JPH07201391A - Round pin terminal - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a round pin terminal which has a simple structure with a small number of parts, and which can easily and securely engage and lock a sleeve pipe in an assembling process. [Structure] The round pin terminal A is composed of a terminal body 1 having a wire connecting portion 6 and a sleeve tube 2. Terminal body 1
Is an end portion 6A of an electric wire connecting portion having a diameter larger than the inner diameter of the sleeve tube 2 and a spring portion 4 having a diameter smaller than the inner diameter of the sleeve tube 2 and having a slit 4B formed integrally via an inclined portion 5. Is formed. The sleeve pipe 2 is fitted into the spring portion 4, and the diameter of the portion of the tip 4A of the spring portion 4 protruding from the sleeve pipe 2 is increased. The sleeve tube 2 is sandwiched between the inclined portion 5 and the expanded tip 4A of the spring portion 4,
It is attached to the terminal body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a round pin terminal used for connecting various electric devices.

[0002]

2. Description of the Related Art Conventionally, multi-contact terminals have been widely used in various fields such as wire harnesses for automobiles. A sleeve-integrated round pin is used as a terminal constituting a contact portion of such multi-contact terminals. The terminal is known. As this type of round pin terminal, for example, a round pin terminal having a structure as shown in FIG. 5 is known. The terminal includes a socket body 31 having a small diameter portion 32 at its tip, and the socket body 31.
Between the opening 34 of the metal sleeve 33 fitted in
It is configured by interposing a cylindrical spring 35. The tip corner portion 35A formed by bending the end portion of the tubular spring 35 outward secures the insertion / removal of the pin contact with the mating contact (not shown) and maintains a constant insertion / removal force. .

A round pin terminal having a structure as shown in FIG. 6 is also known. Terminals are mating contacts (not shown)
A substantially cylindrical contact portion 41 that fits in contact with the cable connection portion 42 that connects a cable (not shown), and a sleeve portion 4
3 and 3 are integrally punched, the contact portion 41 is cylindrical, the cable connecting portion 42 is U-shaped, and the sleeve portion 4 is
3 is formed by bending the contact portion 41 to a curvature opposite to that of the cylinder of the contact portion 41 to some extent. Then, the sleeve portion 43 is moved to the arrow 45.
In the direction shown by, bend the connection part 46 as a fulcrum
The sleeve portion 43 is positioned so as to cover the contact portion 41, and thereafter, the sleeve portion 43 is further pressed so as to be caulked to obtain a finished product.

[0004]

However, each of the round pin terminals constructed as described above has the following problems. That is, the round pin terminal shown in FIG. 5 has a large number of parts because the cylindrical spring 35 is interposed,
At the same time, there is a problem that the number of assembling steps increases, and a dedicated die for bending the tip corner portion 35A of the tubular spring 35 outward is required, which is a cost disadvantage. Further, since the connection between the socket body 31 and the metal sleeve 33 is made by soldering or welding, there is a problem in workability.

Further, in the round pin terminal shown in FIG. 6, since the contact portion 41, the cable connecting portion 42 and the sleeve portion 43 are integrally punched, an unnecessary portion generated at the time of punching, that is, a punching discard portion is increased, Further, since it has a complicated shape such as including the narrow connecting portion 46, in addition to the problem that the die for punching becomes expensive, the defect occurrence rate at the time of punching becomes high, and the cost is likely to increase.

Further, bending and pressing also require multiple steps and require special dies. In particular, since a slight deviation is likely to occur during the reverse bending work of the sleeve portion 43 at the time of assembly, it requires skill to perform the work, and it is difficult to ensure product uniformity, and the sleeve portion 43 is processed into a tubular shape. At that time, the shape may be distorted and the appearance may vary, which causes a problem in yield.
Besides, it is difficult to automate these tasks,
It is difficult to reduce costs.

An object of the present invention is to solve the above problems, that is, it has a simple structure with a small number of parts, and the fitting and locking of the sleeve portion in the assembling process is simple and It is an object of the present invention to provide a round pin terminal that can be reliably carried out.

[0008]

The above object is to provide a round pin terminal composed of a terminal body having an electric wire connecting portion and a sleeve tube fitted and assembled to the terminal body, wherein the terminal body is the sleeve. An end portion of an electric wire connecting portion having a diameter larger than the inner diameter of the pipe and a spring portion having a diameter smaller than the inner diameter of the sleeve pipe and having a slit formed along the axial direction of the small diameter portion are integrated via an inclined portion. The present invention is achieved by a round pin terminal characterized in that the sleeve tube is fitted to the spring portion and the tip of the spring portion is expanded.

[0009]

In the round pin terminal according to the present invention, the sleeve tube is fitted and inserted in the spring portion having a small diameter portion, and the portion of the spring portion projecting from the end of the sleeve tube is expanded in diameter. Is attached to the terminal body in a state of being sandwiched between the inclined surface portion and the tip of the expanded spring portion. Therefore, the sleeve tube does not fall out of the terminal body and is reliably locked. Moreover, the number of parts is small, and it is excellent in parts management and cost. Further, in the assembling method, the sleeve pipe can be fitted into the spring portion and the diameter of the portion of the spring portion protruding from the end of the sleeve pipe can be increased by an appropriate jig, which is excellent in workability and can be automated. It is also possible to deal with.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a round pin terminal according to the present invention will be described below with reference to FIGS. However, it goes without saying that the present invention is not limited to this embodiment. FIG. 1 is a perspective view showing the structure of a round pin terminal according to the present invention when the assembly is completed. In the figure, a round pin terminal A according to the present invention comprises a terminal body 1 and a sleeve tube 2.

As shown in FIGS. 2 and 3, the terminal body 1 has a connecting portion 6 forming a rear portion, a sloped portion 5 forming a front portion, a press-fitting portion 3 and a spring portion 4 which are connected to each other. Consists of
Here, FIG. 2 is a perspective view showing a state before assembling the round pin terminal A shown in FIG. 1, and FIG. 3 is a top view corresponding to FIG. The connection portion 6 is for inserting a cable (not shown) and fixing it to the terminal A by means such as caulking. The end portion 6A on the side of the spring portion 4 described later is larger than the inner diameter of the sleeve tube 2. Is also formed with a large diameter.

The spring portion 4 is formed to have a diameter slightly smaller than the inner diameter of the sleeve tube 2 over a predetermined length, and is connected to the end portion 6A of the connecting portion 6 via the inclined surface portion 5. Further, a slit 4B extending in the axial direction from the tip 4A of the spring portion 4 toward the connecting portion 6 is formed. Further, the tip 4A is formed with a notch 4C which is slightly notched in the axial direction so as to face the slit 4B. The slit 4B and the notch 4C of the spring portion 4 contribute to easily and smoothly expanding the diameter of the spring portion tip 4A described later.

The press-fitting portion 3 has an outer diameter dimension that is the same as or slightly larger than the inner diameter of the sleeve tube 2, and is formed continuously with the inclined surface portion 5. The sleeve tube 2 is a cylindrical member, and its axial length (L) is the length (M) from the cut 4C end of the spring portion 4 to the boundary between the press-fitting portion 3 and the sloped portion 5. Is set to be approximately equal to. The round pin terminal A according to the present invention is configured as described above.

Next, the procedure for assembling the round pin terminal A will be described with reference to FIG. First, the sleeve tube 2 is fitted into the spring portion 4 of the terminal body 1 from the left side in the drawing from the state shown in FIG. 3, and is pushed in until it is fitted into the press-fitting portion 3. Thereby,
The sleeve tube 2 is temporarily held in a state in which a portion of the spring portion 4 at the tip of the notch 4C protrudes from the end portion of the sleeve tube 2. In such a state, as shown in FIG. 4, a simple general-purpose jig 10 having a conical surface is pushed in the direction of the arrow in the drawing, and the portion of the tip 4A of the spring portion 4 protruding from the sleeve tube 2 is bent. To increase the opening diameter. This figure shows
The state in which the tip 4A of the spring portion 4 is expanded by the jig 10 is shown in FIG.
Is attached to the terminal main body 1 in a state of being sandwiched between the inclined surface portion 5 and the enlarged diameter tip portion 4A of the spring portion. At that time, the variation in the axial length (L) of the sleeve tube 2 is caused by the sleeve tube 2
Riding on the slope 5 of the spring or the tip 4A of the spring 4
Since it can be absorbed depending on the degree of expansion of the diameter, the manufacturing accuracy of the sleeve tube 2 is not so high.

[0015]

As described above, in the round pin terminal according to the present invention, the sleeve tube is fitted and inserted in the spring portion, which is the small diameter portion, and the portion of the spring portion projecting from the end of the sleeve tube is expanded in diameter. Due to this structure, the sleeve tube is attached to the terminal body in a state of being sandwiched between the inclined surface portion and the tip of the expanded spring portion. Therefore, the sleeve tube is securely locked without falling off from the terminal body. Moreover, variations in the axial length of the sleeve pipe can be absorbed by riding on the slope or by increasing the diameter of the tip of the spring portion, so that manufacturing precision of the sleeve pipe is not required. Moreover, the number of parts is small, and it is excellent in parts management and cost. Further, in the assembling method, the sleeve pipe can be fitted into the spring portion and the diameter of the portion of the spring portion protruding from the end of the sleeve pipe can be increased by an appropriate jig, which is excellent in workability and can be automated. Is also available,
The cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a round pin terminal according to the present invention when assembled.

2 is a configuration perspective view of the round pin terminal shown in FIG. 1, and is a perspective view of the round pin terminal before assembling.

3 is a top view of the round pin terminal shown in FIG. 2. FIG.

FIG. 4 is a top view of the round pin terminal shown in FIG. 1, and is a view for explaining a method of assembling the round pin terminal.

FIG. 5 is a cross-sectional view of a conventional round pin terminal.

FIG. 6 is a perspective view of another conventional round pin terminal.

[Explanation of symbols]

 A Round pin terminal 1 Terminal body 2 Sleeve tube 3 Press-fitting part 4 Spring part 4A Tip 4B Slit 4C Notch 5 Slope 6 Connection part 10 Jig

Claims (1)

[Claims] 1. A round pin terminal composed of a terminal body having an electric wire connecting portion and a sleeve tube fitted and assembled to the terminal body, wherein the terminal body has a diameter larger than an inner diameter of the sleeve tube. With a diameter smaller than the inner diameter of the electric wire connecting portion and the sleeve tube,
And the spring portion formed with a slit along the axial direction of the small diameter portion and the spring portion are integrally formed through the inclined portion,
A round pin terminal, wherein the sleeve tube is fitted to the spring portion, and a tip of the spring portion is expanded.