JP2654551B2 - Manufacturing method of switch - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a switch including a switch body integrally formed with a coupler unit surrounding terminal units arranged in a plurality of stages.

[Prior Art] When a switch body is formed by covering an electrode plate having a plurality of terminal portions with a resin, and a coupler portion surrounding the periphery of the terminal portion is integrally formed with the resin, a hole or a hole is formed in the terminal portion. In general, notches are provided, and these are positioned in the resin, thereby strengthening the connection with the coupler portion to prevent the resin from coming off.

Also, in order to integrally mold the coupler portion, a slide mold must be used in addition to the upper and lower mating molds.

[Problems to be Solved by the Invention] When a slide die is used, the terminal portion is accurately positioned so as not to be displaced with respect to a moving direction of the slide die (hereinafter, referred to as a slide direction). There is a need.

Moreover, after the molding, the connection between the terminal portion and the coupler portion must be strengthened by some kind of retaining means.

In addition, it is necessary to position each electrode plate in the vertical direction. However, when a plurality of terminal portions are arranged in parallel, positioning is difficult if the terminal portions overlap vertically.

Accordingly, an object of the present invention is to provide a switch having a switch body capable of positioning in the sliding direction and preventing the switch from being pulled out, and a manufacturing method capable of easily performing vertical positioning during molding of the switch body. To provide.

[Means for Solving the Problems] A method of manufacturing a switch according to the present invention is directed to a switch having a plurality of terminals formed with a plurality of terminals and connected between adjacent terminals by bridges. A method of manufacturing a switch, wherein the switch body is provided side by side, and a slide mold is attached around one end of the terminal section, and then a resin body is injected into the mold to form a switch body having an integrated coupler section. Upon molding, a hole for positioning is provided in a portion overlapping the terminal portion vertically, and the bridge portions of the electrode plates are provided so as to be shifted in the moving direction of the slide die so that the upper and lower portions do not overlap each other, These electrode plates are inserted between the upper and lower dies, and the respective electrode plates are positioned in the respective positioning holes in the moving direction of the slide die. Each of the electrode plates is fitted with a plurality of vertical positioning members formed in a vertical direction at positions corresponding to the respective bridge portions of the upper and lower dies while fitting a sliding direction positioning member formed in the upper and lower molds. The bridge portion is supported, and in this state, the resin is injected into the mold to cover each of the electrode plates including the respective bridges with the resin, and thereafter, the bridge portion is cut off together with the coating resin. [Operation of the Invention] The switch body is provided with a positioning hole in a vertically overlapping portion of the terminal portion, and a positioning member in the sliding direction formed in the upper and lower molds is fitted into the hole, thereby displacing the position in the sliding direction. Is prevented.

Since each electrode plate is shifted in the sliding direction so that the bridge portion to be finally cut does not overlap vertically during molding, it is supported by a plurality of vertical positioning members respectively formed in the upper and lower molds. Thus, the vertical direction of each electrode plate is positioned.

Next, in this state, resin is poured into the mold, each electrode plate including each bridge is covered with resin, and then the upper and lower molds are opened and the slide mold is slid, so that the slide mold part is an integrated coupler part. The resulting resin molded product is taken out.

Then, when the bridge portion of this resin molded product is cut off together with the coating resin, a switch body is obtained.

[Embodiment] Figs. 1 to 9 show an embodiment of the present invention. The present invention is an example applied to the manufacture of a slide switch such as a heater control switch for an automatic company, and FIGS. 1 to 7 show the structure of the switch main body.

That is, the first electrode plate 20 and the second electrode plate 30 are integrally disposed on the upper and lower sides of the insulating switch body 10.

The switch body 10 has a coupler portion 11 integrally formed on one side, a through-pin hole 12 formed vertically in the vicinity of the coupler portion 11, and a cut hole 13 penetrating the front and back.
Are formed.

The center of rotation of a movable contact (not shown) is accommodated in the recess 14 formed at one end.

The first electrode plate 20 has a plurality of terminal portions 21 as shown in FIGS. 3 and 4, and each of the terminal portions has a pin hole 22 for horizontal positioning.

The periphery of the opening of the pin hole 22 is an annular wall 23 which is turned up to one side by burring.

Further, the terminals 21 are connected by bridges 24a and 24b. Each terminal section 21 is integrally connected to fixed contact sections 25, 26 and 27 to which a movable contact can selectively slide.

As shown in FIG. 4, each of the fixed contact portions 25, 26, and 27 and the terminal 21 has a bent step portion.

However, between the fixed contact portions 25 and 26 and the same as the fixed contact portion 25
27 are connected by bridge portions 28a and 28b. Reference numerals 25a and 27a in the drawings are pin holes for general insert positioning.

As shown in FIG. 5 and FIG. 6, the second electrode plate 30 has a plurality of terminal portions 31 each having a horizontal positioning pin hole 32 formed in the same manner as the pin hole 22.

An annular wall 33 formed by burring is formed on one side of the pin hole 32 as shown in FIG.

Note that adjacent terminal portions 31 are connected by bridge portions 34a and 34b.

In addition, each terminal section 31 has a fixed contact section via a step section 35.
It is formed integrally with 36, 37 and 38.

The fixed contact portions 36 and 37 are connected by a bridge portion 39. Reference numerals 36a and 38a in the drawings are pin holes for general insert positioning.

FIG. 7 shows a sectional structure of the cut hole 13,
In the switch body 10, a bridge portion 24b of the first electrode plate 20 is provided.
The exposed end surface of the second electrode plate 30 and the end surface of the bridge portion 34b of the second electrode plate 30 are also exposed.

Note that the positions of the bridge portions 24b and 34b are shifted stepwise up and down so that they do not overlap in the up-down direction.

Next, a method of forming the switch body 10 will be described. FIG. 8 shows a state at the time of molding, in which a pin-shaped first positioning member 51 is implanted integrally with the lower mold 50.

The first positioning member 51 corresponds to the positioning member in the sliding direction in the present invention, and is formed at a position corresponding to the pin holes 22 and 32 of the first electrode plate 20 and the second electrode plate 30.

Reference numeral 53 denotes an upper die to be combined with the lower die 50, and reference numeral 55 denotes a slide die for forming the coupler unit 11.

As shown in FIG. 9, a second positioning member 52 and a second positioning member 52 for supporting and positioning the bridge portions 24a and 24b and 34a and 34b (only the bridge portions 24b and 34b are visible in the figure) are provided. The third positioning member 54 is formed so as to protrude from each of the upper and lower mold surfaces while being shifted in the sliding direction.

These second and third positioning members 52 and 54 correspond to the vertical positioning members in the present invention, respectively.
The respective ends are bridge portions 24a and 34a and 24b and 3
It comes into contact with 4b.

Then, when the pin holes 22 and 32 of each electrode plate are fitted into the first positioning member 51 of the lower die 50, the respective positions in the sliding direction are determined, and at the same time, the second positioning member 52 is connected to the bridge portion 34b (34a). To determine the vertical position of the terminal.

When the slide mold 55 is closed in this state, each electrode plate 20 and
The fixed contact portions 25, 26 and 27 and 36, 37 and 38 which are one ends of the terminal portions 21 and 31 in
To support with an interval in the vertical direction.

Next, when the upper mold 53 is fitted, the third positioning member 54 comes into contact with the bridge portion 24b (24a).
30 vertical positioning is performed.

Subsequently, resin is injected into a space formed between the upper and lower dies 50 and 53 and the slide die 55 to perform predetermined molding.

At this time, each of the electrode plates 20 and 30 is connected to the first positioning member 5.
1. Since the vertical and sliding directions are determined by the second positioning member 52 and the third positioning member 54, molding is performed accurately.

After molding in this manner, first, when the slide die 55 is pulled out to the left in the drawing, the first electrode plate 20 and the second electrode plate
Since the position of the slide 30 is fixed by the first positioning member 51, the slide 30 is not pulled out together with the slide die 55 and the position in the slide direction is not shifted.

After that, the molded product is taken out and the bridge portions 24a, 24b, 34
When this portion is punched out from above a and 34b by press molding or the like and the bridge portions 24a, 24b and 34a, 34b are cut off, a cut hole 13 is formed penetrating vertically.

Since the annular walls 23 and 33 formed in the pin holes are cut into the resin, each electrode plate, especially the terminal 21
And 31 and the resin of the coupler portion 11 are strengthened.

[Effects of the Invention] According to the method of the present invention, a positioning hole formed in each electrode plate is fitted to a positioning member in the sliding direction, so that a displacement in the sliding direction can be prevented.

Therefore, even if the slide die is slid to close and open the die, the sliding direction of each electrode plate can be accurately positioned using the upper and lower dies.

Furthermore, since each electrode plate is shifted in the sliding direction so that the bridge portion to be finally cut does not overlap vertically during molding, it is supported by a plurality of vertical positioning members respectively formed in the upper and lower molds. By doing so, it is possible to reliably perform positioning in the up-down direction even if an overlapping portion is formed by arranging a plurality of electrode plates in parallel.

[Brief description of the drawings]

1 to 9 show an embodiment of the present invention. FIG. 1 is a plan view of a main part, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. , FIG. 4 is a side view, FIG. 5 is a plan view of a main part, FIG. 6 is a side view thereof, and FIG. 7 is a VII-V of FIG.
8 is a sectional view of a portion corresponding to FIG. 2 during molding, and FIG. 9 is a sectional view of a portion corresponding to FIG. 7 during molding. (Explanation of symbols) 10 switch body, 11 coupler section, 12 pin hole, 13 cut hole, 20 first electrode plate, 30 second
Electrode plates, 22, 32 ... Pin holes, 24a, 24b, 34a, 34b ...
Bridge part, 50 ... Lower mold, 51 ... First positioning member,
52: second positioning member, 54: third positioning member, 53: upper die, 55: slide die.

Claims (1)

(57) [Claims] An electrode plate formed with a plurality of terminal portions and connected between adjacent terminal portions by a bridge portion is provided in a plurality of stages, arranged in parallel between upper and lower molds, and slid around one end of the terminal portion. In a method of manufacturing a switch, in which a switch body is formed by integrating a coupler portion by injecting a resin into the mold after attaching a mold, a positioning portion is formed at a portion vertically overlapping the terminal portion when the switch body is molded. Are provided, and the bridge portions of the respective electrode plates are provided so as to be shifted in the moving direction of the slide die so that the upper and lower portions do not overlap with each other. Positioning portions in the sliding direction formed in the upper and lower dies for positioning the respective electrode plates in the moving direction of the sliding die in the holes for use. A material is fitted, and the bridge portions of the respective electrode plates are supported by a plurality of vertical positioning members formed to project in the vertical direction at positions corresponding to the respective bridge portions of the upper and lower molds. A method of manufacturing a switch, comprising: injecting a resin, covering each of the electrode plates including the respective bridges with a resin, and thereafter cutting off the bridge portions together with the covering resin.