JPH0569320B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention relates to a shield case that mutually shields multiple circuits such as a high frequency amplifier circuit and a local oscillator circuit in high frequency equipment such as an electronic tuner and a CATV converter; The present invention relates to a method of manufacturing the shield case.

(b) Summary of the invention The shield case according to this invention can be summarized as follows:
A supporting member that supports a plurality of terminals holds a fixing member formed in a part of the plate, and this fixing member is locked in a hole in the plate, thereby making the state in which the terminals are supported on the plate more robust. This is how it was done.

Further, in the method for manufacturing a shield case of the present invention, a support member made of a resin material is molded by outsert molding on a plurality of terminals and a fixing member that are molded by being connected to a plurality of plates by press working, and a support member of a resin material is formed by outsert molding. By bending the supporting member and the plate after cutting the connecting portion of the support member, the work is simplified, and the manufacturing cost is reduced by making effective use of the material.

(c) Conventional technology High-frequency equipment that handles high frequencies above the VHF and UHF bands is housed in a shield case to shield circuits such as high-frequency amplifier circuits and local oscillator circuits from each other. Furthermore, circuits that constitute high-frequency devices such as electronic tuners and CAT converters require multiple external lead-out terminals.

For this reason, conventionally, as shown in FIG. 4, a fixing member 103 made of resin material holding a plurality of terminals 104 is
, plate 1 constituting the shield case 101
It is locked to 02a. The terminal 104 is the support member 1
03 and is exposed inside the shield case 101, and this exposed portion is bent and connected to a circuit board housed within the shield case 101. A caulked portion 105 is formed in the plate 102a at a position where it is connected to both ends of the support member 103, and after the support member 103 is inserted into a hole (not shown), the caulked portion 105 is deformed toward the support member 103,
The support member 103 is locked by being sandwiched from both ends thereof.

As a method for manufacturing the conventional shield case as described above, the manufacturing method shown below is used.

As shown in FIG. 5A, plates 102a to 102d are formed by press working from a single flat metal plate to connect them to each other. At this time, the insertion hole 106 and the caulking part 105 are inserted into the plate 102a.
to form.

On the other hand, as shown in FIG.
4 are manufactured separately, and the terminals 104 are inserted into the support member 103.

The shield case 101 shown in figure A is bent into the shape of the case shown in figure C, and the insertion hole 10
6, the support member 103 supporting the terminal 104 is inserted.

Thereafter, the caulking portion 105 is caulked in the direction of the support member 103 as shown in FIG. As a result, the caulked portion 105 enters into the groove portions 103a formed at both ends of the support member 103, and the support member 103
will not come out from the insertion hole 106.

(d) Problems to be Solved by the Invention In the conventional shield case configured as described above, the support member made of resin material that supports the terminal has grooves 103a formed at both ends thereof and caulked portions 105 made of metal material. plate 102a by engagement with
is locked. That is, the terminal 104 is attached to the shield case 101 by contact between the support member 103 made of a resin material and the caulked part 105 made of a metal material. Therefore, the groove 103a of the support member 103
The vicinity is easily deformed by the force acting on the caulked portion 105. Therefore, if the relative position between the caulking part 105 and the groove part 103a is incorrect during caulking work, or if a force larger than necessary is applied, or if a large force is applied to the support member 103 or the terminal 104 during assembly work of high-frequency equipment. In case groove 10
The vicinity of 3a is deformed, and the groove part 103a and the caulked part 10
The contact condition with 5 may become poor. In this way, if the contact between the groove portion 103a and the caulked portion 105 becomes poor, the support member 103 may be removed from the plate 10.
Terminal 1 cannot be securely locked to terminal 2a.
There is a problem that the connection state between 04 and the board deteriorates.

Furthermore, in the conventional shield case manufacturing method described above, in addition to the plates 102a to 102d, the support member 103 and the terminal 104 must be manufactured separately, which increases the number of parts. Moreover, this means that an assembly operation is required to integrate the plates 102a to 102d, the support member 103, and the terminal 104, which complicates the manufacturing process.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, an object of the present invention is to fix a fixing member made of a metal material integrally formed on a plate to a supporting member, and to fix the supporting member to the plate by locking this fixing member to the plate. death,
An object of the present invention is to provide a shield case in which the terminal can be supported in a robust state by supporting the terminal through contact between a fixing member and a plate made of the same material.

In addition, by press-molding the terminal together with the plate into a single flat metal plate and outsert-molding the support member to the fixed member integrally molded to the terminal and plate, the number of parts and manufacturing steps can be reduced. An object of the present invention is to provide a method for manufacturing a shield case that can simplify work and reduce costs.

(e) Means for Solving the Problems The shield case of the present invention includes a plurality of plates press-formed from a single metal flat plate and a plurality of terminals, and the plurality of plates are bent at the connecting portion. It is a shield case that has four sides and has a plurality of terminals protruding from a plate that serves as a terminal mounting surface, with holes provided in two places on the plate that serves as the terminal mounting surface, and is press-molded integrally with the plate. , a fixing member that locks in the hole by bending, and a support member that supports a plurality of terminals and fixes the fixing member at both ends, and the fixing member is locked in the hole. The terminal is characterized in that the plurality of terminals protrude from the plate of the terminal mounting surface in the state.

Further, the method for manufacturing the shield case of the present invention includes:
A press process that connects and molds multiple plates from a single flat metal plate with multiple terminals and fixing members located at both ends of the terminal, and a resin support member that holds the multiple terminals and fixing members. outsert molding; and a bending step of cutting the connecting portions of the plurality of terminals, bending the fixing member together with the support member and the terminal, bending the plate, and locking the fixing member to the plate that serves as the terminal mounting surface; It is characterized by performing the following in order.

(f) Effect In the shield case of the present invention, holes are provided at two locations on the plate that serves as the terminal mounting surface.
When the plate is press-molded, a fixing member integrally formed with the plate is locked in the hole. In addition, a support member is provided that supports the plurality of terminals and fixes the fixing member at both ends, and allows the plurality of terminals to protrude from the plate on the terminal mounting surface with the fixing member locked in the hole. ing. Therefore,
The terminal and the support member are locked by engagement between a fixing member and a plate made of the same metal material.

Further, in the method for manufacturing a shield case of the present invention, the terminal and the fixing member are connected and molded simultaneously during press molding of the plate. Outsert molding is performed on the terminal and fixing member connected to this plate to form a support member. After the connection portion of the terminal is cut from this state, the fixing member including the terminal and the support member is bent together with the plate to form a shield case. in this way,
Throughout the entire process, multiple parts do not exist separately, and the number of parts is always one.

(g) Example Shield Case FIG. 1 is an external perspective view of a shield case that is an example of the present invention. Also, Figure 2 A to E
These are a plan view, a front view, a plan sectional view of the main part, a side sectional view of the main part, and a side sectional view of another main part of the shield case, respectively.

The shield case 1 is composed of plates 2a to 2d connected to each other at bent portions 7 and 8. The plates 2a to 2d are formed from a single flat metal plate by press working. A fixing member 5 is formed at one end of the bent portion 7. This fixing member 5 is formed by press working at the same time as the plates 2a to 2d. The fixing member 5 is partially fixed to both ends of the supporting member 3. The support member 3 is made of an insulating resin material, and has a plurality of terminals 4.
, and is located approximately at the center of the plate 2a. The terminal 4 passes through the support member 3, and both ends thereof are exposed to the outside and inside of the shield case 1. The terminal 4 is bent downward inside the shield case 1 and connected to a circuit board (not shown). Holes 6 are formed at both ends of the support member 3 in the plate 2a, and the fixing member 5 is fitted into the holes 6 from the inside of the plate 2a. The portion of the fixing member 5 exposed to the outside of the plate 2a is caulked. As a result, the fixing member 5 is locked in the hole 6.

Since a portion of the fixing member 5 that is engaged with the hole 6 of the plate 2a is fixed to both ends of the support member 3, the support member 3 is held in the center of the plate 2a. This holding state is the plate 2a of the fixing member 5.
The fixing member 5 is formed from the same flat metal plate as the plate 2a, and is connected to the plate 2a by a bent portion 7. Therefore, the fixing member 5 is fixed to the plate 2a, which is the same member, and there is no difference in hardness or expansion coefficient between the two, and the fixing member 5 is firmly fixed to the hole 6.

3. Method for manufacturing a shield case FIGS. 3A to 3E are diagrams showing a method for manufacturing a shield case according to an embodiment of the present invention. FIGS. 3A and 3B are plan views, and FIGS. It is an arrow sectional view taken in the arrow X direction.

First, plates 2a to 2d, terminals 4, and fixing members 5 are formed by press working from a single metal flat plate.
is punched out in the state shown in FIG. 3A. The plates 2a to 2d are connected to each other by bent portions 7 and 8, and a fixing member 5 is formed at the end of the bent portion 7. In addition, two bent portions 7
A terminal 4 is formed by being supported by a connecting portion 9 between the plates 2b and 2d and a connecting portion 10 between the plates 2b and 2d. Therefore, the terminal 4 and the fixing member 5 are molded inside surrounded by the plates 2a to 2d. Also, at this time, the plate 2a has a recess 11.
A hole 6 is formed.

A flat metal plate punched into the state shown in FIG. 3A by press working is guided into a mold to perform outsert molding. At this time, the vicinity of the center of the terminal 4 and the fixing member 5 are placed in the space between the upper mold and the lower mold.
This space is filled with resin.
As a result, a supporting member 3 made of a resin material is formed, which fixes the vicinity of the central portion of the terminal 4 and a portion of the fixing member 5. Thereafter, the connecting portions 9 and 10 are cut from the fixing member 5 and the plates 2b and 2d. Incidentally, the connecting portions 9 and 10 may be cut when the mold is clamped.

When the support member 3 is formed by outsert molding and the connecting portion 9 is cut, one end of the terminal 4 is bent in the direction of arrow A as shown in FIG. 3C.
Further, the terminal 4 is bent by 90 degrees in the direction of arrow A together with the support member 3 and the fixing member 5 to be in the state shown in FIG. 3D. After this, plates 2a-2d
is bent, and the terminal 4, support member 3, and fixing member 5 are bent at 90° with the bent portion 7 as the fulcrum, and further 90° with the intermediate portion between the bent portion 7 and the fixing member 5 as the fulcrum.
It is bent in the direction of arrow A. As a result, the fixing member 5 faces and fits into the hole 6 from the inside of the plate 2a. When the board 11 is housed inside the shield case 1 from this state, one end of the terminal 4 is engaged with the board 11. Furthermore, the portion of the fixing member 5 exposed to the outside of the shield case 1 from the hole 6 is caulked, and the fixing member 5 is locked in the hole 6.

As described above, according to this embodiment, the press working, outsert molding, and bending steps are successively performed, and the shield case 1 is manufactured from a single metal flat plate. During press working, the terminal 4 and fixing member 5 are formed inside the plates 2a to 2d, so the area of the flat metal plate consumed in manufacturing one shield case is the same as when only the plates 2a to 2d are pressed. It's no different. Therefore, the loss of the flat metal plate can be reduced without causing an increase in production costs.

(h) Effects of the Invention According to the shield case of the present invention, the fixing member, which is fixed to the support member and integrally press-molded with the plate, is secured to the hole provided in the plate to provide support. Since the member and the terminal are held by the plate, the terminal can be held by the fixing member having the same mechanical properties and the plate, and the holding state of the terminal can be maintained robustly.

Further, according to the method of manufacturing a shield case of the present invention, the terminal and the fixing member are press-molded from a single metal flat plate at the same time as the plate, and the supporting member is outsert-molded to the terminal and the fixing member. It is possible to reduce the number of parts prepared when manufacturing a case, improve productivity and reduce costs.

A more desirable manufacturing method is to use a metal flat plate as a hoop-shaped elongated material, and to continuously perform press working, outsert molding, and bending, which can dramatically improve productivity. Further, it is also effective to sufficiently improve productivity by forming the material into a strip shape corresponding to a plurality of shield cases and performing batch multi-processing.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a shield case that is an embodiment of the present invention, and Figs. 2 A to E are a plan view, a front view, a plan sectional view of the main part, and a side view of the main part of the shield case, respectively. FIG. 2 is a cross-sectional view and a side cross-sectional view of other important parts. Figures 3A to 3E are diagrams showing a method of manufacturing a shield case according to an embodiment of the present invention, in which Figures A and B are plan views, and Figures C to E are diagrams B
FIG. 2 is a sectional view taken in the direction of arrow X. Figure 4 is an external perspective view showing a conventional shield case, Figure 5A~
D is a diagram showing a conventional shield case manufacturing method. DESCRIPTION OF SYMBOLS 1... Shield case, 2a-2d... Plate, 3... Supporting member, 4... Terminal, 5... Fixing member, 6... Hole.

Claims (1)

[Claims] 1. A plurality of plates press-formed from a single flat metal plate and a plurality of terminals, the plurality of plates are bent at connecting portions to form four sides, and a terminal mounting surface and a plurality of terminals are provided. In a shield case having a plurality of terminals protruding from a plate, holes are provided at two locations on the plate serving as the terminal mounting surface, and a fixing member is press-molded integrally with the plate and locks into the holes by bending. , a support member that supports the plurality of terminals and fixes the fixing member at both ends, and with the fixing member locked in the hole, the plurality of terminals are removed from the plate on the terminal mounting surface. A shield case characterized by a protruding structure. 2. Pressing that connects and molds a plurality of plates from a single flat metal plate to a plurality of terminals and fixing members located at both ends of the terminals, and a support member made of a resin material that holds the plurality of terminals and fixing members. outsert molding, in which the connecting parts of multiple terminals are cut, and a bending process in which the fixing member is bent together with the supporting member and the terminal, the plate is bent, and the fixing member is locked to the plate that serves as the terminal mounting surface. , A method for manufacturing a shield case, characterized by performing the following in order.