JPH0594736A - Push-pressing key structure - Google Patents

Abstract

PURPOSE:To provide a push pressing key structure which is excellent in workability of assembly and by which push pressing influence of adjacent key top parts is hardly exerted upon the other key top parts. CONSTITUTION:Plural adjacent key top parts 1 projecting outside from a key top hole part of a main body are held elastically. In order to push-press a push-pressing switch on a board fixed to the main body by means of the key top parts 1, there is provided a key top body 10 formed of resin integrally of a common support frame body 3, elastic parts 2 which are arranged extendedly from an installation base part of the support frame body 3 and support elastically the key top parts 1 and pillar parts 4 which are formed in the vicinity of the installation base part and are held between the board and the main body.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, pressing key structures having various structures have been used, but in recent years, a structure in which a board-mount type small switch is pressed by a key top portion has been widely used. This board-mounting type small switch is one in which a wiring pattern is printed and formed on the board in advance and the small switch is surface-mounted. Since wiring work of a conventional switch can be omitted, especially when a large number of switches are provided. Has been adopted. The small switch mounted in this way may use a type in which the key top part is integrally provided, but in order to bring out the individuality and peculiarity of each manufacturer, it is necessary to provide the key top part for each manufacturer. It is normal.

FIG. 4 is a cross-sectional view of a main part of a conventional pressing key structure using a board mounted type small switch, showing one of a large number of small switches. In the figure, the push switch 5 is surface-mounted on the substrate 6, and is fixed to the main body 100 using the stud portion 11. Further, the main body 100 is provided with a key top hole portion 100a, and in the state where the key top portion 1 projects outward from the key top hole portion 100a, the main body 1
It is fixed to 00. An elastic portion 2 is integrally formed from the bottom of the key top portion 1.
The key top portion 1 can be pressed to the press switch 5 side by individually fixing the key top portion 1 to the main body 100 at the welding portion 13.

With the above configuration, the key top portion 1 is set to the standby position shown in the figure and the operating position in which the key top portion 1 is pushed and moved to the push switch 5 side. Since the workability is poor if the key tops 1 are individually welded and fixed to the main body 100 as described above, recently, a key top body 10 in which a necessary number of the key tops 1 are integrally formed with a resin is formed on the substrate 6. It is arranged between the main bodies 100.

FIG. 5 is a plan view of a conventional key top body 10, in which four laterally long key top portions 1 are arranged as shown in FIG.
The support frame 3 arranged in rows and also serving as a passage for the molten resin in the injection molding is formed in a "square" shape, and the elastic portion 2 is formed between the key top portion 1 and the support frame 3. It was done. Further, pillar portions 4 having a height corresponding to the above-mentioned substrate 6 and the main body 100 are formed at intersections of the supporting frame bodies 3, respectively. In this way, the key top portion 1 integrally formed with the resin is provided between the substrate 6 and the main body 100 by projecting the key top portion 1 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 described above, the key tops 1 are individually fixed to the main body, so that the workability is poor, and even if the key tops 1 are damaged, the entire main body is damaged. 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 top portions 1, the column portion 4 can be provided in the frame portion 3, so that one key top portion can be provided. The influence of the elastic deformation of the elastic portion 2 when 1 is pressed 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 pillar portion 4 cannot be formed on the support frame body 3, and as a result, one key top portion 1 is pressed and the elastic portion 2 is formed. The influence of the bending is transmitted to the adjacent key tops 1 and pushes the push switch, or there is a problem that the adjacent key tops move together without being pushed. Therefore, the pressing key structure of the present invention has been made in view of the above-mentioned problems, and an object thereof is excellent in assembly workability, and the influence of the pressing of the adjacent key top portion is different from other key top portions. It is to provide a pressing key structure that does not extend to

[0007]

In order to solve the above-mentioned problems and achieve the object, the pressing key structure of the present invention has the following structure. That is, a plurality of adjacent key top portions projecting outward from the key top hole portion of the main body are elastically held with respect to the main body, and a press switch on a substrate fixed to the main body is provided on the key top. A pressing key structure for pressing by means of a common support frame, an elastic part extending from the mounting base of the supporting frame for elastically supporting the key top part, and formed in the vicinity of the mounting base. The key top body is integrally resin-molded with a pillar portion held between the substrate and the main body. Further, preferably, the key top portion is formed in a plurality of rows with respect to the support frame body, integrally forms a pressing portion that presses the pressing switch, and supports an avoidance portion that avoids the pressing portion. It is formed in a frame.

[0008]

In the above structure, due to the holding state of the pillar portion which is formed in the vicinity of the mounting base portion of the key top body integrally molded with resin and is held between the substrate and the main body, the influence of the pressing of the adjacent key top portion is affected. It works so as not to reach other key tops. Also, the assembly work is simplified.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the pressing key structure of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an external perspective view of a key top body 10 used for a pressed key structure, and shows a part thereof. In the figure, the key top portion 1 is formed horizontally long (around 20 mm) as shown in the drawing, and the interval T between the adjacent key top portions 1 is 0.
It is set within 5 mm, and the key top hole portion 100a on the main body 100 side is formed as a laterally 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 drawing, and a pressing switch is pressed from a part of the flange portion 1f and serves as a gate for resin injection during molding. The pressing portion 1a is formed in a protruding state. Here, as a matter of course, instead of the pressing portion 1a, the switch may be directly pressed at the bottom of the key top portion 1 as in the conventional case.

On the other hand, a pair of elastic portions 2 are integrally resin-molded with the supporting frame 3 through which the key top portion 1 is provided, 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 base plate 6 and a main body 10 which will be described later are provided at the mounting base of the elastic portion 2 of the support frame 3.
The column portion 4 held between 0 is integrally resin-molded. Further, near the pillar portion 4, a sub pillar portion 7 having a function similar to that of the pillar portion 4 and further stabilizing the supporting state by the pillar portion 4 is formed, and the pillar portion 4 and the sub pillar portion 7 are connected to the wall portion. The column portion 4 and the sub column portion 7 are prevented from collapsing by 8 to make the molten resin flow smoothly.

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

The above-mentioned key top body 10 has a key top hole portion 100a formed in the main body 100 and a key top portion 1
Is fixed to the main body 100 in a state of protruding outward from the key top hole portion 100a. For this reason, the above-mentioned pillar portion 4 is positioned by being inserted into a recess formed on the back side of the main body 100, or is positioned by being inserted into a hole portion on the side of the substrate 6. Is also good.

Further, the board 6 on which the pressing switches 5 are mounted at a plurality of predetermined positions is screwed after the key top body 10 is set on the stud portion 11 of the main body 100, so that the pressing portion 1a is formed. The pressure switch 5 is located above the actuator portion 5a. Further, the pillar portion 4, the sub pillar portion 7, and the wall portion 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, so that the key top body 10 is mounted. The work is greatly simplified.

In the above structure, when the key top portion 1 is pressed and the elastic portion 2 bends and is moved to the position shown by the broken line, the key top portion 1 is individually provided with the pillar portion 4 and the sub pillar portion 7. Since it is supported and fixed by the wall portion 8, the adjacent key top portion 1 is not affected by the bending. Next, FIG. 3 is a plan view of the key top body 10, and as shown in the figure, the key top portions 1 are formed so as to have two horizontal rows, and one row has four key top portions 1. The key tops are formed so as to give the effect of forming one key top in one horizontal row.

The key top body 10 described above is suitable for providing a large number of key tops in a limited area such as an operation panel in a fax machine. Further, in the above-described embodiment, the horizontally long key top portion is limited, but it is needless to say that the key top portion is not limited to this.
The resin molding process can be shortened by manufacturing the key top portion of the row arrangement in advance and using the one divided into one row.

[0016]

As described above, according to the present invention, it is possible to provide a pressing key structure which is excellent in assembling workability and in which the influence of the pressing of the adjacent key top portions does not affect other key top portions. it can.

[Brief description of drawings]

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

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

3 is a plan view of the keytop body 10. FIG.

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

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

[Explanation of symbols]

 1 key top part, 2 elastic parts, 3 support frame body, 4 pillar parts, 5 press switches, 6 substrates, 10 key top bodies.

Claims (2)

[Claims] 1. A plurality of adjacent key top portions projecting outward from a key top hole portion of a main body are elastically held, and a pressing switch on a substrate fixed to the main body is provided by the key top portion. A pressing key structure for pressing, comprising a common supporting frame, an elastic portion extending from the mounting base of the supporting frame for elastically supporting the key top portion, and formed in the vicinity of the mounting base. A pressing key structure comprising a key top body in which the substrate and a column portion held between the main body are integrally resin-molded. 2. The key top portion is formed in a plurality of rows with respect to the support frame body, integrally forms a pressing portion that presses the pressing switch, and supports an avoidance portion that avoids the pressing portion. The press key structure according to claim 1, wherein the press key structure is formed on a frame.