JP4133915B2 - PCB connector - Google Patents

Description

  The present invention relates to a printed circuit board connector. In particular, the present invention relates to a printed circuit board connector in which a positioning guide pin is provided on a printed board on which one connector is mounted, and a guide bush is provided on the printed board on which the other connector is mounted.

  For example, a plurality of printed boards are mounted and arranged in an electronic device or an electronic device. Connectors are mounted on each set of printed circuit boards, and these connectors are directly connected mechanically and electrically directly without using electrical cables, and the printed circuit boards that form a set are electrically connected to each other. Has been done.

  When the first printed circuit board on which one connector is mounted is fixedly arranged and the second printed circuit board on which the other connector is mounted moves and the one connector and the other connector are fitted In addition, a guide pin is provided on one connector side, and a guide bush is provided on the other connector side to insert the guide pin, thereby facilitating positioning of the connector as a set.

  Both printed circuit boards on which each of the printed circuit board connectors forming such a set is mounted are arranged to face each other and to be arranged so as to be substantially orthogonal to each other. As a printed circuit board connector in which both printed circuit boards are crossed, the entire connector is miniaturized, the positioning function between the connectors is improved, the mounting strength and workability of the guide pins are improved, and the guide pins and the printed circuit boards Has been invented (for example, see Patent Document 1).

  The printed circuit board connector according to Patent Document 1 includes a plug connector mounted on the surface of one printed circuit board and a receptacle connector mounted on the surface of the other printed circuit board.

The plug connector includes a housing having an opening into which the receptacle connector is inserted, and a conductive guide pin that extends along the axial direction of the housing in the housing and has a function of aligning the plug connector and the receptacle connector. The receptacle connector includes a housing having a guide hole into which the guide pin is inserted, and a contact that is disposed along the guide hole and electrically contacts the guide pin.
JP 2002-93490 A

  FIG. 6 is a cross-sectional view of a plug connector according to the invention of Patent Document 1. FIG. 6 of the present application corresponds to FIG. As shown in FIG. 6, the plug connector 70 includes a housing 72 having an opening 71 into which a receptacle connector serving as a mating connector is inserted.

  The plug connector 70 includes a conductive guide pin 73 that extends along the axial direction of the housing 72 in the housing 72 and has a function of aligning the plug connector 70 and the receptacle connector. The guide pins 73 are electrically connected to the printed circuit board C1.

  The housing 72 is formed of an insulating resin, and is formed in a U-shaped cross section in which the three surfaces of the box are opened as a whole. That is, the opening 71 and both side surfaces are open. Therefore, it has a back plate 74, an upper plate 75, and a bottom plate 76.

  As shown in FIG. 6, the guide pin 73 is disposed in the vicinity of the center portion of the housing 72, and projects from the opening 71 of the housing 72 at the tip end portion 73 </ b> A of the guide pin 73. By projecting the distal end portion 73A of the guide pin 73 from the opening 71 of the housing 72, the guide pin 73 and the guide hole provided in the receptacle connector can be aligned first. Furthermore, the guide pin 73 is disposed near the center of the housing 72 so that the housing 72 and the receptacle housing are necessarily aligned with each other.

  The printed board C1 is provided with a through hole 71S having a conductive layer (not shown) on the inner surface. A through hole 74 </ b> A for allowing the base end portion 73 </ b> B of the guide pin 73 to pass therethrough is provided near the center portion of the back plate 74 of the housing 72. A knurl 73 </ b> C is provided on the peripheral surface of the base end portion 73 </ b> B of the guide pin 73. The knurl 73C is formed by a plurality of ribs (protrusions) extending in the axial direction at intervals in the circumferential direction of the base end portion 73B.

  The guide pin 73 is electrically connected to the printed circuit board C1 by inserting (press-fitting) the base end portion 73B of the guide pin 73 into the through hole 71S through the through hole 74A of the back plate 74. Yes. With this configuration, both a structure in which the guide pin 73 is electrically connected to the printed circuit board C1 and a structure in which the guide pin 73 is fixed to the printed circuit board C1 can be achieved at the same time.

  Furthermore, a female screw portion (not shown) is provided on the end surface of the guide pin 73 on the base end portion 73B side. And the base end part 73B of the guide pin 73 is being fixed to the printed circuit board C1 with the male screw 77 with a head screwed into the internal thread part from the back surface side of the printed circuit board C1. Thereby, the guide pin 73 and the housing 72 can be simply and reliably fixed to the printed circuit board C1.

  On the back surface of the printed circuit board C1, a land 72L is provided around the through hole 71S and is electrically connected to the conductive layer of the through hole 71S. The reason why the land 72L is provided is to enable the head 77a of the male screw 77 with the head to be brought into contact with the land 72L directly or indirectly through the conductive metal washer 3W. . Therefore, the electrical connection between the guide pin 73 and the printed circuit board C1 can be further ensured by simply tightening the male screw 77 with a head.

  Near the base end portion 73 </ b> B of the guide pin 73, a hexagonal (non-circular) flange 73 </ b> F that goes around the outer periphery of the guide pin 73 is provided. Near the center of the back plate 74 of the housing 72, a recess 74B in which the flange 73F is closely fitted is provided around a through hole 74A through which the base end portion 73B of the guide pin 73 passes. The combination of the flange 73F and the recess 74B fixes the guide pin 73 to the housing 72 and the printed circuit board C1 in a state in which the guide pin 73 cannot rotate about its axis.

  FIG. 7 is a perspective external view in which a guide pin having the same function as the guide pin 73 shown in FIG. 6 and a printed board are arranged. The guide pin 83 shown in FIG. 7 has a distal end portion 83A formed in a conical shape, and a proximal end portion 83B formed with a male screw. A flange portion 83F is provided near the base end portion 83B.

  In FIG. 7, the guide pin 83 is fixed to the printed circuit board C <b> 1 by inserting a base end portion 83 </ b> B formed with a male screw into a through hole 81 formed in the printed circuit board C <b> 1 and fastening with a hexagon nut 87. Note that the metal washer 3W shown in FIG. 6 may be interposed between the hexagon nut 87 and the printed circuit board C1. Thus, in FIG. 7, the guide pin fixing method is different from that in FIG.

  FIG. 8 is a perspective external view in which a guide pin having the same function as the guide pin 73 shown in FIG. 6 and a printed board are arranged. The guide pin 93 shown in FIG. 8 has a distal end portion 93A formed in a conical shape, and a proximal end portion 93B is provided with a female screw portion (not shown). A flange portion 93F is provided near the base end portion 93B. The flange portion 93F is formed with a protrusion 93D that serves as a detent.

  In FIG. 8, the base end portion 93B and the projection 93D in which the female screw portion is formed are inserted into the through hole 91 and the rotation preventing hole 91A formed in the printed circuit board C1, and fastened with the male screw 77 with the head portion 77A. The pin 93 is fixed to the printed circuit board C1. Note that the metal washer 3W shown in FIG. 6 may be interposed between the male screw 77 and the printed board C1. Thus, in FIG. 8, the guide pin fixing method is different from that in FIGS.

  Thus, all of the guide pins shown in FIGS. 6 to 8 are fixed to the printed circuit board by screwing. Conventional guide pins require a tool such as a screwdriver or a wrench to be fixed to a printed circuit board.

  However, the conventional guide pin mounting structure that requires such a tool has poor workability and is not suitable for mass production. There is a demand for a structure that can more easily mount guide pins on a printed circuit board.

  In order to solve the above-described problems, the present invention is for a printed circuit board having a structure in which the guide pins can be more easily mounted on the printed circuit board when the positioning guide pins are fixed to the printed circuit board on which the connector is mounted. An object is to provide a connector.

  In order to satisfy the above object, the inventor has a structure in which positioning guide pins are press-fitted and fixed to a printed circuit board, and the following new printed circuit board connector has been invented.

  (1) One connector is mounted on the first printed circuit board, the other connector is mounted on the second printed circuit board, and the one connector and the other connector are engaged with each other. A printed circuit board connector having a guide pin for positioning on the first printed circuit board and a guide bush into which the guide pin is inserted into the second printed circuit board, wherein the guide pin is A printed circuit board connector, wherein the printed circuit board connector is press-fitted and fixed to the first printed circuit board.

  (2) A shaft portion whose tip is formed in a conical shape and into which the guide bush is inserted, and a flange portion which is formed on the other end of the shaft portion and comes into contact with the mounting surface of the first printed circuit board. And a plurality of press-fit pins that protrude from the axial center of the flange portion to a position on the same circumference that is equally divided radially and are press-fitted into the first printed circuit board. (1) The printed circuit board connector according to (1).

  (3) The printed circuit board connector according to (2), wherein the outer periphery of the shaft portion of the guide pin is formed with a flat surface that is cut out of a subarc and becomes a chord.

  (4) The first printed circuit board on which the one connector is mounted and the second printed circuit board on which the other connector is mounted are opposed to each other. The printed circuit board connector according to any one of 3).

  (5) The first printed circuit board on which the one connector is mounted and the second printed circuit board on which the other connector is mounted are arranged so as to be substantially orthogonal to each other. The printed circuit board connector according to any one of (1) to (3).

  (6) The printed circuit board connector according to any one of (1) to (5), wherein a pair of the guide pins are disposed on both longitudinal blades of the one connector.

  According to the invention described in (1), “one connector is mounted on the first printed circuit board and the other connector is mounted on the second printed circuit board, the one connector and the other connector” The first printed circuit board is provided with positioning guide pins, and the second printed circuit board is provided with a guide bush into which the guide pins are inserted. The guide pin may be press-fitted and fixed to the first printed circuit board.

  The guide pin provided on the first printed circuit board on which one connector is mounted protrudes in the insertion direction of the other connector, and this guide pin may be disposed in the vicinity of one connector alone, preferably, The guide pins may be arranged in a pair so as to oppose the two wings in the longitudinal direction of one connector. Further, this guide pin may be integrated with one connector.

  One connector may be a rectangular connector for printed circuit boards mounted on the first printed circuit board. The other connector may be a printed circuit board rectangular connector mounted on the second printed circuit board. The first and second printed boards may be single-sided printed boards, double-sided printed boards, or multilayer printed boards.

  One connector according to the present invention may be a receptacle and the other connector may be a plug. One connector may be a plug, and the other connector may be a receptacle. The shell type multi-pole receptacle is normally inserted with a male contact, and the mating shell type multi-pole plug is inserted with a female contact, but the male contact is inserted into the plug and the male contact is inserted into the receptacle. May be.

  The plurality of contacts provided in one connector according to the present invention may have their leads surface-mounted on the first printed circuit board, and the leads inserted into through holes formed in the first printed circuit board and soldered together. Also good. Alternatively, the leads of the plurality of contacts may be press-in connected (solderless connection) to the first printed circuit board as press-fit pins.

  The present invention may be most characterized in that a positioning guide pin is press-fitted and fixed to a printed circuit board. Since the guide pins are press-fitted and fixed to the printed circuit board, a tool is no longer required for screwing as in the prior art. Workability is improved so that the guide pins can be more easily mounted on the printed circuit board. In addition, guide pins can be mounted on a printed circuit board with an automatic mounting machine, and the structure is suitable for mass production.

  According to the invention described in (2), “in the printed circuit board connector described in (1), the tip is formed in a conical shape and the shaft is inserted into the guide bush, and is formed at the other end of the shaft. A flange portion that is in contact with the mounting surface of the first printed circuit board, and projects from the axial center of the flange portion to a position on the same circumference that is radially divided equally. And a plurality of press-fit pins press-fitted into the guide pins ”.

  The tip shape of the shaft portion into which the guide bush is inserted is not limited to a conical shape, and may be a hemispherical shape or a pyramid shape. The shaft portion is preferably formed in a cylindrical shape, but does not exclude the formation of a polygonal column shape. The flange portion that is in contact with the mounting surface of the first printed circuit board has a contact area that is at least larger than the axial sectional area of the shaft portion, and the shape of the flange portion is not limited to a cylindrical shape, It may be a curved column such as an elliptical column or a polygonal column such as a square column. And it is preferable that the axial center of a flange part and the axial center of an axial part correspond.

  The plurality of press-fit pins may be press-fitted and fixed to the flange portion, and may be further welded and integrated. Two press-fit pins may be arranged at positions divided into two on the same circumference, or three may be arranged at positions equally divided into three on the circumference, preferably the same circumference Four may be arranged at positions equally divided into four above.

  Press-fit pins (also referred to as press termination) are terminals (posts) with specially processed parts that are generally applied as contacts for printed circuit board connectors and are suitable for solderless press-in connections. A press-fit pin is press-fitted into a through hole formed in the printed circuit board.

  However, the printed board into which the press-fit pin referred to in the present invention is press-fitted does not have to be formed with a through hole, and is a press-fit hole having an inner diameter slightly smaller than the outer diameter of a part specially processed into the press-fit pin. A press-fit pin may be press-fitted and fixed.

  When the guide pin according to the present invention is used as an electrical connection terminal in addition to positioning, a press-fit pin may be press-fitted into the through hole for press-in connection. The specially processed portion of the press-fit pin may be a solid type having no elasticity, and preferably a compliant type having a spring structure.

  According to the invention described in (3), “in the printed circuit board connector described in (2), the outer periphery of the shaft portion of the guide pin is formed with a flat surface that is cut off from an inferior arc”. It may be a feature.

  The shaft portion in which the inferior arc having a circumferential angle of less than 180 degrees is cut out to form a plane that becomes a chord functions as a key for preventing erroneous connector insertion. For example, reverse mounting between one connector and the other connector can be prevented by forming a keyway in the guide bush into which the guide pin is inserted.

  Then, “the first printed circuit board on which one connector is mounted and the second printed circuit board on which the other connector is mounted may be arranged to face each other”. The one printed circuit board and the second printed circuit board on which the other connector is mounted may be arranged so as to be substantially orthogonal to each other.

  In the printed circuit board connector of the present invention, one connector is mounted on the first printed circuit board, the other connector is mounted on the second printed circuit board, and the one connector and the other connector are fitted. For this purpose, the first printed circuit board is provided with a positioning guide pin, the second printed circuit board is provided with a guide bush into which the guide pin is inserted, and the guide pin is the printed circuit board. As a result of being press-fitted into and fixed to the tool, a tool is no longer required for screwing as in the prior art. Workability is improved so that the guide pins can be more easily mounted on the printed circuit board.

  In addition, guide pins can be mounted on a printed circuit board with an automatic mounting machine, and the structure is suitable for mass production.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a structural view showing an embodiment of a guide pin for positioning according to the present invention. 1A is a front view of the guide pin 3, FIG. 1B is a left side view of FIG. 1A, and FIG. 1C is a right side view of FIG. 1A.

  In the embodiment of FIG. 1, the guide pin 3 includes a guide pin body 31 and four press fit pins 32. The four press-fit pins 32 are press-fitted into a flange portion 31F formed on the guide pin main body 31, and are integrated. The guide pin main body 31 is formed by, for example, zinc die casting, and is plated with nickel after the copper base treatment. The press-fit pin 32 is formed of, for example, a copper alloy, and is plated with gold after the nickel base treatment.

  The distal end portion 31A of the guide pin main body 31 is formed in a conical shape, and the shaft portion 31B is formed in a cylindrical shape. A flange portion 31F having an outer diameter larger than the outer diameter of the shaft portion 31B is formed at the other end of the shaft portion 31B. The shaft center of the flange portion 31F and the shaft center of the shaft portion 31B coincide.

  In the embodiment of FIG. 1, a rectangular groove 311 is formed in the flange portion 31 </ b> F at positions on the same circumference that are radially divided into four from the axial center of the flange portion 31 </ b> F. A rectangular cutout groove 312 is formed so as to be orthogonal to the rectangular groove 311.

  The press-fit pins 32 formed in a T-shape are press-fitted into the rectangular grooves 311 and the four press-fit pins 32 are respectively fixed to the flange portions 31F. The press-fit pin 32 is formed with a compliant portion 32A having a spring structure at a portion protruding from the flange portion 31F.

  A counterbore 315 is formed from the bottom surface of the flange portion 31F to the middle of the shaft portion 31B. The guide pin body 31 can be manufactured without distortion by manufacturing a mold so that the counterbore 315 is formed and die-casting the guide pin body 31.

  In the embodiment of FIG. 1, a flat surface 314 is formed on the outer periphery of the shaft portion 31 </ b> B so that a subarc is notched and becomes a string. By partially notching the outer periphery of the shaft portion 31B in this way, the shaft portion 31B functions as a key for preventing erroneous connector insertion. Furthermore, an arc groove 313 is formed on the outer periphery of the flange portion 31F. The orientation of the flat surface 314 can be specified at the mounting position of the arc groove 313.

  FIG. 2 is a perspective external view in which a first printed circuit board on which one connector is mounted and guide pins mounted on the first printed circuit board are arranged.

  As shown in the embodiment of FIG. 2, the first printed board C <b> 1 has four through holes 11 into which the press fit pins 32 of the guide pins 3 are inserted. The through hole 11 has an inner diameter slightly smaller than the outer diameter of the compliant portion 32 </ b> A formed in the press fit pin 32. When the press-fit pin 32 is press-fitted into the first printed circuit board C1, it is elastically held in the through hole 11 so that it cannot be pulled out easily.

  A through hole 12 is formed in the first printed circuit board C1. By fitting the circular groove 313 formed in the through hole 12 and the flange portion 31F, the orientation of the plane 314 in which the outer periphery of the shaft portion 31B is cut out can be specified. The through hole 12 serves as a so-called mark, and a circular land pattern may be formed instead of the through hole.

  FIG. 3 is a perspective external view in which a first printed circuit board on which one connector is mounted and guide pins mounted on the first printed circuit board are arranged. 2 is viewed from the mounting surface of the first printed circuit board C1, while FIG. 3 is viewed from the opposite surface (generally, the pattern formation surface) of the first printed circuit board C1. .

  FIG. 4 is a perspective external view crossing a first printed circuit board on which one connector is mounted and a second printed circuit board on which the other connector is mounted.

  In the embodiment shown in FIG. 4, the first printed circuit board C1 and the second printed circuit board C2 are arranged so as to be substantially orthogonal to each other. The first printed circuit board C1 and the second printed circuit board C2 may be arranged to face each other. In the embodiment of FIG. 4, for example, the first printed circuit board C1 is fixedly arranged, and the second printed circuit board C2 is movable.

  In the embodiment shown in FIG. 4, the plug connector 10 is formed by combining two plug connectors 10A and one plug connector 10B, and is mounted on the first printed circuit board C1. A pair of guide pins 3 are fixedly disposed on both longitudinal blades of the plug connector 10.

  On the other hand, in the embodiment of FIG. 4, a receptacle connector 20 in which two receptacle connectors 20A and one receptacle connector 20B are combined is mounted on the second printed circuit board C2. A pair of guide bushes 4 in which the guide pins 3 are inserted into both longitudinal wings of the receptacle connector 20 are fixedly arranged.

  The second printed circuit board C2 shown in FIG. 4 is movably held by a pair of guide rails (not shown), for example, and moves the second printed circuit board C2 to the first printed circuit board C1 side. Then, the pair of guide pins 3 are inserted into the pair of guide bushes 4 for positioning, and the plug connector 10 and the receptacle connector 20 can be mechanically and electrically connected by moving the second printed circuit board C2. .

  FIG. 5 is a perspective external view crossing a first printed circuit board on which one connector is mounted and a second printed circuit board on which the other connector is mounted. 4 is viewed from the mounting surface of the first printed circuit board C1, while FIG. 5 is viewed from the opposite surface (generally, the pattern formation surface) of the first printed circuit board C1. .

FIG. 3 is a structural diagram showing an embodiment of a guide pin for positioning according to the present invention. 1 is a perspective external view in which a first printed circuit board on which one connector according to the present invention is mounted and guide pins mounted on the first printed circuit board are arranged. 1 is a perspective external view in which a first printed circuit board on which one connector according to the present invention is mounted and guide pins mounted on the first printed circuit board are arranged. FIG. 3 is a perspective external view of a first printed circuit board on which one connector according to the present invention is mounted and a second printed circuit board on which the other connector is mounted. It is a perspective appearance figure intersecting with the 1st printed circuit board which mounts one connector, and the 2nd printed circuit board which mounts the other connector. It is sectional drawing of the plug connector by a prior art. FIG. 7 is a perspective external view in which a guide pin having the same function as a guide pin according to the prior art and a printed board are arranged. FIG. 7 is a perspective external view in which a guide pin having the same function as a guide pin according to the prior art and a printed board are arranged.

Explanation of symbols

3 Guide pin 4 Guide bush 10 Plug connector (one connector)
10A, 10B Plug connector 11, 12 Through hole 20 Receptacle connector (the other connector)
20A / 20B Receptacle Connector 31 Guide Pin Body 31A Tip 31B Shaft 31F Flange 32 Press Fit Pin 32A Compliant 311 Groove 312 Notch Groove 313 Arc Groove 314 Flat Surface 315 Counterbore C1 Printed Circuit Board (First Printed Circuit Board) )
C2 printed circuit board (second printed circuit board)

Claims (4)

One connector mounted on the first printed circuit board, the other connector mounted on the second printed circuit board, positioning guide pins provided on the first printed circuit board, and provided on the second printed circuit board A guide bush into which the guide pin is inserted, and a printed circuit board connector into which the one connector and the other connector are fitted,
The guide pin includes a shaft portion having a tip portion formed conically and into which the guide bush is inserted, and a flange formed at a base end portion of the shaft portion and abutted against a mounting surface of the first printed circuit board. And a plurality of press-fit pins projecting to positions on the circumference that are radially divided equally from the axial center of the flange portion,
The shaft portion has a flat surface on the outer periphery that becomes a chord in which a subarc is cut,
The flange portion has an arc groove on the outer periphery that identifies the orientation of the plane,
The guide pin is adapted to fit the arc groove to a specific through hole provided in the first printed circuit board, and the plurality of press fit pins are press-fitted and fixed to the first printed circuit board. Printed circuit board connector. The printed circuit board connector according to claim 1, wherein the first printed circuit board and the second printed circuit board are disposed to face each other. The printed circuit board connector according to claim 1, wherein the first printed circuit board and the second printed circuit board are arranged so as to be substantially orthogonal to each other. 4. The printed circuit board connector according to claim 1, wherein a pair of the guide pins are disposed on both outer wings in the longitudinal direction of the one connector. 5.

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