JP2002075117A - Cord switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cord switch, where workability in fitting of an opening/ closing device to an opening/closing part is improved by settling difficulty in inserting a cord switch body into a rubber cover. SOLUTION: The cord switch is provided, which has the cylindrical insulating part 12 formed from an elastic insulating body, a cord switch body 10 having a plurality of rod-like conductive parts 11, formed of a conductor, so as to face each other in the length direction, on the inside surface of the insulating part 12, and a rubber cover 20 capped over the cord switch body 10. Here, the cord switch body 10 is formed into a conical form, in cross section, while the rubber cover 20 is formed into an annular form in cross section. A coat layer 15 is formed between the cord switch body 10 and the rubber cover 20, whose friction coefficient is smaller than that between the insulating part 12 and the rubber cover 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cord switch which operates when pressed, and more particularly to a cord switch which is attached to an opening / closing portion of an opening / closing device such as a door, a window or a shutter having an automatic opening / closing function.

[0002]

2. Description of the Related Art Opening and closing devices such as doors, windows and shutters having an automatic opening and closing function are widely used in many buildings such as buildings, shops, garages and automobiles.

[0003] Accordingly, there is a concern that a pinch accident may occur. For this reason, it has been studied to attach switches to the opening / closing section of the switchgear as an accident prevention measure.

Conventionally, as a switch used for such a purpose, for example, a cord switch operated by pressing is known.

As the cord switch, there are a square cord switch and a round cord switch as shown in FIG. Further, the round type includes a type having two electrodes and a type having four electrodes as shown in FIG.

[0006] As shown in FIG. 4, rectangular type of cord switch, and an insulating portion 2 formed in the cylindrical elastic insulator having an air gap h ₁ in cross section in the center insulated rectangular, the insulating portion 2 And a conductive portion (electrode) 1 formed of two rod-shaped conductors provided in the longitudinal direction on the opposing inner surfaces.

The cord switch body 3 is intended to protect or support and fix the cord switch body 3 so that the cord switch body 3 is not damaged when attached to the opening / closing portion of the opening / closing device, and absorbs the impact of opening / closing of the opening / closing portion. It is used by being put in the rubber cover 4.

Further, as shown in FIG.
This type of cord switch includes an insulating portion 6 formed in the cylindrical elastic insulator having an air gap h ₂ in cross-section in the center is substantially square shaped insulating, spiral and parallel curves on the inner surface of the insulating part 6 Similarly, a cord switch body 7 composed of a conductive portion (electrode) 5 formed of four rod-shaped conductors provided in a shape is inserted into a rubber cover 8.

[0009] The rubber cover 4,
Numeral 8 is formed of a cylindrical elastic body having accommodating holes of substantially the same shape formed in accordance with the outer shape of each of the cord switch bodies 3 and 7.

[0010] These cord switches are attached to the lower end of the opening / closing unit of an opening / closing device such as a shutter. When something is pinched while the opening / closing unit is descending, the insulating unit 2 is pressed in a light pressurizing step before being strongly pinched. , 6 are deformed so that the opposing conductive portions 1 and 5 are brought into contact with each other and the conductive portions 1 and 5 are electrically connected to each other, thereby outputting a detection signal for stopping the lowering of the opening / closing portion.

[0011]

By the way, these insulating parts 2, 6 and conductive parts 1, 5 have a point that the operating sensitivity has little temperature dependency, a point that the resistance is low, and a point that the resistance value does not change with time. EP rubber is used as a material of the insulating portions 2 and 6 because of its good insulating properties and relatively low price.

However, since the EP rubber has poor slipperiness and a high coefficient of friction between the rubber covers 4 and 8, the cord switch bodies 3 and 7 are inserted into the rubber covers 4 and 8 as described above. When the rubber covers 4 and 8 are not straight but curved, or the diameter of the receiving holes of the rubber covers 4 and 8 is equal to the diameter of the cord switch bodies 3 and 7 It is even more difficult to insert the cord switch, and in some cases, the cord switch bodies 3 and 7 may be damaged when inserted.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cord switch which can eliminate the difficulty in inserting the cord switch body into the rubber cover and can improve the workability of attaching the cord switch body to the opening / closing portion of the opening / closing device. .

[0014]

In order to solve the above-mentioned problems, the present invention is directed to a cylindrical insulating portion formed of an elastic insulator, and an inner surface of the insulating portion formed of a conductor. In a code switch including a code switch body having a plurality of rod-shaped conductive portions provided in a longitudinal direction and opposed to each other, and a rubber cover covered on the code switch body, the code switch body has a circular cross-sectional shape. And forming the rubber cover into an annular cross-sectional shape, and forming a coating layer having a friction coefficient smaller than a friction coefficient between the insulating portion and the rubber cover between the cord switch body and the rubber cover. It was done.

According to a second aspect of the present invention, there is provided a cylindrical insulating portion formed of an insulator having elasticity, and a plurality of spirally formed parallel and curved lines formed of an electric conductor on the inner surface of the insulating portion. A code switch body having a rod-shaped conductive portion,
In a code switch comprising a rubber cover put on the code switch body, the code switch body is formed in a circular cross-sectional shape, the rubber cover is formed in an annular cross-sectional shape, and the code switch body and the rubber cover are formed. A coating layer having a friction coefficient smaller than the friction coefficient between the insulating portion and the rubber cover.

According to a third aspect of the present invention, the film layer has a thickness of one.
It is formed to be 2 μm or less.

According to a fourth aspect of the present invention, the coating layer is formed by winding a tape horizontally or vertically.

According to a fifth aspect of the present invention, the tape has an adhesive layer on one side, and is adhered around the cord switch body by the adhesive layer.

According to the configuration of the first aspect, when the cord switch body is inserted into the rubber cover, the frictional force between the coating layer formed around the cord switch body and the rubber cover is reduced, and Since the cross-sectional shape of the cord switch body is circular, it is not affected by twisting or the like, so that the cord switch can be inserted smoothly.

According to the configuration of the second aspect, the conductive portion is
Since it is provided in a spiral shape and a parallel curve shape on the inner surface of the insulating portion, it functions as a switch with respect to pressure from any direction and eliminates blind spots in operation.

According to the configuration of the third aspect, since the thickness of the coating layer is 12 μm or less, the flexibility of the cord switch is not impaired, and the conduction load hardly increases.

According to the configuration of the fourth aspect, since the coating layer is formed by winding the tape horizontally or vertically, the workability and simplicity are excellent, and the appearance is also good.

According to the fifth aspect of the present invention, since the tape is adhered around the cord switch body by the adhesive layer, the frictional force with the rubber cover can be reduced without peeling off the coating layer when the cord switch body is inserted. Reduce.

[0024]

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view of a round type two-electrode code switch according to an embodiment of the present invention.

As shown in FIG. 1, a code switch having a round shape and two electrodes is a door having an automatic opening / closing function.
It is attached to the opening and closing part of the opening and closing device such as a window and a shutter
A cord switch body 10 that is activated when pressed, a coating layer 15 formed on the outer periphery of the cord switch body 10 for reducing frictional force, and the cord switch body 10 is covered with the coating layer 15 interposed therebetween. And a rubber cover 20.

The cord switch body 10 has a gap h in the center.
_An insulating portion 12 made of a cylindrical insulator formed with ₃ ;
On the inner surface of the insulating portion 12, which is made of a conductive material, there are provided two cylindrical conductive portions (electrodes) 11 which are arranged in a spiral and parallel curved shape in the longitudinal direction so as to face each other.

The rubber cover 20 is attached to the cord switch body 1
It is formed of a cylindrical elastic body having a storage hole having the same shape as the outer shape of the “0”. The outer shape of the rubber cover 20 is formed in an oval cross section so that the conductive portions 11 are easily crushed in the direction in which the conductive portions 11 face each other, and furthermore, a flat attachment portion 16 is formed in a part of the outer periphery.

The coating layer 15 has a coefficient of friction between the rubber cover 20 or the insulating portion 12 and the insulating portion 12 and the rubber cover 2.
It is formed of a material having a coefficient of friction smaller than zero.
For example, polyester, polyimide, nylon, or the like is used. In the present embodiment, among them, the most effective polyester is used in terms of economy and versatility.

Further, the thickness of the coating layer 15 is 12 μm.
In particular, it is effective to form a layer having a thickness of 3 μm to 8 μm. This is because, when the thickness is 12 μm or more, the flexibility of the cord switch is significantly impaired, and the conduction load is greatly increased. Further, the diameter of the cord switch body 10 is increased, and the insertability is poor. This is because it may be.

The coating layer 15 has a heat-sealing layer (adhesive layer) on one side because it has a good appearance, is easy to insert after winding, and does not adversely affect flexibility. Is formed by being horizontally wound with 1/2 to 1/4 wrap.

Next, a method of manufacturing the code switch will be described together with its operation.

In manufacturing the cord switch, a heat seal layer (adhesive layer) of a tape is wound around the outer periphery of the cord switch body 10 in contact with the cord switch body side, and then heated to form a cord switch body. Then, a polyethylene coating layer 15 is formed around the cord switch body 10.

Then, the cord switch body 10 is inserted into the rubber cover 20.

The cord switch body 10 is
Since the tape as the coating layer 15 is adhered to the cord switch body 10, the cord switch body 10 is inserted without peeling off the tape, and friction between the coating layer 15 and the inner surface of the rubber cover 20 occurs. It is inserted while being done.

At this time, since the coefficient of friction between the coating layer 15 and the rubber cover 20 is small, the cord switch body 10 is inserted with the frictional force reduced. Further, since the cross-sectional shape of the cord switch body 10 is circular, it is not affected by twisting or the like.

As a result, the cord switch body 10 can be smoothly inserted into the rubber cover 20, so that the insertability of the cord switch body 10 is improved and the workability of attaching the cord switch is improved.

The provision of the coating layer 15 is effective regardless of the length of the cord switch, but is particularly effective when the length of the cord switch is 50 cm or more.

When the conductive portion 11 is arranged in a spiral shape in the longitudinal direction of the elastic insulating portion 12, the cord switch body 10 functions as a switch with respect to pressure from any direction. Blind spots are gone.

Next, another embodiment of the present invention will be described.

FIG. 2 is a sectional view of a square type cord switch as another embodiment.

As shown in FIG. 2, the cord switch of the rectangular type has a cord switch body 30 which is activated when pressed and a coating layer 25 formed on the outer periphery of the cord switch body 30 for reducing frictional force. And a rubber cover 40 covering the cord switch main body 30 with the coating layer 25 interposed therebetween.

The cord switch body 30 has a gap h in the center.
_An insulating portion 22 made of a cylindrical insulator formed with ₄ ;
It has two rectangular pillar-shaped conductive portions (electrodes) 21 made of a conductor and provided on the inner surface of the insulating portion 22 in the longitudinal direction and opposed to each other.

The rubber cover 40 is connected to the cord switch body 3
It is formed of a cylindrical elastic body having a storage hole having the same shape as the outer shape of the “0”. The outer shape of the rubber cover 40 is formed in an oval cross section so that the conductive portions 21 are easily crushed in the direction in which the conductive portions 21 face each other.

The coating layer 25 has a coefficient of friction between the rubber cover 40 or the insulating portion 22 and the insulating portion 22 and the rubber cover 4.
It is formed of a polyester having a coefficient of friction smaller than 0 and has a thickness of 12 μm or less.
The coating layer 25 is formed by horizontally winding a polyester tape having a heat seal layer (adhesive layer) on one side in 1/2 to 1/4 wrap.

According to the present invention, when the cord switch main body 30 is inserted into the rubber cover 40, the coefficient of friction between the coating layer 25 and the rubber cover 40 is increased similarly to the present embodiment. Is small, the cord switch body 30 is inserted with the frictional force reduced. Furthermore, since the cross-sectional shape of the cord switch body 30 is circular, it is not affected by twisting or the like.

As a result, the cord switch body 30 can be smoothly inserted into the rubber cover 40, so that the insertability of the cord switch body 30 is improved, and the workability of attaching the cord switch is improved.

FIG. 3 is a cross-sectional view showing another embodiment of a cord switch having a round shape and four electrodes.

As shown in FIG. 3, a cord switch having a round shape and four electrodes is formed on a cord switch main body 50 which is activated when pressed, and formed on the outer periphery of the cord switch main body 50 to reduce frictional force. Coating layer 35 for reduction
And a rubber cover 60 that covers the cord switch main body 50 with the coating layer 35 interposed therebetween.

The cord switch body 50 has a gap h in the center.
_An insulating portion 32 made of a cylindrical insulator formed with ₅ ;
Four cylindrical conductive portions (electrodes) 31 which are made of a conductive material, and which divide the inner surface of the insulating portion 32 into four equal parts in the circumferential direction, are arranged in a spiral shape and parallel curve shape in the longitudinal direction. I have.

The rubber cover 60 is connected to the cord switch body 5.
It is formed of a cylindrical elastic body having a storage hole having the same shape as the outer shape of the “0”. The outer shape of the rubber cover 60 is formed in an oval cross section so that the conductive portions 31 are easily crushed in the direction in which the conductive portions 31 face each other.

The coating layer 35 has a coefficient of friction between the rubber cover 60 or the insulating portion 32 and the insulating portion 32 and the rubber cover 6.
It is formed of a polyester having a coefficient of friction smaller than 0 and has a thickness of 12 μm or less.
The coating layer 25 is formed by horizontally winding a polyester tape having a heat seal layer (adhesive layer) on one side in 1/2 to 1/4 wrap.

According to the present invention, when the cord switch body 50 is inserted into the rubber cover 60, the coefficient of friction between the coating layer 35 and the rubber cover 60 is increased similarly to the present embodiment. Is small, the cord switch body 50 is inserted with the frictional force reduced. Furthermore, since the cross-sectional shape of the cord switch body 50 is circular, it is not affected by twisting or the like.

As a result, the cord switch body 50 can be smoothly inserted into the rubber cover 60, so that the insertability of the cord switch body 50 is improved, and the workability of attaching the cord switch is improved.

Further, the code switch is connected to the conductive portion 31.
Are arranged at positions equally divided into four in the circumferential direction and are provided in a spiral shape, so that when attached to the opening / closing part of the opening / closing device, the direction in which the conductive part 31 faces and the direction in which the cord switch is crushed are: Since they are arranged almost coincident with each other, the reliability of the code switch is improved.

As a modification of the embodiment shown in FIGS. 1 to 3, the coating layers 15, 25, 35 may be formed only on a part of the outer peripheral surface of the cord switch bodies 10, 30, 50. . However, considering the effects of preventing the peeling of the coating layers 15, 25, and 35 and improving the insertability, it is preferable to cover the entire circumference of the cord switch bodies 10, 30, and 50.

Further, in the above-described embodiment, the coating layer 1
5, 25, 35 are connected to the cord switch body 10, 30, 50.
The same effect can be expected by covering the inner surfaces of the rubber covers 20, 40, and 60.

As a method of coating the coating layers 15, 25, and 35, extrusion, dipping, coating, and tape winding by longitudinal attachment to the surface of the cord switch bodies 10, 30, and 50 may be used. From the viewpoint of properties, it is effective to use a horizontal winding or a vertical winding tape.

[0059]

Next, more specific examples of the present invention will be described together with comparative examples.

Example 1 As a coating layer, a thickness of 4 μm
Using a 13 mm wide polyester tape, it was horizontally wound around the cord switch body with 1/3 wrap. An adhesive layer was provided on one side of the polyester tape, and the polyester tape was bonded to the insulating portion of the cord switch body. Thereafter, the cord switch body was inserted into a rubber cover having an inner diameter that is 1.1 times the outer diameter of the cord switch body, thereby producing a round-type cord switch of 2 m.

Example 2 As a coating layer, a thickness of 6 μm
Using a polyimide tape having a width of 10 mm, the wire was horizontally wound around the cord switch body by 1/2 wrap. An adhesive layer was provided on one side of the polyimide tape, and the polyimide tape was bonded to the insulating portion of the cord switch body. Thereafter, the code switch body is inserted into a rubber cover having a void area of 1.2 times the cross-sectional area of the code switch body, and the round-type code switch is moved to 5 m.
Produced.

(Comparative Example 1) A cord switch 2 m equivalent to that of Example 1 was prepared except that no coating layer was provided.

Comparative Example 2 Example 2 was repeated except that the coating layer was not provided and the cross-sectional shape of the cord switch body was square.
A cord switch equivalent to 5 m was produced.

In manufacturing these cord switches, the operation of inserting the cord switch body into the rubber cover took 30 seconds in Example 1 whereas it took 5 minutes in Comparative Example 1.

From the above, according to the present invention, when the length is 2 m, the working time is reduced by 1 /
It can be said that it can be shortened to 10.

The operation of inserting the cord switch body into the rubber cover also took 80 seconds in Example 2 whereas it took 10 minutes in Comparative Example 2.

From the above, according to the present invention, when the length is 5 m, the working time is reduced to 1 / 7.5 by forming the coating layer and forming the cross section of the cord switch body into a circular shape.
It can be said that it can be shortened.

[0068]

In summary, according to the present invention, by forming a coating layer between the cord switch body and the rubber cover, the frictional force when the cord switch body is inserted into the rubber cover is reduced, and It will be easier. This allows
The workability of attaching the code switch to the opening / closing section of the switchgear is improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a round-type cord switch showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a square type cord switch showing another embodiment of the present invention.

FIG. 3 is a cross-sectional view of a round-type cord switch showing another embodiment of the present invention.

FIG. 4 is a sectional view of a conventional square type cord switch.

FIG. 5 is a sectional view of a conventional round type cord switch.

[Explanation of symbols]

 11, 21, 31 Conductive part 12, 22, 32 Insulating part 10, 30, 50 Cord switch body 15, 25, 35 Coating layer 20, 40, 60 Rubber cover

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Koichiro Akimoto 5-1-1 Hidaka-cho, Hitachi City, Ibaraki Prefecture Within Hitachi Cable Engineering Co., Ltd. (72) Inventor Yoshikazu Hayakawa 5 Hidaka-cho, Hitachi City, Ibaraki Prefecture F-term (reference) in Hitachi Cable, Ltd. Hidaka Factory 1-1G Chome No. 1-1G5

Claims (5)

[Claims] A cylindrical insulating portion formed of an insulator having elasticity, and a plurality of rod-shaped conductive portions formed of a conductor and provided on an inner surface of the insulating portion in a longitudinal direction and opposed to each other. A cord switch comprising a cord switch body and a rubber cover over the cord switch body,
The cord switch body is formed in a circular cross-sectional shape, the rubber cover is formed in an annular cross-sectional shape, and a friction coefficient between the insulating portion and the rubber cover is provided between the cord switch body and the rubber cover. A cord switch comprising a coating layer having a smaller coefficient of friction. 2. A cylindrical insulating portion formed of an elastic insulator, and a plurality of rod-shaped conductive portions formed of a conductor and provided on the inner surface of the insulating portion in a spiral and parallel curve shape. A code switch comprising a cord switch body and a rubber cover over the cord switch body, wherein the cord switch body is formed in a circular cross-sectional shape, and the rubber cover is formed in an annular cross-sectional shape,
A cord switch, wherein a coating layer having a friction coefficient smaller than a friction coefficient between the insulating portion and the rubber cover is formed between the cord switch body and the rubber cover. 3. The cord switch according to claim 1, wherein said coating layer has a thickness of 12 μm or less. 4. The cord switch according to claim 1, wherein said coating layer is formed by winding a tape horizontally or vertically. 5. The cord switch according to claim 4, wherein the tape has an adhesive layer on one side, and is adhered around the cord switch body by the adhesive layer.