JP2019057454A - Female terminal - Google Patents

Abstract

To provide a female terminal with which it is possible for a spring contact part to secure a sufficient contact load relative to a tab-like connection part of a male terminal while preventing excessive displacement of the spring contact part by a simple configuration the strength of which is hardly reduced.SOLUTION: The female terminal comprises: a spring contact part 12 connected to a tab-like connection part 51 inserted in a cylindrical part 11 by sandwiching the tab-like connection part 51 between a bulged portion 12b and a counter surface 11c and having a hook-like folded part 12d, with the tip folded back in shape of a hook to a one surface 11b side; and an abutting protrusion 13 protruded to the one surface 11b so as to prevent excessive displacement of the spring contact part 12 due to that when the tab-like connection part 51 is inserted, the hook-like folded part 12d of the spring contact part 12 being rotated, with a bent part 12a serving as fulcrum, is contacted by a tip surface 12dd while in contact with the one surface 11b, and thereby serves as fulcrum on the tip side of the spring contact part 12, and also contacted by the bulged portion 12b that is elastically deformed to the one surface 11b side.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a female terminal having a spring contact portion connected to a tab-like connection portion of a male terminal.

Conventionally, a female terminal formed by punching and bending a plate-like metal member has an opening in which a tab-like connection portion is inserted into a cylindrical portion into which a tab-like connection portion of the male terminal is inserted. A spring contact portion formed by folding back from the side toward the inside of the cylinder is provided.
In such a spring contact part, it is important in connection reliability to ensure a sufficient contact load with the tab-like connection part of the male terminal.

For example, in Patent Document 1, in a state where a tab (tab-shaped connection portion) is inserted into a terminal connection portion (tubular portion), a second fulcrum portion that is restricted from being displaced toward the substrate portion side, and a second fulcrum A terminal fitting having a bending portion that is formed so as to be continuous with the contact portion and the contact portion, and in a state where the tab is inserted into the terminal connection portion, elastically deforms to generate a contact pressure between the contact portion and the tab ( Female terminal).
Moreover, the terminal metal fitting described in Patent Document 1 has the elastic contact piece (spring contact portion) and the first support portion when the rear end portion of the elastic contact piece (spring contact portion) receives a reaction force from the reinforcing portion. The both ends are supported by the reinforcing portion, and a sufficient contact load between the contact portion and the tab can be secured.

JP2011-216435A

However, the terminal metal fitting described in Patent Document 1 has a structure for suppressing excessive displacement of the elastic contact piece (spring contact portion) and supports both ends of the elastic contact piece (spring contact portion) to provide a sufficient contact load. Since the structure for ensuring is provided separately, there has been a problem that the structure becomes complicated.
In addition, the terminal fitting described in Patent Document 1 is formed with a locking hole for locking the second fulcrum portion in the terminal connection portion in order to suppress excessive displacement of the elastic contact piece (spring contact portion). There was a problem that the strength of the terminal connection portion was lowered.

  The present invention has been made in view of the above, and has a simple configuration that does not reduce the strength, while preventing excessive displacement of the spring contact portion, while preventing the tab-like connection portion of the male terminal from being displaced. It is an object of the present invention to provide a female terminal in which a spring contact portion can ensure a sufficient contact load.

  In order to solve the above-described problems and achieve the object, the female terminal according to claim 1 of the present invention has a plate-like wall on one surface side of the cylindrical portion into which the tab-like connecting portion of the male terminal is inserted. Bently formed by forming a bulging portion in a mountain-like manner on the opposite surface side facing the one surface between the folded portion folded back from the opening side where the tab-like connecting portion is inserted toward the inside of the cylinder and the tip portion of the folded portion The tab-shaped connecting portion inserted into the cylindrical portion is sandwiched between the bulging portion and the facing surface to connect to the tab-shaped connecting portion, and the tip end portion is on the one surface side. When the tab-like connecting portion is inserted between the spring contact portion that is a hook-like folded portion that is folded in a shape, and the opposed surface and the bulging portion, the rotation is performed with the bent portion as a fulcrum. The hook-shaped folded portion of the spring contact portion contacts the one surface. When the tip surface is brought into contact in the state, it becomes a fulcrum on the tip side of the spring contact portion, and the bulge portion elastically deformed on the one surface side makes contact with the spring contact portion so that the spring contact portion is excessively displaced. And an abutting protrusion projecting on the one surface so as to prevent this.

In the female terminal according to the present invention, when the tab-like connecting portion is inserted between the facing surface of the cylindrical portion and the bulging portion, the contact protrusion is rotated about the bent portion. When the tip surface of the spring contact portion is in contact with the one surface, the spring contact portion becomes a fulcrum on the tip side of the spring contact portion and is elastically deformed to the one surface side. Excessive displacement of the spring contact portion can be prevented by contacting the bulging portion.
In addition, the female terminal according to the present invention has a simple configuration because the abutment projection functions as both a fulcrum and an excessive displacement prevention, and is associated with an excessive displacement prevention. Since there is no need to reduce the strength by forming a stop hole, the structure is simple and does not reduce the strength. The spring contact portion can secure a sufficient contact load.

1A is a cross-sectional view of a female terminal according to an embodiment of the present invention, and FIG. 1B is an enlarged view around a spring contact portion of the female terminal shown in FIG. FIG. 2 is a perspective view of a connector housing in which female terminals are accommodated. FIG. 3 is a cross-sectional view of a connector in which the female terminals shown in FIG. 1 are accommodated in a connector housing. FIG. 4 is a cross-sectional view of the connector showing a state in which the tab-like connection portion of the male terminal is connected to the spring contact portion of the female terminal. FIG. 5 is a diagram for explaining that an excessive displacement of the spring contact portion is prevented by the elastically deformed bulge portion coming into contact with the contact protrusion. FIG. 6 is a cross-sectional view of the connector in a state in which the female terminal is accommodated in the terminal accommodating chamber of the connector housing, and (a) is a diagram illustrating a state before the male terminal is connected to the female terminal. (b) is the figure which showed the state in which the male terminal was connected to the female terminal.

  Hereinafter, preferred embodiments of the female terminal according to the present invention will be described in detail with reference to the drawings.

1A is a cross-sectional view of a female terminal 1 according to an embodiment of the present invention, and FIG. 1B is an enlarged view around a spring contact portion 12 of the female terminal 1 shown in FIG. FIG. 2 is a perspective view of the connector housing 110 in which the female terminal 1 is accommodated. FIG. 3 is a cross-sectional view of the connector 100 in which the female terminal 1 shown in FIG. FIG. 4 is a cross-sectional view of the connector 100 showing a state in which the tab-like connection portion 51 of the male terminal 50 is connected to the spring contact portion 12 of the female terminal 1. FIG. 5 is a diagram for explaining that the spring contact portion 12 is prevented from being excessively displaced by the elastically deformed bulging portion 12 b being brought into contact with the contact protrusion 13.
As shown in FIG. 1, the female terminal 1 according to the embodiment of the present invention has a spring contact portion in which the tab-like connection portion 51 is connected in the cylindrical portion 11 into which the tab-like connection portion 51 of the male terminal 50 is inserted. 12 is provided.

  The female terminal 1 is attached to a terminal portion of the electric wire 60 and functions as a terminal portion of the connector 100 by being accommodated in the terminal accommodating chamber 111 of the connector housing 110 as shown in FIG.

  The female terminal 1 is formed by punching and bending a plate-like metal member, and is connected to the mating terminal connection portion 10 that is a portion connected to the male terminal 50 and the terminal portion of the electric wire 60. And a connecting portion 30 that connects the mating terminal connecting portion 10 and the wire connecting portion 20 to each other.

  The mating terminal connecting portion 10 includes a cylindrical portion 11 in which an opening 11a into which a tab-like connecting portion 51 of the male terminal 50 is inserted is formed on the front end surface, a spring contact portion 12, and a fulcrum on the distal end side of the spring contact portion 12. And a contact protrusion 13 that prevents excessive displacement of the spring contact portion 12.

  The cylindrical portion 11 has a rectangular tube shape in which four surfaces are formed by bending a plate-shaped metal member.

The spring contact portion 12 is provided by folding back a plate-like wall 11bb on the one surface 11b side of the tubular portion 11 from the opening 11a side where the tab-like connecting portion 51 is inserted toward the inside of the tube.
The spring contact portion 12 is formed by bending a bulging portion 12b between the bent portion 12a and the front end portion of the folded portion on the side of the facing surface 11c facing the one surface 11b. The bulging portion 12b and the facing surface 11c are bent. The tab-shaped connecting portion 51 inserted between the cylindrical portions 11 is sandwiched between the tab-shaped connecting portions 51 so as to be connected.
Further, the spring contact portion 12 is swelled into a hemispherical shape on the facing surface 11c side by punching at a bulging portion 12b between the bent portion 12a and the front end portion of the folded portion, and contacts the tab-like connecting portion 51. The bulging contact part 12c used as the part to be performed is provided.

  Further, the spring contact portion 12 is a hook-shaped folded portion 12d having a tip portion folded in a hook shape on the one surface 11b side.

  When the tab-like connecting portion 51 is inserted between the facing surface 11c and the bulging portion 12b, the contact protrusion 13 has the hook-like folded portion 12d of the spring contact portion 12 rotated around the bent portion 12a as one surface. When the tip surface 12dd is in contact with 11b, it becomes a fulcrum on the tip side of the spring contact portion 12, and the bulging portion 12b elastically deformed on the one surface 11b side makes contact with the spring contact. It is a part protruding from one surface 11b of the cylindrical part 11 so as to prevent excessive displacement of the part 12.

  Since the contact protrusion 13 is provided by punching and forming a plate-like wall forming the one surface 11b, it is difficult to be deformed.

The contact protrusion 13 is a surface inclined from the one surface 11 b toward the apex of the contact protrusion 13, and the side contact with which the tip surface 12 dd of the hook-shaped folded portion 12 d of the spring contact portion 12 is contacted. The surface 13a is formed on the side surface.
In addition, the contact protrusion 13 has an upper contact surface 13b formed on the upper surface, on which the bulging portion 12b of the spring contact portion 12 contacts the apex.

The female terminal 1 having the spring contact portion 12 and the contact protrusion 13 is shown in FIGS. 1 and 3 in a state where the tab-like connection portion 51 is not inserted between the facing surface 11c and the bulging portion 12b. Thus, the spring contact portion 12 is in an elastically neutral state where it is not deformed.
The spring contact portion 12 in an elastically neutral state that is not deformed has a gap between the hook-shaped folded portion 12d and the one surface 11b, and a gap between the tip surface 12dd and the contact protrusion 13. It is arranged at the position.

On the other hand, in the state where the tab-like connecting portion 51 is inserted between the facing surface 11c and the bulging portion 12b, the female terminal 1 has the tab-like connecting portion 51 in the bulging portion of the spring contact portion 12, as shown in FIG. 12b, and the spring contact portion 12 is rotated toward the one surface 11b with the bent portion 12a as a fulcrum, so that the tip surface 12dd is brought into contact with the contact protrusion 13 in a state where the hook-shaped folded portion 12d is in contact with the one surface 11b. Abutted.
When the tip surface 12dd is brought into contact with the contact protrusion 13 in a state where the hook-shaped folded portion 12d is in contact with the one surface 11b in this way, the spring contact portion 12 is moved by the bent portion 12a and the contact protrusion 13. Both ends are supported, and a sufficient contact load can be secured to the tab-like connecting portion 51.

Note that the female terminal 1 is assumed to be inserted, for example, with the tab-shaped connecting portion 51 tilted or a foreign object is inserted, and the tab-shaped connecting portion 51 faces at an abnormal angle as shown in FIG. When an external force that is inserted between the surface 11c and the bulging portion 12b and causes an excessive displacement is applied to the spring contact portion 12, the bulging portion 12b is brought into contact with the abutment protrusion 13 so that the spring contact portion 12 Such excessive stress can be released.
More specifically, in the female terminal 1, the bulging portion 12b of the spring contact portion 12 is brought into contact with the contact protrusion 13, and the bulging portion 12b is directed so that the hook-shaped folded portion 12d at the tip portion faces the facing surface 11c. The warp-shaped folded portion 12d is not brought into contact with the contact protrusion 13 and the one surface 11b, and the spring contact portion 12 is elastically bent into the gap between the one surface 11b, thereby causing excessive stress. It can be escaped.

  The wire connecting portion 20 includes a conductor crimped portion 21 that is crimped to the conductor portion 61 exposed by removing the insulating coating 62 at the tip of the electric wire 60, and a portion where the conductor portion 61 is surrounded by the insulating coating 62. And a covering caulking portion 22 to be tightened.

  The connecting portion 30 includes a bottom wall 31 and a pair of side walls 32 and 32 erected on both edges of the bottom wall 31, and a portion facing the bottom wall 31 is provided in the terminal accommodating chamber 111. The locking hole 33 is locked by the locking piece 111a.

Next, the manner in which the male terminal 50 is connected to the female terminal 1 accommodated in the terminal accommodating chamber 111 will be described using FIG. 6, including the action of the hook-shaped folded portion 12 d and the contact protrusion 13.
FIG. 6 is a cross-sectional view of the connector 100 in a state where the female terminal 1 is accommodated in the terminal accommodating chamber 111 of the connector housing 110, and (a) shows a state before the male terminal 50 is connected to the female terminal 1. (B) is the figure which showed the state in which the male terminal 50 was connected to the female terminal 1. FIG.

The female terminal 1 accommodated in the terminal accommodating chamber 111 is in a state in which the spring contact portion 12 is not elastically deformed before being connected to the male terminal 50 (see FIG. 6A).
The spring contact portion 12 that is not elastically deformed is disposed at a position where the flange-like folded portion 12d has a gap with the one surface 11b and the tip surface 12dd has a gap with the contact protrusion 13. Yes.

The tab-like connecting portion 51 of the male terminal 50 is inserted into the terminal accommodating chamber 111, and the tab-like connecting portion 51 is inserted between the facing surface 11 c of the tubular portion 11 and the bulging portion 12 b of the spring contact portion 12. Thus, the connection of the male terminal 50 to the female terminal 1 is completed (see FIG. 6B).
When the tab-like connecting portion 51 is inserted between the facing surface 11c of the cylindrical portion 11 and the bulging portion 12b of the spring contact portion 12, the terminal accommodating chamber 111 is slidably contacted with the bulging portion 12b. Is moved inward and is brought into contact with the bulging contact portion 12c.
The tab-shaped connecting portion 51 thus moved inward of the terminal accommodating chamber 111 presses the bulging portion 12b of the spring contact portion 12 toward the one surface 11b side of the tubular portion 11, whereby the spring contact portion 12 is bent. The tip end surface 12dd is brought into contact with the contact protrusion 13 in a state where the portion 12a is turned to the one surface 11b side with the portion 12a as a fulcrum and the hook-shaped folded portion 12d is in contact with the one surface 11b.
When the tip surface 12dd is brought into contact with the contact protrusion 13 in a state where the hook-shaped folded portion 12d is in contact with the one surface 11b, the spring contact portion 12 is supported at both ends by the bent portion 12a and the contact protrusion 13 Since it will be in a state, a sufficient contact load is secured to the tab-like connecting portion 51.

  If an external force that causes excessive displacement is applied to the spring contact portion 12 before the tab-like connection portion 51 of the male terminal 50 is completely inserted into the terminal accommodating chamber 111, as described above, the bulging portion 12b. Is brought into contact with the contact protrusion 13 so that excessive stress applied to the spring contact portion 12 can be released.

In the female terminal 1 according to the embodiment of the present invention, when the tab-like connecting portion 51 is inserted between the facing surface 11c of the cylindrical portion 11 and the bulging portion 12b, the contact protrusion 13 has the bent portion 12a as a fulcrum. When the tip end surface 12dd comes into contact with the hook-shaped folded portion 12d of the spring contact portion 12 rotated as a contact with the one surface 11b, it becomes a fulcrum on the tip side of the spring contact portion 12, and the one surface 11b side An excessive displacement of the spring contact portion 12 can be prevented by contacting the bulged portion 12b that is elastically deformed.
In addition, the female terminal 1 according to the present invention has a simple configuration because the abutment protrusion 13 functions as both a fulcrum and an excessive displacement prevention. Since it is not necessary to reduce the strength by forming a stop hole, the tab-like connecting portion of the male terminal 50 is prevented with an excessively small displacement of the spring contact portion 12 with a simple and non-decreasing configuration. The spring contact portion 12 can secure a sufficient contact load with respect to 51.

  The invention made by the present inventor has been specifically described based on the above-described embodiments of the invention. However, the present invention is not limited to the above-described embodiments of the invention and does not depart from the gist thereof. Various changes can be made.

DESCRIPTION OF SYMBOLS 1 Female terminal 10 Opposite terminal connection part 11 Cylindrical part 11a Opening 11b One surface 11bb Wall 11c Opposing surface 12 Spring contact part 12a Bending part 12b Swelling part 12c Swelling contact part 12d Sag-like folding part (tip part)
12dd Front end surface 13 Contact projection 13a Side contact surface 13b Upper contact surface 20 Wire connection portion 21 Conductor crimping portion 22 Cover crimping portion 30 Connecting portion 31 Bottom wall 32 Side wall 33 Locking hole 50 Male terminal 51 Tab shape Connection part 60 Electric wire 61 Conductor part 62 Insulation coating 100 Connector 110 Connector housing 111 Terminal accommodating chamber 111a Elastic locking piece

Claims (1)

A bent portion in which a plate-like wall on one surface side of the tubular portion into which the tab-like connecting portion of the male terminal is inserted is folded back from the opening side into which the tab-like connecting portion is inserted toward the inside of the tube, and the tip of the folded portion The tab-shaped connecting portion inserted into the cylindrical portion between the bulging portion and the facing surface is formed by bending a bulging portion in a mountain-like manner on the facing surface side facing the one surface. A spring contact portion that is connected to the tab-like connecting portion by sandwiching, and the tip portion is a hook-like folded portion that is folded into a hook shape on the one surface side;
When the tab-like connecting portion is inserted between the facing surface and the bulging portion, the hook-like folded portion of the spring contact portion that is rotated with the bent portion as a fulcrum is in contact with the one surface When the tip surface is brought into contact, it becomes a fulcrum on the tip side of the spring contact portion, and the bulging portion elastically deformed on the one surface side makes contact with the excessive displacement of the spring contact portion. A contact protrusion protruding on the one surface to prevent;
A female terminal characterized by comprising:

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