JPH0512956Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a technology that prevents electronic circuits from malfunctioning due to current induced by external electromagnetic waves or static electricity when the terminal of a connector is opened. It is.

[Conventional technology]

Airbags are a device that protects occupants from the impact when a car crashes. This air bag will be briefly explained. An ignition device is attached to a loading chamber loaded with a gas generating agent that generates gas for inflating the air bag, and a signal line is attached to the ignition device. A battery as a power source and a collision sensor as a switch are connected to this signal line to form an air bag circuit. This circuit is divided into a power supply side and a device side by a connector interposed between the signal lines. When a car collides, a collision sensor detects the collision and sends an electrical signal to the ignition device, which ignites the gas generating agent and generates a large amount of gas, inflating the air bag and protecting the occupants from the impact of the collision. This air bag must operate at the moment of a collision, but conversely, it must be absolutely avoided that it operates at any time other than at the time of a collision.

When installing and inspecting this air bag, the connector that connects the signal line on the power supply side and the signal line on the load device side is disconnected, but at that time the terminal provided inside the connector halogen is left open. Become. In such a case, there may be another wire near the signal line on the equipment side, and a current may flow into it, or something charged with static electricity may come into contact with it, or the terminal on the equipment side may be exposed to electromagnetic waves from the outside. When the magnetic field or electric field is induced by this, a voltage is applied to the signal line primarily, and a voltage is generated between the signal lines depending on the strength or weakness of the influence of the magnetic field or electric field that each signal line receives, and the load Current flows primarily through the device. Even if the current that flows due to this is minute, the air bag is driven even by a minute current, which causes malfunction.

[Problem that the invention attempts to solve]

However, due to the structure of conventional connectors, the ends of each terminal are open when they are not mated, so when the above-mentioned current is induced, it all flows to the equipment side, causing the The drawback was that it was not possible to prevent malfunctions.

As a solution to this problem,
The invention described in No. 11482 has been proposed. this is,
Hot terminal fittings are provided on the back side of each of the plurality of insertion holes into which the pin jacks are inserted, and the hot terminal fittings are elastically connected to each other via a body. When the pin jack passes through the insertion holes, The tip of the pin jack pushes the hot terminal fittings to separate the hot terminal fittings from each other.

However, according to this conventional example, even if the pin jack is inserted into the insertion hole and electrically connected, the hot terminal fittings are still connected to each other, and in order to separate the connection between the hot terminal fittings, it is necessary to The pin jack must be pushed in further to make its tip protrude from the back of the insertion hole, which lengthens the stroke to disconnect and takes too much time. Further, even if the pin jack enters the insertion hole and becomes electrically connected, the hot terminal fittings can remain connected to each other, causing a short circuit accident.

This invention aims to solve the above problem.In order to prevent currents induced by external magnetic fields, electric fields, etc. from flowing into the equipment, multiple terminals are connected when the connector is not mated. A connector that maintains a short circuit and releases the short circuit when the connector is mated has a short stroke to release the short circuit, allowing mating to occur in a short time, and the short circuit can be automatically released once the connector is mated. The purpose is to provide a connector.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a plurality of terminals on either one of the male and female connector housings that are mated opposite each other, and the shorting plate facing each terminal is arranged in a direction perpendicular to the mating direction. A conductive leaf spring is provided at a distance from the terminal, one end of which is fixed to the tip of the terminal, and the other end of which is pressed against the shorting plate, and is provided along the connector fitting direction, and is provided on the other side of the male and female connector housings. The present invention is characterized in that when the mating terminal is fitted into the terminal, it comes into pressure contact with the leaf spring, and the leaf spring is separated from the shorting plate by the mating terminal.

〔Example〕

One embodiment of the present invention will be described using FIGS. 1 to 3. In the figure, A is a male connector housing connected to the equipment side, and B is a female connector housing on the power supply side that fits into this male connector housing.

The female terminal 1 is punched out of a conductive sheet metal by pressing, etc., and has a square cylindrical part 1a at one end as a contact part with the male terminal 9, which will become the mating terminal, and a wire crimped at the other end. The terminal is bent to have a portion 1b, so that the contact portion of the conventional terminal is less likely to deform and cause poor contact than in the case of a conventional terminal in which the contact portion is formed into a flat plate. This female terminal is accommodated in the terminal accommodation chamber 1' of the male connector housing A, and is engaged by the engagement projection 5 in the terminal accommodation chamber 1' fitting into the engagement hole 6 formed in the female terminal 1. be stopped.
A male terminal 9 serving as a mating terminal is housed in a terminal accommodating chamber 9' of the female connector housing B, and is locked by fitting the locking hole 12 and the locking protrusion 13 in the same manner as the female terminal.

Shorting plate housing chamber 3' in male connector housing A
A shorting plate 3 made of a conductive material is provided facing the female terminals 1, 1, and this shorting plate 3 is locked by a shorting plate locking projection 7. The shorting plate 3 faces each female terminal with a slight gap maintained therebetween.

Leaf springs 2, 2 are provided by bending the tip of the cylindrical portion 1a at the tip of the female terminal on the side opposite to the side facing the shorting plate 3, and the rear end 2' of the leaf spring 2 is attached to the female terminal. The intermediate portion of the short-circuiting plate 1 is elastically installed so as to come into pressure contact with the short-circuiting plate 3.

FIG. 2 shows a state in which the male and female connector housings are fitted, and FIG. 3 shows a state in which they are not fitted. The male terminal 9 is inserted into the female terminal 1 through a fitting hole 8 formed in the male connector housing A, and is pressed into contact with the leaf spring 2. The male terminal 9 is a square cylindrical contact portion 1a between the leaf spring 2 and the female terminal 1.
When the leaf spring 2 is clamped and fitted, the male terminal 9 pushes the leaf spring 2 downward in the figure, and the rear end 2' of the leaf spring and the shorting plate 3 are separated and the contact is broken. It's summery. 10 is a signal line on the device side, and 11 is a signal line on the power supply side.

As shown in FIG. 3, when the connectors are not fitted, the female terminals 1 and 1 on the device side are short-circuited by the leaf spring 2 and the shorting plate 3. Therefore, even if there are other electric wires or objects charged with static electricity near the signal lines 10, 10, no potential difference will occur between the female terminals 1, 1, and no induced current will flow in the device. This prevents malfunctions.

As shown in Fig. 2, when the connector is mated, the signal line 11 on the power supply side and the signal line 10 on the equipment side are connected, but as mentioned above, the leaf springs 2, 2 are separated from the shorting plate, so the female terminals 1, 1 The conduction between the two is cut off, preventing a short circuit from occurring if the device is energized.

When the connector is uncoupled when installing and inspecting the equipment, the terminals 1, 1 on the equipment side are immediately short-circuited by the shorting plate 3, and no induced current flows, allowing safe work.

It should be noted that the terminals may be of opposite sexes as in this embodiment. That is, the male terminal 9 in FIG. 1 becomes a female terminal having a cylindrical part, and the female terminal 1
It is sufficient if the terminal has a leaf spring.

Furthermore, the present invention is characterized in that it does not particularly require a ground wire, and furthermore, if the shorting plate 3 is removed, it can be used as a normal connector, providing versatility.

[Effect of idea]

As explained above, according to the present invention, in a connector that prevents current induced by the influence of an external magnetic field, electric field, etc. from flowing through a device, the stroke required to release a short circuit is short, and the fitting is completed in a short time. In addition, when the connectors are mated, the short circuit caused by the short circuit plate is automatically released to prevent short circuit accidents.
It has exceptional effects such as:

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a schematic configuration of a connector according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing the connector according to the present invention when mated, and FIG. 3 is a diagram showing the connector of FIG. FIG. 3 is a cross-sectional view showing a state where they are not aligned. A... Male connector housing, B... Female connector housing, 1... Male terminal, 2... Leaf spring, 3... Short circuit plate, 9... Male terminal.

Claims (1)

[Scope of utility model registration request] A plurality of terminals are provided on either one of the male and female connector housings that are mated facing each other, and a shorting plate facing each terminal is provided spaced apart from the terminal in a direction perpendicular to the mating direction, and one end of each terminal A conductive leaf spring fixed to the tip and having the other end pressed against the shorting plate is provided along the connector fitting direction, and when the mating terminal provided on the other side of the male and female connector housings is fitted to the terminal. A connector characterized in that the connector is configured to be in pressure contact with the leaf spring and to separate the leaf spring from the shorting plate by the mating terminal.