JP2013062144A - Contact member, and method of manufacturing the same - Google Patents

Abstract

A contact member capable of ensuring high reliability by preventing the occurrence of cracks and peeling in a plating layer and a method for manufacturing the contact member are provided.
A contact member 10 has a pair of side wall portions 30 erected from a side portion of a bottom portion 21 which is a base end portion of a band-like portion 20 mounted on a mounting substrate, and a bottom portion 21 and a press-fit portion 22 which is a distal end portion. A spring portion 23 is formed so that the belt-like portion 20 is folded back and contacted with the connected body, and a pair of locking pieces 24 that are locked in the respective holes 31 provided in the side wall portion 30 are press-fit portions. It protrudes on the side of 22. The upper wall portion of the pair of side wall portions 30 is provided with an insertion slide surface 32 that widens the distance between the pair of side wall portions 30 when the press-fit portion 22 is press-fitted into the pair of side wall portions 30. The stopper piece 24 is formed with a tapered portion 24 a that widens the distance between the pair of side wall portions 30.
[Selection] Figure 1

Description

  In the present invention, a pair of side wall portions are erected from the side portion of the base end portion of the belt-like portion mounted on the mounting substrate, and the belt-like portion is folded between the base end portion and the tip portion, The present invention relates to a contact member in which a spring part for contact is formed, and a locking piece that locks into each hole provided in a side wall part is projected from the side part of the tip part.

As a contact member, for example, a contact member that is mounted on a connection base such as a printed circuit board and is brought into contact with a contacted body such as a casing, a shield plate, or a negative electrode of a battery, and functions as a ground terminal is known. (For example, refer to Patent Documents 1 and 2).
The "electrical connection terminal and the connector using the same" described in Patent Document 1 are provided with a protrusion protruding in the width direction on one end side of the terminal and a side wall portion extending to the side of the protrusion on the other end side. The side wall is formed with an engagement hole that engages the protrusion and restricts the movement of the protrusion in the vertical direction and the front-rear direction to a displacement amount.

  In addition, the “earth terminal” described in Patent Document 2 has a base portion that forms a mounting portion that is attached to a printed circuit board, and a base portion that extends upward from both opposing sides of the base portion. A stopper receiving portion in which a stop hole is formed, a contact portion that is extended from the other side of the base portion to the side facing the upper surface of the base portion, elastically deformable from the curved portion, and a base from both sides of the contact portion facing each other A stopper that is extended on each side, the tip portion forms a locking portion that is locked with the locking hole of the stopper receiving portion, and the movement to the base portion side is restricted by locking with the locking hole. It consists of

JP 2007-324029 A Japanese Patent No. 3851526

  Here, the manufacturing method of the conventional contact member is demonstrated based on FIG. First, a conductive metal plate that can be elastically deformed is punched into a substantially T shape, and then plated (see FIG. 7A). Next, between the base end part 111 and the front-end | tip part 112 of the strip | belt-shaped part 110, the strip | belt-shaped part 110 is folded back and the spring part 113 is formed (refer FIG.7 (B)). Then, the spring part 113 is pressed to the position of the hole 121 (engagement hole / locking hole) when the side wall part 120 (stopper receiving part) is erected, and the locking piece 114 (projection / locking part) is pushed down. In this state, the pair of side wall portions 120 are bent by press work to stand, and the locking piece 114 is locked in the hole 121 (see FIG. 7C).

  However, in the conventional contact member manufactured in this way, after the plating process, the side wall portion is bent upright by press working, so excessive stress is applied to the bent portion between the base end portion of the belt-like portion and the side wall portion. As a result, the plating layer may crack or peel off.

  If the plating layer is cracked or peeled off, rust is generated from the exposed portion, which causes corrosion, resulting in low reliability.

  Then, an object of this invention is to provide the contact member which can ensure high reliability by preventing that a crack and peeling generate | occur | produce in a plating layer, and its manufacturing method.

  In the contact member of the present invention, a pair of side wall portions are erected from the side portion of the base end portion of the strip portion mounted on the mounting substrate, and the strip portion is folded between the base end portion and the tip end portion. A contact member formed with a spring portion for contacting a connected body and having a pair of locking pieces that lock into respective holes provided in the side wall portion projecting from a side portion of the tip portion. The upper wall portion of the pair of side wall portions is provided with a slide surface for insertion that widens the distance between the pair of side wall portions when the tip portion is press-fitted into the pair of side wall portions. Features.

  According to the contact member of the present invention, when the front end portion of the belt-like portion is pushed between the pair of side wall portions and the locking piece is slid on the side wall portion and locked in the hole in the side wall portion, The upper wall portion is provided with an insertion slide surface that widens the distance between the pair of side wall portions, so that the locking piece can be smoothly moved to the hole. Therefore, even if the side wall portion is erected before the plating process, the locking piece can be locked in the hole, so that stress is applied to the bent portion between the base end portion and the side wall portion of the plated belt-shaped portion. Will not take. Therefore, it is possible to prevent the plating layer from being peeled off at the bent portion between the base end portion and the side wall portion of the belt-like portion.

  In the contact member of the present invention, a pair of side wall portions are erected from the side portion of the base end portion of the strip portion mounted on the mounting substrate, and the strip portion is folded between the base end portion and the tip end portion. A contact member formed with a pair of locking pieces projecting on the side of the tip portion, each of which is formed with a spring portion for contacting the body to be connected, and is engaged with each hole provided in the side wall portion. Further, the pair of locking pieces is formed with a tapered portion that presses the gap between the pair of side wall portions when the distal end portion is press-fitted into the pair of side wall portions. .

  According to the contact member of the present invention, when the distal end portion of the belt-like portion is pushed between the pair of side wall portions and the locking piece is slid on the side wall portion and locked to the hole in the side wall portion, Since the tip is formed with a tip that widens the distance between the pair of side wall portions, the locking piece can be smoothly moved to the hole. Therefore, even if the side wall portion is erected before the plating process, the locking piece can be locked in the hole, so that stress is applied to the bent portion between the base end portion and the side wall portion of the plated belt-shaped portion. Will not take. Therefore, it is possible to prevent the plating layer from being peeled off at the bent portion between the base end portion and the side wall portion of the belt-like portion.

  It is desirable that the end portion of the belt-like portion is bent along the press-fitting direction into the pair of side wall portions. When the tip is bent along the press-fitting direction, when the tip is press-fitted into the pair of side walls, the tip is between the pair of side walls from the front to the rear of the tip in the press-fitting direction. Since it is inserted little by little and spreads out, it is possible to press-fit the front end portion without difficulty and to lock the locking piece into the hole in the side wall portion.

  In the method for manufacturing a contact member of the present invention, a pair of side wall portions are erected from the side portion of the base end portion of the strip portion mounted on the mounting substrate, and the strip portion is provided between the base end portion and the tip end portion. A contact member formed with a spring portion that is folded back to come into contact with the body to be connected, and a pair of locking pieces that lock into respective holes provided in the side wall portion project from the side portion of the tip portion. And the step of integrally forming the strip and the side wall from a plate material, the pair of side walls being erected with respect to the base end of the strip, and the strip Forming the spring part by bending the sheet, and a locking piece projecting from the side part of the tip part of the belt-like part is press-fitted between the pair of side wall parts, and is provided on the side wall part. A step of locking the locking piece in the hole, and with respect to the belt-shaped portion and the side wall portion. The Kki process, and performing after erecting the side wall portion.

  According to the method for manufacturing a contact member of the present invention, if the side wall portion is erected before plating, stress may be applied to the bent portion between the base end portion and the side wall portion of the plated belt-like portion. Therefore, the plating layer can be prevented from peeling off.

  In the present invention, after the pair of side wall portions are erected, the strips of the band-shaped portion are locked in the holes of the side wall portions, so that the plating layer at the bent portion of the band-shaped portion and the side wall portions can be cracked or peeled off. Occurrence can be prevented. Therefore, the present invention can ensure high reliability.

It is a perspective view which shows the contact member which concerns on embodiment of this invention. It is a figure which shows the use condition of the contact member shown in FIG. It is a flowchart which shows an example of each process of the manufacturing method of the contact member shown in FIG. It is a figure for demonstrating the manufacturing method of the contact member shown in FIG. (A) And (B) is a figure for demonstrating the state by which a press-fit part is press-fitted between side wall parts. It is a figure for demonstrating the state by which a press fit part is press-fitted between side wall parts. It is a figure for demonstrating the manufacturing method of the conventional contact member.

  A contact member according to an embodiment of the present invention will be described with reference to the drawings. In the present specification, the mounting substrate side on which the contact member is mounted is described as being downward, and the mounting surface side of the mounting substrate is described as being upward.

  A contact member 10 shown in FIG. 1 is mounted on a connection base such as a printed circuit board, and is brought into contact with a contacted body such as a housing or a shield plate to function as a ground terminal by short-circuiting and conducting. For example, as illustrated in FIG. 2, the ground of the mounting substrate B can be electrically connected to the frame ground by mounting the contact member 10 on the mounting substrate B and contacting the inner surface of the housing C.

  As shown in FIG. 1, the contact member 10 is integrally formed with a band-shaped portion 20 and a pair of side wall portions 30. The belt-like portion 20 has a base end portion that becomes the bottom portion 21 of the contact member 10 and is mounted on the mounting substrate B by, for example, soldering. The bottom portion 21 is provided with a constricted portion 21a that relieves stress when the side wall portion 30 is erected.

  Further, the belt-like portion 20 is formed with a spring portion 23 for the belt-like portion 20 to be folded back and contacted with the body to be connected between the bottom portion 21 and the press-fit portion 22 that is the tip of the belt-like portion 20. In the spring portion 23 of the present embodiment, a first bent portion 23a is formed by extending from the bottom portion 21 to a predetermined position along the mounting substrate B and then being folded back into a substantially U shape. The second bent portion 23b is formed by extending toward the portion 30 and then bent upward, and further folded toward the bottom portion 21 to form the third bent portion 23c.

  A pair of locking pieces 24 that protrude from the side portions are provided on the press-fit portion 22 that is the tip portion of the band-shaped portion 20. The locking piece 24 is formed with a tapered portion 24a whose tip in the press-fitting direction forms an arc shape. The press-fit portion 22 is formed with a fourth bent portion 23d that is slightly bent from the spring portion 23 so as to follow the press-fit direction.

  The side wall portion 30 is integrally provided on both side portions of the bottom portion 21 of the belt-shaped portion 20 and is erected so as to be parallel to both side portions of the bottom portion 21. The side wall 30 is formed in a substantially rectangular outer shape. A rectangular hole 31 is provided at substantially the center of the side wall portion 30, and the locking portion 24 formed at the tip of the press-fit portion 22 can be visually recognized from the outer side of the hole 31. Further, an insertion slide surface 32 that extends in a direction in which the side wall portions 30 are separated from each other is provided on the upper wall portion of the side wall portion 30 as an inclined surface. Is in contact with the distal end of the slide surface 32 for insertion, thereby preventing an excessive displacement of the spring portion 23.

A method of manufacturing the contact member 10 according to the embodiment of the present invention configured as described above will be described with reference to FIGS.
In step S10, the side wall portion 30 provided with the belt-like portion 20 and the hole 31 in a state where the contact member 10 is developed is punched into a substantially T shape from a large-sized elastically deformable conductive metal plate. It is formed (see FIG. 4A).
Next, in step S20, the upper wall portion of the side wall portion 30 is bent and inclined to form the insertion slide surface 32 (see FIG. 4B). Next, in step S30, the side wall portion 30 is raised and erected from the bottom portion 21 (see FIG. 4C).

Next, in step S40, the spring portion 23 of the belt-shaped portion 20 is formed by bending the first bent portion 23a, the second bent portion 23b, and the third bent portion 23c, and the press-fit portion. The fourth bent portion 23d is formed by bending between 22 and the spring portion 23 (see FIG. 4D). These bendings can be performed by pressing.
Next, in step S50, the contact member 10 after the band-like portion 20 is bent to form the spring portion 23 is subjected to a plating process. Finally, in step S60, the third bent portion 23c of the spring portion 23 is pressed to press-fit the press-fit portion 22 into the pair of side wall portions 30 (see FIG. 4E).

  At this time, as shown in FIG. 5A, when the spring portion 23 is pressed and the press-fit portion 22 reaches the insertion slide surface 32 of the side wall portion 30, the pair of insertion slide surfaces 32 spread outward. Therefore, the press-fit portion 22 can be easily positioned between the side wall portions 30, and the press-fit portion 22 can be press-fitted without resistance. Further, as shown in FIG. 6, since the press-fit portion 22 is bent by the fourth bent portion 23 d along the press-fit direction, when the press-fit portion 22 is press-fitted into the pair of side wall portions 30, 24a is pushed into the pair of side walls 30 little by little from the front part to the rear part of the tapered part 24a in the press-fitting direction, and the side wall part 30 is spread by the arc surface of the tapered part 24a. It is possible to start press-fitting between the side wall portions 30 of the first wall.

  If the press-fit portion 22 can be inserted between the pair of side wall portions 30, as shown in FIG. 5 (B), the third bent portion 23c of the spring portion 23 is further pressed, thereby further spacing between the side wall portions 30. It is easy to push the press-fit portion 22 into the back side by spreading. Then, the locking piece 24 passes through the wall portion of the side wall portion 30 to reach the hole 31, and the pair of side wall portions 30 returns to the original interval, whereby the rear end of the locking piece 24 is locked to the hole 31. Can be made. As a result, a preload (preload) is applied to the spring portion 23 of the contact member 10, and not only the deformation of the spring portion 23 due to an external force is prevented, but also a reliable contact between the spring portion 23 and the housing C is maintained. Is possible.

  Thus, when the contact member 10 is manufactured, even if the side wall portion 30 is erected, the press-fitting portion 22 can be easily press-fitted and the locking piece 24 can be locked in the hole 31, so that the side wall Plating can be performed after the portion 30 is erected. Therefore, excessive stress is not applied to the bent portion of the bottom portion 21 and the side wall portion 30 which is the base end portion of the belt-like portion 20, and thus the plating layer at the bent portion is prevented from cracking or peeling off. can do. Therefore, since the occurrence of corrosion on the contact member 10 can be prevented, high reliability can be ensured.

  In the present embodiment, the plating process in step S50 is performed after the folding process in step S40. However, in the point of preventing damage to the plating layer at the bent portion between the bottom portion 21 and the side wall portion 30, step S30 is performed. It may be after the side wall part standing process by. However, if the bending process is performed after the plating process, the spring part 23 and / or the press-fit part 22 may be damaged during the pressing process. Desirable after completion.

In the present embodiment, the slide surface 32 for insertion is provided on the side wall portion 30 and the taper 24a is provided on the locking piece 24. However, either the taper 24a or the slide surface 32 for insertion may be used. Good.
Further, in the present embodiment, the insertion slide surface 32 of the side wall portion 30 is an inclined surface having a linear cross section extending outward, but may be an arc-shaped inclined surface.
Furthermore, in the present embodiment, the slide surface forming step in step S20, the side wall standing step in step S30, and the bending step in step S40 are performed in this order, but these steps may be interchanged.

  The present invention is suitable for a contact member that functions as a ground terminal by contacting a ground of a printed circuit board, a housing, or a negative electrode of a battery.

DESCRIPTION OF SYMBOLS 10 Contact member 20 Band-shaped part 21 Bottom part 21a Constriction part 22 Press-fit part 23 Spring part 23a 1st bending part 23b 2nd bending part 23c 3rd bending part 23d 4th bending part 24 Locking piece 24a Pointer 30 Side wall 31 Hole 32 Slide surface for insertion B Mounting board C Housing

Claims (6)

A pair of side wall portions are erected from the side portion of the base end portion of the strip-shaped portion mounted on the mounting substrate, and the strip-shaped portion is folded between the base end portion and the tip end portion to contact the connected body. A contact member formed with a pair of locking pieces protruding to the side of the tip,
The upper wall portion of the pair of side wall portions is provided with an insertion slide surface that presses the gap between the pair of side wall portions when the tip end portion is press-fitted into the pair of side wall portions. Contact member.   2. The contact member according to claim 1, wherein the pair of locking pieces is formed with a tip that widens a distance between the pair of side wall portions when the tip end portion is press-fitted into the pair of side wall portions. A pair of side wall portions are erected from the side portion of the base end portion of the strip-shaped portion mounted on the mounting substrate, and the strip-shaped portion is folded between the base end portion and the tip end portion to contact the connected body. A contact member formed with a pair of locking pieces protruding to the side of the tip,
The contact member, wherein the pair of locking pieces is formed with a tip that widens the distance between the pair of side wall portions when the distal end portion is press-fitted into the pair of side wall portions.   4. The slide surface for insertion is provided on the upper wall portion of the pair of side wall portions to increase the distance between the pair of side wall portions when the distal end portion is press-fitted into the pair of side wall portions. The contact member as described.   The contact member according to any one of claims 2 to 4, wherein a distal end portion of the belt-like portion is bent along a press-fitting direction into the pair of side wall portions. A pair of side wall portions are erected from the side portion of the base end portion of the strip-shaped portion mounted on the mounting substrate, and the strip-shaped portion is folded between the base end portion and the tip end portion to contact the connected body. A contact member formed with a pair of locking pieces projecting on the side of the tip, wherein the spring portion is formed, and a pair of locking pieces locked to the respective holes provided in the side wall portion,
Forming the strip and the side wall integrally from a plate material;
A step of standing the pair of side wall portions with respect to a base end portion of the belt-shaped portion, and bending the belt-shaped portion to form the spring portion;
A step of press-fitting a locking piece projecting from a side portion of the tip of the belt-like portion between the pair of side wall portions, and locking the locking piece in a hole provided in the side wall portion; Including
A method for manufacturing a contact member, wherein the plating treatment for the strip portion and the side wall portion is performed after the side wall portion is erected.

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