JPH0831488A - Terminal - Google Patents

Abstract

PURPOSE:To provide such a female terminal for large current that facilitates insertion and exchange of a contact spring member and eliminate any damage of parts. CONSTITUTION:A terminal is provided with a hollow cylindrical connection part 4 having a fitting chamber 4A constituted from such an inner wall that a male terminal can be fitted in, at its one end and a hollow cylindrical wire crimp part 5 having such an inside diameter that a wire can be fitted in, at the other end, and a contact spring member 6 provided with a plurality of spring pieces 6B with elasticity, which are projected from a hollow cylindrical circular ring part 6A to the inside, is fitted in the inside wall of the fitting chamber 4A. This female terminal 1 comprises a screw string 4C formed in the hollow cylindrical outer wall for constituting the connection part 4, a bottomed cylindrical terminal inlet 2A in which a male terminal tab can be fitted at its central part of the bottom, and a cap 2 provided with a screw groove for engaging with the screw string 4C from the cylindrical inner wall tip to the bottom direction and detachably provided at the tip of the connection part 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal, especially a large current female terminal applied to a connector for an electric vehicle wire harness.

[0002]

2. Description of the Related Art Since a connector applied as a wire harness for an electric vehicle needs to be able to withstand a large current, for example, a female terminal must have a structure adapted to a large current capacity. Therefore, in order to realize a large current capacity and a low contact resistance, conventionally, the terminal of the connector is usually machined from a round bar-shaped solid conductive material in a cutting process. The structure and processing method of such a conventional female terminal for a connector (hereinafter, simply referred to as a female terminal) will be described below with reference to FIG. 6 attached.

FIG. 6 is a sectional view of a conventional female terminal manufactured by cutting. In the figure, the female terminal 20 is
A hollow cylindrical shape in which the outer circumference and the inside of a solid round bar are cut out with a cutting tool such as a bite, and has a connecting portion 21 into which a male terminal is inserted and which is crimped at the rear end. It is provided with a crimp portion 22. The connecting portion 21 is provided with a cylindrical fitting chamber 21A having a diameter of d1, a locking projection 21D having a diameter of d2 smaller than the d1 provided at the entrance of the fitting chamber 21A, and further provided at the inner part. The diameter is d2
21C of the locking wall. The leading end of the locking ridge 21D forms an introduction port 21B that opens to the outside, and the locking ridge 21D
The rear end forms a locking wall 21E that is enlarged in diameter in the axial direction. On the other hand, the locking wall 21C is reduced in diameter perpendicular to the axial direction. As a result, the diameter d between the locking walls 21E and 21C is d.
One cylindrical space is formed, and a conductive, hollow cylindrical contact spring member 6 (see FIG. 4) is fitted into this space.

Annular portions 6A at the front and rear ends of the contact spring member 6,
The end of 6A is brought into contact with and locked by both locking walls 21E and 21C. With the contact spring member 6 assembled in this way, a male terminal (not shown) having a diameter d2 from the inlet 21B.
When the male terminal is inserted, the male terminal comes into strong contact with the spring piece 6B which is slid inward, and pushes the spring piece 6B outward, and further advances beyond the position of the locking wall 21C, and the insertion chamber 2
1A is filled in and fitted and connected.

[0005]

However, in the structure of the conventional female terminal as described above, since the introduction frontage is d2 and is smaller than the diameter d1 of the annular portion 6A of the contact spring member 6, the contact is made at the time of insertion. It is necessary to push in the spring member 6 while forcibly deforming it. Therefore, there is a problem that the work is difficult and the workability is not good, and further, an accident such as plastic deformation or breakage of the contact spring member occurs. Further, there may be a defect that the contact spring member is not securely inserted between the both locking walls. Furthermore, when replacing the contact spring member for maintenance, etc., troublesome work is required,
There was also a problem that the service cost would be high. The present invention has been made to solve the problems and problems of the prior art, and an object thereof is to provide a female terminal in which the contact spring member can be easily inserted and replaced and which does not damage the parts. To do.

[0006]

In order to solve the above-mentioned problems, a female terminal according to the present invention has an electric wire at one end of which is a connection portion of a hollow cylinder having a fitting chamber formed of an inner wall into which a male terminal can be fitted. A plurality of spring pieces elastically protruding inwardly from the hollow cylindrical annular portion on the inner wall of the fitting chamber, the hollow cylindrical wire crimping portion having an inner diameter into which the In a female terminal formed by fitting a contact spring member provided with, a thread is provided on the outer wall of the hollow cylinder that constitutes the connection portion, and a cylindrical inner wall has a bottom for locking the spring member, and There is a terminal introduction port into which the male terminal can be inserted in the central part, and a cap provided with a screw groove to be screwed into the screw thread is detachably arranged from the tip of the inner wall of the cylinder to the tip of the connection part. It is characterized by being installed. Alternatively, in the above, the fitting chamber is provided with a locking wall for locking one end of the contact spring member.

[0007]

In the female terminal for high current according to the present invention, the thread is provided in the thread provided on the outer wall of the hollow cylinder of the connecting portion having the fitting chamber formed by the inner wall into which the male terminal can be fitted. By screwing the cap, the cap can be easily attached to and detached from the tip of the connecting portion. Therefore, by removing the cap, the contact spring member having the hollow cylindrical annular portion and the plurality of spring pieces protruding inward can be easily fitted into the fitting chamber or can be taken out and replaced. . Further, when the cap is mounted, the inner surface of the cap bottom close to the outer edge abuts on the annular portion of the fitted contact spring member, so that the fitted contact spring member may fall off or a part may pop out from the fitting chamber. No trouble will occur.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a female terminal for a large current according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of an embodiment of a female terminal according to the present invention. 2 is a sectional view of the female terminal 1 of FIG. 1 taken along the line WW. In both figures, a female terminal 1 for large current according to the present invention comprises a hollow cylindrical terminal body 3 made of a conductive material, a cap 2 attached to the tip of the terminal body 3, and a terminal body 3 inside the terminal body 3. The contact spring member 6 is made of a conductive material and is fitted. The terminal body 3 has a hollow cylindrical connecting portion 4 at its tip and a hollow cylindrical electric wire crimping portion 5 having an inner diameter into which an electric wire can be inserted and inserted at the other end. The hollow cylindrical connecting portion 4 has a cylindrical fitting chamber 4A formed of an inner wall into which a male terminal can be fitted. Further, a screw thread 4C is provided on the outer wall of the hollow cylinder of the connecting portion 4.

As shown in FIG. 2, the cylindrical fitting chamber 4A has a diameter d1. In contact with the inner wall of this insertion chamber 4A,
Two hollow cylindrical annular portions 6A, 6A as shown in FIG.
A contact spring member 6 including a plurality of elastically projecting spring pieces 6B, which are integrally provided with the annular portions 6A, 6A, is fitted into the annular spring portions 6A. The contact spring member 6 is mounted to make the electrical contact between the female terminal and the male terminal good and to realize a low contact resistance. The contact spring member 6 is made of a highly conductive material such as brass or beryllium-copper that is rich in elasticity. Manufactured.
The outer diameter of the annular portion 6A is substantially d1, the inner diameter thereof is substantially d2, and the inner diameter of the portion of the spring piece 6B is not more than d2.

FIG. 3 is a perspective view of the cap shown in FIG. The cap 2 has a cylindrical shape and a bottom slightly protruding inward in the radial direction is provided on one end side thereof to enable engagement of the contact spring member 6 and the male terminal at the center of the bottom. Has a terminal introduction port 2A into which is inserted, and the diameter of the annular wall-shaped guide surface 2B forming the terminal introduction port 2A is approximately d2. Chamfering section 2D continuously provided on the guide surface 2B
Facilitates insertion of male terminals. Also, on the outer edge of the bottom,
Jig grooves 2E and 2E for screwing the cap 2 are provided. The cap 2 can be made of an insulating or conductive material. By forming the cap 2 from an insulating material, unexpected accidents such as contact can be avoided, but by forming it from a conductive material such as metal. At the same time as improving the electrical contactability, the mechanical strength can be improved. A thread groove 2C that is screwed into the thread 4C provided in the connection portion 4 is provided in the locking step portion 2G direction from the inner wall tip of the cylindrical portion 2F. That is, the cap 2 can be attached to and detached from the tip of the connecting portion 4 by screwing the thread groove 2C into the thread 4C.

Here, as shown in FIG. 2, the contact spring member 6 is fitted in the fitting chamber 4A, and the cap 2 is attached to the contact spring member 6 to engage the bottom of the cap 2 for connection. It is held in the part 4 and the inlet 2A of the cap 2
When a male terminal (not shown) having a diameter of d2 is inserted from the above, the male terminal is guided by the guide surface 2B of the cap 2 and enters the fitting chamber 4A of the connecting portion 4, and is fitted to the inner wall of the fitting chamber 4A. The contact spring member 6 is in strong contact with the inwardly bent spring piece 6B and further spreads the spring piece 6B outwardly to reach the deep portion of the fitting insertion chamber 4A for fitting connection. Since the diameter of the inlet 2A of the cap 2 is d2 and the diameter of the contact spring member 6 is d1 larger than this, the cap 2 can effectively confine the contact spring member 6 in the fitting chamber 4A. Is.

FIG. 5 is a perspective view of the terminal body 3 which constitutes the female terminal 1 of FIG. As shown in the figure, the terminal body 3 may be configured to include a locking wall 4B that is perpendicular to the axial direction along the inner wall of the fitting chamber 4A. This locking wall 4
B restricts the axial deformation of the contact spring member 6 when the contact spring member 6 and the male terminal are coupled together, and the spring piece 6B.
The protruding state toward the inside of the insertion chamber 4A is strongly maintained.
As a result, the protruding spring piece 6B is in a state of being strongly pushed back to the outside by the male terminal when it is coupled with the male terminal, and as a result, the contact spring member 6 makes strong contact with both male and female terminals in a wide range, resulting in a large current density. A low contact resistance will be realized.

As is clear from the above embodiment, in the female terminal 1 according to the present invention, when the cap 2 is removed, the fitting chamber 4A is inserted.
The opening is exposed. As a result, the hollow cylindrical contact spring member 6 can be extremely easily fitted into the fitting chamber 4A or can be taken out and replaced. Moreover, it is possible to avoid an undesired situation in which the contact spring member 6 is excessively deformed or damaged, or the attachment work is advanced at an unsuitable position or shape. Further, when the cap 2 is mounted, the inner surface near the outer edge of the bottom of the cap 2 comes into contact with the end of the annular portion 6A of the fitted contact spring member 6, so that the fitted contact spring member 6 is fitted and inserted. There are no problems such as falling off from the chamber 4A and protruding from the fitting chamber 4A.

[0014]

As is apparent from the embodiments described above, the female terminal for large current according to the present invention is constructed by including a detachable cap attached to the end portion of the connecting portion, and It becomes extremely easy to easily assemble or take out and replace the contact spring member having the spring piece that has elasticity and protrudes inward from the ring-shaped annular portion on the inner wall of the fitting chamber. Further, when the cap is attached, the contact spring member is confined, so that the fall prevention effect can be realized. Further, the cylindrical contact spring member is internally fitted to the locking wall provided in the radial direction along the inner wall of the connecting portion, so that the contact spring member can be positioned more easily. .

As described above, according to the present invention, the assembling work and the replacing work of the contact spring member to the terminal body are facilitated,
Moreover, it is possible to reduce the defective rate and the variation of the product without damaging the parts. That is, it is possible to avoid the occurrence of defects and the reduction in yield due to the dependence on the skill of the worker as in the conventional case, and also it is possible to realize the cost reduction due to the reduction in the number of work steps.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a female terminal according to the present invention.

FIG. 2 is a sectional view taken along line WW of FIG.

3 is a perspective view of the cap in FIG. 1. FIG.

FIG. 4 is a perspective view of the contact spring member of FIG.

5 is a perspective view of the terminal body of FIG. 1. FIG.

FIG. 6 is a sectional view of a conventional female terminal.

[Explanation of symbols]

 1 Female Terminal 2 Cap 2A Terminal Inlet 2B Guide Surface 3 Terminal Body 4 Connection Part 5 Wire Crimping Part 6 Contact Spring Member

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[Procedure amendment]

[Submission date] October 17, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

FIG. 6 is a sectional view of a conventional female terminal manufactured by cutting. In the figure, the female terminal 20 is
In the middle hollow cylindrical shape which Ri out cutting by the outer peripheral and cutting tools such as bytes internal real round bar, at its front end has a connecting portion 21 which inserted a male terminal, also crimped wires at the rear end The electric wire crimping portion 22 is provided. The connecting portion 21 is provided with a cylindrical fitting chamber 21A having a diameter of d1, a locking projection 21D having a diameter of d2 smaller than the d1 provided at the entrance of the fitting chamber 21A, and further provided at the inner part. The diameter is d2
21C of the locking wall. The leading end of the locking ridge 21D forms an introduction port 21B that opens to the outside, and the locking ridge 21D
The rear end forms a locking wall 21E that is enlarged in diameter in the axial direction. On the other hand, the locking wall 21C is reduced in diameter perpendicular to the axial direction. As a result, the diameter d between the locking walls 21E and 21C is d.
One cylindrical space is formed, and a conductive, hollow cylindrical contact spring member 6 (see FIG. 4) is fitted into this space.

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

Claims (2)

[Claims] 1. An electric wire crimping portion having a hollow cylindrical shape having an inner diameter into which an electric wire can be inserted, and the other end is a connecting portion of a hollow cylinder having an inserting chamber formed with an inner wall into which a male terminal can be inserted and inserted. In preparation for
In the female terminal formed by fitting a contact spring member having a plurality of spring pieces elastically protruding inward from a hollow cylindrical annular portion, the connecting portion is configured The outer wall of the hollow cylinder is provided with a thread, and the inner wall of the cylinder has a bottom for locking the spring member, and the center portion of the bottom has a terminal introduction port into which the male terminal can be inserted. A female terminal characterized in that a cap provided with a thread groove to be screwed into the thread is detachably arranged at the tip of the connecting portion from the tip to the bottom. 2. The female terminal according to claim 1, wherein the fitting chamber has a locking wall for locking one end of the contact spring member.