JPS5936858Y2 - pin jack - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pin jack in which a plate-shaped contact called a fork shape or the like is inserted into a slit provided in a bushing.

This type of bottle jack has a slit in the inner surface of a cylindrical bushing made of an insulating material that opens at the rear end of the bushing, a plate-like fork-shaped contact is inserted into the slit, and a plate-like fork-shaped contact is inserted into the bushing at the front end. It is known that a plug inserted from the contact can be press-fitted between the bifurcated electrode portions of the contact.

However, in the conventional type, after a contact is inserted into a slit of a bushing, an end cap that closes the slit is fixed to the rear end of the bushing, thereby fixing the contact within the bushing.

Therefore, there was a drawback that the number of parts was large and manufacturing was time-consuming.

The present invention was developed in light of these circumstances, and utilizes the elastic change in the slit when the contact is press-fitted to the engagement convex part provided on the contact into the engagement recess provided on the inner wall surface of the slit of the bushing. The present invention aims to provide a pin jack that has a small number of parts and is easy to assemble by engaging the pin jack with a small number of parts.

An embodiment of the present invention will be described below with reference to the drawings.

A slit 3 opening at the rear end surface of the bushing 2 is provided on the inner surface of a cylindrical bushing 2 having a plug insertion hole 1 in the shaft center, and a contact 4 is inserted into the slit 3.

The bushing 2 is made of an elastic insulating material such as synthetic resin, and has a tubular ground terminal 5 fitted around the outer periphery of its cylindrical front end.

This bushing 2 is inserted into a mounting hole 1 of a suitable board 6.

To attach the bushing 20 to the board 6, tongue-shaped mounting legs 8, 8 are integrally provided protruding from the rear end of the ground terminal 5, and a portion corresponding to the mounting leg 8 is provided near the mounting hole of the board 6. Push-insertion holes 9, 9 are provided.

Further, the front edge of the ground terminal 5 is bent inward in advance along the front end surface of the bushing 2, while the back side of the board 6 has a mounting hole 1 similar to that of the board 6 and a push-in hole. A terminal plate 11 having insertion holes 9, 9 is attached.

1. After fitting the ground terminal 5 to the front end of the bushing 2, the bushing 2 is inserted into the mounting hole I of the board 6 and the terminal plate 11, so that the stepped end face 12 provided on the outer surface of the bushing 2 is connected to the board 6. At the same time, the mounting legs 8, 8 of the ground terminal 5 are passed through the insertion holes 9, 9 of the board 6 and the terminal plate 11.

Then, the front end surface of the bushing 2 is supported by a receiving mold (not shown) via the front end bent portion 5a of the ground terminal 5, and the through end portions 8a, 8a of the mounting legs 8, 80 are connected to the back surface of the terminal plate 11. I try to tighten it to the side.

On the other hand, the contact 4 has bifurcated electrode portions 4a, 4 on the front end side.
The plug electrode inserted into the plug insertion hole 1 of the bushing 2 is press-fitted between the electrode portions 4a of the contact 4.

Reference numeral 4b denotes a connection terminal portion integrally formed at the rear end portion of the contact 4.

The contact 4 is attached to the bushing 2 as follows.

That is, the rear end of the slit 3 is also opened on the outer circumferential surface of the bushing 2, so that the rear end of the bushing 2 is connected to the slit 3.
It is designed so that it can be easily elastically deformed in the direction of increasing its width.

Then, an engaging recess 1 is formed on the inner wall surface of the rear end of the slit 3.
3 and 13, and the contact 4 is provided with engaging protrusions 14, 14, and the engaging protrusions 14, 14 are inserted into the engaging recesses 13, 13 to prevent elastic changes in the slit width when the contact is press-fitted. It is used to engage.

The engagement recesses 13, 13 are rectangular holes that communicate the inner wall surface of the slit 3 and the outer surface of the bushing 2.
They are provided in pairs on both sides.

The retaining protrusion 14 is a tongue-like piece formed by cutting and raising both side edges of the contact 4 toward one side, and has the function of expanding the width of the slit 3 with its slope 14a.

With such a configuration, simply by press-fitting the contact 4 into the slit 3, the engaging protrusion 14 of the contact 4 can be removed.
, 14 engage in the engagement recesses 13.13 of the slit 3, and the contact 4 is held in the slit 3 in a manner that cannot be removed.

Therefore, there is no need to open the rear end of the slit using an end cap or the like, and the number of parts and assembly steps can be reduced.

Moreover, since the rear end 3 of the slit 3 is opened on both outer surfaces of the bushing 20 to promote elastic change in the width of the slit, unreasonable force is applied to the bushing 2 when the contact 4 is press-fitted. There are no such inconveniences, and
Since there is no need to elastically deform the engaging convex portion 14 of the contact 4, there is an advantage that the contact 4 can be made sturdy with sufficient wall thickness to cope with the plug insertion/extraction force that is frequently applied.

It goes without saying that the structure for attaching the bushing to the board is not limited to the above-mentioned structure.

However, as described above, the front end edge of the ground terminal 5 is bent in advance along the front end surface of the bushing 2, and the ground terminal 5 is inserted through the board 6 and the terminal plate 11 from the rear end. The mounting leg 8 is integrally provided, and the bushing 2
If the tip of the mounting leg 8 is caulked to the back side of the terminal plate 11 while the front end surface of the bushing 2 is supported by a mold through the front end bent portion 5a of the ground terminal 5, the bushes 2 and A compressive force is applied to the substrate 6 in the front-rear direction.

Therefore, after the caulking operation is completed, the caulked state is strengthened by the elastic repulsive force of the bush 2 and the base plate 6, and there is an advantage that the caulked portion is less likely to loosen or rattle.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a side sectional view, FIG. 2 is a sectional view taken along the line II-U in FIG.
The sectional view taken along the line ■-■ in the figure, and FIG. 4 is a perspective view. 2...butsu, 3...slit, 4
...Contact, 13...Engagement recess,
14... Engagement protrusion.

Claims (1)

[Scope of utility model registration request] In a pin jack in which a slit is provided on the inner surface of a bushing made of an insulating material and opens at the rear end surface of the bushing, and a plate-shaped contact is inserted into the slit, the rear end of the slit is connected to the outer circumferential surface of the bushing. An engaging recess is provided on the inner wall surface of the rear end of the slit, and an engaging protrusion is provided on the contact. A pin jack characterized in that the engagement is made using the elastic change of the pin jack.