JP2018166041A - Key switch device and keyboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a key switch device capable of improving the operability of an initial operation in a pressing operation. SOLUTION: A key top having an operation surface, a pair of link members for raising and lowering the key top in conjunction with each other, a frame member for rotatably fixing the pair of link members, and a back surface side of the key top are formed. , It has a guide portion into which a sliding portion provided on the link member is slidably fitted, and the guide portion has an upper side portion, a hanging side hanging from the upper side portion, and a key top when the key top is pressed from the hanging side. It has a lower side portion extending in the moving direction of the sliding portion, and the upper side portion is inclined toward the pressing side with respect to a direction orthogonal to the pressing direction. [Selection diagram] FIG. 4

Description

  The present invention relates to a key switch device and a keyboard.

  A key switch device having a gear link structure in which a pair of link members are combined so as to be interlocked with each other is known (see Patent Document 1).

  FIG. 13A is a cross-sectional view of a conventional key switch device 100. FIG. 13B is a partially enlarged view of a part M in FIG. As shown in FIG. 13A, the key switch device 100 includes a key top 101, a link member 102 that supports the key top 101 and moves the key top 101 up and down, a membrane sheet 103, and a support plate 104. And a frame 105 for attaching the link member 102 to the support plate 104.

  Further, a guide portion 110 is provided on the back surface of the key top 101 to slidably engage a sliding portion 120 provided on the link member 102 to guide the lifting and lowering of the link member 102.

JP 2016-35821 A

  As shown in FIGS. 13A and 13B, the guide part 110 includes an upper side part 110a, a vertical side 110b depending from the upper side part 110a, and a horizontal piece 110c extending in a direction orthogonal to the vertical side 110b. And is formed in a U-shape. When the key switch device 100 is not pressed down, the sliding part 120 comes into contact with at least the vertical side 110b and the horizontal piece 110c, and comes into contact with the upper side part 110a when the pressing operation is performed.

  When the key top is pressed, the sliding part 120 moves in the direction of the arrow X1. In the initial operation of the pressing operation, an operating force S transmitted from the key top 101 to the link member 102 and a force J in the moving direction of the link member 102 are applied to the sliding portion 120 and the upper side portion 110a.

  Since the upper side portion 110a and the horizontal piece 110c extend in the horizontal direction, the direction of the operating force S and the direction of the force J acting on the sliding portion 120 and the guide portion 110 when the key top is lowered greatly deviates. End up.

  Therefore, the sliding part 120 cannot move smoothly in the guide part 110, and there is a problem that a feeling of gripping occurs when the key switch device 100 is initially pressed, resulting in poor operability.

  In view of the above problems, the present invention is to provide a key switch device that can improve the operability of the initial operation in the pressing operation.

The present invention includes a key top having an operation surface;
A pair of link members that move the key top up and down in conjunction with each other;
A frame member that rotatably fixes the pair of link members;
A guide portion that is formed on the back side of the key top and in which a sliding portion provided on the link member is slidably fitted;
The guide portion is
An upper side, a lower side that hangs down from the upper side, and a lower side that extends in the moving direction of the sliding portion when the key top is pressed from the lower side, and the upper side is It is inclined to the pressing side with respect to the direction orthogonal to the direction.

  According to the disclosed technology, it is possible to provide a key switch device that can improve the operability of the initial operation in the pressing operation.

1 is an exploded perspective view of a key switch device according to a first embodiment. It is sectional drawing of the key switch apparatus in the II line | wire of FIG. It is a block diagram of the keyboard with which the key switch apparatus of FIG. 1 was mounted | worn. It is an expanded sectional view of the location M of FIG. It is a figure explaining the state of the guide part and sliding part at the time of the pressing operation initial stage of the key switch apparatus concerning 1st Embodiment, and the force which acts. It is the figure explaining the state of the guide part and sliding part in the middle of pressing operation of the key switch apparatus concerning 1st Embodiment, and the force which acts. It is a figure explaining the state of the guide part and sliding part at the time of completion | finish of pressing-down operation of the key switch apparatus which concerns on 1st Embodiment, and a sliding part, and the force which acts. It is the elements on larger scale explaining the key switch device concerning a 2nd embodiment. It is a figure explaining the state of the guide part and sliding part at the time of the pressing operation initial stage of the key switch apparatus concerning 2nd Embodiment, and the force which acts. It is the figure explaining the state of the guide part and sliding part in the middle of pressing operation of the key switch apparatus concerning 2nd Embodiment, and the force which acts. It is a figure explaining the state of the guide part at the time of completion | finish of pressing-down operation of the key switch apparatus which concerns on 2nd Embodiment, and a sliding part, and the force which acts. It is a figure explaining the force which acts on the guide part at the time of the pressing operation initial stage at the time of pressing operation of the edge part of a key top, and an upper side part. It is a figure explaining the conventional key switch apparatus.

  Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and the overlapping description may be abbreviate | omitted.

[First Embodiment]
FIG. 1 is an exploded perspective view of a key switch device 1 according to the first embodiment. FIG. 2 is a cross-sectional view of the key switch device taken along line II in FIG. FIG. 3 is a configuration diagram of a keyboard to which the key switch device of FIG. 1 is attached.

  A key switch device 1 shown in FIG. 1 includes a key top 2 having an operation surface 2a to be pushed down by an operator, and a pair of link members 3 that support the key top 2 and move the key top 2 in the vertical direction in conjunction with each other. And a membrane sheet 4 including two sheet substrates and contacts (not shown) functioning as a switch, a support plate 5, and a frame member 6 for attaching the link member 3 on the support plate 5.

  A keyboard 7 shown in FIG. 3 has a plurality of key switch devices 1 arranged therein. The keyboard 7 has holes 7a corresponding to the keys. In FIG. 3, the hole 7a is indicated by a solid line, and the key top 2 disposed on the hole is indicated by a dotted line. The size of the hole 7a is larger than the size of the key top 2 disposed on the hole.

  The membrane sheet 4 and the support plate 5 are formed as a large membrane sheet and support plate that are common to all the key switch devices 1 of the keyboard 7. The key top 2, the link member 3, and the frame member 6 are provided separately for each key switch device 1.

  As shown in FIG. 2, the key top 2 has an operation surface 2a on the surface side (arrow Y1 side). The operation surface 2a is formed in a shape that curves to the pressing side (arrow Y2 side). A guide portion 21 having an opening on one side is formed on the back surface of the key top 2 to guide a slide portion 31 of a link member 3 to be described later so as to be slidable in the horizontal direction and to be detachably fitted. .

  As will be described later in detail, the guide portion 21 has an upper side portion 21a inclined toward the pressing side toward the central axis K direction.

  The frame member 6 is a substantially rectangular frame-shaped member made of a resin material. The pair of frame portions 6a are formed with bearing portions 6b into which a rotation shaft portion 32 of the link member 3 described later is rotatably fitted. The frame member 6 has a leg portion 6c inserted into the hole 5a of the support plate 5 and a through-hole through which the opening end 4a of the membrane sheet 4 and the dome rubber 4b penetrate when the frame member 6 is attached to the support plate 5. 6d. When the leg portion 6 c is inserted into the hole 5 a, the bottom portion of the frame member 6 except for the leg portion 6 c of the frame member 6 comes into contact with the upper surface of the support plate 5.

  The pair of link members 3 are configured to be paired in the directions of the arrows X1-X2, and have the same shape. The link member 3 is made of resin and is engaged with each other at one end so as to be interlocked. The link member 3 has a configuration of a V-shaped gear link that exhibits a V-shape when viewed from the side when the key top 2 is at the upper and lower positions of elevation. Each link member 3 includes a pair of arm portions 3a extending substantially parallel to each other in the same direction, and a body portion 3b connecting the arm portions 3a.

  The ends of both arm portions 3 a that are separated from the body portion 3 b and the peripheral region thereof are defined as the first end region of the link member 3. Further, the base end of both arm portions 3 a adjacent to the body portion 3 b and its peripheral region are defined as the second end region of the link member 3.

  Protruding rotation shafts 32 are provided to each other in the first end region of each link member 3 and on the inner surface of the arm 3a. Further, a projecting sliding portion 31 is provided in the second end region of each link member 3 and on the outer surface of the arm portion 3a.

  A first tooth portion 3c is provided in the first end region of one arm portion 3a, and a second tooth portion 3d is provided in the first end region of the other arm portion 3a. Each link member 3 is fitted with the membrane sheet 4 and the key top 2 in a state in which the rotation shaft portion 32 is rotatably fitted to the bearing portion 6 b and the sliding portion 31 is slidably fitted to the guide portion 21. It is arranged between. At this time, the first tooth portion 3c of one link member 3 and the second tooth portion 3d of the other link member 3 are engaged with each other. As a result, the pair of link members 3 rotate around the rotation shaft portion 32 in conjunction with each other.

  The membrane sheet 4 has a through hole 4c for fixing the frame member 6 and the link member 3 to the support plate 5, and an open end 4a. A dome rubber 4b that generates a reaction force against the force of pressing the key top 2 is attached to the open end 4a.

  The support plate 5 is formed with four holes 5 a for inserting the leg portions 6 c of the frame member 6 and fixing the frame member 6. The hole 5a is a through hole.

  When assembling the key switch device 1 having the above-described configuration, first, the rotating shaft portion 32 is rotatably fitted into the bearing portion 6b. Then, the leg portion 6 c of the frame member 6 is inserted into the hole 5 a of the support plate 5 through the through hole 4 ca provided in the membrane sheet 4 and caulked. Then, the sliding portion 31 is fitted into the guide portion 21 of the key top 2. Next, a structure in which the key top 2, the membrane sheet 4, the link member 3, and the frame member 6 are mounted on the support plate 5 is fixed to the keyboard 7 shown in FIG. Thereby, the assembly of the key switch device 1 is completed.

(Guide part)
Next, the guide unit 21 according to the present embodiment will be described in detail with reference to FIGS. 4 is an enlarged cross-sectional view of a location M in FIG. 2 and 4 show a state where the key top 2 of the key switch device 1 is not pressed.

  Hereinafter, description will be given by taking the guide portion 21 provided on the left side of FIG. 2 as an example. The guide portion 21 on the right side of the drawing is arranged so as to be symmetric with respect to the central axis K with respect to the guide portion 21 on the left side of the drawing.

  The guide portion 21 includes an upper side portion 21a that forms a part of the back surface of the key top 2, a drooping side 21b that hangs down vertically from one end of the upper side portion 21a, and extends from the drooping side 21b to the arrow X1 side. And a lower side portion 21c.

  By the way, the guide part 110 shown in FIG. 13 is formed in a U shape in which the upper side part 110a and the horizontal piece 110c extend in the horizontal direction orthogonal to the pressing direction. However, in the guide portion 21 of the present embodiment, at least the upper side portion 21a is inclined to the pressing side with respect to the direction line L orthogonal to the pressing direction. Specifically, the upper side portion 21a is gradually inclined toward the pressing side toward the arrow X2 direction or the central axis K direction.

  The inclination angle F1 of the upper side portion 21a of the present embodiment is preferably the same as the inclination angle F2 of the arm portion 3a of the link member 3 in a state where the key top 2 is not pressed. The maximum value of the inclination angle of the upper side portion 21a is less than 30 °, and the minimum value is 25 ° or more.

  The guide portion 21 of the present embodiment is formed in a shape in which the upper side portion 21a and the lower side portion 21c correspond to each other. In the illustrated example, the upper surface portion of the lower side portion 21c is also formed to have the same inclination angle F1 as that of the upper side portion 21a.

  Further, in the guide portion 21 of the present embodiment, a curved portion 21d may be formed between the upper side portion 21a and the lower hanging side 21b.

<Operation>
Next, the operation of the key switch device 1 will be described with reference to FIGS. 5 to 7 also show the operation and the force acting on the guide part 110 and the sliding part 120 of the key switch device 100 shown in FIG. 13 in order to explain the effect of this embodiment.
FIG. 5 is a diagram illustrating the state of the guide portion 21 and the sliding portion 31 at the initial stage of the pressing operation of the key switch device 1 and the acting force. (A) is an overall view of the key switch device, (B) is a partially enlarged view of (A), and (C) is a partially enlarged view of the key switch device 100 of FIG.
FIG. 6 is a diagram illustrating the state of the guide portion 21 and the sliding portion 31 during the pressing operation of the key switch device 1 and the acting force. (A) is an overall view of the key switch device, (B) is a partially enlarged view of (A), and (C) is a partially enlarged view of the key switch device 100 of FIG.
FIG. 7 is a diagram illustrating the state of the guide portion 21 and the sliding portion 31 at the end of the pressing operation of the key switch device 1 and the acting force. (A) is an overall view of the key switch device, (B) is a partially enlarged view of (A), and (C) is a partially enlarged view of the key switch device 100 of FIG.

  Note that the operation of the key switch device 1 described with reference to FIGS. 5 to 7 is performed when the center portion of the operation surface 2a of the key top 2 is pressed.

  At the initial stage immediately after the key switch device 1 is pressed, an operating force transmitted from the key top 2 to the link member 3 is applied to the sliding portion 31 and the upper side portion 21a of the guide portion 21 as shown in FIG. P1 and the force Q1 in the moving direction of the link member 3 (tangential direction of rotation of the link member 3) are acting. In the key switch device of the conventional example, as shown in FIG. 5C, the sliding portion 120 and the upper side portion 110a have an operation force S1 transmitted from the key top 101 to the link member 102 and the moving direction of the link member 102. The force J1 is acting. In the case of the key switch device 100, the direction of the operation force S1 acting on the sliding portion 120 and the upper side portion 110a when the key switch device 100 is lowered is greatly different from the direction of the force J1. This is because the upper side portion 110a and the horizontal piece 110c of the guide portion 110 extend in the horizontal direction orthogonal to the pressing direction as shown in the drawing. If the deviation of the direction of the force is large, a feeling of tension is generated at the initial operation of the pressing operation, and the operability is deteriorated.

  In the guide portion 21 of the present embodiment, since the upper side portion 21a and the lower side portion 21c are gradually inclined toward the pressing side toward the central axis k, the operating force P1 acting on the sliding portion 31 and the upper side portion 21a is reduced. The displacement between the direction and the direction of the force Q1 is considerably smaller than that of the key switch device 100, and the sliding portion 31 can smoothly move in the X1 direction in the guide portion 21 as the link member 3 is lowered. . Therefore, the key switch device 1 according to the present embodiment makes it possible to perform a smooth pressing operation without a sense of tension in the initial operation of the pressing operation.

  During the pressing operation of the key switch device 1, as shown in FIG. 6B, the sliding portion 31 and the upper side portion 21 a have an operating force P 2 transmitted from the key top 2 to the link member 3 and the link member. The force Q2 in the moving direction 3 is acting. As illustrated, the direction of the operating force P2 and the direction of the force Q2 are substantially the same. Therefore, since the sliding part 31 moves smoothly outward (in the direction of the arrow X1), the operability is very good. The operation force S2 and the force J2 in the middle of the pressing operation of the conventional key switch device 100 shown in FIG. 6 (C) are displaced by substantially the same magnitude as the operation force S1 and the force J1 shown in FIG. 5 (C). The sliding part 31 can move smoothly, and there is a risk that a feeling of it will occur.

  When the pressing operation of the key switch device 1 is completed (fully pressed), the operating force P3 and the force in the moving direction of the link member 3 are applied to the sliding portion 31 and the upper side portion 21a as shown in FIG. Q3 is working. As shown in the example, there is a slight deviation between the direction of the operating force P3 and the direction of the force Q3, but since it is after the key top 2 is pressed, there is no problem in operability. The direction of the operating force S3 and the force J3 at the end of the pressing operation of the key switch device 100 shown in FIG. 7C is substantially the same, but since it is after the key top 2 is pressed, there is almost no effect on operability. No.

  As described above, the key switch device 1 of the present embodiment is inclined as the upper side portion 21a of the guide portion 21 moves toward the pressing side. The lower side portion 21c has a shape corresponding to the upper side portion 21a. Therefore, there is almost no deviation between the direction of the operating force (P1 to P3) and the direction of the force (Q1 to Q3) acting on the sliding portion 31 and the upper side portion 21a, and the sliding portion is moved as the link member 3 is lowered. The guide portion 21 can be moved smoothly. Therefore, the key switch device 1 can realize a smooth pressing operation without a feeling of tension in the initial operation of the pressing operation, and ends from the initial pressing operation as described with reference to FIGS. Over time, the sliding portion 31 can be smoothly moved as the link member 3 is lowered, and the operability of the pressing operation can be dramatically improved.

  Furthermore, the keyboard 7 provided with the key switch device 1 of the present embodiment can be expected to have an excellent operability and facilitate keystrokes at high speed.

[Second Embodiment]
The key switch device 1 ′ of the second embodiment will be described with reference to FIG. FIG. 8 shows enlarged portions of the guide portion 21 and the sliding portion 31 of the key switch device 1 ′. The enlarged part is the same as the part M in FIG. FIG. 8 shows a state where the key top 2 is not pressed.

  Hereinafter, differences from the first embodiment will be described, and common items will be omitted. Moreover, the common code | symbol is attached | subjected to the common member.

The key switch device 1 ′ is different from the first embodiment in the shapes of the upper side portion 21a ′ and the lower side portion 21c of the guide portion 21 ′.
That is, the upper side portion 21a ′ of the guide portion 21 ′ is curved toward the pressing side with respect to the direction line L2 orthogonal to the pressing direction. More specifically, the upper side portion 21a ′ is gradually curved toward the pressing side in the direction opposite to the moving direction (arrow X1 direction) of the sliding portion 31 when the key top is pressed.

  Also in the guide part 21 ′ of the present embodiment, the lower side part 21c ′ has the same curvature as the upper side part 21a ′.

  The curved shapes formed in the upper side portion 21a ′ and the lower side portion 21c ′ differ depending on the diameter of the sliding portion 31 and the like, but are not shaped to prevent the sliding portion 31 from being detached from the guide portion 21 ′.

<Operation>
Next, the operation of the key switch device 1 ′ will be described with reference to FIGS. 9 to 11 also illustrate the operation and force acting on the guide portion 110 and the sliding portion 120 of the key switch device shown in FIG. 13 in order to explain the effect of this embodiment.

FIG. 9 is a diagram for explaining the state of the guide portion 21 ′ and the sliding portion 31 at the initial depression of the key switch device 1 ′ and the acting force. (A) is an overall view of the key switch device, (B) is a partially enlarged view of (A), and (C) is a partially enlarged view of the key switch device 100 of FIG.
FIG. 10 is a diagram illustrating the state and the force acting on the guide portion 21 ′ and the sliding portion 31 during the pressing operation of the key switch device 1 ′. (A) is an overall view of the key switch device, (B) is a partially enlarged view of (A), and (C) is a partially enlarged view of the key switch device 100 of FIG.
FIG. 11 is a diagram illustrating the state of the guide portion 21 ′ and the sliding portion 31 at the end of the pressing operation of the key switch device 1 ′ and the acting force. (A) is an overall view of the key switch device, (B) is a partially enlarged view of (A), and (C) is a partially enlarged view of the key switch device 100 of FIG. The operation of the key switch device 1 ′ described with reference to FIGS. 9 to 11 is assumed to be performed by pressing down the central portion of the operation surface 2 a of the key top 2.

  At the initial stage immediately after the key switch device 1 ′ is pressed, an operating force P4 transmitted from the key top 2 to the link member 3 is applied to the sliding portion 31 and the upper side portion 21a ′ as shown in FIG. 9B. The force Q4 in the moving direction of the link member 3 is acting. On the other hand, in the key switch device 100, as shown in FIG. 9C, an operating force S4 transmitted from the key top 101 to the link member 102 and a force in the moving direction of the link member 102 are applied to the sliding portion 120 and the upper side portion 110a. J4 is working. In the case of the key switch device 100, the direction of the operation force S4 acting on the sliding portion 120 and the upper side portion 110a when the key top is lowered is different from the direction of the force J4.

  In the guide part 21 ′ of the key switch device 1 ′, since the upper side part 21a ′ and the lower side part 21c ′ are curved to the pressing side, the direction of the operating force P4 acting on the sliding part 31 and the upper side part 21a ′ Since there is no deviation in the direction of the force Q4 and is substantially the same, the sliding portion 31 can smoothly move in the guide portion 21 ′ as the link member 3 descends. Therefore, the key switch device 1 ′ makes a smooth pressing operation without a feeling of tension during the initial operation of the pressing operation.

  During the pressing operation of the key switch device 1 ′, as shown in FIG. 10B, the sliding portion 31 and the upper side portion 21a ′ are linked to the operating force P5 transmitted from the key top 2 to the link member 3. A force Q5 in the moving direction of the member 3 is acting. As illustrated, the direction of the operating force P5 and the direction of the force Q5 are substantially the same. Therefore, since the sliding part is smoothly moved outward as the key top is lowered, the operability is very good. The operating force S5 and the force J5 in the middle of the pressing operation of the key switch device 100 shown in FIG. 10 (C) are displaced by substantially the same magnitude as the operating force S4 and the force J4 shown in FIG. 9 (C). There is a possibility that the moving part 31 cannot move smoothly and a feeling of crushing or the like may occur.

  When the key switch device 1 ′ is pushed all the way, as shown in FIG. 11 (B), the sliding portion 31 and the upper side portion 21a ′ have the operating force P6 transmitted from the key top 2 to the link member 3 and the movement of the link member 3. Directional force Q6 is acting. As shown in the example, there is no deviation between the direction of the operating force P6 and the direction of the force Q6, which is substantially the same. Note that the directions of the operating force S6 and the force J6 at the end of the pressing operation of the key switch device 100 shown in FIG. 11C are substantially the same, but since the key top 2 has been pressed, the effect on operability is achieved. There is almost no.

  As described above, in the key switch device 1 ′ of the present embodiment, the upper side portion 21a ′ of the guide portion 21 ′ is curved toward the pressing side. Further, the lower side portion 21c ′ of the guide portion 21 ′ has a curved shape corresponding to the upper side portion 21a ′.

  Accordingly, the direction of the operation force (P4 to P6) transmitted from the key top 2 to the link member 3 acting on the sliding portion 31 and the upper side portion 21a ′ from the initial stage to the end of the pressing operation, and the link member 3 The direction of the force (Q4 to Q6) in the moving direction can be made the same, and a smooth pressing operation without a feeling of tension from the initial operation to the end of the pressing operation can be realized. Furthermore, the keyboard 7 provided with the key switch device 1 ′ of the present embodiment can be expected to have an excellent operability and facilitate the keystroke at high speed.

  The operation of the key switch device 1, 1 ′ described with reference to FIGS. 1 to 11 is an example when the center portion of the operation surface 2 a of the key top 2 is pressed.

  In FIG. 12, in the key switch devices 1, 1 ′ (and 100) according to the first and second embodiments, the sliding at the initial stage of the pressing operation when the end portion of the operation surface 2 a of the key top 2 is pressed. The operation force acting on the moving part and the upper side part and the force in the moving direction of the link member are shown. (A) is an overall view of the key switch device 1, 1 ′, (B) is a partially enlarged view of a conventional guide part 110, (C) is a partially enlarged view of the guide part 21 of the first embodiment, (D). These show the elements on larger scale of guide part 21 'of a 2nd embodiment.

  The key switch device 100 shown in FIG. 12B has a direction of the operating force S7 transmitted from the key top 101 acting on the sliding portion 120 and the upper side portion 110a to the link member 102, and a force J7 in the moving direction of the link member 102. Is larger than the operating force S1 and the force J1 shown in FIG. 5C and the operating force S4 and the force J4 shown in FIG. 9C. Therefore, the feeling of gripping at the initial stage of the pressing operation is increased.

  In the key switch device 1 of the first embodiment shown in FIG. 12C, the direction of the operating force P7 transmitted from the key top 2 acting on the sliding portion 31 and the upper side portion 21a to the link member 3, and the link member 3 The shift of the direction of the force Q7 in the moving direction is substantially the same as the operating force P1 and the force Q1 shown in FIG. 5B, and the operability is almost the same as when the center portion is pressed.

  The key switch device 1 ′ of the second embodiment shown in FIG. 12D includes the direction of the operating force P 8 transmitted from the key top 2 acting on the upper side 21 a ′ of the sliding portion 31 to the link member 3, and the link member. 3 is substantially the same as the operating force P4 and the force Q4 shown in FIG. 9B, and the operability is almost the same as when the center portion is pressed.

  That is, the key switch device 1, 1 ′ according to the present embodiment can be smoothly pressed without any feeling of tension from the initial operation to the end of the pressing operation, regardless of the position on the operation surface 2 a of the key top 2. Operation can be realized.

  The preferred embodiment has been described in detail above. However, the present invention is not limited to the above-described embodiment, and various modifications and replacements are made to the above-described embodiment without departing from the scope described in the claims. Can be added.

DESCRIPTION OF SYMBOLS 1 Key switch apparatus 2 Key top 21 Guide part 21a Upper side part 21b Lower side part 21c Lower side part 3 Link member 5 Support plate 6 Frame member 7 Keyboard

Claims (4)

A key top having an operation surface;
A pair of link members that move the key top up and down in conjunction with each other;
A frame member that rotatably fixes the pair of link members;
A guide portion that is formed on the back side of the key top and in which a sliding portion provided on the link member is slidably fitted;
The guide portion is
An upper side, a lower side that hangs down from the upper side, and a lower side that extends in the moving direction of the sliding portion when the key top is pressed from the lower side, and the upper side is A key switch device, wherein the key switch device is inclined toward the pressing side with respect to a direction orthogonal to the direction. A key top having an operation surface;
A pair of link members that move the key top up and down in conjunction with each other;
A frame member that rotatably fixes the pair of link members;
A guide portion that is formed on the back side of the key top and in which a sliding portion provided on the link member is slidably fitted;
The guide portion is
An upper side part, a lower side part that hangs down in the pressing direction from the upper side part, and a lower side part that extends in the moving direction of the sliding part when the key top is pressed down from the lower side part, and the upper side part Is a key switch device that is curved toward the pressing side with respect to a direction orthogonal to the pressing direction. The inclination angle of the upper side is
2. The key switch device according to claim 1, wherein the key switch device has the same inclination angle of the arm portion of the link member in a state where the key top is not pressed.   A keyboard comprising a plurality of key switch devices according to any one of claims 1 to 3.

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