JP2008041384A - Crimping contact and its press-fit method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crimping contact which is easy to form and does not require time and effort for press-fit work into a printed-circuit board, and enables to have a strong supporting force of the circuit board. <P>SOLUTION: The crimping contact 1 is composed integrally of a crimping part and a board contact part, in which the end part of an electric wire is connected to the crimping part and the board contact part is pressed in a press-in hole of the printed circuit board to rise and to be fixed to the printed-circuit board. The crimping part 2, the board contact part 4, a press-fit margin part 6 of projected shape which positions and fixes the crimping contact into a temporary fixing hole of an insulating housing to temporarily fix this crimping contact, a press-fit shoulder part 7 for press-fit to be pressed into the press-in hole of the printed circuit board, and a terminal pull-out stopper part 8 of projected shape to prevent coming-off of the crimping contact from the temporary fixing hole of the insulating housing are arranged and installed on the same flat plane to be formed integrally. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a crimp contact and a press-fitting method for connecting a relatively thick electric wire such as a lead wire or coaxial cable to a printed circuit board or the like.

  Conventionally, in order to ensure electrical connection, the covering of the covering portion at the end of the electric wire is broken, the core wire at the end is exposed, and the covering portion and the core wire are separated by the covering barrel and the core wire barrel. Crimping contacts that are crimped by a crimping machine are known. For example, as a conventional example 1, there is a crimp contact for a thick wire cable, which has a crimp portion and a pressure contact piece for crimping and connecting the thick cable, and the pressure contact piece is provided in the connector for the thin wire cable. There is known one that is press-contacted to and connected to the press-contacting piece (see Patent Document 1).

Further, as a conventional example 2, there is known a crimp contact for a coaxial cable or the like in which two types of contacts to be insulated from each other in the axial direction of an electric wire are connected by an intermediate bridge (see Patent Document 2).
JP-A-10-189072 JP 11-273760 A

  However, in the conventional crimp contact, as shown in FIG. 9, in the conventional example 1 in which the wire 9 is crimped to the crimp contact 15 and then connected to the press contact piece for the press contact, the number of parts for electrical connection is large. In addition, when press-fitting into the printed circuit board 3 or the like as in the conventional example 2, as shown in FIG. 10, since it is inserted into the printed circuit board by hand as shown in FIG. There is a problem that the twisting strength of the electric wire is also weak. Moreover, since it press-fits one by one, there is a problem that it takes time. The crimp contact according to the present invention has been proposed to solve such problems.

  The gist of the present invention for solving the above-mentioned problems of the crimp contact according to the present invention is to integrate a crimping portion and a substrate contact portion, and connect an end portion of an electric wire to the crimping portion. A press-fit contact that is press-fitted into a press-in hole and is erected and fixed to the printed circuit board, wherein the press-contact part, the board contact part, and an insulating housing that temporarily fixes the press-contact A protruding press-fitting allowance portion for fixing the position of the crimp contact in the temporary fixing hole, a press-fitting shoulder for press-fitting to press-fit into a press-in hole of the printed circuit board, and a temporary fixing hole of the insulating housing The protrusion-shaped terminal retaining portion for preventing the crimp contact from falling off is disposed on the same surface of the flat plate and integrally formed.

The gist of the press-fitting method of the crimp contact according to the present invention is as follows. The crimp contact of the present invention and the plurality of crimp contacts are temporarily fixed to the temporary fixing holes, and the substrate contact portion of the crimp contact is lowered from the lower end surface of the housing. Forming an insulating housing that protrudes to the crimp contact, and preparing an electric wire having an end connected to the crimp contact, and connecting the electric wire to the crimp contact, and then connecting a plurality of the crimp contacts to the insulating housing. The insulating housing is placed at a predetermined position on the printed circuit board, and the press-fitting device presses the press-fitting shoulder portion of the crimping contact in the insulating housing to press the board contact portion into the printed circuit board. It is press-fitting into a use hole, and press-fitting a plurality of the crimp contacts through an insulating housing.
Alternatively, the crimp contact of the present invention and an insulating housing that temporarily fixes the plurality of crimp contacts to the temporary fixing holes to project the substrate contact portion of the crimp contact downward from the lower end surface of the housing, An electric wire having an end connected to the crimp contact is prepared, the electric wire is connected to the crimp contact, and then the insulating housing is placed at a predetermined position on the printed circuit board, and the crimp contact is performed by a press-fitting device. A plurality of the crimp contacts are inserted into the temporary fixing holes of the insulating housing, and then the crimp contacts are pressed into the press-in holes of the printed circuit board. Then, a plurality of the crimp contacts are press-fitted together through an insulating housing.

  Furthermore, of the flat upper end surface of the insulating housing, at least the upper end surface in the range where a plurality of temporary fixing holes provided in the insulating housing exists is press-fitted by a press-fitting tool of a press-fitting device for press-fitting the crimp contact into the printed circuit board. This includes that the positioning is complete.

  According to the crimping contact and the press-fitting method of the present invention, since the die of the crimping contact is only bent and punched, only one die is required, and the die design becomes easy. In addition, the crimping contact is firmly temporarily fixed to the insulating housing by the terminal removal preventing portion, and it is easy to press-fit a plurality of contacts arranged and arranged in a line onto the printed circuit board.

  Since the electric wire is press-fitted into the printed board through the insulating housing and inserted, the holding power of the board is strong and the twisting strength of the wire material is dramatically increased.

By the press-fitting method of the crimp contacts, a plurality of the crimp contacts can be aligned with the insulating housing, and can be press-fitted into the printed circuit board in one row or in two rows facing each other. Furthermore, since the press-fitting of the crimp contact into the insulating housing and the press-in of the printed board into the press-in hole can be completed in one step, the contact press-fitting operation is made efficient, and the construction period and cost can be reduced.
By adjusting the upper end surface of the insulating housing to the completion of press-fitting of the press-fitting tool in the press-fitting device, press-fitting adjustment is facilitated.

  As shown in FIGS. 1 to 3, the crimp contact according to the present invention has a crimp portion 2 and a substrate contact portion 4 integrated, and an end portion of an electric wire is connected to the crimp portion 2 to form a printed circuit board ( 8 is a press-contact 1 that is press-fitted into a press-in hole 3a (see FIG. 8) 3a, and is erected and fixed to the printed circuit board 3. The press-contact 2 The substrate contact portion (also referred to as a press-in portion) 4, and a projecting press-fitting margin portion 6 for fixing the position of the crimp contact in a temporary retaining hole 5 a of an insulating housing (see FIG. 4) 5 for temporarily securing the crimp contact; The press-fit shoulder 7 for press-fitting to press-fit into the press-in hole 3 a of the printed circuit board 3 and the protruding contact for preventing the crimp contact from dropping from the temporary fixing hole 5 a of the insulating housing 5. The terminal retaining portion 8 is connected to the flat plate Arranged on one side are formed integrally.

  The crimp contact 1 is formed by one mold and in one step. At the time of molding, bending and punching are performed simultaneously. The crimp portion 2 includes a core barrel 2a that crimps a core wire of an electric wire and a coating barrel 2b that crimps a sheath portion of the electric wire. The press-fitting margin 6 protrudes in a right triangle shape from the side wall end face of the plate thickness retaining portion. The press-fitting shoulder 7 is a contact metal piece obtained by punching this contact from a metal plate, and is an upper end surface portion opposite to the substrate contact portion 4 in the press-fitting direction. The terminal retaining portion 8 is a semicircular protrusion that is projected by a half punch in the thickness direction of the contact metal piece.

  As shown in FIGS. 4 to 6, the insulating housing 5 in which the crimp contacts 1 are temporarily fixed to the temporary fixing holes 5a and aligned in a line is a rectangular synthetic resin box as shown in FIGS. A temporary fixing hole 5a is provided in which 1 is aligned and temporarily fixed.

  The leg 5b protruding below the box of the insulating housing 5 is inserted into the mounting hole 3b of the printed circuit board 3 as shown in FIGS. 4 (B) and 4 (C). The crimp contact 1 projects the substrate contact portion 4 of the crimp contact downward from the lower end surface of the insulating housing 5.

  Thus, the crimping contact 1 and the insulating housing 5 are formed and prepared, and the press-fitting method according to the present invention will be described. First, an electric wire is prepared for the crimp contact, and a core wire is crimped to the core barrel 2a and a sheath is crimped to the covering barrel 2b to the crimp contact 1, and the end of the wire 9 is connected. To do.

  Thereafter, the plurality of crimp contacts 1 connected to the electric wires 9 are inserted into the temporary fixing holes 5 a of the insulating housing 5. This state is the temporarily fixed state shown in FIG. Since the terminal retaining portion 8 collides with the elastic protrusion 5d of the insulating housing 5, the crimp contact 1 cannot be pulled out upward in the drawing. Further, the press-fitting allowance portion 6 bites into the wall portion of the temporary fixing hole 5 a of the insulating housing 5 and is fixed.

  Then, the insulating housing 5 is placed at a predetermined position on the printed circuit board 3. At this time, the position of the substrate contact portion 4 of the crimp contact 1 is aligned with the press-in hole 3a of the printed circuit board 3, and the position of the leg portion 5b of the insulating housing 5 is aligned with the mounting hole 3b.

  A press-fitting device (not shown) presses the press-fitting shoulder 7 of the crimp contact 5 in the insulating housing 5, and the plurality of the contact contacts 1 are printed on the printed circuit board contact portions 4 via the insulating housing 5. The substrates 3 are press-fitted together into the press-in holes 3a. The press-fitting margin 6 of the crimp contact 1 bites into the lower portion of the wall of the temporary fixing hole 5a so that the crimp contact 1 is firmly fixed.

  In this press-fitting operation, of the flat upper end surface 5c of the insulating housing 5, at least the upper end surface 5c in the range where the plurality of temporary fixing holes 5a provided in the insulating housing 5 exist, the crimp contact 1 is attached to the printed circuit board 3. The press-fitting completion is determined by the press-fitting tool of the press-fitting device for press-fitting. Thereby, in the press-fitting device, the press-fitting amount of the crimp contact 1 can be easily managed.

  In the press-fitting operation of the crimp contact 1 by the press-fitting device, the insulating housing 5 is positioned and placed in advance on the printed circuit board 3, and the crimp contact 1 is held by the press-fitting device to the temporary fixing hole 5 a of the insulating housing 5. Press-fitting and temporarily fixing, and performing the press-fitting work as it is, press-fitting the substrate contact portion 4 of the crimping contact 1 into the press-in hole 3a of the printed circuit board to make a series of continuous one-pressing work. May be. As a result, only one press-fitting process by the press-fitting device is required, thereby reducing process and cost in the assembly process.

1 is a perspective view of a crimp contact 1 according to the present invention. They are a top view (A), a front view (B), and a side view (C) of the crimp contact 1 of the present invention. It is the rear view (A) of the crimping contact 1 of the same invention, and a sectional view (B) of the substrate contact portion 4 along the line ZZ. FIG. 4 is a plan view (A), a front view (B), a side view (C), and a sectional view (D) along the YY line of the insulating housing 5. It is sectional drawing along the XX line in FIG. 4 is a bottom view of the insulating housing 5. FIG. It is explanatory drawing which shows a mode that the crimping contact 1 of this invention is press-fit in the temporary fix | stop hole 5a of the insulation housing 5. FIG. Sectional view (A) in a state where the crimp contact 1 of the present invention is press-fitted into the temporary fixing hole 5a of the insulating housing 5, and a sectional view (B) showing a state in which the crimp contact 1 is further press-fitted into the press-in hole 3a. is there. It is a front view of the state which connected electric wire 9 to crimping contact 15 concerning a conventional example. It is explanatory drawing which shows a mode that the crimping | compression-bonding contact 15 which concerns on the prior art example is fixed to the printed circuit board 3 manually.

Explanation of symbols

1 Crimp contact,
2 crimping part,
2a core barrel, 2b coated barrel,
3 Printed circuit board, 3a Press-in hole,
3b mounting hole,
4 Board contact area,
5 Insulating housing, 5a Temporary fixing hole,
5b leg, 5c upper end surface,
5d elastic protrusion,
6 Press-fitting allowance,
7 Press-in shoulder,
8 Terminal retaining part,
9 Electric wire.

Claims (4)

The crimping part and the board contact part are integrated, the end of the electric wire is connected to the crimping part, the board contact part is press-fitted into the press-in hole of the printed board, and the printed board is raised and fixed. Crimp contact,
Press-fitting into the press-in hole of the printed circuit board, the protruding press-fitting margin for fixing the position of the crimp contact in the temporary fixing hole of the insulating housing for temporarily fixing the crimp contact, the substrate contact part, and the crimp contact A press-fitting shoulder for press-fitting and a protruding terminal retaining portion for preventing the crimp contact from falling off from the temporary fixing hole of the insulating housing are provided on the same surface of the flat plate. Being integrally formed,
Crimp contact characterized by. The crimp contact according to claim 1 and an insulating housing that temporarily fixes the plurality of crimp contacts in temporary fixing holes to project the substrate contact portion of the crimp contact downward from the lower end surface of the housing,
Prepare an electric wire whose end is connected to the crimp contact,
The electric wire is connected to the crimp contact,
Thereafter, a plurality of the crimp contacts are inserted into the temporary fixing holes of the insulating housing,
Place this insulating housing in place on the printed circuit board,
Pressing the press-fitting shoulder of the crimp contact in the insulating housing with a press-fitting device to press-fitting the board contact portion into the press-in hole of the printed board,
Press-fitting a plurality of the crimp contacts together through an insulating housing;
A method for press-fitting a crimp contact characterized by The crimp contact according to claim 1 and an insulating housing that temporarily fixes the plurality of crimp contacts in temporary fixing holes to project the substrate contact portion of the crimp contact downward from the lower end surface of the housing,
Prepare an electric wire whose end is connected to the crimp contact,
The electric wire is connected to the crimp contact,
Then, the insulating housing is placed at a predetermined position on the printed circuit board,
The press-fitting device is used to press the press-fitting shoulder of the press-contact, and the plurality of the press-contacts are inserted into the temporary fixing holes of the insulating housing, and then the press-contact is pressed to press the board contact portion of the printed circuit board. Press fit into the hole
Press-fitting a plurality of the crimp contacts together through an insulating housing;
A method for press-fitting a crimp contact characterized by Of the flat upper end surface of the insulating housing, at least the upper end surface in the range where there are a plurality of temporary fixing holes provided in the insulating housing is positioned by press-fitting completion of the press-fitting tool of the press-fitting device for press-fitting the crimp contact into the printed circuit board. That
The press-fitting method of the crimp contact according to claim 2 or 3.

Images