JP3352668B2 - Key switch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key switch device having a key top and a guide support member for guiding and supporting the vertical movement of the key top.

[0002]

2. Description of the Related Art Conventionally, various key switch devices have been proposed. In such a key switch device, generally, a key stem vertically provided from the back surface of a key top is vertically slid by a key holder portion formed on a holder plate. Configuration was adopted.

In a key switch device having such a configuration,
If the part where the key stem is slid and guided by the key holder part is enlarged, the key operability is improved, but it is not possible to respond to the thinning of the keyboard. There has been a dilemma in that if the sliding guide portion is made smaller, key operability is reduced due to the torsion occurring between the two.

[0004] The present applicant has eliminated the key stem and the key holder in order to eliminate such a dilemma in the conventional key switch, and has proposed a key switch device which can cope with a thin keyboard and has good key operability. −
This is proposed in the specification and drawings attached to the application of No. 330160. FIGS. 9 to 1 show such a key switch device.
It is shown in FIG. The detailed configuration of this key switch device will be described below with reference to the specification and drawings of Japanese Patent Application No. 3-330160.

In FIG. 9, a key top 1 made of resin is
Locking holes 4 and locking grooves 5 of two locking portions 2 and 3 (a pair of each locking portion 2 and 3 exist) provided on the back surface thereof
Locking portions 26, 2 of a resin holder plate 25 and
The guide support member 6 (including two resin link members 7 and 8) disposed between the lock groove 28 and the lock hole 29 of the lock member 7 (each of the lock portions 26 and 27 is a pair). The locking pins 13 and 14 provided at one end of the link member 7 are provided in the locking hole 4, and the locking pins 15 and 16 provided at the other end are provided in the locking groove 2.
8, locking pins 23 and 24 provided at one end of the link member 8 are locked in the locking groove 5, and locking pins 21 and 22 provided at the other end are locked in the locking holes 29. Up and down).

[0006] Axial support A of the link members 7 and 8
Is a flexible circuit board 3 supported on a support plate 32
The switching operation is performed by disposing the rubber spring 31 placed on the top of the rubber spring 31 and pressing the keytop 1 to buckle the rubber spring 31 via the shaft support A.

As shown in FIG. 10, the link member 7 is formed by integrally forming two base ends 10 and 11 at both ends of a base 9. A shaft 12 extends from one side surface of the central portion of the base 9, and the shaft 12 is supported by a shaft hole 20 formed in the other link member 8, which will be described later.
Locking pins 13 and 14 extend from the side surfaces of both end extending portions 10 </ b> A of the base end portion 10.
Reference numeral 14 denotes a lock which is locked in the locking hole 4 formed in the locking portion 2 of the key top 1 described above. Further, the base end portion 11 is formed in a U-shape in plan view, and the U-shaped both end extending portions 11 are formed.
Lock pins 15 and 16 similar to those described above extend from the side surface of A. The locking pins 15 and 16 are locked by locking portions 26 formed on the holder plate 25.

Further, as shown in FIG. 11, the link member 8 is formed by integrally forming two base ends 18 and 19 at both ends of a base 17. The shaft hole 2 is provided at the center of the base 17.
The shaft 12 provided on the base 9 of the link member 7 is inserted into the shaft hole 20 as described above. Also,
The base end portion 18 is formed in a U-shape in plan view, and locking pins 21 and 22 are extended from the U-shaped both end extending portions 18A. The locking pins 21 and 22 are locked by locking portions 27 formed on the holder plate 25.

Further, locking pins 23 and 24 similar to the above are extended from both end extending portions 19A of the base end portion 19, and the locking pins 23 and 24 are the locking portions 3 of the key top 1 described above. Is slidably locked in the locking groove 5 formed in the groove.

As described above, the guide support member 6 is formed by inserting the shaft 12 formed in the base 9 of one link member 7 into the shaft hole 20 formed in the base 17 of the other link member 8. The two link members 7 and 8 are mutually rotatable via a shaft support A formed by the shaft 12 and the shaft hole 17.

According to such a key switch device, a key switch device having good key operability while realizing a thinner keyboard can be realized as compared with a conventional key stem system.

[0012]

However, in the key switch device described in the specification and drawings of Japanese Patent Application No. 3-330160, when the key top 1 is not depressed, as shown in FIG. The support member 6 is in a state where the shaft support portions A of both link members 7 and 8 are urged upward by a rubber spring 31.
Is pressed to buckle the rubber spring 31 via the shaft support A to perform the switching operation.

As shown in FIG. 9, the lower portion of the link member 7 and the link member 8 below the crossing portion is inclined inward (deformed), and when the key top 1 is pressed down to the lowest position, The key switch device could not be made thinner by the amount of deformation.

At the time of assembling, after the linking work between the link members 7 and 8 and the locking portions 27 and 26 of the holder plate 25 is completed, the key top 1 is pressed into the guide support member 6. At this time, each locking pin 13, 1
Since the resilient operation is performed by using the resin elasticity between the lock members 4, 23 and 24 and the locking portions 2 and 3, the portions deformed inside the link members 7 and 8 also become unstable factors, and the key top 1 Could not be stably pressed into the guide support member 6.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and can reduce the thickness of a key switch device without sacrificing a key stroke, and can provide a key top. It is an object to provide a key switch device that can be stably assembled to a guide support member.

[0016]

In order to achieve the above object, a key switch device according to claim 1 is provided with a key top device.
It is connected to the lower surface and the holder
Guide support member that guides the vertical movement of the
A spring member that can be elastically deformed by an input operation
Switching operation is performed by elastic deformation of the spring member.
Switching part is formed and placed below the holder member
Circuit board and the circuit board placed below the circuit board.
A support plate for supporting the plate, and the guide support member
Link member and the second link member are mutually movable at the intersection.
And a first link member and a second link portion.
Each free end of the material is connected to the lower surface of the keytop and the holder member
A locked key switch device, comprising: a first link member;
And the second link member have the same length in side view.
And an end of the first link member and the second link member.
Of the first link portion is formed thinner than the center portion.
When the keytop is pressed, the material and the second link member
It is almost horizontal with the spring member folded
Place on the circuit board, and hold the upper part of the spring member
It protrudes upward from the material. Further, according to claim 2
The key switch device according to claim 1,
And provided on the lower surface of the key top,
One upper free end of the link member or the second link member
It locks as much as possible and expands as you go down
A rotation locking portion having a first guide portion opened like
Provided on the lower surface of the keytop, wherein the first link member or
The other upper free end of the second link member is slidably locked.
The second plan with a slope that extends downward
A sliding engagement portion having an interior formed therein, wherein the first link
The upper free end of the member and the second link member to the first guide
The rotation locking part and the slide are provided through a part and a second guide part.
It is characterized in that it snaps into the dynamic locking part.

[0017]

According to the present invention having the above construction, upon assembly of the key switch device, first, a first link member and the second link member to each other and disposed movably in cross section, the first link member and the second The link member and the link member are folded together.

[0018]

[0019]

The lower free end of the lower free end and a second link member of the first link member in a state the guide support member is the mutual folding <br/> or be as is, connecting locking the holder member Is done.

At this time, the first link member of the guide support member
And the second link member has the same length in side view
And a first link member and a second link member
When the key top is pressed,
Since it is almost horizontal, its handling is extremely easy.
As a result, the connecting and locking work between the guide support member and the holder member is performed.
Can be easily performed.

Next, the key top is placed on the first link member and the second link member, and the key top is stably assembled to the guide support member by lightly pressing the key top downward. Can be. At this time, the first phosphorus
The upper free ends of the link member and the second link member are connected to the first guide portion.
And on the lower surface of the key top via the second guide
Snap into the formed rotation locking part and sliding locking part.
Connection between the key top and the guide support member
Easy to do. Here, the key switch device
In addition to supporting the circuit board with a support member,
Place the spring member on the circuit board, and
The upper part is projected above the holder member.
Effective use of material thickness allows keystroke
To reduce the size of the keyboard.
I can respond .

When the switching operation is performed by the key switch device assembled as described above, the key top is pressed. Then, the keytop is guided downward via the guide support member with the depression. When the key top is pressed, the guide support member is also moved downward, whereby the spring member is elastically deformed and the circuit board slides.
The switching operation is performed in the switching section . Switching operation by pressing key top in this way
When performing the first link portion according to the descending operation of the key top
Even if the ends of the material and the second link member approach each other, the first
The ends of the link member and the second link member are
As it is formed in a thin shape, it can be
Can be prevented from coming into contact with each other. Therefore, the key
The key straw can be moved without disturbing the lowering movement of the top.
Can be maintained large.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a vertical cross-sectional view of the key switch device according to the present embodiment.
Numeral 1 is molded from a synthetic resin such as an ABS resin, and letters such as alphabets are formed on the upper surface thereof by printing or the like. Also, from the back surface of the key top 41, two locking portions 42, 43 (each locking portion 42, 43 has a pair in the direction perpendicular to the paper surface, and FIG. 1 shows only one of each pair). Is provided integrally with the key top 41 body downward.

The locking portion 42 has a locking groove 44 for rotatably locking a locking bar 53 formed at one end of one of two link members 47, 48 to be described later. The locking portion 43 is formed with a locking groove 45 for locking the locking pins 63 and 64 formed at one end of the other link member 48 so as to be slidable in the horizontal direction. I have.

The locking groove 44 is formed with a locking guide portion 44A which is continuous with the locking groove 44 and opened so as to gradually expand downward. 44A guides the locking rod 53 of the link member 47 toward the locking groove 44 when snapping into the locking groove 44. Further, the locking groove 4 of the locking portion 43
5 is provided with a locking guide portion 45A having a slope extending downward, and the locking guide portion 45A connects the locking pins 63 and 64 of the link member 48 with the locking grooves. It is guided toward the locking groove 45 when snapping into the inside 45.

Below the key top 41, a key top 1 is provided.
A guide support member 46 for guiding and supporting the up and down movement of the two members is provided.
7 and 48.

One link member 47 is formed in a U-shape in plan view as shown in FIG. 2 and has a pair of plate members 49 and a locking bar 53 between one ends of each plate member 49. Are formed integrally, and locking pins 55 and 56 are formed at the other end of each plate-like body 49. As described above, each plate-like body 49 includes the locking bar 53 and the locking pins 55, 5
6 is connected. The locking bar 53 is snapped into the locking groove 44 of the locking portion 42 via the locking guide portion 44A, and the locking pins 55 and 56 are provided on a holder plate 65 described later. Locked to the stop 66.

Further, a pair of shafts 52 are provided at positions facing each other from the central position on the side of each plate-like body 49 facing each other. Each of these shaft members 52 is supported by a shaft hole 60 formed in the other link member 48 described later. The locking bar 53 of the link member 47 and the locking pins 55 and 56 are configured so that the distance from each shaft 52 is equal.

Here, the central portion 80 of each plate-like body 49 has a predetermined height, as shown in FIGS. 5 to 8, and has a diagonal position on both sides of the central portion 80 (FIG. 5). And the like, a pair of extending portions 81 having a height approximately half the predetermined height of the central portion 80 is formed from the upper left position and the lower right position.

Further, as shown in FIG. 3, the other link member 48 has a pair of plate members 57, and a locking bar 61 is integrally formed between one end of each plate member 57. Locking pins 63 and 64 are formed at the other end of each plate-like body 57. As described above, each plate 57 is provided with the locking rod 61.
And the locking pins 63, 64. Both ends of the locking bar 61 are locked by locking portions 67 of a holder plate 65 described later, and the locking pins 63 and 64 are locked by the locking guide portion 45A. It is snapped into the groove 45.

Further, shaft holes 60 are formed at central positions facing each other on the outside of each plate-like body 57, and each plate-like body of the link member 47 is formed in each shaft hole 60. Each shaft 52 formed at 49 is rotatably fitted. As a result, the link members 47 and 48 are rotatable crossing each other via the shafts 52 and the shaft holes 60, and the shaft supporting portions A are formed by the shafts 52 and the shaft holes 60.
Is formed. The locking bar 61 of the link member 48 and the locking pins 63 and 64 are configured so that the distance from the shaft hole 60 is equal.

As shown in FIGS. 5 to 8, the central portion 82 of each plate 57 has the same height as the plate 49 of the link member 47. From a diagonal position on both sides of the central portion 82 (the lower left end position and the upper right end position in FIGS. 7 and 8), a pair of extending portions 83 having a height approximately half the height of the central portion 82. Are formed.

Further, between the central portions of the plate-like members 57, a rubber spring 71, which will be described later, is mounted on the upper surface, and each link member 4 is pressed when the key top 41 is pressed.
A push rod 58 is provided for pushing down the rubber spring 71 in accordance with the mutual rotation of 7 and 48. Thus, the pressing rod 58 presses the rubber spring 71 in accordance with the pressing of the key top 41 to perform a switching operation.

Next, a resin-made holder plate 65 is provided below the guide support member 46, and the holder plate 65 has a locking portion 6 corresponding to each switch device.
6 and 67 (two locking portions 66 and 67 are provided, respectively, but one locking portion 66 and 67 is shown in FIG. 1).

The engaging portion 66 is formed with a sliding groove 68 whose right side in FIG.
The locking pins 55 and 56 formed on the link member 47 are inserted into the sliding grooves 68. The locking portion 67 is formed with a sliding groove 69 whose opening on the right side in FIG. 1 is formed similarly to the sliding groove 68 of the locking portion 66.
Inside, a locking projection 69A having an inclined surface is formed on the right side in FIG. A locking rod 61 formed on the link member 48 is provided in the sliding groove 69 of the locking portion 67.
Are inserted at both ends. In addition, a pair of guide walls 7 for guiding the outer surface of each plate-like body 49 of the link member 47 between the locking portions 66 and 67 on the holder plate 65.
3 (see FIG. 4) is provided upright.

Thus, the locking pins 55 and 56 of the link member 47 in the guide support member 46 and the link member 48
The sliding rod 61 is slid on the holder plate 65 while guiding the outer surface of each plate-like body 49 of the link member 47 to each guide wall 73 from the open side of the slide groove 68 and the slide groove 69, respectively. Accordingly, the locking pins 55 and 56 and the locking rod 61 are inserted into the sliding grooves 68 and 69, respectively.
After the locking bar 61 has passed over the locking projection 69A in the sliding groove 69 at the time of such insertion, the locking bar 61 does not come off from the sliding groove 69. The rod 61 and the locking pins 55 and 56 are
It is held rotatably within 9, 68.

The holder plate 6 configured as described above
5, a flexible circuit board 70 on which switch electrodes 70A are formed corresponding to the respective key switches is arranged as shown in FIG. Rubber spring 71
Are mounted on the flexible circuit board 70. Further, a movable electrode 71A is fixed to the inner top wall of the rubber spring 71 so as to face the switch electrode 70A on the circuit board 70. A pressing rod 58 formed on the link member 48 is disposed on the upper surface of the rubber spring 71.

As a result, when the push rod 58 moves downward with the depression of the key top 41, the rubber spring 7
1 is depressed by the pressing rod 58, and when a certain pressing amount is exceeded, the rubber spring 71 is buckled, and the switching operation is performed by the contact between the movable electrode 71A and the switch electrode 70A on the flexible circuit board 70. is there.

A switch support plate 72 is provided below the flexible circuit board 70, and the switch support plate 72 is provided above each of the circuit boards 70,
This supports the holder plate 65.

In the above configuration, the locking portion 42 formed on the back surface of the key top 41 and the holding plate 45 formed on the back surface of the key top 41 located on the left side in FIG. A locking groove 44 and a locking bar 61 for rotatably locking the locking bar 53 are respectively provided in the stop portions 67.
Is provided in such a manner that the sliding groove 69 is rotatably locked in cooperation with the locking projection 69A. In addition, FIG.
The locking pins 43 and 64 and the locking pins 55 and 56 are respectively formed on the locking portion 43 formed on the back surface of the key top 41 and the locking portion 66 formed on the holder plate 65 on the right side of FIG. That is, the locking groove 45 and the sliding groove 68 that are slidably locked in the horizontal direction are provided.

Next, a method of assembling the key switch device configured as described above will be described with reference to FIGS.

First, the flexible circuit board 70 and the holder plate 65 are placed on the switch support plate 72, and each shaft 52 of the link member 47 is fitted into each shaft hole 60 of the link member 48 by using resin elasticity. Guide support member 4
Assemble 6.

Thereafter, each of the link members 47 and 48 is rotated and folded. At this time, the height of the central portion 80 of the plate-like body 49 in the link member 47 and the height of the central portion 82 of the plate-like body 57 in the link member 48 are formed at the same height. A pair of extending portions 8 formed at diagonal positions from both sides of each plate-like body 49 of the member 47
1, and a pair of extending portions 83 formed at diagonal positions from both sides of each plate-like body 57 of the link member 48 are both formed at a height of approximately の of the height of each link member. ing. Therefore, in a state where the link members 47 and 48 are folded together, each extension portion 81 of the link member 47 and each extension portion 83 of the link member 48 are overlapped, and as a result, the guide support member Reference numeral 46 indicates a substantially horizontal state as shown in FIG.

After the guide support member 46 is folded horizontally as described above, the locking pins 55, 5
6 and the locking rod 61 of the link member 48
The sliding grooves 68 and 69 are slid on the holder plate 65 into the respective sliding grooves 68 and 69 while being guided by the respective guide walls 73 from the open sides of the sliding grooves 68 and 69. Then, when further sliding, the locking rod 6 of the link member 48 is moved.
1 moves over the locking projection 69A formed in the sliding groove 69 from the slope side. This state is shown in FIG. Thus, the connection between the guide support member 46 and the holder plate 65 is completed.

As described above, the locking bar 61 of the link member 48
The connection between the sliding member 69 and the locking pins 55 and 56 of the link member 47 and the sliding groove 68
Since the guide support members 46 are slid only on the holder plate 65 from the open sides of the respective sliding grooves 68 and 69 after the horizontal folding of the guide support members 7 and 48, the guide support members 46 Of the guide support member 46 and the holder plate 65
The connection between is what can be done very easily. At this time, since the guide support member 46 is guided by the respective guide walls 73 at the time of sliding, the guide support member 46 does not come off from the respective slide grooves 68, 69, and therefore,
The connecting operation by such guide wall 73 is more easily row
It is possible.

Next, the locking rod 53 of the link member 47 and the locking groove 44 of the key top 41 held in the state shown in FIG. After facing the locking groove 45 of the top 41 (see FIG. 7), the key top 41 is lightly pressed down. As a result, the locking bar 53 of the link member 47 is snapped into the locking groove 44 while being guided by the locking guide portion 44A, and at the same time, the locking pins 63 and 64 of the link member 48 are locked by the locking guide portion 45A. Is snapped into the locking groove 45 while being guided. Such a state is shown in FIG. Thus, the connection between the guide support member 46 and the key top 41 ends.

As described above, the locking bar 53 of the link member 47
The connection between the key top 41 and the locking groove 44 of the key top 41 and the connection between the locking pins 63 and 64 of the link member 48 and the locking groove 45 of the key top 41 are changed from the state shown in FIG.
Since it is made only by pressing the 1 gently downwards, in which connection the guide support member 46 and the key top 41 can perform very easily.

The assembly of the key switch device is completed by the above-mentioned operation, but the connecting operation of each of the link members 47 and 48 with the holder plate 65 and the key top 41 can be performed very easily. The key switch device can be reliably assembled irrespective of the assembling ability of the operator, while simplifying the assembling work of the device and shortening the assembling time.

Next, the operation of the key switch device assembled as described above will be described.

When the key top 41 is pressed down, the locking bar 53 of the link member 47 rotates counterclockwise in the locking hole 44 of the locking portion 42 as the key top 41 moves downward. At the same time, the locking pins 63, 6 of the link member 48
Reference numeral 4 slides horizontally (rightward in FIG. 1) in the locking groove 45 of the locking portion 43. At the same time, the link member 48
The locking rod 61 of the holder plate 65 has a locking portion 67.
Is rotated clockwise in cooperation with the locking projection 69A in the sliding groove 69, and the locking pin 5 of the link member 47 is rotated.
Reference numerals 5 and 56 denote horizontal directions in the sliding groove 68 of the locking portion 66 (FIG. 1).
To the right).

When the key top 41 is depressed, the guide support member 46 is restricted between the guide walls 73 in the left-right direction in FIG. 4, so that the key top 41 is prevented from rattling unnecessarily.

As a result, the shaft supporting portion A for supporting the link members 47 and 48 mutually moves downward and gradually presses down the rubber spring 71, and when the pressing amount exceeds a certain limit, the rubber support 71 is pushed down. The spring 71 is buckled. Thereby, the movable electrode 7 in the rubber spring 71
1A is the switch electrode 70 on the flexible circuit board 70
A is short-circuited and a predetermined switching operation is performed .

When the depression of the key top 41 is released, the shaft supporting portions A of both link members 47 and 48 become rubber springs 71.
It is pushed upward by the elastic restoring force of. Accordingly, the locking bar 53, the locking pin 55 of the link member 47,
56, the locking bar 61 of the link member 48, the locking pin 6
3,64 performs the operation opposite to the operation described above, as a result,
The key top 41 is returned to the original position.

Here, the locking rods 53 and 61 are not moved in the horizontal direction, but only rotate in the locking groove 44 and the sliding groove 69, respectively. The key top 1 is moved up and down without being moved.

As described in detail above, in the key switch device according to the present embodiment, when assembling the key switch device,
After each of the link members 47 and 48 is folded horizontally to be in a horizontal state, the locking pins 55 and 56 of the link member 47 and the locking bar 61 of the link member 48 are moved to the respective locking portions 66 and 67.
Each of the sliding grooves 6 on the holder plate 65 is guided by the respective guiding wall 73 from the open side of the sliding grooves 68 and 69 in FIG.
8 and 69, and by sliding until the locking rod 61 of the link member 48 gets over the locking projection 69A formed in the sliding groove 69, the guide support member 46 and the holder plate 65 Concatenation
The guide support member 46 and the holder plate 65
Can be extremely easily connected.

In particular, when the guide support member 46 slides,
Since the guide support member 46 is reliably guided by the guide walls 73 toward the sliding grooves 68 and 69, the guide supporting member 46 does not come off from the sliding grooves 68 and 69. The connection work can be more easily performed by the guide wall 73.

The guide support member 46 and the key top 41
When the connection is performed , the locking bar 53 of the link member 47 and the locking groove 44 of the key top 41 are opposed to each other, and the locking pins 63 and 64 of the link member 48 are locked with the key top 41. After the groove 45 is opposed to the groove 45, the key top 41 is lightly pressed down, so that the locking rod 53 of the link member 47 is snapped into the locking groove 44 while being guided by the locking guide portion 44A. The locking pins 63 and 64 of the link member 48 are snapped into the locking grooves 45 while being guided by the locking guide portions 45A.
The connection between the key top 41 and is intended to be carried out very easily.

Further, in the key switch device assembled by the simple assembling operation as described above, the link member 47 is provided.
The locking bar 53 is rotatably held without moving in the locking groove 44 of the locking portion 42 and the link member 48
The locking bar 61 is rotatably held without moving in cooperation with the locking projection 69A in the sliding groove 69, and the movement of the guide support member 46 is restricted between the pair of guide walls 73. As a result, the key top 41 is prevented from being moved in any of the front, rear, left, and right directions during the key operation. As a result, key operability can be significantly improved.

The height of the central portion 80 of the plate-like body 49 in the link member 47 constituting the guide support member 46 and the height of the central portion 82 of the plate-like body 57 in the link member 48 are the same. And a pair of extending portions 81 formed diagonally from both sides of each plate-like body 49 of the link member 47, and a pair of extension parts 81 from both sides of each plate-like body 57 of the link member 48. A pair of extending portions 8 formed at corner positions
Reference numeral 3 is formed to be approximately half the height of each link member.

Accordingly, in a state where the link members 47 and 48 are mutually folded, the respective extension portions 81 of the link member 47 and the respective extension portions 83 of the link member 48 are overlapped. As a result, The guide support member 46 can be made substantially horizontal. Thus, the guide support member 46 can be easily handled at the time of assembling the key switch device, and the assembly of the holder plate 65 and the guide support member 46 can be performed more easily.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various improvements and modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, the locking projection 69A is provided in the sliding groove 69 of the locking portion 67.
However, such a locking projection may be formed in the sliding groove 68 of the locking portion 66.

[0063]

As described above, in the key switch device according to the first aspect of the present invention, the first link member and the second link member are provided.
The lock member is formed to have the same length in side view.
The first link member and the second link member are key tops.
When you press, it will be almost horizontal with each other folded
And the handling is very easy,
It is easy to connect and lock the support member and the holder member.
It becomes possible. Also, press the keytop to switch
When performing the keying operation, the first
The ends of the link member and the second link member are close to each other
Also, the ends of the first link member and the second link member are at the center.
Because it is formed thinner than the
The end portions can be prevented from coming into contact with each other during descending. Follow
The key top without lowering the key top movement.
A large stroke can be maintained. Furthermore, the circuit
The substrate is supported by a support member and a spring member
Is placed on the circuit board, and the upper part of the spring member is
Since it is projected above the member, the thickness of the holder member is effective.
The keystroke can be increased by using
And can respond to the thinner keyboard.
Wear. In the key switch device according to the second aspect, the key is
-Combination of the top, the first link member and the second link member
Standing can be done by snap-in method, so key
The top and guide support members can be easily assembled
You.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a key switch device.

FIG. 2 is a plan view of one link member.

FIG. 3 is a plan view of the other link member.

FIG. 4 is a cross-sectional view of the key switch device.

FIG. 5 is an explanatory diagram showing a state before a guide support member is connected to a holder plate.

FIG. 6 is an explanatory view showing a state after the guide support member is connected to the holder plate.

FIG. 7 is an explanatory view showing a state in which a key top is arranged on a guide support member connected to a holder plate.

FIG. 8 is an explanatory diagram showing a state in which a key top is connected to a guide support member connected to a holder plate.

FIG. 9 is a longitudinal sectional view of a conventional key switch device.

FIG. 10 is a plan view of one link member used in a conventional key switch device.

FIG. 11 is a plan view of the other link member used in the conventional key switch device.

[Explanation of symbols]

 41 Key top 42, 43, 66, 67 Locking portion 44, 45 Locking groove 44A, 45A Locking guide portion 46 Guide support member 47, 48 Link member 55, 56, 63, 64 Locking pin 65 Holder plate 68, 69 Sliding groove 69A Locking projection 71 Rubber spring 73 Guide wall

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-62017 (JP, A) JP-A-64-7441 (JP, A) JP-A-4-76224 (JP, U) JP-A-2-76 5236 (JP, U) European Patent Application Publication 490023 (EP, A1) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 13/14

Claims (2)

(57) [Claims] 1. A lower surface of a key top and a holder portion thereunder.
A guide that guides the vertical movement of the key top by connecting and locking to the material
A support member, and a spur elastically deformable by an input operation using the key top.
Switching operation due to elastic deformation of the ring member and its spring member
A switching part is formed under the holder member.
A circuit board disposed below the circuit board and a support disposed below the circuit board to support the circuit board.
A support plate, and the guide support member is provided with a first link member and a second link member.
Are arranged so as to be mutually movable at a crossing portion, and the first
The free ends of the link member and the second link member are
Key switch connected and locked to the lower surface of the cap and the holder member
Apparatus, wherein a side view of the first link member and the second link member
And the end of the first link member
Part and the end of the second link member are thinner than the center part
Forming the first link member and the second link member,
When pressing down on the flip-flops, the
And placing the spring member on a circuit board.
That the upper part of the member is projected above the holder member.
Characterized key switch device. 2. The apparatus according to claim 1, wherein the key top is provided on a lower surface of the key top, and
One upper free end of the first link member or the second link member
While pivotally locking it, and expanding downward.
A pivot locking portion having a first guide portion opened so as to be bent
When, A first link member provided on a lower surface of the key top;
Alternatively, the other upper free end of the second link member is slidably engaged.
Stop and have a slope that extends downward
A sliding engagement portion formed with two guide portions, Upper free ends of the first link member and the second link member
Through the first guide portion and the second guide portion.
It features snap-in to dynamic locking parts and sliding locking parts.
The key switch device according to claim 1, wherein