JPS63307628A - Extra-small switch and its manufacture - Google Patents

Abstract

PURPOSE:To reduce manufacturing processes and enhance the quality and accuracy by molding a knob of synthetic resin in a single body with an electroconductive contact piece by insert molding means. CONSTITUTION:A knob b of synthetic resin is molded in a single body using an insert molding machine. By this insert molding means, a washer 5 with boss 6 formed on the facial side of a base plate forming an electroconductive contact piece a and a backing plate 8 formed on the rear side are coupled together at the ends of a through hole 4 and the backing plate 8 so as to accomplish a consolidated structure. By a press machine, a leg plate 2 of this electroconductive contact piece a is folded into lower spread form with the edge of backing plate 8 as fulcrum, and a coupling plate 3 is cut at necessary points to yield switching parts. This enhances the quality and accuracy of switches and reduces manufacturing processes.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an improved micro-switch component that can be mounted on a printed circuit board or the like, and a method for manufacturing the same.

[Summary of the Invention] The present invention provides an ultra-compact switch configured by attaching a synthetic resin knob to a conductive contact piece, in which the synthetic resin knob is assembled to the conductive contact piece by insert molding means, thereby improving the quality and accuracy of the switch. The aim is to improve the manufacturing process and reduce the number of manufacturing processes.

[Conventional technology] Conventionally, ultra-small slides that can be mounted on printed circuit boards, etc.
As a switch (approximately 2-3 cubes).

A switch manufactured by the manufacturing process shown in FIGS. 9 to 11 is known.

That is, a thin hoop-shaped metal strip H with a thickness of about 0.11
A punching process is performed on the base plate part 1 and four foot plate parts 2 protruding from both sides thereof.

A conductive contact piece a consisting of a connecting plate part 3 and a caulking hole 4 is continuously punched and formed through the connecting plate part 3,
Separately, a seat plate portion 5 is made of synthetic resin material.

A knob b consisting of a protrusion 6 protruding from the center of the upper surface and a short shaft part 7 protruding from the center of the lower surface is formed, and the knob b is shaped so that the short shaft part 7 is inserted into the hole 4 of the conductive contact piece a. (see the left side in Figure 10), then caulk the short shaft part 7 so that it will not come out of the hole 4.
(See center part of Figure 0).

Then, fold the four foot plate parts 2 into a shape (the 10th
(See the right side of the figure), the connecting plate portion 3 is cut to complete the switch product.

[Problems to be solved by the invention] In the method for manufacturing the above-mentioned ultra-small slide switch,
In order to assemble the knob b to the conductive contact piece a, in addition to the insertion process of the short shaft part 7, a caulking process of the short shaft part 7 is required. In addition, the caulking process of the short shaft portion 7 with a small diameter is unstable;
Moreover, the state of caulking cannot be determined from the outside, resulting in poor product reliability.

Furthermore, when the four foot plate parts 2 are bent into a U-shape, a jig is required for regulating the bent proximal ends.

In addition, as described above, products in which a knob is assembled to a conductive contact piece by caulking are likely to become loose at the caulked portion, and may fall off during use.

[Means for Solving the Problems] The ultra-compact switch according to the present invention has a conductive contact in which foot plate portions are respectively protruded from both sides of the base plate portion, and through holes are bored at predetermined positions in the base plate portion. The synthetic resin knob is formed by insert molding means into a seat plate portion formed on the front side of the conductive contact piece and a back side formed on the back side. at least the base plate portion of the conductive contact piece is sandwiched between a backing plate portion having a width narrower than the seat plate portion, and the seat plate portion and the backing plate portion are integrally formed at both ends of the through hole portion and the backing plate portion. The present invention is characterized in that the foot plate portion of the conductive contact piece is bent from the edge of the backing plate portion of the knob.

Furthermore, the present invention performs a punching process on a metal band plate, thereby forming a base plate portion, a foot plate portion and a connecting plate portion protruding from both sides of the base plate portion, and a through hole located approximately in the center of the base plate portion. 1. A seat plate portion formed on the surface side of the conductive contact piece by insert molding means of a synthetic resin material; The white plate portion of the conductive contact piece is held between a backing plate portion formed on the back side and narrower in width than the seat plate portion.

and a step of forming a knob having a structure in which the seat plate portion and the backing plate portion are integrally joined at the through-hole portion and both ends of the backing plate portion, and forming a foot plate portion of the conductive contact piece to the backing plate portion of the knob. The ultra-compact switch can be manufactured easily by the step of bending the edge using the edge as a fulcrum.

[Embodiment] Figs. 1 to 4 show a micro switch according to an embodiment of the present invention, and Figs. 5 to 7 show the manufacturing process, which is the same or similar to the above. The same reference numerals are given to the members.

That is, in FIGS. 1 to 4, a is a conductive contact piece, which includes a base plate portion 1, four foot plate portions 2 protruding from both sides thereof, and a connecting plate portion 3 to be described later.

It is formed by a through hole portion 4 bored in the base plate portion 1. b
is a knob made of synthetic resin material formed by insert molding means, 5 is a seat plate part, 6 is a protruding part, and 8 is a patch plate part, and the patch plate part 8 is narrower in width than the seat plate part 6. , is connected to the seat plate part 6 via the through hole part 4, and is also connected to the seat plate part 6 at both ends thereof. The four-legged plate portion 2 of the conductive contact piece a is bent into a U-shape using the edge of the backing plate portion 8 as a fulcrum.

To manufacture ultra-small switch components with the above configuration.

As shown in FIGS. 5 to 7, first, a thin hoop-shaped metal strip H is punched, and thereby the base plate portion 1
and four foot plate portions 2 protruding from both sides thereof, respectively.
A conductive contact piece a consisting of a connecting plate part 3 and a through hole part 4 for resin molding is continuously punched and formed through the connecting plate part 3 (see the left side of FIG. 5).

Next, a synthetic resin knob b is integrally molded onto the conductive contact piece a using an insert molding machine to be described later (fifth
(see FIG. 6 and the center part of FIG. 6), by this insert molding means, the seat plate part 5 with the projection part 6 formed on the front side of the base plate part forming the conductive contact piece a, and the seat plate part 5 with the protrusion part 6 formed on the back side. The through hole portion 4 and the backing plate portion 8 are connected at both ends of the through hole portion 4 and the backing plate portion 8 to form an integral structure (see the center portion of FIGS. 5 and 6).

Thereafter, using a press machine to be described later, the foot plate part 2 of the conductive contact piece a is bent into a square shape using the edge of the backing plate part 8 as a fulcrum (see the right side of FIG. 6), and the connecting plate part 3 is bent. Cut at the required parts to complete the switch parts.

FIG. 8 shows an example of an apparatus for manufacturing micro-sized switch components using the manufacturing method described above.

That is, 10 is a reel for forming a continuous conductive contact piece and inserting the metal strip H, 11 is a mold die of an insert molding machine, 12 is a synthetic resin material supply tank, and 13 is a press of a press machine for cutting and bending. A die, 14 is a product take-out chute, and 15 is a part of a cutter for the metal strip, which sends the formed metal strip H from a reel 10 to a mold 11 of an insert molding machine, where it is molded by insert molding of a synthetic resin material. 1 Synthetic resin knobs are sequentially integrally molded onto each conductive contact piece to make the switch component S□.Then, the foot plate is bent and the connecting plate is cut using a press machine 13, and the chute is formed. 14 as a switch product S3, and the cut strip H is guided to a cutter part 15, where it is cut to an appropriate length and disposed of.

[Effects of the Invention] As described above, according to the present invention, the conductive contact piece and the knob made of synthetic resin are integrally molded by insert molding means, so that the conductive contact piece and the knob are strong. This results in an ultra-compact switch that couples to the

Further, according to the method of the present invention, the number of manufacturing steps can be reduced and the quality and accuracy of the switch can be significantly improved compared to conventional methods for manufacturing micro-sized switches.

[Brief explanation of the drawing]

FIG. 1 is a side view of a micro switch showing an embodiment of the present invention, FIG. 2 is a bottom view, and FIG. 3 is a side view. Figure 4 is a longitudinal sectional view, Figure 5 is a plan view of the metal strip in the manufacturing process, Figure 6 is a sectional view, Figure 7 is a partial bottom view, Figure 8 is a side view of the manufacturing equipment, 9 is a plan view of a metal strip plate in a conventional manufacturing process, FIG. 10 is a sectional view, and FIG. 11 is a partial bottom view. H... Metal band plate, a... Conductive contact piece, 1... Base plate part, 2... Foot plate part, 3... Connection plate part, 4... Hole part, 5.・・Seat plate part. 6... Protrusion. 7...Short shaft part. 8... Back plate portion, 10... Reel, 11. Dog/mold mold, 12... Material supply tank. 13...Press mold, 14...Product removal chute. 15...Cutter part, S□...Switch parts, S2...Switch product.

Claims (2)

[Claims] (1) A conductive contact piece in which foot plate portions are respectively protruded from both sides of the base plate portion, and through holes are bored at predetermined positions in the base plate portion;
and a knob made of a synthetic resin material that supports this, and the knob made of the synthetic resin material is formed by insert molding means.
At least the base plate portion of the conductive contact piece is held between a seat plate portion formed on the front side of the conductive contact piece and a backing plate portion formed on the back side and narrower in width than the seat plate portion; The seat plate portion and the backing plate portion are configured to be integrally joined at both ends of the through hole portion and the backing plate portion, and the foot plate portion of the conductive contact piece is bent from the edge of the foot plate portion of the knob. Ultra-compact switch parts featuring (2) A metal strip is punched out, thereby forming a base plate part, a foot plate part and a connecting plate part protruding from both sides of the base plate part, and a through hole located at a predetermined location of the base plate part. A process of continuously punching and molding a conductive contact piece consisting of the above-mentioned connecting plate part, and a seat plate part formed on the front side of the conductive contact piece and a seat plate part formed on the back side by a synthetic resin insert molding means. The base plate portion of the conductive contact piece is sandwiched between a patch plate portion having a width narrower than the seat plate portion, and the seat plate portion and the patch plate portion are integrated at both ends of the through hole portion and the patch plate portion. A method for manufacturing an ultra-small switch component, comprising the steps of: forming a knob having a coupling structure; and bending the foot plate portion of the conductive contact piece using the edge of the backing plate portion of the knob as a fulcrum. .