Brush handle and electric toothbrush

Abstract

The utility model discloses a brush handle and an electric toothbrush. The brush handle comprises a shell, a motor support assembly, a display screen and a light-transmitting cover. A containing cavity is defined by the shell, and a placement groove communicating with the containing cavity is formed in the peripheral surface of the shell; the motor support assembly is arranged in the containing cavity and comprises a support, a motor and a circuit board, the motor and the circuit board are arranged on the support, and the circuit board is arranged on the side, close to the display screen, of the support. The display screen is arranged in the placing groove and is electrically connected with the circuit board, and the display surface of the display screen is arranged back to back to the motor bracket assembly; the light-transmitting cover is opposite to the display screen in position, and the light-transmitting cover is connected with the shell so as to seal a groove opening of the containing groove. The display screen is arranged in the placement groove in the shell, so that the distance between the display screen and the outer surface of the shell can be closer, and the display effect of the display screen can be enhanced.

Description

Technical Field

[0001] This application relates to the field of oral hygiene equipment technology, and more particularly to a brush handle and an electric toothbrush. Background Technology

[0002] An electric toothbrush is an electric oral hygiene device used to clean the mouth. When using an electric toothbrush, the user holds the handle and places the bristles on the brush head against the teeth. The motor then drives the brush head to vibrate and clean the teeth. Compared to a regular manual toothbrush, an electric toothbrush requires less effort and achieves better oral cleaning. The handle typically includes a housing and a motor support assembly. The motor support assembly is housed within the housing, which provides protection. For user convenience, the handle usually includes a display screen showing the operating mode and speed settings.

[0003] However, in related technologies, the display screen is usually directly mounted on the bracket of the motor bracket assembly using methods such as full lamination or frame mounting. Then, the motor bracket assembly is inserted into the housing through the bottom opening of the housing. This results in a large distance between the display screen and the outer surface of the housing, which in turn leads to a poor display effect. Utility Model Content

[0004] This application provides a brush handle and an electric toothbrush, in which the display screen is placed in a slot on the housing, so that the distance between the display screen and the outer surface of the housing can be closer, thereby enhancing the display effect of the display screen.

[0005] In a first aspect, this application provides a brush handle, comprising:

[0006] A housing, the housing being configured to form a receiving cavity, and a placement groove communicating with the receiving cavity being provided on the outer peripheral surface of the housing;

[0007] A motor bracket assembly is disposed within the receiving cavity. The motor bracket assembly includes a bracket and a motor and a circuit board disposed on the bracket. The circuit board is disposed on the side of the bracket closer to the display screen.

[0008] A display screen is disposed in the placement slot, the display surface of the display screen facing away from the motor bracket assembly; a circuit board is disposed on the side of the bracket near the display screen and electrically connected to the display screen; the outer diameter or width of the display screen is d1; and...

[0009] A light-transmitting cover is positioned opposite the display screen and is connected to the housing to seal the opening of the placement slot.

[0010] The bracket has a first surface facing the display screen, and a first plane containing the first surface is located within the housing. The width of the first plane is d2, where d2 ≤ d1; and / or,

[0011] The motor has a second surface facing the display screen, and a second plane containing the second surface is located within the housing. The width of the second surface is d3, where d3 ≤ d1; and / or,

[0012] The width of the circuit board is d4, where d4 ≤ d1.

[0013] In some embodiments, a first clearance opening communicating with the receiving cavity is provided on the peripheral side wall of the placement slot, and a portion of the display screen is inserted into the first clearance opening. This allows the size of the display screen to be larger than the size of the placement slot, thereby enabling the display screen to be made larger and making it easier for users to view the content displayed on the display screen.

[0014] In some embodiments, a first clearance opening communicating with the receiving cavity is provided on the peripheral side wall of the placement slot, and the display screen is electrically connected to the circuit board through the first clearance opening. The first clearance opening can provide a connection channel for the connection between the display screen and the circuit board, making the connection between the display screen and the circuit board more convenient.

[0015] In some embodiments, the first clearance opening is located on the side of the peripheral sidewall furthest from the head end of the housing; and / or, the first clearance opening is located on the side of the peripheral sidewall closer to the circuit board. This reduces the vibration transmitted from the head end of the housing to the connecting terminals, prevents the connecting terminals from detaching from the motor bracket assembly, thus preventing electrical connection failure between the connecting terminals and the circuit board, and reduces the distance between the connecting terminals and the circuit board, facilitating electrical connection between the connecting terminals and the circuit board.

[0016] In some embodiments, a second clearance opening is provided on the bottom wall of the placement groove, and the second clearance opening communicates with the receiving cavity. This allows the second clearance opening to also provide a connection channel for the connection traces connecting the display screen and the circuit board, making the connection between the display screen and the circuit board more convenient.

[0017] In some embodiments, the display screen is electrically connected to the circuit board through the second recessed opening. This connection between the display screen and the circuit board is more convenient.

[0018] In some embodiments, the circuit board further includes a terminal block, wherein the terminal block is disposed on the side of the circuit board near the display screen, and the terminal block is electrically connected to the display screen through the second clearance opening, thereby electrically connecting the circuit board to the display screen; or, the display screen includes a screen body and connecting terminals, the screen body has the display surface, the connecting terminals are connected to the screen body, the terminal block is disposed on the side of the circuit board near the display screen, and the terminal block is electrically connected to the connecting terminals through the second clearance opening, thereby electrically connecting the circuit board to the display screen; or, the terminal block is disposed on the side of the motor near the display screen, a first electrical connector is connected to the display screen, the first electrical connector is electrically connected to the terminal block through the second clearance opening, and the circuit board is electrically connected to the terminal block through a second electrical connector, thereby electrically connecting to the display screen. This makes the connection between the display screen and the circuit board more convenient.

[0019] In some embodiments, the terminal block is positioned close to the second clearance opening. This allows the terminal block to be positioned closer to the display screen, making it easier to connect the display screen to the terminal block.

[0020] In some embodiments, a first electrical connector is connected to the display screen, and the first electrical connector is electrically connected to the circuit board through a second clearance opening, thereby connecting the display screen to the circuit board; wherein at least a portion of the first electrical connector is bent and stacked in the depth direction of the placement slot. This makes the arrangement of the first electrical connector more orderly and prevents wiring problems caused by random bending of the ribbon cable under frequent vibration.

[0021] In some embodiments, a first clearance opening is provided on the peripheral side wall of the placement slot. A portion of the display screen is inserted into the first clearance opening, and a second clearance opening extends to and communicates with the first clearance opening. The second clearance opening can serve as a guide, making the angled installation of the display screen smoother.

[0022] In some embodiments, the second clearance opening extends toward the first clearance opening in a direction away from the head end of the housing. The display screen can slide along the second clearance opening toward the head end of the housing to the first clearance opening, thereby causing the connection terminals of the display screen to be located on the side of the screen body away from the head end of the housing after installation.

[0023] In some embodiments, the outer diameter of the display screen is larger than the inner or outer diameter of the housing. This allows the display screen to have a larger size, making it easier for users to view the content displayed on the screen and thus enhancing the user experience.

[0024] In some embodiments, the peripheral wall of the placement slot includes: a connecting wall extending away from the centerline of the placement slot; a first wall located on the side of the connecting wall near the slot opening and connected to a first end of the connecting wall; and a second wall located on the side of the connecting wall away from the slot opening and connected to a second end of the connecting wall. The light-transmitting cover includes a supporting portion and an insertion portion. The supporting portion is supported by the connecting wall and contacts the first wall, while the insertion portion is located on the side of the supporting portion near the placement slot, inserted into the placement slot, and contacts the second wall. This design allows the light-transmitting cover to be placed more stably within the placement slot and prevents it from sinking. The insertion portion also improves the sealing at the connection between the light-transmitting cover and the housing.

[0025] In some embodiments, the connecting wall is an annular surface surrounding the placement groove. This allows the connecting wall to provide support for the entire circumference of the support portion and to conform to various parts of the support portion, thereby improving the sealing performance at the contact points between the support portion and the connecting wall.

[0026] In some embodiments, the outer surface of the light-transmitting cover extends downwards at an angle from the central area to its periphery; or, the outer surface of the light-transmitting cover extends upwards at an angle from the central area to its periphery; or, the distance between the top of the light-transmitting cover and the bottom of the placement groove is less than or equal to the distance between the groove opening and the bottom of the placement groove. This prevents water from accumulating in the central area of ​​the light-transmitting cover and affecting the user's viewing of the display screen; or, it can prevent the central area of ​​the light-transmitting cover from contacting the ground and scratching the central area of ​​the light-transmitting cover when the brush handle falls.

[0027] In some embodiments, the display screen is cylindrical in shape. This makes the display screen more rounded and facilitates its placement in the mounting slot.

[0028] In some embodiments, a soft protective sleeve is provided on the outer surface of the display screen to provide protection for the display screen.

[0029] In some embodiments, the outer surface of the display screen includes a display surface, a bottom surface, and a peripheral surface. The bottom surface faces away from the display surface, and the peripheral surface is located between the bottom surface and the display surface. At least a portion of the soft protective sleeve covers the bottom surface and the peripheral surface, and abuts against the wall of the placement slot. The soft protective sleeve separates the display screen from the housing, ensuring a certain buffer distance between them. The soft protective sleeve effectively reduces vibration and impact, significantly reducing the impact on the display screen and preventing damage due to excessive vibration.

[0030] In some embodiments, the flexible protective sleeve includes a bottom protective portion covering the bottom surface and a peripheral protective portion covering the peripheral side surface. The bottom protective portion and / or the peripheral protective portion are provided with a plurality of deformation notches, which are spaced apart along the periphery of the flexible protective sleeve. The deformation notches provide deformation space for the flexible protective sleeve, allowing it to be smoothly fitted onto the display screen.

[0031] In some embodiments, a first clearance opening is provided on the peripheral side wall of the placement slot. The display screen includes a screen body and a connecting terminal. The screen body is disposed in the placement slot. The outer side of the screen body includes the display surface, the bottom surface, and the peripheral side surface. The connecting terminal is inserted into the first clearance opening. The connecting terminal is connected to the screen body and electrically connected to the circuit board, so that the screen body is electrically connected to the circuit board. The soft protective sleeve includes a terminal protection portion covering the connecting terminal. The terminal protection portion has a connection port for the connecting end of the connecting terminal to extend out. The connecting end is electrically connected to the circuit board. By covering the connecting terminal with the terminal protection portion of the soft protective sleeve, the connecting terminal can be separated from the housing, providing shock absorption and anti-slip protection for the connecting terminal, preventing damage from large impacts. Simultaneously, it prevents the housing from transmitting the impact force through the connecting terminal to the display screen when the brush handle falls, thus preventing the display screen from experiencing significant vibration and impact.

[0032] In some embodiments, the display surface includes a display area and an edge area surrounding the display area, with the soft protective sleeve covering the edge area. The soft protective sleeve also provides shock absorption protection for the edge area, while ensuring the display area is not obstructed. This allows the soft protective sleeve to provide maximum shock absorption protection for the display screen while preventing it from obstructing the display area.

[0033] In some embodiments, limiting ribs are provided on the periphery of the soft protective sleeve, and the limiting ribs abut against the periphery of the placement groove. This makes the soft protective sleeve more tightly connected to the housing, thereby making the display screen more secure and preventing the display screen from loosening during use.

[0034] Secondly, this application also provides an electric toothbrush, including a brush head and a brush handle as described in any of the above embodiments, wherein the brush head is drivenly connected to the motor.

[0035] The beneficial effects of this application are as follows: By placing the display screen in a mounting slot on the housing, the slot provides space and limits for the display screen. Simultaneously, the light-transmitting cover seals the opening of the mounting slot, preventing water and dirt from entering and damaging the display screen. Light emitted from the display screen can pass through the light-transmitting cover normally, allowing users to view the content displayed on the screen through the cover. The display screen does not need to be directly mounted on the motor bracket assembly using full lamination or frame bonding methods, making installation more convenient and simpler, reducing assembly costs. Furthermore, the distance between the display screen and the outer surface of the housing can be adjusted by designing the depth of the mounting slot, allowing for a closer proximity and enhanced display effect. In addition, there is no need to fix the display screen to the bracket and push the bracket and display screen together into the housing through the bottom opening for installation. The size of the display screen is not limited by the diameter of the bottom opening of the housing, allowing for a larger display screen, which is more convenient for users to view the content displayed on the screen, thus enhancing the user experience. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the brush handle structure in one embodiment of this application;

[0038] Figure 2 This is a partial structural diagram of the brush handle in one embodiment of this application;

[0039] Figure 3 This is a schematic diagram of the angled installation of the display screen in one embodiment of this application;

[0040] Figure 4 This is a partial structural diagram of the brush handle in one embodiment of this application;

[0041] Figure 5 This is a partial structural diagram of the brush handle in one embodiment of this application;

[0042] Figure 6 This is a schematic diagram of the display screen and the soft protective cover from a first-view perspective in one embodiment of this application;

[0043] Figure 7 This is a schematic diagram of the display screen and the soft protective cover from a second perspective in one embodiment of this application;

[0044] Figure 8 This is a schematic diagram of the structure of the display screen and the soft protective cover separated in one embodiment of this application from a third-person perspective;

[0045] Figure 9 This is a structural schematic diagram from a fourth-angle view of one embodiment of this application when the display screen and the soft protective cover are separated;

[0046] Figure 10 This is a schematic diagram of the structure of an electric toothbrush in one embodiment of this application.

[0047] Figure label:

[0048] 10. Housing; 11. Receiving cavity; 12. Placement slot; 121. Connecting wall; 122. First wall; 123. Second wall; 124. Groove; 13. First clearance opening; 14. Second clearance opening; 15. Head end; 20. Motor bracket assembly; 21. Bracket; 211. First surface; 22. Circuit board; 23. Motor; 231. Second surface; 24. Battery; 25. Connecting base; 26. Second electrical connector; 30. Display screen; 311. Display surface; 311 a. Display area; 311b. Edge area; 312. Bottom surface; 313. Peripheral side surface; 32. Screen body; 33. Connecting terminal; 40. Light-transmitting cover; 41. Supporting part; 42. Insertion part; 43. Center area; 51. Abutting part; 52. First electrical connector; 60. Soft protective sleeve; 61. Bottom protective part; 611. Through port; 62. Peripheral protective part; 63. Terminal protective part; 631. Connecting port; 64. First notch; 65. Second notch; 70. Limiting rib; 80. Brush head. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0050] An electric toothbrush is an electric oral hygiene device used to clean the mouth. When using an electric toothbrush, the user holds the handle and places the bristles on the brush head against the teeth. The motor then drives the brush head to vibrate and clean the teeth. Compared to a regular manual toothbrush, an electric toothbrush requires less effort and achieves better oral cleaning. The handle typically includes a housing and a motor support assembly. The motor support assembly is housed within the housing, which provides protection. For user convenience, the handle usually includes a display screen showing the operating mode and speed settings.

[0051] However, in related technologies, the display screen is typically mounted directly onto the motor bracket assembly using methods such as full lamination or frame mounting. The motor bracket assembly is then inserted into the housing through an opening at the bottom of the housing. This results in a significant distance between the display screen and the outer surface of the housing, leading to poor display quality. Furthermore, when the size of the display screen exceeds the diameter of the bottom opening, or even when the outer diameter of the display screen is greater than or equal to half the width of the bracket or the width of the circuit board, it becomes difficult to insert the display screen into the housing through the bottom opening. This limits the size of the display screen, making it difficult for users to see the content displayed.

[0052] In view of the above problems, this application provides a brush handle and an electric toothbrush to solve the above technical problems.

[0053] Firstly, this application provides a brush handle, such as Figure 1 and Figure 2 As shown, the brush handle includes a housing 10 and a motor bracket assembly 20 (e.g., ...). Figure 5 ), display screen 30 and light-transmitting cover 40.

[0054] The shell 10 surrounds and forms a receiving cavity 11 (e.g. Figure 5 The outer peripheral surface of the housing 10 is provided with a placement groove 12 that communicates with the receiving cavity 11. The housing 10 is used to provide support and installation space for components such as the motor bracket assembly 20 and the light-transmitting cover 40. The overall shape of the housing 10 can be cylindrical, prismatic, or other shapes.

[0055] The motor bracket assembly 20 is disposed within the receiving cavity 11. The motor bracket assembly 20 includes a bracket 21 and a motor 23 disposed on the bracket 21. Figure 5 ) and circuit board 22 (such as Figure 5 The motor 23 is used with the brush head 80 of the electric toothbrush (e.g., ...). Figure 10 The motor support assembly 20 is connected to the drive system and can drive the brush head 80 to vibrate for oral cleaning. The motor support assembly 20 may also include a battery 24, which powers the motor 23 and the circuit board 22. The circuit board 22 is located on the side of the support 21 near the display screen 30. The circuit board 22 controls the operation of electronic devices such as the display screen 30. The circuit board 22 can be a single-sided, double-sided, or multi-layer board. This application does not specifically limit the type, model, or size of the circuit board 22.

[0056] The display screen 30 is disposed in the placement slot 12 and is electrically connected to the circuit board 22. The display surface 311 of the display screen 30 is disposed opposite to the motor bracket assembly 20. The outer diameter or width of the display screen 30 is d1.

[0057] The display screen 30 can be various devices capable of displaying information, such as: cathode ray tube displays (CR), light-emitting diode displays (LED), electronic ink screens, liquid crystal displays (LCD), organic light-emitting diode displays (OLED), and plasma display panels (PDP). The display surface 311 is the surface on the display screen 30 used for displaying information; users can view text, images, videos, and other information on the display surface 311.

[0058] The width of the display screen 30 refers to the dimension of the display screen 30 in the direction parallel to the display surface of the display screen 30 and perpendicular to the length direction of the housing 10. When the display screen 30 is cylindrical in shape, that is, the display screen 30 can be cylindrical or approximately cylindrical, and the cross-section of the display screen is circular or approximately circular, d1 is the outer diameter of the display screen 30. When the display screen 30 is not cylindrical in shape, d1 is the width of the display screen 30.

[0059] The light-transmitting cover 40 is positioned opposite the display screen 30 and is connected to the housing 10 to seal the slot 124 of the placement groove 12. As the name suggests, the light-transmitting cover 40 is a cover structure that allows light to pass through. The light-transmitting cover 40 can be made of materials such as light-transmitting rubber or light-transmitting plastic.

[0060] It is understood that in this application, by placing the display screen 30 in the placement slot 12 on the housing 10, the placement slot 12 provides a space for the display screen 30 to be accommodated and limited. At the same time, the light-transmitting cover 40 seals the opening 124 of the placement slot 12, preventing water and dirt from entering the placement slot 12 through the opening 124 and causing damage to the display screen 30. The light emitted by the display screen 30 can pass normally through the light-transmitting cover 40, allowing the user to view the content displayed on the display screen 30 through the light-transmitting cover 40. The display screen 30 does not need to be directly mounted on the bracket 21 of the motor bracket assembly 20 using full lamination or frame mounting methods. The installation of the display screen 30 is more convenient and simple, and the assembly cost is lower. Furthermore, the distance between the display screen 30 and the outer surface of the housing 10 can be adjusted by designing the depth of the placement slot 12, so that the distance between the display screen 30 and the outer surface of the housing 10 can be closer, thereby enhancing the display effect of the display screen 30.

[0061] In some embodiments, the bracket 21 has a first surface 211 facing the display screen 30 (e.g., Figure 5The first plane containing the first surface 211 is located within the housing 10. The width of the first plane is d2, where d2 ≤ d1. d1 can be d2, 1.2d2, 1.3d2, 1.5d2, or other multiples of d2. The specific values ​​of d1 and d2 can be selected according to actual needs. In some embodiments, the motor 23 has a second surface 231 facing the display screen 30 (e.g., ...). Figure 5 The second plane containing the second surface 231 is located within the housing 10. The width of the second plane is d3, where d3 ≤ d1. d1 can be d3, 1.2d3, 1.3d3, 1.5d3, or other multiples of d3. The specific values ​​of d1 and d3 can be selected according to actual needs. In some embodiments, the width of the circuit board 22 is d4, where d4 ≤ d1. d1 can be d4, 1.2d4, 1.3d4, 1.5d4, or other multiples of d4. The specific values ​​of d1 and d4 can be selected according to actual needs.

[0062] The width of the first plane refers to its dimension in the direction parallel to the display surface of the display screen 30 and perpendicular to the length direction of the housing 10. Similarly, the width of the second plane refers to its dimension in the direction parallel to the display surface of the display screen 30 and perpendicular to the length direction of the housing 10. The width of the circuit board 22 refers to its dimension in the direction parallel to the display surface of the display screen 30 and perpendicular to the length direction of the housing 10.

[0063] Compared to related technologies where the display screen 30 needs to be fixed to the bracket 21 and the bracket 21 and display screen 30 are pushed into the housing 10 together through the bottom opening of the housing 10, in this new technology, if the display screen 30, placed on the bracket 21, is to be assembled into a specific area through the bottom opening of the housing 10, and the display screen 30 is typically placed on the side of the bracket 21 with the first surface 211, in order for the housing 10 to provide more stable support for the bracket 21, the two sides of the first surface 211 of the bracket 21 will usually contact the inner wall of the housing 10. The width of the first surface 211 is approximately equal to the width of the area of ​​the bottom opening of the housing 10 used for assembling the bracket 21. If the outer diameter or width of the display screen 30 is greater than or equal to the width of the first surface 211, the display screen 30 will not be able to be installed into the housing 10 through the bottom opening of the housing 10. Similarly, since the width inside the housing 10 also needs to be considered when installing the motor 23 and the circuit board 22, if the outer diameter or width of the display screen 30 is greater than or equal to the width of the second surface 231 (or the width of the circuit board 22), the display screen 30 cannot be installed. In order to avoid the display screen 30 having an excessive depth of field, the related technology requires that the outer diameter or width of the display screen 30 be designed to be much smaller than the width of the first surface 211, the second surface 231 and the circuit board 22.

[0064] In this application, the display screen 30 is directly installed in the placement slot 12 on the housing 10. It is not necessary to fix the display screen 30 to the bracket 21, nor is it necessary to push the display screen 30 into the housing 10 through the bottom opening. The size of the display screen 30 is not limited by the diameter of the bottom opening of the housing 10. The size of the display screen 30 can be larger. For example, in this application, the outer diameter or width of the display screen 30 can be greater than the width of the first surface 211 of the bracket 21, the width of the second surface 231 of the motor 23, and the width of the circuit board 22. The outer diameter or width of the display screen 30 can also be greater than the diameter of the bottom opening of the housing 10, which makes it easier for users to view the content displayed on the display screen 30 and thus enhances the user experience.

[0065] like Figures 2 to 4 As shown, in some embodiments of this application, a first clearance opening 13 is provided on the peripheral side wall of the placement slot 12, and a portion of the display screen 30 is inserted into the first clearance opening 13. It can be understood that the first clearance opening 13 can provide additional accommodating space for the display screen 30, so that the size of the display screen 30 can be larger than the size of the placement slot 12, thereby allowing the display screen 30 to be made larger and more convenient for users to view the content displayed on the display screen 30.

[0066] In addition, with Figure 3 Taking the schematic diagram as an example, the display screen 30 typically has a protruding portion for electrical connection. When installing the display screen 30, it can first be tilted relative to the slot 124 of the placement groove 12, with the protruding portion of the display screen 30 aligned with the first clearance opening 13. Then, the display screen 30 is inserted obliquely into the placement groove 12. As the display screen 30 slides, the protruding portion of the display screen 30 inserts into the first clearance opening 13, thereby achieving the positioning and installation of the display screen 30 in the placement groove 12, ensuring that the size of the display screen 30 is the same as or larger than the size of the placement groove 12. Even when the size of the placement slot 12 is adjusted, the screen 30 can still be smoothly inserted into the placement slot 12. Since part of the display screen 30 is located in the first clearance opening 13, the display screen 30 can be peripherally limited, thereby making the display screen 30 more stable and preventing the display screen 30 from loosening due to factors such as vibration of the motor 23. At the same time, the display screen 30 can fit more tightly with the peripheral wall of the placement slot 12, thereby preventing water from entering the placement slot 12 and flowing into the housing 10 through the gap between the display screen 30 and the peripheral wall of the placement slot 12, thus achieving a better waterproof effect.

[0067] In some embodiments, the first recess opening 13 is connected to the receiving cavity 11, allowing the display screen 30 to be inserted into a larger portion of the first recess opening 13 and into the receiving cavity 11 through the first recess opening 13. This allows the display screen 30 to be made larger, making it easier for users to view the content displayed on the display screen 30. The first recess opening 13 can also provide a connection channel for the connection traces connecting the display screen 30 and the circuit board 22, making the connection between the display screen 30 and the circuit board 22 more convenient.

[0068] See also Figures 2 to 5 As shown, in some embodiments, the display screen 30 is electrically connected to the circuit board 22 through the first clearance opening 13. The first clearance opening 13 can provide a connection channel for the electrical connection between the display screen 30 and the circuit board 22, making the connection between the display screen 30 and the circuit board 22 more convenient.

[0069] In some embodiments, the first clearance opening 13 is located on the side of the peripheral wall that is furthest from the head end 15 of the housing 10.

[0070] It should be noted that the head end 15 of the housing 10 refers to the end where the housing 10 is connected to the brush head 80. When the brush head 80 vibrates, it will cause the head end 15 of the housing 10 to vibrate strongly. Furthermore, the circuit board 22 on the motor bracket assembly 20, which is used to connect to the connection terminal 33, is usually far away from the head end 15 of the housing 10. By setting the first clearance opening 13 on the side wall that is farthest from the head end 15 of the housing 10, the distance between the first clearance opening 13 and the head end 15 of the housing 10 can be increased, thereby reducing the vibration transmitted from the head end 15 of the housing 10 to the connection terminal 33. This prevents the connection terminal 33 from detaching from the circuit board 22, which would cause the electrical connection between the connection terminal 33 and the circuit board 22 to fail. Additionally, by reducing the distance between the connection terminal 33 and the circuit board 22, the electrical connection between the connection terminal 33 and the circuit board 22 can be facilitated.

[0071] In some embodiments, the first clearance opening 13 is located on the side of the peripheral wall near the circuit board 22 to shorten the distance between the display screen 30 and the circuit board 22, making the connection between the display screen 30 and the circuit board 22 more convenient.

[0072] In some embodiments of this application, the display screen 30 includes a screen body 32 and a connection terminal 33. The screen body 32 is disposed in the placement slot 12 and has a display surface 311. The connection terminal 33 is inserted into a first recess opening 13, and the connection terminal 33 is connected to the screen body 32 and electrically connected to the circuit board 22 through the first recess opening 13, so that the screen body 32 is electrically connected to the circuit board 22.

[0073] It is understandable that the connecting terminal 33 is the protruding part on the display screen 30. The screen body 32 is used to display the image, and the connecting terminal 33 is used to realize the electrical connection between the screen body 32 and the circuit board 22. Thus, the circuit board 22 can supply power to the screen body 32. The first recessed opening 13 can be used to provide a space for the connecting terminal 33. At the same time, the cooperation between the connecting terminal 33 and the first recessed opening 13 realizes the positioning and installation of the screen body 32.

[0074] In some embodiments of this application, the circuit board 22 includes a connector 25 (e.g., Figure 5 Circuit board 22 is electrically connected to display screen 30 via connector 25. It is understood that connector 25 acts as a connector between display screen 30 and circuit board 22. When connecting display screen 30 and circuit board 22, connector 25 can be soldered and fixed to circuit board 22 on the outside of housing 10 first, then circuit board 22 can be installed in the receiving cavity 11 of housing 10, and then display screen 30 can be soldered to connector 25. This achieves electrical connection between display screen 30 and circuit board 22, preventing damage to electronic components on circuit board 22 from direct soldering of display screen 30 to circuit board 22 within the narrow space of receiving cavity 11.

[0075] In some embodiments, the connector 25 is located on the side of the circuit board 22 near the display screen 30. The connector 25 is electrically connected to the display screen 30 through the first recess opening 13, so that the circuit board 22 and the display screen 30 are electrically connected, thereby shortening the distance between the connector 25 and the display screen 30 and making the connection between the display screen 30 and the circuit board 22 more convenient.

[0076] In some embodiments, the connector 25 is electrically connected to the connection terminal 33 through the first recess opening 13, so that the circuit board 22 is electrically connected to the display screen 30. The connector 25 can extend into the first recess opening 13 to be electrically connected to the connection terminal 33, or the connector 25 can pass through the first recess opening 13 and be electrically connected to the connection terminal 33 in the placement slot 12, so that the distance between the connector 25 and the display screen 30 is shorter, thereby making the connection between the display screen 30 and the circuit board 22 more convenient.

[0077] See also Figures 2 to 5 As shown, a second clearance opening 14 is provided on the bottom wall of the placement groove 12. The second clearance opening 14 is connected to the receiving cavity 11, so that the second clearance opening 14 can also provide a connection channel for the connection line connecting the display screen 30 and the circuit board 22, making the connection between the display screen 30 and the circuit board 22 more convenient.

[0078] In some embodiments, the display screen 30 is electrically connected to the circuit board 22 through the second clearance opening 14. The second clearance opening 14 can provide a connection channel for the connection between the display screen 30 and the circuit board 22, making the connection between the display screen 30 and the circuit board 22 more convenient.

[0079] In some embodiments, the connector 25 is disposed on the side of the circuit board 22 near the display screen 30. The connector 25 is electrically connected to the display screen 30 through the second clearance opening 14, so as to shorten the distance between the connector 25 and the display screen 30 and make the connection between the display screen 30 and the circuit board 22 more convenient.

[0080] In other embodiments, the connector 25 is disposed on the side of the circuit board 22 near the display screen 30. The connector 25 is electrically connected to the connection terminal 33 through the second recess opening 14, so that the circuit board 22 and the display screen 30 are electrically connected. It is understood that by shortening the distance between the connector 25 and the connection terminal 33, the connection between the display screen 30 and the circuit board 22 is made more convenient. Furthermore, by using the connection terminal 33 and the connector 25 as an adapter between the display screen 30 and the circuit board 22, the connector 25 and the connection terminal 33 can be connected to the circuit board 22 and the display screen 30 respectively outside the housing 10 before the circuit board 22 and the display screen 30 are installed on the housing 10. Then, the connector 25 and the connection terminal 33 are connected. This can prevent the display screen 30 from being directly soldered to the circuit board 22 within the narrow space of the receiving cavity 11.

[0081] In some embodiments, the terminal block 25 is located on the side of the motor 23 near the display screen 30, and is positioned near the second recess opening 14. A first electrical connector 52 is connected to the display screen 30, and the first electrical connector 52 is electrically connected to the terminal block 25 through the second recess opening 14. The circuit board 22 is electrically connected to the terminal block 25 through a second electrical connector 26, thereby connecting to the display screen 30. It is understood that by using the terminal block 25, which is separately located on the motor 23, to achieve the electrical connection between the circuit board 22 and the display screen 30, the installation positions of the circuit board 22 and the display screen 30 can be arbitrarily selected according to requirements. This makes the installation of the circuit board 22 and the display screen 30 more convenient, thereby making the assembly of the brush handle more convenient. Simultaneously, wiring is more convenient, preventing damage to the electronic components on the circuit board 22 during wiring.

[0082] In some embodiments, both the first electrical connector 52 and the second electrical connector 26 are flexible circuit boards. It should be noted that the gap between the display screen 30 and the circuit board 22 is typically small, and the flexible circuit board 52 can be bent and deformed, allowing the flexible circuit board 52 to achieve electrical connections between the display screen 30, the circuit board 22, and the terminal block 25 in a narrow area.

[0083] In some embodiments, the terminal block 25 is positioned close to the second recess opening 14, meaning that the terminal block 25 can extend into the second recess opening 14 and be electrically connected to the display screen within the second recess opening 14; the terminal block 25 can also pass through the second recess opening 14 and be electrically connected to the display screen within the placement slot 12; the terminal block 25 can also be located outside the second recess opening 14, directly below or near the periphery of the second recess opening 14, thereby allowing the terminal block 25 to be positioned closer to the display screen 30, making the connection between the display screen 30 and the terminal block 25 more convenient.

[0084] In some embodiments, at least a portion of the first electrical connector 52 is bent and stacked along the depth direction of the placement groove 12. That is, the first electrical connector 52 includes at least a plurality of flat plate portions arranged sequentially along the depth direction of the placement groove 12. These flat plate portions are arranged in parallel, and adjacent flat plate portions are connected by bending portions on the first electrical connector 52. This makes the arrangement of the longer first electrical connectors 52 more orderly and prevents wiring problems caused by random bending of the cable under frequent vibration.

[0085] In some embodiments, a portion of the display screen 30 is inserted into the first recess opening 13, and a second recess opening 14 extends to and communicates with the first recess opening 13. Figure 3 Taking the schematic diagram as an example, when inserting the display screen 30 obliquely into the placement slot 12, the connecting terminal 33 on the display screen 30 can be inserted into the second clearance opening 14 first, and then slid along the second clearance opening 14 to the first clearance opening 13, so that the display screen 30 can be installed in the placement slot 12. The second clearance opening 14 can play a guiding role, making the oblique insertion installation of the display screen 30 smoother.

[0086] The second clearance opening 14 extends away from the head end 15 of the housing 10 to the first clearance opening 13, so that when the display screen 30 is inserted at an angle, the display screen 30 can slide along the second clearance opening 14 away from the head end 15 of the housing 10 to the first clearance opening 13, thereby making the connection terminal 33 of the display screen 30 located on the side of the screen body 32 away from the head end 15 of the housing 10 after installation.

[0087] like Figures 4 to 6 As shown, in some embodiments, the display screen 30 is connected to an abutment 51 on the side near the motor bracket assembly 20. The abutment 51 abuts against the motor bracket assembly 20. The abutment 51 can raise the display screen 30, so that the display screen 30 can be closer to the outer surface of the housing 10. Furthermore, the height requirements of different sizes of display screen 30 can be met by replacing the abutment 51 with different sizes without changing the depth of the placement slot 12.

[0088] In addition, the abutment 51 can separate the display screen 30 from the motor bracket assembly 20, which can play a role in buffering and vibration reduction, weakening the vibration transmitted from the motor bracket assembly 20 to the display screen 30, and preventing the display screen 30 from shaking.

[0089] In some embodiments, the circuit board 22 is disposed on the side of the bracket 21 near the display screen 30, making the distance between the circuit board 22 and the display screen 30 closer, thereby making the connection between the display screen 30 and the circuit board 22 more convenient. The circuit board 22 is used to control the operation of electronic devices such as the display screen 30. The circuit board 22 can be a single-sided board, a double-sided board, or a multi-layer board. This application does not specifically limit the type, model, or size of the circuit board 22.

[0090] In some embodiments, the peripheral wall of the placement groove 12 includes a connecting wall 121, a first wall 122, and a second wall 123; the connecting wall 121 extends in a direction away from the axis of the placement groove 12; the first wall 122 is located on the side of the connecting wall 121 near the groove opening 124 and is connected to a first end of the connecting wall 121; the second wall 123 is located on the side of the connecting wall 121 away from the groove opening 124 and is connected to a second end of the connecting wall 121.

[0091] The light-transmitting cover 40 includes a supporting part 41 and an insertion part 42. The supporting part 41 is supported on the connecting wall 121 and contacts the first wall 122. The insertion part 42 is located on the side of the supporting part 41 near the placement groove 12. The insertion part 42 is inserted into the placement groove 12 and contacts the second wall 123.

[0092] Understandably, the aperture at the first wall surface 122 is larger than the aperture at the second wall surface 123. The connecting wall surface 121, the first wall surface 122, and the second wall surface 123 form a stepped structure. This stepped structure provides a limiting and support for the supporting part 41 of the light-transmitting cover 40, making the light-transmitting cover 40 more stable in the placement groove 12 and preventing it from sinking. The insertion part 42 can improve the sealing of the connection between the light-transmitting cover 40 and the housing 10. It should also be noted that the connecting wall surface 121 can be a plane extending from the first wall surface 122 to the second wall surface 123, or it can be a slope extending from the first wall surface 122 to the second wall surface 123.

[0093] In some embodiments, the connecting wall 121 is an annular surface surrounding the placement groove 12, so that the connecting wall 121 can provide support for the entire circumference of the support portion 41 and fit with various parts of the support portion 41, thereby improving the sealing performance at the contact point between the support portion 41 and the connecting wall 121.

[0094] like Figure 2 and Figure 5As shown, in some embodiments, the outer surface of the light-transmitting cover 40 extends downward at an angle from the central area 43 toward its periphery. It is understood that the light-transmitting cover 40 has a structure with a high central area 43 and low edges, which can prevent water from accumulating in the central area 43 of the light-transmitting cover 40 and affecting the user's viewing of the display screen 30.

[0095] In other embodiments, the outer surface of the light-transmitting cover 40 extends upward at an angle from the central region 43 toward its periphery. It is understood that the light-transmitting cover 40 has a structure with a low central region 43 and high edges to prevent the central region 43 of the light-transmitting cover 40 from contacting the ground and scratching the central region 43 of the light-transmitting cover 40 when the brush handle falls.

[0096] In some embodiments, the distance between the top of the light-transmitting cover 40 and the bottom of the placement groove 12 is less than the distance between the opening 124 and the bottom of the placement groove 12, so that the height of the light-transmitting cover 40 is less than or equal to the maximum height of the top of the placement groove 12, which can prevent the brush handle from scratching the light-transmitting cover 40 when it falls.

[0097] In some embodiments, the display screen 30 is cylindrical or substantially circular, making the overall shape of the display screen 30 smoother and facilitating its placement in the placement slot 12. The shape of the placement slot 12 can be adapted to the shape of the display screen 30. More specifically, the screen body 32 is circular or substantially circular.

[0098] In some embodiments, the outer diameter of the display screen 30 is larger than the inner diameter of the housing 10, making the display screen 30 larger in size, which makes it easier for users to view the content displayed on the display screen 30, thereby enhancing the user experience. The specific values ​​of d1 and d2 can be selected according to actual needs.

[0099] In some embodiments, the outer diameter of the display screen 30 is larger than the outer diameter of the housing 10, so that the display screen 30 has a larger size.

[0100] Furthermore, the outer diameter of the display screen 30 is d1, and the outer diameter of the housing 10 is d2, (d2+5 mm)≤d1, which makes the display screen 30 have a larger size, thus making it easier for users to view the content displayed on the display screen 30, thereby enhancing the user experience.

[0101] like Figures 5 to 9 As shown in some embodiments of this application, a soft protective sleeve 60 is provided on the outer side of the display screen 30. The soft protective sleeve 60 can protect the outer side of the display screen 30, prevent the brush handle from scratching the display screen 30 when it falls, and reduce the vibration and impact on the display screen 30, preventing the display screen 30 from being damaged due to large vibration and impact.

[0102] Furthermore, the outer side of the display screen 30 includes a display surface 311, a bottom surface 312, and a peripheral side surface 313. The bottom surface 312 is disposed opposite to the display surface 311 and faces the motor bracket assembly 20. The peripheral side surface 313 is located between the bottom surface 312 and the display surface 311. At least a portion of the soft protective sleeve 60 covers the bottom surface 312 and the peripheral side surface 313 and abuts against the groove wall of the placement groove 12.

[0103] Understandably, the soft protective sleeve 60 separates the display screen 30 from the wall of the placement slot 12, ensuring a certain buffer distance between them. When the brush handle falls or the motor 23 operates, the impact force transmitted from the housing 10 to the bottom surface 312 and peripheral side surface 313 of the display screen 30 is first transmitted to the soft protective sleeve 60, and then through the soft protective sleeve 60 to the display screen 30. The soft protective sleeve 60 effectively absorbs shock and provides protection, significantly reducing the vibration and impact on the display screen 30 and preventing it from breaking due to excessive vibration and impact. The soft protective sleeve 60, by covering the bottom surface 312 and peripheral side surface 313 of the display screen 30, makes the assembly of the soft protective sleeve 60 and the display screen 30 more convenient and simple, and the connection between the soft protective sleeve 60 and the display screen 30 is tighter. Therefore, no other connecting parts are needed during the assembly of the soft protective sleeve 60 and the display screen 30, making the overall structure of the display screen 30 and the soft protective sleeve 60 simple and with fewer parts. While ensuring effective shock absorption and protection, production costs can be reduced.

[0104] In addition, the soft protective sleeve 60 can press against the wall of the placement slot 12 by squeezing, so that the connection between the display screen 30 and the housing 10 is tighter. The soft protective sleeve 60 can be used to position and fix the display screen 30, and make the display area 311a of the display screen 30 located in the center.

[0105] In some embodiments, such as Figure 5 and Figure 6 As shown, the bottom protective part 61 is provided with a through-hole 611 that penetrates the inner and outer sides of the bottom protective part 61. The through-hole 611 is opposite to the second clearance opening 14. The abutment 51 passes through the through-hole 611 and the second clearance opening 14 and abuts against the motor bracket assembly 20.

[0106] In some embodiments, the soft protective sleeve 60 can be a silicone protective sleeve, that is, the soft protective sleeve 60 is a protective sleeve made of silicone. The silicone protective sleeve has good elastic properties, which allows the silicone protective sleeve to provide good shock absorption protection for the display screen 30. At the same time, the silicone protective sleeve has sufficient structural strength, which allows the silicone protective sleeve to have sufficient service life and is not easy to break due to pulling.

[0107] In some embodiments, the hardness of the soft protective sleeve 60 is K, where 40HRA ≤ K ≤ 70HRA. When K is less than 40HRA, the hardness of the soft protective sleeve 60 is too low, making it difficult to provide flat support for the display screen 30, and the display screen 30 is prone to tilting. When K is greater than 70HRA, the hardness of the soft protective sleeve 60 is too high, resulting in low cushioning and shock absorption capacity, making it difficult to provide good shock absorption protection for the display screen 30. K can be 40HRA, 45HRA, 50HRA, 60HRA, 65HRA, 70HRA, or other values.

[0108] In some embodiments, the thickness of the soft protective sleeve 60 is h, where 0.4 mm ≤ h. When h is less than 0.4 mm, the thickness of the soft protective sleeve 60 is too small, resulting in low cushioning and shock absorption capacity, making it difficult to provide good shock absorption protection for the display screen 30. Furthermore, the structural strength of the soft protective sleeve 60 is low, making it prone to breakage due to pulling. h can be 0.4 mm, 0.5 mm, 1 mm, 2 mm, or other values.

[0109] In some embodiments, the soft protective sleeve 60 includes a bottom protective portion 61 covering the bottom surface 312 and a peripheral protective portion 62 covering the peripheral side surface 313. The bottom protective portion 61 and / or the peripheral protective portion 62 are provided with a plurality of deformation notches. The plurality of deformation notches are arranged at intervals along the periphery of the soft protective sleeve 60. The deformation notches can provide deformation space for the soft protective sleeve 60 and can penetrate through the inner and outer sides of the soft protective sleeve 60.

[0110] by Figure 7 and Figure 8 As shown in the example, when assembling the flexible protective sleeve 60 with the display screen 30, the display screen 30 can be inserted into the space inside the flexible protective sleeve 60 through the top opening. At this time, the flexible protective sleeve 60 will undergo elastic deformation, and the deformation notch can provide deformation space for the flexible protective sleeve 60, allowing the flexible protective sleeve 60 to be smoothly fitted onto the display screen 30. The shape of the deformation notch can be circular, square, elliptical, or other shapes.

[0111] Furthermore, the multiple deformation notches include a first notch 64 and a second notch 65. The length of the first notch 64 along the circumferential direction of the soft protective sleeve 60 is greater than the length of the second notch 65 along the circumferential direction of the soft protective sleeve 60. The specific values ​​of the lengths of the first notch 64 and the second notch 65 along the circumferential direction of the soft protective sleeve 60 can be selected according to actual needs.

[0112] Understandably, the first notch 64 is a longer notch, and the second notch 65 is a shorter notch. In order to allow the flexible protective sleeve 60 to have deformation space in the circumferential direction, notches need to be set in multiple areas in the circumferential direction of the flexible protective sleeve 60. If multiple deformation notches are all the longer first notches 64, it will result in a large number of notches on the flexible protective sleeve 60, which will greatly reduce the structural strength of the flexible protective sleeve 60, and thus make the flexible protective sleeve 60 easy to break due to pulling. If multiple deformation notches are all the shorter second notches 65, the second notches 65 are not enough to provide sufficient deformation space for the flexible protective sleeve 60, which will make it difficult for the flexible protective sleeve to be fitted onto the display screen 30.

[0113] Furthermore, the first notch 64 and the second notch 65 are arranged alternately along the periphery of the soft protective sleeve 60, so that notches are provided in multiple areas in the circumferential direction of the soft protective sleeve 60. This ensures that the soft protective sleeve 60 has sufficient deformation space and sufficient structural strength in all parts of the circumferential direction.

[0114] In some embodiments, the outer surface of the screen 32 includes a display surface 311, a bottom surface 312, and a peripheral surface 313. The soft protective sleeve 60 includes a terminal protection portion 63 covering the connection terminal 33. The terminal protection portion 63 is provided with a connection port 631 for the connection end of the connection terminal 33 to extend out. The connection end is electrically connected to the circuit board 22.

[0115] It is understood that the connecting end of the connecting terminal 33 is the end of the connecting terminal 33 used to connect to the circuit board 22. The connecting port 631 allows the connecting end of the connecting terminal 33 to extend, thereby facilitating the connection between the connecting terminal 33 and the circuit board 22. In this application, by covering the connecting terminal 33 with the terminal protection part 63 of the soft protective sleeve 60, the connecting terminal 33 can be separated from the housing 10, providing shock absorption and anti-slip for the connecting terminal 33, preventing the connecting terminal 33 from being damaged by large impacts. At the same time, it can prevent the housing 10 from transmitting the impact force to the display screen 30 through the connecting terminal 33 when the brush handle falls, thus preventing the display screen 30 from being subjected to large vibration and impact.

[0116] In some embodiments, the display surface 311 includes a display area 311a and an edge area 311b surrounding the display area 311a, and a soft protective cover 60 covers the edge area 311b.

[0117] It is understandable that the display area 311a is the area on the display surface 311 used to display information, and the edge area 311b can be an area such as a bezel that does not have a display function. The soft protective cover 60 can also provide shock absorption protection for the edge area 311b. At the same time, the display area 311a is not blocked by the soft protective cover 60, so that the soft protective cover 60 can provide shock absorption protection for the display screen 30 as much as possible, while preventing the soft protective cover 60 from blocking the display area 311a.

[0118] In some embodiments, a limiting rib 70 is provided on the periphery of the soft protective sleeve 60. The limiting rib 70 abuts against the periphery of the placement groove 12 so that the soft protective sleeve 60 is more tightly connected to the housing 10, thereby making the display screen 30 more securely fixed and preventing the display screen 30 from becoming loose during use.

[0119] Secondly, based on the aforementioned brush handle, this application also provides an electric toothbrush, such as... Figure 10 As shown, the electric toothbrush includes a brush head 80 and a brush handle as described in any of the above embodiments. The brush head 80 is connected to a motor 23 for driving the brush head 80 to vibrate via the motor 23.

[0120] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A brush handle, characterized in that, include: A housing, the housing being configured to form a receiving cavity, and a placement groove communicating with the receiving cavity being provided on the outer peripheral surface of the housing; A motor bracket assembly is disposed within the receiving cavity, the motor bracket assembly including a bracket and a motor and circuit board disposed on the bracket; A display screen is disposed in the placement slot, the display surface of the display screen is disposed opposite to the motor bracket assembly, the circuit board is disposed on the side of the bracket close to the display screen and is electrically connected to the display screen, and the outer diameter or width of the display screen is d1; as well as, A light-transmitting cover is positioned opposite the display screen and is connected to the housing to seal the opening of the placement slot. The bracket has a first surface facing the display screen, and a first plane containing the first surface is located within the housing. The width of the first plane is d2, where d2 ≤ d1; and / or, The motor has a second surface facing the display screen, and a second plane containing the second surface is located within the housing. The width of the second plane is d3, where d3 ≤ d1; and / or, The width of the circuit board is d4, where d4 ≤ d1.

2. The brush handle according to claim 1, characterized in that, The peripheral wall of the placement slot is provided with a first clearance opening that communicates with the receiving cavity, and a portion of the display screen is inserted into the first clearance opening.

3. The brush handle according to claim 1, characterized in that, The peripheral wall of the placement slot is provided with a first clearance opening that communicates with the receiving cavity, and the display screen is electrically connected to the circuit board through the first clearance opening.

4. The brush handle according to claim 3, characterized in that, The first clearance opening is located on the side of the peripheral wall that is furthest from the head end of the housing; and / or, the first clearance opening is located on the side of the peripheral wall that is closer to the circuit board.

5. The brush handle according to claim 1, characterized in that, The bottom wall of the placement slot is provided with a second clearance opening, which communicates with the receiving cavity. The display screen is electrically connected to the circuit board through the second clearance opening.

6. The brush handle according to claim 5, characterized in that, The circuit board also includes a terminal block; The terminal block is located on the side of the circuit board near the display screen, and is electrically connected to the display screen through the second recessed opening, thereby electrically connecting the circuit board and the display screen; or, The display screen includes a screen body and connecting terminals. The screen body has the display surface. The connecting terminals are connected to the screen body. The terminal block is disposed on the side of the circuit board near the display screen. The terminal block is electrically connected to the connecting terminals through the second recessed opening, thereby electrically connecting the circuit board and the display screen; or... The terminal block is located on the side of the motor near the display screen. A first electrical connector is connected to the display screen. The first electrical connector is electrically connected to the terminal block through a second clearance opening. The circuit board is electrically connected to the terminal block through a second electrical connector, so as to be electrically connected to the display screen.

7. The brush handle according to claim 6, characterized in that, The terminal block is positioned near the second clearance opening.

8. The brush handle according to claim 5, characterized in that, The display screen is connected to a first electrical connector, which is electrically connected to the circuit board through a second clearance opening, so that the display screen is electrically connected to the circuit board. Wherein, at least a portion of the first electrical connector is bent and stacked in the direction of the depth of the placement groove.

9. The brush handle according to claim 5, characterized in that, A first clearance opening is provided on the peripheral wall of the placement slot. A portion of the display screen is inserted into the first clearance opening. A second clearance opening extends to the first clearance opening and communicates with the first clearance opening.

10. The brush handle according to claim 9, characterized in that, The second clearance opening extends away from the head end of the housing to the first clearance opening.

11. The brush handle according to claim 1, characterized in that, The outer diameter of the display screen is larger than the inner or outer diameter of the housing.

12. The brush handle according to claim 1, characterized in that, The peripheral wall of the placement slot includes: A connecting wall surface that extends away from the centerline of the placement slot; The first wall surface is located on the side of the connecting wall surface near the slot and is connected to the first end of the connecting wall surface; The second wall is located on the side of the connecting wall away from the slot and is connected to the second end of the connecting wall; The light-transmitting cover includes a supporting part and an insertion part. The supporting part is supported on the connecting wall and contacts the first wall. The insertion part is located on the side of the supporting part near the placement groove, and the insertion part is inserted into the placement groove and contacts the second wall.

13. The brush handle according to claim 12, characterized in that, The connecting wall is an annular surface that surrounds the placement groove.

14. The brush handle according to claim 1, characterized in that, The outer surface of the light-transmitting cover slopes downwards from the central area towards its periphery; or... The outer surface of the light-transmitting cover extends upwards and slopes from the central area towards its periphery; or... The distance between the top of the light-transmitting cover and the bottom of the placement groove is less than or equal to the distance between the opening of the groove and the bottom of the placement groove.

15. The brush handle according to claim 1, characterized in that, A soft protective cover is provided on the outer surface of the display screen.

16. The brush handle according to claim 15, characterized in that, The outer side of the display screen includes a display surface, a bottom surface, and a peripheral side surface. The bottom surface is disposed opposite to the display surface, and the peripheral side surface is located between the bottom surface and the display surface. The soft protective sleeve at least partially covers the bottom surface and the peripheral surface, and abuts against the wall of the placement groove.

17. The brush handle according to claim 16, characterized in that, The soft protective sleeve includes a bottom protective portion covering the bottom surface and a peripheral protective portion covering the peripheral side surface. The bottom protective portion and / or the peripheral protective portion are provided with a plurality of deformation notches, and the plurality of deformation notches are arranged at intervals along the periphery of the soft protective sleeve.

18. An electric toothbrush, characterized in that, It includes a brush head and a brush handle as described in any one of claims 1 to 17, wherein the brush head is drive-connected to the motor.

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