JPH0332016Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a keyboard switch that is used as an input device for computers, various electronic devices, etc., and has key tops with a relatively large pressing surface.

[Prior Art] In FIGS. 4 and 5, if the key top 1 has a pressing surface several times wider than the key switch 2, such as the space key or shift key of a personal computer or electric typewriter, the key top 1
It is necessary for the key top 1 to move up and down reliably and the key switch 2 to open and close even if the corner of the keypad (indicated by the arrow in the figure) is pressed. For that purpose, the interlocking rod 3
is formed into a crank shape by a straight part 4, arm parts 5, 5 whose both ends are bent at a right angle, and guide ends 6, 6 whose tips are further bent outward at a right angle. It is formed by bending. The linear portion 4 of the interlocking rod 3 is connected to the engaging members 7, 7 on the lower surface of the key top 1.
The guide ends 6, 6 of the interlocking rod 3 are rotatably and slidably inserted into the hook 11 of the guide member. This guide member 1
0 is press-fitted into the mounting hole 9 so as to protrude upward from the keyboard frame 8.

In such a configuration, no matter which position of the key top 1 is pressed down, the key top 1 is pushed in while remaining in a horizontal state as a whole due to the action of the interlocking rod 3.

[Problems to be solved by the invention] However, since the guide member 10 that guides the interlocking rod 3 is a separate member from the keyboard frame 8, assembly work is required; However, since it protrudes upward from the keyboard frame 8, there is a problem that it may break during assembly or transportation.

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and includes a key top for opening and closing the key switch attached to the keyboard frame, and a key top for opening and closing the key switch. In a keyboard switch, guide members are provided on the keyboard frame in a state located on both sides, and interlocking rods are interposed between the guide members and the key top,
The interlocking rod has arm parts bent at right angles at both ends of a central straight part, and furthermore, the tips of the arm parts are bent at right angles to form guide ends protruding parallel to the straight part. The guide member is formed directly on the keyboard frame and includes a vertical guide groove into which the arm portion of the interlocking rod is loosely fitted, and a horizontal guide groove into which the guide end of the interlocking rod is loosely fit, is opened toward the upper surface side of the keyboard frame to form a guide protrusion on the lower surface side of the keyboard frame, and is formed in a shape that does not cast a shadow when viewed from the upper surface side of the keyboard frame, and the horizontal guide groove is The arm of the interlocking rod is formed in such a shape that it adjoins the guide protrusion, opens toward the bottom side of the keyboard frame, communicates with the vertical guide groove on the side, and does not cast a shadow when viewed from the bottom side of the keyboard frame. loosely fit into the vertical guide groove,
The guide end of the interlocking rod is guided by the upper surface side of a guide protrusion formed on the lower surface side of the vertical guide groove and the ceiling surface of the horizontal guide groove, and the straight portion of the interlocking rod is guided by the upper surface side of a guide protrusion formed on the lower surface side of the vertical guide groove, and the linear portion of the interlocking rod is It is rotatably engaged with the engagement member.

[Example] An example of the present invention will be described based on FIGS. 1 to 3. Note that the same parts as in FIGS. 4 and 5 are designated by the same reference numerals. Reference numeral 8 denotes a keyboard frame, and the keyboard frame 8 is integrally provided with a key switch case 22. Key switches 2 are attached to the key switch case 22 at predetermined intervals depending on the type of device, purpose of use, etc.
The pressing piece 14 of the key top 1 is press-fitted into the key stem of the key switch 2.
The key switch 2 is opened and closed by pressing the button. The key top 2 is a key switch 2.
It is not necessary if the size is approximately the same as one key switch, but if the size has a pressing surface that is more than twice as wide as key top 2, it will be necessary to move up and down reliably when pressing the corner of key top 1 to open and close it. Interlocking rod 3
is installed. The interlocking rod 3 has a straight portion 4, arm portions 5, 5, and guide end portions 6, 6, as explained with reference to FIGS. 4 and 5. The linear portion 4 of the interlocking rod 3 connects to the grooves 15 of the engaging members 7, 7 provided at two locations on the lower surface of the key top 1.
15 from the side and is rotatably engaged. Further, the guide ends 6, 6 of the interlocking rod 3 are engaged with guide members 10, 10 on both sides, which are directly integrally formed with the keyboard frame 8, respectively. This guide member 10 has an insertion hole 16 formed in the keyboard frame 8 for the guide end 6 of the direct interlocking rod 3, and a vertical guide groove 17 for moving the arm section 5 of the interlocking rod 3 from a plane. The vertical guide groove 17 has a substantially L-shaped hole formed therein, and a guide protrusion 18 is formed integrally with the keyboard frame 8 at the bottom of the vertical guide groove 17 .
A horizontal guide groove 19 is formed between the upper surface of the guide protrusion 18 and the cutout surface of the lower surface of the keyboard frame 8. This horizontal guide groove 19 has narrow sliding surfaces 20 and 21 protrudingly provided for smooth sliding.

In the above configuration, when the key top 1 shown in chain lines in FIG. is vertical guide groove 1
7, the key top 1 descends vertically as shown by the solid line in FIG. 3, and does not tilt even if the end of the key top 1 is pressed.

[Effect of the invention] Since the invention is constructed as described above, when the corner of the key top with a wide pressing surface is strongly pressed, the guide end of the interlocking rod slides along the guide groove and the key top moves up and down smoothly. It won't tilt. In addition, since the guide member does not protrude above the keyboard frame and is provided integrally with the keyboard frame, there is no need for installation work.
The guide member will not be damaged in the assembly.

Furthermore, the vertical guide grooves are drilled from the top side of the keyboard frame, and the horizontal guide grooves are drilled from the bottom side of the keyboard frame, so the keyboard frame can be molded using only the upper and lower split molds as before, making it special. does not require a specific type.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing an embodiment of the keyboard switch according to the present invention, Fig. 2 is a plan view of the same without the key top, Fig. 3 is a longitudinal sectional side view of the same, and Fig. 4 is an illustration of a conventional keyboard switch. FIG. 5 is a partially cutaway front view, and FIG. 5 is a side view of the same. 1...Key top, 2...Key switch, 3...
...Interlocking rod, 4...Straight line part, 5...Arm part, 6...
...Guide end, 7...Engaging member, 8...Keyboard frame, 10...Guiding member, 16...Guiding end insertion hole, 17...Vertical guide groove, 18...Guiding protrusion, 19... Horizontal guide groove, 20, 21...sliding surface.

Claims (1)

[Claims for Utility Model Registration] A key switch attached to a keyboard frame is provided with a key top for opening and closing the key switch, and guide members are provided on the keyboard frame located on both sides of the key switch, and the guide member and the key top are provided. In a keyboard switch having an interlocking rod interposed between the two, the interlocking rod has arm portions bent at right angles at both ends of a central straight portion, and further, the tips of the arm portions are bent at right angles. and forming a guide end protruding parallel to the linear part, and the guide member is formed directly on the keyboard frame, and the guide member has a vertical guide groove into which the arm part of the interlocking rod loosely fits, and the guide end of the interlocking rod. The vertical guide groove has a horizontal guide groove into which the keyboard frame is loosely fitted, and the vertical guide groove is open toward the top side of the keyboard frame to form a guide protrusion on the bottom side of the keyboard frame, and the vertical guide groove is shadowed when viewed from the top side of the keyboard frame. The horizontal guide groove is adjacent to the guide protrusion, opens toward the lower surface of the keyboard frame, partially communicates with the vertical guide groove, and extends from the lower surface of the keyboard frame. The arm part of the interlocking rod is loosely fitted into the vertical guide groove, and the guide end of the interlocking rod is connected to the upper surface of a guide protrusion formed on the lower side of the vertical guide groove. A keyboard switch characterized in that the key switch is guided by a side and a ceiling surface of the horizontal guide groove, and the linear part of the interlocking rod is rotatably engaged with an engaging member provided on the key switch.