JP3166978B2 - Press key structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressing key structure, and more particularly to a pressing key structure having a structure in which a plurality of pressing switches on a substrate fixed to a main body are pressed by a key top body integrally formed with a common support. About.

[0002]

2. Description of the Related Art Conventionally, various types of pressing key structures have been used, but in recent years, a structure in which a board-mounted small switch is pressed by a key top portion has been often used. This board-mounted type small switch has a wiring pattern printed on the board in advance, and the small switch is mounted on the surface.Since the wiring work of the conventional switch can be omitted, especially when many switches are provided. Has been adopted. In some cases, small switches mounted in this way use a type in which the key top part is provided integrally.However, in order to bring out the individuality and specialty of each manufacturer, it is recommended that the key top part be provided for each manufacturer. Normal.

FIG. 4 is a sectional view of a main part of a conventional pressing key structure using a small switch of a substrate mounting type, and shows a state of one of a large number of small switches provided. In this figure, the push switch 5 is surface-mounted on a substrate 6 and is fixed to the main body 100 using a stud portion 11. The main body 100 is provided with a key top hole 100a, and the key top 1 protrudes outward from the key top hole 100a.
Fixed to 00. An elastic portion 2 is integrally formed from the bottom of the key top portion 1.
Are individually fixed to the main body 100 at the welding portion 13 so that the key top portion 1 can be pressed toward the pressing switch 5 side.

[0004] With the above configuration, the key top portion 1 is set to the standby position shown in the drawing and to the operating position where the key top portion 1 is pressed and moved to the pressing switch 5 side. Since the workability is poor if the key tops 1 are individually welded and fixed to the main body 100 in this way, the key tops 10 in which the required number of the key tops 1 are integrally formed with a resin are recently attached to the substrate 6. It is provided between the main bodies 100.

FIG. 5 is a plan view of a conventional key top body 10, and four horizontal key top portions 1 are shown in FIG.
The support frame 3, which is arranged in a row and also serves as a passage for the molten resin in injection molding, is formed in the shape of a cross, and the elastic portion 2 is formed between the key top portion 1 and the support frame 3. It was done. Further, column portions 4 having a height corresponding to the distance between the substrate 6 and the main body 100 are formed at intersections of the support frame 3. In this way, the key top portion 1 formed of an integral resin is provided between the substrate 6 and the main body 100 so that the key top portion 1 protrudes from the key top hole portion 100a of the main body 100, thereby improving workability. It is intended to improve.

[0006]

However, in the former conventional example, the key tops 1 are individually fixed to the main body, so that the workability is poor. Must be replaced, which is uneconomical. In the latter case, as shown in FIG. 5, if a sufficient distance T can be secured between the key tops 1, the column 4 can be provided in the frame 3 so that one of the key tops can be provided. The effect that the elastic portion 2 is bent by the pressing of the key 1 is not transmitted to the adjacent key top portion 1. However, when the key top portions 1 are close to each other and the distance T cannot be sufficiently secured, the column portion 4 cannot be formed on the support frame 3, so that one of the key top portions 1 is pressed and the elastic portion 2 is pressed. The influence of the bending is transmitted to the adjacent key tops 1 and pushes the pressing switch, and there is a problem that the adjacent key tops move together without being pressed. Therefore, the pressing key structure of the present invention has been made in view of the above-described problems, and has as its object the advantage of excellent assembling workability and the influence of pressing of the adjacent key top portion is not affected by other key top portions. To provide a pressing key structure that does not extend to

[0007]

Means for Solving the Problems The above-mentioned problems are solved,
In order to achieve the object , according to the present invention, a support frame and
Multiple adjacent keys extending from the mounting base of the support frame
A key that is integrally molded with an elastic part that elastically supports the top part.
-Top body, and the key top body is located between the main body and the substrate.
The key top hole of the main body is fixed
When multiple adjacent key tops protrude outside from
In both cases, press the switch on the board fixed to the main body.
A pressing key structure pressed by the key top portion.
The hole for the key top of the main body is a horizontally long communication hole.
And the plurality of key tops are outside the communication holes.
And from the mounting base of the support frame
Elastically supports multiple adjacent key tops
The key top body in which the elastic part is integrally molded with resin
Formed near the mounting base of the elastic part of the body,
A column held between the substrate and the main body, and the column
Sub column formed in the vicinity of the portion, the column portion and the
Continuing the sub pillar portion to prevent the pillar portion and the sub pillar portion from falling down
And a key top portion of the key top body.
Is supported and fixed by the pillar portion, the sub pillar portion, and the wall portion.
It is characterized by:

[0008]

In the above construction, the influence of the pressing of the adjacent key top portion is affected by the holding state of the column portion formed near the mounting base of the integrally molded key top body and held between the substrate and the main body. Works like no other key top. Also, the assembly work is simplified.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an external perspective view of a key top body 10 used for a pressing key structure, and shows a part thereof. In the figure, the key tops 1 are formed to be laterally long (about 20 mm) as shown in the figure, and the interval T between adjacent key tops 1 is 0.1 mm.
The key top hole 100a on the main body 100 side is formed as a horizontally long communication hole.
A flange portion 1f is formed at the edge of the bottom surface of the key top portion 1 as shown in the figure, and a part of the flange portion 1f presses a pressing switch or serves as a gate for resin injection during molding. The pressing portion 1a is formed in a protruding state. Here, the switch may be pressed directly at the bottom of the key top 1 instead of the pressing portion 1a as in the related art.

On the other hand, a pair of elastic portions 2 are integrally molded with the support frame 3 of the key top portion 1 from the side facing the pressing portion 1a. The support frame 3 also serves as a flow path for the molten resin during injection molding. A substrate 6 and a main body 10 which will be described later are mounted on the mounting base of the elastic portion 2 of the support frame 3.
The column part 4 held between 0 is integrally molded with resin. In addition, a sub-column 7 having the same function as the column 4 and further stabilizing the support state by the column 4 is formed near the column 4, and the column 4 and the sub-column 7 are formed into a wall. 8 prevents the column portion 4 and the sub column portion 7 from falling down and smoothens the flow of the molten resin.

Further, an arc portion 3a is formed in the support frame 3 between the pillar portions 4 as shown in the figure, and the pressing portion 1a of the key top portion 1 in the second row can be located inside the arc portion 3a. In addition, when the pressing portion 1a is used as a resin injection gate, the mold spool gate is not obstructed. FIG. 2 is a cross-sectional view of an essential part of the pressing key structure of the key top body 10 of FIG. 1, and shows one of a large number of the provided keys. In this figure, a push switch 5
Is mounted on the substrate 6 and is fixed to the main body 100 by using a stud portion 11.

The above-described key top body 10 is formed through a key top hole 100a formed in the main body 100 through a key top portion 1a.
Are fixed to the main body 100 in a state of protruding outward from the key top hole 100a. For this reason, the above-mentioned pillar portion 4 is positioned by entering a concave portion formed on the back side of the main body 100, or is positioned by entering a hole portion of the substrate 6 side. Is also good.

The board 6 on which a plurality of push switches 5 are mounted at predetermined positions is screwed after setting the key top body 10 on the stud section 11 of the main body 100, so that the pushing section 1a is The push switch 5 is located above the actuator section 5a. In addition, since the pillar 4, the sub pillar 7, and the wall 8 of the key top body 10 are firmly fixed between the board 6 and the main body 100 only by screwing the board 6, the key top body 10 is attached. The work is greatly simplified.

In the above configuration, when the key top portion 1 is pressed and the elastic portion 2 is deflected and moved to the position shown by the broken line, the key top portion 1 is individually moved to the column portion 4 and the sub column portion 7 respectively. Since the key top 1 is supported and fixed by the wall 8, the adjacent key top 1 is not affected by bending. Next, FIG. 3 is a plan view of the key top body 10. As shown, the key tops 1 are formed in two horizontal rows, and four key tops 1 are provided in one row. It can be formed so as to give an effect that one key top is formed in one horizontal row in appearance.

The key top body 10 described above is suitable for a case where many key tops are provided in a limited area such as an operation panel in a facsimile apparatus. Further, in the above-described embodiment, the key top portion is limited to the horizontally long key top portion. However, it is needless to say that the key top portion is not limited to this.
It is also possible to shorten the resin molding process by manufacturing the key top portion in a row arrangement in advance and using a key top portion divided into one row.

[0016]

As described above, according to the present invention,
When installing in the horizontally long communication hole for the key top of the main unit
Thus, it is possible to provide a pressing key structure which is excellent in assembling workability and does not affect the other key top portions due to the pressing operation of the adjacent key top portion.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a key top body 10 used for a pressing key structure.

FIG. 2 is a sectional view of a main part of a pressing key structure using the key top body 10 of FIG.

FIG. 3 is a plan view of the key top body 10. FIG.

FIG. 4 is a cross-sectional view of a main part of a conventional pressing key structure using a small-sized switch of a substrate mounting type.

FIG. 5 is a plan view of a conventional key top body 10. FIG.

[Explanation of symbols]

 1 key top part, 2 elastic part, 3 support frame, 4 pillar part, 5 push switch, 6 substrate, 10 key top body.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-80422 (JP, A) JP-A-60-1005028 (JP, U) JP-A-1-142125 (JP, U) (58) Investigation Field (Int.Cl. ⁷ , DB name) H01H 21/00

Claims (1)

(57) [Claims] A support frame extending from a mounting base of the support frame;
Bullets that elastically support a plurality of adjacent key tops
A key top body integrally formed of a resin and
The top body is provided and fixed between the main body and the substrate, and
Multiple adjacent keyholes through the key top hole
Projecting to the outside, and fixed to the main body.
Press the push switch on the board to be
A pressing key structure for pressing, wherein a hole for the key top of the main body is formed as a horizontally long communication hole.
And the plurality of key tops are externally formed from the communication holes.
A plurality of adjacent ones protruding and extending from the mounting base of the support frame
The elastic part that elastically supports the key top part is integrally molded with resin.
The key top body is a mounting base of the elastic portion of the support frame.
Formed between the substrate and the main body.
And a column formed in the vicinity of the column.
Sub column portion, and the column portion and the sub column portion
And a wall portion for preventing the sub column portion from falling down, wherein the key top portion of the key top body is formed by the column portion and the sub column.
A pressing key structure, wherein the pressing key structure is supported and fixed by a portion and the wall portion .