JPH0134858Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a plug-in connector for a plug/outlet, a connector, a round fluorescent lamp socket, etc.

[Background technology]

Conventionally, the round fluorescent lamp socket shown in Fig. 6 and the
In plug connectors such as the plug shown in the figure and the connector shown in Figure 8, electrical connection is made by contact between conductive materials, but if the contact resistance increases or an overcurrent flows, the contact There was a risk of abnormal heat generation and loss of function or burnout.

[Purpose of invention]

The present invention has been made in view of the above-mentioned background, and an object of the present invention is to prevent the occurrence of accidents by interrupting the circuit when abnormal heat generation occurs.

[Disclosure of the invention] The plug connector according to the present invention is a plug connector in which a male terminal is inserted into a female terminal and electrically and mechanically connected to each other. A recess is provided in the surfaces facing each other in the connection direction when connecting at least one of the female terminal bodies, and the recess is stored in the recess in a shortened state at room temperature, and expands when abnormal heat is generated to connect at least the male and female terminals. A return body made of shape memory alloy that protrudes longer than the connection length of both terminals is installed, and the return body operates due to abnormal heat generation and mechanically separates the electrical connection, thereby preventing accidents from occurring. .

〔Example〕

1 to 3 show an embodiment of the present invention in a round fluorescent lamp socket, which will be described below with reference to the drawings.

Reference numeral 1 denotes a socket body made of thermosetting plastic, which is an insulating material, and formed into a substantially columnar shape, and a round fluorescent lamp cap 6 is formed through the socket from one end surface to the other end surface.
It has a lamp pin insertion opening 2, 2, 2, 2 into which four lamp pins protruding from the lamp are inserted, and a lamp pin receiving terminal connected to the tip of the lead wire 3, 3, 3, 3 is housed inside. ing. In addition, the end face of the socket body 1 facing the base 6 has a rectangular recess 4 between the lamp pin insertion holes 2, 2, and a rectangular recess 4 is provided in the recess 4, which maintains a shortened state at room temperature and when abnormal heat generation occurs. A return body 5 made of a shape memory alloy which becomes elongated due to high temperature is press-fitted and housed in the lower end.

This round fluorescent lamp socket is housed in a recess 4 of the socket body 1 in a shortened state under normal conditions, and when abnormal heat is generated, the return body made of a shape memory alloy expands due to the high temperature, and the lamp pin length of the base 6 is extended. It protrudes from the socket body 1 for a long time, thereby pushing the base 6 and breaking the electrical connection between the lamp pin and the lamp pin receiving terminal.

Figures 4 and 5 show another embodiment of the present invention, in which a cover body 7 is provided on the front surface of the socket body 1 so that the force from the return body 5 is uniformly applied to the cap 6, thereby preventing the lamp pin from being twisted. Easy to come off.

The shape of the return body 5 may be a plate spring shape as in the illustrated embodiment, or a coil spring shape. Further, the recess for housing the return body 5 can be easily provided if it is provided on the side of the round fluorescent lamp socket where the lamp pin receiving interval is wide, and the lamp pin can be removed reliably without prying when pushed out.

I have explained the round fluorescent lamp socket above.
Of course, connectors, plugs, etc. may also be used.

[Effect of idea]

As described above, according to the present invention, when abnormal heat generation occurs, the return body expands due to the high temperature and the electrical connection of the plug-in connector is cut off, thereby preventing accidents such as loss of function or burnout. can.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention, with Figure 1 being a perspective view, Figure 2 being a cross-sectional view of the main part in a usage state, and Figure 3 being a cross-sectional view of the main part in an operating state. It is. FIGS. 4 and 5 show other embodiments of the present invention, with FIG. 4 being an exploded perspective view and FIG. 5 being a sectional view of essential parts in an operating state. Figures 6 to 8
The figures are perspective views showing different conventional examples of the present invention. 1... Socket body, 2... Lamp pin insertion port, 3... Lead wire, 4... Recess, 5... Return body, 6... Base, 7... Storage body, 8... Lamp pin socket, 9... ...Guide piece, 10...Plug, 11
...Connector holder, 12...Connector.

Claims (1)

[Scope of utility model registration request] In a plug-in connector in which a male terminal is inserted into a female terminal and electrically and mechanically connected to each other, when connecting at least one of the male terminal body and the female terminal body, which are made of an insulator that accommodates the male terminal and female terminal, respectively. A recess is provided on surfaces facing each other in the connection direction, and the recess is made of a shape memory alloy that is stored in a shortened state at room temperature and expands when abnormal heat is generated to protrude at least longer than the connection length of both male and female terminals. A plug-in connector characterized by being provided with a return body.