WO2012024825A1

WO2012024825A1 - Rubber strip

Info

Publication number: WO2012024825A1
Application number: PCT/CN2010/001935
Authority: WO
Inventors: 孔庆满
Original assignee: 宁波市鄞州享通智能门控有限公司
Priority date: 2010-08-25
Filing date: 2010-12-07
Publication date: 2012-03-01
Also published as: CN201794481U

Abstract

A rubber strip comprises an insulating elatsic body (1) in which a longitudinal through hole (11) is disposed. The inner wall of said longitudinal through hole (11) is provided with two longitudinal conductive strips (12) which are spaced apart from each other in natural state, but come into contact with each other to form an electrical connection in the squashed state of said insulating elatsic body (1) by an external force. Compared with the prior art, said rubber strip has advantages as follows: 1. a finished product is easy to manufacture. The one-piece finished product is formed by directly fabricating the conductive strips into the rubber strip rather than inserting a small tube into a large tube, and can be put into service after being directly cut in accordance with preset dimensions; 2. no failure appears when manufacturing the product to be finished. Without inserting the small tube into the large tube or pulling, no short circuit as a result of stretching happens when manufacturing; 3. owing to the one-piece design, the present invention eliminates an original silicon-rubber-tube pressure sensor and thus lowers the cost.

Description

Rubber strip

Technical field

The invention relates to a rubber strip. Background technique

Existing electric doors, automatic induction doors, automatic revolving doors, garage doors, industrial doors, commercial doors, electric shutter windows, car doors, subway doors and other mechanical and public safety occasions, most require the use of rubber strips and pressure sensors. The working principle is that different kinds of rubber are installed according to actual requirements in the contact parts of the above various electric door, automatic induction door, automatic revolving door, garage door, industrial door, commercial door, electric shutter window, automobile door and subway door. On the one hand, the rubber strip acts as a seal and shock absorber. On the other hand, it is used together with the pressure sensor to open and close the electric force. The pressure sensor is placed in the longitudinal through hole of the rubber strip. The rubber strip and the pressure in the natural state. The sensor is not subjected to a backlog of external force. The two conductive strips in the pressure sensor are electrically separated from each other. When the rubber strip and the pressure sensor are pressed by the external force, the two conductive strips in the pressure sensor are electrically connected to each other. , thus achieving power-on.

The existing pressure sensors generally use a silicone tube, which has the following disadvantages:

1. The production is difficult. In the production, a batch of materials fails when it encounters mechanical or extrusion traction. Once the time is delayed, the chemical reaction of the batch materials will be scrapped.

2, high cost: silica gel, conductive wire, conductive strips, bonded glue cost is high.

3. Sensitivity deviation: The pressure sensor (silicone tube) needs to be worn inside the rubber strip. The external external external pressing force is not sensitive to the pressure sensor.

Moreover, when the existing rubber strip is used in combination with a pressure sensor, the following disadvantages also exist:

1. Production cost: The pressure sensor (silicone tube) is very difficult to wear when it is worn inside the rubber strip. Since both products are rubber products, their mutual friction coefficient increases. It is laborious and easy to pull when it is produced.

2, the finished product is prone to failure: When the pressure sensor (silicone tube) is worn inside the rubber strip, the friction between the two objects is very large, and usually cannot be directly passed through, all of which are pulled by the steel wire, and the traction is caused by improper force, resulting in the pressure sensor. The conductive rubber strip in the (silicone tube) is loose or separated from the conductive wire, and it is also easy to cause a short circuit caused by an increase in the length of the pressure sensor (silicone tube).

3. High cost: Most of the raw materials for pressure sensor production are imported silica gel. Because of the tensile and temperature resistance, the two wires are imported DuPont wire, and the glue that adheres to the conductive rubber strip depends on the imported.

4. Poor sensitivity: Because the pressure sensor (silicone tube) itself is made of silicone rubber, it is made into an elliptical shape, and it is worn inside the rubber strip. The high-pressure extrusion reaction is sensitive, and the small-force extrusion is sometimes insensitive. Summary of the invention

The technical problem to be solved by the present invention is to provide a rubber strip which is less prone to failure, simple to manufacture, and low in cost when manufacturing a finished product.

The technical solution adopted by the present invention is as follows: the rubber strip includes an insulating elastic body, and the insulating elastic body is provided with a longitudinal through hole, wherein: the inner wall of the longitudinal through hole is longitudinally distributed. And two conductive strips which are separated from each other in a natural state and are electrically connected to each other in a state in which the insulating elastic body is pressed by an external force.

The conductive strip may be a conductive rubber strip, and in order to enhance the mechanical strength and tensile strength of the two conductive rubber strips, the problem that the two conductive rubber strips are caused by the increase in length due to the increase in length leads to a decrease in trigger sensitivity. At least one conductive wire is embedded in the middle of the root conductive rubber strip.

The conductive strip may also be a conductive copper ribbon woven from copper wire, and the conductive copper ribbon is directly attached to the inner wall of the longitudinal through hole.

Preferably, the two conductive strips are symmetrically disposed along the inner wall of the longitudinal through hole.

The advantages of the present invention over the prior art are:

1. The finished rubber strip is simple to make: The conductive strip is directly made into the rubber strip to form an integrated product. When the finished product is produced, no large tube small tube is needed, and it can be used only by cutting the size directly.

2, there will be no failure when making the finished product: Because there is no need for a large tube sleeve and no traction, the production will not appear short circuit due to stretching.

3. Due to the integrated design, the original pressure sensor (silicone tube) is omitted, which reduces the cost. DRAWINGS

1 is a schematic perspective view of a rubber strip according to a first embodiment of the present invention;

2 is a schematic cross-sectional view showing a rubber strip in the first embodiment of the present invention;

3 is a schematic perspective view of a rubber strip in a second embodiment of the present invention;

4 is a schematic cross-sectional view showing a rubber strip according to a second embodiment of the present invention;

Figure 5 is a perspective view showing the three-dimensional structure of a rubber strip according to a third embodiment of the present invention;

Figure 6 is a schematic cross-sectional view showing a rubber strip in the third embodiment of the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings.

Embodiment 1:

The rubber strip shown in FIG. 1 and FIG. 2 includes an insulating elastic body 1 . The upper portion of the elastic body 1 is provided with a positioning clip 13 , and the positioning clip 13 is disposed at an upper portion of the edge elastic body 1 . Insulating elastic body A longitudinal through hole 11 is disposed therein, and the inner wall of the longitudinal through hole 11 is provided with two conductive strips 12 which are longitudinally distributed and are apart from each other in a natural state, and are electrically connected to each other when the insulating elastic body is pressed by an external force. .

In this embodiment, the two conductive strips 12 are electrically conductive copper ribbons woven from copper wires, and the conductive copper ribbons are directly attached to the inner wall of the longitudinal through holes 11, and the two conductive copper ribbons are along the same The inner wall of the longitudinal through hole 11 is symmetrically arranged. Embodiment 2:

Different from the first embodiment, the insulating elastic body 1 of the rubber strip has different specifications, and the positioning strip 13 has a T-shape and is vertically disposed at the upper portion of the edge elastic body 1. Embodiment 3:

Different from the first embodiment, the two conductive strips 12 are conductive rubber strips, and four conductive wires 14 are respectively embedded in the middle of the two conductive rubber strips. The manufacturing process of the above rubber strip includes the following steps -

(1) applying an adhesive to the conductive wire 14;

(2) placing the adhesive-coated conductive wire 14 in an incubator for dehumidification treatment;

(3) Putting conductive rubber strip material into the rubber mixing machine, adding conductive powder with white titanium powder and platinum fluidizing agent in a certain proportion. When the conductive adhesive reaches a certain viscosity, the conductive adhesive and dehumidification are performed in the extruder. The conductive wire 14 is composited to form the conductive strip 12, and the conductive strip 12 is steamed;

(4) placing the steamed conductive strip 12 in an incubator for dehumidification treatment;

(5) Put the insulating silica gel raw material into the rubber mixing machine, add the white titanium powder and the platinum liquid fluidizing agent to make the insulating rubber in a certain proportion. When the insulating rubber reaches a certain viscosity, the insulating rubber and the dehumidified in the extruder The conductive strip 12 is composited, and then the insulating elastic body 1 compounded with the conductive strip 12 is steamed;

(6) The steamed rubber strip is then cooled and shaped through a room temperature water tank.

Wherein the temperature of the incubator in steps (2) and (4) is 120 ° C, the dehumidification time is 2 hours; and the temperature of steaming in steps (3) and (5) is 250 ° C, the traction speed of the extruder It is 800 rpm.

Claims

Rights request

A rubber strip comprising an insulating elastic body (1), wherein the insulating elastic body (1) is provided with a longitudinal through hole (11), wherein: the inner wall of the longitudinal through hole (11) is longitudinally distributed And two conductive strips (12) which are separated from each other in a natural state and are electrically connected to each other in a state in which the insulating elastic body (1) is pressed by an external force.

The rubber strip according to claim 1, wherein the conductive strip (12) is a conductive rubber strip, and at least one conductive line is respectively embedded in the middle of the two conductive rubber strips.

3. The rubber strip according to claim 1, wherein: the conductive strip (12) is a conductive copper ribbon woven from copper wire, and the conductive copper ribbon is directly attached to the longitudinal through hole (11) ) on the inner wall.

The rubber strip according to claim 1 or 2 or 3, characterized in that the two conductive strips (12) are symmetrically arranged along the inner wall of the longitudinal through hole (11).