JP2015220190A - Crimp terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crimp terminal which has high contact reliability by preventing a load from being applied to a spring piece even if a cable is flapped and external force is applied from the cable to the displacement direction of the spring piece.SOLUTION: Disclosed is a crimp terminal 30 which is formed of a plate material. This crimp terminal includes: a spring piece 31 in contact with a mating terminal 51; a crimp part 32 to which a cable 40 is crimped and fixed; and a U-shaped part 33 having a U-shaped cross section. The spring piece 31 is connected to one end of a U-shape of the U-shaped part 33 via a bent part 34 and formed by being extended so as to be along one straight line part 33a of the U-shape of the U-shaped part 33. The crimp part 32 is formed by being extended from the other straight line part 33b of the U-shape of the U-shaped part 33. The mating terminal 51 is inserted between the spring piece 31 and one straight line part 33a of the U-shape. The U-shaped part 33 absorbs external force from the cable 40.

Description

  The present invention relates to a crimp terminal that is crimped to a terminal of a cable and electrically connected to a counterpart terminal.

  FIG. 6 shows the structure of a terminal described in Patent Document 1 as a conventional example of this type of crimp terminal.

  The terminal 10 includes a terminal body 11 formed at one end, a first crimping part 12 formed at the other end, and a second crimping part 13 formed between the terminal body 11 and the first crimping part 12. In addition, a protrusion 14 is provided between the terminal body 11 and the second crimping part 13.

  The first crimping portion 12 is crimped and connected to the insulating coating portion 21 of the conductor 20, and the second crimping portion 13 is crimped and connected to the conductor portion 22 of the conductor 20. The terminal body 11 is electrically connected to another connector (not shown), has a cylindrical shape, and includes a spring piece 15 inside. The spring piece 15 is in contact with the terminal of the mating connector.

  A resin 25 is applied to a portion where the conductor portion 22 and the second crimp portion 13 are crimped and connected. In this example, the crimp connection portion between the conductor portion 22 and the second crimp portion 13 is sealed by the resin 25. Has been. The resin 25 is prevented from flowing out toward the terminal body 11 by the protrusions 14.

Japanese Patent Application Laid-Open No. 2011-142004

  By the way, in the use state which connected this kind of crimp terminal to the other party terminal, high contact reliability with the other party terminal is requested | required.

  However, in the conventional crimp terminal structure as shown in FIG. 6, since the crimped portion of the cable (conductor) is located on the extended line of the portion where the spring piece is located, for example, the cable is wound and the spring piece When an external force is applied from the cable in the displacement direction, a load is directly applied to the spring piece, and the contact pressure of the spring piece fluctuates, resulting in a situation where contact reliability is impaired.

  In view of such problems, the object of the present invention is to prevent the spring piece from being affected and loaded even if an external force is applied from the cable in the displacement direction of the spring piece in contact with the counterpart terminal. Then, it is providing the crimp terminal which has the contact reliability excellent in the point.

  According to invention of Claim 1, the crimp terminal which consists of board | plate materials is equipped with the spring piece which contacts an other party terminal, the crimp part to which a cable is crimp-fixed, and the U-shaped part which makes | forms a cross-section U-shape, and a spring piece Is connected to one end of the U-shaped portion of the U-shaped portion via a bent portion and is formed to extend along one straight portion of the U-shaped portion of the U-shaped portion, and the crimping portion is the other straight line of the U-shaped portion of the U-shaped portion. The mating terminal is inserted between the spring piece and one of the U-shaped straight portions of the U-shaped portion.

  In the invention of claim 2, in the invention of claim 1, a lock piece that fits into a hole formed in the counterpart terminal is cut and raised on one linear part of the U-shaped U-shaped part. Is done.

  In the invention of claim 3, in the invention of claim 1 or 2, the crimping portion is provided so that the extending direction of the crimped and fixed cable is parallel to the direction in which the counterpart terminal is inserted.

  In the invention of claim 4, in the invention of claim 1 or 2, the crimping portion is provided so that the extending direction of the cable fixed by crimping is orthogonal to the direction in which the mating terminal is inserted.

  According to the present invention, even when an external force is applied from the cable in the displacement direction of the spring piece, the U-shaped portion bends and absorbs the external force from the cable, so that the spring piece is not loaded. Further, the contact pressure of the spring piece does not fluctuate, so that a crimp terminal having excellent contact reliability can be obtained.

A is a front view showing a first embodiment of a crimp terminal according to the present invention, B is a side view thereof, C is a rear view thereof, D is a bottom view thereof, E is a perspective view thereof, and F is a HH line of A. An expanded sectional view, G is an JJ line expanded sectional view of A. 1A is a perspective view showing a state before the crimp terminal shown in FIG. 1 to which the cable is crimped and fixed is connected to the counterpart terminal, and B is a perspective view showing the connection state. FIG. 2A is a partially enlarged view of FIG. 2B, FIG. 2B is a plan view showing a state when A is viewed from above, and C is a partially enlarged sectional view taken along line DD of B. FIG. A is a perspective view showing a state before the second embodiment of the crimp terminal according to the present invention, in which the cable is crimped and fixed, is connected to the counterpart terminal, and B is a perspective view showing the connection state. A is a front view showing a third embodiment of the crimp terminal according to the present invention, B is a side view thereof, and C is an enlarged sectional view taken along line DD of A. FIG. A is a perspective view showing a conventional crimp terminal in which a conductor is fixed by crimping, and B is a sectional view thereof.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows the construction of a first embodiment of a crimp terminal according to the present invention. The crimp terminal 30 is made of a plate material, and includes a spring piece 31 that comes into contact with the mating terminal, a crimp part 32 to which the cable is crimped and fixed, and a U-shaped part 33 having a U-shaped cross section.

  The spring piece 31 is connected to one end of the U-shaped portion 33 of the U-shaped portion 33 via a bent portion 34 that is bent by 180 °, and is extended along one U-shaped straight portion 33 a of the U-shaped portion 33. The spring piece 31 and the U-shaped portion 33 have a shape that is overlapped in the displacement direction of the spring piece 31. In this example, the spring piece 31 is branched by a notch 35 to form a bifurcated shape, and each tip of the bifurcated portion is bent back to the straight portion 33a side of the U-shaped portion 33 to form a contact portion 31a. Yes.

  A lock piece 36 is cut and raised so as to protrude toward the spring piece 31 on the straight portion 33 a of the U-shaped portion 33 facing the spring piece 31. The lock piece 36 is provided at a position facing the notch 35 between the two forks of the spring piece 31. Protruding pieces 37 are formed at both ends in the width direction of the straight portion 33 a of the U-shaped portion 33. The protruding piece 37 has a shape that is slightly extended from the straight portion 33a and then bent 90 ° toward the spring piece 31 side.

  The crimping portion 32 is formed to extend from the other U-shaped straight portion 33b of the U-shaped portion 33. In this example, the crimping portion 32 is formed to extend from one end in the width direction of the straight portion 33b. The crimping part 32 includes a pair of crimping pieces 32a to be crimped to the inner conductor of the cable and a pair of crimping pieces 32b to be crimped to the jacket of the cable.

  In FIG. 1, the arrow a indicates the position and direction in which the counterpart terminal is inserted, and the counterpart terminal is inserted between the spring piece 31 and one straight portion 33 a of the U-shaped portion 33.

  The crimp terminal 30 having the above-described configuration is formed, for example, by subjecting a phosphor bronze plate to sheet metal processing, and the surface is subjected to gold plating or tin plating.

  FIG. 2 shows a state in which the crimp terminal 30 attached to the end of the cable 40 is connected to the counterpart terminal, FIG. 2A shows a state before connection, and FIG. 2B shows a connection state. FIG. 3 shows details of a state in which the crimp terminal 30 is connected to the counterpart terminal.

  In the crimp terminal 30, a pair of crimp pieces 32 a are crimped and fixed to the inner conductor 41 of the cable 40, and a pair of crimp pieces 32 b are crimped and fixed to the jacket 42 of the cable 40 and attached to the end of the cable 40.

  In this example, the terminal 51 of the motor 50 is shown as the counterpart terminal. The terminals 51 are plate-shaped, and the pair of terminals 51 protrude from the end face of the motor 50. A circular hole 51 a is provided in the center of the terminal 51. The terminal 51 is made of, for example, a copper plate, and the surface thereof is plated with gold or tin. 2 and 3 show a state in which the crimp terminal 30 is connected to one of the pair of terminals 51.

  The terminal 51 is inserted between the spring piece 31 of the crimp terminal 30 and one straight portion 33 a of the U-shaped portion 33. The spring piece 31 is displaced as shown in FIG. 3C, and the contact portion 31a contacts the plate surface of the terminal 51 by the spring force (elastic restoring force). The terminal 51 is sandwiched between the spring piece 31 and the straight portion 33 a of the U-shaped portion 33, and is pressed against the straight portion 33 a of the U-shaped portion 33 by the spring piece 31.

  The lock piece 36 is pushed by the terminal 51 by the insertion of the terminal 51 and retracted, and then returned to fit into the hole 51a of the terminal 51 as shown in FIG. 3C. Thus, when the lock piece 36 fits into the hole 51 a of the terminal 51, the crimp terminal 30 is prevented from coming off, and once connected to the terminal 51, it cannot be removed.

  In this example, since the crimp terminal 30 includes the U-shaped portion 33 between the spring piece 31 and the crimp portion 32 as described above, for example, the cable 40 is twisted while being connected to the terminal 51, as shown in FIGS. In the middle, the cable 40 moves in the direction indicated by the arrow b (displaces in parallel). As a result, even if an external force is applied from the cable 40 to the crimp terminal 30 in the displacement direction of the spring piece 31, The external force from 40 can be absorbed by the U-shaped portion 33.

  Therefore, according to this example, even if the cable 40 is twisted and an external force is applied from the cable 40 in the displacement direction of the spring piece 31, the spring piece 31 is not affected by this, so the conventional crimp terminal shown in FIG. When an external force is applied from the cable in the direction of displacement of the spring piece, the problem that the spring piece is directly loaded and the contact pressure of the spring piece fluctuates can be solved. High contact stability and contact reliability can be obtained.

  The pair of protruding pieces 37 provided on the crimp terminal 30 abuts against the terminal 51 when the crimp terminal 30 moves in the direction of the arrow c shown in FIGS. Thus, the crimp terminal 30 is restricted from moving in the direction of the arrow c. Therefore, for example, when the cable 40 is pulled, in addition to the lock piece 36, the protruding piece 37 also functions as a stopper for the crimp terminal 30.

  In the crimp terminal 30 described above, the crimp part 32 is formed to extend from one end in the width direction of the straight part 33 b of the U-shaped part 33, and the extending direction of the cable 40 fixed by crimping is orthogonal to the insertion direction (arrow a) of the counterpart terminal 51. However, the crimping portion 32 may be provided so that the extending direction of the cable 40 is parallel to the insertion direction (arrow a) of the terminal 51.

  FIG. 4 shows a state in which the second embodiment of the crimp terminal according to the present invention provided with the crimp portion 32 is connected to the terminal 51 of the motor 50 as in FIG. 2 described above.

  In this example, the crimping part 32 is extended from the tip of the straight part 33 b of the U-shaped part 33, and is in a state of standing parallel to the insertion direction (arrow a) of the terminal 51.

  Also in the crimp terminal 30 ′ shown in FIG. 4, even when the cable 40 is twisted and an external force is applied from the cable 40 in the displacement direction of the spring piece 31, the external force from the cable 40 is absorbed by the U-shaped portion 33. High contact stability and contact reliability can be obtained.

  FIG. 5 shows the configuration of a third embodiment of the crimp terminal according to the present invention. In this example, the crimp terminal 30 shown in FIG. 1 is different from the shape of the spring piece and the bent portion.

  In this example, the spring piece 31 'is not bifurcated, and the contact portion 31a is not divided into two portions. Further, the bent portion 34 ′ has a straight portion in the middle, so that the space between the spring piece 31 ′ and the straight portion 33 a of the U-shaped portion 33 is wider than the crimp terminal 30 shown in FIG. 1.

  This crimp terminal 30 '' corresponds to the case where the plate thickness of the mating terminal to be connected is thick, and when the distance between the spring piece 31 'and the straight portion 33a of the U-shaped portion 33 is large as described above, the spring piece Since it is not necessary to consider the interference between the contact portion 31a of 31 'and the lock piece 36, a notch 35 is provided to avoid interference with the lock piece 36 as in the crimp terminal 30 shown in FIG. It is not particularly necessary to make 31 a bifurcated shape. However, in order to obtain a good contact state between the spring piece 31 ′ and the counterpart terminal, it is preferable that the spring piece 31 ′ has a bifurcated shape so as to make a two-point contact.

  As mentioned above, although the Example of this invention was described, the other party terminal is what is inserted between a spring piece and one linear part of a U-shaped part, and the tip of the part into which this other party terminal is inserted. Since the bent portion 34 (34 ') exists, even if the counterpart terminal is inserted excessively, the tip end hits the bent portion 34 (34'). Therefore, it does not occur that the counterpart terminal penetrates the crimp terminal and the tip protrudes from the crimp terminal, and an unexpected accident such as a short circuit can be prevented in that respect.

  In the above-described embodiment, the bent portion 34 (34 ′) is bent by 180 °, but the spring piece 31 (31 ′) may be arranged along the straight portion 33a of the U-shaped portion 33. The bent portion 34 (34 ′) may not be strictly bent by 180 °.

DESCRIPTION OF SYMBOLS 10 Terminal 11 Terminal main body 12 1st crimping part 13 2nd crimping part 14 Protrusion part 15 Spring piece 20 Conductor 21 Insulation coating | cover part 22 Conductor part 25 Resin 30,30 ', 30''Crimping terminal 31,31' Spring piece 31a Contact Part 32 Crimping part 32a, 32b Crimping piece 33 U-shaped part 33a, 33b Straight line part 34, 34 'Bending part 35 Notch 36 Locking piece 37 Protruding piece 40 Cable 41 Inner conductor 42 Jacket 50 Motor 51 Terminal 51a Hole

Claims (4)

A crimp terminal made of a plate material,
A spring piece that comes into contact with the mating terminal, a crimping portion to which the cable is crimped and fixed, and a U-shaped portion having a U-shaped cross section;
The spring piece is connected to one end of the U-shaped portion of the U-shaped portion via a bent portion, and is formed to extend along one linear portion of the U-shaped portion of the U-shaped portion,
The crimping portion is extended from the other straight portion of the U-shape of the U-shape,
The crimp terminal, wherein the counterpart terminal is inserted between the spring piece and one U-shaped straight portion of the U-shaped portion. The crimp terminal according to claim 1,
A crimp terminal, wherein a locking piece that fits into a hole formed in the counterpart terminal is cut and raised on one straight line portion of the U-shape of the U-shaped portion. The crimp terminal according to claim 1 or 2,
The crimping terminal is characterized in that the crimping portion is provided so that the extending direction of the cable fixed by crimping is parallel to the direction in which the counterpart terminal is inserted. The crimp terminal according to claim 1 or 2,
The crimping terminal is characterized in that the crimping portion is provided so that the extending direction of the cable fixed by crimping is orthogonal to the direction in which the counterpart terminal is inserted.

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