JPH08250250A - Manufacture of small jack - Google Patents

Abstract

PURPOSE: To provide a method for mass-producing a small jack at low cost. CONSTITUTION: A plurality of lead terminal parts 2a, 2b, 3 are formed in hoop in a metal plate with a transfer press, then the lead terminal parts 2a, 2b, 3 and a resin mold are integrally combined by continuous hoop insert molding to produce a plurality of molded parts 4. A contact is inserted into each molded part 4 by applying pressure, then a shield frame is press fitted onto them by applying pressure to complete a jack.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a jack used as an electric / electronic component, and more particularly to a method for manufacturing a small jack.

[0002]

2. Description of the Related Art In the case of electrically connecting individual parts such as electric / electronic parts or semiconductor devices to other parts or assembling an electric circuit using them, in addition to direct wiring by soldering, jacks Is often used. The advantage of using a jack is that it is easy to change the connection between individual parts when inspecting or replacing individual parts and electric circuits,
As a result, it is possible to easily open and close the electric circuit.

In recent years, with the miniaturization of electric / electronic parts, there has been an increasing demand for miniaturization of jacks for electric / electronic parts. The conventional jack manufacturing method is It had the following problems.

A conventional method for manufacturing a jack of a commonly used size is to fix a metal piece to be a lead terminal portion, which is an inlet / outlet of one current, and an inserted pin to a resin mold. A metal piece serving as a contact portion having elastic characteristics and a metal piece serving as a ground portion or a shield frame portion serving as the other current inlet / outlet, which are a total of three metal pieces, are individually fitted and assembled as a product.

In this method, all the individual parts are supplied in a disassembled state, and they are manually assembled into a product. However, when the size of each component is about 5 mm or less, it is difficult to handle by hand, so that the work efficiency may be extremely reduced, or the assembly itself may be impossible in some cases. As described above, since the manufacturing cost of the small jack is high, the product itself has to be expensive.

Recently, a method using an automatic assembling apparatus using an assembling robot has also been adopted. However, in this method, since the assembling work is performed by using several kinds of parts having different shapes, the process and operation become complicated, The assembly apparatus itself was complicated and expensive. Furthermore, there has been a vicious circle in which a more precise and therefore more expensive device is required to manufacture a small jack using this automatic assembly device.

Therefore, in order to cope with the miniaturization of electric / electronic parts, it has been desired to develop a jack manufacturing method capable of mass-producing small jacks at low cost.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a method for mass-producing a jack, particularly a small jack, at low cost.

[0009]

In order to achieve this object, a method of manufacturing a jack according to the present invention comprises a step of continuously forming a plurality of lead terminal portions into a hoop shape by continuous pressing, and a continuous hoop insert molding method for forming the leads. The method includes a step of integrating the terminal portion and the resin mold to form a plurality of molded products, and a step of press-fitting the contacts and the shield frame into the plurality of molded products.

First, a metal plate is subjected to continuous press working to form a plurality of metal pieces to be lead terminals into a hoop shape. Then, the lead terminal portion is integrally molded with the synthetic resin mold by continuous hoop insert molding to obtain a molded product. Since this molded product is supplied to the subsequent process in a continuous hoop shape, it is possible to supply a large number of contacts at a time by supplying it to the assembling device with the contacts formed in the hoop shape with the same pitch as the pitch between the molded products. It is possible to press. After the contact is press-fitted into the molded product, the shield frame is further press-fitted to complete the jack. If this shield frame is also formed into a hoop shape, it becomes possible to press fit a plurality of shield frames into the molded product at the same time.

[0011]

In the method of manufacturing the jack according to the present invention,
The lead terminal pressed in the hoop shape is processed into a resin molded product by insert molding. Therefore, in the conventional method, the step of individually supplying the lead terminal piece and the resin molded product and integrating them is indispensable, but such a step can be omitted in the method according to the present invention. .

Further, the contact portion, and in some cases, the shield frame portion is pressed while keeping the hoop shape and is supplied to the assembling apparatus, so that a large number of contacts and the shield frame are press-fitted and assembled at one time. It is possible to mass-produce small jacks at low cost, which was difficult by hand. The method for manufacturing a jack according to the present invention can be applied to a jack of a size that is normally used, other than a small jack.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show stepwise a method of manufacturing a jack according to the present invention. First, as shown in FIG. 1, a strip-shaped metal plate 1 is punched out by continuous press working to obtain lead terminal portions 2a, 2 having a predetermined shape.
Form b and 3. Thereafter, as shown in FIG. 1, the pair of lead terminal portions 2a and 2b are bent perpendicularly to the metal plate 1 so as to face each other. The lead terminal portion 3 is
A pair of lead terminal portions 2a, 2b whose surfaces face each other
Is bent perpendicularly to the metal plate 1 so as to be perpendicular to the respective surfaces.

Then, as shown in FIG. 2, the lead terminal portions 2a, 2b, 3 formed in the hoop shape are integrated with the resin molding portion by continuous hoop insert molding to mold a molded product 4. The molded product 4 is composed of an upper part 4a and a lower part 4b. The upper part 4a has a cylindrical shape with a diameter of 3 mm, and the lower part 4b has a square shape with a side of 4 mm. A recess 5 having a size such that the contact 5 can be inserted therein is provided substantially in the center of the upper portion 4a. Lower part 4b
Is provided with a notch 6 extending from one side to the opposite side.

The lead terminal portions 2a, 2b, 3 are located inside the recess 5 such that the vertically bent portions are exposed. After the molded product 4 is molded, a plurality of hoop-shaped contacts 7 are simultaneously pressed into the recesses 5. At the time of this press-fitting, as shown in FIG. 4 (A), the side surface of the leg portion 8 of the contact 7 is sandwiched between the lead terminal portions 2a and 2b exposed inside the recess 5, and the contact is made. The elastic portion 9 functioning as a contact spring of 7 is kept in contact with the lead terminal portion 3 exposed inside the recess 5.

As shown in FIG. 2, if the pitch between the molded products 4 and the pitch between the contacts 7 are set to be the same, a plurality of contacts 7 are pressed into the molded product 4 at the same time. It is possible to After press-fitting the contact 7 into the recess 5, as shown in FIG.
The carrier portion 10 of the contact 7 is bent and separated by utilizing the notch portion 11 provided in the carrier portion.

Next, as shown in FIG. 3B, the shield frame 12 is fitted onto the outer periphery of the molded product 4 from above. A rectangular hole 13 is provided on the outer peripheral surface of the shield frame 12, and the hole 13 is used to form the molded product 4
The shield frame 12 is fixed to the outer periphery of the molded product 4 by being fitted into the projection 14 provided on the outer periphery of the. The assembly is completed by fitting the shield frame 12 on the outer periphery of the molded product 4 (FIG. 3 (C)).

After the assembly is completed, as shown in FIG. 3D, the carrier portion 15 of the metal plate 1 which connects the lead terminal portions 2a, 2b and 3 in a hoop shape is cut by an appropriate method. , Individual products are completed.

In this embodiment, as described above, the molded product 4 and the contacts 7 are supplied in the hoop state, and a plurality of contacts 7 are simultaneously supplied to the molded product 4.
However, it is also possible to supply the shield frame 12 in a hoop state in the same manner and to fit a plurality of shield frames 12 into the molded product 4 at the same time.

FIGS. 4A and 4B are sectional views showing a state in which a coaxial cable is connected to the jack according to this embodiment. Before the coaxial cable is inserted, the jack has the lead terminal portions 2a and 2b as shown in FIG. 4 (A).
Is connected to the lead terminal portion 3 via the contact 7. When the contact pin 16 of the coaxial cable is inserted into the jack in this state, the elastic portion 9 of the contact 7 is pushed toward the lead terminal portions 2a and 2b by the contact pin 16 as shown in FIG.
The connection between the lead terminal portions 2a and 2b and the lead terminal portion 3 is released via. Instead of this, the lead terminals 2a and 2b and the contact pin 16 through the contact 7 are provided.
A connection with is formed. When the contact pin 16 is inserted, the outer sleeve 17 of the coaxial cable is fitted to the shield frame 12 on the outer peripheral side of the shield frame 12.

As described above, in the jack manufacturing method according to this embodiment, it is possible to economically mass-produce small jacks by using the continuous hoop insert molding method. Although the contact 7 is first press-fitted into the recess 5 of the molded product 4 and then the shield frame 12 is press-fitted in the present embodiment, the shield frame 12 may be first press-fitted. .

[0022]

According to the jack manufacturing method of the present invention, it is possible to mass-produce a small jack at a low cost, which has conventionally been difficult by hand or required an expensive automatic assembly machine. Become.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a lead terminal portion is formed into a hoop shape by continuous pressing.

FIG. 2 is a perspective view showing a process of simultaneously press-fitting contacts into a molded product formed by integrally forming a lead terminal portion and a resin mold with a continuous hoop insert.

FIG. 3A shows a process of disconnecting a contact,
(B) shows the process of press-fitting the shield frame,
(C) shows a state where the assembly is completed, and (D) is a perspective view showing a process of dividing into individual products.

4A is a cross-sectional view of a jack manufactured by the method according to the present invention, and FIG. 4B is a cross-sectional view when a coaxial cable is connected to the jack shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal plates 2a, 2b, 3 Lead terminal part 4 Molded product 5 Recessed part 6 Notch 7 Contact 8 Leg part 9 Elastic part 10 Carrier part 11 Notch part 12 Shield frame 13 Hole 14 Protrusion 15 Carrier part 16 Contact pin 17 Outer cylinder sleeve

Claims (3)

[Claims] 1. A process of continuously molding a plurality of lead terminal parts into a hoop shape by a continuous press, a process of integrating the lead terminal parts and a resin mold by continuous hoop insert molding to form a plurality of molded products, A method for manufacturing a jack, comprising a step of press-fitting a contact and a shield frame into a plurality of molded products. 2. The contact is formed by a continuous press into a hoop shape, and the contact is press-fitted into the plurality of molded products in a hoop-like shape, and after cutting each contact, the shield frame is press-fitted. The method for manufacturing a jack according to claim 1, wherein the jack is a product. 3. The shield frame is formed by a continuous press into a hoop shape, and after the contacts are press-fitted into the plurality of molded products, the shield frame is press-fitted into the plurality of molded products in a hoop shape. The method for manufacturing a jack according to claim 2, wherein