KR100852897B1 - Keyboard switch - Google Patents

Abstract

A keyboard switch is provided to resist external impact during transfer and to prevent an error due to foreign material by positioning a base unit at the lowest surface. A base unit(10) is positioned on a bottom surface of a keyboard switch(1). A PCB(Printed Circuit Board)(20) is positioned at an upper part of the base unit and includes a light emitting diode(23). A membrane switch unit(40) is positioned at an upper part of the PCB and includes a contact unit. An elastic moving unit(42) is installed at an upper part of the contact unit and connects the contact unit through elastic deformation. A scissors type link unit(50) includes a first link(51) and a second link(52). A key top(60) is rotatably fixed to a position at which one end of the first link and one end of the second link face each other.

Description

Keyboard Switch {KEYBOARD SWITCH}

1 is a view showing a keyboard switch in the prior art.

Figure 2 is an exploded perspective view of one embodiment of a keyboard switch of the present invention.

3 is a side cross-sectional view of one embodiment of the present invention.

4 is an enlarged view of A in FIG. 3.

5 is a side perspective view of a scissor type link unit in an embodiment of the present invention.

6A is a rear view of the key top of the embodiment of the present invention, and FIG. 6B is a cross-sectional view of the key top.

* Description of the symbols for the main parts of the drawings *

10: base portion 11: first hinge portion

12: second hinge portion 20: the printed circuit board

21: First Home 22: Second Home

23: LED 30: support plate

31: first receiving groove 32: second receiving groove

33: receptacle 40: membrane switch

41: contact part 42: elastic movable part

50: Caesar type link part 51: First link

52: second link 60: key top

The present invention relates to a keyboard switch, and more particularly, to a keyboard switch capable of installing a light emitting device for key top lighting under a key top.

Backlighting technology that consists of a transparent material for each key top such as a computer keyboard, an IPTV keyboard, or a remote controller, and illuminates the key top by emitting light through LEDs that can emit colors installed on the bottom of the key top. This is known.

This technique requires that a printed circuit board with an LED attached to the bottom of the key top and a supporting plate arrangement disposed above the circuit board to support the membrane switch for color implementation.

However, the membrane switch 200 is mounted above the base part 100 of the metal material as shown in FIG. 1 for the operation of the switch under the keyboard switch, and one end of the caesar type link part 300 is provided. The configuration is rotatably fixed to the base portion 100 and the other end is rotatably fixed to the key top 400.

In such a switch configuration, there is a problem in that it is difficult to mount a space for installing the printed circuit board and the support plate to which the LED is attached.

In order to solve this problem, a configuration in which a printed circuit board and a support plate are installed below the base unit 100 is also known. In this case, the printed circuit board is disposed at the bottom of the keyboard switch module.

Typically, the bottom surface of the keyboard switch module is made of a metal base 100 as shown in Figure 1 and the printed circuit board is disposed inside the upper portion of the base 100, according to the transport in the printed circuit board It acts to prevent insulation from impact or foreign substances.

However, in the above-described configuration, the printed circuit board connected to the LED is exposed to the outside so that such a function is not secured at all, and thus the keyboard switch may be damaged due to damage or insertion of foreign substances. This causes a problem of decreasing reliability.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problem, and provides a keyboard switch for attaching a printed circuit board with a light emitting element to enable backlighting in which light from an LED installed under the keyboard switch can reach a key top. It is technical problem to provide.

The present invention is a keyboard switch that can be provided a light emitting device for key top lighting in the lower key top in order to solve the above problems, a base portion disposed on the bottom surface of the keyboard switch, the light emitting element is disposed above the base portion A printed circuit board, a membrane switch portion disposed above the printed circuit board, the membrane switch portion including a contact portion, an elastic movable portion installed above the membrane switch portion and elastically deformed to connect the contact portion, and one end of the base portion. A first link having one end rotatably fixed to a first hinge portion formed at the second hinge portion, and a second link rotatably fixed at one end portion to a second hinge portion formed on an opposite side of the first hinge portion of the base portion; The first link and the second link is provided in the center, the scissor type link is connected to each other rotatably connected to each other And a key top to which the other end of the first link and the other end of the second link are rotatably fixed in a position opposite to each other, wherein the first hinge portion and the second hinge portion of the base portion protrude upwardly from the base portion. Characterized in that it is formed.

In the present invention, a support plate for supporting the membrane switch is disposed between the printed circuit board and the membrane switch.

In the present invention, an accommodation groove for accommodating any one or both of the first hinge portion and the second hinge portion is formed on at least one of the printed circuit board, the support plate, and the membrane switch.

In the present invention, at least one of the first hinge portion and the second hinge portion is formed as a concave portion or a convex portion, and at least one of one end of the first link and the second link rotates in the concave portion or the convex portion. It is characterized by being formed as a convex portion or a concave portion that is possibly coupled.

In the present foot, the concave portion is formed by a ring portion or a groove portion, and the convex portion is characterized in that the stone-shaped cylinder or rod shape.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 2 is an exploded perspective view showing an embodiment of the present invention. 3 is a side cross-sectional view of one embodiment of the present invention.

In the embodiment of the present invention, the keyboard switch 1 is disposed on the base part 10, the printed circuit board 20 placed on the base part 10, and the upper part of the printed circuit board 20. Rotating to the support plate 30, the membrane switch 40 supported by the support plate, the seeder type link portion 50 which is fastened so as to hinge pivotally to the base portion 10, and the seeder type link portion 30. It consists of a key top 60 which is possibly fixed.

The base portion 10 is made of a back metal plate material and is formed with a first hinge portion 11 extending upwardly and protruding upward of the base portion 10, and an annular convex portion at an end portion of the first hinge portion 11. The part 11a is formed.

A pair of second hinge portions 12 are formed on the opposite side of the first hinge portion 11 of the base portion 10. The second hinge portion 12 is formed in a rectangular shape that protrudes vertically upwardly of the base portion 10, and a recessed portion 12a having a groove shape is formed at an end thereof.

In the present embodiment, the first hinge portion 11 is formed in an annular shape, and the second hinge portion 11 is formed in a groove-shaped concave portion, but the first link 51 and the second link 52 are not limited thereto. Other configurations are possible as long as the hinge portion is configured to rotatably fix the end portion of the end portion to the base portion 10.

For example, it is also possible to make the 1st hinge part 11 into a groove-shaped recessed part, and to make the 2nd hinge part 12 ring-shaped, and both the 1st hinge part 12 and the 2nd hinge part 12 can be carried out. It is also possible to make it annular or both concave.

The LED 23 is fixed to the printed circuit board 20, and the first groove 21 through which the annular portion of the first hinge portion 11 of the base portion 10 penetrates is first hinge portion 11. It is formed at the top of the. In addition, a pair of second grooves 22 through which the rectangular second hinge portion 12 can penetrate is formed on the opposite side of the first groove 21.

The support plate 30 is made of a transparent material so that the light emitted from the LED 23 can pass therethrough, and like the case of the printed circuit board 20, the first receiving groove through which the ring portion of the first hinge portion 11 can pass. (31) The second receiving groove (32) formed on the first groove (21) of the printed circuit board (20) and through which the second hinge portion (12) of the rectangular shape passes through is a printed circuit board ( It is formed on the second groove 22 of 20.

In addition, a groove-shaped accommodating portion 33 for accommodating the LED 23 which is a light emitting element is formed on the lower surface of the support plate 30.

4 is an enlarged view of A in FIG. 3.

The membrane switch portion 40 is composed of three transparent PET films of the upper film 40a, the intermediate film 40b, and the lower film 40c, and the contact portion 41 is connected to the upper film 40a and the lower film 40c. ) Is formed.

The dome-shaped elastic movable portion 42 is formed of an elastic silicone material and is transparently fixed to the upper film 40a at the upper portion of the contact portion 41.

When the upper surface portion of the key top 60 is pressed by the user's finger, the dome-shaped upper surface portion of the elastic movable portion 42 is deformed and the contact portions 41 formed on the upper film 40a and the lower film 40c contact each other to switch. Connection is made.

The membrane switch in this embodiment is for the configuration in which the contact portion 41 is formed in the upper film 40a and the lower film 40c and connected in the vertical direction, but is not limited thereto. Any configuration can be used as long as the contact portion is connected.

For example, two fixed contact portions are formed on an intermediate film or a film composed of one sheet, and movable contacts are formed on the dome shape of the elastic movable portion to deform the dome shape of the elastic movable portion so that the two fixed contacts are connected to each other by the movable contact. A membrane switch in the form of a connection is also possible.

Meanwhile, a first through hole 43 through which the annular first hinge portion 11 can penetrate and a second second hinge portion 12 having a rectangular shape can be accommodated in the upper portion of the membrane switch 40. The through groove 44 is formed.

5 is a side perspective view of a scissor type link in one embodiment of the present invention.

The scissor type link portion 50 is configured such that two links 51 and 52 made of a substantially rectangular transparent material having an empty central portion are rotatable to cross each other so that the elastic movable portion 42 can be inserted.

One end of the first link 51 is formed with an annular convex portion 11a of the first hinge portion 11 and a groove-shaped recess 51a rotatably inserted.

The central side of the first link 51 has a convex cylindrical hinge portion 53 rotatably fastened to the side of the second link 52 so that both links 51 and 52 are centered on the hinge portion 53. You can act like a Caesar.

At the other end of the first link 51, a cylindrical convex portion 51b is arranged to be rotatably connected to the groove-shaped recess 62a of the second connecting portion 62 formed below the bottom of the key top 60. .

Cylindrical convex portions 52a formed on both sides of the other end of the second link 52 are rotatably connected to the groove-shaped concave portion 61a of the first connecting portion 61 formed on the bottom surface of the key top 60. .

On the other hand, cylindrical convex portions 52b are formed at both ends of one end of the second link 52 so as to be rotatably connected to the groove-shaped concave portion 12a of the second hinge portion 12.

6A is a rear view of the keytop of the embodiment of the present invention, and FIG. 6B is a cross-sectional view of the keytop.
In the hinge fastening between the first and second links 51 and 52 and the first and second hinges 11 and 12, one of them is formed as a convex portion and the other is formed as a concave portion, but is not limited thereto. It goes without saying that the parts can be formed interchangeably.

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The key top 60 is made of a transparent or semi-transparent material so that the light of the light emitting element can appear, the bottom front portion has a concave groove 61a shape corresponding to the protruding cylindrical portion 52a of the tip portion of the second link 52. This partially formed first connecting portion 61 is formed.

Further, at the rear of the bottom surface of the key top 60, a second connecting portion 62 is formed in which the concave groove 62b corresponding to the protruding cylindrical portion 51b of the rear end portion of the first link 51 is formed in the entire longitudinal direction. .

In the hinge fastening between the first and second links 51 and 52 and the first and second connecting portions 61 and 62 of the present embodiment, one is formed by a convex portion and the other is formed by a concave portion, but is not limited thereto. It goes without saying that the part and the convex part can be formed interchangeably.

In this way, the first hinge portion 11 and the second hinge portion 12 of the base portion 10 protrude upward and vertically above the base portion 100 so that the printed circuit board 20, the support plate 30, and the membrane It is rotatably connected to one end of each of the first and second links 51 and 52 through a groove formed in the switch 40.

Thus, it is possible to provide a keyboard switch that uses a scissor type link to place components for backlighting the keytop.

In addition, as the printed circuit board is disposed on the upper surface of the base portion 10, the keyboard switch module is not affected by impact or foreign matter even during transportation of the keyboard switch module.

The present invention has the effect of providing a keyboard switch which enables the light illuminated by the light emitting element on the bottom of the key to reach the key top by the above-described configuration.

In addition, by placing the base portion at the bottom surface, it has the advantage of being able to withstand physical shocks from the outside during transportation or transportation and to prevent functional failures due to foreign substances.

Claims (5)

As a keyboard switch that can be installed under the key top light emitting element for key top lighting, A base part disposed on a bottom surface of the keyboard switch, A printed circuit board disposed above the base part and having a light emitting element disposed therein; A membrane switch unit disposed above the printed circuit board and having a contact unit; An elastic movable part installed above the contact part of the membrane switch part and elastically deformed to connect the contact part; A first link having one end rotatably fixed to a first hinge portion formed at one end of the base portion, and one end rotatably fixed to a second hinge formed at an opposite side of the first hinge portion of the base portion; And a first link and a second link, the first link and the second link intersecting with each other at a center thereof and connected to each other in a rotatable manner; It has a key top that is rotatably fixed in a position opposite the other end of the first link and the other end of the second link, And a first hinge portion and a second hinge portion of the base portion are formed so as to protrude upward from the base portion. The method of claim 1, And a support plate for supporting the membrane switch between the printed circuit board and the membrane switch. The method according to claim 1 or 2, An accommodation groove for accommodating any one or both of the first hinge portion and the second hinge portion is formed in at least one of the printed circuit board, the support plate, and the membrane switch. The method according to claim 1 or 2, Convex portions or concave portions are formed on one or both of the first link one end and the second link one end, Any one or both of the end portion of the first hinge portion and the end portion of the second hinge portion is formed with a concave portion or a convex portion rotatably coupled to the convex portion or the concave portion. The method according to claim 1 or 2, Convex portions or concave portions are formed on one or both of the first link other end and the second link other end, Any one or both of the first connecting portion and the second connecting portion of the key top is formed with a concave portion or a convex portion rotatably coupled to the convex portion or the concave portion.

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