JPH0441536Y2 - - Google Patents

Description

[Detailed explanation of the idea] "Industrial application field" The present invention relates to an improvement of a motion detection switch.

"Conventional technology" As a conventional motion detection switch, for example,
There is something like the picture.

As shown in the figure, one terminal consists of a main body 1 that fits into the vehicle body, a resin pusher 2 that is inserted into the main body 1 so that it can move forward and backward, and a screw at the tail end of the pusher 2. It consists of the other fixed terminal 3 and a spring 4 that always urges the pusher 3 forward, and the resin pusher 2 also serves as an insulator for both terminals.

Since the terminal 3 is fixed to the tail end of the pusher 2 that moves forward and backward as the door is opened and closed as described above, the lead wire L connected to this terminal 3 is attached to the pusher 2.
It moves along with the progress and retreat of the

``Problems that the invention seeks to solve'' However, with such conventional technology, when a motion detection switch is used as a motion detection switch, it is usually installed in an extremely narrow space near the vehicle door. If the lead wire of the motion detection switch moves every time the door is opened or closed, there is a risk of it coming into contact with the vehicle body or other parts. This caused tension in the lead wires, resulting in strained operation and the risk of the outer sheath being worn out or failure to conduct electricity.

The present invention was developed by focusing on these conventional problems, and aims to provide a motion detection switch in which the terminal member does not move even if the presser moves, and the lead wire does not move. The purpose is

"Means for Solving the Problem" The gist of the present invention to achieve this purpose is to: In a motion detection switch that is normally conductive and becomes non-conductive when the object to be detected presses the presser, A conductive base member that is attached to the vehicle body, a terminal member that is fixed to this base member via an insulator and to which a lead wire is connected, and a terminal member that is attached to the base member so that it can move forward and backward and is electrically connected to the base member. The pusher is biased so that the tip of the pusher always protrudes outward from the base member so that it can come into contact with the detection target, and the pusher is pushed by the tail end of the pusher. The present invention is directed to a motion detection switch characterized in that a contact portion is provided which is separated from the terminal member when the terminal member is moved, and is normally electrically connected by elastically abutting the terminal member.

``Operation'' The base member is attached near the door of the vehicle body, and the lead wire is placed on the terminal member to complete the installation.

In the detection state, the contact portion at the tail end of the presser comes into elastic contact with the terminal member, and the base member and the terminal member are electrically connected. In the non-detection state, the pusher is pushed and retreats against the urging force, and the contact portion comes off from the terminal member, cutting off electrical continuity.

Since the terminal member is fixed to a base member fixed to the vehicle body via an insulator, the lead wires installed in this terminal member will not move even if the pusher moves with the switch operation. do not have. Therefore, even if this motion detection switch is installed in a narrow area, the lead wire will not move even if it touches other members, so there is no risk of abrasion of the outer cover and no malfunction.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

1 to 3 show an embodiment of the present invention.

The motion detection switch 10 includes a U-shaped metal base member 11, a cylindrical presser 12 fitted into the base member so as to be able to move forward and backward, and the base member 11 is fixedly connected to the base member 11 through an insulator 15. The contact member 14 is caulked to the tail end 12b of the pusher 12, and the spring 16 urges the pusher 12 forward.

The presser 12 is made of metal and is in slidable contact with the base member 11, so that they are electrically connected, and the spring 16 is connected to the stepped portion 12c between the base member 11 and the presser 12. Since the base member 11 and the presser 12 are interposed between the base member 11 and the presser 12, the electrical connection between the base member 11 and the presser 12 is sufficient from this point of view as well.

The insulator 15 is made of, for example, phenol resin, which has good insulation properties and can be injection molded.As shown in FIG. It is integrally molded.

The presser 12 passes through the side plate 11b of the base member 11 and also passes through the terminal member 13, but does not come into contact with the terminal member 13 as shown in FIGS. 2 and 3.

The contact member 14 is made of a copper-based material, has a U-shape, and is caulked to the tail end 12b of the presser 12. The tip end contacting the terminal member 13 is slightly sharpened to ensure good electrical connection.

The base member 11 is provided with a small hole 11a for attachment.

Next, the action will be explained.

The motion detection switch 10 is attached to a predetermined position near the door of the vehicle using screws or the like. To prevent significant lateral force from being applied to the pusher 12 when opening and closing the door. The lead wire L is connected to the terminal member 13, and the protective cover P is applied to the wire end to complete the installation.

When the pusher is not pressed by the door, the tip 12a of the pusher 12 is pressed as shown in FIG.
protrudes significantly outward from the base member 11,
The contact member 14 at the tail end 12b is in contact with the terminal member 13. That is, the terminal member 13 and the base member 1
1 is electrically connected via a contact member 14 and a presser 12.

When the pusher 12 is pushed back by the door, the contact member 14 also moves back at the same time, as shown in the chain diagram in FIG. 1, and the electrical connection between the terminal member 13 and the base member 11 is broken.

When the pressing force from the door is removed, the pusher 12 is moved forward by the spring 16, the contact member 14 comes into contact with the terminal member 13 again, and the electrical connection between the terminal member 13 and the base member 11 is restored.

"Effect of the invention" According to the motion detection switch according to the invention, since the terminal member is made immovable regardless of the movement of the presser,
The lead wire connected to the terminal member does not move,
There is no risk of damage to the outer casing due to friction with other parts of the vehicle and failure of electricity due to this.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention, in which Figure 1 is a plan view of a motion detection switch, Figure 2 is a vertical sectional view, Figure 3 is a front view, and Figure 4 is a conventional motion detection switch. FIG. 3 is a vertical cross-sectional view of the switch. DESCRIPTION OF SYMBOLS 10... Motion detection switch, 11... Base member, 12... Presser, 13... Terminal member, 14...
... Contact member, 15 ... Insulator, 16 ... Spring, L
……Lead.

Claims (1)

[Scope of Claim for Utility Model Registration] A motion detection switch that is normally conductive but becomes non-conductive when the object to be detected presses the presser includes a base member of a conductor attached to the vehicle body and an insulating material on this base member. The terminal member is fixed through the terminal member to which a lead wire is connected, and the pusher is attached to the base member so as to be movable and retractable and is electrically connected to the base member. It protrudes outward to bias the detection target so that it can come into contact with it, and at the tail end of the presser, it separates from the terminal member when the presser is pressed, and normally stays elastically attached to the terminal member. A motion detection switch characterized by having a contact portion that comes into contact and conducts electricity.