JPH0212701Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a new jack.

In many conventional jacks, each contact piece is assembled into the body by means of fitting or engagement, which is difficult to automate and relies heavily on manual work. For this reason, manufacturing costs and management costs are high, and accuracy may vary depending on the skill level of the operator, contact failure may occur due to damage or dirt on the plated surface of the contact piece, and there may be problems with long-term use. There is a risk that the contact piece may become loose, etc.
Various problems arose.

This invention was made in view of such problems,
The object of the present invention is to provide a high-precision jack that can be mass-produced efficiently and inexpensively on the same automated line without requiring any manual work.

That is, in order to achieve the above object, the present invention has a movable contact piece on one side and a fixed contact piece on the other side by punching an electrically conductive metal plate.
forming their bases to be joined to each other,
The base portion is buried during molding of the electrically insulating body, the fixed contact piece is made to protrude from the wall surface of the body, and the movable contact piece is made to protrude from the wall surface of the body and is attached to the fixed contact side. It is configured so that it can be bent and moved into and out of contact with the fixed contact piece.
A cutting tool insertion hole is formed in the body at a position where the joint part of the base part is buried, and the joint part is cut by the cutting tool inserted through the cutting tool insertion hole, and the joint part is fixed through the base part. The contact piece and the movable contact piece cannot be energized, and this will be explained in detail below using examples.

This embodiment shows a DC jack; FIG. 1 is a sectional view, and FIG. 2 is an exploded perspective view, in which 1 is an electrically insulating jack made of a molding material such as plastic. A body, 2 a movable contact piece, 3 a fixed contact piece, 4 a pin, and 5 a pin terminal.

The body 1 is configured in an L-shape and has a rear wall 11.
A pin insertion hole 12 is formed approximately in the center of the
A pair of protrusions 13 are provided at the lower end of the back surface of the rear wall 11 to prevent the pin terminal 5 from unexpectedly rotating when the pin terminal 5 is attached to the rear wall 11. And horizontal base wall 1 of this body 1
4 is formed with a hollow cavity 15 for allowing bending of the fixed contact piece 3 and movement of the movable contact piece 2, and furthermore, a pair of cutting tool insertion holes 1 are formed in front of the hollow cavity 15.
6 and 16 are formed.

The pin 4 has a collar 41 externally fitted and fixed approximately in the center, and the cylindrical portion 42 behind the collar 41 is inserted into the pin insertion hole 12 in the body rear wall 11 and the pin insertion hole 51 in the upper part of the pin terminal 5 on the back side thereof. The pin terminal 5 and the pin terminal 5 are fixedly attached to the rear wall 11 of the body by inserting the pin terminal 5 into the cylindrical portion 42 and caulking the opening edge 43 of the cylindrical portion 42 .

As shown in FIGS. 3 and 4, the movable contact piece 2 and the fixed contact piece 3 are made of electrically conductive metal in the state of an integral body in which both base parts 21 and 31 are connected to each other and are embedded in the body 1. The body 1 is formed by punching out the plate 6 and providing a layer of conductive material such as a silver plating layer on the surface, and inserting this integrated body into a body molding die and injecting the molding material. At the same time as forming the base 2 of both contact pieces 2 and 3.
1 and 31 are embedded and firmly attached to the horizontal base wall 14 of the body 1, and as shown in FIG. 4, the tongue-like portion 22 of the movable contact piece 2 is The movable contact piece terminal portion 23 and the fixed contact piece terminal portion 33 protrude from the left and right side wall surfaces of the body 1, respectively, and the U-shaped portion 32 of the fixed contact piece 3 extends from the hollow cavity 15 of the body 1. The connecting portions 7, 7 of the movable contact piece 2 and the fixed contact piece 3 protrude from the wall surface, and further traverse the cutting tool insertion holes 16, 16 of the body 1. After embedding in this manner, the connecting portions 7, 7 of the movable contact piece 2 and the fixed contact piece 3 are cut using a cutting tool (not shown) inserted through the cutting tool insertion holes 16, 16, and the base 21, 31 so that no current can be passed through the metal plate 6, and use another cutting tool to cut unnecessary parts 61 and 62 of the metal plate 6 shown by hatching in FIGS. 3 and 4, and then as shown in FIGS. The tongue-shaped portion 22 of the movable contact piece 2 is bent into a mountain shape to form a plug contact portion 24 and a tip contact portion 25,
The tip contact portion 25 of the movable contact piece 2 is brought into elastic contact from below with the tip contact portion 35 formed by bending the U-shaped portion 32 of the fixed contact piece 3 upward at a right angle. At the same time, the movable contact piece terminal portion 23 and the fixed contact piece terminal portion 3
3 is also bent downward at a right angle.

In such a jack, when a plug is inserted into a plug insertion hole formed in a jack mounting member such as a cabinet, the pin 4 is inserted into the hole of the plug and the plug is inserted into the plug contact portion 24 of the movable contact piece 2. The pin 4 and the movable contact piece 2 are energized by pressure contact, and at the same time, the movable contact piece 2 is pushed downward by the plug, and the movable contact piece 2
The tip contact portion 25 of the fixed contact piece 3 is the tip contact portion 35 of the fixed contact piece 3.
As the distance increases, power is cut off.

Although the above embodiment is constructed as a DC jack, it is also possible to use a type in which a plurality of these jacks are arranged in parallel, and it goes without saying that if a larger number of jacks are arranged in parallel, it becomes a so-called multiple jack.

As can be understood from the above description, the jack of the present invention has a movable contact piece 2 on one side by punching the electrically conductive metal plate 6.
, the fixed contact piece 3 on the other side, their base 21,
31 are connected to each other, and the base 2
1 and 31 are embedded in the electrically insulating body 1 during molding, the fixed contact piece 3 is made to protrude from the wall surface of the body 1, and the movable contact piece 2 is made to protrude from the wall surface of the body 1. The body 1 is provided with a cutting tool at a position where the connecting portion 7 of the base portions 21 and 31 is embedded. An insertion hole 16 is formed, and a cutting tool inserted through the cutting tool insertion hole 16 cuts the coupling portion 7.
is cut off, making it impossible to conduct electricity between the fixed contact piece 3 and the movable contact piece 2 through the bases 21 and 31.
The conventional process of manually assembling the contact piece into the body is completely unnecessary, and the process of punching out the contact piece, forming the body, bending the contact piece, etc. on the same automated line is done at low cost. Can be manufactured continuously with high efficiency. Moreover, if the bases 21 and 31 of the movable contact piece 2 and the fixed contact piece 3 are buried and firmly attached during molding of the body 1, it will be difficult to assemble the contact pieces by manual fitting or engagement. This eliminates the risk of variations in accuracy, looseness of the contact piece during long-term use, and contact failure due to damage or dirt on the plated surface of the contact piece. If the fixed contact piece 3 is cut and separated after being buried in the base, the mutual positional relationship of both contact pieces 2 and 3 will always be constant, and the accuracy will be further improved.

As described above, the present invention has many remarkable effects and is extremely practical.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is an exploded perspective view of the same embodiment, Fig. 3 is a partial plan view of a metal plate on which a movable contact piece and a fixed contact piece are formed by punching, and Fig. FIG. 4 is an explanatory view of the state after the body molding process has been completed. 1... Body, 6... Metal plate, 16... Cutting tool insertion hole, 2... Movable contact piece, 3... Fixed contact piece, 2
1, 31...base, 4...pin, 5...pin terminal, 7...coupling part.

Claims (1)

[Scope of utility model registration request] By punching an electrically conductive metal plate, a movable contact piece is formed on one side and a fixed contact piece is formed on the other side, with their bases connected to each other, and the base is electrically insulated. At the same time, the fixed contact piece is made to protrude from the wall surface of the body, and the movable contact piece is made to protrude from the wall surface of the body and is bent to the side of the fixed contact piece. The body is configured to be able to come into contact with and separate from the fixed contact piece, and a cutting tool insertion hole is formed in the body at a position where the connecting part of the base is buried, and the cutting tool inserted through the cutting tool insertion hole is inserted into the body. A jack characterized in that the above-mentioned joint portion is cut, making it impossible to conduct electricity between the fixed contact piece and the movable contact piece through the base portion.