Oral cavity cleaning appliance handle and oral cavity cleaning appliance

Abstract

The invention relates to an oral cleaning appliance handle and an oral cleaning appliance. The oral cleaning appliance handle comprises a shell, a driving assembly and a sensing assembly. The shell is configured to be suitable for being held, and an inner cavity is formed in the shell; the driving assembly is arranged in the inner cavity; the driving assembly comprises a driving motor and a motor shell; the driving motor comprises an output shaft extending along a first axis; the driving motor is mounted in the inner cavity through a motor shell; the sensing assembly comprises an elastic sheet and a sensor arranged on the elastic sheet; at least one end of the elastic piece is configured to be installed in cooperation with the driving assembly, the output shaft is configured to indirectly drive the elastic piece to deform under the action of external force, and the sensor is configured to conduct stress induction based on the deformation quantity of the elastic piece. According to the invention, the circuit connecting piece is effectively prevented from being dragged when the output shaft moves, so that the handle can adapt to more types of driving motors, and the application range is greatly widened.

Description

Technical Field

[0001] The present disclosure relates to the technical field of oral cleaning, and in particular to a handle of an oral cleaning appliance; the present disclosure also relates to an oral cleaning appliance. Background Art

[0002] As living standards improve, people's awareness of oral care is growing, and a wider variety of oral cleaning tools are becoming available on the market. For example, in an electric toothbrush, the drive motor in the handle drives the toothbrush head to oscillate or vibrate. To better protect the user's dental health and increase brushing comfort, sensors can be used to detect brushing force and alert the user if the force is too strong.

[0003] In the prior art, sensors are typically mounted on the output shaft of the drive motor and connected to the control board using circuit connectors. However, when the output shaft is in operation, it moves with the sensor, thereby pulling on the circuit connectors. This mounting method is no longer suitable for drive motors with output shafts that can rotate through large angles, even 360°. Furthermore, mounting a sensor on the output shaft is complex and difficult, and can easily lead to insensitive and inaccurate pressure sensing. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present disclosure provides an oral cleaning device handle and an oral cleaning device.

[0005] According to a first aspect of the present disclosure, there is provided an oral cleaning appliance handle comprising: a housing configured to be grippable, wherein an inner cavity is provided in the housing; a drive assembly disposed in the inner cavity; the drive assembly comprising a drive motor and a motor housing; the drive motor comprising an output shaft extending along a first axis; the drive motor being mounted in the inner cavity through the motor housing; The sensing component includes a spring and a sensor arranged on the spring; at least one end of the spring is constructed to be installed in cooperation with the driving component, the output shaft is constructed to indirectly drive the spring to deform under the action of an external force, and the sensor is configured to sense force based on the deformation of the spring.

[0006] In one embodiment of the present disclosure, the spring sheet includes a first end and a second end that are relatively arranged, and the first end is constructed to be fixedly connected to the motor housing; the drive motor is configured to apply a force to the second end and / or a position on the spring sheet adjacent to the second end under the action of an external force, so as to cause the spring sheet to deform.

[0007] In one embodiment of the present disclosure, the elastic sheet is configured to extend along the first axis direction, the first end is configured to be away from the output shaft, and the second end is configured to be close to the output shaft.

[0008] In one embodiment of the present disclosure, the elastic sheet is configured to use the position where it is connected to the motor housing as a deformation fulcrum during the deformation process.

[0009] In one embodiment of the present disclosure, a protrusion is provided on the first direction side wall of the driving motor, and the protrusion is constructed to be pre-pressed to a position on the spring sheet adjacent to the second end; the output shaft is configured to drive the protrusion to move in the first direction under the action of an external force to compress the spring sheet to deform.

[0010] In one embodiment of the present disclosure, the driving assembly includes a flexible sleeve, which is configured to at least partially wrap the driving motor; and the protrusion is provided on the flexible sleeve.

[0011] In one embodiment of the present disclosure, the spring sheet includes a connecting portion provided at the second end, and the connecting portion is configured to extend to connect to the drive motor; the drive motor is configured to drive the spring sheet to deform through the connecting portion.

[0012] In one embodiment of the present disclosure, the connecting portion is constructed to be fixedly connected to the side of the drive motor where the output shaft is provided; an avoidance area is provided on the connecting portion, and the avoidance area is configured to avoid the extension path of the output shaft.

[0013] In one embodiment of the present disclosure, an elastic arm is provided on the motor housing, and the elastic arm includes a fixed end and a free end that are relatively arranged; the fixed end is constructed to be fixedly connected to the motor housing, and the free end is constructed to be pre-pressed between the spring sheet and the outer shell; under the driving action of the output shaft, the free end is configured to be able to apply a force to the spring sheet to cause the spring sheet to deform.

[0014] In one embodiment of the present disclosure, the drive motor is constructed to be fixedly mounted on the motor housing, and the output shaft is constructed to drive the drive assembly as a whole to move relative to the housing under the action of an external force; under the elastic force of the elastic arm, the free end is constructed to be able to always maintain contact with the spring sheet and the inner wall of the housing.

[0015] In one embodiment of the present disclosure, when the output shaft is not subjected to external force, the free end is configured to apply a preset force to the spring sheet; during the movement of the drive assembly, the force applied by the free end to the spring sheet is configured to change, so as to cause the spring sheet to deform.

[0016] In one embodiment of the present disclosure, the elastic piece is configured to use the position where it contacts the free end as a deformation fulcrum during the deformation process.

[0017] In one embodiment of the present disclosure, the spring sheet includes a first end and a second end that are relatively arranged, the first end is constructed to be fixedly connected to the motor housing and / or the drive motor, and the second end is constructed to extend between the motor housing and the elastic arm; the output shaft is constructed to drive the first end to move relative to the housing under the action of an external force, so that the spring sheet is deformed.

[0018] In one embodiment of the present disclosure, the sensor is configured to be fixed on the elastic sheet at a position adjacent to the first end.

[0019] In one embodiment of the present disclosure, the elastic sheet is configured to extend along the first axis.

[0020] In one embodiment of the present disclosure, two elastic arms are provided, and the free ends of the two elastic arms are respectively connected to the opposite ends of the spring sheet; under the driving action of the output shaft, the two free ends are configured to be able to apply force to the opposite ends of the spring sheet respectively to cause the spring sheet to deform.

[0021] In one embodiment of the present disclosure, the sensor is configured to be fixed at a middle position of the elastic sheet.

[0022] In one embodiment of the present disclosure, the elastic piece is configured to extend along a second axis perpendicular to the first axis.

[0023] In one embodiment of the present disclosure, the two elastic arms are configured to be connected to each other via a connecting arm, and the connecting arm is configured to be located between the elastic sheet and the housing.

[0024] In one embodiment of the present disclosure, a limiting portion is provided on the connecting arm, and a mating portion for mating with the limiting portion is provided on the inner wall of the outer shell; the limiting portion is constructed to at least limit the freedom of movement of the motor housing in the circumferential direction relative to the outer shell.

[0025] In one embodiment of the present disclosure, the driving motor is a servo motor.

[0026] In one embodiment of the present disclosure, a control main board is further included; the control main board is constructed to be located in the inner cavity and is constructed to be communicatively connected to the sensor; the control main board is configured to determine the pressure value received by the output shaft based on the electrical signal output by the sensor; when the pressure value is greater than a threshold value, the control main board is configured to issue a prompt signal.

[0027] According to a second aspect of the present disclosure, there is also provided an oral cleaning appliance, comprising: The oral cleaning appliance handle according to the first aspect of the present disclosure; A brush head is provided at the end of the handle of the oral cleaning appliance and is configured to be connected to the output shaft.

[0028] In one embodiment of the present disclosure, the brush head is configured to drive the output shaft to move in a direction away from the brush head under the action of an external force, so as to drive the elastic piece to deform.

[0029] One beneficial effect of the present disclosure is that, by providing a spring clip that is mounted in conjunction with the drive assembly, the output shaft can indirectly cause the spring clip to deform under the action of an external force. The sensor provided on the spring clip can sense the force based on the deformation of the spring clip. This overcomes the design limitation of the prior art where "the sensor moves directly with the output shaft," effectively avoiding the involvement of circuit connectors when the output shaft moves, allowing the handle to adapt to more types of drive motors and significantly broadening its scope of application. Furthermore, compared to the high-precision installation process of installing a sensor on the output shaft, the coordinated installation of the spring clip and the drive assembly disclosed in the present disclosure is easier to operate, thereby simplifying the installation process and reducing production difficulty and cost.

[0030] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0032] Figure 1 This is a schematic structural diagram of a handle of an oral cleaning device provided in one embodiment of the present disclosure; Figure 2 is a cross-sectional view of an oral cleaning appliance provided by an embodiment of the present disclosure; Figure 3 is an exploded view of an oral cleaning appliance provided by an embodiment of the present disclosure; Figure 4 is a partial cross-sectional view of a driving assembly and a sensing assembly provided in one embodiment of the present disclosure; Figure 5is a structural schematic diagram of a driving assembly and a sensing assembly provided by an embodiment of the present disclosure; Figure 6 is a partial cross-sectional view of a handle of an oral cleaning appliance provided by an embodiment of the present disclosure; Figure 7 is a structural schematic diagram of a cover plate provided by an embodiment of the present disclosure; Figure 8 is a partial structural schematic diagram of a driving assembly and a sensing assembly provided by an embodiment of the present disclosure; Figure 9 is a structural schematic diagram of a cover plate and a sensing assembly provided by an embodiment of the present disclosure; Figure 10 is a structural schematic diagram of a cover plate provided by another embodiment of the present disclosure; Figure 11 is a structural schematic diagram of a cover plate provided by another embodiment of the present disclosure; Figure 12 is a structural schematic diagram of a driving assembly and a sensing assembly provided by another embodiment of the present disclosure; Figure 13 is a partial cross-sectional view of a handle of an oral cleaning appliance provided by another embodiment of the present disclosure.

[0033] Figures 1 to 13 The one-to-one correspondence between the names of the components and the reference numerals is as follows: 100, handle of an oral cleaning appliance; 1, shell; 10, inner cavity; 2, driving assembly; 21, driving motor; 211, output shaft; 22, motor housing; 221, cover plate; 23, flexible sleeve; 231, protrusion; 24, elastic arm; 241, fixed end; 242, free end; 25, connecting arm; 251, limiting portion; 252, matching groove; 3, sensing assembly; 31, elastic sheet; 311, first end; 312, second end; 313, connecting portion; 32, sensor; 33, circuit connecting piece; 34, fixing nail; 4, control mainboard; 5, battery; 6, soft rubber gasket; 200, brush head; 201, bristles. DETAILED DESCRIPTION

[0034] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of the components and steps set forth in these embodiments are not limiting to the scope of the present disclosure unless otherwise specifically stated.

[0035] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting to the scope of the present disclosure and its applications or uses.

[0036] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art(s) can not be discussed in detail herein. However, where appropriate, the techniques, methods, and apparatus should be considered as being part of the specification.

[0037] It should be noted that like reference numerals and letters refer to like items throughout the several views, and each of the several views can not be discussed in detail in the interest of brevity and clarity.

[0038] In the present document, "upper", "lower", "front", "back", "left", "right", and the like are used to denote relative positions among the relevant parts, and do not limit the absolute positions of the relevant parts.

[0039] In the present document, "first", "second", and the like are used to distinguish between the relevant parts from each other, and do not indicate the importance and order, and the premise of each other.

[0040] In the present document, "equal", "same", and the like are not strictly limited in the mathematical and / or geometric sense, but also include the errors allowed by the person skilled in the art in manufacturing or use.

[0041] The present disclosure provides an oral cleaning appliance handle and an oral cleaning appliance, wherein the oral cleaning appliance comprises the oral cleaning appliance handle. The specific structure and working principle of the oral cleaning appliance provided by the present disclosure will be described in detail below in combination with the drawings, and the specific structure and working principle of the oral cleaning appliance handle provided by the present disclosure will be introduced together.

[0042] The present disclosure provides an oral cleaning appliance, which can be an electric toothbrush, a brushing all-in-one machine, or the like, for performing oral cleaning. Referring to Figures 1 to 3 , the oral cleaning appliance comprises an oral cleaning appliance handle 100 and a brush head 200. The oral cleaning appliance handle 100 comprises a housing 1, a driving assembly 2, and a sensing assembly 3. The housing 1 is configured to be suitable for holding, and a user can hold the housing 1 to operate the oral cleaning appliance to perform oral cleaning work. As shown in Figure 2 , the housing 1 is provided with an inner cavity 10 for accommodating various components in the oral cleaning appliance handle 100.

[0043] As shown in Figure 2 , the driving assembly 2 is arranged in the inner cavity 10. Specifically, as shown in Figure 3 , the driving assembly 2 comprises a driving motor 21 and a motor housing 22. The driving motor 21 comprises an output shaft 211 extending along a first axis. Referring to Figure 4In the viewing direction, the X-axis extending transversely is the first axis. The output shaft 211 can be used to connect the brush head 200 of the oral cleaning appliance. Specifically, the brush head 200 is disposed at the end of the oral cleaning appliance handle 100 and is configured to be connected to the output shaft 211. The brush head 200 may include bristles 201 formed by a plurality of bristle tufts, which are used to contact the teeth to achieve a toothbrushing function. The output shaft 211 of the drive motor 21 can drive the brush head 200 to swing, thereby improving the cleaning effect.

[0044] In a specific embodiment of the present disclosure, the drive motor 21 may be a servo motor that controls the swing speed of the output shaft 211 with high precision. This allows the output shaft 211 to reciprocate forward and reverse about the first axis by a predetermined angle, thereby outputting swinging power to drive the brush head 200 to sweep and vibrate. This allows the user to easily remove dirt from the toothbrush without moving their wrist while brushing, ensuring a thorough cleaning effect.

[0045] The driving motor 21 is installed in the inner cavity 10 through the motor housing 22. Specifically, the motor housing 22 may include a mounting bracket provided inside the housing 1, and the mounting bracket may be used to install various components in the inner cavity 10. In one embodiment of the present disclosure, Figure 2 and Figure 8 The motor housing 22 may further include a cover plate 221 assembled on the mounting bracket. The cover plate 221 and at least a portion of the mounting bracket enclose a first mounting space for accommodating the drive motor 21. The cover plate 221 may be fixed to the mounting bracket by a plurality of screws and, together with the mounting bracket, install the drive motor 21 in the first mounting space. Figure 2 and Figure 3 A second installation space for accommodating the battery 5 can also be provided on the side of the installation bracket relatively away from the output shaft 211. The first installation space can be connected to the second installation space, so that the battery 5 in the second installation space can power the drive motor 21 in the first installation space.

[0046] The sensing assembly 3 includes a spring clip 31 and a sensor 32 mounted on the spring clip 31. The spring clip 31 exhibits outstanding elasticity and sufficient hardness, thereby simultaneously meeting the core requirements of elastically transmitting external forces and ensuring stable deformation with sufficient hardness. The spring clip 31 can be made of materials such as stainless steel, titanium alloy, plastic, and glass fiber reinforced nylon. At least one end of the spring clip 31 is configured to mate with the drive assembly 2. The output shaft 211 is configured to indirectly deform the spring clip 31 under the action of an external force. The sensor 32 is configured to sense force based on the deformation of the spring clip 31. The output shaft 211 moves under the action of an external force, causing the spring clip 31 to deform during this movement. The sensor 32 can determine the force applied to the output shaft 211 based on the deformation of the spring clip 31. The sensor 32 can be a strain gauge sensor, a piezoelectric sensor, a capacitive sensor, a displacement sensor, or any other type of sensor capable of sensing the deformation of the spring clip 31. This disclosure does not limit the specific type of sensor 32.

[0047] In one embodiment of the present disclosure, the brush head 200 is configured to drive the output shaft 211 to move away from the brush head 200 under the action of an external force, so as to drive the elastic piece 31 to deform. Figure 2 As shown, a first direction S1 and a second direction S2 are defined, with the bristles 201 extending in the second direction S2. When a user brushes their teeth, the front side of the brush head 200 (i.e., the side provided with the bristles 201) contacts the user's teeth, thereby applying a force in the first direction S1 to the output shaft 211, causing the output shaft 211 to move away from the brush head 200. It is understood that the greater the force with which the user brushes, the greater the movement of the output shaft 211, causing the output shaft 211 to cause a greater deformation of the spring 31, allowing the sensor 32 to detect a greater brushing force.

[0048] In order to better protect the user's dental health and increase the comfort of brushing, it is necessary to remind the user when the sensor detects that the brushing force is too strong. Figure 2 and Figure 3 The oral cleaning appliance handle 100 further includes a control board 4, which is configured to be located in the inner cavity 10 and to be communicatively connected to the sensor 32. Figure 8 The sensing component 3 also includes a circuit connector 33, which can be an FPC board. The circuit connector 33 is used to connect the sensor 32 to the control motherboard 4, and can transmit the information detected by the sensor 32 to the control motherboard 4 in the form of an electrical signal. The circuit connector 33 can be welded on the control motherboard 4.

[0049] The control board 4 can be fixed on the mounting bracket and connected with various components in the oral cleaning appliance handle 100 to control the coordinated operation of the components. Figure 3 and Figure 5 In the direction of the first axis, a control circuit can be provided on the end of the drive motor 21 away from the output shaft 211. The control mainboard 4 can be welded to the control circuit located on the drive motor 21 to control the drive motor 21 to turn on or off. In addition, the handle of the oral cleaning device can also be provided with a display screen for displaying visual information, a light-emitting element for displaying light signals, etc. The control mainboard 4 can be communicatively connected to the display screen, the light-emitting element, and other components to control the visual information displayed on the display screen and to control the light-emitting element to turn on or off.

[0050] The control board 4 is configured to determine the pressure applied to the output shaft 211 based on the electrical signal output by the sensor 32. When the pressure value exceeds a threshold, the control board 4 is configured to issue a prompt signal. Specifically, the prompt signal can be displayed on the display screen, or can be issued by activating a light-emitting element, or can be issued by vibrating the handle 100 of the oral cleaning device. When the pressure value exceeds the threshold, it means that the user is brushing too hard. To remind the user to reduce the brushing force, the control board 4 can issue a prompt signal. The user can then notice the prompt signal and adjust the brushing force in a timely manner, which is beneficial to the health of the teeth and periodontium.

[0051] In a specific embodiment of the present disclosure, the complete process of force sensing by the sensor component 3 is as follows: ① External force transmission stage: When the user uses the oral cleaning device to brush his teeth, the brush head 200 will transmit the reaction force to the output shaft 211 of the drive motor 21. Since the output shaft 211 cooperates with the spring 31 through the drive component 2, the output shaft 211 will drive the drive component 2 to produce a small displacement after being subjected to force, and then indirectly push the spring 31 to deform (such as the middle area of ​​the spring 31 bends downward, or one end of the spring 31 bends relative to the other end).

[0052] ② Force sensing stage: The sensor 32 is set in the deformation sensitive area of ​​the shrapnel 31. Taking the sensor 32 as an optical displacement sensor as an example: the position where the light is reflected back to the sensor is fixed. When the shrapnel 31 is deformed, the position of the reflected light will also change accordingly. The sensor 32 can calculate the specific deformation of the shrapnel 31 by calculating the offset of the reflected light; the sensor 32 can convert the deformation into a corresponding voltage signal and transmit it to the control motherboard 4 through the circuit connector 33.

[0053] ③Signal processing stage: After the weak voltage signal is processed by the amplification circuit and the filter circuit, it is transmitted to the analog-to-digital converter of the control mainboard 4. The analog-to-digital converter converts the analog voltage signal into a digital signal, and then calculates the real-time pressure value of the output shaft 211 in combination with the pre-calibrated corresponding relationship between the deformation amount of the sheet 31 and the pressure value of the output shaft 211.

[0054] ④Closed-loop feedback stage: When the control mainboard 4 determines that the pressure value of the output shaft 211 exceeds the threshold value, a reminder mechanism (such as a display screen prompt, a light-emitting piece flashing, a handle vibrating, etc.) is triggered to prompt the user to reduce the brushing force. At the same time, after the external force acting on the output shaft 211 is reduced, the sheet 31 can restore its original shape due to its elasticity, and the sensor 32 enters the next detection cycle.

[0055] The present disclosure sets the sheet 31 which is installed in cooperation with the driving assembly 2. The output shaft 211 can indirectly drive the sheet 31 to deform under the action of external force. The sensor 32 arranged on the sheet 31 can sense the force based on the deformation amount of the sheet 31. Thus, the design limitation of the prior art that the sensor 32 directly moves with the output shaft 211 is broken, the pulling of the circuit connecting piece 33 by the output shaft 211 during movement is effectively avoided, the oral cleaning appliance handle 100 can be adapted to more types of driving motors 21, and the application range is greatly widened. In addition, compared with the high-precision installation process of installing the sensor 32 on the output shaft 211, the cooperation and installation of the sheet 31 and the driving assembly 2 are more easy to operate, thereby simplifying the installation process and reducing the production difficulty and cost.

[0056] Further, the sheet 31 as a force transmission and deformation carrier can stably receive the external force indirectly transmitted by the output shaft 211 and generate a corresponding deformation amount. The sensor 32 senses the force based on the deformation amount, avoids the interference of the movement of the output shaft 211 on the sensing signal, makes the brushing force detection more stable and the data more accurate, and thus more reliably realizes the function of reminding the user when the force is too large, thereby better protecting the user's dental health and improving the brushing comfort.

[0057] The main working mode of the oral cleaning appliance and the oral cleaning appliance handle 100 of the present disclosure is introduced above. In order to more clearly illustrate the internal structure of the oral cleaning appliance handle 100, four different assembly modes of the sheet 31 and the driving assembly 2 will be introduced in detail in the following four embodiments, and in each assembly mode, how the output shaft 211 indirectly drives the sheet 31 to deform under the action of external force will be introduced.

[0058] Embodiment one Reference Figure 4The elastic sheet 31 includes a first end 311 and a second end 312 arranged oppositely. In this embodiment, the elastic sheet 31 is configured to extend along the first axis direction (i.e. the X-axis direction), the first end 311 is configured to be away from the output shaft 211, and the second end 312 is configured to be close to the output shaft 211. As mentioned above, the first axis is the central axis of the output shaft 211 of the driving motor 21, and the elastic sheet 31 extends along the first axis direction in a "horizontal strip shape", thereby achieving efficient space utilization.

[0059] Specifically, the shell 1 of the oral cleaning appliance handle 100 usually has a diameter of only 20-30 mm, and the inner cavity 10 has very limited space. The layout of the elastic sheet 31 extending along the first axis (X-axis) avoids occupying too much space in the radial direction, thereby enabling compact arrangement of components such as the battery 5 and the control mainboard 4, and avoiding layout conflicts of components in the inner cavity 10. At the same time, the shell 1 does not need to increase the diameter due to the design of the elastic sheet 31, thereby not affecting the holding feeling of the shell 1.

[0060] The first end 311 is configured to be fixedly connected to the motor housing 22. Specifically, a hole can be formed on the elastic sheet 31 adjacent to the first end 311, and a corresponding hole is also formed on the motor housing 22, and a fixing nail 34 is inserted through the two holes, thereby connecting the first end 311 of the elastic sheet 31 to the motor housing 22 through the fixing nail 34. After connection, the first end 311 and the motor housing 22 form a rigid whole and have substantially no relative displacement. The rigid fixing design of the first end 311 and the motor housing 22 avoids loosening and deviation of the elastic sheet 31 during vibration of the driving motor 21 or transmission of external force, and ensures that the elastic sheet 31 is always in the preset detection position, thereby improving the reference stability of force sensing.

[0061] The second end 312 is configured to be mounted in conjunction with the drive motor 21, and the output shaft 211 is configured to, under the action of an external force, drive the drive motor 21 to move relative to the motor housing 22, thereby deforming the spring piece 31. Specifically, the drive motor 21 is configured to apply a force to the second end 312 and / or a position on the spring piece 31 adjacent to the second end 312, under the action of an external force, to deform the spring piece 31. When a user brushes their teeth, the output shaft 211 is subjected to a force, and the drive motor 21 is slightly displaced by the force, thereby compressing the second end 312 of the spring piece 31, causing the spring piece 31 to transform from an initially straight state to a curved state with a certain curvature. In this way, the efficiency of force transmission is optimized. Specifically, the present disclosure limits the force application position to the second end 312 and the adjacent area, so that the spring piece 31 forms a clear force-bearing structure of "the first end 311 is used for fixing, and the second end 312 is used for deformation". The external force does not need to be dispersed and transmitted to the entire spring piece 31, but only needs to act on the second end 312 and the adjacent area to cause obvious deformation. The sensor 32 can capture tiny force changes more accurately, solving the pain point of insensitive pressure sensing in the prior art.

[0062] In one embodiment of the present disclosure, the spring 31 is constructed so that during deformation, the location where it is connected to the motor housing 22 serves as a deformation fulcrum. In this embodiment, the location where the fixing pin 34 is provided serves as the deformation fulcrum. When an external force acts on the second end 312 of the spring 31, the spring 31 undergoes a lever-like bending with the deformation fulcrum as the center. The deformation fulcrum remains fixed, and the second end 312 can warp. The deformation of the spring 31 gradually increases from the deformation fulcrum toward the second end 312. The lever-like deformation structure can convert the tiny external force transmitted by the output shaft 211 into a significant deformation of the second end 312. The sensor 32 can detect force without detecting extremely small deformations, avoiding the problem of difficulty in capturing small forces and improving sensing sensitivity. In addition, the fixed deformation fulcrum ensures that each deformation of the spring 31 follows a preset trajectory, ensuring the consistency of the deformation trajectory, avoiding irregular deformations such as twisting and offset that may occur in the spring 31 without a fixed fulcrum, and improving the accuracy of force detection.

[0063] Further, the sensor 32 is configured to be fixed to the elastic sheet 31 at a position adjacent to the deformation fulcrum, for example, the sensor 32 can be pasted at a middle position of the elastic sheet 31 adjacent to the deformation fulcrum. It should be noted that the position is in the linear sensitive area of the deformation of the elastic sheet 31, because in the lever deformation, the closer to the deformation fulcrum, the closer the corresponding relationship between the deformation and the external force to the ideal linearity, and far from the deformation fulcrum, because the deformation degree is larger, it is easy to cause larger linear deviation due to excessive bending. The present disclosure sets the sensor 32 at a position adjacent to the deformation fulcrum, thereby converting the pressure signal into a high gradient and linearized local stress field through mechanical design, and the deformation signal of the elastic sheet 31 captured by the sensor 32 can more accurately reflect the actual brushing force, avoiding the core pain point of inaccurate pressure sensing in the prior art, and especially adapting to the need of distinguishing subtle force differences of oral cleaning appliances.

[0064] In one embodiment of the present disclosure, as shown in Figure 4 The elastic sheet 31 is configured to be located on the first direction S1 side of the driving assembly 2, and the output shaft 211 is configured to move to the first direction S1 under the action of an external force to drive the elastic sheet 31 to deform. Specifically, a protrusion 231 is arranged on the first direction S1 side wall of the driving motor 21, and the protrusion 231 is configured to be pre-pressed to a position adjacent to the second end 312 of the elastic sheet 31. The output shaft 211 is configured to drive the protrusion 231 to move to the first direction under the action of an external force to press the elastic sheet 31 to deform. When the user brushes with a larger force, the output shaft 211 will drive the driving motor 21 as a whole to move to the first direction S1 under the action of the reaction force, at this time, the protrusion 231 moves downward synchronously with the driving motor 21, and applies a directional pressure to the elastic sheet 31, forcing the elastic sheet 31 to bend downward with the position connected with the motor housing 22 as the deformation fulcrum, and the deformation amount is proportional to the displacement amount of the driving motor 21.

[0065] The present disclosure can pre-set the elastic sheet 31 to be installed in a state of being attached to the protrusion 231, and there is no initial gap between the two, so that when the output shaft 211 is stressed, the protrusion 231 can quickly transmit the pressure to the elastic sheet 31, avoiding the problem of response delay, and realizing real-time capture of sudden changes in brushing force. In addition, the pre-pressing design of the protrusion 231 allows a small positional deviation during assembly of the elastic sheet 31, and the pre-pressing force can automatically adjust the attachment state of the protrusion 231 and the elastic sheet 31, so that high-precision positioning and assembly of the elastic sheet 31 are not required, reducing the assembly difficulty during production.

[0066] In one embodiment of the present disclosure, the driving assembly 2 comprises a flexible sleeve 23 configured to at least partially wrap the driving motor 21, and a protrusion 231 arranged on the flexible sleeve 23. The flexible sleeve 23 can be made of soft and elastic materials such as silica gel or rubber. The flexible sleeve 23 is used to wrap the driving motor 21, which helps to buffer the vibration of the driving motor 21 during operation. The protrusion 231 can be integrally formed on the end face of the flexible sleeve 23 facing the elastic sheet 31 (i.e. on the end face in the first direction S1), and the protrusion 231 can be made of the same material as the flexible sleeve 23. The driving motor 21 generates high-frequency and tiny vibration during operation. The flexible sleeve 23 can absorb part of the vibration energy, thereby avoiding the vibration from being transmitted to the elastic sheet 31 to cause false touch deformation, causing the sensor 32 to misjudge, and improving the detection accuracy. In addition, since the flexible sleeve 23 and the protrusion 231 are integrally formed, the flexible sleeve 23 only needs to be directly sleeved on the driving motor 21 during assembly, without the need to separately install the protrusion 231, thereby reducing the assembly difficulty.

[0067] Embodiment Two The main difference between this embodiment and Embodiment One is that the position of the driving motor 21 to apply force to the elastic sheet 31 under the action of external force is different. In Embodiment One, the force is transmitted by pressing the position of the elastic sheet 31 adjacent to the second end 312 through the protrusion 231; while in this embodiment, the driving motor 21 can accurately apply force to the second end 312 of the elastic sheet 31.

[0068] In one embodiment of the present disclosure, referring to Figure 5 , the elastic sheet 31 comprises a connecting portion 313 arranged on the second end 312, the connecting portion 313 is configured to extend to be connected with the driving motor 21, and the driving motor 21 is configured to drive the elastic sheet 31 to deform through the connecting portion 313. In this embodiment, the first end 311 is also configured to be fixedly connected to the motor housing 22, and the second end 312 is provided with the connecting portion 313 directly connected with the driving motor 21, thereby realizing that the driving motor 21 accurately applies force to the second end 312 of the elastic sheet 31. The connecting portion 313 can be integrally formed with the elastic sheet 31, and both can be made of the same material, thereby enabling the connecting portion 313 to directly drive the second end 312 of the elastic sheet 31 to move without the need to additionally arrange a connecting structure.

[0069] Specifically, the first end 311 of the elastic sheet 31 can be fixed to the motor housing 22 by screws, welding or the like, thereby forming a rigid connection, and it can be considered that there is no relative displacement between the first end 311 of the elastic sheet 31 and the motor housing 22; the second end 312 of the elastic sheet 31 is rigidly fixed to the driving motor 21 through the connecting portion 313, so that the driving motor 21 and the second end 312 of the elastic sheet 31 become a synchronous motion unit. During the user's brushing process, the reaction force of the brush head 200 is transmitted to the driving motor 21 along the output shaft 211, and the driving motor 21 can be slightly displaced relative to the motor housing 22, thereby driving the second end 312 of the elastic sheet 31 to be displaced relative to the first end 311, and the elastic sheet 31 is deformed accordingly. The degree of deformation of the elastic sheet 31 is directly proportional to the displacement of the driving motor 21 relative to the motor housing 22.

[0070] The present disclosure avoids the dispersion or delay of force in the transmission process through the linear transmission chain of "output shaft 211 force → driving motor 21 relative to motor housing 22 motion → connecting portion 313 motion transmission → elastic sheet 31 deformation", and improves the detection accuracy. The structure provided in the embodiment effectively simplifies the force transmission path, and the double rigid fixing structure of the driving motor 21 and the motor housing 22 at both ends of the elastic sheet 31 shortens the force transmission path. In addition, when the output shaft 211 is stressed, the driving motor 21 can quickly transmit the pressure to the elastic sheet 31, avoiding the problem of response delay, improving the response speed, and realizing real-time capture of sudden changes in brushing force.

[0071] In one embodiment of the present disclosure, as shown in Figure 5 The connecting portion 313 is configured to be fixedly connected to the side surface of the driving motor 21 provided with the output shaft 211. Thus, the connecting portion 313 is fixed at the position closest to the external force action point (i.e. the output shaft 211), so that the force transmission path is shortened, the loss of force in the transmission process is reduced, and the corresponding relationship between the deformation of the elastic sheet 31 and the brushing force is more accurate. During the movement of the driving motor 21, in order to avoid interference between the output shaft 211 and the connecting portion 313, the present disclosure provides a relief area on the connecting portion 313, which is configured to avoid the extension path of the output shaft 211.

[0072] The connecting portion 313 can adopt a U-shaped structure design, and the opening in the middle of the U-shaped structure is the relief area, and the positions of the two ends of the U-shaped structure are used to be fixedly connected to the end surface of the driving motor 21. The U-shaped relief area provides a separate rotating space for the output shaft 211, and the output shaft 211 will not rub or collide with the connecting portion 313 during normal operation. The U-shaped relief area realizes the coexistence of the output shaft 211 and the connecting portion 313 through local hollow design, so that the size of the connecting portion 313 does not need to be increased for avoiding the output shaft 211, and the compact space of the inner cavity 10 of the oral cleaning appliance handle 100 is adapted.

[0073] In one embodiment of the present disclosure, the connecting portion 313 is configured to extend along the second direction S2 to connect to the drive motor 21. The drive motor 21 is configured to drive the connecting portion 313 to move in the first direction S1, thereby causing the elastic fragment 31 to deform. The elastic fragment 31 is arranged substantially parallel to the output shaft 211. The extending direction of the connecting portion 313 is substantially perpendicular to the elastic fragment 31. The second end 312 is fixed to the end face of the drive motor 21. When the drive motor 21 moves in the first direction S1, the force can be directly transmitted to the second end 312 of the elastic fragment 31 along a vertical path, thereby improving the sensing sensitivity. In addition, the vertical extension structure of the connecting portion 313 does not occupy the longitudinal space of the oral cleaning device handle 100, thereby improving the space utilization of the inner cavity 10.

[0074] Example 3 refer to Figure 6 and Figure 7 The motor housing 22 is provided with an elastic arm 24. As previously mentioned, the motor housing 22 includes a cover plate 221 assembled on the mounting bracket, and the elastic arm 24 can be provided on the cover plate 221. The elastic arm 24 is in the shape of an elongated strip and has deformable elastic properties. The elastic arm 24 includes a fixed end 241 and a free end 242 that are arranged opposite to each other. The free end 242 is configured to be pre-pressed between the spring piece 31 and the housing 1. Driven by the output shaft 211, the free end 242 is configured to apply a force to the spring piece 31, causing the spring piece 31 to deform.

[0075] Specifically, the fixed end 241 is constructed to be fixedly connected to the motor housing 22. The fixed end 241 is rigidly connected to the motor housing 22. For example, it can be fixed to the cover plate 221 by means of injection molding, screw fixing, welding, etc., thereby ensuring that the fixed end 241 will not move relative to the motor housing 22. The free end 242 naturally extends between the spring 31 and the housing 1, and is in a pre-stressed state after assembly. The free end 242 can simultaneously contact and cooperate with the surface of the spring 31 and the inner wall of the housing 1, and form a pre-tightening force through the elastic properties of the elastic arm 24 itself, so that the three remain in contact. When the output shaft 211 is subjected to an external force, the output shaft 211 will drive the drive assembly 2 to change position. At this time, the free end 242 of the elastic arm 24 is constrained by the inner wall of the housing 1 and cannot move synchronously with the drive assembly 2, thereby applying a force to the spring 31, forcing the spring 31 to bend and deform.

[0076] By providing an elastic arm 24, the present invention completely eliminates the gap between the spring 31 and the transmission component through the pre-stressed state of the elastic arm 24, avoiding the response lag problem of "external force must first overcome the gap before it can push the spring 31." This ensures that changes in brushing force are transmitted to the spring 31 in real time, improving the timeliness of the response of the sensor 32. Furthermore, the elastic arm 24 itself is elastic and can cushion external force impacts through deformation, thus avoiding excessive localized force and permanent deformation of the spring 31 caused by rigid transmission, and extending the service life of the spring 31.

[0077] In one embodiment of the present disclosure, the drive motor 21 is configured to be fixedly mounted to the motor housing 22, and the output shaft 211 is configured to drive the entire drive assembly 2 relative to the housing 1 under the action of an external force. During movement of the drive assembly 2, the free end 242 is configured to maintain contact with the spring 31 and the inner wall of the housing 1 under the elastic force of the elastic arm 24. Specifically, the drive motor 21 can be rigidly connected to the motor housing 22 via a fixed structure (such as a screw lock or a slot-type positioning mechanism), forming an integral drive assembly 2 that cannot move relative to each other. The output shaft 211 extends out of the motor housing 22. When the output shaft 211 is subjected to an external force, it causes the entire drive assembly 2 (drive motor 21 + motor housing 22) to move relative to the housing 1. Because the free end 242 of the elastic arm 24 is in constant contact with the inner wall of the housing 1, its movement trajectory is constrained by the inner wall of the housing 1 during movement of the drive assembly 2. At the same time, its own elasticity maintains contact with the spring 31, preventing it from losing contact. The design of the overall movement of the drive component 2 in this embodiment avoids the problem of the drive motor 21 moving alone and being misaligned with the motor housing 22, and simplifies the force transmission path to "drive component 2 as a whole → elastic arm 24 → spring 31", reducing the dispersion and loss of force during the transmission process, ensuring that even a small brushing force can effectively drive the spring 31 to deform, thereby improving the sensitivity of force sensing. In addition, the continuous contact feature of the free end 242 of the elastic arm 24 eliminates the signal fluctuation of the sensor 32 caused by the "contact / separation" state switching, ensuring the stability of the detection signal, and reducing the risk of false detection and missed detection caused by contact interruption. At the same time, the relative movement space between the drive component 2 and the housing 1 provides sufficient margin for the deformation of the elastic arm 24 and the spring 31, avoiding interference between components due to limited movement.

[0078] In one embodiment of the present disclosure, when the output shaft 211 is not subject to external force, the free end 242 is configured to apply a preset force to the spring piece 31; during the movement of the drive assembly 2, the force applied by the free end 242 on the spring piece 31 is configured to change, causing the spring piece 31 to deform. Specifically, when the output shaft 211 is not subject to external force, the free end 242 of the elastic arm 24 will apply a preset force to the spring piece 31 due to the pre-stressed state. This force can be determined by the initial deformation of the elastic arm 24, causing the spring piece 31 to be in a slightly deformed pre-stressed state, thereby providing a stable initial detection reference for the sensor 32. The design of the preset force in this embodiment establishes a stable initial reference for the sensor 32, avoiding the problem of no deformation of the spring piece 31 and drift of the sensor 32 signal in the zero-force state, thereby improving the detection accuracy in the low-force range. In addition, the spring piece 31 in the pre-stressed state is more sensitive to external forces and can quickly respond to small changes in force, further improving the timeliness of detection. When the output shaft 211 is driven by an external force to move the drive assembly 2, the displacement of the drive assembly 2 changes the degree of deformation of the elastic arm 24. When the drive assembly 2 moves toward the side with the elastic arm 24, the elastic arm 24 is further compressed, and the force exerted by the free end 242 on the spring 31 increases accordingly. When the drive assembly 2 moves toward the side without the elastic arm 24, the compression of the elastic arm 24 decreases, and the force exerted by the free end 242 on the spring 31 decreases accordingly. This change in the force exerted by the free end 242 directly causes a corresponding change in the deformation of the spring 31. The sensor 32 detects the difference in deformation to detect brushing force.

[0079] In one embodiment of the present disclosure, the spring piece 31 is constructed so that during the deformation process, the position where it contacts the free end 242 serves as the deformation fulcrum. The remaining area on the spring piece 31 (i.e., the portion relatively far away from the contact point) can be deformed around the deformation fulcrum, and the deformation direction is consistent with the direction of the force applied by the free end 242 of the elastic arm 24, and the deformation trajectory is constrained by the deformation fulcrum, always maintaining a preset curved path. This avoids irregular deformations such as twisting and offset that may occur in the spring piece 31 in a structure without a fixed fulcrum, ensures that the deformation of the spring piece 31 caused by each force change is consistent, and improves the repeatability and accuracy of the detection of the sensor 32. In addition, the position of the deformation fulcrum is determined by the contact point of the free end 242 of the elastic arm 24, so there is no need to design an additional independent deformation fulcrum structure, which simplifies the assembly and positioning of the spring piece 31 and reduces the complexity of the structure.

[0080] In one embodiment of the present disclosure, Figure 6As shown, the elastic sheet 31 includes oppositely arranged first end 311 and second end 312, the first end 311 is configured to be fixedly connected to the motor housing 22 and / or the driving motor 21, and the second end 312 is configured to extend to the space between the motor housing 22 and the elastic arm 24. Specifically, the first end 311 of the elastic sheet 31 can be fixedly connected to the motor housing 22, or can be fixedly connected to the driving motor 21, or can be connected to both at the same time, and the first end 311 is rigidly connected to the driving assembly 2, thereby ensuring that the first end 311 can move synchronously with the driving assembly 2. The second end 312 extends to the space between the motor housing 22 and the elastic arm 24, so that the free end 242 of the elastic arm 24 can apply a predetermined force to the position adjacent to the second end 312 of the elastic sheet 31.

[0081] The output shaft 211 is configured to move the first end 311 relative to the housing 1 under the action of an external force, so that the elastic sheet 31 deforms. Specifically, when the output shaft 211 is subjected to an external force, the driving assembly 2 as a whole moves, thereby driving the first end 311 of the elastic sheet 31 fixed to the driving assembly 2 to move synchronously. Since the second end 312 is clamped between the motor housing 22 and the elastic arm 24, it cannot move freely with the first end 311 due to the spatial constraint of the two, thereby forming a differential state that the first end 311 moves and the second end 312 is limited, so that the elastic sheet 31 deforms.

[0082] The second end 312 extends to the space between the motor housing 22 and the elastic arm 24, thereby utilizing the spatial constraint of the two to limit the movement of the second end 312, so that no additional limiting components are needed, the structure is simplified, and the elastic sheet 31 can effectively deform due to the movement difference between the two ends. In addition, this layout allows the elastic sheet 31 and the driving assembly 2 to be installed compactly, without occupying additional space in the inner cavity 10, and is suitable for the compact internal structure of the oral cleaning appliance handle 100.

[0083] In one specific embodiment of the present disclosure, the elastic sheet 31 is configured to extend along the first axis direction (i.e., the X-axis direction). The extension direction of the elastic sheet 31 is substantially parallel to the output shaft 211, thereby maximizing the use of the axial space of the driving assembly 2, avoiding occupying too much space in the radial direction, and adapting to the elongated inner cavity 10 structure design of the oral cleaning appliance handle 100. At the same time, the parallel layout of the elastic sheet 31 and the output shaft 211 ensures that the deformation direction of the elastic sheet 31 is consistent with the force direction of the output shaft 211, the force transmission does not need to change direction, the force loss is reduced, and the small force can also cause obvious deformation.

[0084] In one embodiment of the present disclosure, the sensor 32 is configured to be fixed to the elastic sheet 31 at a position adjacent to the first end 311. This position is not as large as the deformation of the middle of the elastic sheet 31, but is in the linear sensitive area of the deformation of the elastic sheet 31. The sensor 32 is arranged adjacent to the first end 311, which can avoid the area of excessive deformation of the elastic sheet 31, avoid the saturation of the sensor 32 signal caused by excessive deformation, ensure that the sensor 32 can output stable linear signals in the full-range detection range, and improve the detection accuracy. The sensor 32 can be fixed to the elastic sheet 31 by pasting or other methods, so as to ensure that the micro-deformation of the area can be captured in real time.

[0085] Embodiment Four This embodiment is similar to Embodiment Three, and also provides an elastic arm 24 structure, and the elastic arm 24 structure can also be arranged on the cover plate 221. The main difference between this embodiment and Embodiment One is that the elastic arm 24 is provided with two, and the specific arrangement of the elastic sheet 31 also changes accordingly.

[0086] Reference Figures 9 to 13 The motor housing 22 is provided with two elastic arms 24 at intervals. As described above, the fixed end 241 of the elastic arm 24 is configured to be fixedly connected to the motor housing 22, for example, can be integrally formed with the cover plate 221, and the free end 242 of the elastic arm 24 is pre-pressed on the inner wall of the shell 1. The structures of the two elastic arms 24 can be completely consistent, and can be symmetrically arranged on opposite sides of the motor housing 22. The free ends 242 of the two elastic arms 24 are respectively connected to the opposite ends of the elastic sheet 31, and the free ends 242 can form pre-pressing contact with the opposite ends of the elastic sheet 31, and the free ends 242 are also closely attached to the inner wall of the shell 1.

[0087] Under the driving action of the output shaft 211, the two free ends 242 are configured to respectively apply forces to the opposite ends of the elastic sheet 31 to cause the elastic sheet 31 to deform. Specifically, when the output shaft 211 is driven to move the entire driving assembly 2 under the action of an external force, the free ends 242 of the two elastic arms 24 cannot displace synchronously with the driving assembly 2 due to the constraint of the inner wall of the shell 1, and thus respectively apply forces with consistent directions and similar sizes to the two ends of the elastic sheet 31, and finally force the middle region of the elastic sheet 31 to bend and deform, and the deformation trajectory is a substantially symmetrical arc.

[0088] By providing two elastic arms 24, this embodiment avoids the unilateral deflection that may occur when a single elastic arm 24 applies pressure to one end of the spring clip 31. Under the action of the free ends 242 of the two elastic arms 24, both ends of the spring clip 31 are subjected to balanced forces, causing the spring clip 31 to deform symmetrically around its central axis. This avoids signal deviation from the sensor 32 caused by irregular deformation and significantly improves detection repeatability and accuracy. Furthermore, the symmetrical application of force results in a more uniform force distribution on the spring clip 31, avoiding localized stress concentration (such as excessive force on one end of the spring clip 31 when a single elastic arm 24 applies force). This effectively prevents permanent deformation of the spring clip 31 due to long-term unilateral force, thereby extending the service life of the spring clip 31.

[0089] In one embodiment of the present disclosure, reference Figure 9 and Figure 12 Sensor 32 is constructed to be fixed in the middle of spring clip 31. Specifically, sensor 32 is located at the midpoint of the extended length of spring clip 31 and at the midpoint of the line connecting the free ends 242 of the two elastic arms 24. As the two elastic arms 24 apply force to the ends of spring clip 31, the deformation of spring clip 31 gradually increases from the ends to the middle. The middle position becomes the area of ​​maximum deformation of spring clip 31, and the deformation trajectory in this area is the most stable. Sensor 32 can directly capture the most significant and regular deformation signals, effectively improving detection sensitivity.

[0090] In one embodiment of the present disclosure, reference Figure 12 and Figure 13 A soft rubber gasket 6 is provided between the sensor 32 and the drive motor 21. Specifically, the soft rubber gasket 6 can be provided below the spring 31 at a position corresponding to the sensor 32, and the soft rubber gasket 6 can at least cover the lower surface of the sensor 32. The soft rubber gasket 6 can be made of a soft material with a certain degree of elasticity and insulation, and its shape is substantially consistent with the shape of the lower surface of the sensor 32. For example, if the sensor 32 is rectangular, the soft rubber gasket 6 can also be provided in a rectangular shape. The soft rubber gasket 6 is fixed between the sensor 32 and the drive motor 21 by gluing or slight pressure. The three are tightly fitted but without rigid pressure, ensuring that the soft rubber gasket can freely compress or rebound. The soft rubber pad 6 can isolate the vibration of the driving motor 21. When the driving motor 21 is working, high-frequency micro-vibration will be generated. If the sensor 32 is directly close to the driving motor 21, the vibration will be easily transmitted to the sensor 32, resulting in that the sensor 32 captures an error "deformation signal", and further causes misjudgment. The elastic material of the soft rubber pad 6 can absorb part of the vibration energy, greatly weaken the strength of the vibration transmitted to the sensor 32, so that the sensor 32 can only capture the real signal caused by the deformation of the elastic sheet 31, thereby improving the accuracy of detection. In addition, the elasticity of the soft rubber pad 6 can buffer the rigid collision between the sensor 32 and the driving motor 21, avoid the physical damage of the sensor 32 due to the collision, and further improve the reliability of the sensor 32.

[0091] In one embodiment of the present disclosure, the elastic sheet 31 is configured to extend along a second axis perpendicular to the first axis, with reference to Figure 8 The Y axis perpendicular to the X axis is the second axis, and the second axis is parallel to the radial direction of the oral cleaning appliance handle 100. In this embodiment, the elastic sheet 31 is arranged in a transverse direction and is perpendicular to the longitudinal extension direction of the output shaft 211. The opposite ends of the elastic sheet 31 are in pre-pressing contact with the free ends 242 of the two elastic arms 24, and the middle region of the elastic sheet 31 forms a suspended structure not in contact with other components, thereby reserving space for deformation. The extension length of the elastic sheet 31 matches the spacing of the two elastic arms 24, ensuring that the two ends thereof can completely cover the contact range of the free ends 242 of the elastic arms 24. The elastic sheet 31 extending along the second axis is consistent with the overall movement direction of the driving assembly 2, and the driving assembly 2 can move along the radial direction of the oral cleaning appliance handle 100. The radial force applied by the two elastic arms 24 to the two ends of the elastic sheet 31 can be directly converted into the radial deformation of the elastic sheet 31, thereby reducing the loss of force in direction conversion, ensuring that a small amount of brushing force can also cause obvious deformation, and improving the force transmission efficiency. In addition, the perpendicular arrangement of the elastic sheet 31 and the output shaft 211 completely separates the deformation track of the elastic sheet 31 from the rotation track of the output shaft 211, avoiding interference between the output shaft 211 and the elastic sheet 31 when the output shaft 211 rotates, and protecting the elastic sheet 31 and the output shaft 211.

[0092] In one embodiment of the present disclosure, with reference to Figure 10 and Figure 11The two elastic arms 24 are constructed to be connected to each other through a connecting arm 25, and the connecting arm 25 is constructed to be located between the spring 31 and the housing 1. The connecting arm 25 can play a role of strengthening and integrating the two elastic arms 24. It can form a linked whole with the two elastic arms 24, greatly reducing the relative movement between the two elastic arms 24, thereby avoiding the problem of independent offset and asynchronous force application of the elastic arms 24 when unilateral force is applied, and ensuring that the free ends 242 of the two elastic arms 24 can always and synchronously apply a balanced force to the two ends of the spring 31, thereby making the spring 31 evenly stressed with less fluctuation, and the deformation more symmetrical and more stable. The stable force applied to the spring 31 directly ensures that the deformation signal captured by the sensor 32 is purer, without additional interference, and the detection error is significantly reduced, ensuring that the brushing force detection is more accurate and reliable.

[0093] In one embodiment of the present disclosure, reference Figure 10 and Figure 11 A limiting portion 251 is provided on the connecting arm 25, and a matching portion (not shown in the figure) for matching with the limiting portion 251 is provided on the inner wall of the housing 1. The limiting portion 251 is constructed to at least limit the freedom of movement of the motor housing 22 relative to the housing 1 in the circumferential direction. Specifically, the limiting portion 251 can be a protrusion, a rib extending along the length direction of the connecting arm 25, or a block-shaped structure that partially protrudes outward; correspondingly, the matching portion provided on the inner wall of the housing 1 to match with the limiting portion 251 can be a recessed structure such as a groove or a card slot, and the shape and size of the matching portion are completely matched with the limiting portion 251, ensuring that the limiting portion 251 can be embedded in the matching portion without obvious looseness.

[0094] When the drive assembly 2 moves relative to the housing 1, the limiting portion 251 can only slide in the radial direction of the drive assembly 2 (i.e., the direction of movement of the drive assembly 2) within the mating portion and cannot rotate circumferentially. This indirectly limits the circumferential freedom of movement of the motor housing 22 via the connecting arm 25, preventing the motor housing 22 from rotating about the first axis. The circumferential constraint design of the limiting portion 251 and the mating portion addresses the potential circumferential misalignment of the drive assembly 2 during movement, preventing the two elastic arms 24 from deviating from the preset force-applying positions and thereby protecting the sensor assembly 3.

[0095] Further, the circumferential constraint also enhances the structural stability of the drive assembly 2 as a whole. Compared with the scheme of Embodiment Three, the motor housing 22 in this embodiment no longer relies only on the contact positioning of the elastic arms 24 with the outer shell 1, but forms an additional rigid constraint through the limiting portion 251 and the matching portion, reduces the vibration deviation of the drive assembly 2 in operation, avoids the change of the pre-pressed state of the elastic arms 24 due to vibration, and ensures the stability of the initial reference signal of the sensor 32. In addition, the "embedded" cooperation of the limiting portion 251 and the matching portion does not require additional fasteners, but can achieve constraint only through structural adaptation, simplifying the assembly process and not increasing the space occupation of the inner cavity 10 of the handle 100 of the oral cleaning appliance.

[0096] In one embodiment of the present disclosure, in the radial direction of the drive assembly 2, the connecting arm 25 is configured to cover at least part of the elastic sheet 31. The connecting arm 25 covers at least part of the elastic sheet 31, thereby directly separating the elastic sheet 31 from the inner wall of the outer shell 1, avoiding direct contact between the two, forming targeted protection for the sensing assembly 3, and prolonging the service life of the sensing assembly 3. Further, the connecting arm 25 can leave a certain gap between the elastic sheet 31 when covering the elastic sheet 31, thereby forming a suspended covering structure to ensure that the deformation function of the elastic sheet 31 is not affected; alternatively, the connecting arm 25 can also lightly touch the surface of the elastic sheet 31 through its own elasticity, thereby forming a slight contact covering, and the connecting arm 25 will not exert additional pressure on the elastic sheet 31, thereby ensuring that the elastic sheet 31 can freely bend and deform. The connecting arm 25 in this embodiment adopts a non-rigid contact design, which protects the elastic sheet 31 while not limiting the normal bending and deformation of the elastic sheet 31, ensuring that force transmission and deformation detection are not affected, thereby prolonging the service life of the elastic sheet 31 while ensuring detection reliability.

[0097] In one embodiment of the present disclosure, referring to Figure 10 and Figure 11 , the connecting arm 25 is provided with a matching groove 252 configured to accommodate the sensor 32. The matching groove 252 can provide accommodation and deformation space for the sensor 32, avoiding contact between the sensor 32 and other structures. It can be understood that the sensor 32 needs sufficient space to move when the elastic sheet 31 deforms, and the size of the matching groove 252 is greater than the volume of the sensor 32, thereby enabling the matching groove 252 to completely accommodate the sensor 32 and reserve a certain deformation allowance, preventing the sensor 32 from being damaged due to insufficient space and preventing it from colliding with the elastic arm 24 or the connecting arm 25 during the deformation movement with the elastic sheet 31, and ensuring that the sensor 32 can stably capture the deformation signal of the elastic sheet 31.

[0098] Having described above several embodiments of the disclosure, any modifications and variations that fall within the scope of the described embodiments are also contemplated by the inventor(s). As such, the foregoing description is not intended to limit the scope of the disclosure, and it is recognized that modifications can be made by one of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The word "comprising" is used herein to mean "including" but not necessarily "consisting of" or "composed of." The word "comprising" therefore should not be interpreted as being limited to the recited items information.

Claims

1. A handle for an oral cleaning appliance, characterized in that: include: a housing configured to be grippable, wherein an inner cavity is provided in the housing; a drive assembly disposed in the inner cavity; the drive assembly comprising a drive motor and a motor housing; the drive motor comprising an output shaft extending along a first axis; the drive motor being mounted in the inner cavity through the motor housing; The sensing component includes a spring and a sensor arranged on the spring; at least one end of the spring is constructed to be installed in cooperation with the driving component, the output shaft is constructed to indirectly drive the spring to deform under the action of an external force, and the sensor is configured to sense force based on the deformation of the spring.

2. The oral cleaning appliance handle according to claim 1, characterized in that: The spring sheet includes a first end and a second end that are arranged opposite to each other, and the first end is constructed to be fixedly connected to the motor housing; the drive motor is configured to apply a force to the second end and / or a position on the spring sheet adjacent to the second end under the action of an external force, so as to cause the spring sheet to deform.

3. The handle of the oral cleaning appliance according to claim 2, characterized in that: The elastic sheet is configured to extend along the first axis direction, the first end is configured to be away from the output shaft, and the second end is configured to be close to the output shaft.

4. The handle of the oral cleaning appliance according to claim 2, characterized in that: The elastic sheet is constructed so that during deformation, the position where it is connected to the motor housing serves as a deformation fulcrum.

5. The handle of the oral cleaning appliance according to claim 2, characterized in that: A protrusion is provided on the first direction side wall of the driving motor, and the protrusion is constructed to be pre-pressed to a position on the spring sheet adjacent to the second end; the output shaft is configured to drive the protrusion to move in the first direction under the action of external force to compress the spring sheet to deform.

6. The handle of the oral cleaning appliance according to claim 5, characterized in that: The driving assembly includes a flexible sleeve configured to at least partially wrap the driving motor; the convex block is disposed on the flexible sleeve.

7. The handle of the oral cleaning appliance according to claim 2, characterized in that: The elastic sheet includes a connecting portion provided at the second end, and the connecting portion is configured to extend to connect with the driving motor; the driving motor is configured to drive the elastic sheet to deform through the connecting portion.

8. The handle of the oral cleaning appliance according to claim 7, characterized in that: The connecting portion is configured to be fixedly connected to a side surface of the drive motor on which the output shaft is provided; and a avoidance area is provided on the connecting portion, and the avoidance area is configured to avoid an extension path of the output shaft.

9. The handle of the oral cleaning appliance according to claim 1, characterized in that: An elastic arm is provided on the motor housing, and the elastic arm includes a fixed end and a free end arranged opposite to each other; the fixed end is constructed to be fixedly connected to the motor housing, and the free end is constructed to be pre-pressed between the spring sheet and the outer shell; under the driving action of the output shaft, the free end is configured to be able to apply a force to the spring sheet to cause the spring sheet to deform.

10. The oral cleaning appliance handle according to claim 9, characterized in that: The drive motor is constructed to be fixedly mounted on the motor housing, and the output shaft is constructed to drive the drive assembly as a whole to move relative to the housing under the action of an external force; under the elastic force of the elastic arm, the free end is constructed to be able to always maintain contact with the spring sheet and the inner wall of the housing.

11. The oral cleaning appliance handle according to claim 10, characterized in that: When the output shaft is not subjected to external force, the free end is configured to apply a preset force to the spring sheet; during the movement of the drive assembly, the force applied by the free end to the spring sheet is configured to change, so as to cause the spring sheet to deform.

12. The oral cleaning appliance handle according to claim 10, characterized in that: The elastic piece is constructed so that during deformation, the position where the elastic piece contacts the free end serves as a deformation fulcrum.

13. The oral cleaning appliance handle according to claim 10, characterized in that: The spring sheet includes a first end and a second end that are relatively arranged, the first end being configured to be fixedly connected to the motor housing and / or the drive motor, and the second end being configured to extend between the motor housing and the elastic arm; the output shaft is configured to drive the first end to move relative to the housing under the action of an external force, so that the spring sheet is deformed.

14. The oral cleaning appliance handle according to claim 13, wherein: The sensor is configured to be fixed on the elastic sheet at a position adjacent to the first end.

15. The oral cleaning appliance handle according to claim 13, wherein: The elastic piece is configured to extend along the first axis.

16. The oral cleaning appliance handle according to claim 10, characterized in that There are two elastic arms, and the free ends of the two elastic arms are respectively connected to the opposite ends of the spring sheet; under the driving action of the output shaft, the two free ends are configured to apply force to the opposite ends of the spring sheet respectively to cause the spring sheet to deform.

17. The oral cleaning appliance handle according to claim 16, wherein: The sensor is configured to be fixed at a middle position of the elastic sheet.

18. The oral cleaning appliance handle according to claim 16, wherein: The elastic piece is configured to extend along a second axis perpendicular to the first axis.

19. The oral cleaning appliance handle according to claim 16, wherein: The two elastic arms are configured to be connected to each other via a connecting arm, and the connecting arm is configured to be located between the elastic sheet and the housing.

20. The oral cleaning appliance handle according to claim 19, wherein A limiting portion is provided on the connecting arm, and a matching portion for matching with the limiting portion is provided on the inner wall of the shell; the limiting portion is constructed to at least limit the freedom of movement of the motor housing in the circumferential direction relative to the shell.

21. The oral cleaning appliance handle according to claim 1, wherein The driving motor is a servo motor.

22. The oral cleaning appliance handle according to claim 1, wherein It also includes a control main board; the control main board is constructed to be located in the inner cavity and is constructed to be communicatively connected to the sensor; the control main board is configured to determine the pressure value exerted on the output shaft based on the electrical signal output by the sensor; when the pressure value is greater than a threshold value, the control main board is configured to issue a prompt signal.

23. An oral cleaning device, characterized in that: include: The oral cleaning appliance handle according to any one of claims 1 to 22; A brush head is provided at the end of the handle of the oral cleaning appliance and is configured to be connected to the output shaft.

24. The oral cleaning appliance according to claim 23, characterized in that The brush head is configured to drive the output shaft to move in a direction away from the brush head under the action of an external force, so as to drive the elastic sheet to deform.

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