JP2002280106A - Terminal fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal fitting capable of securely preventing coming off later by increasing the strength of a terminal lance. SOLUTION: This terminal fitting 1 is constituted such that the terminal lance 7 is provided with a folded back part 35 bent in the direction of width of a connection part 3 and is formed by bending by a predetermined angle in the direction of outside over the whole width. The folded back part 35 is bent into a U-shape and is formed by a vertical wall 51 formed by cutting out the rear of a side wall provided continuously with the rear of an outer plate 31 and a locking part 53 formed by folding its end part back into an inner side of an inner plate 19 further.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal fitting inserted into a terminal receiving chamber in a connector housing, and more particularly to a structure of a terminal lance of a terminal fitting formed in a terminal receiving chamber to prevent back-out. It is.

[0002]

2. Description of the Related Art As a conventional terminal fitting, there is, for example, one described in Japanese Patent Application Laid-Open No. Hei 10-134875. That is, the terminal fitting 101 as shown in FIG.
Is a female terminal fitting, and is composed of a square tubular connecting portion 103 into which the mating male terminal fitting is inserted, and an electric wire holding portion 105 that holds the covered electric wire in a pressed state and conducts electricity. It is configured.

[0003] The connecting portion 103 is formed by bending an elastic contact piece 107 that can contact a mating male terminal fitting inward from a front edge. Ceiling wall 1 of the connection section 103
09 is provided with a stabilizer 111 projecting upward to guide the terminal fitting 101 to a proper position in a terminal receiving chamber of a connector housing (not shown).
A terminal lance 113 for locking the terminal fitting 101 in the terminal accommodating chamber so as to prevent back-out is cut and raised upward at a predetermined angle. The terminal lance 113 is elastically deformed downward when inserted into the terminal accommodating chamber, returns upward while being inserted at a predetermined position, and is engaged with the engaging portion in the terminal accommodating chamber.

As shown in FIG. 8, a connecting portion 103 of a thin metal plate 115 forming a terminal fitting 101 is bent into five regions in the width direction, and a middle region thereof is connected. 103 becomes the bottom wall 117. On both sides of the bottom wall 117, both side walls 119 and 119 are provided.
9, 121. The terminal lance 113 described above is attached to the ceiling wall 109 at the edge 123.
It is cut out so as to leave (the connection part of the meat). The stabilizer 111 is provided on the opposite side of the terminal lance 113 with the edge 123 therebetween.

[0005]

However, in the conventional terminal fitting 101 as described above, the terminal lance 113 for preventing the terminal fitting from coming off from the connector housing is formed by a thin plate forming the ceiling wall 109 of the terminal fitting 101. Since the metal is cut and raised while leaving the edge 123 of the metal, there is a problem that a large lateral width cannot be obtained and a sufficient holding force cannot be secured.

[0006] The terminal lance 113 is provided on the upper ceiling wall 1 which is formed by doubly overlapping the terminal fitting 101.
Since the terminal metal 101 is made of the thin metal 115 constituting the connector 09, the terminal metal 101 is easily turned when an outward external force is applied, and there is a problem that the terminal fitting 101 cannot be reliably prevented from falling out of the connector housing. . SUMMARY OF THE INVENTION An object of the present invention has been made in view of the problems of the above-mentioned conventional terminal fittings, and it is an object of the present invention to provide a terminal fitting which can reliably prevent back-out by increasing the strength of a terminal lance. .

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to provide a terminal fitting according to the present invention, which has a connection portion formed at one end by bending a conductive thin metal plate at one end and a connector. A terminal fitting having a terminal lance for preventing back-out from a terminal accommodating chamber in a housing,
The terminal lance includes a folded portion bent in a width direction of the connection portion, and is formed to be bent outward at a predetermined angle over the entire width. Therefore, by providing the folded portion in the width direction of the connecting portion, the strength of the terminal lance is remarkably improved, and the terminal lance can be formed over the entire width of the connecting portion. Can be. Therefore, it is possible to reliably prevent the terminal fitting from slipping off.

According to a second aspect of the present invention, in the terminal fitting of the first aspect, the folded portion forms a first side wall by overlapping one side surface of the connection portion. It is characterized in that it is formed by notching the rear of the second side wall provided continuously to the rear of the outer side plate forming the first side wall and bending the inner side plate inward so as to be folded inward. Therefore, the outer plate of the terminal lance is arranged above the inner plate, and the folded portion of the terminal lance is arranged below the inner plate,
The inner plate functions as a stopper member against the longitudinal displacement of the U-shaped terminal lance. And the second
Since the folded portion is formed by cutting out the side wall, the first
A terminal lance can be formed over the entire width of the side wall. Therefore, the longitudinal displacement of the terminal lance can be reliably suppressed, and a more stable locking state can be ensured.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the terminal fitting of the present invention will be described below in detail with reference to FIGS. 1 is a perspective view showing the terminal fitting of the present embodiment, FIG. 2 is a development view in FIG. 1, FIG. 3 is a sectional view taken along line AA in FIG. 1, and FIG. 4 is a sectional view taken along line BB in FIG. 5 is a perspective view showing an operation when the terminal fitting of the present embodiment is inserted into the connector housing, and FIG. 6 is a cross-sectional view showing an insertion completed state in FIG. The terminal fitting 1 of the present embodiment is of a female type, and is electrically connected to a rectangular tubular connecting portion 3 into which a male terminal fitting (not shown) on the other side is inserted, while holding the coated electric wire in a pressed state. And an electric wire holding part 5 connected to the electric wire.

As shown in FIG. 2, the terminal fitting 1 is primarily processed by punching a thin metal plate into a predetermined shape, and is subjected to secondary processing by bending a predetermined portion. A portion corresponding to the connection portion 3 is divided by bending lines 9A, 9B, 9C, and 9D, and a second portion is provided on both outer sides of the central bottom wall 11 (vertical direction in the drawing).
Side walls 13 and 15 as side walls, and an inner plate 1 that forms a ceiling wall 17 as a first side wall outside the side walls 13 and 15
9 and an outer plate 31 are provided. The bending lines 9B and 9C between the bottom wall 11 and the side walls 13 and 15 are provided with notches 21 and 23 at the right end, respectively, and the bottom wall 11 is provided at the right end of the bottom wall 11 in the drawing. An elastic contact piece 25 having a width smaller than that of the elastic contact piece 25 is provided so as to protrude. A part of the bottom wall 11 is cut out over the entire width to provide an opening 27.

A terminal lance 7 is provided on the outside wall 31 of the ceiling wall 17 which is superimposed on the upper side at the time of assembly, which will be described later, on the left side of the bending line 29 in the drawing. The terminal lance 7 has a folded portion 35 protruding toward the side wall 13 adjacent to the outer plate 31 by an L-shaped notch 33. That is, the notch 33 is cut in the side wall 13 so as to extend the bending line 29, and is bent leftward in FIG. 2 to reach the left end of the side wall 13 before reaching the bending line 9B. In addition, the folded portion 35
Are provided with bending lines 37 and 39, each of which is bent inward. The interval between the bending line 37 and the bending line 39 is set to be larger than at least the thickness of the lower ceiling wall 19 (the thickness of a thin metal plate).

The electric wire holding portion 5 is provided with a pair of electric wire covering and tightening portions 41 on the left side in FIG. A line caulking part 43 is provided.

Next, a procedure for forming the terminal fitting 1 of this embodiment will be described. First, as shown in FIG. 2, the upper outer plate 31 is bent up along the bending line 29, and is bent so that the tip of the elastic contact piece 25 is involved, and further folded back from the bending line 45 (FIG. 3). reference). As described above, the width of the elastic contact piece 25 is smaller than the width of the bottom wall 11. Further, a projection 49 is provided on the elastic contact piece 25 so as to reliably contact the male terminal fitting to be inserted (see FIG. 4).

Next, after bending lines 9B and 9C are bent up at a right angle to form bottom wall 11, bending line 9D is bent at a right angle to form inner plate 19 parallel to bottom wall 11. Next, the bending line 9 </ b> A is bent at a right angle, and the outer plate 31 is overlapped on the inner plate 19 to form the rectangular tube-shaped connection portion 3. Next, the folded portion 35 is bent inward at a right angle along the bending line 37 to form the vertical wall 51, and the bending line 39 is bent inward at a right angle to form the locking portion 53.

The wire holding portion 5 is bent up along the extension of the bending lines 9B and 9C on the side walls 13 and 15 of the connecting portion 3 before connecting the wires, and a pair of core wire crimping portions is used at the time of connecting the wires. The wire 43 and the wire cover caulking portion 41 are caulked so as to embrace the wire from outside the wire.

Next, the operation of inserting the terminal fitting of this embodiment into the connector housing will be described. When the terminal fitting 1 having the above-described configuration is inserted into the terminal accommodating chamber 57 of the connector housing 55 with the elastic contact piece 25 facing forward as shown in FIG. It is pressed down by contact (in the direction C in FIG. 3). When the terminal fitting 1 is inserted to a predetermined position, the terminal lance 7 reaches the locking recess 59 inside the terminal accommodating chamber 57 and jumps upward due to elastic force (direction D in FIG. 3). As a result, the rear end of the terminal lance 7 is locked by the locking step 63 provided on the ceiling wall 61 of the terminal accommodating chamber 57 as shown in FIG. Dropout can be reliably prevented.

As described above, the terminal fitting 1 of the present embodiment
Since the terminal lance 7 is provided over the entire width of the ceiling wall 17, the strength of the terminal lance 7 is increased, and the vertical wall 51 forming the folded portion 35 of the terminal lance 7 functions as a reinforcing member. The rigidity of the terminal lance 7 is increased, and the terminal holding force is improved.

The terminal lance 7 has an inner plate 19.
Is provided integrally, so that when an external force acts in the direction of raising the terminal lance 7 (direction D in FIG. 3), the locking portion 53 contacts the lower surface of the inner plate 19. Touch Therefore, the terminal lance 7 can be prevented from being excessively displaced upward, and can be prevented from being turned up.
It is possible to reliably prevent the terminal fitting 1 from coming off from inside the connector housing 55. Even if an external force acts in the direction in which the terminal lance 7 is released (the direction C in FIG. 3), the terminal lance 7 contacts the upper surface of the inner plate 19, so that excessive deformation is prevented as described above.

In the terminal fitting according to the above-described embodiment of the present invention, a case will be described in which the ceiling wall 17 of the connection portion 3 has a double structure of the inner plate 19 and the outer plate 31, and the terminal lance 7 is provided on the outer plate 31. However, it is also possible to provide them on the bottom wall 11 or the side walls 13 and 15 side.

[0020]

As described above, in the terminal fitting according to the first aspect of the present invention, the terminal lance is provided with a folded portion bent in the width direction of the connecting portion, and is formed to be bent outward at a predetermined angle over the entire width. ing. Therefore, the strength of the terminal lance is remarkably improved, and the terminal lance can be formed over the entire width of the connection portion, so that the terminal lance can be stably locked in the terminal receiving chamber. Therefore, it is possible to reliably prevent the terminal fitting from slipping off.

Further, in the terminal fitting according to claim 2 of the present invention, the folded portion forms a first side wall by overlapping one side surface of the connecting portion doubly, and forms the first side wall. It is formed by notching the rear of the second side wall provided continuously to the rear of the outer plate and bending the inner plate in a U-shape so that the inner plate is folded inward. Therefore, the outer plate of the terminal lance is arranged above the inner plate, and the folded portion of the terminal lance is arranged below the inner plate, so that the U-shaped terminal lance can be displaced in the vertical direction. On the other hand, the inner plate functions as a stopper member. Therefore, the displacement of the terminal lance in the vertical direction can be reliably suppressed, and outward turning and the like can be reliably prevented, and a more stable locking state can be secured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a terminal fitting of the present invention.

FIG. 2 is a development view in FIG.

FIG. 3 is a sectional view taken along line AA in FIG.

FIG. 4 is a sectional view taken along line BB in FIG. 3;

FIG. 5 is a perspective view showing an operation when the terminal fitting of the present invention is inserted into a connector housing.

FIG. 6 is a cross-sectional view showing an insertion completed state in FIG. 5;

FIG. 7 is a perspective view showing a conventional terminal fitting.

FIG. 8 is a development view in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal fitting 3 Connection part 7 Terminal lance 17 Ceiling wall (1st side wall) 19 Inner board 31 Outer board 35 Folding part 51 Vertical wall 53 Locking part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tominaga Torii 206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Prefecture Inside Yazaki Parts Co., Ltd. (72) Inventor Yasuhiro Sasaki 206-1 Nunobikihara, Haibara-cho, Harihara-gun, Shizuoka Prefecture Yazaki Parts (72) Inventor Jun Uchida 206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Prefecture Inside Yazaki Parts Co., Ltd. (72) Inventor Chitoshi Nakamura 206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Prefecture Yazaki Parts Corporation ( 72) Inventor Takakazu Takahashi 206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Yazaki Parts Co., Ltd. (72) Inventor Akiko Oike 206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Yazaki Parts Co., Ltd. F-term (reference) 5E087 FF08 GG17 MM18 RR06 RR26 RR36

Claims (2)

[Claims] 1. A terminal fitting having a connection portion formed by bending a conductive thin metal plate into a rectangular tube shape at one end and having a terminal lance for preventing back-out from a terminal accommodating chamber in a connector housing. The terminal fitting is characterized in that the terminal lance is provided with a folded portion bent in the width direction of the connecting portion, and is bent at a predetermined angle outward in the entire width. 2. The folded portion includes a first side wall formed by doubly overlapping one side surface of the connecting portion, and a second side wall connected to a rear side of an outer plate forming the first side wall. The terminal fitting according to claim 1, wherein the terminal fitting is formed by bending the inside plate into a U-shape so as to cut back the inside plate and turn the inside plate inward.