CN115083818A

CN115083818A - Push-button

Info

Publication number: CN115083818A
Application number: CN202110275403.7A
Authority: CN
Inventors: 吴明翰; 陈宜玮; 张贤灿
Original assignee: Primax Electronics Ltd
Current assignee: Primax Electronics Ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2022-09-20
Anticipated expiration: 2041-03-15
Also published as: CN115083818B

Abstract

The invention provides a key, the key includes a protective cover and a key cap. The keycap has a deflector shoulder. When the protective cover and the keycap are bonded to each other with adhesive, the excess adhesive that overflows can be left on the diversion shoulder surface to prevent the excess adhesive from spreading to other areas.

Description

Push-button

Technical Field

The invention relates to a key; in particular to a key of a computer keyboard.

Background

In the structure of the computer keyboard, in order to prevent dust or liquid from entering gaps of the keys or flowing into lower holes, a layer of soft and elastic protective cover is usually used to cover the keycaps, so as to block dust and foreign matters, and meanwhile, the user can smoothly press down the keycaps to trigger signals through the elasticity and flexibility of the protective cover. Furthermore, in order to position the protective cover on the key cap, a part of the protective cover must be adhered to the top surface of the key cap, usually, glue is coated between the protective cover and the key cap to fix the protective cover and the key cap with the glue, the part of the protective cover coated with the glue is positioned on the key, and the area of the protective cover not coated with the glue can be freely and elastically stretched, so that the key cap is not hindered from moving up and down when being pressed.

However, when scribbling the viscose, no matter all can produce the inhomogeneous problem of viscose coating with machine or manual spraying, lead to too much viscose to spill over from the gap between protection casing and the key cap, the viscose that spills over this moment can flow to other regions on key cap surface, makes other positions that need not scribble the viscose also be infected with the viscose, lets the protection casing originally can freely tensile region also be infected with glues and attaches and fix at the key cap for the key cap is dragged and is hindered by the protection casing when reciprocating.

Disclosure of Invention

In order to solve the problems of the prior art, the invention provides a key. The key cap of button has water conservancy diversion shoulder face, and when the viscose spilled over from the gap between protection casing and the key cap, the viscose can be kept somewhere at water conservancy diversion shoulder face, can not spread toward other regions of key cap, makes the viscose can not be infected with the tensile region of protection casing elasticity, maintains pressing of button and feels and the effect.

In order to achieve the above object, the present invention provides a key, including:

a base plate;

an elastic element arranged on the bottom plate;

a supporting element arranged on the bottom plate and surrounding the elastic element;

a key cap disposed above the supporting element and connected to the supporting element, wherein the supporting element drives the key cap to approach or depart from the base plate, and the key cap has a top surface and a flow guiding shoulder surface; and

and the protective cover is covered on the top surface of the keycap, and an adhesive is coated between the protective cover and the top surface to ensure that the protective cover and the top surface are bonded with each other in an adhering way, so that the adhesive can be kept on the flow guide shoulder surface when overflowing the top surface.

Preferably, the flow guiding shoulder surface is disposed on the periphery of the key cap and surrounds the top surface.

Preferably, the angle of the flow guiding shoulder surface is larger than that of the top surface.

Preferably, the key cap has an outer wall surface, and the flow guiding shoulder surface is located between the outer wall surface and the top surface.

Preferably, the adhesive is retained on the flow guiding shoulder surface when the adhesive overflows the top surface, and the adhesive does not contaminate the outer side wall surface.

Preferably, the protective cover has a bonding surface and a stretching surface, the stretching surface is disposed at a periphery of the bonding surface, and the bonding surface is adhered to the top surface of the key cap.

Preferably, the bonding surface faces the top surface of the key cap and the flow guiding shoulder surface, and the adhesive only stains the bonding surface.

Preferably, the stretching surface does not contact the top surface of the key cap and the flow guiding shoulder surface.

The key provided by the invention can limit the overflowed viscose glue at the position of the flow guide shoulder surface, so that the viscose glue is not diffused and adhered everywhere, and the damage of the key structure caused by improper adhesion or the influence on the pressing stroke hand feeling are avoided.

Drawings

Fig. 1 is an exploded perspective view of a preferred embodiment of the present invention.

Fig. 2 is a perspective view of the preferred embodiment of the present invention.

FIG. 3 is a diagram illustrating a key pressing state according to a preferred embodiment of the present invention.

The reference numerals are explained below:

1: push button

10: bottom plate

11 switching circuit layer

20 elastic element

30 support element

40 key cap

41 top surface

42, flow guiding shoulder surface

43 outer side wall surface

50 protective cover

51 bonding surface

52 stretched noodles

60 adhesive

61 adhesive overflow

Angle of top surface

Angle of shoulder surface of diversion

U is the user

Detailed Description

The following description will be made in detail with reference to the accompanying drawings.

The key 1 of the present invention includes a base 10, a switch circuit layer 11, a resilient element 20, a supporting element 30, a key cap 40 and a protective cover 50. The switch circuit layer 11 is disposed on the bottom plate 10 for generating a key signal. The elastic element 20 is disposed on the bottom plate 10 and above the switch circuit layer 11 for triggering the switch circuit layer 11. The supporting member 30 is disposed on the base plate 10 and surrounds the elastic member 20, and the key cap 40 is disposed above the supporting member 30 and coupled to the supporting member 30. The supporting element 30 can drive the key cap 40 to approach or depart from the base plate 10, and when the key cap 40 is pressed, the supporting element moves toward the base plate 10 and presses down the elastic element 20, so that the elastic element 20 contacts the switch circuit layer 11 to generate a key signal. A protective cover 50 covers the key cap 40 to prevent dust, foreign matter or moisture from entering under the key cap. The protective cover 50 and the key cap 40 are bonded to each other by an adhesive 60, so that the protective cover 50 is positioned on the key cap 40, and the structure of the key cap 40 can limit the overflow range of the adhesive 60 and prevent the adhesive 60 from contaminating other components.

The structures of the key cap 40 and the protective cover 50 will be described in detail below. The key cap 40 has a top surface 41, a flow guiding shoulder surface 42 and an outer side wall surface 43. The top surface 41 is located on the top of the key cap 40, the outer side wall surface 43 is the outer peripheral wall of the key cap 40, the flow guiding shoulder surface 42 is disposed on the top periphery of the key cap 40 and surrounds the top surface 41, and the flow guiding shoulder surface 42 is located between the top surface 41 and the outer side wall surface 43. The protecting cover 50 has an abutting surface 51 and a stretching surface 52. The stretching surface 52 is disposed at the periphery of the bonding surface 51, and the bonding surface 52 is bonded to the top surface 41 of the key cap 40.

Referring to fig. 2, the protecting cover 50 covers the key cap 40, and the attaching surface 51 of the protecting cover 50 corresponds to the top surface 41 of the key cap 40, and the adhesive 60 is coated between the attaching surface 51 and the top surface 41, so that the protecting cover 50 and the top surface 41 are bonded to each other. When the amount of the viscose 60 between the binding surface 51 of the protective cover 50 and the top surface 41 of the key cap 40 is too much, the viscose overflows from a gap between the binding surface 51 and the top surface 41, the overflowing viscose 61 flows to the diversion shoulder surface 42 along the periphery of the top surface 41, the diversion shoulder surface 42 provides a buffering inclined surface to retain the overflowing viscose 61, the overflowing viscose 61 is prevented from continuously diffusing towards the outer surface, the overflowing viscose 61 is enabled not to be stained with the outer side wall surface 43 of the key cap 40, and the viscose is prevented from diffusing and being stained.

Further, the angle B of the diversion shoulder surface 42 is larger than the angle a of the top surface 41, the angle of the top surface 41 is a plane of 180 degrees, and the angle of the diversion shoulder surface 42 is 183 degrees to 195 degrees. Because the viscose 60 has the characteristics of coagulation property and stiffness after drying, the overflowed viscose 61 is gradually coagulated and slows down the flow on the flow guide shoulder surface 42, and then is coagulated and retained on the flow guide shoulder surface 42.

Please refer to fig. 3 for further explaining the key usage of the present invention, referring to the schematic diagram of the key pressing status according to the preferred embodiment of the present invention. The area of the attaching surface 51 of the protecting cover 50 is larger than the area of the top surface 41 of the key cap 40, and the range covered by the attaching surface 51 can correspond to the top surface 41 and the flow guiding shoulder surface 42, so that the adhesive 60 can only be stained on the attaching surface 51, and the stretching surface 52 of the protecting cover 50 can not contact the top surface 41 and the flow guiding shoulder surface 42 and can not be stained on the adhesive 60.

When user U presses protective cover 50 and key cap 40, key cap 40 will move toward bottom plate 10, and top surface 41 of key cap 40 will drive binding face 51 of protective cover 50 to move toward the bottom plate together, and tensile face 52 of protective cover 50 is in the state that can elastically stretch because it is not infected with viscose 60, therefore tensile face 52 can the elastic bending extend, let key cap 40 can stably descend to bottom plate 10 and trigger switch circuit layer 11.

The protecting cover 50 is a soft and elastic rubber sheet having good stretching elasticity. The shoulder surface 42 of the key cap 40 may be formed on the periphery of the top surface 41 of the key cap 40 by cutting or integral molding.

According to the key, the surface of the keycap can be reserved with redundant viscose and can limit the viscose from diffusing to other areas, so that the viscose is prevented from being infected with other areas or elements, and the key structure and the pressing function are maintained.

The above-described preferred embodiments of the present invention are not intended to limit the scope of the claims, and therefore, other equivalent changes and modifications may be made without departing from the spirit of the invention.

Claims

1. A key, comprising:

a base plate;

an elastic element arranged on the bottom plate;

2. The key of claim 1, wherein the flow guiding shoulder surface is disposed around the periphery of the key cap and surrounds the top surface.

3. The key of claim 1, wherein the angle of the deflector shoulder surface is greater than the top surface.

4. The key of claim 1, wherein the key cap has an outer wall surface, and the flow guiding shoulder surface is located between the outer wall surface and the top surface.

5. The key of claim 4, wherein the adhesive is retained on the flow guiding shoulder surface when the adhesive overflows the top surface, and the adhesive does not contaminate the outer side wall surface.

6. The key of claim 1, wherein the protective cover has a bonding surface and a stretching surface, the stretching surface is disposed at a periphery of the bonding surface, and the bonding surface is bonded to the top surface of the key cap.

7. The key of claim 6, wherein the attachment surface faces the top surface of the key cap and the flow guiding shoulder surface, and the adhesive only contaminates the attachment surface.

8. The key of claim 6, wherein the extended surface does not contact the top surface of the key cap and the deflector shoulder surface.