JPH03214559A - Structure of contact terminal - Google Patents

Abstract

PURPOSE:To prevent deformation of a plastic case and emission of smokes by using bi-metal to contact terminals of a dry cell, etc., separating a power feed solderless terminal circuit in case the terminal runs temperature due to shortcircuiting, etc., and thereby preventing temp. rise of the terminal furthermore. CONSTITUTION:A bi-metal 2 fitted with a dry cell solderless terminal is bent by heat before the heat of solderless terminal emitted due to excessive current in the event of failure for ex. shortcircuiting is transmitted to the bi-metal 2 to cause thermal deformation of the terminal mounting part 6 of a plastic case 4, and this bending acts so as to separate a coil 5 for solderless terminal from cell 1. This prevents further rise of the temp. of the terminal, which should preclude deformation at the terminal mounting part 6 of the plastic case 4 and emission of smokes.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a contact terminal that prevents the power output terminal of a dry battery of a power source of a radio cassette player or the like from emitting smoke or deforming in an abnormal state such as a short circuit.

[Conventional technology]

As described in Japanese Utility Model Publication No. 50-36676, conventional devices do not take into account the deformation of the mounting portion of the press-contact terminal when abnormal heat generation occurs.

[Problem to be solved by the invention]

Conventional technology does not take into consideration the fact that in the event of an abnormality such as a short circuit, an excessive current flows through the terminals and the terminals become abnormally heated, resulting in problems such as deformation of the plastic case due to heat or smoke generation. The purpose of the present invention is to provide a structure that prevents the case from deforming or generating smoke even if the temperature of the terminal rises in an abnormal situation, and prevents the temperature of the terminal from rising abnormally and prevents the case from deforming. It's about doing.

[Means for Solving the Problems] In order to achieve the above object, the present invention uses a bimetal as a terminal of a battery instead of a wire wound in a coil with stainless steel or piano wire. This prevents the terminal temperature from rising by immediately cutting off the circuit when the temperature rises. In addition, the contact pressure on the battery also applies force to the terminal attachment part of the case, but by using a bimetal and separating the terminal from the battery when the temperature rises, the force applied to the plastic case is removed and deformation occurs. ni<<shita. [Function] The bimetal to which the dry battery pressure contact terminal is attached will be able to absorb the heat generated by the pressure contact terminal due to excessive current in the event of an abnormality such as a short circuit, and transfer the heat from the pressure contact terminal to the bimetal. bends due to heat and moves to separate the pressure contact terminal from the battery.

This prevents the temperature from rising any further,
This prevents the attachment part of the plastic case from deforming or emitting smoke. [Example] An example of the present invention will be described below with reference to FIGS. 1 and 2. According to this embodiment, in the event of an abnormality such as a short circuit, the pressure contact terminal coil 5 generates heat, and this heat is transferred to the bimetal 2, but the bimetal 2 Bend as shown in Figure 2 and dry battery 1
and release the pressure contact terminal coil 5.

This suppresses the heat generation of the pressure contact terminal coil 5 and prevents the terminal attachment portion 6 of the molded case 4 from being deformed.

, [Effects of the Invention] According to the present invention, when a circuit abnormality occurs, the power is cut off due to the heat generated by the battery pressure contact terminal. This prevents the temperature of the terminal from rising any further, thereby preventing deformation of the plastic case and smoke generation.

Additionally, as the terminal temperature rises, the terminal can be separated from the battery, eliminating the force pressing it against the plastic case, which also has the effect of preventing deformation.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the initial installation state of an embodiment of the present invention. Fig. 2 is an explanatory diagram of the state in which the terminal heats up and the bimetal is bent during an abnormality. Fig. 3 is an explanatory diagram of the conventional terminal installation structure. It is.

Claims (1)

[Claims] 1. A contact terminal characterized in that a bimetal is used for the contact terminal of a dry battery, etc., and in the event of an abnormality such as a short circuit, the power supply pressure welding terminal circuit is disconnected even if the terminal heats up, before the plastic case deforms. structure.