheet, the battery cover and the battery in the electric toothbrush of the present invention;

[0044] Fig.11 It is a schematic diagram of the three-dimensional structure of the connecting copper sheets in the electric toothbrush of the present invention.

[0045] Description of the accompanying drawings: 1. toothbrush head; 2. transmission rod; 3. vibration motor; 4. control board; 5. battery; 6. elastic sealing pad; 7. positive copper sheet; 8. negative copper sheet; 9. connecting copper sheet; 10. battery cover; 11. support rod; 12. buffer ring; 13. upper handle body; 14. lower handle body; 15. perforation; 16. convex rod; 17. first wire; 18. first buckle; 19. first slot; 20. plug-in block; 21. plug-in sheet; 22. slide slot; 23. insertion port; 24. sealing ring; 25. annular step; 26. sealing sleeve; 27. annular convex ring; 2 8. Spring; 29. ​​Through hole; 30. Raised edge; 31. Limiting step; 32. Positioning boss; 33. Clip; 34. Elastic contact; 35. Fixed slot; 36. Mounting slot; 37. Connecting piece; 38. Second wire; 39. Connecting column; 40. Connecting hole; 41. First buffer; 42. Second buffer; 43. Second buckle; 44. Second slot; 45. Supporting step; 46. Sleeve; 47. Limiting protrusion; 48. Limiting hole; 49. Elastic sleeve; 50. Limiting slot; 51. Limiting boss; 52. Rod body; 53. Slot body; 54. Limiting rod. DETAILED DESCRIPTION

[0046] The electric toothbrush of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] In the description of the present invention, unless otherwise specified, the terms "up", "down", "left", "right", "front", "back", "top", "bottom", etc. indicate positions or state relationships based on the positions or state relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred mechanism or component must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] like Figures 1 to 11 As shown, the electric toothbrush of the present invention comprises a toothbrush head 1, a toothbrush handle, a transmission rod 2, a vibration motor 3, a control board 4 and a battery 5. The control board 4 and the battery 5 are both arranged in the toothbrush handle. The transmission rod 2 comprises an exposed portion and a built-in portion. A through hole 15 is provided at the upper end of the toothbrush handle. The exposed portion extends out of the toothbrush handle through the through hole 15 and is detachably connected to the toothbrush head 1. The built-in portion is located in the toothbrush handle and is connected to the toothbrush handle. The control board 4 is mounted on the built-in portion, and the vibration motor 3 is mounted in the inner cavity of the exposed portion. The vibration motor 3 and the battery 5 are both electrically connected to the control board 4. The control board 4 in this embodiment is electrically connected to the vibration motor 3 through two first wires 17.

[0050] The control panel 4 can be a simple control button, or a combination of a circuit board and a control button for adjusting the operation of the vibration motor 3 (such as rotation speed, rotation time, etc.). These are all existing conventional technologies and will not be described in detail here.

[0051] The transmission rod 2 is divided into a hollow rod body 52 and a groove body 53 with a radial opening along the toothbrush handle. The part of the rod body 52 extending outside the toothbrush handle forms an exposed part, and the part of the rod body 52 and the groove body 53 located inside the toothbrush handle form a built-in part. This structure can not only ensure the structural strength of the exposed part, but also effectively avoid the occurrence of breakage at the connection between the rod body 52 and the groove body 53.

[0052] The rod body 52 is generally in a conical shape that is smaller at the top and larger at the bottom. This structure can not only further ensure the structural strength of the exposed portion, but also facilitate the insertion of the rod body 52 into the through hole 15 from bottom to top.

[0053] The vibration motor 3 is installed in the inner cavity of the rod body 52 extending outside the toothbrush handle, and the control board 4 is installed on the groove body 53. The structure of the groove body 53 is more convenient for installing the control board 4, thereby making the assembly structure of the electric toothbrush simpler and more convenient for disassembly and assembly.

[0054] The electric toothbrush of the present invention also includes a support rod 11, the lower end of the support rod 11 is connected to the groove body 53, and the upper end of the support rod 11 extends into the inner cavity of the rod body 52 to support the vibration motor 3. This structure not only facilitates the fixation of the vibration motor 3, but also enables the rod body 52 to maintain a thinner wall thickness, so that the transmission rod 2 can more efficiently transmit the vibration of the vibration motor 3 to the toothbrush head 1, making it easier for the toothbrush head 1 to vibrate, thereby improving the cleaning efficiency of the electric toothbrush.

[0055] A first buffer member 41 is provided between the vibration motor 3 and the support rod 11, and the first buffer member 41 can be made of elastic materials such as rubber and silicone. The setting of the first buffer member 41 avoids direct contact between the support rod 11 and the vibration motor 3, and plays a role in silencing and reducing vibration, thereby not only greatly reducing the noise generated when the electric toothbrush is used, but also effectively reducing the vibration of the toothbrush handle, thereby improving the comfort of using the electric toothbrush.

[0056] The support rod 11 is isolated from the inner cavity side wall of the rod body 52 by at least one second buffer component 42. In the present embodiment, there are two second buffer components 42, one of which is close to the upper end of the support rod 11, and the other is located at the lower end of the inner cavity side wall of the rod body 52. ​​This can ensure that the support rod 11 is completely isolated from the inner cavity side wall of the rod body 52. ​​The first buffer component 42 can be made of elastic materials such as rubber and silicone. The provision of the second buffer component 42 avoids direct contact between the support rod 11 and the inner cavity side wall of the rod body 52, and plays a role in silencing and vibration reduction, thereby not only greatly reducing the noise generated when the electric toothbrush is used, but also effectively reducing the vibration of the toothbrush handle, thereby improving the comfort of using the electric toothbrush.

[0057] The two second buffer members 42 are clamped on the support rod 11 , so that the two second buffer members 42 can be assembled and disassembled together with the support rod 11 .

[0058] The electric toothbrush of the present invention also includes a buffer ring sheet 12. A support step 45 is provided at the lower part of the support rod 11. The buffer ring sheet 12 is sleeved on the support rod 11 and is pressed between the support step 45 and one end of the rod body 52. ​​The buffer ring sheet 12 can be made of rubber, silicone or other materials. The setting of the buffer ring sheet 12 can avoid direct contact between the lower part of the support rod 11 and the lower end of the rod body 52, thereby playing a role in silencing and reducing vibration, thereby not only greatly reducing the noise generated when the electric toothbrush is used, but also effectively reducing the vibration of the toothbrush handle, thereby improving the comfort of using the electric toothbrush.

[0059] The buffer ring piece 12 is tightly sleeved on the support rod 11 , so that the buffer ring piece 12 can be disassembled and assembled together with the support rod 11 .

[0060] The support rod 11 is clamped with the groove body 53, and the clamping connection includes at least one second clamp 43 and a second clamping groove 44 matching the second clamp 43. The buffer ring piece 12 is pressed between the support step 45 and one end of the rod body 52 through the clamping connection; in the present embodiment, the number of the second clamps 43 is two, and they are symmetrically arranged at the lower ends of both sides of the outer wall of the support rod 11, and the second clamping groove 44 is arranged at the corresponding position of the upper end of the groove body 53. The above-mentioned clamping structure not only facilitates the disassembly and assembly of the support rod 11 and the transmission rod 2, but also directly fixes the buffer ring piece 12, thereby making the assembly structure of the electric toothbrush simpler and the disassembly and assembly more convenient.

[0061] The second clamping groove 44 penetrates through the side wall of the groove body 53 , so that the second buckle 43 can be easily separated from the second clamping groove 44 , thereby further facilitating the disassembly and assembly of the support rod 11 and the transmission rod 2 .

[0062] The wall thickness of the exposed part is thinner than that of the built-in part, and the wall thickness of the exposed part gradually thickens along the axial direction of the transmission rod 2 from the free end of the exposed part. In the present embodiment, the transmission rod 2 gradually thins from the lower end of the rod body 52 from bottom to top. The above structure can not only make the wall thickness of the exposed part of the transmission rod 2 thinner, so that the transmission rod 2 can more efficiently transmit the vibration of the vibration motor 3 to the toothbrush head 1, making the toothbrush head 1 easier to vibrate, thereby improving the cleaning efficiency of the electric toothbrush, but also because the upper end of the exposed part of the transmission rod 2 is closest to the bristles of the toothbrush head 1, the thinner the free end of the exposed part is, the easier it is for the toothbrush head 1 to vibrate, and the cleaning efficiency of the electric toothbrush is higher; and the wall thickness of the lower end of the rod body 52 is thicker, which can ensure the connection strength between the rod body 52 and the groove body 53.

[0063] Of course, in order to better limit the vibration motor 3 in the upward direction, a step-like structure can be provided at the upper end of the inner cavity of the rod body 52, so the thickness of the rod body 52 at the step-like structure can be appropriately thickened.

[0064] At least a portion of the circumferential outer wall of the built-in part is in contact with or in contact with the inner cavity side of the toothbrush handle, and the contact or contact is used to limit the lateral position of the built-in part. In this embodiment, axial protrusions 16 are provided on the outer sides of the two side walls of the groove body 53, and the free ends of the two protrusions 16 and the rear ends of the two side walls of the groove body 53 are in contact with the inner cavity side wall of the toothbrush handle. Two limiting rods 54 for limiting the forward movement of the protrusions 16 are axially provided on the inner cavity side wall of the toothbrush handle. The above structure not only increases the contact area between the built-in part and the toothbrush handle, but also makes the built-in part The exposed part can be better supported by the toothbrush handle, thereby making the connection between the transmission rod 2 and the toothbrush handle more stable, and the connection reliability is greatly increased, and when the exposed part vibrates, the built-in part can be prevented from moving laterally in the inner cavity of the toothbrush handle, that is, the swinging of the built-in part in the inner cavity of the toothbrush handle is effectively eliminated, and the vibration of the built-in part is further reduced, thereby further making the connection between the transmission rod 2 and the toothbrush handle more stable, and the connection reliability is greatly increased, and at the same time, the vibration of the toothbrush handle can be greatly reduced, thereby improving the comfort of using the electric toothbrush.

[0065] The toothbrush handle comprises an upper handle body 13 and a lower handle body 14 which are detachably connected. The lower handle body 14 is provided with a battery 5. A through hole 15 is provided at the upper end of the upper handle body 13. A limit rod 54 is provided on the upper handle body 13, and the built-in part is located inside the upper handle body 13. The toothbrush handle adopts a detachable connection structure of the upper handle body 13 and the lower handle body 14, which is not only convenient for disassembly and assembly of the transmission rod 2 and the upper handle body 13, but also convenient for replacement of the battery 5, thereby facilitating the later maintenance of the electric toothbrush.

[0066] In this embodiment, at least one protruding plug block 20 is provided on the upper portion of the inner peripheral wall of the lower handle body 14, preferably two, and the two plug blocks 20 are evenly arranged on the inner peripheral wall of the lower handle body 14 in the circumferential direction, and an annular plug sheet 21 is provided at the lower end of the upper handle body 13, and at least one slide groove 22 is provided on the side wall of the plug sheet 21. The upper end of the lower handle body 14 is open, and the upper portion of the lower handle body 14 is sleeved on the plug sheet 21 from bottom to top. The plug block 20 is located in the corresponding slide groove 22. When the lower handle body 14 rotates circumferentially relative to the upper handle body 13, the plug block 20 can slide in the slide groove 22, and the lower end of one side of the slide groove 22 is provided with an insertion port 23 for the plug block 20 to enter. The above-mentioned detachable connection structure of the upper handle body 13 and the lower handle body 14 is not only simple in structure, but also does not require the upper handle body 13 and the lower handle body 14 to be fixed with fasteners, and is easy to disassemble and assemble, which is convenient for the later maintenance of the electric toothbrush.

[0067] An electrical connection structure is provided between the built-in part and the battery 5, and the electrical connection structure is used to realize a detachable electrical connection between the control board and the battery 5. This structure facilitates the disassembly and assembly between the control board and the battery during the battery replacement process, making the battery replacement more convenient.

[0068] The electrical connection structure includes a positive copper sheet 7, a negative copper sheet 8, a connecting copper sheet 9 and a battery cover 10. The battery cover 10 is connected to the upper end of the battery 5. The negative copper sheet 8 is connected to the battery cover 10 and is electrically connected to the negative electrode of the battery 5. The connecting copper sheet 9 is located in the upper handle body 13 and is connected to the built-in part. The connecting copper sheet 9 is electrically connected to the control board 4. The lower end of the connecting copper sheet 9 is pressed against the negative copper sheet 8. The positive copper sheet 7 is connected to the lower end of the built-in part and is electrically connected to the control board 4. The lower end of the positive copper sheet 7 is connected to a spring 28, and the lower end of the spring 28 is pressed against the electric On the positive electrode of the battery 5, the positive copper sheet 7 is electrically connected to the positive electrode of the battery 5 through a spring 28, and a through hole 29 is provided on the battery cover 10 for the spring 28 to pass through; the above-mentioned electrical connection structure is not only convenient for the disassembly and assembly of the upper handle body 13 and the lower handle body 14, and convenient for replacing the battery 5, but also the positive copper sheet 7 and the connecting copper sheet 9 are connected to the built-in part, so that the positive copper sheet 7 and the connecting copper sheet 9 can be disassembled and assembled together with the transmission rod 2, thereby further simplifying the assembly structure of the electric toothbrush, making the disassembly and assembly of the electric toothbrush more convenient, and facilitating the later maintenance of the electric toothbrush.

[0069] In this embodiment, a fixing slot 35 is provided at the lower end of the slot body 53, and the positive copper sheet 7 is inserted into the fixing slot 35. The positive copper sheet 7 and the transmission rod 2 are not only simple in assembly structure, but also do not require the use of fasteners such as screws, and are easy to disassemble and assemble, which is convenient for the later maintenance of the electric toothbrush.

[0070] The slot body 53 is opened forward, and a mounting slot 36 is provided at the opening of the slot body 53. The control board 4 is arranged in the mounting slot 36. The front end of the positive copper sheet 7 is provided with a connecting sheet 37 bent upward. The connecting sheet 37 is pressed against the front end surface of the lower part of the control board 4 and is electrically connected to the control board 4. The upper part of the control board 4 and the upper end of the connecting copper sheet 9 are mutually tightened and electrically connected through the second wire 38. Two connecting posts 39 are provided at the back of the slot body 53. The connecting copper sheet 9 is correspondingly provided with a connecting hole 40 for the connecting post 39 to pass through. The connecting copper sheet 9 is sleeved on the connecting post 39 through the connecting hole 40. The lower end of the connecting copper sheet 9 is bent upward and wrapped tightly at the lower end of the slot body 53. If necessary, the control board 4 and the connecting copper sheet 9 can be glued to the slot body 53, or connected to the slot body 53 by a snap-fit ​​structure. The above-mentioned transmission rod 2, control board 4, positive copper sheet 7 and connecting copper sheet 9 are not only simple in assembly structure, but also convenient for disassembly and assembly without the use of fasteners such as screws.

[0071] The fixing slot 35 in this embodiment opens forward, so that the opening direction of the fixing slot 35 is the same as the direction of the mounting slot 36 , thereby facilitating the assembly of the positive electrode copper sheet 7 .

[0072] The battery cover 10 is sleeved on the upper end of the battery 5, a convex edge 30 is provided on the outer edge of the battery cover 10, and a limiting step 31 is provided on the inner peripheral wall of the lower handle body 14, and the convex edge 30 presses on the limiting step 31. The above structure can effectively support the battery cover 10 by the lower handle body 14, thereby effectively preventing the battery cover 10 from causing damage such as crushing to the battery 5.

[0073] A positioning boss 32 is provided at the upper end of the battery cover 10, and the negative copper sheet 8 is placed at the upper end of the battery cover 10 and sleeved on the positioning boss 32. A pair of downwardly bent clips 33 and a downwardly bent elastic contact sheet 34 are provided on the negative copper sheet 8. The pair of clips 33 are clamped on the battery cover 10, and the elastic contact sheet 34 is pressed on the side of the battery 5 and electrically connected to the negative electrode of the battery 5. Specifically, a copper sheet can be connected to the side wall of the battery 5, and one end of the copper sheet is electrically connected to the negative electrode of the battery 5, and the elastic contact sheet 34 is pressed on the copper sheet. Of course, the side wall of the battery 5 can also be the negative electrode of the battery 5. The battery cover 10 and the negative copper sheet 8 of the above structure not only have a simple assembly structure, but also do not need to use fasteners such as screws, which is convenient for disassembly and assembly, and is convenient for the later maintenance of the electric toothbrush.

[0074] The built-in part is snap-connected with the upper handle body 13, and the snap connection includes at least one first snap buckle 18 and a first snap groove 19 matching with the first snap buckle 18. In the present embodiment, there are two first snap buckles 18, which are symmetrically arranged on both sides of the built-in part, and the first snap groove 19 is arranged at the corresponding position of the upper handle body 13. The above-mentioned snap connection structure not only facilitates the disassembly and assembly of the upper handle body 13 and the transmission rod 2, but also when the lower handle body 14 is removed, the transmission rod 2 can be fixed on the upper handle body 13 without being detached from the upper handle body 13.

[0075] The first clamping groove 19 penetrates the side wall of the upper handle body 13 , so that the first buckle 18 can be easily separated from the first clamping groove 19 , thereby further facilitating the disassembly and assembly of the upper handle body 13 and the transmission rod 2 .

[0076] The first card slot 19 in this embodiment is arranged on the insert piece 21, so that not only the lower handle body 14 can cover the first card slot 19, thereby effectively improving the dustproof and waterproof effects of the electric toothbrush, but also ensuring the aesthetics of the electric toothbrush; in addition, the above structure can also make the card connection structure between the transmission rod 2 and the upper handle body 13 further away from the vibration motor 3, thereby reducing the vibration and collision strength of the connection between the transmission rod 2 and the upper handle body 13, and thus reducing the noise generated when the electric toothbrush is used.

[0077] At least one sealing ring 24 is provided between the outer peripheral wall of the insert 21 and the inner peripheral wall of the lower handle body 14. In this embodiment, there are two sealing rings 24, which are spaced apart from each other. The slide groove 22 and the first clamping groove 19 are both located below the sealing ring 24. The above structure can not only greatly improve the dustproof and waterproof effect of the electric toothbrush, but also reduce the vibration and collision strength of the connection between the upper handle body 13 and the lower handle body 14, thereby reducing the noise generated when the electric toothbrush is used.

[0078] The electric toothbrush of the present invention further comprises an elastic sealing pad 6, which is sleeved on the upper end of the built-in part. An annular step 25 is provided on the outer peripheral wall of the built-in part. The elastic sealing pad 6 is pressed between the upper end of the annular step 25 and the top of the inner cavity of the toothbrush handle at the lower end of the perforation 15. The elastic sealing pad 6 is made of rubber, silicone and other materials. The provision of the elastic sealing pad 6 not only effectively enhances the dustproof and waterproof effects at the perforation 15, but also avoids direct contact between the upper end of the built-in part and the toothbrush handle, plays a role in silencing and vibration reduction, thereby not only greatly reducing the noise generated when the electric toothbrush is used, but also effectively reducing the vibration of the toothbrush handle, and improving the comfort of using the electric toothbrush.

[0079] In this embodiment, the elastic sealing gasket 6 is tightly sleeved on the rod body 52 in the upper handle body 13, so that the elastic sealing gasket 6 can be assembled together with the transmission rod 2, and the assembly and disassembly are simple; the annular step 25 is set on the rod body 52 in the upper handle body 13.

[0080] The outer edge of the elastic sealing pad 6 extends downward to form a sealing sleeve 26, and an annular convex ring 27 is also provided at the top of the inner cavity of the upper handle body 13, and the sealing sleeve 26 is pressed between the outer peripheral wall of the transmission rod 2 and the inner peripheral wall of the annular convex ring 27. The above structure not only further enhances the dustproof and waterproof effect at the through hole 15, but also can further reduce the vibration and collision strength between the upper handle body 13 and the transmission rod 2, thereby reducing the noise generated when the electric toothbrush is used.

[0081] The lower end of the toothbrush head 1 is provided with a sleeve 46, which is sleeved on the exposed part of the rod body 52. ​​The exposed part of the rod body 52 is provided with a limiting protrusion 47, and the lower part of the sleeve 46 is provided with a limiting hole 48 that matches the limiting protrusion 47. The assembly structure between the toothbrush head 1 and the transmission rod 2 is not only simple, but also does not require the use of fasteners such as screws, and is easy to disassemble and assemble, which is convenient for the later maintenance of the electric toothbrush.

[0082] An elastic sleeve 49 is sleeved on the lower part of the sleeve 46, and the elastic sleeve 49 is pressed between the sleeve 46 and the upper handle body 13. The elastic sleeve 49 can be made of rubber, silicone and other materials. The setting of the elastic sleeve 49 not only has a decorative effect, making the electric toothbrush more beautiful, but also can effectively reduce the collision between the toothbrush head 1 and the toothbrush handle, and plays a role in silencing and reducing vibration, thereby greatly reducing the noise generated when the electric toothbrush is used.

[0083] A pair of limiting grooves 50 are provided on the peripheral wall of the through hole 15, and a limiting boss 51 is provided at the corresponding position of the outer peripheral wall of the rod body 52. ​​The limiting boss 51 is located in the limiting groove 50. The matching structure of the limiting boss 51 and the limiting groove 50 can prevent the transmission rod 2 from rotating relative to the upper handle body 13.

[0084] The above embodiments are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An electric toothbrush, comprising a toothbrush head (1), a toothbrush handle, a transmission rod (2), a vibration motor (3), a control panel (4) and a battery (5), wherein the control panel (4) and the battery (5) are both arranged in the toothbrush handle, characterized in that: The transmission rod (2) comprises an exposed portion and an internal portion, the upper end of the toothbrush handle is provided with a through hole (15), the exposed portion extends through the through hole (15) outside the toothbrush handle and is detachably connected to the toothbrush head (1), the internal portion is located inside the toothbrush handle and is connected to the toothbrush handle, the control panel (4) is mounted on the internal portion, the vibration motor (3) is mounted in the inner cavity of the exposed portion, the vibration motor (3) and the battery (5) are both electrically connected to the control panel (4), the toothbrush handle comprises an upper handle body (13) and a lower handle body (14) which are detachably connected, the lower handle body (14) is provided with a battery (5), the through hole (15) is arranged at the upper end of the upper handle body (13), the The built-in part is located in the upper handle body (13); the upper part of the inner peripheral wall of the lower handle body (14) is provided with at least one protruding plug block (20); the number of the plug blocks (20) is two, and the two plug blocks (20) are evenly arranged on the inner peripheral wall of the lower handle body (14) in the circumferential direction; the lower end of the upper handle body (13) is provided with an annular plug sheet (21); the side wall of the plug sheet (21) is provided with at least one slide groove (22); the upper end of the lower handle body (14) is open; the upper part of the lower handle body (14) is sleeved on the plug sheet (21) from bottom to top; the plug block (20) is located in the corresponding slide groove (22); when the lower handle body (14) rotates circumferentially relative to the upper handle body (13), the plug block (20) can The toothbrush (20) is provided with an insertion opening (23) at the lower end of one side of the toothbrush (22) for the insertion block (20) to enter. The built-in part is snap-fitted with the upper handle body (13). The snap-fitting includes at least one first snap buckle (18) and a first snap groove (19) matched with the first snap buckle (18). There are two first snap buckles (18) which are symmetrically arranged on both sides of the built-in part. The first snap groove (19) is arranged at a corresponding position of the upper handle body (13). The first snap groove (19) is arranged on the inserting piece (21). The transmission rod (2) is divided into a hollow rod body (52) and a groove body (53) with a radial opening along the toothbrush handle. The rod body extending outside the toothbrush handle The (52) portion forms an exposed portion, the rod body (52) portion located in the toothbrush handle and the groove body (53) form a built-in portion, the vibration motor (3) is installed in the inner cavity of the rod body (52) portion extending outside the toothbrush handle, the control panel (4) is installed on the groove body (53), and the outer sides of the two side walls of the groove body (53) are provided with axial protruding rods (16), the free ends of the two protruding rods (16) and the rear ends of the two side walls of the groove body (53) are in contact with the inner cavity side walls of the toothbrush handle, and two limiting rods (54) for limiting the forward movement of the protruding rods (16) are axially provided on the inner cavity side walls of the toothbrush handle, and the limiting rods (54) are arranged on the upper handle body (13).

2. The electric toothbrush according to claim 1, characterized in that: The wall thickness of the exposed portion is smaller than the wall thickness of the built-in portion.

3. The electric toothbrush according to claim 2, characterized in that: The wall thickness of the exposed portion gradually increases along the axis direction of the transmission rod (2) starting from the free end of the exposed portion.

4. The electric toothbrush according to claim 1, characterized in that: At least a portion of the circumferential outer side wall of the built-in part is in contact with or in contact with the inner cavity side surface of the toothbrush handle, and the contact or in contact is used to limit the lateral position of the built-in part.

5. The electric toothbrush according to claim 1, characterized in that: It also comprises a support rod (11), one end of the support rod (11) being connected to the slot body (53), and the other end of the support rod (11) extending into the inner cavity of the rod body (52) to support the vibration motor (3).

6. The electric toothbrush according to claim 5, characterized in that: A first buffer member (41) is provided between the vibration motor (3) and the support rod (11).

7. The electric toothbrush according to claim 5, characterized in that: The support rod (11) is isolated from the inner cavity side wall of the rod body (52) by at least one second buffer component (42).

8. The electric toothbrush according to claim 5, characterized in that: It also comprises a buffer ring sheet (12), a support step (45) is provided at the lower part of the support rod (11), and the buffer ring sheet (12) is sleeved on the support rod (11) and pressed between the support step (45) and one end of the rod body (52).

9. The electric toothbrush according to claim 8, characterized in that: The support rod (11) is clamped with the groove body (53), and the clamping connection includes at least one second clamping buckle (43) and a second clamping groove (44) matching the second clamping buckle (43). The buffer ring sheet (12) is pressed between the support step (45) and one end of the rod body (52) through the clamping connection.

10. The electric toothbrush according to claim 1, characterized in that: The built-in part and the battery (5) are provided with an electrical connection structure, and the electrical connection structure is used to achieve a detachable electrical connection between the control panel and the battery (5).

11. The electric toothbrush according to claim 10, characterized in that: The electrical connection structure comprises a positive copper sheet (7), a negative copper sheet (8), a connecting copper sheet (9) and a battery cover (10); the battery cover (10) is connected to the upper end of the battery (5); the negative copper sheet (8) is connected to the battery cover (10) and is electrically connected to the negative electrode of the battery (5); the connecting copper sheet (9) is located in the upper handle body (13) and is connected to the built-in part; the connecting copper sheet (9) is electrically connected to the control board (4); the lower end of the connecting copper sheet (9) is pressed against the negative copper sheet (8); the positive copper sheet (7) is connected to the lower end of the built-in part and is electrically connected to the control board (4); the lower end of the positive copper sheet (7) is connected to a spring (28); the lower end of the spring (28) is pressed against the positive electrode of the battery (5); and the positive copper sheet (7) is electrically connected to the positive electrode of the battery (5) via the spring (28).

12. The electric toothbrush according to claim 1, 10 or 11, characterized in that: The built-in part is snap-connected with the upper handle body (13), and the snap connection includes at least one first snap buckle (18) and a first snap groove (19) matching the first snap buckle (18).

13. The electric toothbrush according to claim 1, characterized in that: It also comprises an elastic sealing pad (6), which is sleeved on the upper end of the built-in part, an annular step (25) is provided on the outer peripheral wall of the built-in part, and the elastic sealing pad (6) is pressed between the upper end of the annular step (25) and the top of the inner cavity of the toothbrush handle at the lower end of the through hole (15).

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