JPH0119341Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a plug adapter that is used by being interposed between an outlet and a plug when connecting a round rod type plug to a blade-receiving type outlet.

Conventionally, this type of plug adapter has an insulating housing, an insulating base is fitted into the opening of the insulating housing, and a plug is attached to the surface of the insulating base to protrude outside the housing, and the plug is brought into contact with the insulating base. It was common for a contactor to be housed in a housing to be attached to the back side of an insulating stand. (For example, Utility Model Publication No. 53-23575) However, in this type of conventional adapter, it is necessary to manufacture the insulating stand and the insulating housing using separate molds, and in addition, the contactor inside the housing and the plug protruding outside the housing are required. Moreover, since screws are also used to connect the insulating stand and the housing, the number of parts is large, and many assembly processes are required, resulting in high costs.

In view of the above-mentioned drawbacks of the conventional technology, the present invention aims to make parts uniform in shape, thereby reducing the number of necessary parts, making assembly easier, and making it difficult to disassemble.
The purpose is to improve safety by preventing live wires from being easily exposed during use, and the main structure is to join a pair of halves formed in a half-shape. The insulating housing has an insulating housing, and a contact integrally having a fork-type connector part for holding a round rod-shaped plug at one end of a plate and a blade-shaped plug part at the other end, and the insulating housing has one end face. A fork-shaped contact is provided with a round rod plug insertion/removal hole formed to extend between the two halves, and the fork type contact is configured to be capable of holding a round rod plug inserted into the round rod plug insertion/removal hole within the insulating housing. The connector part is accommodated, and the blade-shaped plug part of the contact is made to protrude outside the insulating housing, and the two halves have engaging protrusions protruding from the joint surfaces of the two halves, and the engaging protrusions of the other half engage with each other. the engaging hole and the engaging protrusion are provided in pairs in symmetrical positions close to the edge of the contact insertion hole and the edge on the opposite side for each half; The engagement hole consists of a window hole formed through each half body, and a locking step protruding from the inner circumferential surface of the window hole, and the base of the engagement protrusion is integral with each half body. Consisting of a molded spring piece and a locking hook formed at the tip of the spring piece,
The adapter for an insertion plug is characterized in that the locking hook portion is locked to the surface side of the insulating housing of the window hole to prevent the locking stepped portion from coming off.

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

This plug consists of an insulating housing 1 and a pair of contacts 2. Insulation housing 1
is constructed by joining together a pair of halves 1A and 1B made of synthetic resin.
A pair of round rod plug insertion/removal holes 3 formed across both halves 1A and 1B are opened at one end.

Further, two pairs of engaging protrusions 4 that form pairs with each other and two pairs of engaging holes 5 into which the engaging protrusions 4 of the other half are engaged are formed on the joint surfaces of both halves 1A and 1B. The engaging protrusion 4 and the engaging hole 5 form a pair, and each half has a round bar plug insertion/removal hole 3.
They are formed in pairs close to the edge of the side and the edge of the opposite side, and are formed in positions symmetrical to each other with respect to the center line so that both halves 1A and 1B have the same shape. .

Further, the engagement protrusion 4 is composed of a spring piece 4A and a hook 4B integrally formed at its tip, and the base of the spring piece 4A is integrally connected to the half body 1A or 1B, and the engagement hole 5 has a window hole opened through the front and back sides of the half body 1A or 1B, and a locking step portion 5A is protruded from the inner surface of this window hole. Then, the hook portion 4B of the engagement protrusion 4 of one body 1A or 1B is attached to the outer surface of the housing of the locking step portion 5A in the engagement hole 5 of the other half body 1B or 1A due to the elasticity of the spring piece portion 4A. It is locked and prevented from falling out,
As a result, both halves 1A and 1B are joined together inseparably.

On the other hand, the contact 2 is formed from a single conductive metal plate, and integrally has a fork-type connector part 2A that can freely hold a round rod plug at one end, and a blade-type plug part 2B at the other end. The fork-type connector part 2A is housed in the deep part of the round-bar plug insertion/removal hole 3 of the insulating housing 1, and the ends of the inserted round-bar plug are held on both sides to enable electrical connection.
A blade-shaped plug portion 2B at the other end protrudes from the end of the insulating housing 1.

The plug adapter constructed in this way is made by molding a large number of halves 1A or 1B of the same shape and stamping a large number of connectors 2 of the same shape, and inserts a pair of halves 1A and 1B between the pair of halves 1A and 1B. It is assembled by fitting the connectors 2 and joining the two halves.

In addition, when using it, insert the blade-shaped plug part 2B protruding from the insulating housing 1 into the blade-shaped outlet, insert the round-bar plug into the round-bar plug insertion/removal hole 3 on the back side, and insert the round-bar plug into the blade-shaped outlet. Connect the plug.

The plug adapter of the present invention is constructed as described above, and includes a single contact, one end of which is housed in an insulating housing, holds a round bar plug, and has the other end protruding to be inserted into a blade socket. It has a plate-like shape with a fork-type connector part integrally molded at one end, which significantly reduces the manufacturing cost compared to conventional methods in which the plug receiving part and the plug part were formed separately and combined. and their assembly is simplified, and since the insulating housing is made by joining a pair of halves of the same shape, the entire housing is made up of one type of housing part, and its manufacture is significantly simplified. At the same time, the engagement protrusion and the engagement hole have a structure that locks the hook and the step, so they do not come off easily, and the engagement hole is opened through the half body, and the inner surface of the step is attached to the housing surface side of the step. By engaging the hook portion of the engagement protrusion, the engagement can be released using a jig.
Even if an incorrect assembly occurs, it can be corrected, and since both halves are connected to each other by a total of four engaging projections, two from one side, it is not possible to uncouple the two halves from only one side. This is impossible, and the live wires are not exposed during use, resulting in increased safety.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention; Fig. 1 is a front view, Fig. 2 is a top view, Fig. 3 is a bottom view, Fig. 4 is a right side view, and Fig. 5 is a cross-sectional view of Fig. 1. - An X-line cross-sectional view; FIG. 6 is a Y--Y cross-sectional view of FIG. 2; 1...Insulating housing, 1A, 1B...Half,
2...Contact, 2A...Fork type connector part, 2B...Blade type plug part, 3...Round bar plug insertion/removal hole, 4...Engaging protrusion, 4A...Spring piece part, 4B
...Hook portion, 5...Engagement hole, 5A...Locking stepped portion.

Claims (1)

[Scope of utility model registration request] An insulating housing made by joining a pair of halves formed in a half-shape, a fork-type connector part that holds a round rod-shaped plug at one end of a single plate, and a blade-shaped plug part at the other end. The insulating housing has a round bar plug insertion/removal hole formed on one end surface extending between the two halves, and the round rod plug is inserted into the round rod plug insertion/removal hole in the insulating housing. The fork-shaped connector portion of the contact is accommodated so as to be able to freely hold a round rod-shaped plug, and the blade-shaped plug portion of the contact is made to protrude outside the insulating housing. An engagement protrusion and an engagement hole to which the engagement protrusion of the other half is engaged; The engagement holes include a window hole formed through each half and a locking step protruding from the inner circumferential surface of the window hole. The engaging protrusion consists of a spring piece whose base is integrally formed with each half, and a locking hook formed at the tip of the spring piece, and the engaging protrusion has a window with respect to the locking step. An adapter for an insertion plug characterized in that the locking hook portion is locked on the surface side of the insulating housing of the hole to prevent it from coming off.