JPH0126067Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement in a jack.

Jacks generally have a plug insertion hole in the front end of a casing molded from a synthetic resin material, and a plurality of contact springs are inserted into the casing so as to contact the plug inserted through the plug insertion hole. is known, and this contact spring is inserted into a guide groove integrally formed in the casing from the back side.

However, in such a jack, the structure of the molded casing is complicated, and the contact springs are inserted into narrow grooves in the casing, which requires a large number of assembly steps, and the work is difficult due to the insertion into narrow positions. It was something that came with it.

In particular, in a jack with a switching function, the movable contact part of the tip spring and the contact terminal part of the switching terminal piece must be in contact with a predetermined pressure, and assembly work while applying initial stress is extremely complicated and inefficient. It was a bad one.

The present invention has been devised to solve the above-mentioned problems, and its gist is to provide a casing having a plug insertion hole on the front end surface, and a plug inserted into the casing through the plug insertion hole. In the jack comprising a contact spring that contacts the casing, the casing has a shape having an open portion with an open bottom and rear surface, and a plug insertion guide having the plug insertion hole is integrally provided on the front end surface and projects from the front end surface, The opening part is closed by an insulating base which integrally includes a bottom plate and a back plate corresponding to the opening part, and is inserted and loaded into the casing from the back side of the casing, and when the plug is inserted, the sleeve of the plug is closed. A sleeve spring having a U-shaped contact piece portion whose inner surface contacts the outer periphery of the sleeve and clamps the sleeve is fitted into a support frame protruding from the top surface of the front end of the bottom plate corresponding to the position of the plug insertion guide. A tip spring is supported on the top surface of the bottom plate and has a movable contact portion at its tip that protrudes to the inserting position of the tip of the plug when the plug is removed and is pressed and displaced by the outer periphery of the tip when the plug is inserted. , a switching terminal piece provided with a contact terminal portion with which the movable contact portion comes into contact when the plug is removed and is displaced and separated when the plug is inserted, with a support portion provided on the inner surface of the back plate; The jacket is characterized by its support.

Next, an example of implementation of the present invention will be described with reference to the drawings.

In the figure, 1 is an insulating casing molded from synthetic resin. This casing 1 has an open bottom and back surface, and a plug insertion guide 2 is provided protruding from the front end surface, and a plug insertion hole 3 is opened through the center of the guide 2. An insulating base 4 is inserted into the casing 1 from the back side. This insulating base 4 has a bottom plate 5 that closes the bottom surface of the casing 1 and a back plate 6 that closes the back surface of the casing 1, which are integrally formed in an L-shaped arrangement, with both side edges of the bottom plate 5 facing the inner surface of the casing 1 in the front-rear direction. It is inserted into the fitting groove 7 and loaded into the casing 1. A locking pawl 8 formed protruding from the bottom plate 5 is engaged with an engaging step 9 opened in the fitting groove 7 to prevent it from coming off.

Supported on this insulating base are a sleeve spring 11, a cap spring 12, which contacts the plug 10 inserted through the plug insertion hole 3, and a switching terminal piece 13, which contacts the tip spring 12 when the plug 10 is removed.

The sleeve spring 11 includes a U-shaped contact piece portion 11a that holds the sleeve of the plug 10, and the contact piece portion 11 of the U-shaped contact piece portion 11a.
a and a leg portion 11b integrally molded with the bottom plate 5, and a contact piece portion 11a that protrudes from the upper surface of the front end of the bottom plate 5 and is fitted and supported within the support frame 14.
The leg portions 11b protrude below the bottom plate 5 by penetrating through them.

The tip spring 12 has a flat base 12a and a base 1.
Contact piece part 12b folded back in a U shape from the front end of 2a
and a leg portion 12c bent below the rear end of the base portion 12a, and the contact piece portion 12b is formed in a T-shape with both wings serving as movable contact portions 12d. The tip spring 12 has a leg portion 12c that penetrates the bottom plate 5 and protrudes below the bottom surface, and is supported with the lower surface of the base portion 12a in contact with the upper surface of the bottom plate 5.

The switching terminal piece 13 is formed into a U-shape and consists of a contact terminal part 13a which is arranged parallel to each other and has both ends extended onto the contact piece part 12b of the tip spring 12, and a leg part 13b integrally molded therewith. 6
The leg portion 13b is inserted into the mounting groove 15 formed on the inner surface of the holder and is supported by the support portion 16.
b protrudes below the bottom plate. When the switching terminal piece 13 supported in this way has no plug 10 inserted, its contact terminal portion 13
The movable contact portions 12d of both wings of the contact piece 12b of the tip spring 12 are in pressure contact with a, and when the plug 10 is inserted, the tip causes the contact piece portion 12
b is pressed and the movable contact portion 12d moves to the contact terminal portion 13.
a, thereby realizing a switching function.

The jack of the present invention is constructed as described above, and when assembled, it can be inserted into the casing with the contact spring attached to the insulating base in advance, making it easy to assemble the contact spring and making contact with the casing. Since the support part of the spring is separate, it is easy to mold them and the manufacturing cost is low, and the contact spring is
Since it can be attached to the insulating base outside the casing, not only can it be tightly and firmly attached, but the movable contact part of the chip spring comes into pressure contact with the contact terminal part of the switching terminal piece and is compressed and deformed. Assembly work performed under stress is relatively easy, and work efficiency can be improved.Moreover, the opening of the casing is closed by an insulating base made by integrating the back plate and bottom plate, which are inserted and loaded from the back side. This prevents solder flakes from entering when connecting to a printed circuit board, making it possible to obtain a highly reliable product as a whole.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a longitudinal sectional view, and FIG. 2 is an exploded perspective view. 1...Casing, 3...Plug insertion hole, 4...
...Insulating base, 5...Bottom plate, 6...Back plate, 10
...Plug, 11...Sleeve spring, 11a...
Contact piece part, 12... Chip spring, 12d... Movable contact part, 13... Switching terminal piece, 13a...
...Contact terminal portion, 14...Support frame, 16...Support portion.

Claims (1)

[Scope of utility model registration request] A jack comprising a casing having a plug insertion hole on a front end surface, and a contact spring that contacts a plug inserted from the plug insertion hole into the casing, wherein the casing has an open part with an open bottom and back surface. A plug insertion guide having a shape and having the plug insertion hole is integrally protruded from the front end surface, and integrally includes a bottom plate and a back plate corresponding to the opening, and is inserted into the casing from the back side of the casing. The opening portion is closed by an insulating base that is inserted and loaded, and a sleeve spring is provided with a U-shaped contact piece portion whose inner surface contacts the outer periphery of the sleeve of the plug and clamps the sleeve when the plug is inserted. , the support frame is fitted into and supported by a support frame protruding from the upper surface of the front end of the bottom plate corresponding to the position of the plug insertion guide, and when the plug is removed, the tip of the plug is projected to the insertion position of the plug, and when the plug is inserted, the tip is inserted into the support frame. A chip spring having a movable contact portion at its tip that is pressed against the outer periphery and displaced is supported on the upper surface of the bottom plate, and the movable contact portion contacts when the plug is removed and is displaced when the plug is inserted. A jack characterized in that a switching terminal piece having contact terminal portions spaced apart from each other is supported by a support portion provided on the inner surface of the back plate.