JPH043606B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] It takes a long time to form a seal tape in the assembly of a push-button switch, and this is one of the causes of inhibiting reductions in manufacturing costs. Therefore, by improving the manufacturing method of the seal tape, it was possible to shorten the assembly time and reduce the manufacturing cost of the push button switch.

[Industrial application field]

The present invention relates to a push button switch constituting a key input device such as a keyboard, and more particularly to a method for manufacturing a seal tape which is one of the main parts constituting the push button switch.

A push-button switch that utilizes the reversing movement of a dome-shaped disc spring has a snap action that stimulates the operator's fingertip when the disc spring reverses when the push-button switch is activated, and provides feedback to the operator that the push-button switch has been activated. Therefore, a keyboard configured using this can reduce keystroke errors and improve keystroke speed. In addition, it has a simple structure and can be automatically mounted on a keyboard, making it possible to reduce the price of the keyboard, so it is widely used in various keyboards.

FIG. 4 is a side sectional view showing the structure of the push button switch.

In the figure, the push button switch is composed of an operating section 2 mounted on a panel 1 and a switch element section 4 mounted on a printed circuit board 3. The operating section 2 is composed of a slider 21 made of plastic molded.
and a housing 22 that slidably encloses the slider 21 in the vertical direction.

On the other hand, the switch element part 4 includes a terminal plate 41 made of molded plastic, lead terminals 42 and 43 insert-molded in the terminal plate 41, and a dome-shaped disc spring 44 mounted downwardly in the recess 41a of the terminal plate 41. Consisting of a cover material 51 smaller than the recess 41a and a sealing material 61 larger than the recess 41a,
It is composed of a seal tape 45 in which the peripheral edge of the seal material 61 is adhered to the terminal plate 41, and an actuator 46 whose one end is fixed to the upper surface of the terminal plate 41 by heat caulking or the like.

However, in assembling the switch element section 4, the formation of the sealing tape 45 made of the cover material 51 and the sealing material 61 and the attachment of the sealing tape 45 to the terminal plate 41 are performed by placing the dome-shaped disc spring 44 face down on the terminal plate 41. This is more difficult than the work of fixing the actuator 46 to the terminal board 41, and may cause a decrease in reliability or an obstruction to shortening the assembly time.

Therefore, it is desired to realize a sealing tape manufacturing method that can improve the reliability in assembling the switch element part and shorten the time for assembling the switch element part.

[Conventional technology]

FIG. 5 is a perspective view showing a conventional sealing tape manufacturing method.

In the figure, a cover material 51 is cut out from the first insulating film 5 using a cutter 71, and is adsorbed by a vacuum chuck 72, moved onto the second insulating film 6, and affixed at a predetermined position.

The arrangement pitch of the cover material 51 stuck to the insulating film 6 matches the length of the sealing material 61, and the width of the insulating film 6 is cut in advance to match the width of the sealing material 61. . Therefore, by cutting the insulating film 6 to match the length of the sealing material 61 using the cutter 73, a sealing tape 45 is formed in which the cover material 51 is adhered to a predetermined position of the sealing material 61. be able to.

The assembly device for the switch element part has the above-mentioned sealing tape forming mechanism built-in, and the formed sealing tapes 45 are held and moved one by one by the clamps 74, and overlapped at a predetermined position on the terminal board 41. It's attached.

[Problem that the invention seeks to solve]

Conventional sealing tapes are formed one by one in a switch element assembly apparatus in accordance with the assembly speed of the switch element parts. However, a vacuum chuck 72 is required to attach the cover material 51 and the insulating film 6.
The process includes a series of steps of movement, adsorption of the cover material, movement, and adhesion of the cover material, and if the speed of this series of steps is increased, mistakes in adhesion of the cover material 51 will occur frequently.
In addition, attaching the seal tape 45 and the terminal board 41 includes a series of steps of moving the clamp 74 → sealing tape clamping → moving → sealing tape attachment.
By speeding up this series of processes, seal tape 4
5. Pasting errors occur frequently. That is, the process of forming the seal tape and adhering it to the terminal board becomes a cause of impeding high speed assembly of the switch element section. Moreover, there was a problem in that the conventional sealing tape could not be manufactured outside the switch element assembly line.

[Means for solving problems]

FIG. 1 is a side sectional view showing the main steps of the manufacturing method according to the present invention. The same objects are represented by the same symbols throughout the figures.

The above problem can be solved by making a cutting line in advance only on the first insulating film 5 to which the second insulating film 6 is bonded, and at least covering material connected to the surrounding area by the second insulating film 6. 51, then a cutting line is made only in the second insulating film 6, and a sealing material 61 connected to the surroundings by the first insulating film 5 is formed. This problem is solved by the sealing tape manufacturing method of the present invention, which is characterized in that the second insulating film 63 is peeled off and removed from the first insulating film 5.

[Effect]

The waste material after cutting out the cover material or sealing material from the insulating film is called waste. 1st
In the figure, a cover material 51 is formed on the first insulating film 5 and a sealing material 61 is formed on the second insulating film 6, which are bonded in advance, and then the sealing material 61 is cut out.
By removing the cover material 51, the cover material 51 is stuck to a predetermined position of the seal material 61, and the peripheral edge of the seal material 61 is supported by the waste 52 after cutting out the cover material 51. A sealed tape 45 is formed.

This sealing tape manufacturing method can form a large number of sealing tapes at high speed, and can be manufactured outside the assembly line regardless of the assembly speed of the switch element, so there are no problems that hinder high speed. Since one is eliminated, high speed assembly of the switch element section can be realized.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that FIG. 2 is a plan view showing an embodiment of the present invention, and FIG. 3 is a diagram showing an example of a method of pasting a seal tape.

As shown in FIG. 1A, the sealing tape 45 is composed of a cover material 51 and a sealing material 61, and an adhesive layer 62 provided on one side of the sealing material 61 is covered with the cover material 51 except for the peripheral edge. . In manufacturing the seal tape 45, as shown in FIG. 1b, the first insulating film 5 for forming the cover material 51 and the second insulating film 6 for forming the sealing material 61 are bonded in advance. has been done.

In the cover material forming step shown in FIG. 1b, a roller 82 having a cutting edge 81 created around the periphery and a roller 83 supporting the bonded insulating film from the opposite side are rotated in the direction of the arrow. A cutting line 53 is inserted only into the insulating film 5 and the cover material 51 is cut.
form. However, the cover material 51 and waste 5
2 through a second insulating film 6.

In the sealing material forming step shown in FIG. Cutting line 64 is inserted only into insulating film 6 and sealing material 61 is inserted.
form. However, the seal material 61 and waste 6
3 refers to the first insulating film 5 (waste 5
2).

In the waste removal step shown in FIG. 1d,
By peeling and removing the waist 63 from the waist 52, the cover material 51 is affixed to a predetermined position of the seal material 61, and is arranged on the waist 52 at equal intervals and supported at the peripheral edge. A seal tape 45 can be formed.

In one embodiment of the present invention, as shown in Fig. 2, the operations from the cover material forming process to the waste removal process are performed continuously, and moreover, a plurality of sealing tapes (three in this embodiment) are used. They are formed at the same time and divided in the final process.

(1) Cover material forming process: Forming the cover material 51 and forming the guide hole 54 for supplying the seal tape to a predetermined position when assembling the switch element part.
form.

(2) Sealing material forming step: forming the sealing material 61.

(3) Guide hole extrusion process: Extrusion is performed to ensure removal of the slag from the guide hole 54.

(4) Waste removal process: After removing the waste 63, inspect the remaining seal tape. Note that the waste from the guide hole 54 is removed while being joined to the waste 63.

(5) Slitting process: Divide multiple seal tapes formed at the same time.

By forming the seal tapes 45 which are arranged at equal intervals on the waist 52 and whose peripheral edges are supported, the seal tapes 45 can be attached to the terminal plate 41 when assembling the switch element part as shown in FIG. 3, for example.
This makes it possible to continuously supply the seal tape between the seal tape and the seal tape sticking roller 9, and there is no longer a need for a clamp that has hindered high speed assembly of the switch element section.

This sealing tape manufacturing method can form a large number of sealing tapes at high speed, and can be manufactured outside the assembly line regardless of the assembly speed of the switch element. Therefore, the sealing tape shown in FIG. By using the adhesion method in combination, there is no cause for impeding speed increase, and it is possible to achieve high speed assembly of the switch element part.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a method of manufacturing a seal tape that reduces the assembly time of a push button switch and reduces the manufacturing cost.

[Brief explanation of drawings]

Fig. 1 is a side cross-sectional view showing the main steps of the manufacturing method according to the present invention, Fig. 2 is a plan view showing an embodiment of the present invention, and Fig. 3 is a diagram showing an example of the method of applying sealing tape. , FIG. 4 is a side sectional view showing the structure of the push button switch, and FIG. 5 is a perspective view showing a conventional sealing tape manufacturing method. In the figure, 5 and 6 are insulating films, 9 is a sealing tape pasting roller, 41 is a terminal board, 45 is a sealing tape, 51 is a cover material, 52 and 63 are waists,
53 is a cutting line, 54 is a guide hole, 61 is a sealing material, 62 is an adhesive layer, 64 is a cutting line, 81, 84
represents the cutting blade, and 82, 83, 85, and 86 represent the rollers, respectively.

Claims (1)

[Claims] 1. Consists of a cover material 51 formed from a first insulating film 5 and a sealing material 61 formed from a second insulating film 6, and an adhesive provided on one side of the sealing material 61. When manufacturing the seal tape 45 in which the agent layer 62 is covered with the cover material 51 except for the peripheral edge, only the first insulating film 5 which has been joined to the second insulating film 6 in advance is used. A cutting line is inserted into the second insulating film 6 to form at least the cover material 51 that is connected to the surroundings by the second insulating film 6. Then, a cutting line is inserted into only the second insulating film 6 and the first The sealing material 61 is connected to the surroundings by the insulating film 5, and then the second insulating film 63 other than the sealing material 61 is peeled off from the first insulating film 5. , a method for manufacturing a seal tape, characterized by removing the tape.