JPS6297216A - Contact detector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) This invention relates to a contact detection device, and more specifically, to a contact detection device, and more specifically, to detect a contact detection device that is dangerous when a moving body such as a vehicle approaches an object such as a structure by more than a predetermined distance. The present invention relates to a contact detection device used to detect, for example, that the

(Prior Art) Conventional contact detection devices include, for example, the widely known microswitch, JP-A-55-133709.
The sensing section is a tape-like switch, a tactile sensor using a semiconductor element, etc. as disclosed in Japanese Patent Application No. 54-40807, and the approach of the object is detected based on the object's contact with the sensing section. Devices that detect this are known.

[Problem to be solved]

However, all of these conventional techniques have major problems that need to be solved, especially in their sensing parts.

In other words, microswitches and tape-shaped switches have a movable contact structure, and the contact structure is made of a metal material, so when used outdoors or underwater, the contact oxidation, There is an extremely high risk of insulation failure.

Furthermore, as the structure of the microswitch becomes more milliliter, it becomes larger and has a rigid structure as a whole, so there is a risk that it will be damaged when it collides with an object.

On the other hand, a tape-shaped switch mainly detects contact by the action of the outer horn in a direction perpendicular to the sensing surface, so it is less sensitive to removal in a direction inclined to the sensing surface. For devices that use a lever tape-like switch, a tactile sensor, a cord-like pressurized conductive rubber switch, etc. as a sensing part and detect contact by fixing this sensing part to a sensing surface, when an object hits the sensing part, Since the contact is detected only after the object makes contact with the sensing surface, in other words, after the object has come very close to the sensing surface, the object and others may be damaged by the collision between the object and the sensing surface.

Therefore, by attaching a sensing part consisting of a tape-like switch, a tactile sensor, etc. to equipment via urethane foam, styrofoam, sponge rubber, or other shock absorbing material, we are trying to protect the object on the other side from impact damage. Although a proposal has been made, this proposed technique has another problem in that the structure of the detection device becomes complicated and large, and it also increases the number of man-hours and the cost of the device.

Means for Solving Problem C] In order to solve the above-mentioned problems, the present invention provides a support plate with a flat surface and a circular pressurized conductive rubber switch that is placed in contact with the surface of the support plate. a switch pressurizing part made of an elastic material that is placed in direct or indirect contact with the pressurized conductive rubber switch from the opposite hook side of the support plate; The present invention provides a contact detection device having a switch pressurizing body consisting of a rod-shaped contact portion extending at the central axis position of a pressurized conductive rubber switch.

(Function) Since the rod-shaped contact part is located at the center axis of the switch pressurizing part, the force applied to this contact part is applied in a direction perpendicular to or oblique to the axial direction.
Furthermore, even if a direct force is applied to the pressurizing part of the switch, the pressurized conductive rubber switch will be reliably activated.

Furthermore, since the switch pressure section is made of an elastic material, it will not be damaged even if force is applied to it directly or through the contact section.

〔Example〕

Detailed description of the invention with reference to the figures.

FIG. 1 shows a first embodiment of the invention. For example, on the upper surface of the support plate 1, which is made of metal and has a flat disk shape, a circular pressurizing switch 2 is placed in contact with the upper surface.

The pressurized conductive rubber switch is made by mixing and dispersing conductive particles such as metal particles and H-pump racks in rubber, as illustrated in FIG. 4 (a> or <b), and I>8.
A flexible electric conductor 4422 in the form of a braid or a bundle of many thin conductive linear bodies is attached on both sides of a flat band-shaped pressurized conductive rubber 21 that becomes conductive when pressed.
．． 22, the outside of which is covered with an elastic outer skin 23 made of synthetic rubber, for example, and can be molded into a desired shape such as the ring shape or rod shape used in the present invention.

A switch pressurizing part 31 of a switch pressurizing body 3 made of an elastic material such as synthetic rubber is baked and molded onto the support plate 1 so as to cover the pressurized conductive rubber switch 2 from above. The lower surface of is in contact with the pressurized conductive rubber switch 2.

Above the switch pressure section 31, a contact section 32 on a bar is integrally formed and protruded with the pressure section 31;
The center axis of the circular pressure conductive rubber switch 2 extends from the 0th position to the 4th position.

FIG. 2 shows another embodiment of the invention, in which the contact portion 42 of the switch pressurizing body 4 is made of, for example, stainless steel, or a metal material with anti-rust treatment, or other material. Made, switch pressurization part 4
The embodiment is completely the same as the embodiment shown in FIG. 1, except that it is insert molded in FIG.

FIG. 3 shows yet another embodiment of the present invention, in which a switch made of, for example, hard plastic is used between the switch pressurizing portion 37 of the switch pressurizing body 3 and the pressurized conductive rubber switch 2. A protection member 5 is provided. This protective member 5 protects the pressurized 2# electric rubber switch 2 from high heat during the molding of the switch pressurizing part 31, and evenly distributes the force applied to the contact part 32 to the pressurized conductive rubber switch 2. It also plays the role of a pressure equalizing plate that conveys the information.

Next, the operation of the contact detection device of the present invention will be explained with reference to FIG.

If a force P1 is applied to the contact portion 32 of the switch pressurizing body 3 from the side, the reaction force R1 of the supporting plate 1 will generate a moment R+ ・r equal to the moment P+J2 around the zero point. (b) Figure A-Al
Pressurized conductive rubber switch 2 acts from the top surface of the right half of l.
excite.

Furthermore, when a force P2 is applied from directly above the switch pressurizing body 3, that is, from a direction perpendicular to the support plate 1, a reaction force R2 directed directly upward from the top surface of the support plate 1 is applied to the entire pressurized conductive rubber switch 2. It acts over the circumference, and at this time as well, the four-pressure electric rubber switch 2 is reliably excited.

A force P3 acts on the switch pressurizing body 3 from an oblique direction.
When this happens, it can be considered by decomposing it into a force from directly above with a magnitude of p 3 cosθ and a horn from directly on the side with a magnitude of P 3 sinθ, and the moment due to these forces or forces, respectively. A counterforce or moment is generated by the reaction force R3 from the support plate 1, and this /JR3 reliably excites the pressurized conductive rubber switch 2.

With the above in mind, the pressurized conductive rubber switch 2 is reliably excited and turned ON by any force applied to the contact portion 32 of the switch pressurizing body 3 from any direction.

For this reason, although not shown, if the flexible electrodes 22 and 22 are connected to an appropriate alarm device via lead wires, for example, when the switch pressurizing body 3 contacts an object and pressurizes it, It is extremely easy to activate this alarm device and issue an alarm.

In addition, the switch pressurizing part 31 (4) of the switch pressurizing body 3 (4)
1) is made of an elastic material, so if a force is applied to the contact portion 32 (42) from any direction, the switch applying portion 31 (41) deforms and bends, causing the switch pressurizing body 3 ( 4) Otherwise, the pressurized conductive rubber switch 2 and the like will not be damaged.

In the case of the embodiment shown in FIG. 1, the contact portion 32 itself can also be elastically deformed.

The contact detection device of the present invention is useful when attached to a car 7, for example, as shown in FIG. 6, and when backing into a garage 6. In other words, even if the contact portion 32 of the switch pressurizing body 3 of the detection device touches any part of the entrance of the car Ji 6, the contact can be immediately detected via, for example, an alarm installed inside the car. .

〔effect〕

According to this invention, ■Since the rod-shaped contact part of the switch pressurizing part is located at the center axis of the pressurized conductive rubber switch, the horn applied to this contact part has a length that is in the axial direction and perpendicular to the axial direction. Even when force is applied in the direction or diagonal direction, or when force is applied directly to the pressurized part of the switch, you can reliably create a pressurized conductive rubber switch! IJ Sazeru,
In addition, (1) the switch pressure section is made of an elastic material, so it has the advantage that it will not be damaged even if force is applied to it directly or through the contact section.

[Brief explanation of drawings]

1 to 3 are side sectional views showing different embodiments of the present invention, FIGS. 4(a) and (6) are sectional views illustrating a pressurized conductive rubber switch, and FIG. 5(a> , (b) is a schematic diagram for explaining the effect of force on the contact detection device of the present invention, and FIG. 6 is a plan view illustrating the case where the device of the present invention is attached to an automobile. 1.・Support plate, 2... Pressurized conductive rubber switch, 3.4...
...Switch pressure body, 31.41...Switch pressure section, 32.42.
...Contact part, 5...Protection member. Applicant Brides Co., Ltd. Agent Patent Attorney Masu Izuru 1/1 Large quantity 1 diagram @21!1

Claims (1)

[Claims] 1. (a) a support plate with a flat surface; (b) a circular pressurized conductive rubber switch placed in contact with the surface of the support plate; and (c) the pressurized conductive rubber switch. a switch pressurizing part made of an elastic material that is placed in direct or indirect contact with the rubber switch from the side opposite to the support plate; and a center axis position of the annular pressurized conductive rubber switch that is fixed to the switch pressurizing part. A contact detection device having a switch pressurizing body consisting of a rod-shaped contact portion extending in the direction of the contact portion. 2. The contact detection device according to claim 1, wherein the switch pressure section and the contact section are integrally formed of the same material. 3. The contact detection device according to claim 1, wherein a protective member is interposed between the switch pressurizing body and the pressurized conductive rubber switch.