JPH0119831Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a pin jack device in which a pin jack is attached to a jack mounting board.

As a conventional pin jack device, for example, the first
The structure shown in the figure is well known.

That is, as shown in FIG. 1, a cylindrical bush 3 into which a contact 2 is inserted from the front side is inserted into a cylindrical cover 5 from the front side together with a washer 4, and then the cover 5 is inserted into a cylindrical bush 3 from the front side. By tightening the front end peripheral edge 5a, the bush 3, cover 5, etc. are integrated to form the pin jack 1, and the rear end of the pin jack 1, that is, the cover 5 is inserted into the jack mounting hole 7a of the jack mounting board 7. At the same time, the annular part 8a of the ground terminal 8 is inserted into the rear end of the cover 5.
By tightening b, the pin jack 1 is attached to the jack mounting board 7, and the cover 5 and the ground terminal 8 are integrated.

However, for a structure like this,
Assembly of pin jack 1 and jack mounting board 7
In order to attach the cover to the cover, it is necessary to tighten the front and rear peripheral edges 5a and 5b of the cover 5, respectively, which has the drawback of extremely poor workability. Furthermore, the jack mounting board 7 on which the pin jack 1 is to be mounted by crimping the rear edge 5b of the cover 5 is generally made of a synthetic resin material that does not have very high mechanical strength. Therefore, if the crimping force is too large, there is a risk of damage to the board 7, whereas if the crimping force is too small, the pin jack 1 cannot be properly attached, resulting in problems due to variations in the crimping force.

Furthermore, since the cover 5 and the ground terminal 8 are integrated by crimping, there is a risk that poor contact will occur between the two, making it difficult to maintain good performance over a long period of time. do not have. Moreover, since the cover 5 and the ground terminal 8 are separated and the washer 4 is required,
This increases the number of parts, increases the number of work steps, and is uneconomical.

Furthermore, since the bushing 3 is fitted into the cover 5 from the front side, the shape of the bushing 3 is inevitably limited, so a switch mechanism that is switched in response to the insertion and removal of a pin, for example, is incorporated. It cannot be used in cases where it is necessary to have such a switch mechanism built-in, and its uses are greatly limited.

The object of the present invention is to provide a pin jack device that eliminates all of the above-mentioned drawbacks of conventional pin jack devices.

In order to achieve the above object, the present invention forms a jack mounting hole in the form of a spline hole in a jack mounting board, which has a plurality of anti-rotation protrusions projecting inward from the periphery of the hole. A cylindrical cover made of a conductive material is attached to the jack mounting board with the engagement arm and the ground terminal, which are integrally connected rearward from the rear end periphery, inserted between the adjacent anti-rotation protrusions. By inserting it into the jack mounting hole from the front side, it is held on the jack mounting board with the rear edge in contact with the front of the jack mounting board, and the cylindrical part is inserted into the insulating bushing. When the mounting board is inserted into the cover by a predetermined amount through the jack mounting hole from the rear side of the mounting board, it comes into contact with the rear surface of the jack mounting board and works with the rear edge of the cover to compress the jack mounting board. The cover is provided by forming an engaged portion in which the connecting portion and the engaging portion of the engaging arm are engaged with each other in a concave and convex manner, and causing the engaging portion of the engaging arm and the engaged portion to be engaged in a concave and convex manner. and a bush are integrally connected with the jack mounting board compressed from the front and back, and contacts made of a highly conductive material are inserted into the bush.

Next, the present invention will be specifically explained based on the embodiment shown in FIGS. 2 and 3.

FIG. 2 shows the two pin jacks 1 installed on the jack mounting board 11 and before installation.
2,12 are shown.

The jack mounting board 11 has four anti-rotation protrusions 13b that protrude inward from the periphery 13a of the hole.
Spline-shaped jack mounting holes 13, 13, .

The pin jack 12 includes a cylindrical cover 14 formed of a highly conductive material with a front end periphery 14a bent inward, a cylindrical portion 15a that can be fitted into the cover 14, and a contact insertion portion connected to the rear of the cylindrical portion 15a. It consists of a bush 15 molded from an insulating material such as synthetic resin into a shape with a fitting part 15b, and a contact 22 made of a highly conductive material that is inserted into the bush 15. Note that the diameter of the cover 14 is the same as that of the jack mounting hole 13.
The diameter of the peripheral edge 13a is substantially the same as that of the peripheral edge 13a.

A pair of engaging arms 16, 16, an auxiliary arm 17, and a ground terminal 18 are provided on the rear end peripheral portion 14b of the cover 14.
are integrally connected towards the rear. Both engaging arms 16, 16, auxiliary arm 17, and ground terminal 18 are arranged to face each other. The opposing intervals in the circumferential direction of these 16 to 18 are determined by the rotation prevention protrusion 1
3b, and each arm 16,1
7 and the ground terminal 18 are inserted into the jack mounting hole 13, each arm 16, 17 and the ground terminal 18 are inserted into the jack mounting hole 13.
are inserted between adjacent anti-rotation protrusions 13b, 13b in sliding contact with the peripheral edge 13a. Therefore, the cover 14 covers each arm 16,
17 and ground terminal 18 to the jack mounting board 11.
By inserting it into the jack mounting hole 13 from the front surface 11a side of the jack, the rear end peripheral edge portion 14b is brought into contact with the front surface 11a of the jack mounting board 11, which is the front surface of the anti-rotation protrusions 13b, 13b, and the rotation is prevented. It is configured such that it can be held on the jack mounting board 11 while being prevented from rotating by the protrusions 13b, 13b, . . . . At the end of each engagement arm 16,
An engagement portion, that is, a rectangular engagement hole 16a is formed. Note that the terminal portion 18a of the ground terminal 18 is
The cover 14 is attached to the jack mounting board 11 as described above.
After holding it in place, bend it downward.

Further, when the cylindrical portion 15a is inserted into the outer peripheral portion of the cylindrical portion 15a of the bush 15 by a predetermined amount into the cover 14 held as described above through the jack mounting hole 13 from the rear surface 11b side of the jack mounting board 11, , four passage grooves 19, 19, . Entering groove 20
a, and a wedge-shaped engagement convex portion 21, which is an engaged portion in which the engagement hole 16a of each engagement arm 16 can be engaged with the concavity and convexity using the elasticity of the material. 21 (one not shown) are formed respectively. Therefore, the cylindrical part 15 of the bush 15
When the cover 14 and the bushing 15 are fitted into the cover 14 from the rear surface 11b side of the jack mounting board 11 through the jack mounting hole 13, the cover 14 and the bush 15 engage with the engagement hole 16a of each engagement arm 16. Part 21
By the engagement action with the rear end peripheral edge 14b of the cover 14 and each contact portion 20, the jack mounting board 11 is pressed from the front and back, and is integrally connected. .

The contact 22 is a plate-shaped member having bifurcated electrode portions 22a, 22a at the front end, and is press-fitted from the rear side of the bushing 14.
The wedge-shaped engaging portion 22b is engaged with the engaging portion 14c of the contact insertion portion 14b by utilizing the elasticity of the material, and is inserted and fixed into the bush 14.

Therefore, according to the configuration of the present invention, the cover 1
4, each engaging arm 16, auxiliary arm 17, and ground terminal 18, which are connected from the rear end peripheral portion 14b, are inserted into the jack mounting hole 13 from the front surface 11a side of the jack mounting board 11 in a state in which they are prevented from rotating. , the rear edge portion 14b is the front surface 1 of the jack mounting board 11.
1a and hold it in contact with contact 2.
2 is inserted into the cylindrical part 15a of the bush 15.
The pin jack 12 can be assembled and attached to the jack mounting board 11 at the same time by simply press-fitting it into the cover 14 from the rear surface 11b side of the jack mounting board 11 through the jack mounting hole 13. The number of processes is greatly reduced and workability is extremely good. Furthermore, since no crimping work is required, there are no problems caused by variations in crimping force.

Further, since the cover 14 and the ground terminal 18 are integrally molded, problems such as poor contact do not occur at all. In connection with this, the number of parts is also significantly reduced, which is advantageous from both operational and economical points of view.

From this point of view, the possibility of defective assembly of the pin jack 12 or defective attachment to the jack mounting board 11 is extremely reduced.

Further, the cylindrical portion 1 on the front end side of the bush 15
5a is inserted into the cover 14 from the rear surface 11b side of the jack mounting board 11, the shape of the rear side of the bush 14 (the contact insertion portion 15b in the above embodiment) can be freely designed, that is, the switch mechanism can be freely designed. It can be formed into a shape that can secure a space for incorporating the following, and therefore can have various structures and is not limited in its range of use.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional example, FIG. 2 is a perspective view showing an embodiment of the present invention, and FIG. 3 is a sectional view showing an assembled state (the cross section is taken along the - line in FIG. 2). 11... Jack mounting board, 12... Pin jack, 13... Jack mounting hole, 13a... Periphery, 13b... Rotating protrusion, 14... Cover,
14b... Rear end periphery, 15... Bush, 15
a...Cylindrical part, 16...Engagement arm, 16a...Engagement hole (engagement part), 18...Earth terminal, 20...
Contact portion, 21... Engaging convex portion (engaged portion), 22...
…contact.

Claims (1)

[Scope of utility model registration request] A jack mounting hole in the form of a spline hole having a plurality of anti-rotation protrusions protruding inward from the periphery of the jack mounting board is formed on the jack mounting board, and a cylindrical cover made of a highly conductive material is attached to the rear end of the jack mounting hole. By inserting the engaging arm and the ground terminal, which are integrally connected rearward from the peripheral edge, into the jack mounting hole from the front side of the jack mounting board while being engaged between the adjacent anti-rotation protrusions. Then, hold it on the jack mounting board with the rear edge in contact with the front surface of the jack mounting board, and insert the cylindrical part into the jack mounting hole from the rear side of the jack mounting board through a bush made of insulating material. When the cover is inserted into the cover by a predetermined amount, a contact portion that contacts the rear surface of the jack mounting board and works with the rear end periphery of the cover to compress the jack mounting board, and an engaging portion of the engaging arm. By forming engaged portions that engage in a convex and concave manner, and by engaging the engaging portion and the engaged portion of the engaging arm in a concave and convex manner, the cover and the bush are compressed from the front and rear of the jack mounting board. 1. A pin jack device characterized in that the pin jack device is integrally connected in a state in which the pin jacks are connected together, and a contact made of a highly conductive material is inserted into the bush.