JP3201380B2 - Key switch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a key top and a holder.
It relates key switch to perform a switching operation in the switching member with the guide support member guides and supports the vertical movement of the key top through a key top vertical movement that is disposed between the timber, in particular, draft The present invention relates to a key switch device capable of easily connecting a key top to an inner support member and simplifying assembly.

[0002]

2. Description of the Related Art Conventionally, as a key switch device used for this type of keyboard, a key member integrally having a key stem is inserted into a key holder portion formed on a holder plate to guide and support the key member. A key switch device provided with a switching member is generally used. In such a key switch device, the vertical movement of the key stem of the key member is slidably guided through the key holder portion, and the switching member is operated by the lower portion of the key stem when the key member is pressed, thereby performing a switching operation.

A key operation is performed by such a key switch device.
If it does, since the vertical movement of the key member are made to slide guide key stem of the key member through a key holder portion of the holder plate as, pressed position of the key member (e.g., a central portion of the key member In some cases, the key member may move up and down in an inclined state. As described above, if the key member moves up and down in an inclined state, a twist occurs between the key stem and the key holder portion, and as a result, serious trouble occurs in key operation, and in some cases, the key member is pressed. It is also possible that it will not be possible.

To solve such a problem , Japanese Patent Application Laid-Open Nos. 60-62017 and 64-71987 disclose a method of preventing a key from being pressed in an inclined state when the key is pressed.
A key switch device described in Japanese Patent No. 441 is known.

The key switch device described in Japanese Patent Application Laid-Open No. Sho 60-62017 supports a key member on two scissor-like members intersecting in a scissor-like manner with a shaft.
A switching member is arranged at a position distant from the center of the key member, and when the key member is pressed, a plurality of pins formed at the end of each scissor-shaped member are horizontally moved between the back surface of the key member and the top surface of the substrate. In addition, the switching member is pressed by the pressing portion while the pressing portion specially provided on the key member is slid up and down through the holder portion.

Further, the key switch device described in Japanese Patent Application Laid-Open No. 64-7441 is capable of pivotally positioning between each pin formed on the scissor-like member and the back surface of the key member. It has the same basic configuration as the key switch device described in the former, and is characterized in that the key member can be easily attached to and detached from the scissor-like member.

The key switch devices described in these publications can guide up and down movement of a key while maintaining a horizontal state regardless of the pressed position of the key.

[0008]

However, in the key switch device described in Japanese Patent Application Laid-Open No. 60-62017, a switch tappet formed on a carrier attached to the back surface of the key cap has a central portion of the key cap. Due to the shift, the holes of the board for arranging the switch body are arranged at positions shifted from the center position of each guide pocket formed in the non-movable key portion attached to the board. When the switching operation of the switch body is performed by such a key switch device, regardless of which position of the key cap is pressed, the switch body is moved via the switch tappet at a position shifted from the center position of each guide pocket in the non-movable key portion. Thus, the switching operation is performed.

In such a case, each pin of the scissor-like member is provided between the tongue of the carrier and the back of the keycap, and
Very since not engaged only loosely in the guide pocket, to guide the vertical movement actually while maintaining a horizontal state of the key cap it is difficult, in this
Thus, there is a problem that the switching operation of the switch body becomes unstable compared to the case where the switching operation of the switch body is performed at the center position of each guide pocket.

In the case of the key switch device described in Japanese Patent Application Laid-Open No. 64-7441, the opening / closing dome arranged in the plate is provided with a guide formed on a guide fixed on the plate. The opening / closing dome is located at a position shifted from the center position of the engaging slit, so that the opening / closing dome can be pressed regardless of the position of the key head as in the case of the key switch disclosed in Japanese Patent Application Laid-Open No. 60-62017. The switching operation is performed at a position shifted from the center position of each engagement slit via a key ram formed at a position shifted from the center position of the key head. In such a case, similar to the above,
The problem remains that the switching operation of the opening and closing dome becomes unstable compared to the case where the switching operation of the opening and closing dome is performed at the center position of each engagement slit.

In the key switch device described in each of the above publications, the key cap and the key head are formed on the key cap and the key head to lock a link member (arm or shear) for guiding the key head up and down. Since the locking groove and the slit are formed in a direction (horizontal direction) perpendicular to the pressing direction of the key cap or the like, the link member (arm,
The shearing lock between the keycap and keyhead
This is very difficult, and therefore, the link member and the keycap cannot be easily connected and locked, which causes a problem that the assembly of the key switch device becomes complicated.

The invention der is, the key switch which can easily perform the assembly to facilitate connection engagement of the key top for draft within a support member which has been made to solve the problems of the prior art It is intended to provide a device.

[0013]

Means for Solving the Problems] To achieve the above object the present invention includes a keytop first engagement portion and the second engagement portion is formed on the back surface, below the first locking portion of the key Toppu 4th
A third engaging portion below the locking portion and the second locking portion of the key top;
A holder member which retaining portion is formed, a first link member having a first locking member and the third third engaging member is engaged with the securing portion secured to the first locking part, the A second link member having a second locking member locked by the second locking portion and a second link member having a fourth locking member locked by the fourth locking portion are arranged in a mutually movable state , a guide support member for guiding the vertical movement of the key Toppu, similar substantially central position between the third engagement portion and the fourth engagement portion, the switching operation in accordance with the vertical movement of the key Toppu
A first engaging portion and a second engaging member.
The stop portion, key Toppu is open in the push direction, and guide portion of the first locking member and the second locking member to the proposals be formed, the third engagement portion and the fourth engagement portion It is formed on Suridogakari stop portion the fourth locking member for locking slidably third engagement member and the second link member of the first link member, the first link
Fourth engaging member of the third engagement member and the second link member of the member is slidably engaged with the respective sliding locking unit, key Toppu is, and a first link member and the second link member first engaging the <br/> first locking member and the second locking member via the draft internally substantially horizontal state
It is attached to the guide support member by snapping into the stop portion and the second locking portion .

[0014]

In the key switch device according to the present invention having the above-mentioned structure, when the key top is depressed during the switching operation, the key top is vertically moved and guided via the guide support member with the depression. At this time, the first locking member of the first link member constituting the guide support member is locked by the first locking portion formed on the back surface of the keytop, and the third locking member is formed by the holder member. locked to the third locking portion, which is, also, the second locking member of the second link member second locking
And the fourth locking member is locked to the fourth locking portion, and the first link member and the second link member are arranged in a mutually movable state. . Thus , the key top is moved downward while keeping the horizontal state regardless of the pressed position. Then, with the pressing operation of the key top, the third locking of the holder member is performed .
Parts and placed by a switching member in a substantially central position between the fourth locking unit performs a switching operation.

[0015] Here, in the key switch, the switching member, a third formed Holder member
Since the switching member is arranged at a substantially central position between the locking portion and the fourth locking portion , the switching operation of the switching member is performed through the substantially central portion of the keytop at the time of the switching operation regardless of the pressed position of the keytop. Therefore, a reliable switching operation can always be performed. Also, a first link is provided on the first locking portion and the second locking portion of the key top .
For locking the second locking member of the first locking member and the second link members of the members, draft <br/> and internally formed which is open in the push direction of the key top, also, the holder member Third locking part
When the fourth engaging portion is slidable for slidably engaging the fourth engagement member of the third engagement member and the second link member of the first link member
Because it is formed in the locking portion, in a fourth state in which the locking member engaged with the Suridogakari locking portion <br/> of the third engagement member and the second link member of the first link member, and, First link member and second link
By a simple operation of lightly pressing the key top with the member being substantially horizontal , the first locking member and the second locking member are
Respectively via the guide portion of the first locking portion and the second locking portion their
It is possible to snap from the open side to the first engagement portion and the second engagement portion of the. Thereby, the assembling work of the key switch device can be easily performed.

On the other hand, when the pressing of the keytop is released, the reverse operation is performed based on the elastic restoring force of the switching member, and the keytop is moved upward via the guide support member. Thereby, the key top is returned to the original non-pressed position.

[0017]

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 a key switch device according to the present embodiment.
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 1, two locking portions 2, 3 (each locking portion 2, 3 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 1 body downward.

The locking portion 2 has two link members to be described later.
( Hinge member ) One of the link members 7 and 8 (the
A locking groove 4 for locking a locking bar 13 formed at one end of one ( 1 link member) slidably in the horizontal direction is formed, and the other link member 8 ( Second link section
A locking groove 5 for locking the locking pins 23, 24 formed at one end of the material) so as to be slidable in the horizontal direction. As shown in FIG. 1, each of the locking grooves 4 and 5 is opened in the direction in which the key top 1 is pressed (downward).

The locking groove 4 is formed with a locking guide portion 4A which is continuous with the locking groove 4. The locking guide portion 4A connects the locking rod 13 of the link member 7 with the locking groove. The guide guides toward the locking groove 4 when snapping into the inside. Further, the lower position of the locking groove 5 of the engaging portion 3 is engaging guide portion 5A is provided, such anchoring guide unit 5A Li
The snap pins 23 and 24 of the link member 8 are guided toward the locking groove 5 when snapping into the locking groove 5.

Further, a pair of locking claws 34 are vertically provided integrally with the key top 1 from both side edges on the back surface of the key top 1, and a locking projection 35 is provided at a lower end of each locking claw 34. ing. Each of the locking claws 34 is formed by a pair of claw guide grooves 33 of a pair of guide walls 33 erected on a holder plate 25 described later.
A, and each locking projection 35 is locked to a lower end surface of a closing portion 33C provided at an upper end of the guide wall 33 (see FIG. 4).

A guide support member 6 for guiding and supporting the vertical movement of the key top 1 is provided below the key top 1, and the guide support member 6 includes two link members 7 and 8.

One link member 7 is formed in a U-shape in plan view as shown in FIG. 2 and has a pair of plate members 9 and a locking bar 13 between one ends of each plate member 9. (First locking member) is formed integrally, and locking pins 15 and 16 (third locking member) are formed at the other end of each plate-like body 9. The locking bar 13 is snapped into the locking groove 4 of the locking portion 2 via the locking guide portion 4A, and the locking pins 15 and 16 are provided on a holder plate 25 to be described later. It is snapped into the stop 26.

The shaft 1 is located at a central position opposing each other on both the inside and outside of each plate-like body 9.
2A, 12B are formed, the shaft 12A is described later Li
Each of the plate members 17 of the link member 8 is rotatably supported by a corresponding one of the shaft holes 20. Further, the shaft body 12B is provided with a shaft guide groove 33 of a guide wall 33 erected on a holder plate 25 described later.
B is fitted inside. The locking bar 13 of the link member 7 and the locking pins 15 and 16 are configured so that the distances from the shafts 12A and 12B are equal.

Further, as shown in FIG. 3, the other link member 8 has a pair of plate members 17 and a locking bar 21 (fourth locking member) is provided between one end of each plate member 17. The locking pin 2 is formed integrally with the other end of each plate-like body 17.
3 and 24 (second locking members) are formed. Both ends of the locking bar 21 are locked by locking portions 27 of a holder plate 25 described later, and the locking pins 23 and 24 are locked by the locking guide portion 5A. It is snapped into the groove 5.

Further, between the central portion position inside the respective plate-shaped body 17, while being placed on the upper surface of the rubber spring 31 to be described later, each link when the pressed key top 1
The rubber spring 31 is driven by the mutual rotation of the members 7 and 8.
There is provided a push rod 18 for pushing downward. Thus, when the key top 1 is pressed, the pressing rod 18 presses the rubber spring 31 to perform a switching operation.

A shaft hole 20 is formed at a central position facing each other on the outside of each of the plate members 17, and each of the plate members 9 of the link member 7 is formed in each of the shaft holes 20.
Are axially supported so as to be rotatable. Thereby, both link members 7 and 8 are rotatable crossing each other via each shaft body 12A and shaft hole 20, and each shaft body 12A and shaft hole 20 allow the shaft support portion A (FIG. 4) is formed. The locking bar 21 of the link member 8 and the locking pins 23 and 24 are configured so that the distances from the shaft holes 20 are equal.

Next, a resin holder plate 25 (holder member) is disposed below the guide support member 6.
The holder plate 25 is provided with two locking portions 26 and 27 corresponding to the respective switch devices (two locking portions 26 and 27 are provided respectively, but FIG. 1 shows one locking portion 2).
6, 27) are formed. The holder plate 25 is provided with a mounting hole H for positioning and positioning a rubber spring 31 (described later) at a substantially central position between the locking portions 26 and 27 (see FIG. 4).

Each of the locking portions 26 and 27 includes a pair of locking pieces 26A and 26B and a pair of locking pieces 27A and 27B, respectively.
Each of the locking pieces 26A, 27A is formed with locking guide portions 26C, 27C having inwardly inclined surfaces. Further, both locking pieces 2 in the locking portion 26
6A and 26B, a locking groove 28 is formed. In the locking groove 28, the locking pin 1 formed in the link member 7 is formed.
5 and 16 are snapped in via the resin elasticity of the locking guide portion 26C. Furthermore, both locking pieces 27 in the locking portion 27
A and 27B form a locking groove 29 similar to the locking groove 28. In the locking groove 29, both ends of the locking rod 21 formed in the link member 8 are formed of a resin of the locking guide portion 27C. Snap-in via elasticity.

Further, on the holder plate 25, a pair of guide walls 33 (see FIG. 4) for guiding the outer surface of each plate-like body 9 of the link member 7 between the both locking portions 26, 27.
Is erected. As shown in FIGS. 4 to 6, each guide wall 33 has a claw guide groove 33 </ b> A on its outer side for guiding a locking claw 34 formed on the key top 1 in a vertical direction.
The shaft guide groove 33B that slides and guides the shaft body 12B of the link member 7 inside the claw guide groove 33A, and the upper end of the claw guide groove 33A to lock the lower end of the locking protrusion 35 of the locking claw 34. A closed portion 33C that is closed is provided.

The holder plate 2 configured as described above
As shown in FIG. 4, a flexible circuit board 30 on which a switch electrode 30A is formed corresponding to each key switch is arranged below 5, and an inverted cup shape corresponding to the switch electrode 30A. Rubber spring 31
Are placed on the flexible circuit board 30 while being positioned and arranged in the mounting holes H formed in the holder plate 25. Further, the switch electrode 30 on the circuit board 30
A movable electrode 31A is fixed to the inner top wall of the rubber spring 31 facing A. The push rod 18 formed on the link member 8 is disposed on the upper surface of the rubber spring 31.

As a result , when the push rod 18 moves downward with the depression of the key top 1, the rubber spring 31
There is pressed by the pressing rod 18, in which the switching operation is performed by the rubber spring 31 is buckled and the switch electrode 30A on the movable electrode 31A and the flexible circuit board 30 contacts exceeds a certain depression amount .

A switch support plate 32 is provided below the flexible circuit board 30, and the switch support plate 32 is provided above each of the circuit boards 30,
This supports the holder plate 25.

Next, the operation of the key switch device configured as described above will be described. First, in the non-pressed position of the key top, as shown in FIG.
Is locked to the closing portion 33C of the guide wall 33, so that the key top 1 does not move unnecessarily in the left-right direction in FIG. There is no end.

When the key top 1 is depressed downward, as the key top 1 moves downward, each locking claw 3 is moved.
4 is slidably guided downward along the claw guide groove 33A of the guide wall 33. Thus, the key top 1 is not moved in the left and right directions in FIGS. 1 and 5 when the key top 1 is pressed.

Furthermore, in accordance with the movement of the lower key top 1, with slides (left direction in FIG. 1) engaging rod 13 horizontally inside the locking groove 4 of the engaging portion 2 of the link member 7, engaging pins 23 and 24 of the link member 8 slides in the horizontal direction in the engaging groove 5 of the engaging portion 3 (the right direction in FIG. 1). At the same time, the engaging bar 21 of the link member 8 is similar to the engagement Tomebo 13, the horizontal direction in the locking groove 29 of the locking portion 27 of the holder plate 25 (left direction in FIG. 1)
And the locking pins 15, 1 of the link member 7
6 slides in the horizontal direction (right direction in FIG. 1) in the locking groove 28 of the locking portion 26, like the locking pins 23 and 24.

At the same time, the link member 7 and the link member 8 rotate relative to each other about the shaft support A, and accordingly, the shaft support A moves downward. When the shaft support portion A moves downward, the outer surface of each plate-like body 9 in the link member 7 moves downward along the inner wall surface of each guide wall 33 and the shaft formed on each plate-like body 9. The body 12B is slidably guided along the shaft guide groove 33B of each guide wall 33. Therefore, even from this point, when the key top 1 is pressed, the key top 1 is not moved in the left-right direction in FIG. Further, since the key top 1 is moved while being supported by the link members 7 and 8 , the key top 1 does not move in an inclined state when the key top 1 is pressed.

As a result, the push rod 18 of the link member 8 is moved downward, and the rubber spring 31 is gradually pushed down. When the pushed amount exceeds a certain limit, the rubber spring 31 buckles. Is done. Thus, the movable electrode 31A in the rubber spring 31 short-circuits the switch electrode 30A on the flexible circuit board 30, and a predetermined switching operation is performed.

When the key top 1 is released, the link is released.
The push rod 18 of the member 7 is pushed upward by the elastic restoring force of the rubber spring 31. Along with this, the Li
Locking rod 13, locking pins 15, 16 of link member 7, and
The locking bar 21 and the locking pins 23 and 24 of the link member 8 perform operations reverse to those described above, and as a result, the key top 1 is returned to the original position.

As described above, even when the key top 1 returns to the original non-pressed position, each locking claw 34 is slid and guided upward along the claw guide groove 33A of the guide wall 33.
The key top 1 is not moved in the left-right direction in FIGS. 1 and 5 when returning. In addition, the outer surface of each plate 9 in the link member 7 moves upward along the inner wall surface of each guide wall 33, and the shaft 12 </ b> B formed on each plate 9 is The key top 1 is not slidably guided along the guide groove 33B, so that the key top 1 is not moved in the left-right direction in FIG.

As described above, the key top 1 is unnecessarily front-rear (left-right direction in FIGS. 1 and 5) and left-right direction both when it is pressed and when it returns to the original non-pressed position. (Left and right direction in FIG. 4). In this embodiment,
Since the key top 1 is moved while being supported by the link members 7, 8, it is possible to prevent the key top 1 from moving in an inclined state.

In order to assemble the key switch device having the above configuration, each shaft 12A of the link member 7 is connected to the link portion.
After assembling the guide support member 6 by fitting into each shaft hole 20 of the member 8, the other shaft body 12 </ b> B of the link member 7 is connected to the shaft guide groove from above the shaft guide groove 33 </ b> B formed in the guide wall 33. 3
Insert into 3B. Thus, as shown in FIG. 6, Li
Each of the locking pins 15 and 16 of the link member 7 is disposed between a locking guide 26C and a locking piece 26B formed on a locking piece 26A of the locking portion 26 of the holder plate 25, and a link. The locking rod 21 of the member 8 includes a locking guide portion 27C formed on a locking piece 27A of the locking portion 27 and a locking piece 27B.
And placed between. In this state, as shown in FIG.
Thus, both the link member 7 and the link member 8
It is in a flat state.

Subsequently, the key top 1 is disposed on the guide support member 6, and the locking rod 13 of the link member 7 is opposed to the locking guide portion 4A of the locking portion 2 of the key top 1; The locking pins 23 and 24 of the link member 8 are opposed to the locking guide 5A of the locking portion 3 of the key top 1 (see FIG. 6).

Thereafter, when the key top 1 is lightly pressed downward, the locking pins 15, 16 of the link member 7 are snapped into the locking grooves 28 via the resin elasticity of the locking guide portions 26C. The locking rod 21 of the link member 8 is also snapped into the locking groove 29 via the resin elasticity of the locking guide 27C. At the same time, the locking rod 1 of the link member 7
3 is snapped into the locking groove 4 via the locking guide portion 4A, and each locking pin 23, 24 of the link member 8 is snapped.
Is snapped into the locking groove 5 via the locking guide portion 5A. Thereby, the assembly of the key switch device is completed.

As described above, the connection between each of the link members 7, 8 and the holder plate 25 and the key top 1 can be easily performed only by lightly pressing down the key top 1, whereby the key switch device can be connected. The assembly work can be simplified and the work load can be reduced.

As described in detail above, in the key switch device according to the present embodiment, a pair of locking claws 34 vertically extending from both side edges of the key top 1 are formed on the guide wall 33 on the holder plate 25. Since the key top 1 is inserted into the groove 33A, the key top 1 can be prevented from moving in the front-rear and left-right directions even when the key top 1 moves up and down when the key top 1 is operated. Therefore, the key operability of the key top 1 can be significantly improved.

Further, since each shaft body 12B of the link member 7 is inserted into the shaft guide groove 33B formed in the guide wall 33, even if the key top 1 moves up and down when the key top 1 is operated, the key top 1 can be moved. The key top 1 does not move in the front, rear, left, and right directions, so that the key top 1 can be reliably moved up and down while maintaining the horizontal state of the key top 1 in combination with the above effects.

When the key top 1 is not operated, the locking projection 35 of the locking claw 34 is
3C, the key top 1 is guided by the guide wall 33.
The key top 1 can be properly prevented from falling out of the key top 1, and the non-pressed position of the key top 1 can be appropriately regulated in combination with the elastic restoring force of the rubber spring 31.

[0048] Also, the key top 1, since it is moved up and down guided by the guide supporting member 6 made of two link members 7 and the link member 8 which are cross rotatably with each other, the key top when the keytop operating The key top 1 is prevented from moving up and down in an inclined state. As a result, the key operability of the key top 1 can be remarkably improved in combination with the fact that the key top 1 can be prevented from moving in the front, rear, left and right directions as described above. is there.

Further, the rubber spring 31 can be easily and reliably positioned and arranged in the mounting hole H formed in the holder plate 25 on the circuit board 30. The mounting hole H is formed in the holder plate 25. because it is formed at a substantially central position between the respective locking portions 26 and 27, irrespective of the depression position of the key top 1 during the switching operation, the switching operation of the rubber spring 31 through a substantially central portion of the key top 1 Can be performed, and thus a reliable switching operation can always be performed.
The locking portions 2 and 3 of the key top 1 are respectively provided with locking bars 13 of the link member 7 and locking pins 23 and 24 of the link member 8.
Locking grooves 4, 5 and locking guides 4A, 5A opened in the pressing direction of the key top 1 are formed in order to lock the key top 1, and the locking portions 26, 27 of the holder plate 25 are Are locking grooves 28, 29 for slidably locking the locking pins 15, 16 of the link member 7 and the locking bar 21 of the link member 8.
Is formed, the locking pin 15 of the link member 7
16 and the locking rod 21 of the link member 8 are fixed to the locking portions 26 and 27.
In the state of locked to the locking grooves 28 and 29, and the link portion
When both the member 7 and the link member 8 are substantially horizontal and the key top 1 is lightly pressed, the locking rod 13
The locking pins 23 and 24 can be snapped into the locking portions 2 and 3 from the open sides of the locking grooves 4 and 5 via the locking guide portions 4A and 5A of the locking portions 2 and 3, respectively. It becomes possible. Thereby, the link member 7 and the link member 8 are
With the guide support member 6 in the most stable state on the plate 25
The connection work with the key top 1 can be performed, and the assembly work of the key switch device can be easily performed. It should be noted that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the scope of the present invention.

[0050]

As described above, according to the present invention , the first
When the link member and the second link member are substantially horizontal,
First locking member of link member and second locking of second link member
The first locking of the key top via the respective guides
Snaps into the first and second locking
And the second link member are the most stable on the holder member.
When connecting the guide support member and the key top
Bets can be, thereby, it is possible to provide a key switch which can be performed easily assembled to facilitate connection engagement of the key top for draft within the support member.

[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 relationship between a locking claw and a claw guide groove.

6 is an explanatory view showing a state before assembling the key switch.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Key top 2, 3, 26, 27 Locking part 4, 5, 28, 29 Locking groove 6 Guide support member 7, 8 Link member ( hinge member ) 13, 21 Locking bar 15, 16, 23, 24 Stop pin 25 Holder plate 31 Rubber spring 33 Guide wall 33A Claw guide groove 33B Shaft guide groove 33C Closed portion 34 Locking claw 35 Locking projection H Mounting hole

Claims (1)

(57) [Claims] A key top having a first locking portion and a second locking portion formed on a back surface , and a key locking portion below the first locking portion of the key top .
To the fourth locking portion and below the second locking portion of the key top
A holder member which third engaging portion is formed on the first locking member and the third to be engaged with the first locking portion
First link portion having a third engaging member is engaged with the locking portion
Wood and, second re having a fourth engaging member is engaged with the second locking member and said fourth securing portion secured to the second engaging portion
A link member, each other together formed by arranging the movable state, the guide support member for guiding the vertical movement of said key top, in a substantially central position between the third engagement portion and the fourth engagement portion hand,
Line a switching operation in accordance with the vertical movement of the previous Symbol key top
Cormorants and a switching member, wherein the first locking portion and a second locking portion, is open to the pressing direction of the key Toppu, guide portion of the first locking member and the second locking member to the proposal is is formed, the third engagement portion and the fourth engaging portion is slidable for slidably engaging the fourth engagement member of the third engagement member and the second link member of the first link member A third locking member of the first link member and a fourth locking member of the second link member are slidably locked to the respective sliding locking portions. The key top includes a first link member and a second link portion.
The first locking member and the second locking member are snapped into the first locking portion and the second locking portion via the guide portions in a substantially horizontal state, and are attached to the guide support member. Characterized key switch device.