JP2018170133A - Key switch device and keyboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a key switch device and a keyboard, in which a gap between a key top and a through hole of a case can be reduced by preventing interference between the key top and the through hole of the case.SOLUTION: Even if the center of a through hole 81 of a case 80 and the center of a key top 60 are offset from each other, a mounting plate 20 to which the key top 60, a housing 50 and a link member 40 are mounted can be moved back and forth and left and right with respect to a membrane sheet 30 and a support plate 10, until a projection 82 of the case 80 is fitted into a through hole 22 of the mounting plate 20.SELECTED DRAWING: Figure 2

Description

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

  Conventionally, a keyboard having an isolation structure in which a part of a case is disposed between key tops is known (see, for example, Patent Document 1). Further, a keyboard is known in which a keyboard body is fixed between an upper case and a lower case by screwing from the lower side of the lower case (see, for example, Patent Document 2).

  FIG. 1 is an exploded view of a conventional keyboard. The keyboard 1 shown in FIG. 1 includes a support plate 2, a membrane sheet 3, a key top unit 4, a frame 5, and a case 6. The key top unit 4 includes a housing and a link member (not shown) in addition to the key top 4a. The support plate 2 includes a through hole 2a for caulking and fixing the key top unit 4, a through hole 2b for caulking and fixing the protrusion 5c of the frame 5, and a through hole 2c for fitting the protrusion extending from the back side of the case 6. And.

  The membrane sheet 3 includes a through hole 3a through which the housing and link member of the key top unit 4 pass, a through hole 3b through which the protrusion 5c passes, and a through hole 3c through which the protrusion on the back side of the case 6 passes. The frame 5 includes a through hole 5a through which the key top 4a passes, a through hole 5b through which the protrusion of the case 6 passes, and a protrusion 5c. The case 6 includes a through hole 6a through which the key top 4a passes and a projection (not shown). The key top unit 4 is caulked and fixed to the through hole 2a with the membrane sheet 3 interposed therebetween. The protrusion 5c is caulked and fixed to the through hole 2b through the through hole 3b. The protrusion on the back side of the case 6 is fitted to the through hole 2c through the through hole 5b and the through hole 3c. In order to prevent interference between the through hole 6a and the key top 4a, a gap is formed between the through hole 6a and the key top 4a.

JP 2014-235663 A JP 2000-112629 A

  By the way, in the keyboard 1 of FIG. 1, if the center of the through hole 6a of the case 6 and the center of the key top 4a shift, the key top 4a may interfere with the through hole 6a, and the key top 4a may not operate. Further, in order to prevent interference between the key top 4a and the through hole 6a, it is necessary to form a gap between the through hole 6a and the key top 4a. However, if the gap is increased, a foreign substance enters the keyboard.

  An object of the present invention is to provide a key switch device and a keyboard that can prevent interference between the key top and the through hole of the case and reduce a gap between the key top and the through hole of the case.

  In order to achieve the above object, a key switch device disclosed in the specification includes a key top, a case having a first through hole through which the key top passes and a first protrusion extending downward, and the key top passes therethrough. A second through hole, a third through hole through which the first protrusion penetrates, and a second protrusion extending downward, and a frame disposed under the case and slidable or pivotable on the key top A pair of link members having a first attached portion that can be attached and a second attached portion that is attached to the mounting plate so as to be rotatable or slidable, and that moves the key top up and down in conjunction with each other; A membrane sheet having a fourth through hole through which the first protrusion penetrates, a fifth through hole through which the second protrusion penetrates, and an opening for receiving the pair of link members, and a support plate for fixing the second protrusion And the second cover A mounting plate that has a mounting portion that rotatably or slidably attaches the attachment portion and a sixth through-hole into which the first protrusion is fitted, and is disposed between the membrane sheet and the support plate; The mounting plate is movable with respect to the membrane sheet and the support plate until the first protrusion is fitted into the sixth through hole.

  According to the present invention, interference between the key top and the through hole of the case can be prevented, and the gap between the key top and the through hole of the case can be reduced.

It is an exploded view of the conventional keyboard. It is a disassembled perspective view of the keyboard which concerns on this Embodiment. (A) is a figure which shows the back surface of a case. (B) is a figure which shows the back surface of a flame | frame. (C) is a figure which shows the state which the protrusion of a case fits in the hole of a mounting board. It is sectional drawing of a keyboard. It is a figure which shows the manufacturing process of a keyboard. It is a figure which shows the manufacturing process of a keyboard. It is a disassembled perspective view of the keyboard which concerns on the modification of this Embodiment. It is a figure which shows the 1st modification of a key switch apparatus. It is a figure which shows the 2nd modification of a key switch apparatus. It is a figure which shows the 3rd modification of a key switch apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 2 is an exploded perspective view of the keyboard according to the present embodiment. 3A is a view showing the back surface of the case, FIG. 3B is a view showing the back surface of the frame, and FIG. 3C is a state in which the protrusion of the case is fitted into the hole of the mounting plate. FIG. FIG. 4 is a cross-sectional view of the keyboard.

  2 includes a support plate 10, a plurality of mounting plates 20, a membrane sheet 30, a plurality of link members 40, a plurality of housings 50, a plurality of key tops 60, a frame 70, and a case 80. Yes. In the present embodiment, the support plate 10, the mounting plate 20, the membrane sheet 30, the link member 40, the housing 50, the key top 60, the frame 70, and the case 80 corresponding to one key constitute a key switch device. The keyboard 100 includes a plurality of key switch devices.

  The case 80 includes a through hole 81 (first through hole) through which the key top 60 passes. Further, as shown in FIG. 3A, a protrusion 82 (first protrusion) that fits into the through hole 22 of the mounting board 20 is formed on the back surface of the case 80 as shown in FIG. 3C. ing.

  Returning to FIG. 2, the frame 70 includes a through hole 71 (second through hole) through which the key top 60 passes. The area of the through hole 71 is larger than the area of the through hole 81. A through hole 72 (third through hole) through which the protrusion 82 passes is formed at both left and right ends of the through hole 71. Further, as shown in FIG. 3B, a protrusion 73 (second protrusion) that is caulked and fixed to the support plate 10 is formed on the back surface of the frame 70.

  The housing 50 includes a wall portion 51 that is a frame of the housing, a receiving portion 52 that rotatably receives the rotation shaft portion 41e of the link member 40, a leg portion 53 that is caulked and fixed to the through hole 21 of the mounting plate 20, And a through hole 54 through which the rubber actuator 31 is exposed when the housing 50 is attached to the mounting board 20.

  The pair of link members 40 includes link members 40a and 40b made of resin. The link members 40a and 40b are engaged with each other at one end. When the key top 60 is at the upper limit position of the raising / lowering operation, the link members 40a and 40b have a V-shaped link structure that exhibits a V-shape when viewed from the side.

  The link member 40a includes a pair of arm portions 41a that extend in substantially the same direction in the same direction, and a body portion 41b that connects the arm portions 41a. On the outer surface of the arm portion 41a to which the body portion 41b is connected, a protrusion 41c (first attached portion) that is slidably mounted on the back surface of the key top 60 is formed. In addition, a rotation shaft portion 41e (second attached portion) that is received by the receiving portion 52 is provided on the inner side surface of the arm portion 41a. Each arm portion 41a is integrally formed with the body portion 41b, and a bifurcated portion 41d that meshes with the claw portion 41f of the link member 40b is formed at the other end of each arm portion 41a. Similar to the link member 40a, the link member 40b includes a pair of arm portions 41a, a trunk portion 41b, a protrusion 41c, and a rotation shaft portion 41e. Each arm portion 41a of the link member 40b includes a claw portion 41f that meshes with the forked portion 41d.

  The membrane sheet 30 includes a rubber actuator 31 disposed on a switch (not shown), an arm portion 41a of the link members 40a and 40b, an opening portion 32 for receiving the wall portion 51 and the leg portion 53 of the housing 50, and a case 80. A through hole 33 (fourth through hole) through which the protrusion 82 penetrates and a through hole 34 (fifth through hole) through which the protrusion 73 of the frame 70 penetrates are provided.

  In the state where the link member 40 is disposed in the opening 32, a gap of about 2 to 3 mm is formed between the link member 40 and the outer edge of the opening 32 on the front, rear, left and right. As a result, the link member 40 fixed to the mounting board 20 by the housing 50 can move about a few millimeters forward, backward, left and right within the opening 32. The area of the through hole 33 is substantially the same as the horizontal sectional area of the protrusion 82. The area of the through hole 34 is larger than the horizontal sectional area of the protrusion 73.

  The plurality of mounting boards 20 are separated so that they can move about a few millimeters forward, backward, left and right respectively. Each mounting board 20 includes a through hole 21 (attachment portion) in which the leg portion 53 of the housing 50 is caulked and fixed, and a through hole 22 (sixth through hole) that fits the protrusion 82 of the case 80. The area of the through hole 21 is substantially the same as the horizontal sectional area of the leg 53, and the area of the through hole 22 is substantially the same as the horizontal sectional area of the protrusion 82.

  The support plate 10 includes a through hole 11 that accommodates the caulked leg portion 53, a through hole 12 that accommodates the protrusion 82, and a through hole 13 in which the protrusion 73 is caulked and fixed. The through hole 11 only accommodates the caulked leg portion 53, and the leg portion 53 is not fixed to the through hole 11. The area of the through hole 11 is larger than the horizontal cross-sectional area of the leg portion 53, and the leg portion 53 can move back and forth and right and left in the through hole 11. The through hole 12 only accommodates the protrusion 82, and the protrusion 82 is not fixed to the through hole 12. The area of the through hole 12 is larger than the horizontal sectional area of the protrusion 82.

  In the keyboard 100, the protrusion 73 is inserted into the through hole 13 of the support plate 10 through the through hole 34 and fixed by caulking. Since the link member 40 fixed to each mounting board 20 can move about 2 to 3 mm back and forth and left and right within the opening 32, each mounting board 20 to which the key top 60, the housing 50 and the link member 40 are fixed is Until the protrusions 82 of the case 80 are fitted into the through holes 22, they can move about two to three millimeters forward, backward, left and right with respect to the membrane sheet 30 and the support plate 10. Then, the protrusions 82 are fitted into the through holes 22 of the respective mounting boards 20, and the mounting boards 20 are positioned.

  Therefore, even when the center of the through hole 81 of the case 80 and the center of the key top 60 are shifted from each other, the mounting plates 20 to which the key top 60, the housing 50, and the link member 40 are fixed can be moved. Interference between the key top 60 and the through hole 81 can be prevented, and the gap between the key top 60 and the through hole 81 can be reduced.

  5 and 6 are diagrams showing a manufacturing process of the keyboard 100. FIG.

  In FIG. 5, first, the link member 40 is attached to the housing 50 (S1). At this time, the rotation shaft portion 41 e of the link member 40 is fitted into the receiving portion 52 of the housing 50. Next, the housing 50 to which the link member 40 is attached is attached to the membrane sheet 30 so that the rubber actuator 31 is exposed from the through hole 54 (S2). In FIG. 5, since the membrane sheet 30 is turned over, the rubber actuator 31 is hidden by the membrane sheet 30.

  Next, the through hole 21 of the mounting plate 20 is inserted into the leg portion 53 of the housing 50 protruding from the membrane sheet 30 (S3), and the leg portion 53 protruding from the through hole 21 is caulked (S4). Thereby, although the link member 40 and the housing 50 are fixed to the mounting board 20 via the membrane sheet 30, the mounting board 20 is not fixed to the membrane sheet 30.

  Next, the membrane sheet 30 to which the link member 40, the housing 50, and the mounting plate 20 are attached is attached to the frame 70 (S5). At this time, the protrusion 73 of the frame 70 is inserted into the through hole 34 of the membrane sheet 30. Next, the support plate 10 is attached on the frame 70 so as to sandwich the membrane sheet 30 and the mounting plate 20 (S6). At this time, the protrusion 73 is inserted into the through hole 13 of the support plate 10. Next, the protrusion 73 protruding from the through hole 13 is caulked (S7). Accordingly, the frame 70 is fixed to the support plate 10, and the membrane sheet 30 and the mounting plate 20 are disposed between the frame 70 and the support plate 10.

  Then, the frame 70 to which the support plate 10 is fixed is turned over, and the key top 60 is attached to the link member 40 with the link member 40, the housing 50 and the rubber actuator 31 exposed from the through hole 71 (S8). Specifically, the protrusion 41 c of the link member 40 is slidably attached to the back side of the key top 60. In the state of S8, the mounting plate 20 to which the link member 40, the housing 50, and the key top 60 are attached can move about a few millimeters forward, backward, left and right with respect to the membrane sheet 30 and the support plate 10. The position of 20 can be adjusted.

  Finally, the case 80 is attached to the mounting board 20 with the frame 70 and the membrane sheet 30 interposed therebetween (S9). The protrusion 82 of the case 80 passes through the through hole 72 of the frame 70 and the through hole 33 of the membrane sheet 30 and fits into the through hole 22 of the mounting board 20. The protrusion 82 reaches the through hole 12 of the support plate 10 but is not fixed to the through hole 12.

  FIG. 7 is an exploded perspective view of a keyboard according to a modification of the present embodiment. The description of the same configuration as the keyboard 100 in FIG. 2 is omitted.

  The keyboard 100 in FIG. 2 includes one mounting plate 20 for each key switch device or each key top, but the keyboard 100A in FIG. 7 has one keyboard switch device or a plurality of key tops. Two mounting boards 200 are provided. The mounting boards 200 are separated from each other.

  On the back surface of the case 80, a protrusion 82 </ b> A that fits into the through hole 22 </ b> A of the mounting board 200 is formed. The protrusion 82A is different from the protrusion 82 in FIG. 3A in terms of the number, size, and position on the case 80, but the function of fitting into the through hole of the mounting board is the same as the protrusion 82.

  The frame 70 has a through hole 72A through which the protrusion 82A passes. The through hole 72A differs from the through hole 72 in FIG. 2 in terms of the number, size, and position on the frame 70, but the function of the protrusion of the case 80 is the same as the through hole 72.

  The membrane sheet 30 includes a through hole 33A through which the protrusion 82A passes. The area of the through hole 33A is substantially the same as the horizontal sectional area of the protrusion 82A. The through hole 33A differs from the through hole 33 in FIG. 2 in terms of the number, size, and position on the membrane sheet 30, but the function of the protrusion of the case 80 is the same as the through hole 33.

  The mounting board 200 includes a through hole 22A into which the protrusion 82A is fitted. The area of the through hole 22A is substantially the same as the horizontal sectional area of the protrusion 82A. The through hole 22A differs from the through hole 22 in FIG. 2 in terms of the number, size, and position on the mounting board, but the function of fitting the projection of the case 80 is the same as the through hole 22.

  The support plate 10 includes a through hole 12A that accommodates the protrusion 82A. The through hole 12A only accommodates the protrusion 82A, and the protrusion 82A is not fixed to the through hole 12A. The area of the through hole 12A is larger than the horizontal sectional area of the protrusion 82A. The through hole 12A is different from the through hole 12 of FIG. 2 in terms of the number, size, and position on the support plate 10, but the function of accommodating the protrusion of the case 80 is the same as the through hole 12.

  Since the link member 40 fixed to the mounting plate 200 can move about a few millimeters forward, backward, left and right within the opening 32 of the membrane sheet 30, the key top 60, the housing 50 and the link member 40 are fixed. The plate 200 can move about a few millimeters forward, backward, left and right with respect to the membrane sheet 30 and the support plate 10 in the same manner as the mounting plate 20 until the protrusion 82A is fitted into the through hole 22A. Then, the protrusion 82A is fitted into the through hole 22A, and the mounting board 200 is positioned.

  Therefore, even when the center of the through hole 81 and the center of the key top 60 are deviated, the interference between the key top 60 and the through hole 81 can be prevented by moving the mounting board 200. A gap with 81 can be reduced.

  FIG. 8 is a diagram illustrating a first modification of the key switch device. In FIG. 8, the support plate 10, the frame 70, and the case 80 are omitted. 8 shows a part of the membrane sheet 30, the membrane sheet 30 in FIG. 8 is the same as the membrane sheet 30 in FIG.

  The link member 42 in FIG. 8 has a so-called V-shaped link structure, similarly to the link member 40 in FIG. 2, and is fixed to the mounting board 20 without using the housing 50. The pair of link members 42 engage with each other at one end. The link member 42 includes a pair of arm portions 42a that extend in the same direction and a body portion 42b that connects the arm portions 42a. A protrusion 42c (second attached portion) that is rotatably attached to the attachment portion 23 of the mounting plate 20 is formed on the outer surface of the pair of arm portions 42a on the distal end side (the side where the link members 42 mesh with each other). Yes. A protrusion 42d (first attached portion) that is slidably mounted on the back surface of the key top 60 is formed on the outer surface on the rear end side of the arm portion 42a.

  A mounting portion 23 to which the protrusion 42c is attached is formed on the mounting board 20. The mounting portion 23 is formed with a hole 23a for inserting the protrusion 42c. Further, in the vicinity of the attachment portion 23, a hole 23b into which a part of the link member 42 enters when the link member 42 is rotated is formed. The link member 42 rotates with the protrusion 42c inserted into the hole 23a as a fulcrum.

  The attachment portion 23 and the arm portion 42 a are accommodated in the opening portion 32 of the membrane sheet 30, and the link member 42 attached to the attachment portion 23 can move about a few millimeters forward, backward, left and right within the opening portion 32. Therefore, the mounting plate 20 can move about a few millimeters forward, backward, left and right with respect to the membrane sheet 30 and the support plate 10 until the protrusion 82 is fitted in the through hole 22. In FIG. 8, the mounting portion 23 is formed on the mounting board 20, but the mounting portion 23 may be formed on the mounting board 200 of FIG. 7.

  FIG. 9 is a diagram illustrating a second modification of the key switch device. In FIG. 9, the support plate 10, the frame 70, and the case 80 are omitted. 9 shows a part of the membrane sheet 30, the membrane sheet 30 in FIG. 9 is the same as the membrane sheet 30 in FIG.

  The link member 43 of FIG. 9 has a so-called inverted V-shaped link structure, and is rotatably fixed to the mounting board 20 without using the housing 50. The pair of link members 43 are engaged with each other at one end. Each link member 43 includes a pair of arm portions 43a extending in the same direction and a body portion 43b that connects the arm portions 43a. A protrusion 43c (second attached portion) that is slidably attached to the attachment portion 24 is formed on the outer surface on the distal end side of the arm portion 43a, and a key is provided on the outer surface on the rear end side of the arm portion 43a. A protrusion 43d (first attached portion) that is rotatably mounted on the back surface of the top 60 is formed.

  A mounting portion 24 for attaching the protrusion 43c is formed on the mounting board 20. The mounting portion 24 is formed with a through hole 24a into which the protrusion 43c is inserted and slid back and forth. The link member 43 rotates with a protrusion 43d mounted on the back surface of the key top 60 as a fulcrum.

  The attachment portion 24 and the arm portion 43a are accommodated in the opening portion 32 of the membrane sheet 30, and the link member 43 attached to the attachment portion 24 is movable about a few millimeters forward, backward, left and right within the opening portion 32. Accordingly, the mounting plate 20 on which the key top 60 and the link member 43 are mounted moves about a few millimeters forward, backward, left and right with respect to the membrane sheet 30 and the support plate 10 until the protrusion 82 is fitted into the through hole 22. Is possible.

  FIG. 10 is a diagram illustrating a third modification of the key switch device. In FIG. 10, the support plate 10, the frame 70, and the case 80 are omitted. 10 shows a part of the membrane sheet 30, the membrane sheet 30 in FIG. 10 is the same as the membrane sheet 30 in FIG.

  The link member 44 in FIG. 10 has a so-called X-shaped link structure, and is fixed to the mounting plate 20 so as to be rotatable without using the housing 50. The link members 44 are fixed to each other so as to be rotatable at a fulcrum 44a. Each link member 44 includes a pair of arm portions 44b extending in the same direction, a first body portion 44c that connects the arm portions 44b, and a second body portion 44d that connects the other ends of the arm portions 44b. . A protrusion 44e (first attached portion) that is rotatably attached to the back surface of the key top 60 is formed on the outer surface on one end side of the arm portion 44b. A projection 44f (second attached portion) that is slidably attached to the attachment portion 24 of the mounting board 20 is formed on the outer surface on the other end side of the arm portion 44a.

  A mounting portion 24 for attaching the protrusion 44f is formed on the mounting board 20. The attachment portion 24 is formed with a through hole 24a into which the protrusion 44f is inserted and slid back and forth. The attachment portion 24 and the arm portion 44 b are accommodated in the opening portion 32 of the membrane sheet 30, and the link member 44 attached to the attachment portion 24 can move about a few millimeters forward, backward, left and right within the opening portion 32. Therefore, the mounting plate 20 can move about a few millimeters forward, backward, left and right with respect to the membrane sheet 30 and the support plate 10 until the protrusion 82 is fitted in the through hole 22.

  9 and 10, the mounting portion 24 is formed on the mounting board 20, but the mounting portion 24 may be formed on the mounting board 200 of FIG. 7. Moreover, when the mounting board 20 of FIGS. 8-10 is utilized, the support plate 10 does not need to be provided with the through-hole 11.

  As described above, according to the present embodiment, the key top 60 and the link member 40 (41-43) are mounted until the protrusion 82 of the case 80 is fitted into the through hole 22 of the mounting board 20. Since the mounting plate 20 can move back and forth and right and left with respect to the membrane sheet 30 and the support plate 10, it is possible to prevent interference between the key top 60 and the case 80 by adjusting the position of the mounting plate 20. The gap between 60 and the through hole 81 can be reduced.

  The present invention is not limited to the above-described embodiment, and can be implemented with various modifications within a range not departing from the gist thereof.

DESCRIPTION OF SYMBOLS 10 Support plate 20 Mounting plate 30 Membrane sheet 40 Link member 50 Housing 60 Key top 70 Frame 80 Case 100 Keyboard

Claims (3)

Key tops,
A case having a first through hole through which the key top passes and a first protrusion extending downward;
A second through hole through which the key top penetrates, a third through hole through which the first projection penetrates, and a second projection extending downward, and a frame disposed under the case;
A first attached portion that is slidably or pivotably attached to the key top; and a second attached portion that is pivotally or slidably attached to the mounting plate. A pair of link members for raising and lowering the key top;
A membrane sheet having a fourth through hole through which the first protrusion penetrates, a fifth through hole through which the second protrusion penetrates, and an opening for receiving the pair of link members;
A support plate for fixing the second protrusion;
A mounting portion for rotatably or slidably mounting the second mounted portion and a sixth through hole into which the first protrusion is fitted, and is disposed between the membrane sheet and the support plate. Mounting board,
The key switch device, wherein the mounting plate is movable with respect to the membrane sheet and the support plate until the first protrusion is fitted into the sixth through hole.   The key switch device according to claim 1, wherein one mounting plate is provided for each of a plurality of key tops.   A keyboard comprising a plurality of key switch devices according to claim 1 or 2.

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