JP2784169B2 - Double-sided contact type connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a substantially U-shaped metal plate as a backup plate and arranges conductive strips in parallel on the inner and outer surfaces thereof with an insulating layer interposed therebetween. The present invention relates to a double-sided contact type connector for surface mounting on a mounting wiring board, which serves as a means for connecting to a substrate.

[0002]

2. Description of the Related Art A material obtained by punching a contact from a metal plate and bending it has good elasticity, but has a problem in that the reduction of the cross-sectional area is limited and it is difficult to cope with high-density pitch and miniaturization. ing.

On the other hand, a structure in which a large number of conductive strips are formed in parallel on a surface of an insulating substrate by plating or the like can cope with high-density pitch and miniaturization, but has a problem that it is difficult to obtain required elasticity. .

[0004] This problem is a common problem inherent in a single-blade type connector that presses and contacts one side of a terminal portion of a connected component and a two-blade type connector that sandwiches a terminal portion of a connected component and presses and contacts both surfaces. Is a problem.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to increase the pitch of the contact means corresponding to the contacts in the single-blade type connector and the double-blade type connector and to provide a required elasticity. Is provided.

In particular, an object of the present invention is to provide a double-sided contact type connector having a structure advantageous as a connector mounted on a printed wiring board and connected to a double-sided wiring board to be connected.

[0007]

The above connector has a group of conductive strips connected to the double-sided wiring board to be connected, and has a structure in which this group of conductive strips is backed up by a metal plate.

That is, an insulating layer is formed on the surface of a metal plate, and a group of conductive strips for connecting to a large number of connected double-sided wiring boards are adhered in parallel on the surface of the insulating layer. The conductive strip group is embedded in the insulating layer so that its surface is exposed.

The metal plate is bent into a substantially U-shape having a pair of sandwiching pieces for sandwiching the double-sided wiring board to be connected, and extends the conductive strip group on the inner and outer surfaces of the sandwiching pieces. At one end of the one holding piece, a pressurized portion bent in a direction in which the double-sided wiring board to be connected is pushed is formed, and the end of the outer surface side conductive strip is formed on the outer surface of the pressurized portion. Distribute.

[0010] The end of the conductive strip on the inner surface side protrudes from the end of the metal plate to form a surface mounting terminal for the wiring board. Of the surface mounting terminals. Further, the metal plate forms a slit or a groove along an edge thereof, and an end of the conductive strip extends on a surface of the divided piece separated by the slit or the groove.

[0011] The elasticity of the connecting device is ensured by a metal plate for backing up the conductive strip, and the conductive strip can be made to have a high pitch and to be miniaturized without requiring the elastic strip to have its own elasticity.
In addition, the above connector is prepared by punching a group of conductive strips from a flat thin metal plate in parallel at a required pitch and attaching an insulating layer to the surface of a metal plate having a required thickness of the other side,
The connector can be easily formed by simply thermocompression bonding the above-described punched conductive strip group, and can be bent into a substantially U-shape to provide a connector having a structure capable of appropriately pressing and contacting the double-sided wiring board to be connected.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1A, a backup plate is formed of a rectangular metal plate 1 having a spring property such as phosphor bronze, and a thermoplastic insulating sheet is formed on both surfaces of the backup metal plate 1 by heat. Using a press device 2, thermocompression bonding (adhesion) is performed to obtain a base plate having an insulating layer formed on both surfaces of the metal plate 1 as shown in FIG. 1B.

On the other hand, as shown in FIGS. 1C and 1D, a thin metal plate 1 is used as a raw material to form a large number of conductive strips 4 which are punched out in parallel at a high density pitch. The thermoelectric compression bonding is performed by using a hot press device 2 or the like on the insulating layers 3 on both side surfaces of the conductive strip 4 shown in FIG. 1E.
Are arranged in parallel on both side surfaces of the metal plate via the insulating layer 3, and this is the basic structure of the connector.

As shown in FIGS. 1B and 1C, the parallel conductive strips 4 are punched in such a manner that one end or both ends protruding from the metal plate 1 are connected by a retainer 4d. The retainer 4d is cut off after the thermocompression bonding.

The parallel conductive strips 4 are embedded in the insulating layer 3 with their outer surfaces exposed by the thermocompression bonding.
Preferably, the parallel conductive strips 4 are embedded such that the outer surfaces thereof slightly protrude (dimension t) from the outer surface of the insulating layer 3. The parallel conductive strip 4 has a thin insulating layer portion 3a interposed between the parallel conductive strip 4 and the metal plate 1 in this embedded state.

As shown in FIG. 2, FIG. 3 or FIG. 5, a laminated body in which a group of conductive strips 4 is laminated on both surfaces of the metal plate 1 via an insulating layer 3 is sandwiched between a pair of wiring boards 5 to be connected. The conductive strip 4 is extended to the outer surface of the one holding piece 6a and the inner surface of the other holding piece 6a, and the double-sided wiring board 5 as a connected component is formed. To form a connector that sandwiches and makes pressure contact.

To restate, in the connector shown in FIGS. 2 and 3, the metal plate 1 is bent into a substantially U-shape to form a pair of opposing holding pieces 6a.
Is formed on the outer surface of one of the holding pieces 6a.
Is layered via the insulating layer 3, and another parallel conductive strip 4 is layered on the inner surface of the other holding piece 6 a via the insulating layer 3.

Further, the surface-mounting terminals protrude in parallel with each other by bending the ends of the parallel conductive strips 4 on the outer surface side from the connecting pieces 6b of the pair of holding pieces 6a so as to be substantially horizontal. 4b
Are formed, and the ends of the parallel conductive strips 4 on the inner surface side are projected from the edge of the other holding piece 6a in parallel by substantially equal dimensions, and this projected piece is used as a surface mounting terminal 4c.

In the above connector, one of the holding pieces 6a is surface-mounted on a wiring pattern of a wiring board (mother board) 7 via solder paste, and the double-sided wiring board 5 to be connected is inserted between the pair of holding pieces 6a. By sandwiching the substrate 5 between the sandwiching pieces 6a, the wiring patterns formed on both surfaces of the substrate 5 are brought into pressure contact with the respective parallel conductive strips 4 described above.
The surface mounting terminals 4b and 4c protrude so as to be at substantially the same level as the one holding piece 6a, and are used for surface mounting on the wiring board 7.

Further, a pressing portion 6c is bent at an end of one of the holding pieces 6a in a direction in which the double-sided wiring board 5 to be connected is pushed in, and the outer surface of the pressing portion 6c is An end is provided, and this is used as a pressure terminal 4a. Since the connector is to be surface-mounted on the mounting wiring board 7, the pressing portion 6c is attached to the end of the other holding piece 6a opposite to the one holding piece 6a attached to the surface of the wiring board 7. Form.

The end of the holding piece attached to the surface of the wiring board 7 projects forward of the pressing portion 6c, and the guide piece 6d
To form The double-sided wiring board 5 to be connected is the guide piece 6d.
While being guided by the pressure member 6c, smoothly inserted between the pair of holding pieces 6a by sliding on the curved surface of the pressing part 6c, and sandwiched between the pair of holding pieces 6a by the pressing by the pressing part 6c to form a double-sided wiring pattern. It makes sound pressure contact with the parallel conductive strips 4 on the inner and outer surface side.

As means for opening and closing the two holding pieces 6a,
An opening / closing shaft 8 extending in the width direction of the metal plate 1 is provided between the two holding pieces 6a, and a ridge portion 8a and a valley portion 8b are provided on a peripheral surface of the opening / closing shaft 8, so that the cross-sectional shape of the opening / closing shaft 8 is, for example, elliptical. The long side is a peak and the short side is a valley. By rotating the open / close shaft 8 in one direction as shown in FIG. 3A, the ridge 8a acts on the inner surfaces of both holding pieces 6a. This is set to an open state, and in this open state, the connected double-sided wiring board 5 is inserted and removed without load.

By rotating the open / close shaft 8 in the other direction as shown in FIG. 3B, the valley portion 8b and the inner surfaces of the two holding pieces 6a are opposed to each other, and the pressing is released to form a closed state.

As shown in FIGS. 4A and 4B, each of the parallel conductive strips 4 is buried in an insulating layer 3 formed on the surface of the metal plate 1 in a semi-buried state. It is exposed in a protruding state, and in this exposed portion, it comes into sound contact with the double-sided wiring board 5 as the connected component in a sound manner.

In FIG. 2, reference numeral 8c denotes an operation arm provided at an end of the opening / closing shaft 8, and the operation arm 8c is arranged at one end outside of the U-shaped bent metal plate 1.
The opening and closing operation to each position is performed.

Next, FIG. 5 shows another example of the connector bent into a clip shape.

In this connector, the parallel conductive strips 4 are arranged on the inner surface of the holding piece 6a attached to the wiring board 7, and the ends protrude from the edge of the metal plate 1 to form the surface mount terminals 4b. At the same time, the conductive strips 4 arranged in parallel on the outer surface of the other sandwiching piece 6a opposed thereto are extended from the connecting piece 6b to the outer surface of the one sandwiching piece 6a in close contact with each other. A surface mounting terminal 4c is formed, and both surface mounting terminals 4b, 4c
Accordingly, the connection device is surface-mounted on the wiring board 7.

The pressure terminal 4a and the surface mount terminal 4b,
In order to increase the elastic pressing effect of the metal plate 4c, as shown in FIG. 6, the metal plate 1 is formed with a cut or split groove 1a in parallel along the edge thereof and separated by the cut or split groove 1a. The ends of the conductive strips 4 extend in parallel on the surface of the divided piece 1b to form a pressure terminal. The slit or groove 1a is opened at the edge of the metal plate as shown in FIG. 6 or a connection piece is provided at the edge to make the metal plate closed.

In the case of the connector shown in FIGS. 2 and 3, the pressing portion 6c is formed by the divided piece 1b to back up the pressing terminal 4a.

[0030]

According to the above connector, the elasticity which was limited when the conventional metal plate punched contact was miniaturized is sufficiently ensured by the metal plate which backs up the conductive strip.
The conductive strips can be made denser and finer without requiring the elasticity of the conductive strips.

In the above connector, a group of conductive strips is punched out from a flat thin metal plate in parallel at a fine pitch, and this is thermocompression-bonded to a metal plate having a sufficient thickness and insulating layers attached to both surfaces of the metal plate. It can be easily manufactured only by doing.

A connector having a structure in which the above-mentioned laminate is bent into a shape sandwiching the double-sided wiring board to be connected and appropriately press-contacted with the double-sided wiring board to be connected can be formed with a high-density pitch of the contact terminals and a fine structure. Appropriate production can be achieved while at the same time.

[Brief description of the drawings]

FIG. 1A is a side view schematically illustrating a step of thermocompression bonding an insulating layer to a metal plate, FIG. 1B is a cross-sectional view illustrating a thermocompression-bonded laminated base plate, and FIG. FIG. 4 is a perspective view showing a punched body of a group of parallel conductive strips to be thermocompressed, D is a perspective view showing a punched body of a group of parallel conductive strips to be thermocompressed to the other surface of the laminated base plate, and E is the laminated body. It is sectional drawing which shows the state which laminated | stacked the base plate and each said parallel conductive strip group by thermocompression bonding.

FIG. 2 is a perspective view showing an example of a double-sided contact type connector formed by the laminate.

FIGS. 3A and 3B are cross-sectional views showing means for opening and closing the connector in FIG. 2 and an open / closed state;

FIG. 4A is a sectional view taken along line XX in FIG. 3A, and FIG.
FIG. 4B is a sectional view taken along line YY in FIG. 4A.

FIG. 5 is a sectional view showing another example of the double-sided contact type connector.

FIG. 6 is a perspective view of a main part illustrating an example of a structure that enhances elasticity of a contact portion of the connector.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 metal plate 1a cut or split groove 1b split piece 3 insulating layer 4 parallel conductive strip 4a pressurizing terminal 4b, 4c surface mounting terminal 5 connected double-sided wiring board 6a holding piece 6b connecting piece 6c pressing part 6d guide piece 7 mounting Wiring board 8 Opening / closing axis 9 Bump

Continuation of the front page (56) References JP-A-59-44779 (JP, A) JP-A-61-138479 (JP, A) JP-A-61-133511 (JP, A) JP-A-63-69171 (JP, A) JP-A-8-111267 (JP, A) JP-A-58-31676 (JP, U) JP-A-58-144775 (JP, U) JP-A-56-78185 (JP, U) JP-A 54-92360 (JP, U) Japanese Utility Model 3-128985 (JP, U) Japanese Utility Model Application No. Sho 61-100892 (JP, U) Japanese Utility Model Utility Model Utility Model No. 63-56581 (JP, U) Japanese Utility Model Utility Model No. 4-135183 (JP, U) U) Tokuhyo Hei 5-506743 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01R 23/02 H01R 9/09 H01R 23/00

Claims (2)

(57) [Claims] 1. A metal plate is bent into a substantially U-shape to form a pair of opposing holding pieces, and a parallel conductive strip is layered on an outer surface of one of the holding pieces via an insulating layer, and the other is sandwiched. Another parallel conductive strip is layered on the inner surface of the holding piece via an insulating layer, and one end of the outer surface side parallel conductive strip projects from the connecting piece of the pair of holding pieces while being separated from the mounting piece. A surface mounting terminal for the substrate is formed, and another end of the inner surface side parallel conductive strip protrudes from an edge of the other holding piece to form another surface mounting terminal for the mounting wiring board. A pressing portion bent in a direction in which the connected double-sided wiring board is pushed into the end portion of the holding piece is formed, and the other end of the outer surface side parallel conductive strip is disposed on an outer surface of the pressing portion. Holding the connected double-sided wiring board between the pair of holding pieces by pressing by the pressing portion. Sided contact type connector being characterized in that a configuration that allowed to each pressure contact the double-sided wiring pattern of the double-sided wiring board and the inner surface side parallel guide Denjo piece and the outer surface side parallel guide Denjo piece. 2. A metal plate is bent into a substantially U-shape to form a pair of opposing holding pieces, and a parallel conductive strip is layered on an outer surface of one of the holding pieces via an insulating layer. Another parallel conductive strip is layered on the inner surface of the holding piece via an insulating layer, and one end of the outer surface side parallel conductive strip is separated from the connecting piece of the pair of holding pieces to the outside of the other holding piece. A surface mounting terminal for the mounting wiring board is formed at the extending end, and an end of the inner surface side parallel conductive strip is projected from an edge of the other holding piece to extend the end. Another surface-mounting terminal for the mounting wiring board is formed, and a pressing portion bent in a direction in which the connected double-sided wiring substrate is pushed in is formed at an end of the one holding piece. The other end of the outer surface side parallel conductive strip is arranged on the surface, and the two connected members are pressed by the pressing part. The wiring board is sandwiched between the pair of holding pieces, and the double-sided wiring pattern of the double-sided wiring board is brought into pressure contact with the inner surface side parallel conductive strip and the outer surface side parallel conductive strip, respectively. Features a double-sided contact type connector.