WO2020007280A1 - Key switch capable of changing pressing reaction speed - Google Patents

Abstract

A key switch capable of changing pressing reaction speed, comprising a base, a cover disposed above the base, a conducting core disposed between the base and the cover, an elastic element disposed below the conducting core and a conducting assembly. An upper opening for the upper end of the conducting core to pass through is formed on the cover; the conducting assembly includes a carbon film substrate and a conducting trigger part disposed on one side edge of the conducting core and positioned at the inner side of the carbon film substrate, wherein a carbon film is provided on the inner side surface of the carbon film substrate, and at least two conducting contact pins for contacting with the carbon film are provided on the conducting trigger part.

Description

Key switch capable of changing pressing response speed Technical field

The invention relates to a key switch, in particular to a key switch capable of changing the pressing response speed.

Background technique

Many operations of existing devices require the use of a key switch as an input means. The quality of the key switch determines the experience of the input device. While ensuring stable performance, the requirements for sensitivity are also increasing. Especially for different applications or different users, the requirements for the response speed of the switch pressing are different.

Especially for game players, the key switch needs to have a faster and more sensitive response speed in order to improve the pleasure of playing games. However, in the existing key switches, due to the structural limitation, the pressing response speed has not been improved, and the response speed and sensitivity of each key switch are constant and cannot be changed, which is inconvenient for users. The user experience cannot be improved.

Summary of the invention

In view of the above-mentioned shortcomings, the object of the present invention is to provide a key switch that can change the pressing response speed. By changing the speed of pressing the guide core, the electrical performance (resistance value) changes at the time of conduction can be generated, and finally the pressing response can be achieved. Change in speed.

The technical solutions adopted by the present invention to achieve the foregoing objectives are:

A key switch capable of changing the pressing response speed includes a base, a cover provided above the base, a guide core provided between the base and the cover, an elastic member provided below the guide core, and a An upper opening is formed on the cover for the upper end of the guide core to pass through, and the conductive component includes a carbon film substrate and a carbon film substrate provided on one side of the guide core. An inner-side trigger component includes a carbon film on the inner surface of the carbon film substrate, and the on-state trigger component has at least two conductive contact pins for contacting the carbon film.

As a further improvement of the present invention, the carbon membrane as a whole is U-shaped or inverted U-shaped, and has two connecting ends.

As a further improvement of the present invention, the carbon film substrate is electrically connected to an upper PCB board, and three conductive terminals penetrating the base and inserted on the upper PCB board are provided at the lower end of the carbon film substrate, and the carbon film sheet One of the two connecting terminals of the is connected to one of the three conductive terminals, and the other of the two connecting terminals of the carbon diaphragm is connected to the other of the three conductive terminals Conductive terminal.

As a further improvement of the present invention, the three conductive terminals are riveted together with the carbon film substrate.

As a further improvement of the present invention, the conduction trigger is mainly composed of a connection piece connected to one side surface of the guide core and at least two of the conduction contact pins provided on the connection piece, wherein the conduction contact The legs are formed by bending the lower end of the connecting sheet in a direction close to the carbon film substrate and extending upward.

As a further improvement of the present invention, the conducting contact leg includes a bent portion connected to the lower end of the connecting piece and bent in a direction close to the carbon film substrate, integrally formed on the upper end of the bent portion and in a direction close to the carbon film substrate. A slanted inclined portion and a bent portion integrally formed on the upper end portion of the slanted portion and bent in a direction close to the connecting piece.

As a further improvement of the present invention, the conduction trigger is a brush.

As a further improvement of the present invention, the guide core and the conduction trigger are welded together.

As a further improvement of the present invention, a lower PCB board electrically connected to an upper PCB board is provided at the lower end of the base; a guide post is protruded upward at a center position of the upper end of the base, and is in the direction of the central axis of the guide post A perforation penetrating to the lower end surface of the base is opened from the top to the bottom; a guide groove is inserted upward from the lower end surface of the guide core for a guide post to be embedded; The perforation passes through and is embedded in the guide groove; the elastic member is a spring, the upper end of the spring is embedded in the guide groove, and the lower end is sleeved around the periphery of the guide post.

As a further improvement of the present invention, a torsion spring is provided on the base, and a springing protrusion for springing the torsion spring is protruded outwardly on one side of the guide core.

The beneficial effects of the present invention are as follows: through a conductive component consisting of an upper PCB board with a special structure design, a carbon film substrate, and a conductive trigger, the conductive contact pins on the conductive trigger are above and below the carbon film. Slide to change the electrical performance in the carbon film substrate, specifically the change in resistance value, so as to generate a signal that the electrical performance (resistance value) changes linearly at the time of on-state, while achieving the on and off functions of the key switch, By changing the speed of pressing the guide core, it is possible to realize the generation of signals that change the electrical performance (resistance value) at the time of conduction, and finally change the speed of the pressing response. Specifically, when the guide core is pressed quickly, the resistance value changes quickly during the conduction, the pressing response speed is fast and the response is sensitive; when the guide core speed is slow, and the resistance value changes slowly during the conduction time, the pressing response speed is relatively slow.

The above is an overview of the technical solution of the invention. The invention is further described below with reference to the drawings and specific embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is an exploded view of the present invention;

2 is a schematic diagram of an external structure of the present invention;

3 is a schematic structural diagram of a part of the present invention;

4 is a schematic structural diagram of a carbon film substrate according to the present invention;

5 is a schematic structural diagram of a conduction trigger of the present invention;

6 is a schematic structural diagram of a conduction component according to the present invention;

7 is a schematic structural diagram of another part of the present invention;

8 is a sectional view of the present invention;

FIG. 9 is another cross-sectional view of the present invention.

detailed description

In order to further explain the technical means and effects adopted by the present invention to achieve a predetermined purpose, specific embodiments of the present invention will be described in detail below with reference to the drawings and preferred embodiments.

Referring to FIGS. 1 to 6, an embodiment of the present invention provides a key switch capable of changing the pressing response speed, which includes a base 1, a cover provided above the base 1, and a cover provided between the base 1 and the cover 2. A guide core 3 in between, an elastic member 4 disposed below the guide core 3, and a conduction component 5 are provided on the cover 2 with an upper opening 21 through which the upper end of the guide core 3 passes, and the guide core 3 Dust-proof design.

As shown in FIG. 6, the conduction component 5 of this embodiment includes a carbon film substrate 52 and a conduction trigger 53 disposed on one side of the guide core 3 and located inside the carbon film substrate 52. A carbon film sheet 521 is provided on the inner surface of the film substrate 52, and at least two conductive contact pins 531 are provided on the conduction trigger 53 for contacting the carbon film sheet 521. In this embodiment, the carbon film substrate is electrically connected to an upper PCB board 51. The upper PCB board 51 is an in-axis PCB board provided with corresponding electronic components, and is used in conjunction with the carbon film substrate 52 and the conduction trigger 53. The conduction trigger 53 The sliding of the on-contact pin 531 on the carbon film sheet 521 changes the electrical properties in the carbon film substrate 52, specifically the change of the resistance value, so that the electrical performance (resistance value) at the time of conduction changes linearly. Signals, while realizing the on and off function of the key switch, can change the speed of pressing the guide core to realize the generation of signals that change the electrical performance (resistance value), and finally realize the change of the pressing response speed.

In this embodiment, the overall shape of the carbon film sheet 521 may be various. When at least two conductive contact pins 531 of the conduction trigger member 53 slide on the carbon film sheet 521, two or more of them can be mainly realized. The distance formed by each of the conducting contact pins 531 on the carbon film sheet 521 may be changed continuously. Preferably, as shown in FIGS. 4 and 6, the carbon film sheet 521 is U-shaped or inverted U-shaped as a whole, and has two connecting ends 5211. At the same time, three conductive terminals 522 penetrating the base 1 and inserted on the upper PCB board 51 are provided at the lower end of the carbon film substrate 52, and one of the two connection ends 5211 of the carbon film sheet 521 is connected. To one of the three conductive terminals 522, and the other of the two connection ends 5211 of the carbon film sheet 521 is connected to the other of the three conductive terminals 522. The two connection ends 5211 of the carbon film sheet 521 are connected to the conductive terminals 522, and the resistance value signal on the carbon film substrate 52 can be transmitted to the upper PCB board 51 to generate the electrical performance (resistance value) in the key switch. A signal that changes linearly.

Taking two conductive contact pins 531 as an example, when the carbon film piece 521 is in an inverted U shape as a whole, as shown in FIG. 4 and FIG. 6, press the guide core 3 downward, and the two conductive contact pins 531 have just contacted the carbon. When the diaphragm 521 is formed, the distance between the two conductive contact pins 531 on the carbon diaphragm 521 is the shortest, that is, the connecting line formed by connecting the two conductive contact feet 531 along the carbon diaphragm 521 is the shortest. At this time, the carbon film substrate The resistance value in 52 is the smallest; when the guide core 3 is pressed to the end, the two conductive contact pins 531 slide to the bottom of the carbon film sheet 521, and the distance formed by the two conductive contact pins 531 on the carbon film sheet 521 becomes the maximum. It is long, that is, the connection line formed by connecting the two conductive contact pins 531 along the carbon film sheet 521 is the longest. At this time, the resistance value in the carbon film substrate 52 is the largest.

When the carbon film sheet 521 is U-shaped as a whole, when the two conductive contact pins 531 have just contacted the carbon film sheet 521, when the guide core 3 is pressed to the bottom, the two conductive contact pins 531 are formed on the carbon film sheet 521. The longest distance becomes the shortest, that is, the resistance value in the carbon film substrate 52 changes from the largest to the smallest.

In this embodiment, as shown in FIG. 5, the conduction trigger 53 is a brush. The conduction trigger 53 is mainly composed of a connection piece 532 connected to a side surface of the guide core, and a connection piece 532. The at least two conducting contact pins 531 are formed on the upper side. The conducting contact pin 531 is formed by bending the lower end of the connecting piece 532 in a direction close to the carbon film substrate 52 and extending upward. Specifically, the conductive contact leg 531 includes a bent portion 5311 connected to the lower end of the connecting piece 532 and bent in a direction close to the carbon film substrate 52, and is integrally formed on the upper end of the bent portion 5311 and close to the carbon film substrate 52. An inclined portion 5112 inclined in a direction and a bent portion 5313 integrally formed on an upper end portion of the inclined portion 5312 and bent in a direction close to the connecting piece 532.

In the process of the guide core 3 moving up and down, the conduction trigger 53 is driven to move up and down, so that at least two conduction contact pins 531 on the conduction trigger 53 are up and down on the carbon film sheet 521 on the inside surface of the carbon film substrate 52 Slide to change the resistance value during conduction, and by changing the speed of pressing the guide core 3, you can change the speed of the resistance value change during conduction, thereby changing the speed of the button switch response to meet the needs of different users. .

Specifically, taking two conductive contact pins 531 as an example, when the carbon membrane sheet 521 has an inverted U-shape as a whole, as shown in FIG. 4 and FIG. 6, the guide core 3 is pressed down a short distance, and the two conductive When the contact pin 531 just touched the carbon film sheet 521, the resistance value in the carbon film substrate 52 was the smallest, that is, the minimum on-resistance value. At this time, the key switch was at the starting point of conduction; then, if the guide core 3 was quickly pressed down to the most At the lower end, the resistance value in the carbon film substrate 52 quickly becomes the maximum value, and the on-time resistance value changes from the minimum value to the maximum value in a short period of time. At this time, the key switch is in the end state of conduction. In the above process, since the guide core 3 is quickly pressed down during operation, the key switch is rapidly changed from the starting point state to the ending point state, and the on-resistance value changes rapidly, thereby directly accelerating the pressing reaction of the key switch. speed. Conversely, if the guide core 3 is pressed down to the lowermost end at a relatively slow speed, the resistance value in the carbon film substrate 52 becomes the maximum time. If the speed is slow, the on-resistance value changes slowly, thereby directly slowing down. The speed of the button switch response.

Correspondingly, when the carbon film sheet 521 is U-shaped as a whole, the guide core 3 is pressed down for a short distance. When the two conductive contact pins 531 just contact the carbon film sheet 521, the resistance value in the carbon film substrate 52 is the largest. That is, the on-resistance value is the largest. At this time, the key switch is in the starting state of conduction. Then, if the guide core 3 is quickly pressed down to the bottom, the resistance value in the carbon film substrate 52 is quickly reduced to the minimum value, and the time is short. The on-resistance value changes quickly from the maximum value to the minimum value. At this time, the key switch is in the end-state of conduction. In the above process, since the guide core 3 is quickly pressed down during operation, the key switch is rapidly changed from the starting point state to the ending point state, and the conduction resistance value changes rapidly, thereby directly accelerating the pressing of the key switch. The speed of the reaction. On the contrary, if the guide core 3 is pressed down to the lower end at a relatively slow speed, the resistance value in the carbon film substrate 52 is reduced to the minimum value. It takes a long time. If the speed is slow, the change of the on-resistance value is slow, thus directly Slowed down the speed of the turn-on response of the key switch.

In this embodiment, the connection methods between the three conductive terminals 522 and the carbon film substrate 52 and between the guide core 3 and the conduction trigger 53 can be adjusted according to specific conditions and needs. Preferably, the three conductive terminals 522 in this embodiment are riveted together with the carbon film substrate 52; at the same time, the guide core 3 and the conduction trigger 53 are welded together.

As a further improvement of the embodiment of the present invention, in order to improve the light-emitting effect of the key switch, this embodiment adopts a structure design of intermediate light-emitting. Specifically, as shown in FIG. 1, FIG. 7 to FIG. 9, a lower PCB board 6 electrically connected to the upper PCB board 51 is provided at the lower end of the base 1, and is protruded upward at a center position of the upper end of the base 1. A guide post 11 is provided in the central axis direction of the guide post 11 and a perforation 111 penetrating to the lower end surface of the base 1 is opened downward; a guide for the guide post 11 to be inserted is provided upward on the lower end surface of the guide core 3. Slot 31; a light-emitting member 7, specifically an LED lamp, is provided on the lower PCB board 6, the upper end of the light-emitting member 7 penetrates through the perforation 111 and is embedded in the guide groove 31; the elastic member 4 is a spring, and the upper end of the spring is embedded into the guide The lower end of the groove 31 is sleeved around the periphery of the guide post 11. The light-emitting member 7 is set at the center position of the base 1 and is conducted through the center of the guide core 3 to realize the effect of intermediate light emission, which greatly improves the light-emitting effect of the key switch to improve the user experience.

As a further improvement of the embodiment of the present invention, in order to improve the pressing feel and generate a pressing sound, a sound generating structure is added in this embodiment. Specifically, as shown in FIG. 1 and FIG. 3, a torsion spring 8 is provided on the base 1, and a spring for springing the torsion spring 8 is protruded outwardly on one side of the guide core 3. Convex 32. During the process of pressing the guide core 3 up and down, the torsion spring 8 is springed by the elastic protrusion 32 of the guide core 3, so that the torsion spring 8 hits the base 1 or the cover 2 to make a sound due to the spring, not only the pressing sound is achieved Effect, and improve the feel of pressing.

The above description is only the preferred embodiments of the present invention, and does not limit the technical scope of the present invention. Therefore, the same or similar technical features as the above embodiments of the present invention are adopted, and other structures obtained are all in the present invention. Within the scope of protection.

Claims (10)

A key switch capable of changing the pressing response speed includes a base, a cover provided above the base, a guide core provided between the base and the cover, an elastic member provided below the guide core, and a An upper opening is formed on the cover for the upper end of the guide core to pass through, and the conductive component includes a carbon film substrate and a carbon film substrate provided on one side of the guide core. An inner-side trigger component includes a carbon film on the inner surface of the carbon film substrate, and the on-state trigger component has at least two conductive contact pins for contacting the carbon film. The key switch according to claim 1, wherein the carbon membrane is U-shaped or inverted U-shaped as a whole, and has two connecting ends. The key switch capable of changing the pressing response speed according to claim 2, wherein the carbon film substrate is electrically connected to an upper PCB board, and a penetrating base is provided at the lower end of the carbon film substrate and is inserted on the base plate. Three conductive terminals on the PCB, one of the two connecting ends of the carbon membrane is connected to one of the three conductive terminals, and the other of the two connecting ends of the carbon membrane is One connection terminal is connected to the other one of the three conductive terminals. The key switch according to claim 3, wherein the three conductive terminals are riveted with a carbon film substrate. The key switch capable of changing the pressing response speed according to claim 1, wherein the conduction trigger is mainly composed of a connection piece connected to one side surface of the guide core and at least two locations provided on the connection piece. The conductive contact pin is formed by bending the lower end of the connecting piece in a direction close to the carbon film substrate and extending upward. The key switch capable of changing the pressing response speed according to claim 5, wherein the conducting contact pin includes a bent portion connected to a lower end of the connecting piece and bent in a direction close to the carbon film substrate, and is integrally formed. An inclined portion at the upper end of the bent portion and inclined toward the carbon film substrate, and a bent portion integrally formed at the upper end of the inclined portion and bent toward the connection piece. The key switch capable of changing the pressing response speed according to claim 1, wherein the conduction trigger is a brush. The key switch according to claim 1, wherein the guide core and the conduction trigger are welded together. The key switch according to any one of claims 3 to 8, wherein a lower PCB board electrically connected to an upper PCB board is provided at a lower end of the base; and an upper end of the base A guide post is convexly protruded upward at the center position, and a perforation penetrating to the lower end surface of the base is opened downward in the direction of the central axis of the guide post; a guide for embedding the guide post is opened upward on the lower end surface of the guide core. A light emitting element is arranged on the lower PCB board, and the upper end of the light emitting element penetrates through the hole and is embedded in the guide groove; the elastic element is a spring, the upper end of the spring is embedded in the guide groove, and the lower end is sleeved around the periphery of the guide post. The key switch capable of changing the pressing response speed according to any one of claims 1 to 8, characterized in that a torsion spring is provided on the base, and a use is provided on one side of the guide core to project outward. A springing protrusion for springing the torsion spring.

Images