JPH03147216A - Installation of coil spring for push type electric component - Google Patents

Abstract

PURPOSE:To prevent dust from entering the component and prevent a multiple number of switches from being tangled, when a spring stop plate is bent, by pressing a coil spring forward with a cut and erected portion so that the coil spring end engage resiliently with the end of a slider. CONSTITUTION:A spring stop plate 11 is provided with a cut and erected portion 22 on which the rear end of a coil spring 8 is hooked. The coil spring 8 is pressed forward with the erected portion 22 by a single action of bending the spring stop plate 11 in the direction of closing a spring insertion hole 9 of a case 1. This eliminates the need for a conventional spring push rod, improves the ease of the work, and eliminate the limit of the width of the plate 11. Therefore, the plate 11 may be made of the same width with that of the spring insertion hole 9 of the case 1. As a result, dust is unlikely to enter from the back side of the case. Since there is no gap between the spring insertion hole 9 and the plate 11, other switch terminal 15 cannot be tangled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for mounting a coil spring for repelling a knob of a push-type electrical component such as a push switch.

[Prior Art] Figures 4 to 7 are explanatory diagrams of conventional examples, where Figure 4 is a perspective view of a push switch, Figure 5 is an exploded perspective view of the switch with the cover removed, and Figure 6 is an exploded perspective view of the switch. is a side view from the input direction in FIG. 4, and FIGS. 7(a), 7(b), and 7(c) are explanatory views showing how to attach the coil spring to the switch.

In Fig. 5, 1 is the case of the switch, and 2 is the case 1.
With a slider that can be moved to.

The rear end 2a has a spring guide part 2b, and the tip has a knob 2.
It has c. A slider 3 is embedded in the slider 2, and the tip of the slider 3 branches into two contact pieces 4.5. 6 and 7 are the contact pieces 4 formed on the bottom surface of the case 1;
5 is a slidable pattern, 8 is a coil spring, and the spring 8
is housed in the case 1 through the spring insertion hole 9 on the rear surface of the case 1, and the front portion of the spring 8 is loosely fitted into the spring guide portion 2b. In FIG. 4, reference numeral 10 denotes a metal cover that covers the upper surface of the case 1, and a spring stopper plate 11 is integrally provided at the rear end of the cover 10.

Insert the protrusion 14 of the case 1 into the hole 13 of the mounting part 12 provided on both sides.
It is attached to the case 1 by fitting the two. 15
are terminals buried on both the left and right sides of the case 1.

The coil spring 8 is assembled by bending the spring stopper plate 11 of the cover 10 so as to close the spring insertion hole 9 of the case 1.
is inserted between the rear end 2a of the slider 2 and the spring stopper plate 11 in a compressed state.

The above switch can be operated by pressing the knob 2c at the tip of the slider 2 backwards (to the right in Figure 4).
When the contact pieces 4 and 5 are ONL in pattern 6.7, the switch contacts are turned ON, and the pressure on the knob 2C is stopped, the elastic force of the coil spring 8 causes the knob 2C to return to its original state before being pressed. The contact pieces 4 and 5 of the switch 3 are separated from the pattern 6.7, and the contact point of the switch becomes FF.

[Problems to be Solved by the Invention] By the way, in order to install the above-mentioned coil spring 8 into the case 1 using an automatic machine, first, the spring retaining plate 11 is in an extended state as shown in FIG. 7(a). Then, insert the spring push rod 1 into the spring insertion hole 9 of the case 1, and then insert the spring push rod 1 as shown in the same figure (b).
The coil spring 8 is pressed into the case 1 by the pair of arms 17 and 18 of the spring push rod 16, and the spring stop plate 11 is located in the relief recesses 1 and 9 of the spring stop plate 11 of the spring push rod 16. Next, the same figure ()
As shown in FIG. A spring 8 is inserted between the rear end 2a of the slider 2 and the spring stopper plate 11.

However, when using the spring push rod 16 as described above,
Since it is necessary to provide a slight gap 21 between both sides of the recess 19 and both sides of the spring stopper plate 11, the width ta of the spring stopper plate 11 is smaller than the spring insertion hole 9 of the case 1, as shown in FIG.
Therefore, dust can enter through the gap 21 between both sides of the spring stopper plate 11 and both sides of the spring insertion hole 9, easily causing contact failure of the switch, and causing a large number of switches to be damaged. When they are stored together, there is a problem that the terminals 15 of other switches may get into the gap 21 of the switch, causing the two switches to become entangled.

The present invention aims to eliminate the above-mentioned conventional drawbacks. 1. An object of the present invention is to provide a structure that prevents dust from entering through the gap between the spring insertion hole and the spring stopper plate, and to organize a large number of switches together. The present invention aims to provide a spring mounting method for a push-type electrical component that does not cause multiple switches to become entangled when stored together.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention covers a case with a metal cover to constitute a frame, movably stores a slider in the case, and Inserting a coil spring into the frame through the spring insertion hole at the rear end, loosely fitting it into the slider, and closing the spring insertion hole of the case by bending a spring stopper plate provided on an extension of the rear end of the metal cover. In the coil spring mounting method for a push-type electrical component, which comprises inserting a coil spring in a compressed state between the rear end of a slider and a spring stopper plate, a cut-and-raised piece is provided on the back side of the spring stopper plate of the metal cover, and When the cut and raised piece is hooked on the rear end of the coil spring and the spring stopper plate is bent, the cut and raised piece presses the coil spring forward and the tip of the coil spring is pressed against the rear end of the slider. Lock it.

[Function] According to the method of the present invention, a cut and raised piece is provided on the spring stopper plate,
When the spring stopper plate is bent, the coil spring is pressed forward by the cut and raised piece, so there is no need to press the coil spring with the conventional spring pusher rod, and the work efficiency is improved compared to the conventional one. It is simplified, and the width of the cut-and-raised piece is not limited like in the past, so it can be set to approximately the same width as the spring insertion hole in the case, and the spring insertion hole in the case and the spring stopper plate can be set to approximately the same width. Since there is no gap between the two switches, it is possible to prevent dust from entering, the switch is less likely to cause a contact failure, and the terminals of other switches will not become entangled in the gap.

[Embodiments] Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

Figures 1 to 3 are detailed explanatory views of the present invention, where Figure 1 is a perspective view of the push switch, Figure 2 is a side view from direction B in Figure 1, Figure 3 (A), (B) is a cross-sectional view showing a state in which the coil spring is installed inside the frame.

Note that parts that are the same as those of the conventional example shown in FIGS. 4 to 7 are given the same reference numerals, and redundant explanations will be omitted.

The difference between the method of the present invention and the conventional invention is shown in Figure 3 (a).
As shown in FIG.
As shown in b), the spring stopper plate 11 is bent in a direction that closes the spring insertion hole 9 of the case 1, and the piece 22 is cut and raised.
The point is that the coil spring 8 is pressed forward at
According to this method, there is no need to use the conventional spring push rod 16, so work efficiency is improved, and the spring stop plate 11
By making the width of the spring stopper plate 11 approximately the same as the width of the spring insertion hole 9 of the case 1, it becomes difficult for dust to enter from the rear surface of the frame. A gap 21 between the insertion hole 9 and the spring stopper plate 11
Since there are no terminals 15 of other switches, the terminals 15 of other switches will not be tangled.

[Effects of the Invention] According to the present invention, the coil spring can be pressed forward by a single action of bending the spring stopper plate formed at the end of the metal case, and workability is improved compared to the conventional case. Since there is no gap between the spring insertion hole and the spring stopper plate, it is difficult for chips to enter the frame, and
Even if a large number of switches are accumulated, the switches will not become entangled with each other.

[Brief explanation of the drawing]

1 to 3 are detailed explanatory diagrams of the present invention, in which FIG. 1 is a perspective view of the push switch, FIG. 2 is a side view from direction B in FIG. 1, and FIGS. b). Sectional view showing a state in which the coil spring is installed in the frame, No. 4
Figures 7 to 7 are explanatory diagrams of conventional examples. Figure 4 is a perspective view of the push switch, Figure 5 is an exploded perspective view of the switch with the cover removed, and Figure 6 is direction A in Figure 4. The side views of FIGS. 7A, 7B, and 7C are explanatory diagrams showing how to attach the coil spring to the switch. 1...Case, 2...Slider, 2
a...Rear end, 8...Coil spring, 9...
...Spring insertion hole, 1°...Cover, 11...
...Spring stop plate, 23...Cut and raised piece. Figure 1 Figure 2 Figure 3 (a) (r7) Figure 4

Claims (1)

[Claims] A frame body is constructed by covering the case with a metal cover, and a slider is movably housed in the case, and a coil spring is inserted into the frame body through the spring insertion hole at the rear end of the case and loosely fitted into the slider. A push-type electrical appliance is constructed by bending a spring stopper plate provided on an extension of the rear end of the cover to close the spring insertion hole of the case, thereby inserting a coil spring in a compressed state between the rear end of the slider and the spring stopper plate. In the method for attaching a coil spring to a component, a cut and raised piece is provided on the back side of the spring stopper plate of the metal cover, the cut and raised piece is hung on the rear end of the coil spring, and when the spring stopper plate is bent, the A method for attaching a coil spring to a push-type electrical component, characterized in that the tip of the coil spring is elastically locked to the end of a slider by pressing the coil spring forward with a cut and raised piece.