CN213781896U - Static capacitance triggering type light guide key switch - Google Patents

Abstract

The utility model discloses a static capacitance triggers formula light guide key switch. The key switch comprises a rubber shell, a base and a key shaft core; the rubber shell is buckled on the base, and the key shaft core is telescopically arranged on the rubber shell; a return spring is arranged between the key shaft core and the base; the LED lamp also comprises a static capacitor and an LED lamp which are arranged on the PCB; the capacitance of the static capacitor can be changed and triggered by pressing the key shaft core, and the LED lamp is conducted; and a light guide column with a prismatic column structure end face is also arranged on the corresponding LED lamp. The key switch has the advantages of high response speed, high switch sensitivity and good use experience; and the electrostatic capacity type trigger is not easy to damage, can realize longer-time use, and has long service life and low use cost. Moreover, the LED lamp emits light and the light guide column with the prismatic column array structure conducts light to prompt, and the use experience is improved.

Description

Static capacitance triggering type light guide key switch

Technical Field

The utility model relates to a key switch technical field, concretely relates to static capacitance triggers formula light guide key switch.

Background

With the development of electronic information technology, the keyboard is used in larger scale and wider range. In the keyboard, a plurality of independent key switches are arranged, and each key switch can be respectively and independently controlled to trigger a corresponding instruction.

The existing keyboard key switch uses more metal material contact type mechanical key switches, and when the key shaft core is pressed, the corresponding metal static contact and the metal movable contact can be contacted with each other, so that the switch is conducted, and when the key shaft core is reset, the metal static contact and the metal movable contact are separated from each other, so that the switch is disconnected. By adopting the metal material contact type switch, when two metal contacts are in mutual touch contact, the problem of contact jitter can also occur, the response speed is low, and the use experience is poor; meanwhile, the contact made of metal materials is easy to damage, easy to wear after being used for a long time, insensitive to switch, required to be frequently replaced and high in use cost.

SUMMERY OF THE UTILITY MODEL

There is the use for solving current metal contact key switch and experiences poor, life is short and use cost is high problem, the utility model provides a static capacitance triggers formula light guide key switch.

The purpose of the utility model is realized through the following technical scheme.

A static capacitance trigger type photoconductive key switch comprises a rubber shell, a base and a key shaft core; the rubber shell is buckled on the base, and the key shaft core is telescopically arranged on the rubber shell; a return spring is arranged between the key shaft core and the base;

the LED lamp also comprises a static capacitor and an LED lamp which are arranged on the PCB; and when the key shaft core is pressed, the capacity of the static capacitor can be changed and triggered, and the LED lamp is switched on.

In a preferred embodiment, the static capacitor is arranged outside the axis of the key shaft core; the key shaft core is provided with a touch handle which extends outwards and bends downwards, and the touch handle corresponds to the static capacitor; and the base is provided with a conduction cavity for accommodating the touch handle to stretch and penetrate up and down.

In a preferred embodiment, a film is arranged between the base and the PCB; and the part of the film corresponding to the static capacitor is provided with a pressing bulge, and the part of the film corresponding to the LED lamp is provided with a light-transmitting through hole.

In a preferred embodiment, a positioning column is arranged on one side of the base, which faces the rubber shell; a guide groove is formed in the middle of the positioning column; one side of the key shaft core facing the base is provided with a guide post correspondingly matched with the guide groove; when the key shaft core is pressed, the guide post can be positioned and extend into the guide groove.

In a more preferred embodiment, the return spring is sleeved on the positioning column and the guide column.

In a more preferred embodiment, the guide groove is a through groove which penetrates in the axial direction, and a through hole which penetrates in the axial direction is formed in the middle of the guide column; the LED lamp corresponds to the guide groove and the guide post.

In a preferred embodiment, the LED lamp is a single color LED lamp, a two color LED lamp, or an RGB three primary color LED lamp.

In a preferred embodiment, the static capacitance triggered light guide key switch further comprises a light guide column; the light guide columns are correspondingly arranged on the LED lamps; and one end of the light guide column, which is deviated from the LED lamp, can be seen from the rubber shell and the base.

In a more preferred embodiment, an end face of the light guide column facing away from the LED lamp has a prismatic column array structure thereon.

Compared with the prior art, the utility model has the advantages of as follows and beneficial effect:

the utility model discloses a static capacitance trigger formula light guide key switch adopts static capacitance trigger formula conduction structural design, when pressing the key shaft core, triggers the switch through the capacity that changes the static capacitance that sets up on the PCB board and switches on to the capacity of static capacitance recovers and makes the switch disconnection when the key shaft core resets, and response speed is fast, and switching sensitivity is high, and the use experience feels good; and the electrostatic capacity type trigger is not easy to damage, can realize longer-time use, and has long service life and low use cost.

And the PCB is also provided with an LED lamp which is conducted along with the triggering of the switch, and when the key shaft core is pressed to change the capacity of the static capacitor and trigger the switch to be conducted, the LED lamp can emit light to conduct and prompt.

In addition, still be provided with the leaded light post corresponding to the LED lamp, can conduct the light of LED lamp transmission, improve the suggestion effect. And the end face of the light guide column, which is far away from the LED lamp, is provided with a prismatic column array structure, and the prismatic column array structure plays a role in light scattering, so that the conducted light can be uniformly scattered without dazzling, and the use experience is further improved.

Drawings

Fig. 1 is a schematic diagram illustrating an overall structure of a static capacitance triggered photoconductive push switch according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a static capacitance triggered photoconductive push-button switch according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating an assembly structure of a static capacitance triggered photoconductive push switch according to an embodiment of the present invention;

FIG. 4 is a schematic view of a light guide bar;

the attached drawings are marked as follows: 1-rubber shell, 2-base, 201-positioning column, 202-guiding groove, 203-conducting cavity, 3-key shaft core, 301-guiding column, 302-touch handle, 4-reset spring, 5-PCB, 6-static capacitor, 7-LED lamp, 8-film, 801-pressing bulge, 802-light-transmitting through hole, 9-light-guiding column, and 901-prismatic column array structure.

Detailed Description

The technical solution of the present invention is further described in detail with reference to the following specific examples, but the scope of protection and the implementation of the present invention are not limited thereto. The invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "top", "bottom", and the like refer to the orientation or position relationship shown in the drawings, or the orientation or position relationship that the utility model is usually placed when using, and are only used for distinguishing the description, and are only used for convenience and simplification of description of the present invention, and do not refer to or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the present invention, nor indicating or implying relative importance.

The utility model discloses a static capacitance triggers formula light guide key switch, it is shown with reference to fig. 1-3, including gluing shell 1, base 2 and key shaft core 3.

Wherein, have the jack catch that extends and tip incurve downwards on the gluey shell 1, and have on the outer fringe of base 2 with the bayonet socket that the jack catch corresponds, through the jack catch with the cooperation of bayonet socket, gluey shell 1 lock is in on the base 2. The key shaft core 3 is installed on the rubber casing 1 in a vertically telescopic manner, specifically, the outer edge of the key shaft core 3 is provided with a guide ridge, the inner wall of the rubber casing 1 is provided with a guide groove corresponding to the guide ridge, and the key shaft core 3 can realize directional vertical telescopic sliding on the rubber casing 1 through the matching of the guide ridge and the guide groove.

In an alternative embodiment, a positioning column 201 is disposed on one side of the base 2 facing the rubber housing 1. A guide groove 202 is formed in the middle of the positioning column 201; and one side of the key shaft core 3 facing the base 2 is provided with a guide column 301, and the guide column 301 is correspondingly matched with the guide groove 202 and can extend into the guide groove 202. When the key shaft core 3 is pressed, the guide column 301 can be positioned and extend into the guide groove 202.

A return spring 4 is provided between the key shaft core 3 and the base 2. Specifically, the return spring 4 is sleeved on the positioning column 201 and the guide column 301. Thus, the two ends of the reset spring 4 are respectively connected to the key shaft core 3 and the base 2. When the key shaft core 3 is pressed downwards, the return spring 4 is compressed and accumulates elastic potential energy; after the external pressing force is released, the key shaft core 3 automatically resets under the action of the elastic potential energy of the reset spring 4.

Referring to fig. 2 again, the key switch is disposed on the PCB 5, and the fixing pins on the base 2 penetrate through the bottom of the PCB 5 and then fixedly welded to the PCB 5, so that the entire key switch is fixedly disposed on the PCB 5.

In addition, the static capacitance triggered light guide key switch also comprises a static capacitance 6 arranged on the PCB 5 and an LED lamp 7. The static capacitor 6 and the LED lamp 7 are both welded on the PCB 5 and are both communicated with a circuit on the PCB 5; and the light that LED lamp 7 sent can be seen in gluing shell 1 and base 2 outside, plays the suggestion effect of switching on. When the key shaft core 3 is pressed downwards, the key shaft core 3 is pressed downwards to cause the capacitance capacity in the static capacitor 6 to change; the static capacitance 6 after changing the capacity will trigger the circuit on the PCB board 5 to switch on, simultaneously the LED lamp 7 switches on and gives out light, switches on the suggestion, improves and uses and experiences the sense. Optionally, the LED lamp 7 is a single-color LED lamp, a two-color LED lamp, or an RGB three-primary-color LED lamp, preferably an RGB three-primary-color LED lamp.

Specifically, in a preferred embodiment, the static capacitor 6 is disposed outside the axis of the key axis core 3. Moreover, the key shaft core 3 is provided with an integrated touch handle 302 which extends outwards and bends downwards, and the touch handle 302 corresponds to the static capacitor 6; and the base 2 is provided with a conducting cavity 203 for accommodating the touch handle 302 to extend and penetrate up and down. When the key shaft core 3 is pressed downward in this way, the touch lever 302 of the key shaft core 3 penetrates the through cavity 203 and causes the capacitance in the capacitance 6 to change in response to the pressing, thereby turning on the trigger switch of the capacitance 6.

In a preferred embodiment, as shown in fig. 2 and 3, a membrane 8 is also provided between the base 2 and the PCB board 5. In a specific alternative embodiment, the film 8 is a film made of silicone.

Here, the film 8 has a pressing protrusion 801 at a position corresponding to the electrostatic capacitance 6, and the pressing protrusion 801 is specifically a downward protrusion facing the electrostatic capacitance 6. In this way, in the process of pressing down the touch lever 302 of the key shaft core 3, specifically, the touch lever 302 contacts the pressing projection 801 on the pressing film 8, and indirectly presses the capacitance 6 via the pressing projection 801, thereby changing the capacitance of the capacitance 6. In addition, the film 8 has a light-transmitting through hole 802 corresponding to the LED lamp 7, and can receive light emitted from the LED lamp 7.

In another preferred embodiment, the key switch further comprises a light guide 9. The light guide column 9 is correspondingly arranged on the LED lamp 7; and one end of the light guide column 9 departing from the LED lamp 7 can be seen from the rubber shell 1 and the base 2. So, when LED lamp 7 took place the capacity change because static capacitance 6 and switches on and give out light, the light that sends will conduct through leaded light post 9 to by the one end that is visible outside gluey shell 1 and base 2 of leaded light post 9 disperse, thereby make light visible by the user.

Specifically, referring to fig. 2 and 3 again, the guide groove 202 is a through groove that penetrates in the axial direction, and a through hole that penetrates in the axial direction is provided in the middle of the guide column 301; the LED lamp 7 corresponds to the guide groove 202 and the guide post 301. The bottom end of the light guide column 9 is a large-diameter end, corresponds to the LED lamp 7 and is clamped outside the bottom of the base 2; the top end of the light guide column 9 passes through the guide groove 202 and extends into the middle through hole of the guide column 301, and the top end of the light guide column 9 can be seen outside the rubber case 1 and the base 2 through the middle through hole of the guide column 301.

Further, referring to fig. 4, an end surface of the light guiding column 9 facing away from the LED lamp 7 has a prismatic column array structure 901. The prismatic column array structure 901 can uniformly disperse the light which is transmitted to the light guide column 9 and is visible at one end outside the rubber shell 1 and the base 2, so that the glare is avoided, and the use experience is further improved.

Various technical features of the above embodiments may be combined arbitrarily, and for the sake of brevity, all possible combinations of the technical features of the above embodiments are not described in this specification. However, as long as there is no contradiction between combinations of these technical features, the scope of the present specification should be considered as being described. Furthermore, the above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention.

It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (8)

1. A static capacitance trigger type photoconductive key switch is characterized by comprising a rubber shell, a base and a key shaft core; the rubber shell is buckled on the base, and the key shaft core is telescopically arranged on the rubber shell; a return spring is arranged between the key shaft core and the base;

the LED lamp also comprises a static capacitor and an LED lamp which are arranged on the PCB; and when the key shaft core is pressed, the capacity of the static capacitor can be changed and triggered, and the LED lamp is switched on.

2. The electrostatic capacity triggered photoconductive key switch of claim 1, wherein the electrostatic capacity is arranged outside the axial center of the key shaft core; the key shaft core is provided with a touch handle which extends outwards and bends downwards, and the touch handle corresponds to the static capacitor; and the base is provided with a conduction cavity for accommodating the touch handle to stretch and penetrate up and down.

3. The electrostatic capacity triggered light guide key switch according to claim 1, wherein a film is disposed between the base and the PCB; and the part of the film corresponding to the static capacitor is provided with a pressing bulge, and the part of the film corresponding to the LED lamp is provided with a light-transmitting through hole.

4. The electrostatic capacity triggered light guide push switch according to claim 1, wherein a positioning column is disposed on one side of the base facing the rubber housing; a guide groove is formed in the middle of the positioning column; one side of the key shaft core facing the base is provided with a guide post correspondingly matched with the guide groove; when the key shaft core is pressed, the guide post can be positioned and extend into the guide groove.

5. The electrostatic capacity triggered photoconductive push switch of claim 4, wherein the return spring is sleeved on the positioning column and the guiding column.

6. The electrostatic capacity triggering type photoconductive key switch according to claim 4, wherein the guide groove is a through groove which penetrates in the axial direction, and a through hole which penetrates in the axial direction is formed in the middle of the guide column; the LED lamp corresponds to the guide groove and the guide post.

7. The electrostatic capacity triggered light guide key switch according to any one of claims 1 to 6, further comprising a light guide pillar; the light guide columns are correspondingly arranged on the LED lamps; and one end of the light guide column, which is deviated from the LED lamp, can be seen from the rubber shell and the base.

8. The electrostatic capacity triggered light guide key switch as claimed in claim 7, wherein an end surface of the light guide pillar facing away from the LED lamp has a prismatic pillar array structure.

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