Inductance sensing microswitch and electronic product

Abstract

Disclosed in the present invention are an inductance sensing microswitch and an electronic product. The inductance sensing microswitch comprises: an insulating body, which is provided with a movable hole and a first elastic-piece fulcrum; a linkage rod, which is mounted in the movable hole and is vertically movable relative to the insulating body; a metal part, which is arranged at the lower end of the linkage rod so as to move vertically along with the linkage rod; a switching elastic piece, with one end arranged at the first elastic-piece fulcrum and the other end acting on the linkage rod; and a button, which is arranged on the insulating body in such a way that the button is vertically movable, so as to drive the switching elastic piece, wherein when the button is pressed, the switching elastic piece is pressed so that the other end deforms downward, thereby driving the downward displacement of the linkage rod together with the metal part; and when the button is released, the other end resets upward, thereby driving the upward displacement of the linkage rod together with the metal part. The present invention breaks away from conventional methods in which microswitches use mechanical contact turn-on switching, cleverly utilizes inductance sensing to complete function switching, and also has numerous advantages such as rapid response, energy efficiency, reliability and a long service life.

Description

Inductive micro switch and electronic product TECHNICAL FIELD

[0001] The present application relates to the field of switch technology, in particular to an inductive micro switch and electronic product. BACKGROUND

[0002] A common micro switch, such as CN 218274362U, generally includes a button, a cover, a switching reed, a plastic base, and a common terminal and a normally open terminal spaced apart on the plastic base. Among them: the common terminal and the normally open terminal are usually made of metal material; the common terminal has a common closing end exposed on the plastic base and a first external pin exposed on the outer surface of the plastic base; the normally open terminal has a normally open closing end exposed on the plastic base and a second external pin exposed on the outer surface of the plastic base; the switching reed is usually made of metal material; one end of the switching reed is provided with a contact point and extends into a switching gap above the normally open closing end, and the other end of the switching reed is electrically connected with the common closing end. The cover is generally installed on the plastic base, and a button hole is provided on the top of the cover for installing the button, the upper end of the button is exposed on the top of the cover, and the lower end of the button acts on the switching reed.

[0003] When installed and applied, the first external pin and the second external pin need to be inserted and welded to the PCB board, which is troublesome to install and inconvenient to disassemble for maintenance and replacement. Pressing the button makes the contact point of the switching reed deform downward and abut against the normally open closing end, so that the normally open terminal and the common terminal form a contact conduction, and releasing the button makes the switching reed reset upward, and the contact point of the switching reed is separated from the normally open closing end to form a disconnection. In this way, the switching switch is controlled. Such a welded fixed structure is difficult to achieve high requirements for waterproofing, and in long-term actual use, it is easy to affect the performance of the switch due to poor waterproof performance, mechanical or electrical degradation, etc.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. TECHNICAL SOLUTION

[0005] Therefore, the present application aims at the defects of the prior art, and the main purpose is to provide an inductive micro switch and electronic product, which breaks the traditional mechanical contact conduction switching mode of micro switch, and cleverly uses inductive mode to complete function switching, and has many advantages such as fast response, energy saving, reliability, long service life, etc.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0007] An inductive micro switch, comprising:

[0008] An insulating body provided with an up-and-down extending movable hole and a first reed support point;

[0009] a linkage rod installed in the movable hole and movable up and down relative to the insulating body;

[0010] a metal piece arranged at the lower end of the linkage rod to move up and down with the linkage rod;

[0011] a switching elastic piece with one end arranged at the first elastic piece fulcrum and the other end acting on the linkage rod;

[0012] a button movably arranged on the insulating body to drive the switching elastic piece; the pressure-receiving part of the switching elastic piece pressed by the button is located between the one end and the other end of the switching elastic piece;

[0013] when the button is pressed, the switching elastic piece is pressed to make the other end deform downward, thereby driving the linkage rod and the metal piece to move downward; after the button is released, the other end is reset upward, thereby driving the linkage rod and the metal piece to move upward.

[0014] As a preferred solution, the insulating body is further provided with a second elastic piece fulcrum, the switching elastic piece is connected with an auxiliary elastic arm, the fixed end of the auxiliary elastic arm is connected to the switching elastic piece close to the other end, the auxiliary elastic arm extends downward toward the second elastic piece fulcrum, and the free end of the auxiliary elastic arm acts on the second elastic piece fulcrum.

[0015] As a preferred solution, the first metal terminal and the second metal terminal are fixed by injection molding or plug-in fixing in the insulating body, and the upper ends of the first metal terminal and the second metal terminal protrude out of the insulating body to serve as the first elastic piece fulcrum and the second elastic piece fulcrum respectively.

[0016] As a preferred solution, the metal piece is a pot-shaped metal sheet.

[0017] As a preferred solution, the movable hole comprises a first through hole and a second through hole in sequence from top to bottom, the second through hole is larger than the first through hole, so that a step surface is formed between the inner side surface of the first through hole and the inner side surface of the second through hole, the linkage rod extends into the first through hole, and the metal piece is located in the second through hole and is limited below the step surface.

[0018] As a preferred solution, the insulating body comprises a base and a cover; the movable hole, the first elastic sheet fulcrum and the second elastic sheet fulcrum are arranged on the base, the cover is provided with a avoiding hole, and the cover is assembled on the base to cover the linkage rod, the switching elastic sheet, the first elastic sheet fulcrum and the second elastic sheet fulcrum; the button passes through the avoiding hole and protrudes above the cover.

[0019] As a preferred solution, the linkage rod is a plastic piece, and the upper end of the linkage rod is provided with a linkage groove; the other end of the switching elastic sheet extends into or passes through the linkage groove; when the button is pressed, the other end of the switching elastic sheet abuts against the inner bottom surface of the linkage groove; and after the button is released, the other end of the switching elastic sheet abuts against the inner top surface of the linkage groove or keeps a gap with the inner bottom surface and the inner top surface of the linkage groove.

[0020] An electronic product comprises an electronic product body, a PCB board arranged on the electronic product body, and a switch mounted above the PCB board.

[0021] The switch is the micro switch of inductive induction described in any one of the preceding solutions; the PCB board is provided with a coil and an inductance detection driving IC; the inductance detection driving IC is connected to the coil, and the coil is located below the metal piece.

[0022] As a preferred solution, the inductance detection driving IC is arranged at the bottom of the PCB board and below the coil.

[0023] As a preferred solution, the inductance detection driving IC has a CRx pin and a CTx pin; the CRx pin and the CTx pin are respectively connected to two ends of the coil to measure the inductance change of the coil; and the inductance change of the coil sensed by the inductance detection driving IC is set to adjust the touch stroke of the pressing part.

[0024] Compared with the prior art, the present application has obvious advantages and beneficial effects. Specifically, as known from the above technical solutions, the present application breaks the traditional micro switch adopting the mechanical contact switching mode, and ingeniously uses the inductive mode to complete the function switching, and has many advantages such as fast response, energy saving, reliability, long service life, convenient installation, hot plug and the like. The present application eliminates the terminal welding process, avoids the inconvenience of disassembly caused by welding fixation, and has no mechanical or electrical degradation and is easy to waterproof. The present application has a simple structure and is easy to produce and manufacture, and is suitable for popularization and application to replace the traditional terminal contact micro switch. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 is an exploded view of the micro switch of inductive induction and the PCB board of the embodiment of the present application;

[0026] Figure 2 is a perspective view of an inductively sensed microswitch of an embodiment of the present application mounted on a PCB;

[0027] Figure 3 is another perspective view of an inductively sensed microswitch of an embodiment of the present application mounted on a PCB;

[0028] Figure 4 is a front view of an inductively sensed microswitch of an embodiment of the present application mounted on a PCB;

[0029] Figure 5 is a cross-sectional view of an inductively sensed microswitch of an embodiment of the present application mounted on a PCB;

[0030] Figure 6 is a perspective view of an inductively sensed microswitch of an embodiment of the present application;

[0031] Figure 7 is another perspective view of an inductively sensed microswitch of an embodiment of the present application;

[0032] Figure 8 is a cross-sectional view of an inductively sensed microswitch of an embodiment of the present application;

[0033] Figure 9 is an exploded view of an inductively sensed microswitch of an embodiment of the present application;

[0034] Figure 10 is another exploded view of an inductively sensed microswitch of an embodiment of the present application;

[0035] Figure 11 is a perspective view of a linkage rod and metal piece of an inductively sensed microswitch of an embodiment of the present application;

[0036] Figure 12 is another perspective view of a linkage rod and metal piece of an inductively sensed microswitch of an embodiment of the present application;

[0037] Figure 13 is a diagram of the EM field around a coil inducing eddy currents in a metal piece over time (as the metal piece approaches the coil);

[0038] Figure 14 is a measurement circuit implemented by a pair of Ctx / CRx pins of an inductance detection driver IC to measure changes in inductance.

[0039] The insulating body 10', the movable hole 110', the button 20', the switching elastic sheet 30', one end 31', the other end 32', the auxiliary elastic arm 33', the fixed end 331', the free end 332', the first elastic sheet fulcrum 311', the second elastic sheet fulcrum 321', the first metal terminal 301', the second metal terminal 302', the metal piece 40, the first through hole 1, the second through hole 2, the stepped surface 3, the base 11', the cover 12', the PCB board 100, the switch 200, the mounting buckle arm 111, the connecting rod 21', the connecting groove 211', the widened part 212', the buckle protruding part 112', the buckle hole 121', the avoiding hole 122', the coil 101, the inductance detection driving IC 102, the mounting hole 103, and the conductive connecting hole 104. Best mode of the present application

[0040] Please refer to FIG. 1 to FIG. 14, which shows the specific structure of the embodiment of the present application.

[0041] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0042] An inductance-sensing micro switch, comprising an insulating body 10', a connecting rod 21', a metal piece 40, a switching elastic sheet 30', and a button 20'.

[0043] The insulating body 10' is provided with a movable hole 110' extending through up and down, and is also provided with a first elastic sheet fulcrum 311'.

[0044] The connecting rod 21' is installed in the movable hole 110' and can move up and down relative to the insulating body 10'; the connecting rod is generally injection molded, the connecting rod is a plastic part, and the upper end of the connecting rod is provided with a connecting groove 211'.

[0045] The metal piece 40 is arranged at the lower end of the connecting rod 21' to move up and down with the connecting rod 21';

[0046] One end 31' of the switching elastic sheet 30' is arranged at the first elastic sheet fulcrum 311', and the other end 32' acts on the connecting rod 21'. Specifically, the other end 32' of the switching elastic sheet 30' extends into or through the connecting groove 211'.

[0047] The button 20' is movably arranged on the insulating body 10' to drive the switching elastic sheet 30'; the button 20' is pressed on the upper surface of the switching elastic sheet 30', and the pressed part of the switching elastic sheet 30' under the button 20' is located between the one end and the other end of the switching elastic sheet 30'.

[0048] When the button 20' is pressed, the other end of the switching elastic sheet 30' is deformed downward, and the connecting rod 21' and the metal piece 40 are displaced downward, and the other end of the switching elastic sheet 30' is located on the inner bottom surface of the linkage groove 211' during the displacement; after the button 20' is released, the other end is reset upward, and the connecting rod 21' and the metal piece 40 are displaced upward, and the other end of the switching elastic sheet 30' is located on the inner top surface of the linkage groove 211' or keeps a gap with the inner bottom surface and the inner top surface of the linkage groove 211' after complete reset.

[0049] Further, the insulating body 10' is further provided with a second switch piece supporting point 321', and the switch piece 30' is connected with an auxiliary elastic arm 33', the fixed end of the auxiliary elastic arm 33' is connected to the switch piece 30' near the other end, the auxiliary elastic arm 33' extends downward towards the second switch piece supporting point 321', the free end of the auxiliary elastic arm 33' acts on the second switch piece supporting point 321', and the pressure receiving position is between the first switch piece supporting point 311' and the second switch piece supporting point 321'. In this way, the switch piece 30' can adopt the structure of the switch piece 30' of a conventional micro switch, which is generally made of stainless steel and can generate a switch operating force and has a good switching feel. When the button 20' is pressed, the switch piece 30' is pressed to deform the other end downward, the fixed end 331' of the auxiliary elastic arm 33' deforms downward together with the switch piece 30' to change the relative position of the fixed end 331' and the free end 332', and the auxiliary elastic arm 33' itself deforms and is in an energy storage state. In this embodiment, the insulating body 10' includes a base 11' and a cover 12' (in other embodiments, the cover 12' is not necessarily required); the movable hole, the first switch piece supporting point 311', and the second switch piece supporting point 321' are all arranged on the base 11', the cover 12' is provided with a avoiding hole 122', the cover 12' is assembled on the base 11' to cover the linkage rod 21', the switch piece 30', the first switch piece supporting point 311', and the second switch piece supporting point 321', the button 20' passes through the avoiding hole and protrudes above the cover 12', and the avoiding hole can be used to position the button 20'. Generally, the cover 12' can be snap-fitted on the base 11', for example, a buckle hole 121' is arranged on the side wall of the cover 12', a buckle protrusion 112' is arranged on the base 11' correspondingly, and the buckle protrusion 112' is buckled into the buckle hole 121'. In addition, the bottom of the insulating body 10' is provided with a mounting positioning column or / and a mounting buckle arm 112 for insertion on a PCB.

[0050] In theory, only the first elastic sheet support point 311' and the second elastic sheet support point 321' are needed to be preset on the insulating body 10', and the preset manner and material can not be limited. In actual production, the traditional micro switch with a pre-embedded metal terminal can still be used, for example, the first metal terminal 301' and the second metal terminal 302' are fixed or inserted into the insulating body 10' by injection molding, and the upper ends of the first metal terminal 301' and the second metal terminal 302' protrude from the insulating body 10' to serve as the corresponding first elastic sheet support point 311' and the second elastic sheet support point 321' respectively. The first metal terminal 301' and the second metal terminal 302' are connected as an integral terminal, or each is independently provided. In the embodiment, the two are formed as an integral terminal by a connecting sheet. The bottom of the metal terminal does not need to protrude from the bottom of the insulating body 10' like the metal terminal of the traditional micro switch, that is, the bottom end of the metal terminal is hidden inside the insulating body 10'. The upper ends of the metal terminals protrude from the insulating body 10' to serve as the corresponding first elastic sheet support point 311' and the second elastic sheet support point 321' respectively, which takes advantage of the strength and rigidity of metal materials, and the stamping formed metal terminal has mature processing technology and low cost

[0051] The movable hole includes a first through hole 1 and a second through hole 2 which are sequentially penetrated from top to bottom, the second through hole 2 is larger than the first through hole 1, so that a step surface 3 is formed between the inner side surface of the first through hole 1 and the inner side surface of the second through hole 2, the linkage rod 21' extends into the first through hole 1, and the metal piece 40 is located in the second through hole 2 and is limited below the step surface 3. Moreover, the lower end of the linkage rod 21' extends outwardly horizontally and has a widened portion 212', which is located in the second through hole 2 and is limited below the step surface 3. Therefore, during the upward resetting action, the upward stroke of the linkage rod 21' can be limited by the stop of the widened portion 212' by the step surface 3, and it is not necessary to rely on the contact and collision between the metal piece 40 and the step surface 3 for limiting, so that the metal piece 40 is better protected.

[0052] The metal piece 40 is connected and fixed to the lower end of the linkage rod 21' in a riveting, injection molding or buckling manner. The metal piece 40 is a pot-shaped metal sheet. The pot shape means that the metal sheet extends upward in an arc or inclined surface shape from the central position of the bottom of the metal sheet to the periphery. This kind of pot-shaped structure can improve the strength of the metal sheet and the linearity and consistency of the inductive signal. The metal sheet is synchronously linked with the linkage rod 21', and can be stamped and formed from copper alloy or other materials to obtain the metal sheet. The metal sheet is connected and fixed to the lower end (specifically, the lower end of the widened portion 212') of the linkage rod 21' in a riveting, injection molding or buckling manner. Preferably, the pot-shaped metal sheet is centrally symmetric with respect to the axis L, and the linkage rod 21', the first through hole and the second through hole are also centered on the axis L. The linkage rod 21' extends into the first through hole and is in clearance fit with the inner wall surface of the first through hole, and the clearance is 0-1 mm.

[0053] Next, an electronic product is introduced. In actual production and manufacturing, the electronic product can be widely used in industrial input devices and hardware such as consumer electronics, such as switches used in mouse, gamepad, keyboard, remote control and other computer and mobile phone peripheral products. The electronic product comprises an electronic product main body, a PCB 100 provided on the electronic product main body and a switch 200 mounted above the PCB 100. The switch 200 is a micro switch with inductive sensing as described above; the PCB 100 is provided with a coil 101 and an inductance detection driving IC 102 (also referred to as an inductance measurement chip), the inductance detection driving IC 102 is connected to the coil 101, and the coil 101 is located below the metal piece 40. Preferably, the inductance detection driving IC is arranged at the bottom of the PCB and below the coil, two conductive connection holes 104 can be provided on the PCB corresponding to the two ends of the coil, the conductive connection holes 104 pass through the upper and lower ends of the PCB, and the coil can be subsequently mounted on the PCB or integrally formed with a coil layer during the PCB process. The CRx pin and the CTx pin of the inductance detection driving IC are respectively connected to the two ends of the coil through the corresponding conductive connection holes. Usually, a resistor R is connected in series between the CTx pin and one end of the coil 101, thereby forming a self-induction mode measurement circuit.

[0054] During installation, the mounting positioning column 111 or / and the mounting buckle arm of the insulating body 10 at the bottom can be used to form a plug-in positioning with the corresponding mounting hole 103 on the PCB 100, which facilitates installation and enables hot plug. After installation, the bottom end of the insulating body 10 is attached to the top surface of the PCB 100, and the coil 101 is located in the area surrounded by the lower end opening of the second through hole 2.

[0055] In this embodiment, the coil 101 is a spiral winding arranged on the top surface of the PCB 100, and the spiral direction is taken as the rotation center of the vertical axis, and the coil is arranged in a gradually increasing spiral from the inside to the outside. Therefore, the coil is usually arranged horizontally in a flat shape, and the top surface of the coil is flush with or slightly higher than the top surface of the PCB 100. If it is arranged slightly lower than the top surface of the PCB 100, it is also acceptable. The inductance detection driving IC 102 is a known IC, which is an inductance measurement chip used for detecting inductance or inductance change, such as IQS9320, IQS7320 and other chips of Azoteq brand. The inductance detection driving IC 102 is connected to the coil 101, and the coil 101 is located below the metal piece 40, preferably the coil is located directly below the metal piece 40. When the button is pressed, the metal piece 40 and the connecting rod 21' are displaced downward relative to the insulating body 10 to approach the coil 101, and the inductance detection driving IC 102 senses the inductance change one of the coil 101, thereby completing the switching of functions one to two of the switch (also referred to as the switching of 0-1 of the switch), and after releasing the button, the metal piece 40 and the connecting rod 21' are automatically reset upward under the action of the reset piece, so that the metal piece 40 is away from the coil 101, and the inductance detection driving IC 102 senses the inductance change two of the coil 101 (also referred to as the switching of 1-0 of the switch), thereby completing the switching of functions two to one of the switch. Functions one and two refer to two different states, and the switch is used to switch between the two states, for example: function one is off, and function two is on.

[0056] The measurement of inductance change is completed by a pair of CRx pin and CTx pin. The EM block around the coil 101 is generated by the excitation signal at the CTx pin, and the inductance measurement of the coil 101 is performed on the CRx pin. When the metal piece 40 approaches the coil 101 downward, the EM field around the coil 101 induces eddy current in the metal piece 40, and the direction of the eddy current is such that it generates an opposite EM field, which causes the total inductance of the coil 101 to decrease. The inductance detection driving IC 102 measures the inductance change and calculates the distance between the metal piece 40 and the PCB board 100 (or the coil). Therefore, when applied to an actual product, the trigger point (trigger stroke) can be freely adjusted, because the inductance change sensed by the inductance detection driving IC can be set to calculate the corresponding distance, which is the difference between the original position height of the metal piece 40 (referring to the position height of the metal piece 40 relative to the PCB board 100 or the coil 101) and the pressing stroke (also referred to as the trigger stroke) after the pressing stroke. In this way, by setting the inductance or inductance change, the trigger stroke of the button can be adjusted accordingly. For manufacturers / users, the trigger stroke of the button on the electronic product can be customized, especially for different applications with different button strokes. That is, the trigger stroke of the button is adjusted by setting the inductance or inductance change sensed by the inductance detection driving IC. The button can be completely customized to set different trigger and release position points, and different button strokes can be configured for different applications to meet individual use requirements. All buttons on the electronic product can be connected and controlled by the same inductance detection driving IC, or a part of the buttons on the electronic product can be connected and controlled by one inductance detection driving IC, and the other part of the buttons can be connected and controlled by another inductance detection driving IC. Further, the buttons can be divided into three or more parts, and the third part of the buttons can be connected and controlled by a third inductance detection driving IC, and so on. The trigger stroke of the buttons in different parts can be freely defined, and even a single switch can be connected and controlled by a separate inductance detection driving IC. Therefore, for the same electronic product, the buttons can have the same trigger stroke or different trigger strokes in different parts, without limitation. The definition of the trigger stroke of the button as described above includes two parameters, trigger position and release position. Different trigger strokes can mean that one or both of the two parameters are different.

[0057] The design of the present application focuses on breaking the traditional micro switch adopts mechanical contact switching mode, clever use of electric induction to complete the function switching, with fast response, energy saving, reliable, long service life, easy to install and hot plug and many other advantages, it saves the terminal welding process, also avoids the disassembly is inconvenient due to welding fixed, and, no mechanical or electrical degradation and easy to waterproof, simple structure, easy to produce, suitable for popularization and application to replace the traditional terminal contact micro switch. And, the micro switch of electric induction is applied to electronic products, which can completely customize the key touch stroke. For manufacturers, mass production of a kind of product / switch, it is easy to control the setting of various touch stroke parameters, and meet the personalized use demand.

[0058] The above is only the preferred embodiment of the present application, not any limitation on the technical scope of the present application, so any slight modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.

Claims

1. An inductively sensed microswitch, characterized by, The utility model relates to a switch, which comprises: an insulating body provided with a movable hole extending upward and downward, and a first spring support point; a connecting rod installed in the movable hole and movable upward and downward relative to the insulating body; a metal piece provided at the lower end of the connecting rod to move upward and downward with the connecting rod for matching with a coil; a switching spring provided at the first spring support point at one end and acting on the connecting rod at the other end; a button movably provided on the insulating body to drive the switching spring, wherein the pressure-receiving part of the switching spring pressed by the button is located between the one end and the other end of the switching spring; when the button is pressed, the other end of the switching spring is deformed downward, thereby driving the connecting rod and the metal piece to move downward; after the button is released, the other end of the switching spring is reset upward, thereby driving the connecting rod and the metal piece to move upward.

2. The inductively sensed microswitch of claim 1, wherein, The insulating body is further provided with a second spring support point, and the switching spring is connected with an auxiliary elastic arm, wherein the fixed end of the auxiliary elastic arm is connected to the switching spring near the other end, the auxiliary elastic arm extends downward toward the second spring support point, and the free end of the auxiliary elastic arm acts on the second spring support point.

3. The inductively sensed microswitch of claim 2, wherein, The first metal terminal and the second metal terminal are fixed by injection molding or insertion in the insulating body, and the upper ends of the first metal terminal and the second metal terminal protrude out of the insulating body to serve as the first spring support point and the second spring support point, respectively.

4. The inductively sensed microswitch of claim 1, wherein, The metal piece is a pot-shaped metal sheet.

5. The inductively sensed microswitch according to claim 1 or 4, characterized in that The movable hole comprises a first through hole and a second through hole in sequence from top to bottom, the second through hole is larger than the first through hole, so that a step surface is formed between the inner side surface of the first through hole and the inner side surface of the second through hole, the connecting rod extends into the first through hole, and the metal piece is located in the second through hole and limited below the step surface.

6. The inductively sensed microswitch of claim 1, wherein, The insulating body comprises a base and a cover, the movable hole, the first spring support point, and the second spring support point are provided on the base, the cover is provided with a relief hole, the cover is assembled on the base to cover the connecting rod, the switching spring, the first spring support point, and the second spring support point, and the button passes through the relief hole and protrudes above the cover.

7. The inductively sensed microswitch of claim 1, wherein, The connecting rod is a plastic piece, the upper end of the connecting rod is provided with a linkage groove, the other end of the switching spring extends into or passes through the linkage groove, when the button is pressed, the other end of the switching spring abuts against the inner bottom surface of the linkage groove, and after the button is released, the other end of the switching spring abuts against the inner top surface of the linkage groove or keeps a gap with the inner bottom surface and the inner top surface of the linkage groove.

8. An electronic product comprising an electronic product body, a PCB board provided on the electronic product body, and a switch installed above the PCB board, characterized in that The switch is an inductance-induced microswitch according to any one of claims 1 to 7; the PCB is provided with a coil and an inductance detection driving IC, the inductance detection driving IC is connected to both ends of the coil, and the coil is located below the metal piece.

9. The electronic product of claim 8, wherein, The inductance detection driving IC is arranged at the bottom of the PCB and below the coil.

10. The electronic product according to claim 8 or 9, characterized in that, The inductance detection driving IC has a CRx pin and a CTx pin, the CRx pin and the CTx pin are respectively connected to both ends of the coil to measure the inductance change of the coil, and the inductance change of the coil sensed by the inductance detection driving IC is set to adjust the touch stroke of the pressing part.

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