JP4430487B2 - Face-to-face connector - Google Patents

Description

  The present invention relates to a connector for connecting a circuit board such as a flexible printed wiring board to another electric circuit, and in particular, can be mounted with a large area, can be miniaturized, and can have a long line length, so that a high frequency can be obtained. The present invention relates to a connector capable of obtaining characteristics.

  1 to 7 of Patent Document 1 shown below describe a connector for connecting a flexible conductor such as a flexible printed wiring board and a printed board as a circuit board. The connector described in Patent Document 1 includes a substantially U-shaped contact pin and a housing provided on the printed circuit board, which is the circuit board, to which the contact pin is mounted. A plurality of the contact pins are provided, and are arranged in a row at a predetermined interval in the lateral direction with respect to the housing. The contact pin is formed with a contact extending toward the upper side of the housing and an external connection portion extending toward the rear of the housing. The external connection portion is connected to the circuit surface of the printed board by soldering. In addition, the housing is formed with an insertion port in which a bowl-shaped housing receiving portion is formed at the top.

  On the other hand, an insertion end portion to which a reinforcing plate is attached is formed at the distal end of the flexible conductor, and a conductor line is exposed on the back surface of the insertion end portion.

  In the connector described in Patent Document 1, the insertion end of the flexible conductor is inserted into and fitted into the insertion port formed in the housing, and the housing receiving portion is directly or indirectly connected to the difference. Press the upper surface of the insertion end. At this time, the contact protrusion formed on the side of the insertion port covers the insertion end, and the insertion end is locked in the insertion port.

  When the insertion end is fitted and locked in the insertion port, the housing receiving portion directly or indirectly presses the upper surface of the insertion end, so that the insertion end is inserted into the insertion end. The contact between the flexible conductor and the connector is securely locked to the opening and the contact formed on the contact pin is pressed against the conductor line exposed on the back surface of the insertion end. It is possible to improve the connection.

When the flexible conductor is connected to the connector in this way, an electric circuit is formed from the flexible conductor through the contact point and the external connection portion of the contact pin and to the circuit surface of the printed board.
JP 7-335342 A

  However, in the connector described in Patent Document 1, the contact pins serving as terminals for connection to a flexible conductor or a circuit board are arranged in only one row in the lateral direction with respect to the housing. Therefore, in order to provide a large number of the contact pins, it is necessary to enlarge the connector itself, and there is a limit to increasing the number of connection terminals (contact pins) while maintaining a certain size.

  Moreover, in the connector described in the said patent document 1, although the front-end | tip part of the said flexible conductor, ie, an insertion end part, is pressed by the said housing receiving part, the said housing receiving part is located above the said inserting end part. Therefore, the thickness dimension of the connector is increased by the thickness dimension of the housing receiving portion.

  Therefore, while increasing the number of the contact pins serving as connection terminals, the flexible conductor is securely locked to the housing, and the entire connector is maintained while maintaining a good connection between the flexible conductor and the contact pins serving as the connection terminals. Cannot be downsized.

The contact pin has a substantially U-shaped structure, and a distance from the contact point that is a connection point with the flexible conductor to the external connection part that is a contact point with the circuit board is long. Therefore, the line length in the connector becomes long, and high frequency characteristics cannot be improved.
Further, when one flexible conductor and the other flexible conductor are directly connected, it is necessary to use a substrate provided with two conventional connectors, which is complicated and difficult to reduce in size and thickness.

  The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a connector that can increase the mounting area, can be miniaturized, and has good high-frequency characteristics.

  It is another object of the present invention to provide a connector suitable for miniaturization and thinning with a simple configuration when connecting flexible conductors.

According to the present invention , a substrate having a first surface and a second surface, and a plurality of the first surface and a plurality of arrays spaced from each other in two directions orthogonal to each other and elastically deformable are raised from the first surface. A plurality of spiral contacts , a plurality of connection terminals provided on the second surface facing the contacts and electrically connected to an external circuit board, and penetrating the board And a plurality of conducting portions for conducting the respective contacts and the connection terminals ,
The substrate, and a housing in which a plurality of wiring member engaging member is fixed to the other surface has an external connection portion facing the contact on one surface is attached,
The housing is formed with an opening that opens toward the bottom, a first locking portion that fits the substrate, and a second locking portion that fits the fitting member,
The board is positioned by being locked by the first locking portion in a state where the plurality of connection terminals are exposed from the opening toward the bottom, and the fitting member is positioned by the second locking portion. when it is engaged in, characterized in that said contact with the external connection portions are opposed individually, the contactor and the the external connection portion and the contact are compressed deformation is electrically conductive It is what.

  In the connector according to the present invention, a plurality of the contacts formed on the substrate and the external connection portions formed on the wiring board are arranged in a planar matrix. Accordingly, since a large number of the contacts and the external connection portions can be formed, the mounting area can be increased, and the connector can be substantially reduced in size.

  Further, since the fitting portion to which the substrate and the wiring board are fixed is mounted in the housing, the thickness dimension of the connector can be accommodated in the thickness dimension of the housing. Therefore, it is possible to obtain a connector with a reduced thickness.

  In the connector of the present invention, the current supplied from the wiring board flows from the one contact formed on the upper surface of the substrate to the connection terminal or the other contact formed on the lower surface of the substrate. Due to the structure, it is not necessary to form a conductive path for guiding a current flowing out from the contact on the same surface as the upper surface or the lower surface on which the contact is formed. Accordingly, it is possible to easily prevent a short circuit and to facilitate manufacture.

Since the pre-Symbol fitting member can be reliably locked in the housing, circuit board and makes it possible to the substrate mounted on the lower reliably electrically connected.

Further, if the contact is configured in a spiral shape, it is possible to improve the electrical connection with the external connection portion formed on the wiring board, and the line length can be shortened, so that the electrical resistance at the connector is reduced. And high-frequency characteristics can be improved.

  For example, the predetermined rule may be a planar matrix, but may be other arrangements in consideration of mounting density and the like.

  Moreover, the said wiring board can be comprised as what is a flat cable or a flexible printed wiring board.

  In the connector of the present invention, a plurality of contacts are arranged in a matrix on the upper surface (first surface) of the substrate. In addition, a plurality of external connection portions formed on the lower surface (second surface) of the wiring board are also arranged in a matrix.

  Therefore, in the connector of the present invention, it is possible to provide a large number of the contacts and the external connection portions, and the mounting area can be increased. As a result, the connector can be substantially reduced in size.

  In the connector according to the present invention, the current supplied from the wiring board flows from the contact formed on the upper surface of the substrate to the connection terminal formed on the lower surface of the substrate. It is not necessary to form a conductor wire for guiding the current flowing out from the contact on the same surface as the upper surface on which is formed. Accordingly, it is possible to easily prevent a short circuit and to facilitate manufacture.

  The fitting member to which the wiring board is fixed is inserted into the housing. Therefore, it is possible to reduce the thickness of the entire connector.

  In addition, since the wiring boards can be connected to each other with a simple configuration, a facing connector suitable for miniaturization and thinning can be provided in this respect.

Figure 1 is an exploded perspective view showing an implementation form of the connector of the present invention. The connector 1 shown in Figure 1 that the contact-forming surface each other of the substrate to be described later and an external connecting portion forming surface of the wiring board is a wiring member is opposed to the substrate and the external connection formed on the wiring board It is a face-to-face connector configured to be electrically connected to the formed contact.

The connector 1 includes a housing 2 and the substrate 3 is configured and a flexible printed wiring board 4 is a wiring board.

As shown in FIG. 1, the housing 2 includes a top surface (the surface shown Z 1 direction) 2a which is a first surface, a lower surface engagement portion 2c that communicates the (the Z2-side surface) 2b is Is formed.

The substrate 3 has an upper surface 3a that is a first surface and a lower surface 3b that is a second surface. FIG. 2 is a sectional view of the substrate 3 taken along the line II-II shown in FIG. As shown in FIGS. 1 and 2, the spiral contacts 20 of the multiple is formed on the upper surface 3a of the substrate 3. FIG. 3 is a perspective view of the spiral contact 20. As shown in FIG. 3, a plurality of the spiral contacts 20 are formed on the upper surface 11 b of the base 11 with predetermined intervals in the X direction and the Y direction shown in the figure. The spiral contact 20 is configured such that the contact is formed in a spiral shape, and the upper surface 3a has a predetermined rule, for example, a matrix shape (lattice shape or grid-like shape) with a predetermined interval in the X direction and the Y direction shown in the figure. ). It should be noted that the arrangement of the spiral contacts 20 is not limited to a matrix, and may have other arrangement structures.

  As shown in FIG. 2, the base 11 is formed with a hole (through hole) 11 a that communicates the upper surface and the lower surface. A conductive portion 30 made of a conductive material is formed on the inner surface of the hole portion 11a.

  In addition, the said base 11 can use what mixed the glass fiber in the epoxy resin, for example.

  The spiral contact 20 has a base 21, and a winding start end 22 of the spiral contact 20 is provided on the base 21 side. A winding end 23 is formed extending in a spiral shape from the winding start end 22.

  Each spiral contact 20 shown in FIG. 3 is three-dimensionally formed into a conical shape protruding upward (Z1 direction in the drawing) so that the vicinity of the winding end 23 protrudes highest.

  The spiral contact 20 can be formed of, for example, a material such as Cu, Ni, Au, etc. In addition to those composed of a single layer from these materials, a stack of Cu and Ni, a stack of Ni and Au, etc. A plurality of materials may be laminated. The spiral contactor 20 can be manufactured by plating each of the materials.

  The spiral contactors 20 are connected to each other between bases 21 by a joining member 32. The joining member 32 is provided with a hole 32 a that is slightly larger than the spiral contact 20. The hole 32 a is aligned with the spiral contact 20, and the base 21 of the spiral contact 20 is aligned. The joining member 32 is affixed on top. The joining member 32 can be formed of polyimide or the like, for example.

  As shown in FIG. 2, the upper end 30a of the conductive part 30 and the base part 21 of the spiral contactor 20 are joined by a joining means such as a conductive adhesive. Here, the hole portion 11a and the hole portion 32a are joined to face each other, and the hole portion 11a and the hole portion 32a form a hole 3c. In addition, the winding end 23 is configured to be positioned at the center of the hole 11a.

  The lower end of the hole 11 a is closed by a connection terminal 40 connected to the conductive portion 30. Therefore, since the connection terminal 40 is individually opposed to the spiral contact 20 across the hole 11a, the lower surface 3b has the same predetermined rule as described above (predetermined intervals in the X direction and Y direction in the drawing). Are arranged in accordance with a planar matrix).

  The connection terminal 40 can be formed of, for example, a material such as Cu, Ni, or Au. In addition to those formed of a single layer by these materials, a stack of Cu and Ni, a stack of Ni and Au, or the like, A plurality of materials may be laminated. Further, the connection terminal 40 can be manufactured by directly plating the respective materials on the lower surface 11 c of the base 11. However, only the connection terminal 40 may be formed in advance, and the connection terminal 40 may be attached to the lower surface 11 c of the base 11.

  The hole portion 11a is preferably filled with a filling material 50 such as a resin material, and the lower end 30b of the conductive portion 30 and the lower surface 50b of the filling material 50 are preferably formed as the same planarized surface. Thus, when the hole 11a is filled with the filling material 50 to form the flattened surface, the connection terminal 40 is brought into contact with the lower end 30b of the conductive portion 30 so that the connection terminal 40 contacts the lower end 30b of the conductive portion 30. It becomes easy to form in the lower surface 11c. Further, it is preferable that the upper end 30a of the conductive portion 30 and the upper surface 50a of the filling material 50 are the same flat surface. If comprised in this way, the upper end 30a of the said electroconductive part 30 and the said base 21 of the said spiral contactor 20 can be joined easily.

  Here, the upper end 30 a of the conductive portion 30 constitutes the upper surface 3 a of the substrate 3, and the lower end 30 b constitutes the lower surface 3 b of the substrate 3.

  The flexible printed wiring board 4 has a flexible sheet 4a having flexibility and insulation. In the flexible sheet 4a, a plurality of conductor wires (not shown) constituting a circuit are formed on an upper surface 4a1 that is a first surface, and a tip region of the upper surface 4a1 is fixed to the fitting member 10. ing. The flexible printed wiring board 4 in FIG. 1 is a partial perspective view of the flexible sheet 4a viewed from the upper surface 4a1 side. FIG. 4 shows the flexibility of the flexible printed wiring board 4 with respect to the upper surface 4a1 side. It is the fragmentary perspective view seen from the lower surface 4a2 side of the sheet | seat 4a.

  As shown in FIG. 4, the lower surface 4a2 is formed with a plurality of external connection portions 4e electrically connected to the conductor wires. The external connection portion 4e is formed of a conductor.

  The fitting member 10 is made of, for example, epoxy resin mixed with glass fiber, has a thickness of 200 to 800 μm, and has a thickness of 500 μm, for example. The thickness dimension of the flexible sheet 4a is, for example, 0.1 to 0.2 μm.

  As shown in FIG. 4, the external connection portion 4e is formed in a planar matrix (lattice or grid) on the lower surface (opposing surface) 4a2 of the flexible sheet 4a with a predetermined interval in the X and Y directions. Formed in an array.

  In the connector 1, the board 3 is inserted and fitted into the fitting part 2 c of the housing 2, and the flexible printed wiring board 4 is placed on the board 3 to be fitted into the fitting part 2 c. It is used by being fitted and locked in the housing 2. This state will be described below with reference to FIGS. 5 to 7 are sectional views of the connector 1 taken along line VV shown in FIG.

  As shown in FIG. 5, the board 3 is inserted into the fitting portion 2c formed in the housing 2 so that the spiral contact 20 of the board 3 faces upward (Z1 direction in the drawing). Combine.

  Here, as shown in FIG. 1, in the fitting portion 2c, a first locking protrusion 5 as a first locking means, a second locking protrusion 6 as a second locking means, And the 3rd latching protrusion 7 which is a 3rd latching means is formed.

  When the substrate 3 is inserted into the fitting portion 2c, the lower surface 3b of the substrate 3 is engaged with the locking surface 6a of the second locking projection 6 and the locking surface 7a of the third locking projection 7. The substrate 3 is placed on the second locking projections 6 and the third locking projections 7 in a state of being in contact with each other. Meanwhile, the upper surface 3a of the substrate 3 is in contact with the locking surface 5a of the first locking projection 5, and the upper surface 3a of the substrate 3 is pressed by the locking surface 5a of the first locking projection 5, Locked to the housing 2. Therefore, the substrate 3 is securely locked to the housing 2 without being displaced in the fitting portion 2c.

  At this time, since the planar shape of the substrate 3 is similar to the planar shape of the fitting portion 2c, the substrate 3 is fitted without being displaced when fitted to the fitting portion 2c.

As shown in FIG. 5, when the substrate 3 is locked to the housing 2, the connection terminals 40 formed on the substrate 3 are on the lower side (Z2 direction in the drawing) than the lower surface 2 b of the housing 2. that protrude.

  Next, as shown in FIG. 6, the flexible printed wiring board 4 is inserted into the fitting portion 2c of the housing 2 from its tip 4d so that the external connection portion 4e faces downward (Z2 direction in the drawing). insert. And the said fitting member 10 formed in the said flexible printed wiring board 4 is mounted on the said board | substrate 3 fitted and latched in the said fitting part 2c, and it fits into the said fitting part 2c. Let At this time, the lower surface 4a2 of the flexible sheet 4a collides with a fourth locking projection 8 which is a fourth locking means formed on the housing 2, but the fitting member 10 is moved downward as it is. When pushed down (Z2 direction in the drawing), the fourth locking projection 8 is expanded outward by elastic deformation, and the fitting member 10 moves downward in the fourth locking projection 8. .

  At this time, the fourth locking protrusion 8 that has been spread outward is restored to its original state, and the upper surface 10 b of the fitting member 10 is pressed by the locking surface 8 a of the fourth locking protrusion 8. Is done. Thereby, the flexible printed wiring board 4 is locked to the housing 2. FIG. 7 shows this state, and FIG. 8 shows the state of FIG. 7 viewed obliquely from above.

  As shown in FIG. 7, in a state where the substrate 3 and the flexible printed wiring board 4 are locked to the fitting portion 2c of the housing 2, the spiral contact 20 formed on the substrate 3 is The external connection portion 4e formed on the fitting member 10 of the flexible printed wiring board 4 is opposed to and in contact with the external connection portion 4e. At this time, since the spiral contact 20 is three-dimensionally molded in a mountain shape protruding upward, the spiral contact 20 is elastically deformed when contacting the external connection portion 4e. The winding end 23 is pushed down in the Z2 direction in the drawing to form a planar shape. The spiral contact 20 is pressed and electrically connected in an elastically pressed state to the external connection portion 4e. Therefore, the spiral contact 20 and the external connection portion 4e can be reliably brought into contact with each other, and electrical connection can be improved.

  In the state shown in FIG. 7, the upper surface 10 b of the fitting member 10 is configured to be at a height position lower than the height position of the upper surface 2 a of the housing 2.

  Since the connection terminal 40 formed on the lower surface 3b of the substrate 3 protrudes from the lower surface 2b of the housing 2, the connection terminal 40 is another external circuit board located below the housing 2. It can be electrically connected to a certain external member (not shown). When the connection terminal 40 is electrically connected to the external member, the flexible printed wiring board 4 is electrically connected to the external member via the substrate 3.

  In the connector 1 according to the present invention, the plurality of spiral contacts 20 are arranged in a plane on the upper surface 3a of the substrate 3 in a matrix. The plurality of external connection portions 4e formed on the lower surface 4a2 of the flexible sheet 4a of the flexible printed wiring board 4 are also arranged in a matrix on the lower surface 4a2.

  Therefore, in the connector 1 of the present invention, it is possible to provide a large number of the spiral contact 20 and the external connection portions 4e that are to be electrically connected to face the spiral contact 20. The area can be increased. As a result, the connector 1 can be substantially reduced in size.

  In addition, since the connection terminals 40 are also arranged on the lower surface 3b in a matrix (lattice or grid), a large number of connection terminals connected to the external member (not shown) are provided. Therefore, the mounting area can be reduced.

  In the connector 1 of the present invention, the current supplied from the flexible printed wiring board 4 passes through the conductive portion 30 from the spiral contact 20 formed on the upper surface 3 a of the substrate 3, and the substrate 3 It flows to the connection terminal 40 formed on the lower surface of the. That is, since the current flowing from the spiral contact 20 formed on the upper surface 3a flows toward the lower surface 3b which is the opposite surface, the surface on which the spiral contact 20 is formed (the upper surface 3a It is not necessary to form a conductive path for guiding the current flowing out of the spiral contact 20 on the same plane as (2). Accordingly, it is possible to easily prevent a short circuit and to facilitate manufacture.

  The flexible printed wiring board 4 is inserted from above into the fitting portion 2 c of the housing 2, and the fitting member 10 formed on the flexible printed wiring board 4 is connected to the housing 2. The upper surface 10b of the fitting member 10 is configured to have a height position lower than the height position of the upper surface 2a of the housing 2 when inserted into the fitting portion 2c and fitted. Yes. Therefore, the entire connector 1 can be thinned.

  Furthermore, when the spiral contact 20 is pressed against the external connection portion 4e and elastically deformed, the spiral contact 20 is elastically deformed from a projecting shape to a planar shape. At this time, the external connection portion 4e is brought into contact with the winding start end 22 side of the spiral contactor 20 at the winding start end 22 side, that is, the outer side portion on the base portion 21 side. Therefore, it is possible to shorten the length of a line through which a current flows between the flexible printed wiring board 4 and the substrate 3, thereby reducing electric resistance and improving high frequency characteristics.

  Further, instead of the flexible printed wiring board 4, for example, a circuit board such as a flat cable having no flexible portion such as the flexible sheet 4a may be used.

Exploded perspective view showing an implementation form of the connector of the present invention, Sectional drawing which cut | disconnected the board | substrate shown in FIG. 1 by the II-II line | wire shown in FIG. Enlarged perspective view showing the shape of the contact probe, The partial perspective view which shows the wiring board shown in FIG. 1 from the back surface, Sectional drawing which shows the usage method of the connector shown in FIG. Sectional drawing which shows the usage method of the connector shown in FIG. 1 shows how to use the connector shown in FIG. The perspective view which shows the state at the time of use of the connector shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,101 Connector 2,62 Housing 2a Upper surface 2b Lower surface 2c, 61A, 61B Fitting part 3,61 Board | substrate 3a Upper surface 3b Lower surface 3c Hole 4 Flexible printed wiring board 4a1 Upper surface 4a2 Lower surface 4e External connection part 5 1st latching protrusion 6 Second locking projection 7 Third locking projection 8 Fourth locking projection 10 Fitting member 11 Base 11a, 64 Hole (through hole)
20, 120 Spiral contacts 30, 66 Conductive portion 40 Connection terminal 65 Locking projections 70A, 70B Fitting member 90 Leaf spring contact

Claims (3)

A substrate having a first surface and a second surface, and a plurality of elastically deformable spirals arranged from the first surface at intervals in two directions orthogonal to each other and protruding from the first surface And a plurality of connection terminals that are provided to face each of the contacts on the second surface and are electrically connected to an external circuit board ; A plurality of conducting portions for conducting the contact and the connection terminal ;
The substrate, and a housing in which a plurality of wiring member engaging member is fixed to the other surface has an external connection portion facing the contact on one surface is attached,
The housing is formed with an opening that opens toward the bottom, a first locking portion that fits the substrate, and a second locking portion that fits the fitting member,
The board is positioned by being locked by the first locking portion in a state where the plurality of connection terminals are exposed from the opening toward the bottom, and the fitting member is positioned by the second locking portion. when it is engaged in, characterized in that said contact with the external connection portions are opposed individually, the contactor and the the external connection portion and the contact are compressed deformation is electrically conductive A face-to-face connector. Wherein the housing, is fitted portion of the concave formation, face-to-face connector according to claim 1, wherein the fitting member and the substrate is positioned by being fitted to the inside of the fitting portion. Facing connector of the wiring member according to claim 1 or 2, wherein a flat cable or a flexible printed wiring board.

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