JPH0214143Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a jack that is particularly designed to be miniaturized.

``Prior Art'' In conventional jacks, the contacts are generally held in the body by fitting and inserting them into integral holding grooves formed in the body of an insulating material. However, especially when attempting to make the device compact, it becomes difficult to provide a space for forming the holding groove for holding the contact. Furthermore, when the size is significantly reduced, it becomes difficult to maintain good electrical insulation between the plurality of contacts within the body.

The purpose of this invention is to provide a jack that can hold contacts without using a pair of holding grooves and that can be significantly downsized while maintaining good insulation between the contacts.

``Means for solving the problem'' According to this invention, one side of the insulating body is open, and the open side is covered with an insulating cover.
A first contact is disposed on the inner surface of the body facing the cover, and the first contact is pressed and held by the body by a support portion integrally formed on the inner surface of the cover. Further, a second contact is disposed within the body, and a holding portion is formed integrally with the second contact,
The holding portion is inserted into a holding groove formed in the support portion substantially parallel to the plate surface of the cover, and the second
A contact is retained within the body.

"Embodiment" An embodiment of this invention will be described with reference to FIGS. 1 to 3. The body 11 made of insulating material has a substantially rectangular box shape, and in this example, the top surface is open, and the open surface is covered with a rectangular cover 12 made of insulating material. A plug insertion hole 13 is formed in the front plate 11a of the body 11. In the figure, the plug insertion hole 13 is a circular hole. The front plate 11a is made higher than the left and right side plates 11b, 11c, and the back plate 11d, and notches 14, 15 are formed in the upper edges of the side plates 11b, 11c in contact with the front plate 11a, and the back plate Notches 1 on both sides of the upper edge of 11d
6 and 17 are formed, and a central portion 18 between these protrudes. The cover 1 includes claws 21 to 24 that correspond to the notches 14 to 17 and are fitted into these.
2, respectively, are integrally formed on both front and rear ends. The thickness of these claws 21 to 24 is approximately the same as the depth of the notches 14 to 17, and is formed in contact with the upper surface of the cover 12, and is smaller than the thickness of the cover 12. Therefore, part of the thickness of the cover 12 is the front plate 11a of the body 11 and the side plate 11.
b, 11c, and are inserted in contact with the back plate 11d. The inner surface of the cover 12 is formed with a circular arc surface 26 that is coaxial with the plug insertion hole 13 and has the same diameter as the circular hole.

A pin contact 27 is disposed as a first contact on the surface of the body 11 facing the cover 12, that is, in this example, on the bottom plate 11e of the body 11. That is, the pin contact 27 is arranged concentrically on an extension of the center of the plug insertion hole 13, and its rear end is substantially in contact with the back plate 11d. A terminal 28 is integrally extended downward from the rear end at a substantially right angle, and the terminal 2
8 protrudes from the body 11 through a slit 29 formed in the bottom plate 11e. A short small leg piece 31 is integrally formed from the rear end of the pin contact 27 facing the terminal 28, and the lower end of the small leg piece 31 is in contact with the bottom plate 11e, and even in this state, the pin contact 27 is not inserted into the body 11. Retained. The pin contact 27 is made by, for example, bending a metal plate into a cylindrical shape, bending the front ends of the metal plate inward in an arc shape to form a hemispherical shape as a whole, and extending the terminal 28 and the small leg piece 31 integrally from the rear end. Can be done. In this example, the rear end of the bottom plate 11e is connected to the cover 12.
It has a raised bottom part 32 that is raised higher on the side.
The terminal 28 is inserted through this raised bottom portion 32.

A fixed contact piece 3 is provided in the body 11 as a second contact.
3 is placed. The fixed contact piece 33 is located between the side plate 11c and the pin contact 27, faces the side plate 11c near the pin contact 27, and faces the side plate 11c.
It is arranged almost in contact with 1d. The upper edge of the rear end of the fixed contact piece 33 is extended slightly upward, and then the side plate 1
The holding part 3 is bent and extended at a substantially right angle to the 1b side.
4, and the holding portion 34 is bent and extended at a substantially right angle toward the bottom plate 11e at a position where it almost contacts the side plate 11b to form a terminal 35. The terminal 35 is
At the bottom raised part 32 of the bottom plate 11e, the side plate 11
It protrudes to the outside of the body 11 through a slit 36 formed almost in contact with b. In addition, fixed contact piece 3
3 is in contact with the bottom raised portion 32, and the fixed contact piece 33 is held within the body 11. In order to increase the stability of its holding, the projecting piece 37 is placed opposite the fixed contact piece 33.
is formed integrally with the terminal 35, and the projecting piece 37 is in contact with the top of the raised bottom part 32.

Further, in this embodiment, a movable contact piece 38 is provided within the body 11 as a third contact. The movable contact piece 38 substantially faces the side plate 11c, extends back and forth, and is formed integrally with the frame-shaped attachment portion 39. The frame-shaped attachment part 39 is a rectangular plate-shaped frame, and is in contact with the side plate 11c, and its front edge is connected to the front plate 11c.
It is almost in contact with a. Contact piece holding protrusions 41 and 42 are provided on the bottom plate 11e, facing the side plate 11c, integrally with the front plate 11a, and at the front and rear central portions, respectively.
It is erected in one piece on top. A frame-shaped attachment portion 39 is inserted between these contact piece holding protrusions 41, 42 and the side plate 11c, and the movable contact piece 38 is held. The front end of the movable contact piece 38 is integrally attached between the frame-shaped attachment parts 39, and the side plate 1 is attached from that position.
After extending diagonally to the rear with respect to 1c, side plate 1
1c, and a contact 43 is pushed out toward the side plate 11b at its substantially parallel free end, and this contact 43 is elastically in contact with the fixed contact piece 33 from the side plate 11c.

As shown in FIG. 1, the side plate 11 of the movable contact piece 38
The contact piece holding protrusion 4 faces the part oblique to c.
1 and 42 are respectively oblique surfaces. Note that the surface of the contact piece holding protrusion 41 opposite to the side plate 11c is a part of the cylindrical peripheral surface so as to be continuous with the circular inner peripheral surface of the plug insertion hole 13. A terminal 44 is integrally formed from the rear end of the frame-shaped attachment part 39, and the terminal 44 is inserted into the slit 4 formed in the raised bottom part 32 of the bottom plate 11e.
5 and protrudes from the body 11. Corresponding to the bottom raised part 32, the frame-shaped attachment part 39 has a stepped part 39.
a is formed. The upper edge of the front end of the frame-shaped attachment part 39 is slightly extended upward, and the extended upper edge 39b is inserted into a linear recess 46 formed in the front-rear direction at the edge of the cover 12 on the claw 22 side. .

A support portion 47 is integrally formed to protrude from the center of the rear end of the inner surface of the cover 12 , and the pin contact 27 is held and held by the support portion 47 on the body 11 . The surface of the support portion 47 that comes into contact with the pin contact 27 is a concave curved surface that substantially follows the outer peripheral surface of the pin contact 27 so that the support portion 47 can be held down well. Further, a holding groove 48 is formed in the supporting part 47 on a surface parallel to the plate surface of the cover 12, in contact with the inner surface of the cover 12 in this example, and facing the back plate 11d. The supporting portion 34 is inserted to stably hold the fixed contact piece 33. The support part 47 is the back plate 1
1d, and the holding part 34 is held by the back plate 11d.
does not come out of the holding groove 48.

A pair of left and right bosses 49 are formed on the front portion of the outer surface of the bottom plate 11e. Cover 12 and body 1
1 and are fixed to each other by, for example, ultrasonic welding.
The above-mentioned jack is attached to, for example, a magnetic recorder, and when a cylindrical plug connected to an external power source is inserted into the plug insertion hole 13, the movable contact piece 38 is elastically displaced by the plug and separated from the fixed contact piece 33. At the same time, a movable contact piece 38 is attached to the outer metal of the plug.
are in elastic contact with each other, and the pin contact 27 is inserted into the cylindrical plug to establish a connection with an external power source and to cut off the built-in power source.

This invention is applicable not only to jacks for such cylindrical plugs, but also to jacks for plugs that have a tip at the tip, a ring insulated behind the tip, and a sleeve insulated behind the tip, and other jacks. For example, in the above example, the third contact 38 may be omitted, the first and second contacts 27 and 33 may be used, and one of them may be used as a movable contact piece.

"Effects of the Invention" As described above, according to the jack of this invention, the first contact 27 is pressed and held within the body 11 by the support part 47 formed integrally with the cover 12, and the pair of holding grooves are Not used. In addition, the second contact 33 is held by the holding groove 48 formed in the support portion 47, so that the contact can be held in a small space, and miniaturization is possible. In addition, these two contacts 27 and 33 are held by a support part 47, and a part of the support part 47 is interposed between the first contact 27 and the second contact 33, thereby increasing the insulation between these contacts. Therefore, from this point of view as well, the contact 27 and the contact 33 (more precisely, the holding portion 34 thereof) can be brought close to each other, and miniaturization becomes possible.

As in the above embodiment, the cover 12 is placed on the top side of the body 11, and the terminals 28, 35, 44 are placed on the bottom plate 11.
If it protrudes from e, when this jack is attached to the wiring board, body 1 will be located near the wiring board.
Since there is no seam in the body 11, it is difficult for solder flux to flow into the body 11 during connection with the wiring of the wiring board. In addition, as mentioned above, since miniaturization is possible, the bottom plate 11
A raised bottom part 32 can be formed on the raised bottom part 32, and in this case, by leading out the wiring board and the terminals 28, 35, 44 from the raised bottom part 32, a space can be created between the leading surface and the wiring board. This makes it more difficult for solder flux to enter the body 11. Further, as described above, the front edge of the cover 12 abuts against the front plate 11a, and the holding groove 48 is connected to the support portion 47.
If the cover 12 is attached to the body 11 while inserting the holding part 34 into the holding groove 48 from the back side, the back side of the holding groove 48 will be closed by the back plate 11d, and the holding part 34 and contact 27
This improves the insulation between the two and ensures reliable retention.

[Brief explanation of the drawing]

FIG. 1 is a horizontal sectional view showing an example of the jack according to this invention, FIG. 2 is a sectional view taken along line AA (vertical) of the jack of FIG. 1, and FIG. 3 is an exploded perspective view of the jack of FIG. 1. 11: Body, 12: Cover, 13: Plug insertion hole, 27: Pin contact as first contact, 33: Fixed contact piece as second contact, 34:
Holding part, 38: Movable contact piece as a third contact, 4
7: Support part, 48: Holding groove.

Claims (1)

[Scope of utility model registration request] An insulating material body with a plug insertion hole on one side,
an insulating cover covering the open surface of the body;
a first contact disposed on the inner surface of the body facing the cover; a support portion integrally formed on the inner surface of the cover to press the first contact against the body; and a support section disposed within the body. a second contact; and a holder that is formed integrally with the second contact and that is inserted into a holding groove formed in the support section substantially parallel to the plate surface of the cover to hold the second contact. A jack comprising a section.