Inductance induction shaft switch with induction cone and electronic product

Abstract

The utility model discloses an inductance induction shaft switch with an induction cone and an electronic product. The inductance induction shaft switch comprises an insulation body; the shaft core is movably arranged up and down relative to the insulating body; a reset spring; the sensing cone is arranged at the lower end of the shaft core so as to move up and down along with the shaft core; the sensing cone is provided with a metal cone-shaped part protruding out of the lower end of the shaft core, and the metal cone-shaped part is designed to be gradually enlarged from bottom to top; when the shaft core is pressed, the induction cone moves downwards along with the shaft core so that the metal conical part can stretch out of the lower end of the shaft core movable hole, and the reset spring is in an energy storage state. After the shaft core is released, the reset elastic force of the reset spring drives the shaft core to reset upwards, and the induction cone correspondingly moves upwards and is hidden in the shaft core moving hole again. Function switching is completed in a current induction mode, the switch switching control response is fast, energy is saved compared with a magnetic induction mode, particularly through the design of the induction cone and the design that the metal cone-shaped part is gradually enlarged from bottom to top, the induction sensitivity of the coil is further improved, and the linearity of an induction signal is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to the switch field technology especially is a kind of inductive induction shaft switch with induction cone and electronic product. BACKGROUND

[0002] Traditional switch mainly has mechanical contact switch, magnetic induction switch and so on.

[0003] In actual use, mechanical shaft switch is prone to mechanical or electrical degradation, which affects the performance of the switch, and the terminal welding feet need to be welded and fixed to the PCB, which is troublesome to install and inconvenient to disassemble for maintenance and replacement.

[0004] Compared with the mechanical shaft switch in the conventional technology, the magnetic induction switch does not need to be welded and fixed to the PCB one by one, for example, CN 210246715 U discloses a magnetic shaft switch, which includes a circuit board, a shell arranged above the circuit board, a handle slidingly connected to the shell, an elastic element received in the shell and abutting against the handle, a Hall element electrically connected to the circuit board, a magnet arranged in the shell and corresponding to the Hall element, a metal isolation sheet arranged between the Hall element and the magnet and movable with the handle, and the metal isolation sheet is driven to move by the sliding of the handle to change the signal change between the Hall element and the magnet to realize the instantaneous input or cut-off function of the switch. However, the magnetic induction switch consumes more energy.

[0005] Therefore, it is necessary to study a new technical solution to solve the above problems. INVENTION CONTENTS

[0006] Therefore, the utility model provides a kind of inductive induction shaft switch with induction cone and electronic product, it adopts the mode of current induction to complete function switching, switch switching control response is fast, and it is energy-saving than magnetic induction mode, especially by the design of induction cone, its metal cone gradually increases from bottom to top, further improve the sensitivity of coil induction, make the linearity of induction signal stronger.

[0007] To achieve the above object, the utility model adopts the following technical scheme:

[0008] A kind of inductive induction shaft switch with induction cone, it includes:

[0009] Insulating body, which is provided with an upper and lower extending shaft core movable hole;

[0010] Shaft core, which is installed in the shaft core movable hole and can be movably arranged relative to the insulating body;Reset spring, both ends of which act on the insulating body and the shaft core respectively, to provide the shaft core with an automatic upward reset force;

[0011] a sensing cone arranged at the lower end of the shaft core to move up and down with the shaft core; the sensing cone has a metal cone part protruding from the lower end of the shaft core, which is designed to gradually increase from bottom to top;

[0012] When the shaft core is pressed, the sensing cone moves downward with the shaft core so that the metal cone part protrudes from the lower end of the shaft core moving hole, and the reset spring is in the energy storage state; after the shaft core is released, the reset spring driving force drives the shaft core to reset upward, and the sensing cone moves upward to rehide in the shaft core moving hole.

[0013] As a preferred solution, the sensing cone is tightly fixed on the shaft core;

[0014] Alternatively, the shaft core is plastic fixed on the sensing cone;

[0015] Alternatively, the sensing cone is buckled and fixed on the shaft core;

[0016] Alternatively, the sensing cone is glued and fixed on the shaft core.

[0017] As a preferred solution, the upper segment of the sensing cone has an upward extending connecting rod part, and correspondingly, the bottom end of the shaft core is upwardly recessed with a connecting hole, and the connecting rod part is installed in the connecting hole.

[0018] As a preferred solution, the circumferential surface of the connecting rod part is provided with an inverted hook part, the connecting rod part is upwardly installed in the connecting hole from the bottom end of the shaft core, and the inverted hook part interferes with the inner circumferential wall surface of the connecting hole to form a tight fit.

[0019] As a preferred solution, the metal cone part is conical or conical frustum.

[0020] As a preferred solution, the sensing cone is an integral metal piece.

[0021] As a preferred solution, the sensing cone is any one of copper, copper alloy, aluminum, and aluminum alloy.

[0022] As a preferred solution, the insulating body comprises a base and a cover assembled with each other; the cover is provided with a first through hole, the base is provided with a second through hole, and the outer periphery of the base corresponding to the second through hole is formed with an upward and downward extending guide wall, the guide wall extends into the first through hole, the first through hole and the second through hole are through from top to bottom to form the shaft core moving hole, the lower end of the shaft core and the metal cone part both extend into the guide wall surrounding area, the upper end of the reset spring acts on the shaft core, and the lower end of the reset spring is sleeved on the periphery of the guide wall and abuts against the base.

[0023] An electronic product comprises an electronic product body, a PCB board arranged on the electronic product body, and a switch arranged above the PCB board;

[0024] The switch is an inductive induction shaft switch with an induction cone as described in any one of the preceding aspects; the PCB board is provided with a clearance hole and a coil arranged around the clearance hole, and the coil is connected with an inductive detection driving IC;

[0025] When the shaft core is pressed, the induction cone is displaced downward together with the shaft core to make the metal conical part protrude from the lower end of the shaft core movable hole and extend into the clearance hole, and the section of the part of the metal conical part passing through the coil changes from small to large.

[0026] As a preferred aspect, the electronic product is any one of a mouse, a gamepad, a keyboard, and a remote controller.

[0027] Compared with the prior art, the utility model has obvious advantages and beneficial effects, specifically, from the above technical scheme, it mainly adopts the current induction mode to complete the function switching, the switch switching control response is fast, and it is more energy-saving than the magnetic induction mode (it can save energy by about 80% approximately), especially through the design of the induction cone, the metal conical part is designed to gradually increase from bottom to top, which further improves the sensitivity of the coil induction, and makes the linearity of the induction signal stronger; compared with the traditional mechanical shaft contact switch, it saves the terminal welding process, and avoids the inconvenience of disassembly caused by welding fixation, therefore, it has the advantages of convenient installation and hot plug, and moreover, it is not easy to be mechanically or electrically degraded and waterproof, and the service life is obviously prolonged.

[0028] To make the structure features and effects of the utility model clearer, the utility model will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a perspective view of an inductive induction shaft switch with an induction cone according to an embodiment of the utility model;

[0030] Figure 2 It is an exploded view of an inductive induction shaft switch with an induction cone according to an embodiment of the utility model;

[0031] Figure 3 It is a sectional view of an inductive induction shaft switch with an induction cone and a PCB board according to an embodiment of the utility model;

[0032] Figure 4 It is a bottom view of an inductive induction shaft switch with an induction cone according to an embodiment of the utility model;

[0033] Figure 5is a perspective view of the induction cone of the inductance induction shaft switch with an induction cone according to an embodiment of the present utility model;

[0034] Figure 6 is a partial sectional view of an electronic product according to an embodiment of the present utility model.

[0035] The accompanying drawings are described as follows: the inductance induction shaft switch 100 with an induction cone, the insulating body 10, the shaft core movable hole 101, the mounting positioning column 102, the base 11, the cover 12, the first through hole 121, the second through hole 111, the guide wall 112, the shaft core 20, the connecting hole 21, the reset spring 30, the induction cone 40, the metal cone-shaped part 41, the connecting rod part 42, the barb part 421, the extension part 43, the annular stop surface 431, the gap 1, the PCB 200, the accommodation hole 201, the coil 202. Specific implementation

[0036] Please refer to Figures 1 to 6 , which shows the specific structure of the embodiment of the present utility model.

[0037] In the description of the present utility model, it should be pointed out 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 utility model 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, therefore it cannot be understood as a limitation on the present utility model.

[0038] An inductance induction shaft switch 100 with an induction cone, comprising:

[0039] The insulating body 10 is provided with a shaft core movable hole 101 extending upward and downward;

[0040] The shaft core 20 is installed in the shaft core movable hole 101 of the shaft core 20 and can be movably arranged upward and downward relative to the insulating body 10; the upper end of the shaft core 20 is generally provided with a button part or a button connecting part, for example, a cross-shaped connecting part can be provided at the upper end of the shaft core 20 for connecting a key cap, and when pressed, it is pressed on the key cap.

[0041] The reset spring 30 acts on the insulating body 10 and the shaft core 20 at both ends respectively, so as to provide the shaft core 20 with an automatic upward reset force; the reset spring 30 can be a compression spring, and the material can be stainless steel or other metal materials, which has good durability;

[0042] An induction cone 40 is arranged at the lower end of the shaft core 20 to move up and down with the shaft core 20; the induction cone 40 has a metal cone part 41 protruding from the lower end of the shaft core 20, which is designed to gradually increase from bottom to top, for example, the metal cone part 41 is in the shape of a cone or a truncated cone;

[0043] When the shaft core 20 is pressed, the induction cone 40 moves downward with the shaft core 20 so that the metal cone part 41 protrudes from the lower end of the shaft core 20 moving hole 101, and the return spring 30 is in the energy storage state; after the shaft core 20 is released, the return force of the return spring 30 drives the shaft core 20 to reset upward, and the induction cone 40 moves upward to rehide in the shaft core 20 moving hole 101.

[0044] The induction cone 40 and the shaft core 20 need to be assembled together to form a component structure that can move up and down synchronously. Generally, the shaft core 20 is a plastic part obtained by injection molding, and the induction cone 40 is generally an integral metal part. In actual production, the induction cone 40 can be tightly fitted and fixed on the shaft core 20, or the shaft core 20 can be plastic fixed on the induction cone 40, or the induction cone 40 can be buckled fixed on the shaft core 20, or the induction cone 40 can be glued fixed on the shaft core 20. In this embodiment, the upper segment of the induction cone 40 has an upward extending connecting rod part 42, and the bottom end of the shaft core 20 is correspondingly concave with a connecting hole 21, the connecting rod part 42 is arranged in the connecting hole 21, and the connecting rod part 42 is provided with a barb part 421 on the circumferential side surface, the connecting rod part 42 is arranged in the connecting hole 21 from the bottom end of the shaft core 20 upward, and the barb part 421 interferes with the inner circumferential wall surface of the connecting hole 21 to form a tight fit, which effectively prevents the induction cone 40 from loosening and falling off due to vibration during use, and increases the stability and reliability of the product. Here, the barb part 421 is integrally arranged around the outer circumferential side surface of the connecting rod, which is easy to process.

[0045] The induction cone 40 can be made of any of copper, copper alloy, aluminum, aluminum alloy. Generally, a metal with good electrical conductivity is used to make the induction cone 40. Silver has high electrical conductivity, followed by copper. Compared with silver, copper has the advantages of relatively high electrical conductivity and low cost. Therefore, copper or copper alloy is preferred to make the induction cone 40. Aluminum and aluminum alloy have lower electrical conductivity than copper and copper alloy, but have low cost and light weight. Therefore, they can also be used in some applicable scenarios. The induction cone 40 further integrally connects an extension part 43 between the upper end of the metal conical part 41 and the connecting rod part 42. The outer diameter of the extension part 43 is consistent with the outer diameter of the upper end of the metal conical part 41, that is, the extension part 43 is cylindrical. Since the outer diameter of the extension part 43 is greater than the outer diameter of the connecting rod part 42, and the metal conical part 41, the extension part 43 and the connecting rod part 42 are coaxially arranged, the top of the extension part 43 forms an annular stop surface 431 that exceeds the outer periphery of the connecting rod part 42. The annular stop surface 431 is limited by the lower end surface of the shaft core 20. The outer diameter of the extension part 43 is smaller than the outer diameter of the lower segment of the shaft core 20. In this way, the outer peripheral surface of the lower segment of the shaft core 20 and the guide wall 112 described below form a mutual contact guide effect (or an interference fit relationship), and the outer peripheral surface of the extension part 43 maintains a sufficient gap 1 with the guide wall 112 described below to avoid wear caused by contact between the extension part 43 and the guide wall 112 (because the extension part 43 is made of metal and the guide wall is made of plastic).

[0046] Further, the insulating body 10 comprises a base 11 and a cover 12 assembled with each other; the cover 12 is provided with a first through hole 121, the base 11 is provided with a second through hole 111, and a guide wall 112 extending upward and downward is formed on the periphery of the base 11 corresponding to the second through hole 111, the guide wall 112 extends into the first through hole 121, the first through hole 121 and the second through hole 111 are vertically through to form the shaft hole 101 of the shaft core 20, the lower end of the shaft core 20 and the metal tapered portion 41 both extend into the region surrounded by the guide wall 112, the upper end of the reset spring 30 acts on the shaft core 20, the lower end of the reset spring 30 is sleeved on the periphery of the guide wall 112 and abuts against the base 11, the height of the lower end of the reset spring 30 is higher than the height of the lower end of the metal tapered portion 41, further, the height of the lower end of the reset spring 30 is designed to be at the height of the upper end of the metal tapered portion 41 or higher (in the non-pressed state), by the arrangement of the guide wall 112 (annular wall or non-annular wall), the reset spring 30 is positioned and guided, and the shaft core 20 is also guided. Generally, the bottom of the base 11 is provided with a mounting positioning column 102 or / and a mounting buckle arm for being inserted into the PCB.

[0047] Next, an electronic product is introduced, which can be widely used in industrial input devices and hardware such as switches used in mouse, gamepad, keyboard, remote controller and other computer and mobile phone peripheral products. The electronic product comprises an electronic product body, the electronic product body is provided with a PCB 200 and a switch mounted above the PCB 200, the number of switches is not limited and can be one or more. The switch is the inductive sensing shaft switch 100 with an induction cone described above; the PCB 200 is provided with a clearance hole 201 and a coil 202 arranged around the clearance hole 201, the coil 202 is connected with an inductance detection driving IC; generally, the inductance detection driving IC is arranged on the PCB 200. During installation, the mounting positioning column 102 or / and the mounting buckle arm at the bottom of the insulating body 10 can be inserted into the corresponding hole on the PCB 200 to form an insertion positioning, which is convenient for installation and can realize hot plug, after installation, the bottom end of the insulating body 10 is attached to the top surface of the PCB 200, and the lower end of the second through hole 111 is opposite to the clearance hole 201. The area where the coil 202 is arranged can be within the downward projection area of the insulating body 10 or can extend beyond the downward projection area of the insulating body 10.

[0048] When the shaft core 20 is pressed, the induction cone 40 is displaced downward with the shaft core 20 so that the metal cone part 41 protrudes out of the lower end of the shaft core 20 movable hole 101 and enters the accommodation hole 201, the cross section of the part where the metal cone part 41 passes through the coil 202 changes from small to large, further improving the sensitivity of the induction of the coil 202, making the linearity of the induction signal stronger.

[0049] In this embodiment, the coil 202 is a spiral winding arranged on the top surface of the PCB board 200, the spiral direction is taken as the rotation center of the vertical axis, and the coil 202 is arranged in a gradually increasing spiral from inside to outside. Therefore, the coil 202 is usually arranged horizontally in a flat shape, and the top surface of the coil 202 is flush with or slightly higher than the top surface of the PCB board 200. If it is arranged to be slightly lower than the top surface of the PCB board 200, it is also acceptable. The inductance detection driving IC is a known IC for detecting inductance or inductance change, such as IQS9320, IQS7320 and other chips of Azoteq brand. The inductance detection driving IC is connected to the coil 202. When the shaft core 20 is pressed, the induction cone 40 is displaced downward with the shaft core 20 relative to the insulating body 10 to approach the coil 202, and the inductance detection driving IC senses the inductance change one of the coil 202, and further completes the switching of functions one to two of the switch (also referred to as the switching of 0-1 of the switch). After releasing the shaft core 20, the induction cone 40 is automatically reset upward with the shaft core 20 under the action of the reset member, so that the induction cone 40 is away from the coil 202, and the inductance detection driving IC senses the inductance change two of the coil 202 (also referred to as the switching of 1-0 of the switch), and further completes 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.

[0050] 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 202. Usually, the CTx pin and one end of the coil 202 are further connected in series with a resistor R, thereby forming a self-induction mode measurement circuit. A pair of CRx pins and CTx pins are used to complete the measurement of inductance change, the EM block around the coil 202 is generated by the excitation signal at the CTx pin, and the inductance measurement of the coil 202 is performed on the CRx pin.

[0051] When the induction cone 40 approaches the coil 202, the EM field around the coil 202 induces eddy current in the induction cone 40, the direction of the eddy current is opposite to the EM field, which reduces the total inductance of the coil 202, the inductance detection driving IC measures the inductance change, calculates the distance between the induction cone 40 and the PCB 200 (or the coil 202), so when applied to the actual product, the trigger point (trigger stroke) can be freely adjusted, because it can set the inductance change sensed by the inductance detection driving IC to calculate the corresponding distance, which is the difference between the original position height of the induction cone 40 (referring to the position height of the induction cone 40 relative to the PCB 200 or the coil 202) minus the pressing stroke (also referred to as the trigger stroke). In this way, by setting the inductance or inductance change, the trigger stroke can be adjusted accordingly. For users, on electronic products, the trigger stroke of the key can be customized, especially for different applications with different key strokes. That is, by setting the inductance or inductance change sensed by the inductance detection driving IC to adjust the trigger stroke of the shaft core 20.

[0052] The design focus of the utility model lies in, it mainly is adopt the current response mode to complete function switching, switch switching control response is fast (for example: approximately can reach 250us response time), and compared to magnetic induction mode energy saving (approximately can save energy 80% or so), especially through the design of induction cone 40, its metal cone-shaped part 41 gradually increases from bottom to top, further improve the sensitivity of coil 202, make the linearity of induction signal stronger, compared with traditional mechanical shaft contact switch, it saves the terminal welding process, also avoids the inconvenience of disassembly caused by welding fixation, therefore, has the advantages of convenient installation and hot plug, and, it has no mechanical or electrical degradation and is easy to waterproof, the service life is obviously prolonged.

[0053] The above is only a preferred embodiment of the utility model, and does not limit the technical range of the utility model, so any slight modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model still belongs to the range of the technical scheme of the utility model.

Claims

1. An inductive inductive shaft switch with an induction cone, characterized in that Including: An insulating body having vertically extending shaft core movable holes; A shaft core is installed in the movable hole of the shaft core and can be movably arranged up and down relative to the insulating body; a return spring has its two ends acting on the insulating body and the shaft core respectively to provide the shaft core with an automatic upward return force; A sensing cone is disposed at the lower end of the shaft core to move up and down with the shaft core; the sensing cone has a metal cone-shaped portion protruding from the lower end of the shaft core, the metal cone-shaped portion being designed to gradually increase in size from bottom to top; When the shaft is pressed, the sensing cone moves downward along with the shaft so that the metal cone extends out of the lower end of the shaft's movable hole, and the return spring is in an energy storage state; after the shaft is released, the return force of the return spring drives the shaft to return upward, and the sensing cone moves upward accordingly and re-enters the shaft's movable hole.

2. An inductive inductive shaft switch with an induction cone according to claim 1, characterized in that The induction cone is tightly fitted and fixed to the shaft core; Alternatively, the shaft core can be plastic-coated and fixed to the sensing cone; Alternatively, the sensing cone buckle is fixed to the shaft core; Alternatively, the sensing cone is glued and fixed to the shaft core.

3. An inductive inductive shaft switch with an induction cone according to claim 1, characterized in that The upper section of the induction cone has an upwardly extending connecting rod portion, and correspondingly, the bottom end of the shaft core is recessed upwardly with a connecting hole, into which the connecting rod portion is inserted.

4. An inductive inductive shaft switch with an induction cone according to claim 3, characterized in that The connecting rod is provided with a barb on its peripheral side. The connecting rod is inserted into the connecting hole from the bottom end of the shaft core upwards. The barb and the inner peripheral wall of the connecting hole form an interference-type tight fit.

5. An inductive inductive shaft switch with an induction cone according to claim 1, characterized in that The metal cone-shaped portion is conical or frustum-shaped.

6. An inductive inductive shaft switch with an induction cone according to any one of claims 1 to 5, characterized in that The induction cone is a one-piece metal component.

7. An inductive inductive shaft switch with an induction cone according to claim 6, characterized in that The induction cone is any one of copper, copper alloy, aluminum, or aluminum alloy.

8. An inductive inductive shaft switch with an induction cone according to claim 1, characterized in that The insulating body includes a base and a cover assembled together; the cover is provided with a first through hole, the base is provided with a second through hole, and a guide wall extending vertically is formed on the outer periphery of the base corresponding to the second through hole. The guide wall extends into the first through hole, and the first through hole and the second through hole are vertically connected to form the movable hole of the shaft core. The lower end of the shaft core and the metal conical part both extend into the area enclosed by the guide wall. The upper end of the return spring acts on the shaft core, and the lower end of the return spring is sleeved on the periphery of the guide wall and abuts against the base.

9. An electronic product comprising an electronic product body, wherein a PCB board is disposed on the electronic product body and a switch mounted on the PCB board, characterized in that, The switch is an inductive shaft switch with an inductive cone as described in any one of claims 1 to 8; the PCB board is provided with a clearance hole and a coil arranged around the clearance hole, and the coil is connected to an inductive detection driver IC; When the shaft is pressed, the sensing cone moves downward along with the shaft so that the metal cone extends out of the lower end of the shaft's movable hole and into the clearance hole. The cross-section of the metal cone passing through the coil gradually increases from small to large.

10. The electronic product of claim 9, wherein, The electronic product can be any one of a mouse, game controller, keyboard, or remote control.

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