Pressure sensing composite key and electric toothbrush

Abstract

The utility model discloses a pressure sensing composite button and an electric toothbrush, and relates to the pressure sensing button technology field, the pressure sensing composite button comprises a main board, the main board is provided with a hollow area and a plurality of first installation positions arranged at intervals, the plurality of first installation positions are arranged around the periphery of the hollow area, and the main board is also provided with a capacitance bonding pad; the pressure sensor is arranged at the position, corresponding to the hollow area, of the main board; and the conductive silica gel is arranged at the position, right opposite to the pressure sensor, of the mainboard in a covering mode, at least part of the conductive silica gel is electrically connected with the capacitor bonding pad, the conductive silica gel is provided with a plurality of fixing parts, and each fixing part is correspondingly fixed to a first installation position of the mainboard. According to the technical scheme provided by the utility model, the problem of how to improve the function interaction between the key and the electric toothbrush on the premise of avoiding the wrong touch of the key of the electric toothbrush can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure-sensitive buttons, in particular to a pressure-sensitive composite button and an electric toothbrush. Background Art

[0002] An electric toothbrush is a type of toothbrush that generates high-frequency vibrations in the brush head through the rapid rotation or vibration of the electric motor. When used, it can instantly break down toothpaste into fine foam, deeply clean the gaps between teeth, and the vibration of the bristles can promote blood circulation in the oral cavity and have a massage effect on the gum tissue. Traditional electric toothbrushes have pressure sensors in the plastic parts to help users control the correct brushing force when brushing their teeth. The operating principle is generally based on built-in sensors or pressure sensors. When the user applies too much pressure, these sensors will detect and send signals to the electric toothbrush, triggering a corresponding response.

[0003] However, traditional pressure-sensing electric toothbrushes have a single function. The pressure-sensing button can only detect the amount of pressure applied by the user and cannot provide more diverse interaction methods. Moreover, since the pressure-sensing button can only be triggered by applying pressure, there may be a risk of accidental touch. Utility Model Content

[0004] The main purpose of the utility model is to provide a pressure-sensitive composite button and an electric toothbrush, aiming to solve the problem of how to improve the functional interaction between the button and the electric toothbrush while avoiding accidental touching of the button of the electric toothbrush.

[0005] To achieve the above-mentioned purpose, the pressure-sensitive composite key proposed by the present invention comprises:

[0006] A mainboard, the mainboard having a hollow area and a plurality of first mounting positions arranged at intervals, the plurality of first mounting positions being arranged around the hollow area, and the mainboard further having a capacitor pad;

[0007] A pressure sensor is arranged at a position of the mainboard corresponding to the hollow area;

[0008] The conductive silicone cover is arranged at a position of the mainboard facing the pressure sensor, and at least a part of the conductive silicone is electrically connected to the capacitor pad. The conductive silicone has a plurality of fixing parts, and each of the fixing parts is fixed to a first mounting position of the mainboard.

[0009] In one embodiment, a groove is provided on a side of the conductive silicone rubber close to the pressure sensor, and the groove is used for fitting and installing the pressure sensor.

[0010] In one embodiment, the groove is provided with a protruding portion at a position corresponding to the pressure sensor;

[0011] When the conductive silicone is pressed, the protrusion contacts the pressure sensor.

[0012] In one embodiment, the first installation position is a first positioning hole, the fixing portion is a positioning column, and the positioning columns are inserted into the first positioning hole one by one.

[0013] In one embodiment, the capacitor pad is disposed between two adjacent first mounting positions, and after the fixing portion is installed at the first mounting position, at least a portion of the conductive silicone is electrically connected to the capacitor pad.

[0014] In one embodiment, the conductive silicone is electrically connected to the capacitor pad via conductive glue;

[0015] Alternatively, the conductive silicone is adhered to the capacitor pad by double-sided tape, and the area of ​​the double-sided tape is smaller than the area of ​​the connection surface between the conductive silicone and the capacitor pad.

[0016] The utility model also provides an electric toothbrush, comprising:

[0017] case;

[0018] A main body, disposed in the shell, and having a plurality of limiting parts;

[0019] As described in any of the above pressure-sensitive composite keys, the pressure-sensitive composite key is arranged on the main body and in the shell, and the multiple limiting parts are used to limit the pressure-sensitive composite key.

[0020] In one embodiment, the plurality of limiting portions are provided with a plurality of bosses, the first bosses are provided on the wide side of the main board, the second bosses are provided on the two long sides of the main board, the first bosses are provided with buckles, and the buckles abut against at least part of the main board.

[0021] In one embodiment, the plurality of position-limiting portions further include a plurality of second mounting positions, and the plurality of second mounting positions are connected to the plurality of first mounting portions and second mounting portions in a one-to-one correspondence;

[0022] The second installation position is a second positioning hole, the first positioning hole overlaps with the second positioning hole, and the positioning column is inserted into the first positioning hole and the second positioning hole.

[0023] In one embodiment, the thickness of the conductive silicone is greater than the distance from the inner wall of the housing to the main board.

[0024] The technical solution of the utility model replaces the traditional pressure sensing key by using a composite key composed of a pressure sensor and a capacitive sensor, which brings the following beneficial effects:

[0025] 1. The combination of conductive silicone and capacitive sensors can usually only detect the pressure of conductive objects (such as fingers). When the user touches the button with his finger, the conductive silicone will transmit the current to the capacitive sensor. Therefore, the capacitive sensor will only be triggered when the user touches the button with his finger or other conductive objects. This design can effectively prevent other objects (such as water drops, etc.) from touching the button and accidentally starting the electric toothbrush, thereby improving the safety and reliability of the electric toothbrush.

[0026] 2. Provide a more reliable button detection mechanism. The capacitive sensor can sense small pressure changes, while the pressure sensor can detect greater pressure. Through this combination, the electric toothbrush using this button can achieve more diverse interaction methods. For example, the vibration frequency of the brush head or the working mode of the toothbrush can be adjusted according to the different pressure levels applied by the user, thereby providing a more personalized and comfortable user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the structure of an embodiment of a pressure-sensitive composite key provided by the utility model;

[0029] Figure 2 for Figure 1 Schematic diagram of another perspective;

[0030] Figure 3 It is a structural schematic diagram of an embodiment of an electric toothbrush in the utility model;

[0031] Figure 4 It is a structural schematic diagram of the main body of the electric toothbrush in the utility model;

[0032] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0033] Figure 6 for Figure 5 Schematic diagram from another perspective.

[0034] Description of Figure Numbers:

[0035] 1. Pressure-sensitive composite button; 11. Main board; 111. Hollow area; 112. First installation position; 12. Pressure sensor; 13. Conductive silicone; 131. Fixing part; 132. Groove; 1321. Raised part; 2. Electric toothbrush; 21. Shell; 211. Function button; 22. Main body; 221. Limiting part; 2211. Boss; 2211a. First boss; 2211b. Second boss; 2212. Second installation position.

[0036] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0040] Traditional pressure-sensing electric toothbrushes have a single function. The pressure-sensing buttons can only detect the amount of pressure applied by the user and cannot provide more diverse interaction methods. Moreover, since the pressure-sensing buttons can only be triggered by applying pressure, there may be a risk of accidental touches.

[0041] In order to solve the above problems, the utility model proposes a pressure-sensitive composite button 1, which includes: a main board 11, the main board 11 has a hollow area 111 and a plurality of first mounting positions 112 arranged at intervals, the plurality of first mounting positions 112 are arranged around the circumference of the hollow area 111, and the main board 11 is also provided with a capacitor pad; a pressure sensor 12, arranged at a position of the main board 11 corresponding to the hollow area 111; a conductive silicone 13, a cover is arranged at a position of the main board 11 facing the pressure sensor 12, and at least a portion of the conductive silicone 13 is electrically connected to the capacitor pad, and the conductive silicone 13 has a plurality of fixing portions 131, each of the fixing portions 131 is correspondingly fixed to a first mounting position 112 of the main board 11.

[0042] Combined with reference Figure 1 and Figure 2 The main board 11 has a hollow area 111, which can be circular or square. The shape and size of the hollow area 111 need to satisfy that after the pressure sensor 12 is placed in the hollow area 111, the two ends of the pressure sensor 12 are placed on the edge of the hollow area 111, and then the middle part is suspended, that is, the pressure sensor 12 and the hollow area 111 form a simply supported beam structure. The simply supported beam structure allows the two ends of the pressure sensor 12 to be supported on the edge, while the middle part is suspended. This structure can make the sensor more easily sense the pressure changes applied by the outside, thereby improving the sensitivity of the sensor and accurately detecting the pressure changes applied by the user to the pressure sensor 12.

[0043] The pressure sensor 12 may be connected to the mainboard 11 by welding, or by other connection methods with high stability, so that the pressure sensor 12 will not be displaced or deflected during long-term use.

[0044] In this embodiment, four first mounting positions 112 are provided around the hollow area 111, and the conductive silicone 13 has fixing parts 131 corresponding to the four first mounting positions 112 one by one, so that after the conductive silicone 13 is covered on the main board 11, each first mounting position 112 is connected to each fixing part 131, ensuring that the conductive silicone 13 is fixed on the main board 11 at the correct position and has a relatively stable structure, and the conductive silicone 13 is not easy to shift during use.

[0045] A pressure sensor 12 is sandwiched between the mainboards 11 , and the pressure intensity can be transmitted to the pressure sensor by pressing the conductive silicone 13 in cooperation with the hollow area, thereby extracting the pressure intensity of the user.

[0046] Capacitive sensors are widely used in detection technology to measure mechanical quantities such as displacement, vibration, angle, acceleration, and thermal measurements such as liquid level, pressure, and component content. In this embodiment, the capacitive sensor is used to detect finger presses, so that the pressure-sensitive composite key 1 and the terminal device using it can cooperate and perform related functional design.

[0047] It should be noted that the mainboard 11 in this embodiment also has a capacitor pad. After the fixing portion 131 of the conductive silicone 13 is connected one-to-one to the first mounting position 112, at least part of the main body 22 of the conductive silicone 13 is electrically connected to the capacitor pad on the mainboard 11, and is used as a capacitive sensor. The conductive silicone 13 is electrically connected to the capacitor pad on the mainboard 11, and the operation performed on the conductive silicone 13 will change the capacitance value. Therefore, when the user presses the conductive silicone 13, it will cause a change in the capacitance value, thereby realizing contact sensing and detecting the user's operation. Through the detected user operation, the corresponding functional interaction can be designed.

[0048] In addition, the button of this embodiment can usually only detect the pressing of a conductive object (such as a finger). Only when the user touches the button with a designated conductive object will the capacitance change occur. Therefore, only when the user touches the button with a finger or other conductive object will the capacitive sensor be triggered. This design can effectively prevent other objects from touching the button and causing false touches.

[0049] Therefore, in this embodiment, the mainboard 11, the conductive silicone 13 and the finger together form a capacitive sensor. In the initial state, the conductive silicone 13 is electrically connected to the capacitor pad on the mainboard 11 to form a fixed capacitor. At this time, the capacitance value of the capacitor is relatively stable. When the user's finger touches the conductive silicone 13, the situation changes. Since the human body is a conductor, the touch of the finger will change the electric field distribution between the conductive silicone 13 and the mainboard 11, thereby causing a change in the capacitance value. In this way, the function is designed by detecting the change in the capacitance value.

[0050] The pressure sensor 12 and the capacitive sensor are combined to have two modes of cooperation. First, the pressure sensor 12 is mainly used to detect the pressure applied by the user, and the capacitive sensor is used to detect the user's contact behavior. By comprehensively utilizing the data of the two sensors, the user's actual operation can be more accurately judged, thereby improving the accuracy of the system. Second, the capacitive sensor can sense tiny pressure changes, while the pressure sensor 12 can detect greater pressure. Through this combination, a wider range of pressure values ​​can be monitored, thereby having higher sensitivity, and more interactive functions with terminal products can be distinguished based on this pressure value.

[0051] In summary, the present invention can solve the problem of single function and easy accidental touch of some exemplary pressure-sensitive buttons. The button only allows conductor control (such as fingers), reducing the possibility of accidental touch. Combining the pressure sensor 12 with the capacitive sensor can improve the user experience and increase the interactive function between the button and the terminal.

[0052] In this embodiment, a groove is provided on a side of the conductive silicone 13 close to the pressure sensor 12 , and the groove is used for fitting the pressure sensor 12 .

[0053] The presence of the groove can ensure that the pressure sensor 12 is accurately installed on the conductive silicone 13. The shape and size of the groove match the pressure sensor 12, so the pressure sensor 12 will be accurately positioned on the conductive silicone 13 during installation, thereby ensuring the accuracy and reliability of the sensor.

[0054] In addition, the presence of the groove provides a certain installation space for the pressure sensor 12, strengthens the contact stability between the conductive silicone 13 and the capacitor pad, and avoids the gap between the conductive silicone 13 and the capacitor pad due to the height of the pressure sensor 12, which affects the connection and further affects the effect of the capacitive sensor. Therefore, the groove increases the stability of the structure.

[0055] In this embodiment, a protrusion 1321 is protruded from the groove at a position corresponding to the pressure sensor 12 ; when the conductive silicone 13 is pressed, the protrusion 1321 abuts against the pressure sensor 12 .

[0056] The protrusion 1321 is disposed at a position corresponding to the hollow area 111 of the main board 11 , and cooperates with the hollow area 111 to press the pressure sensor 12 .

[0057] It should be noted that if a pressure sensor 12 is provided in the groove, and then the entire conductive silicone 13 is pressed to transmit pressure to the pressure sensor 12, the force will be dispersed and the transmission effect will be poor. Therefore, in this embodiment, a protrusion 1321 is provided in the concave portion 132 to ensure that when the conductive silicone 13 is pressed, pressure is accurately applied to the position of the pressure sensor 12 corresponding to the hollow area 111, so that the sensor can accurately sense the pressure change applied by the user, thereby improving the accuracy of the sensor.

[0058] In this embodiment, the first installation position 112 is a first positioning hole, and the fixing portion 131 is a positioning column. The positioning columns are inserted into the first positioning hole one by one.

[0059] The insertion of the positioning post can provide a stable fixing effect. When the positioning post is inserted into the positioning hole, the conductive silicone 13 will be firmly fixed on the main board 11, and it is not easy to loosen or shift, which can ensure that the sensor will not produce erroneous measurements or operations due to displacement during use. It should be explained that the connection method of the positioning hole and the positioning post makes the connection method of this structure simple and reliable.

[0060] In this embodiment, the capacitor pad is disposed between two adjacent first positioning holes, the positioning column is inserted behind the first positioning hole, and at least a portion of the conductive silicone 13 is electrically connected to the capacitor pad.

[0061] Since the conductive silicone 13 has a groove in the middle, when the positioning column of the conductive silicone 13 is inserted into the positioning hole of the main board 11, the connection between the conductive silicone 13 and the main board 11 is the part between every two adjacent positioning columns of the conductive silicone 13 and the part between every two adjacent positioning holes. Therefore, a capacitor pad is provided here to facilitate electrical connection with the conductive silicone 13.

[0062] In this embodiment, the conductive silicone 13 is electrically connected to the capacitor pad via conductive glue; or, the conductive silicone 13 is adhered to the capacitor pad via double-sided tape, and the area of ​​the double-sided tape is smaller than the area of ​​the connection surface between the conductive silicone 13 and the capacitor pad.

[0063] Conductive adhesive or double-sided adhesive can enhance the mechanical stability between the conductive silicone rubber 13 and the capacitor pad. They can effectively fix the conductive silicone rubber 13 in the correct position to prevent it from moving or loosening due to vibration or external force during use, thereby improving the reliability and stability of the entire system.

[0064] It should be noted that the conductive adhesive will not affect the electrical connection between the two, and the size can be designed arbitrarily according to the structure. However, the double-sided adhesive is an insulator, so the area of ​​the double-sided adhesive needs to be smaller than the area of ​​the connection surface between the conductive silicone 13 and the capacitor pad, so that when the conductive silicone 13 and the capacitor pad are connected through the double-sided adhesive, it does not affect the electrical conductivity between the two.

[0065] The double-sided adhesive used in this embodiment is 3M9488A, which has excellent adhesion, high temperature resistance and chemical corrosion resistance, making this button suitable for a large number of terminal products.

[0066] Combined with reference Figure 3-Figure 5The utility model also provides an electric toothbrush 2, which includes: a housing 21; a main body 22, which is arranged in the housing 21, and the main body 22 has a plurality of limiting parts 221; a pressure-sensitive composite button 1, which is arranged on the main body 22 and in the housing 21, and the plurality of limiting parts 221 are used to limit the pressure-sensitive composite button 1. The specific structure of the pressure-sensitive composite button 1 refers to the above embodiment. Since the electric toothbrush 2 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0067] It is understandable that the electric toothbrush 2 can achieve more diverse interaction modes by using this button. For example, the vibration frequency of the brush head or the working mode of the toothbrush can be adjusted according to the different pressure levels applied by the user, thereby providing a more personalized and comfortable use experience.

[0068] Combined with reference Figure 3-Figure 5 After the pressure-sensitive composite button 1 is arranged between the two, its conductive silicone 13 abuts against the shell 21, and its main board 11 is fixed to the main body 22. Since the conductive silicone 13 and the main board 11 are connected in a positioning column-to-positioning hole manner, this connection method has strong stability in the lateral direction, but poor stability in the longitudinal direction. Therefore, the shell 21 can also be used to limit the conductive silicone 13.

[0069] Combined with reference Figure 3-Figure 5 In this embodiment, the main body 22 of the electric toothbrush 2 has a plurality of limiting portions 221, and the plurality of limiting portions 221 are respectively arranged around the main board 11, so that the entire conductive silicone 13 is limited on the main body 22. This design makes the overall structure simple and has strong stability.

[0070] The housing 21 has a function button 211 , which is used to cooperate with the pressure sensing composite button 1 arranged in the housing 21 . The function button 211 can be made of conductive material, and when pressed by a user, the button can function as a capacitive sensor.

[0071] In this embodiment, the multiple limiting portions 221 are provided with multiple bosses 2211, and the multiple bosses 2211 include a first boss 2211a and multiple second bosses 2211b, the first boss 2211a is provided on the wide side of the main board 11, and the second bosses 2211b are provided on the two long sides of the main board 11, and the first boss 2211a is provided with a buckle, and the buckle abuts at least part of the main board 11.

[0072] The first boss 2211a and multiple second bosses 2211b are enclosed on the main body 22 to form a storage space. The main board 11 is arranged in this space and is confined in this space. The first boss 2211a has a buckle, which fixes the main board 11 on the main body 22. This structure can prevent the main board 11 from being displaced under long-term pressing and use.

[0073] The main board 11 may also be reinforced and connected to the main body 22 by screws.

[0074] In this embodiment, the multiple limiting portions 221 are also provided with multiple second mounting positions 2212, and the multiple second mounting positions 2212 are connected to the multiple first mounting portions and the second mounting portions in a one-to-one correspondence; the second mounting positions 2212 are second positioning holes, the first positioning holes overlap with the second positioning holes, and the positioning columns are inserted into the first positioning holes and the second positioning holes.

[0075] The multiple second mounting positions 2212 provide additional fixing points, which can more firmly fix the pressure-sensitive composite key 1. Through the connection of multiple fixing points, the contact area between the key and the main body 22 can be increased, thereby improving the stability and reliability of the fixation.

[0076] Moreover, the overlapping design of the first positioning hole and the second positioning hole and the insertion of the positioning column make the assembly of the key simpler and more convenient. The positioning column can be fixed by simply inserting it between the first positioning hole and the second positioning hole, without the need for additional complicated operations or tools, thus saving assembly time and cost.

[0077] In this embodiment, the thickness of the conductive silicone 13 is greater than the distance between the inner wall of the housing 21 and the main board 11, so that the silicone rubber is in a compressed state after assembly, the compression amount is between 0.2-0.4 mm, and the hardness of the silicone rubber is about 60 A. In this way, even if the electric toothbrush 2 is subjected to vibration or external pressure, the conductive silicone 13 can more effectively fill the gap to prevent loosening and movement caused by vibration.

[0078] In summary, the utility model proposes a pressure-sensitive composite button 1, which realizes more diverse interaction methods by combining the pressure sensor 12 and the capacitive sensor, as well as the design of the conductive silicone 13. The design of the groove and the protrusion 1321 of the conductive silicone 13 ensures the accurate installation and stability of the pressure sensor 12, while avoiding the risk of accidental touch. By connecting the conductive silicone 13 to the capacitor pad, a more sensitive perception of the user's operation is achieved, thereby providing more interactive functions. In addition, the electric toothbrush 2 adopts this button design, which can adjust the working mode according to the pressure level applied by the user, providing a more personalized and comfortable use experience. At the same time, the button structure is simple in design and has strong stability, which can prevent displacement and loosening under long-term use.

[0079] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pressure-sensitive composite key, characterized in that: include: A mainboard, the mainboard having a hollow area and a plurality of first mounting positions arranged at intervals, the plurality of first mounting positions being arranged around the hollow area, and the mainboard further having a capacitor pad; A pressure sensor is arranged at a position of the mainboard corresponding to the hollow area; The conductive silicone cover is arranged at a position of the mainboard facing the pressure sensor, and at least a part of the conductive silicone is electrically connected to the capacitor pad. The conductive silicone has a plurality of fixing parts, and each of the fixing parts is fixed to a first mounting position of the mainboard.

2. The pressure-sensitive composite key according to claim 1, wherein: A groove is provided on one side of the conductive silicone rubber close to the pressure sensor, and the groove is used for fitting and installing the pressure sensor.

3. The pressure-sensitive composite key according to claim 2, wherein: The groove is provided with a protruding portion at a position corresponding to the pressure sensor; When the conductive silicone is pressed, the protrusion contacts the pressure sensor.

4. The pressure-sensitive composite key according to claim 1, wherein: The first installation position is a first positioning hole, the fixing portion is a positioning column, and the positioning columns are inserted into the first positioning hole one by one.

5. The pressure-sensitive composite key according to claim 1, wherein: The capacitor pad is disposed between two adjacent first mounting positions. After the fixing portion is mounted at the first mounting position, at least a portion of the conductive silicone is electrically connected to the capacitor pad.

6. The pressure-sensitive composite key according to claim 1, wherein: The conductive silica gel is electrically connected to the capacitor pad via the conductive glue; Alternatively, the conductive silicone is adhered to the capacitor pad by double-sided tape, and the area of ​​the double-sided tape is smaller than the area of ​​the connection surface between the conductive silicone and the capacitor pad.

7. An electric toothbrush, characterized in that: include: case; A main body, disposed in the shell, and having a plurality of limiting parts; The pressure-sensitive composite key according to any one of claims 1 to 6, wherein the pressure-sensitive composite key is arranged on the main body and inside the shell, and the plurality of limiting portions are used to limit the pressure-sensitive composite key.

8. The electric toothbrush according to claim 7, characterized in that The plurality of limiting portions include a first boss and a plurality of second bosses, the first boss is arranged on the wide side of the main board, the second bosses are arranged on the two long sides of the main board, the first boss is provided with a buckle, and the buckle abuts against at least part of the main board.

9. The electric toothbrush according to claim 7, characterized in that: The plurality of position-limiting portions include a plurality of second mounting positions, and the plurality of second mounting positions are connected to the plurality of first mounting positions in a one-to-one correspondence; The first installation position is a first positioning hole, the second installation position is a second positioning hole, the first positioning hole overlaps with the second positioning hole, and the first positioning hole and the second positioning hole are connected through the fixing portion.

10. The electric toothbrush according to any one of claims 7 to 9, characterized in that: The thickness of the conductive silicone is greater than the distance between the inner wall of the shell and the main board.

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