JPH0720615U - Keyboard structure - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Even if the number of fixing screws for fixing the holding plate is reduced by half compared to the conventional product, information processing device that can prevent the downward bending of the holding plate as much as possible Keyboard structure. [Structure] Holding plate 1 formed in a curved shape excluding both ends
0, a tact switch 3 having a key 4 attached to the upper end thereof is disposed, and inside the periphery of a rectangular display plate 8 whose bottom is opened,
The holding plate 10 is clamped in a front portion of the retaining plate 10 which is set to be slightly shorter than the overall length of the retaining plate 10, and the retaining plate 10 is screwed to a boss 6 that hangs from the lower portion of the top surface of the display plate 8. The key 4 is projected from the hole 5 provided on the top surface of the display plate 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of a keyboard used in a word processor, personal computer, etc.

[0002]

[Prior art]

 As shown in the perspective view of the main part of FIG. 3 and the cross-sectional view of the main part of FIG. 4, a keyboard used in a conventional word processor, personal computer, or the like has an upper part of the tact switch 3 arranged on the holding plate 2. The key 4 is attached to the boss 6, and the holding plate 2 is screwed by the screw 7 to the boss 6 that hangs down on the lower part of the upper surface of the display plate 1 having the holes 5 according to the arrangement of the key 4 and the key 4 is attached. The structure is such that it protrudes from the hole 5 of the display plate 1, and when the key 4 is pressed, the tact switch 3 operates to operate as an information processing device. However, if the holding plate 2 is bent in the downward direction shown by the arrow in FIG. 4, the stroke of the tact switch 3 is changed even if the key 4 is pressed, and electrical contact failure is likely to occur. In order to prevent this, a large number of screws for screwing the holding plate 2 to the display plate 1 are used so that the downward bending of the holding plate 2 does not occur. For this reason, the number of man-hours required for assembling the keyboard is large, and it takes time to remove and install screws for maintenance work, which is an obstacle to reducing the product cost.

[0003]

[Problems to be solved by the device]

 The present invention has been made in view of such a point. Even if the number of screws for screwing the holding plate is reduced by half compared with the conventional one, the downward bending of the holding plate is prevented and the tact switch It is intended to provide a holding plate mounting structure for a keyboard capable of measuring electrical contact stability.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention forms the central portion of the holding plate in a curved shape in the mounting direction, and sets the entire length of the holding plate to be slightly longer than the mounting size of the locking portion of the housing. However, the holding plate insertion side of the housing is tapered.

[0005]

[Action]

 With the above configuration, in the keyboard holding plate mounting structure of the present invention, even if the number of screws for screwing the holding plate to the housing is reduced by half compared with the conventional case, the holding plate Deflection that occurs on the outside can be prevented as much as possible, so that the electrical contact of the tact switch can be kept stable.

[0006]

【Example】

 Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. FIG. 1 is an assembled sectional view of a keyboard structure according to the present invention, and FIG. 2 is an exploded sectional view thereof. The housing 8 is a rectangular housing formed of resin and having an open bottom. A large number of holes 5 are provided on the upper surface of the housing 8, and a boss 6 having screw insertion holes 6a is provided at various places on the lower portion of the upper surface, avoiding the holes 5. The inside of the peripheral portion has a stepped structure, and a step portion 9a is provided, and a taper portion 9 is formed below the step portion 9a. The holding plate 10 is a flat plate having a curved central portion, and its overall length dimension is set slightly longer than the front dimension of the stepped portion 9a of the housing 8. A large number of tact switches 3 each having a key 4 attached to the upper end thereof are arranged on the holding plate 10, and screw insertion holes 10b are provided around the same at the same position as the boss 6 of the housing 8. There is. When the holding plate 10 is inserted from the lower side of the housing and hooked on the stepped portion 9a, and the screw 7 is inserted into the hole 10b, it is tightened in the hole 6a of the boss 6. The key 4 projects from the hole 5 of the housing 8.

Next, the operation of the holding plate 10 when the keyboard is assembled in the above configuration will be described. The tact switch 3 is arranged on the upper surface, and the key 4 is attached to the upper end of the tact switch 3, and then the holding plate 10 is inserted from below the housing 8. After both ends of the holding plate 10 are inserted into the tapered portion 9, the screw 7 is inserted into the hole 10b of the holding plate 10, and the screw 7 is further tightened into the hole 6a of the boss 6 of the display plate 8. Then, the holding plate 10 is also inserted into the housing 8 at the same time, and both end portions 12 of the holding plate 10 receive a compressive force in the lateral direction due to the taper portions 9 being squeezed. Since the holding plate 10 already has a curved shape formed in the top surface direction, the holding plate 10 receives a force that causes a bending in the top surface direction of the housing 8 due to the lateral compression force. . When the holding plate 10 is completely fixed by the screw 7, the holding plate 10 is set to be slightly longer than the front dimension of the hooking portion 9a of the housing 8 so that the holding plate 10 is completely fixed. 10 is always in a state of receiving a bending force toward the upper surface.

With the structure in which the holding plate 10 is constantly screwed to the housing 8 while receiving a working force that causes the holding plate 10 to bend toward the upper surface at all times, the set screw 7 for fixing the holding plate 10 is Even if it is halved compared to the keyboard product, the structure according to the present invention can prevent the holding plate 10 from being bent in the lower surface direction, thereby maintaining the electrical contact stability of the tact switch 3. Will be possible.

[0009]

[Effect of device]

 As described above, in the keyboard structure according to the present invention, the set screw for fixing the holding plate can be halved in comparison with the conventional product, so that the structure of the keyboard product itself can be simplified. In addition to being able to measure, the man-hours required for assembly in the production process can be reduced, the cost can be reduced by both, and the man-hours required during maintenance can be reduced to improve maintainability.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of a keyboard structure according to the present invention.

FIG. 2 is an exploded cross-sectional view of essential parts of an embodiment of a keyboard structure according to the present invention.

FIG. 3 is an external view of a keyboard.

FIG. 4 is a sectional view of a main part of a conventional keyboard structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 case 2 holding plate 3 tact switch 4 key 5 case upper surface hole 6 holding plate fixing boss 6a set screw insertion hole 7 set screw 8 case according to the present invention 9 taper part 9a case latch 10 holding according to the present invention Plate 10a Curved portion 10b Screw insertion hole

Claims (2)

[Scope of utility model registration request] 1. A plurality of downwardly extending bosses are provided on the inside of the upper surface of a housing having a large number of holes on the upper surface and an opening on the lower surface, and a large number of tact switches equipped with keys are arranged on the upper surface. A flat plate-shaped holding plate provided with a screw hole at a position facing the boss of the housing is locked to a stepped locking portion provided inside the side surface of the housing, and the key is provided on the upper surface of the housing. In a keyboard structure in which the holding plate is screwed to a boss of the housing so as to project from the hole, the central portion of the holding plate is formed in a curved shape in the mounting direction, and the total length of the holding plate is A keyboard structure characterized in that it is set to be slightly longer than the attachment size of the hook portion of the housing, and that the holding plate insertion side of the housing is tapered. 2. The height of the boss hanging from the inside of the upper surface of the casing from the lower portion of the upper surface is set to be slightly lower than the height from the lower portion of the upper surface of the engaging portion, and the flat holding plate is provided with the boss. The keyboard structure according to claim 1, wherein the holding plate is fixed in a state of being curved in a top surface direction of the housing by being screwed to the.