JP2013062142A - Press-fit terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press-fit terminal which exhibits a high holding force even with a housing formed of fragile synthetic resin whose toughness is low.SOLUTION: In a press-fit terminal 100, a first hooking projection 101 and a second hooking projection 102 protruding in a width direction W of a terminal body 105 are formed at both side edges 104 of a band-like terminal body 105, in such a manner as arranged side by side in a press-fit direction P of the terminal body 105. A resin pressurizing projection 103 which protrudes higher than the first hooking projection 101 is provided behind the second hooking projection 102 positioned behind in the press-fit direction P. Smooth parts 101p and 102p, being almost parallel to the press-fit direction P, are provided respectively in top regions of the first hooking projection 101 and the second hooking projection 102. In front of the press-fitting direction P of the smooth parts 101p and 102p, inclined parts 101s and 102s are provided which form a rising slop in the press-fit direction P, from the front toward the back. Hooking parts 101r and 102r being perpendicular to the press-fit direction P are provided at the back of the smooth parts 101p and 102p.

Description

  The present invention relates to a metal press-fit terminal that is fixed to a housing by press-fitting into a press-fit hole formed in an insulating resin housing constituting an electrical connector.

  The electrical connector is formed by press-fitting a metal press-fit terminal into each of a plurality of mounting holes provided in an insulating resin housing. The press-fit terminal is provided with at least a pair of left and right engaging protrusions having tapered portions that form an upward slope from the front to the rear in the press-fit direction on the left and right side edges in the width direction orthogonal to the press-fit direction. When the press-fit terminal is press-fitted into the mounting hole provided in the housing, the locking projection is in a state of being bitten into the inner peripheral surface of the mounting hole, so that the press-fit terminal is fixed to the housing and a detent action occurs.

  A pair or a plurality of locking protrusions can be provided. For example, when two pairs of locking protrusions are provided, the first locking protrusion positioned in front of the press-fitting terminal in the press-fitting direction and the first locking protrusion positioned behind the first locking protrusion. 2 When the protrusions of the locking projections are the same, when the press-fit terminal is press-fitted into the mounting hole, the first locking projection pushes the synthetic resin on the inner peripheral surface of the mounting hole and plastically deforms it. Since the second locking projection is positioned, the required holding force may not be obtained.

  In order to solve such a problem, a plurality of pairs of claws are protruded on both sides in the plate width direction, and the plurality of pairs of claws are larger in the protruding height on the press-fitting rear side (for example, Patent Literature 1) Alternatively, the press-fit portion is configured by a flat single layer structure, and the plurality of barbs are configured such that their tips are alternately positioned in one direction and the other direction of the main facing surface of the press-fit portion. The thing (for example, refer patent document 2) etc. is proposed.

Japanese Utility Model Publication No. 63-50466 JP 2005-353371 A

  The press-fit terminals described in Patent Documents 1 and 2 increase the holding force by causing a plurality of pairs of locking projections (claws, barbs) to bite into the housing, so that the housing is formed of a highly elastic synthetic resin. However, a sufficient holding force cannot be obtained for a housing formed of a synthetic resin that is brittle with low toughness.

  That is, a synthetic resin (for example, SPS: syndiotactic polystyrene resin or PPS: polyphenylene sulfide resin) that is being widely used as a housing material for which demand for improving heat resistance is increasing has low toughness and brittleness. Therefore, when the press-fit terminal described in Patent Documents 1 and 2 is press-fitted into a housing formed of such a synthetic resin, after the locking projection has passed, there is a gap formed behind it. Since it remains without being filled by the restoring force of the synthetic resin constituting the housing, it is a fact that a sufficient holding force cannot be obtained.

  Therefore, the problem to be solved by the present invention is to provide a press-fit terminal having low toughness and exhibiting a strong holding force even with respect to a housing formed of a brittle synthetic resin.

  The press-fit terminal of the present invention is a press-fit terminal in which at least a pair of locking projections protruding in the width direction of the terminal body are formed on both side edges of the band plate-shaped terminal body. A resin pressing protrusion protruding higher than the locking protrusion is provided on the rear side in the press-fitting direction. Here, “projected higher than the locking protrusion” means that the protruding dimension in the width direction of the band-shaped terminal body is larger than the locking protrusion.

  With such a configuration, when the press-fit terminal according to the present invention is press-fitted into the mounting hole of the synthetic resin housing, the locking projections on both side edges of the terminal body that advance in the mounting hole are the inner periphery of the mounting hole. The resin pressing protrusion that protrudes higher than the locking protrusion passes through the area after passing the surface while expanding the surface in the width direction of the terminal body while further expanding the inner peripheral surface of the mounting hole. Since a part of the synthetic resin located in the region of the inner peripheral surface of the resin moves toward the locking projection while being deformed by the pressing force of the resin pressing projection, it is formed behind the locking projection that has slid. As a result of the gap being filled with the synthetic resin, the press-fit terminal is strongly held in the mounting hole of the housing. Therefore, the press-fit terminal of the present invention can exhibit a strong holding force even for a housing formed of a brittle synthetic resin with low toughness.

  Further, the press-fit terminal of the present invention is formed with two pairs of locking projections protruding in the width direction of the terminal body along the press-fit direction of the terminal body on both side edges of the band plate-like terminal body. In the press-fitting terminal, the protruding height of the second locking protrusion positioned rearward in the press-fitting direction is made higher than the protruding height of the first locking protrusion positioned forward, and the first locking protrusion and the second locking protrusion A trough between the protrusions is located outside the side edge of the terminal body in the width direction. Here, the “projection height” refers to the projecting dimension in the width direction of the band-shaped terminal body.

  With such a configuration, when the press-fit terminal according to the present invention is press-fitted into the mounting hole of the synthetic resin housing, the region after the first locking projection has passed through the inner peripheral surface of the mounting hole is the first The second locking projection protruding higher than the locking projection passes while expanding the inner peripheral surface of the mounting hole, and in this process, a part of the synthetic resin located in the region of the inner peripheral surface of the mounting hole is the first. 2 Move toward the first locking projection while being deformed by the pressing force of the locking projection. At this time, since the valley portion between the first locking projection and the second locking projection is located outside the side edge portion of the terminal body in the width direction, the valley portion is shallow, and thus pressed. Synthetic resin is densely filled in the valley, and the press-fit terminal is strongly held in the mounting hole of the housing. Therefore, the press-fit terminal can exert a strong holding force even on a housing formed of a brittle synthetic resin having low toughness.

  In this case, a resin pressing protrusion protruding higher than the second locking protrusion can be provided behind the second locking protrusion. With such a configuration, in the process of press-fitting the press-fit terminal into the mounting hole of the synthetic resin housing, a part of the synthetic resin located on the inner peripheral surface of the mounting hole behind the second locking projection is resin. Since it moves toward the second locking projection while being deformed by the pressing force of the pressing projection, the gaps formed behind the first locking projection and the second locking projection are filled with the synthetic resin, respectively. The holding force with respect to the mounting hole can be increased.

  In addition, the resin pressing protrusion includes a pressing portion that forms an upward gradient from the front to the rear in the press-fitting direction, and an escape portion that forms a downward gradient from the front to the rear in the press-fitting direction at the rear of the pressing portion. It is desirable to have.

  With such a configuration, when the resin pressing protrusion spreads the inner peripheral surface of the mounting hole during the press-fitting process into the mounting hole of the housing, the synthetic resin located on the inner peripheral surface is efficiently deformed. However, since it moves toward the front, the gap formed in front of the resin pressing protrusion can be filled with the synthetic resin without any gap, which is effective in improving the holding power. The pressing portion of the resin pressing protrusion is preferably formed so as to be continuous with a rear edge portion of the locking protrusion positioned immediately before the resin pressing protrusion via a valley portion.

  On the other hand, it is desirable to provide a smooth portion substantially parallel to the press-fitting direction in the top region of the locking projection. With such a configuration, it is possible to reduce resistance when the press-fit terminal is press-fitted into the mounting hole of the housing.

  Moreover, it is desirable that the angle at the top of the resin pressing protrusion is an acute angle. With such a configuration, the resin pressing projections can have a biting action on the inner peripheral surface of the mounting hole of the housing, which is effective in improving the holding force.

  According to the present invention, it is possible to provide a press-fit terminal exhibiting a strong holding force even with respect to a housing formed of a brittle synthetic resin with low toughness.

It is a partially omitted plan view of a press-fit terminal according to an embodiment of the present invention. FIG. 2 is a partially enlarged view of FIG. 1. FIG. 3 is a partially omitted plan view showing a press-fitting process of the press-fitting terminal shown in FIG. 1. FIG. 3 is a partially omitted plan view showing a press-fitting process of the press-fitting terminal shown in FIG. 1. FIG. 3 is a partially omitted plan view showing a press-fitting process of the press-fitting terminal shown in FIG. 1. FIG. 3 is a partially omitted plan view showing a press-fitting process of the press-fitting terminal shown in FIG. 1. FIG. 7 is a partially enlarged view of FIG. 6. FIG. 2 is a partially omitted plan view showing a press-fit completion state of the press-fit terminal shown in FIG. 1. It is a perspective view which shows an electrical connector. It is a perspective view which shows an electrical connector. It is a partially omitted plan view showing a press-fit terminal according to a second embodiment of the present invention. It is a partially omitted plan view showing a press-fit terminal according to a third embodiment of the present invention.

  As shown in FIG. 1, in the press-fit terminal 100 according to the present embodiment, the first locking projection 101 and the second engagement projecting in the width direction W of the terminal body 105 are formed on both side edges 104 of the band plate-like terminal body 105. Resin pressing protrusions 102 are formed side by side along the press-fitting direction P of the terminal body 105 and protrude higher than the second locking protrusions 102 behind the second locking protrusions 102 located behind the press-fitting direction P. 103 is provided.

  As shown in FIG. 2, smooth portions 101p and 102p that are substantially parallel to the press-fit direction P are provided in the top regions of the first lock protrusion 101 and the second lock protrusion 102, respectively, and the press-fit direction of the smooth portions 101p and 102p In front of P, sloped portions 101s and 102s are formed so as to rise upward from the front in the press-fit direction P, and behind the smooth portions 101p and 102p, a locking portion 101r perpendicular to the press-fit direction P is provided. , 102r are provided.

  Similarly, as shown in FIG. 2, the resin pressing protrusion 103 includes a pressing portion 103p that forms an upward gradient from the front to the rear in the press-fitting direction P, and the front to the rear in the press-fitting direction P behind the pressing portion 103p. And an escape portion 103e having a downward slope. Further, the angle 103a of the top 103t of the resin pressing projection 103 is formed at an acute angle.

  As shown in FIGS. 3 to 6, when the press-fit terminal 100 is pushed along the press-fit direction P into the mounting hole 11 formed in the synthetic resin housing 10, the first locking protrusion 101 of the press-fit terminal 100, The second locking protrusions 102 and the resin pressing protrusions 103 move in this order while expanding the inner peripheral surface 11a of the mounting hole 11 in the width direction W. At this time, on the inner peripheral surface 11 a of the mounting hole 11, the region after the first locking projection 101 passes through the inner peripheral surface 11 a of the mounting hole 11 while spreading is passed through the second locking projection 102 and the second engagement. The resin pressing protrusion 103 protruding higher than the stop protrusion 102 passes through the inner peripheral surface 11a of the mounting hole 11 while further expanding.

  In this process, as shown in FIG. 7, the region is located in the region of the inner peripheral surface 11 a of the mounting hole 11 (the region after the first locking projection 101 has passed through the inner peripheral surface 11 a of the mounting hole 11 while spreading). Part of the synthetic resin Hp to be moved moves toward the first locking protrusion 101 and the second locking protrusion 102 while being deformed by the pressing force of the second locking protrusion 102 and the resin pressing protrusion 103.

  As a result, as shown in FIG. 8, when the press-fit of the press-fit terminal 100 is completed, the first locking protrusion 101 and the second locking protrusion 102 pass while expanding the inner peripheral surface 11 a of the mounting hole 11. The gaps 101v and 102v (see FIG. 7) formed at the rear are filled with the synthetic resin Hp, and the press-fit terminal 100 is strongly held in the mounting hole 11a of the housing 10. Therefore, even if the housing 10 is formed of a brittle synthetic resin (for example, SPS) having low toughness, the press-fit terminal 100 of this embodiment can exhibit a strong holding force.

  Further, as shown in FIG. 7, smooth portions 101p and 102p that are substantially parallel to the press-fitting direction P are provided in the top regions of the first locking projections 101 and the second locking projections 102. The resistance when press-fitting into the mounting hole 11 of the housing 10 can be reduced.

  On the other hand, a pressing portion 103p that forms an upward gradient from the front in the press-fitting direction P to the resin pressing protrusion 103, and a relief that forms a downward gradient from the front to the rear in the press-fitting direction P behind the pressing portion 103p. By providing the portion 103e, the synthetic resin Hp located on the inner peripheral surface 11a is efficiently deformed when the resin pressing protrusion 103 expands the inner peripheral surface 11a of the mounting hole 11 of the housing 10. However, since it moves toward the front, the gap 102v formed in front of the resin pressing projection 103 can be filled with the synthetic resin Hp without any gap, which is effective in improving the holding force.

  Since the angle 103a of the top 103t of the resin pressing projection 103 is an acute angle (80 degrees), the top 103t of the resin pressing projection 103 is attached to the housing 10 after the press-fitting is completed as shown in FIG. It is in a state of biting into the inner peripheral surface 11a of the hole 11 and is effective in improving the holding power. In addition, since the angle 103a is not limited to 80 degrees, it can also be set to 60 degrees to 90 degrees, for example.

  As described above, the electrical connector 50 as shown in FIGS. 9 and 10 can be formed by press-fitting the press-fit terminal 100 into the mounting hole 11 provided in the housing 10. The material of the housing 10 is not limited, but the press-fit terminal 100 exhibits an excellent holding force even if it is a synthetic resin such as SPS.

  Next, the press-fit terminals 200 and 300 according to the second and third embodiments of the present invention will be described with reference to FIGS. In FIGS. 11 and 12, the portions denoted by the same reference numerals as those in FIGS.

  In the press-fit terminal 200 shown in FIG. 11, a pair of locking projections 201 projecting in the width direction W of the terminal body 205 are formed on both side edge portions 204 of the band plate-like terminal body 205, and rearward (in the press-fit direction P). A resin pressing projection 203 projecting higher than the locking projection 201 is provided on the rear side, and a valley V between the locking projection 201 and the resin pressing projection 203 is formed in the width direction W from the side edge portion 204 of the terminal body 205. Outside (a portion away from the side edge portion 204 in the width direction W). Further, the shape and function of the locking projection 201 and the resin pressing projection 203 in plan view are the same as those of the first locking projection 101 and the resin pressing projection 103 shown in FIG.

  When the press-fit terminal 200 is press-fitted into the mounting hole of the synthetic resin housing, the resin pressing projection 203 projecting higher than the locking projection 201 is formed in the area after the locking projection 201 passes on the inner peripheral surface of the mounting hole. Passing while expanding the inner peripheral surface of the mounting hole, in this process, a part of the synthetic resin located in the region of the inner peripheral surface of the mounting hole is locked while being deformed by the pressing force of the resin pressing protrusion 203 It moves toward the protrusion 201. At this time, since the valley portion V is shallower than the side edge portion 204 of the terminal body 205 in the width direction W, the pressed synthetic resin is densely filled into the valley portion V. As a result, the press-fit terminal 200 is strongly held in the housing mounting hole.

  In the press-fit terminal 300 shown in FIG. 12, the first locking protrusion 301 and the second locking protrusion 302 that protrude in the width direction W of the terminal body 305 are formed in the press-fitting direction P on both side edges 304 of the strip-shaped terminal body 305. The protruding height of the second locking projection 302 located rearward is higher than the protruding height of the first locking projection 301 positioned forward, and behind the second locking projection 302. A resin pressing protrusion 303 protruding higher than the second locking protrusion is provided.

  Further, the valley V1 between the first locking projection 301 and the second locking projection 302 and the valley V2 between the second locking projection 302 and the resin pressing projection 303 are wider than the side edge portion 304 in the width direction. It is located outside W (part away from the side edge 304). The first locking projections 301, the second locking projections 302, and the resin pressing projections 303 have the same shape and function as seen in plan view. 103.

  When the press-fit terminal 300 is press-fitted into the mounting hole of the synthetic resin housing, the areas after the first locking projections 301 and the second locking projections 302 have passed through the inner peripheral surface of the mounting hole are respectively the first engagement. The second locking protrusion 302 protruding higher than the locking protrusion 301 and the resin pressing protrusion 303 protruding higher than the second locking protrusion 302 pass while sliding.

  In this process, a part of the synthetic resin located in the region on the inner peripheral surface of the mounting hole is deformed by the pressing force of the second locking protrusion 302 and the resin pressing protrusion 303, and the first locking protrusion 301 and the second Although it moves toward the locking projection 302, the valley portions V1, V2 are located on the outer side in the width direction W from the side edge portion 304, thereby forming a relatively shallow shape. As a result of filling the valleys V1 and V2, the press-fit terminal 300 is strongly held in the mounting hole of the housing.

  The press-fit terminal of the present invention can be widely used in various fields such as the electric / electronic industry and the automobile industry as a component of an electric connector for various electric / electronic devices or an in-vehicle electric connector.

DESCRIPTION OF SYMBOLS 10 Housing 11 Mounting hole 11a Inner peripheral surface 50 Electrical connector 100,200,300 Press-fit terminal 101,301 1st latching protrusion 101p, 102p Smooth part 101r, 102r Locking part 101s, 102s Inclined part 102,302 2nd latching Protrusion 103, 203, 303 Resin pressing protrusion 103a Angle 103e Relief part 103p Pressing part 104, 204, 304 Side edge part 105, 205, 305 Terminal body 201 Locking protrusion Hp Synthetic resin P Pressing direction V, V1, V2 Valley part W width direction

Claims (6)

  In the press-fit terminal in which at least a pair of locking projections projecting in the width direction of the terminal body is formed on both side edges of the band-plate-shaped terminal body, the locking projection is disposed on the rear side of the terminal body in the press-fitting direction. A press-fit terminal provided with a resin pressing protrusion protruding higher than a locking protrusion.   A press-fit terminal in which two pairs of locking projections projecting in the width direction of the terminal body are formed side by side along the press-fit direction of the terminal body on both side edges of the strip-shaped terminal body. The protruding height of the second locking projection located at the front is higher than the protruding height of the first locking projection positioned forward, and the trough between the first locking projection and the second locking projection is A press-fit terminal, wherein the press-fit terminal is positioned on an outer side in the width direction from a side edge portion of the terminal body.   The press-fit terminal according to claim 2, wherein a resin pressing protrusion protruding higher than the second locking protrusion is provided behind the second locking protrusion.   The resin pressing protrusion has a pressing part that forms an upward gradient from the front in the press-fitting direction, and a relief part that forms a downward gradient from the front to the rear in the press-fitting direction at the rear of the pressing part, The press-fit terminal according to claim 1 or 3, wherein:   The press-fit terminal according to any one of claims 1 to 4, wherein a smooth portion that is substantially parallel to the press-fit direction is provided in a top region of the locking projection.   The press-fit terminal according to any one of claims 1 to 5, wherein an angle of a top portion of the resin pressing protrusion is an acute angle.

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