JPH0532950Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to an audio jack.

(Prior art) In a conventional RCA jack, a grounding part protrudes from the tip of the jack, and a terminal hole is drilled in the axial center of this grounding part, and the pin of the plug is inserted into this terminal hole. A grounding metal fitting exposed on the plug tip surface surrounding this pin comes into contact with the grounding part.

(Problem to be solved by the invention) According to the conventional example, since the grounding part of the jack is exposed from the front end, it may come into contact with the wiring of surrounding equipment during or after connection with the plug, causing a short circuit. This could cause the equipment used to malfunction. Furthermore, the grounding fitting of the plug is only a few millimeters long, but because it is connected to the jack's grounding part in an exposed state, the same problem as above occurs after the jack and plug are connected. In particular, jacks used as relay portions of wiring used in car audio systems are susceptible to the above-mentioned short-circuit problem because they are embedded in the wiring that is tightly packed in a narrow space on the backside of a car dash board.

The purpose of the present invention is to make short circuits with the wiring of peripheral equipment less likely to occur during or after connecting the jack.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a cylindrical plug body made of an insulating material, a cylindrical grounding part fitted to the inner periphery of the plug body, and a plug body made of an insulating material. An acoustic jack that can be connected to a plug having a pin-shaped terminal located at the axial center of the main body and protruding from the tip surface, the jack body being made of an insulating material, and the jack body having a pin-shaped terminal protruding from the tip surface. a large-diameter hole extending inward and accommodating the plug body; a medium-diameter hole extending inward and continuous with the large-diameter hole; and a medium-diameter hole continuous with the medium-diameter hole. A small-diameter hole extending inward is formed concentrically with the medium-diameter hole, and the tip of the medium-diameter hole extends at least into the large-diameter hole, and a cylindrical ground of the plug is formed on the outer periphery of the plug. A cylindrical grounding part into which the pin-shaped terminal of the plug is fitted and fixed is fixedly provided in the small-diameter hole part, and a cylindrical terminal into which the pin-shaped terminal of the plug is fitted and fixed is fixedly provided. is fixedly installed.

(Function) When the plug is inserted into the jack, the pin-shaped terminal of the plug fits into the cylindrical terminal of the jack and is fixed, and the two are electrically connected, and the cylindrical ground part of the plug is connected to the jack. The cylindrical grounding part is fitted onto the outer periphery of the cylindrical grounding part within the large diameter hole of the jack, and the two are electrically connected.

(Example) Hereinafter, an audio jack according to an example of the present invention will be described based on the drawings.

In FIG. 1, a jack 1 is fitted and connected to a plug 6, and this plug 6 has a cylindrical plug body 7 made of synthetic resin. are fitted and fixed. The shaft center of this plug body 7 has a
A pin-shaped terminal 9 protruding from the distal end surface is fixed. On the other hand, the jack 1 has a jack body 2 made of synthetic resin, and this jack body 2 includes:
A large-diameter hole 3 extending inward from the tip surface and accommodating the plug body 7, a medium-diameter hole 3 extending inward continuously from the large-diameter hole 3, and A small-diameter hole extending inward and continuous with the hole is formed concentrically. This medium-diameter hole has a cylindrical grounding fitting 4 whose tip extends into the large-diameter hole 3.
is fixedly provided, and the cylindrical earthing fitting 8 of the plug 1 is fitted onto the outer periphery of this earthing fitting 4 and fixed. Further, a cylindrical terminal 5 into which the pin-shaped terminal 9 of the plug 1 is fitted and fixed is fixedly provided in the small diameter hole.

Note that the cylindrical earthing fitting 4 may be configured to protrude from the front end surface of the jack body 2.

(Effects of the invention) As described above, according to the invention, when a plug is inserted into a jack, the pin-shaped terminal of the plug fits and is fixed in the cylindrical terminal of the jack, and the two are electrically connected. At the same time, the cylindrical ground portion of the plug is fitted and fixed to the outer periphery of the cylindrical ground portion of the jack within the large diameter hole of the jack, thereby electrically connecting the two.

Therefore, when the plug is connected to the jack, the connection points of the two earth parts are located inside the large diameter hole and are covered by the jack body, making it less likely that a short circuit will occur due to contact between the earth parts and the wiring of peripheral devices, either during or after connection.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the state of use, and FIG. 2 is a partially cutaway front view. 1... Jack, 2... Jack body, 3...
Large diameter hole, 4... Tubular grounding part (earth metal fitting), 5... Tubular terminal, 6... Plug, 7...
Plug body, 8...cylindrical grounding part (earth metal fitting), 9... pin-shaped terminal.

Claims (1)

[Claims for Utility Model Registration] A cylindrical plug body made of an insulating material, a cylindrical grounding part fitted to the inner periphery of the plug body, and a cylindrical grounding part located at the axial center of the plug body and protruding from its tip surface. An acoustic jack connectable to a plug having a pin-shaped terminal, the jack body having a jack body made of an insulating material, the jack body having a large diameter that extends inward from the tip surface and accommodates the plug body. a hole of a medium diameter, a hole of a medium diameter that extends inward continuously from the hole of a large diameter, and a hole of a small diameter that extends inward and continues from the medium diameter hole are concentric. The medium-diameter hole has a cylindrical ground whose tip extends at least into the large-diameter hole and whose outer periphery is fitted with and fixed to the cylindrical ground portion of the plug. A cylindrical terminal, into which a pin-shaped terminal of the plug is fitted and fixed, is fixedly provided in the small diameter hole. Sound jack.