CN105284011B - Female end - Google Patents

Abstract

The electrical contact portion (15) of the female terminal (11) includes: a first side wall (37) and a second side wall (39) standing up from both ends of the bottom wall (31) in the terminal width direction; The spring sheet whose wall (37) is continuously bent; it is continuously bent with the second side wall (39), and overlaps the top wall (43) on the outside of the spring sheet; it is continuously bent with the top wall (43) Processing, overlapping the anti-opening sheet (45) on the outside of the first side wall (37); and being continuously bent and processed with the anti-opening sheet (45), locked to the first side wall (37) The locking part (49) of the receiving hole (47).

Description

female terminal

technical field

The present invention relates to female terminals.

Background technique

A connection terminal is known which is attached to an end portion of a wiring cord and is freely inserted and fixed in a housing of a connector without detachment (see Patent Document 1 and the like).

The connecting terminal 501 shown in Fig. 7 (a), (b) is a female terminal, and its terminal main body (electrical contact part) 503 is formed into a long box shape by bending a metal plate into an approximately square tube shape. . On the front side of the upper wall piece 505 of the terminal main body 503 , there is formed a locking lance 507 which engages with a part of it when inserted into the housing of the connector (not shown) to prevent disengagement. On the upper wall piece 505 of the terminal main body 503 behind the free end 509 of the locking lance 507, a roll-over preventing portion 511 is formed. The turning preventing portion 511 is formed by placing a part of the upper wall piece 505 of the terminal main body 503 (right side in FIG. A part of the wall 513) is formed by further bending upward and protruding. The center of the lower surface of the turning preventing portion 511 is placed on the upper surface of the rising piece 517 bent into an L shape of the left side wall piece 515 of the terminal main body 503, and the end portion 519 of the turning preventing portion 511 is placed on the left side. The horizontal bending portion 521 of the side wall piece 515 prevents the roll-over preventing portion 511 from deforming downward.

prior art literature

patent documents

Patent Document 1: Japanese Patent Application Laid-Open No. 11-67321

Contents of the invention

The problem that the present invention intends to solve

However, in the above-mentioned connecting terminal 501 including the box-shaped terminal body 503, the end portion 519 of the roll-up prevention portion 511 is placed on the horizontal bending portion 521 of the left side wall piece 515, and the downward deformation of the roll-up prevention portion 511 is prevented. The upward deformation of the upper wall piece 505 and the roll-up preventing portion 511 cannot be prevented. When the upper wall piece 505 and the roll-over preventing portion 511 are deformed upward, the contact between the spring piece (not shown) arranged in the insertion space 523 of the terminal body 503 and the male terminal (not shown) inserted in the insertion space 523 The load will drop, and stable electrical conduction may not be achieved.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a female terminal capable of stable electrical conduction without reducing the contact load.

solutions to problems

The above objects related to the present invention are achieved by the following configurations.

(1) A female terminal, a box-shaped electrical contact portion into which a male terminal is inserted includes: a bottom wall; a first side wall and a second side wall, which stand up from both ends of the bottom wall in the terminal width direction; The spring piece is continuously bent from the first side wall and extends in the male terminal insertion direction opposite to the bottom wall; the top wall is continuously bent from the second side wall and overlaps with the second side wall. The outer side of the spring piece; the anti-opening piece, which is continuously bent and processed with the top wall, and overlaps the outer side of the first side wall; and the locking part, which is continuously bent with the described anti-opening piece It is bent and locked to the receiving hole pierced through the first side wall.

According to the female terminal having the configuration of (1) above, the spring piece comes into elastic contact with the male terminal inserted into the electric contact portion. The load of the spring piece elastically contacting the male terminal is supported by the top wall superimposed on the outer side of the spring piece. When the top wall receives a load from the spring piece, the edge portion of the top wall on the side of the curved end tends to deform in a direction away from the first side wall. That is, the top wall of the box-shaped electrical contact portion is intended to be opened. At this time, since the locking portion of the anti-opening piece overlapping the outer side of the first side wall from the edge of the top wall is inserted into and locked into the receiving hole of the first side wall, the direction in which the top wall is separated from the first side wall is prevented. deformation. Accordingly, the female terminal increases the engagement force for maintaining the box shape of the electrical contact portion. As a result, even if the male terminal is received, the electrical contact portion does not open, and a sufficient contact load by the spring piece is obtained.

In addition, the electric contact portion provided with the anti-opening piece has an asymmetrical shape on the left and right, sandwiching the imaginary center line passing through the insertion center of the male terminal. Therefore, the female terminal accommodating chamber of the female housing in which the female terminal is accommodated also has an asymmetrical shape on both sides of the imaginary center line. Thereby, it is also possible to obtain an incorrect insertion preventing effect, and prevent insertion of the female terminal when it is inserted into the female housing in an irregular orientation.

(2) In the female terminal having the configuration of (1) above, a convex portion serving as a fulcrum when the spring piece abuts against the male terminal and bends is formed protruding from the top wall toward the spring piece, so The anti-opening piece and the receiving hole are arranged so as to coincide with the position of the protrusion in the extending direction of the spring piece.

According to the female terminal having the configuration of (2) above, the convex portion of the top wall to which the contact load from the spring piece is applied, the locking portion and the receiving hole for preventing the top wall from opening are arranged in the same cross section perpendicular to the male terminal insertion direction. . This prevents the torsional deformation of the top wall when the convex portion, the lock portion, and the receiving hole are arranged at positions deviated from the male terminal insertion direction, and the fixing of the top wall is more reliable.

(3) It is the female terminal of the configuration of (1) or (2), and the included angle between the anti-opening piece and the locking part is an acute angle.

According to the female terminal with the configuration of (3) above, the locking portion is at an acute angle with respect to the anti-opening piece, so that when a force in the opening direction is applied to the top wall, the locking portion will be stuck in the receiving hole more strongly, or act deeper. The force component in the direction of insertion. Thereby, it becomes difficult for the lock part to disengage from the receiving hole, and the fixation of the top wall becomes more reliable.

The effect of the invention

According to the female terminal according to the present invention, stable electrical conduction can be performed without reducing the contact load.

The present invention has been briefly described above. Further, details of the present invention will be further clarified by reading through the specific embodiments described below (hereinafter referred to as "embodiments") with reference to the accompanying drawings.

Description of drawings

1( a ) is a perspective view from above of a female terminal according to an embodiment of the present invention; FIG. 1( b ) is a perspective view from below of the female terminal shown in FIG. 1( a ).

Fig. 2(a) and Fig. 2(b) are side view and front view of the female terminal shown in Fig. 1(a) and (b).

Fig. 3 is a III-III sectional view of the female terminal shown in Fig. 2(b).

Fig. 4 is a sectional view along IV-IV of the female terminal shown in Fig. 2(a).

FIG. 5 is an enlarged view of main parts of the female terminal shown in FIG. 4 .

6 is a transverse cross-sectional view showing a state in which the female terminal shown in FIG. 4 is housed in a female housing.

7( a ) is a perspective view in which a part of a conventional connection terminal is cut away; FIG. 7( b ) is an X-X cross-sectional view of the connection terminal shown in FIG. 7( a ).

Explanation of reference signs

11...female terminal

13...male terminal

15...Electric contact part

31...bottom wall

37...1st side wall

39...2nd side wall

41…spring leaf

43…top wall

45…Anti-opening sheet

47…Accepting hole

49...Locking part

55...Convex part

detailed description

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

As shown in FIGS. 1 to 2 , a female terminal 11 according to an embodiment of the present invention includes: a box-shaped electrical contact portion 15 into which a male terminal 13 (see FIG. 3 ) is inserted; The core wire crimping part 17 (also referred to as a wire barrel) and the sheathing crimping part 19 (also called an insulating barrel) arranged side by side. These electrical contact parts 15, core wire crimping parts 17 and sheathing crimping parts 19 are integrally formed into various parts of the female terminal 11 by bending a single unfolded blank. A conductive metal plate is punched out in a predetermined shape.

The core wire caulking portion 17 has a pair of core wire caulking pieces 21 whose standing ends are opened. Dimples 23 are formed on opposing inner surfaces of the core wire caulking piece 21 . The dimples 23 improve the conduction contact with the core wire of the unshown covered electric wire and the crimping strength. In addition, serrations 25 are provided on the front and rear sides of the opposing inner surfaces of the core wire caulking piece 21 to improve the retainability of the core wire.

The skin-clad caulking portion 19 has a pair of skin-clad caulking pieces 27 whose upstanding ends are opened. In addition, in this specification, with regard to the female terminal 11, the side where the male terminal 13 is inserted (the left side in FIG. 3 ) is the front, and the opposite side (the right side in FIG. 3 ) is the rear. The side (upper side in FIG. 3 ) that is opened from the covering caulking portion 19 will be described as upward, and the opposite side (lower side in FIG. 3 ) will be described as downward.

The electrical contact portion 15 is formed in a substantially box-like rectangular parallelepiped shape, and the inside thereof is an insertion space 29 for the male terminal 13 . The bottom wall 31 of the electrical contact portion 15 is formed with a terminal locking protrusion 33 and a locking lance hole 35 which are locked with a housing locking lance (not shown).

The box-shaped electrical contact portion 15 includes: a bottom wall 31; a first side wall 37 and a second side wall 39 standing up from both ends of the bottom wall 31 in the terminal width direction; continuous with the first side wall 37 and bent , the spring piece 41 extending in the male terminal insertion direction (the left-right direction of FIG. 3 ) opposite to the bottom wall 31; it is continuous with the second side wall 39 and is bent, overlapped on the outside of the spring piece 41 and covers the upper opening 65 ( With reference to the top wall 43 of Fig. 4); Be bent continuously with top wall 43, overlap the anti-open box sheet 45 on the outside of the first side wall 37; The locking portion 49 provided in the receiving hole 47 of the first side wall 37 locks.

The spring piece 41 of this embodiment is configured to be bent at a right angle from one end 51 in the extending direction on the rear end side of the first side wall 37 toward the second side wall 39 , and to face the bottom wall 31 along the The insertion direction of the male terminal extends elongatedly in the shape of a cantilever beam toward the front of the terminal. The contact portion 42 of the spring piece 41 on its free end side generates a contact load with the male terminal 13 . The female terminal 11 receives the male terminal 13 in the insertion space 29 of the electrical contact portion 15 , and elastically contacts the spring piece 41 to perform electrical connection.

The receiving hole 47 is a rectangular opening penetrating through the first side wall 37 at a position corresponding to the locking portion 49 bent and formed at the terminal end of the opening prevention piece 45 .

The locking portion 49 is engaged with the receiving hole 47 by abutting against the hole opening edge 53 (see FIG. 5 ) of the receiving hole 47 formed through the first side wall 37 .

As shown in FIG. 3 , a convex portion 55 is formed on the top wall 43 of the electrical contact portion 15 so as to protrude toward the insertion space 29 . The convex portion 55 is a fulcrum when the spring piece 41 abuts against the male terminal 13 and bends. Furthermore, the anti-opening piece 45 and the receiving hole 47 are arranged so as to coincide with the position of the protrusion 55 in the direction in which the spring piece 41 extends (left-right direction in FIG. 3 ).

In addition, as a modified example of the present embodiment, the lock portion 49 may be bent with respect to the anti-opening piece 45 such that the angle θ (see FIG. 5 ) with the anti-opening piece 45 is an acute angle. In this case, it is more preferable that the hole inner peripheral surface of the receiving hole 47 that locks the lock portion 49 is formed by an upward slope in FIG. 5 along the insertion direction of the lock portion 49 . This inclined surface is inclined parallel to the locking portion 49 . By providing the locking portion 49 and the receiving hole 47 such that the abutting portion is inclined, when a force F in the opening direction acts on the anti-opening piece 45 , the locking portion 49 can be hardly disengaged from the receiving hole 47 . Therefore, the fixing of the top wall 43 is more reliable.

As shown in FIG. 4 , the female terminal 11 according to the present embodiment has an anti-opening piece 45 bent and formed so as to continuously overlap with the top wall 43 on the outer side of the first side wall 37 . Therefore, it has an asymmetrical shape on both sides of an imaginary center line 59 (see FIG. 6 ) passing through the male terminal insertion center. Therefore, the female terminal accommodating chamber 63 of the female housing 61 accommodating the female terminal 11 is also asymmetrical on both sides of the imaginary center line 59 .

Next, the action of the female terminal 11 having the above-mentioned configuration will be described.

According to the female terminal 11 according to the present embodiment, the spring piece 41 elastically contacts the male terminal 13 inserted into the insertion space 29 of the electrical contact portion 15 . The load of the spring piece 41 elastically contacting the male terminal 13 is supported by the top wall 43 overlapping the outside of the spring piece 41 . When the top wall 43 receives a load from the spring piece 41 , the top wall edge 67 (refer to FIG. 5 ) on the bending end side deforms in a direction away from the first side wall 37 (in a direction of floating). That is, the top wall 43 of the box-shaped electrical contact portion 15 is about to be opened.

At this time, since the locking portion 49 of the anti-opening piece 45 overlapping the outer side of the first side wall 37 from the top wall edge portion 67 is inserted into and locked into the receiving hole 47 of the first side wall 37, the top wall 43 is prevented from coming out of the first side wall 37. Deformation in the direction in which the first side wall 37 separates. Accordingly, the female terminal 11 increases the engagement force for maintaining the box shape of the electrical contact portion 15 .

As a result, even if the male terminal 13 is received, the electrical contact portion 15 does not open, and a sufficient contact load by the spring piece 41 is obtained. In addition, in the female terminal 11 , the engaging force for maintaining the box shape of the electrical contact portion 15 can be increased only by general bending.

In addition, as shown in FIG. 6 , the electrical contact portion 15 provided with the box-opening prevention piece 45 has an asymmetrical shape on both sides of the imaginary center line 59 passing through the insertion center of the male terminal. Therefore, the female terminal accommodating chamber 63 of the female housing 61 accommodating the female terminal 11 also has an asymmetrical shape on both sides of the imaginary center line 59 . This also provides an effect of preventing wrong insertion, and prevents insertion of the female terminal 11 into the female housing 61 in an irregular orientation.

Therefore, according to the female terminal 11 according to the present embodiment, stable electrical conduction can be performed without reducing the contact load.

In addition, the female terminal according to the present invention is not limited to the above-mentioned embodiment, and deformation, improvement, etc. can be appropriately performed. In addition, the material, shape, size, number, arrangement location, etc. of each component of the embodiment described above are arbitrary as long as the present invention can be realized, and are not limited thereto.

Here, the features of the embodiment of the above-mentioned female terminal according to the present invention are briefly summarized as [1] to [3] and described in parallel.

[1] A female terminal (11),

The box-shaped electrical contact portion (15) for insertion of the male terminal (13) includes:

bottom wall (31);

a first side wall (37) and a second side wall (39), which stand up from both ends of the bottom wall (31) in the terminal width direction;

a spring piece (41), which is bent continuously with the first side wall (37), and extends in the male terminal insertion direction opposite to the bottom wall (31);

a top wall (43), which is bent continuously with the second side wall (39), and overlaps the outer side of the spring piece (41);

The anti-opening sheet (45), which is bent continuously with the top wall (43), overlaps the outer side of the first side wall (37); and

The locking part (49), which is bent and formed continuously with the anti-opening piece (45), is locked to the receiving hole (47) pierced through the first side wall (37).

[2] The female terminal (11) as described in [1] above,

A protrusion (55) serving as a fulcrum when the spring piece (41) abuts against and bends the male terminal (13) is formed protrudingly from the top wall (43) toward the spring piece (41),

The anti-opening piece (45) and the receiving hole (47) are configured to coincide with the position of the protrusion (55) in the extending direction of the spring piece (41).

[3] The female terminal (11) as described in [1] or [2],

The included angle between the anti-opening piece (45) and the locking portion (49) is an acute angle.

In addition, this application is based on the JP Patent application (Japanese Patent Application No. 2013-124112) for which it applied on June 12, 2013, The content is taken in here as a reference.

Industrial Applicability

According to the female terminal according to the present invention, it is possible to provide a female terminal capable of stable electrical conduction without reducing the contact load.

Claims (2)

1. a kind of female end is sub,

Electrical contacts for the box-shaped of male insertion include：

Bottom wall；

1st side wall and the 2nd side wall, it is erected from the two ends in the termination width direction of the bottom wall；

Spring leaf, it is continuously bent processing with the 1st side wall, is opposed to prolong in male direction of insertion with the bottom wall Stretch；

Roof, it is continuously bent processing, overlaps the outside of the spring leaf with the 2nd side wall；

Anti- unpacking piece, it is continuously bent processing with the roof, overlaps the outside of the 1st side wall；And

Sticking department, it is continuously bent to form with the anti-unpacking piece, engages to the receiving orifice for being arranged in the 1st side wall,

The angle of the anti-unpacking piece and the sticking department is acute angle,

The hole inner peripheral surface by sticking department locking of the receiving orifice is inclined by the direction of insertion along the sticking department is inclined Inclined-plane is formed, and the inclined plane is the inclination parallel with the sticking department.

2. female end as claimed in claim 1 is sub,

It has been protrudedly formed from the roof to the spring leaf when being abutted with the male and bent as the spring leaf Fulcrum convex portion,

The anti-unpacking piece and the receiving orifice are disposed of the position of the convex portion on the bearing of trend with the spring leaf Unanimously.