JP2014010938A - Board-to-board connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a board-to-board connector by which a sufficient electric contact can be formed and that can be manufactured at low costs with a small number of kinds of components.SOLUTION: A pair of terminal fittings 12 are combined. The terminal fitting 12 comprises a main body 14, and a soldering section 16 having a tip portion 18 extending from its lower end portion and connected to a substrate 26. An upward extending plug section 20 is provided above the lower end portion of the main body 14. A surface side socket section 24 curved toward a surface 14a of the main body 14 and extending upward, and a rear surface side socket section 22 curved toward a rear surface 14b and extending upward are provided above the lower end portion of the main body 14. The terminal fittings 12 are mounted at opposed positions of the two substrates 26. An upper end portion of one plug section 20 is inserted between the rear surface and surface side socket sections 22, 24 of the other plug section, and is held under a pressure contact state by elasticity of the socket sections 22, 24.

Description

  The present invention relates to a board-to-board connector for electrically connecting two opposing boards.

  Conventionally, as disclosed in, for example, Patent Document 1, a plurality of contacts configured by a pair of plugs and sockets mounted on each inner surface of two substrates facing each other and interconnecting wiring patterns of the same potential There are board-to-board connectors. The plug is composed of a plug contact that is a terminal fitting having a first connection portion soldered to the board, and a plug housing that holds a plurality of plug contacts, and the socket is a second connection that is soldered to the board. A socket contact that is a terminal fitting having a portion and a socket housing that holds a plurality of socket contacts.

  Moreover, although it is a technique not limited to the use which connects a board | substrate to a board | substrate, as disclosed in patent document 2, the 1st terminal metal fitting (contact) by which a lower end part is attached to the board | substrate surface, There is a connector composed of a mating second terminal fitting (contact) and a mating connector portion having a housing (body) holding the second terminal fitting. In this connector, the second terminal fitting of the mating connector portion is formed so as to be connectable to the board, and the wiring patterns of the same potential are interconnected by mounting a pair on each inner surface of the two boards facing each other. It can be used as a single contact board-to-board connector.

JP 2006-12625 A Japanese Utility Model Publication No. 5-48275

  Since the board-to-board connector of Patent Document 1 is configured by combining many types of members, there is a problem that the cost of the connector itself and the manufacturing cost of a mold for manufacturing each component and a dedicated jig are increased. is there. In addition, since the plug and socket are always used in pairs, there is a problem that the factory for assembling the board must be managed so as not to unbalance the number of plugs and sockets in stock.

  Further, the connector of Patent Document 2 is a single contact connector in which the housing for holding the first terminal fitting is omitted, and the configuration is simpler than the board-to-board connector of Patent Document 1, but again, there are a plurality of types. Since the members are combined, the same problem as described above remains.

  The present invention has been made in view of the above-described background art, and provides a board-to-board connector that can form good electrical contacts and can be manufactured at low cost with fewer types of components. Objective.

The present invention includes a substantially rectangular main body, a soldering portion extending from the lower end portion of the main body portion and soldered to the substrate, and extending upward above the lower end portion of the main body portion. A plug portion formed above, a surface side socket portion extending upwardly while curving toward the surface side of the main body portion above the lower end portion of the main body portion, and the main body portion adjacent to the surface side socket portion. A pair of terminal fittings integrally formed of a metal plate that is elastically deformable, and has a back side socket part that extends upward while curving toward the back side of the main body part above the lower end part. In combination,
The terminal fittings are respectively mounted on the inner side surfaces of the two substrates fixed at positions facing each other, the tip portions of the soldering portions are solder-connected to the wiring pattern of the substrate, and the plug portions are Each of the plug portions is supported vertically with respect to the board, and the upper end portion of one of the plug portions is inserted between the mating front surface side and back surface side socket portions, and occurs in the plate thickness direction generated in the front surface side and back surface side socket portions. It is a board-to-board connector in which the front surface side and the back surface side socket portion are pressed against the plug portion and are electrically connected to each other by an elastic force.

  Embossed protrusions may be provided on the front and back socket portions, and the outer surface of the protrusion may be in pressure contact with the plug portion. In addition, a nozzle suction portion for automatic mounting extends from the lower end portion of the main body portion toward the front surface side or the back surface side of the main body portion, and the soldering portion includes the lower end portion of the main body portion and the nozzle suction portion. The structure which extended from the edge part of the part and the front-end | tip part was formed so that surface mounting was possible may be sufficient. Furthermore, the structure which the some said front-end | tip part was formed in the said soldering part, and the some front-end | tip part was alternately arrange | positioned in the plate | board thickness direction along the lower end part of the said main-body part may be sufficient.

  The board-to-board connector according to the present invention can be configured by combining a pair of the same terminal fittings and has only one type of component, which is advantageous in terms of cost and member management. In addition, when the two boards to be connected are fixed, the portions where the terminal fittings are fitted contact with each other with mechanical freedom in the vertical and horizontal directions, and the front and back side sockets. Since the portion and the plug portion are in press contact with flexibility, a force other than the press contact direction does not act on the contact portion, and a good conduction state can be maintained.

1 is a perspective view showing an embodiment of a board-to-board connector of the present invention. It is the front view (a) which shows the terminal metal fitting which comprises the connector of this embodiment, a right view (b), a top view (c), and a perspective view (d). It is the front view (a) and right view (b) which show the state which mounted the terminal metal fitting of FIG. 2 on each inner surface of two board | substrates, and opposes mutually. It is the front view (a) and right view (b) which show the state which a pair of terminal metal fitting of FIG. 2 fitted. It is the front view (a), right view (b), top view (c), and perspective view (d) which show the modification of the terminal metal fitting of FIG.

  Hereinafter, an embodiment of a board-to-board connector according to the present invention will be described with reference to the drawings. The connector 10 of this embodiment is configured by combining a pair of the same terminal fittings 12.

  The terminal fitting 12 is integrally formed by stamping from a single elastically deformable metal plate such as phosphor bronze, and has a substantially rectangular main body 14 as shown in FIG. Hereinafter, the front side surface of the main body 14 (the front side surface in FIG. 2A) is referred to as a front surface 14a, and the back side surface is referred to as a back surface 14b.

  The lower end portion of the main body portion 14 is integrally provided with a soldering portion 16 formed with three tip portions 18a to 18c that are solder-connected to a wiring pattern of a substrate 26 described later. The tip portions 18a and 18b extend substantially horizontally from both ends of the lower end portion of the main body portion 14 in a direction perpendicular to the surface 14a, and are bent downward in the middle. The distal end portion 18c is a central portion of the lower end portion of the main body portion 14, extends substantially horizontally from between the distal end portions 18a and 18b to the back surface 14b, and is bent downward in the middle. That is, when the terminal fitting 12 is viewed from above, the tip end portions 18 a to 18 c are alternately arranged in the plate thickness direction along the lower end portion of the main body portion 14 as shown in FIG.

  Above the lower end portion of the main body portion 14, a substantially rectangular plug portion 20 extends between the tip portions 18 a and 18 c so as to be straight upward in the direction opposite to the protruding direction of the tip portions 18 a and 18 c. The width of the plug portion 20 is about 2/5 of the width orthogonal to the vertical direction of the main body portion 14, and as shown in FIG. 2A, the plug portion 20 is provided close to the end on the side where the tip end portion 18a is located. .

  A substantially rectangular front side socket portion 24 and rear side socket portion 22 are formed along the plate surface direction adjacent to the plug portion 20 above the lower end portion of the main body portion 14.

  The front surface side socket portion 24 projects in parallel adjacent to the plug portion 20 and extends upward while being curved toward the front surface 14 a side of the main body portion 14. The width of the front side socket portion 24 is about 1/5 of the width of the upper end portion of the main body portion 14. An embossed protrusion 24a protruding toward the back surface 14b is provided at a position near the tip of the front surface side socket 24. When the front surface side socket portion 24 is viewed from the right side, the base portion is greatly bent and widened from the upper end portion of the main body portion 14 toward the front surface 14a side, and is bent halfway in the opposite direction toward the back surface 14b side with a gentle inclination. The outer surface of the portion 24 a overlaps with the plug portion 20 on the extension line of the main body portion 14 in the plate surface direction. And the upper side of the overlapped portion is bent in the opposite direction and extends in a direction that spreads toward the surface 14a with a gentle inclination.

  The back surface side socket portion 22 protrudes in parallel adjacent to the front surface side socket portion 24, and extends upward while curving toward the back surface 14b side of the main body portion 14. The width of the back side socket portion 22 is about 1/5 of the length of the upper end portion of the main body portion 14. At a position near the tip of the back surface side socket portion 22, an embossed protrusion portion 22a protruding toward the front surface 14a is provided. When the back side socket part 22 is viewed from the right side, as shown in FIG. 2 (b), the root part is greatly folded and widened from the upper end part of the main body part 14 toward the back side 14b, and is folded in the middle. It faces toward the surface 14 a with a gentle inclination, and the outer surface of the protrusion 22 a overlaps the plug portion 20 on the extension line of the main body 14. Then, the upper side of the overlapped portion is bent in the opposite direction and extends in a direction that spreads toward the back surface 14b with a gentle inclination.

  In this way, the shape of the front and back side socket portions 22 and 24 viewed from the right side is substantially line-symmetric with the plug portion 20 as the central axis, as shown in FIG. Further, the width between the projections 22 a and 24 a of the front surface side and back surface side socket portions 22 and 24 is a length that falls within the width of the plug portion 20.

  As shown in FIG. 3, a pair of terminal fittings 12 having the same shape are respectively mounted on the inner side surfaces of two substrates 26 and 26 fixed at positions facing each other, as shown in FIG. 16 tip portions 18a, 18b, 18c are inserted into through holes of each substrate 26 and soldered to the wiring pattern, and the plug portion 20 and the front and back side socket portions 22, 24 are respectively connected to the substrate 26. Supported vertically.

  Here, the upper substrate 26 is mounted on 26 (1), the lower substrate 26 is mounted on 26 (2), the terminal fitting 12 mounted on the substrate 26 (1) is mounted on 12 (1), and the substrate 26 (2). The terminal fitting 12 is represented as 12 (2). Further, the reference numerals of the respective parts of the terminal fitting 12 are also distinguished by adding (1) and (2) at the end.

  As shown in FIG. 3, the terminal fittings 12 (1) and 12 (2) have the upper end portions of the main body portions 14 (1) and 14 (2) facing up and down, and the plug portion 20 (1) is on the surface side. And the back side socket portions 22 (2) and 24 (2), and the front side and back side socket portions 22 (1) and 24 (1) are arranged to face the plug portion 20 (2). .

  When the boards 26 (1) and 26 (2) are brought close to each other, the upper end portion of the plug portion 12 (1) pushes the mating front and back socket portions 22 (2) and 24 (2). Inserted in between. At the same time, the upper end portion of the plug portion 12 (2) is inserted between the other surface side and back surface side socket portions 22 (1) and 24 (1). Then, the substrates 26 (1) and 26 (2) are fixed to each other via a fixing member such as a spacer, and the state shown in FIG. 4 is obtained.

  In this state, a resilient force in the plate thickness direction is generated in the front and back socket portions 22 (2) and 24 (2) to return to the original shape, and the front and back socket portions 22 (2). 24 (2), the outer surfaces of the protrusions 22a (2) and 24a (2) are in pressure contact with each other so as to sandwich the plug portion 20 (1), and are electrically connected to each other. Similarly, the front-side and back-side sockets 22 (1) and 24 (1) also have a resilient force in the plate thickness direction to return to the original shape, and the front-side and back-side sockets 22 (1). 24 (1), the outer surfaces of the protrusions 22a (1) and 24a (1) are in pressure contact with each other so as to sandwich the plug portion 20 (2), and are electrically connected to each other.

  As described above, this board-to-board connector 10 can be configured by combining a pair of the same terminal fittings 12 and has one kind of member, which is advantageous in terms of cost and member management.

  In addition, in a state where the two substrates 26 are fixed, the portions where the terminal fittings 12 are fitted are in contact with each other with mechanical freedom in the vertical and horizontal directions, and the front surface side and back surface side socket portions 22 are connected. , 24 and the plug portion 20 are pressed with flexibility, so that a force other than the pressing direction does not act on the contact portion, and a good conduction state can be maintained. In particular, the socket portions 22 and 24 are provided with embossed protrusions 22a and 24a, and contact with both surfaces of the socket portion 22 in a narrow area on the outer surface of the protrusions 22a and 24a. It is possible to concentrate and further improve the stability of conduction.

  Further, since the tip end portions 18a to 18c of the soldering portion 16 are alternately arranged in the plate thickness direction when viewed from above, the terminal fitting 12 is less likely to be tilted when the terminal fitting 12 is mounted on the board 26, and the counterpart terminal fitting 12 It is possible to easily ensure an appropriate positional relationship between the two.

  In addition, the connector of this invention is not limited to the said embodiment. For example, as shown in FIG. 5, a surface mounting type terminal fitting 28 may be used. The terminal fitting 28 according to this modification has a flat structure in which the structure of the soldering portion 16 of the terminal fitting 12 of FIG. 2 is changed and extends from the lower end portion of the main body portion 14 toward the back surface 14b side of the main body portion 14. This part becomes the nozzle suction part 30 for automatic mounting. The soldering part 32 is extended from the lower end part of the main-body part 14 and the edge part of the nozzle adsorption | suction part 30, and three front-end | tip parts 34a-34c are formed in what is called a gull wing shape (L-shaped cross section).

  Further, when the current passing through the contact of the connector becomes large, the width of the plug portion can be widened, the width of the front surface side and back surface side socket portions can be widened, or the number can be increased. For example, the main body portion 14 of the terminal fitting 12 of FIG. 2 is lengthened, the plug portion 20 is widened outward (for example, about 1.5 times), and a new front side socket portion (on the outside of the back side socket portion 22 ( The same thing as the surface side socket part 24) is attached. By changing in this way, the resistance value of the terminal fitting itself is reduced, and the number of contacts with which the pair of terminal fittings contacts increases from four to six, so that the electrical contact resistance can also be reduced.

  In addition, the shape in which the front and back side socket parts are curved to the front side or the back side of the main body part is such that the upper end portion of the plug part is placed between the front side and the back side socket part when mating with the mating plug part. Any shape that can be inserted and can be freely changed as long as the front side and the rear side socket part can press-contact the plug part by the elastic force in the thickness direction generated in the front side and the rear side socket part. Can do. For example, the number of protrusions provided at the tip portion may be increased or decreased, or the protrusions may be provided by a method other than embossing.

DESCRIPTION OF SYMBOLS 10, 28 Connector 12 Terminal metal fitting 14 Main-body part 16, 32 Soldering part 18a, 18b, 18c, 34a, 34b, 34c Tip part 20 Plug part 22 Back surface side socket part 22a Protrusion part 24 Front surface side socket part 24a Protrusion part 26 Substrate

Claims (3)

A substantially rectangular main body, a soldering portion extending from a lower end portion of the main body portion and having a tip portion solder-connected to the substrate, and a plug portion extending upward above the lower end portion of the main body portion And above the lower end part of the main body part, above the lower end part of the main body part adjacent to the front side socket part, and a surface side socket part extending upward while curving toward the surface side of the main body part And a pair of terminal fittings that are integrally formed of a metal plate that can be elastically deformed. And
The terminal fittings are respectively mounted on the inner side surfaces of the two substrates fixed at positions facing each other, the tip portions of the soldering portions are solder-connected to the wiring pattern of the substrate, and the plug portions are Supported perpendicular to the substrate,
The upper end portion of one of the plug portions is inserted between the other surface side and back surface side socket portions, and the surface side and back surface are caused by the elastic force in the plate thickness direction generated in the front surface side and back surface side socket portions. A board-to-board connector, wherein the side socket part is in pressure contact with the plug part and is electrically connected to each other.   The board-to-board connector according to claim 1, wherein an embossed protrusion is provided on the front surface side and the back surface socket part, and an outer surface of the protrusion is in pressure contact with the plug part. 3. The pair of substrates according to claim 1, wherein a plurality of the tip portions are formed in the soldering portion, and the plurality of tip portions are alternately arranged in a plate thickness direction along a lower end portion of the main body portion. Connector for board.

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