CN110206436B

CN110206436B - Pinch detection switch

Info

Publication number: CN110206436B
Application number: CN201811591215.XA
Authority: CN
Inventors: 秋元克弥; 铃木秀一; 川濑贤司
Original assignee: Hitachi Metals Ltd
Current assignee: Proterial Ltd
Priority date: 2018-02-28
Filing date: 2018-12-25
Publication date: 2022-01-04
Anticipated expiration: 2038-12-25
Also published as: JP6447762B1; JP2019153372A; EP3533964B1; EP3533964A1; CN110206436A

Abstract

The invention provides a technology capable of improving buffer performance and making a clamping detection switch operate properly. The sandwiching detection switch (1) has a tubular pressure-sensitive detection member (5-1 to 5-3) having a plurality of separated electrode wires and a cover member (4) covering the pressure-sensitive detection member (5-1 to 5-3). When the cover member (4) is viewed in cross section, the cover member (4) is provided with a base (4-1), a hollow portion (7), and a deformation portion (4-2) provided on the base (4-1) so as to cover the hollow portion (7). Pressure-sensitive detection members (5-1 to 5-3) are disposed on the deformation portion (4-2), a receiving portion (8) for receiving the pressure-sensitive detection members (5-1 to 5-3) is disposed on the base portion (4-1), the receiving portion (8) has a first receiving surface for receiving the first pressure-sensitive detection member (5-1) at a position where the first pressure-sensitive detection member (5-1) faces, and a second receiving surface for receiving the second pressure-sensitive detection member (5-2) at a position where the second pressure-sensitive detection member (5-2) faces.

Description

Pinch detection switch

Technical Field

The present invention relates to a pinch detection switch, and for example, relates to a pinch detection switch mounted on a vehicle such as an automobile.

Background

For example,

patent documents

1 and 2 describe techniques related to a pinch detection switch mounted on an automobile. Patent document 1 describes a pinch detection switch provided in an automatic window. The pinch detection switch of patent document 1 includes a void portion and a pressure sensitive portion, and is a pressure sensitive type detection switch that detects pinch by the pressure sensitive portion. Patent document 2 describes a pinch detection switch provided in a sliding door of an automobile. In the pinch detection switch of patent document 2, the hollow tubular member having elasticity is deformed, and the plurality of electrode wires separated in the tubular member approach each other, and the resistance between the electrode wires changes, and the external force applied to the tubular member is detected from the change in resistance. That is, the pinch detection switch of patent document 2 is a pressure-sensitive pinch detection switch that detects application of an external force to a tubular member.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2000-343937

Patent document 2: japanese patent laid-open No. 2014-216300

Disclosure of Invention

Problems to be solved by the invention

For example, in order to further reduce the impact on the human body when the sliding door of an automobile comes into contact with the human body, the technique of patent document 2 needs to improve the cushioning property of a cover member made of rubber that covers a tubular member, for example. However, if the cushioning property of the cover member is improved, the external force applied to the tubular member is absorbed, and it is difficult to appropriately detect the sandwiching.

In the technique of patent document 1, for example, the gap may be increased to reduce the impact when the window contacts the human body. In this case, too, it is difficult to apply an external force to the pressure-sensitive portion, and it is difficult to appropriately detect sandwiching.

The present invention has been made in view of the above problems, and an object thereof is to provide the following technology: even if the cushioning property at the time of contact is improved, the pressure-sensitive pinch detection switch can be operated appropriately.

Means for solving the problems

The invention disclosed in the present application will be briefly described below as a representative embodiment.

That is, the pinch detection switch of one embodiment includes a tubular pressure-sensitive detection member having a plurality of separated electrode wires and a cover member covering the pressure-sensitive detection member. Here, when the cover member is viewed in cross section, the cover member includes a base portion, a hollow portion, and a deformation portion provided in the base portion so as to cover the hollow portion. The first pressure-sensitive detection member and the second pressure-sensitive detection member are disposed as pressure-sensitive detection members in the deformation portion, and a receiving portion for receiving the first pressure-sensitive detection member and the second pressure-sensitive detection member is disposed in the base portion. The receiving section includes a first receiving surface that receives the first pressure-sensitive detection member at a position facing the first pressure-sensitive detection member, and a second receiving surface that receives the second pressure-sensitive detection member at a position facing the second pressure-sensitive detection member.

The effects of the invention are as follows.

In the invention disclosed in the present application, the effects obtained by the representative embodiments are briefly described as follows.

That is, it is possible to provide a technique capable of improving the cushioning property and appropriately operating the pinch detection switch. When the deformation portion is deformed by being sandwiched or pulled, the first receiving surface receives the first pressure-sensitive detection member, and the second receiving surface receives the second pressure-sensitive detection member. Therefore, the pinch detection switch can be appropriately operated in both the pinching and the pulling. Further, the hollow portion can be used to improve the cushioning property.

Drawings

Fig. 1 is a sectional view of a pinch detection switch according to an embodiment.

Fig. 2 (a) and (B) are perspective views of the pinch detection switch and the pressure-sensitive detection member according to the embodiment.

Fig. 3 (a) to (D) are views for explaining the receiving unit according to the embodiment.

Fig. 4 is a cross-sectional view showing a state of the pinch detection switch of the embodiment.

Fig. 5 is a cross-sectional view showing a state of the pinch detection switch of the embodiment.

Fig. 6 is a schematic diagram showing a configuration of an automobile equipped with the pinch detection switch of the embodiment.

Description of the symbols

1-pinch detection switch, 2-window frame, 3-window glass, 4-cover component, 5-1-5-3-pressure sensitive detection component, 6-1-6-3, 7-hollow part, 8-bearing part, 8-1-upper surface, 8-2-first inclined surface, 8-3-second inclined surface, 20-automobile, 21-control device, CLI-center line of cover component, CNT 1-CNT 3-center point of pressure sensitive detection component.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. The disclosure is merely an example, and it is needless to say that appropriate modifications can be easily made by those skilled in the art while maintaining the gist of the invention, and the modifications are included in the scope of the invention. In the drawings, the width, thickness, shape, and the like of each part are schematically shown as compared with the actual form in order to make the description more clear, but this is merely an example and does not limit the explanation of the present invention.

In the present specification and the drawings, the same elements as those described above are denoted by the same reference numerals, and detailed description thereof may be omitted as appropriate.

(embodiment mode)

Fig. 6 is a schematic diagram showing a configuration of an automobile equipped with the pinch detection switch of the embodiment. Here, an example in which the pinch detection switch is applied to the automatic window will be described. In fig. 6, 2 shows a window frame of the automobile 20. The window glass 3 is moved up and down (raised and lowered) by an electric actuator. The pinching detection switch 1 of the embodiment is disposed on the window frame 2. When the window glass 3 is raised, if an object (including a human body) is sandwiched between the window frame 2 and the window glass 3, the sandwiching detection switch 1 detects the sandwiching and supplies a detection signal to the control device 21. When the detection signal reaches a predetermined value, the control device 21 stops, for example, the raising of the window glass 3. This can prevent injury or the like due to pinching. When an object is interposed, generally, an operation of pulling the object is performed, and the pinching detection switch also detects the pulling. In particular, in the case where the object is pulled out toward the outside of the vehicle, but not toward the inside of the vehicle, it is important to detect the pulling-out from the viewpoint of safety.

< pinch detection switch >

Fig. 1 is a sectional view of a pinch detection switch according to an embodiment. Fig. 2 (a) and (B) are perspective views showing the pinch detection switch of the embodiment. Here, fig. 2 (a) is a perspective view of the pinch detection switch 1, and fig. 2 (B) is a perspective view of the pressure-sensitive detection member 5-1 provided in the pinch detection switch 1. As shown in FIG. 2A, the pinch detection switch 1 includes three pressure-sensitive detection members 5-1 to 5-3, but since the pressure-sensitive detection members 5-1 to 5-3 have the same configuration, only one pressure-sensitive detection member 5-1 is shown in FIG. 2B. Fig. 1 is a sectional view as seen from a-a section in fig. 2 (a).

The pinching detection switch 1 includes a cover member 4, and the cover member 4 is disposed on the window frame 2 so as to be deformable and extends in the extending direction Y of the window frame 2. As shown in FIG. 2, the cover member 4 covers the pressure-sensitive detection members 5-1 to 5-3 extending in the same direction as the cover member 4. The cover member 4 covers the hollow portion 7 extending in the same direction as the cover member 4. The cover member 4 of the pinching detection switch 1 is formed of, for example, rubber, and as shown in fig. 1, a part of the cover member 4 is embedded in the window frame 2.

As shown in fig. 1, the cover member 4 includes, as viewed in cross section: a thicker base portion 4-1 in contact with the sash 2; and an elastic deformation portion 4-2 which is opposed to and deformed by the surface 3-1 of the window glass 3. A hollow portion 7 is formed between the base portion 4-1 and the deformation portion 4-2. Further, the deformation portion 4-2 includes, as viewed in cross section: an upper surface deformation portion 4-2U facing the base surface 4-3 of the base portion 4-1 and covering the pressure-sensitive detection members 5-1 to 5-3; and a side surface deformation portion 4-2S formed integrally with the upper surface deformation portion 4-2U and the base portion 4-1 so as to connect the upper surface deformation portion 4-2U and the base portion 4-1.

The pressure-sensitive detection member 5-1 as the first pressure-sensitive detection member is embedded in the upper surface deformation portion 4-2U so that the center point CNT1 thereof is disposed on the center line CLI of the cover member 4. Further, the pressure-sensitive detection section 5-2 as a second pressure-sensitive detection section is embedded in the upper surface deformation section 4-2U located on one side (right side of the paper surface in fig. 1) with respect to the center line CLI. In addition, the pressure-sensitive detection section 5-3 as a third pressure-sensitive detection section is embedded in the upper surface deformation portion 4-2U located on the other side (left side of the paper surface in fig. 1) with respect to the center line CLI. An imaginary straight line IML1 connects the center line CLI and the center point CNT2 of the pressure-sensitive sensing section 5-2, an imaginary straight line IML2 connects the center line CLI and the center point CNT3 of the pressure-sensitive sensing section 5-3, and an angle between the imaginary straight line IML1 and the center line CLI and an angle between the imaginary straight line IML2 and the center line CLI are the same angle α 1. Although not particularly limited, the angle α 1 is 45 degrees. Thus, the pinch detection switch 1 includes the upper surface deformation portion 4-2U and the side surface deformation portion 4-2S which are symmetrical with respect to the center line CLI.

The pressure-sensitive detection members 5-1 to 5-3 are pressed against a receiving portion 8 described later at the time of sandwiching and pulling, and deformed in a squashed manner. When the pressure-sensitive detection members 5-1 to 5-3 are pressed against the receiving portion 8, a part of the upper surface deformation portion 4-2U is sandwiched between the pressure-sensitive detection members 5-1 to 5-3 and the receiving portion 8 as a cover portion. In the figure, the cover part is shown by symbols 4-4 to 4-6.

In fig. 1, one side with respect to the center line CLI is the vehicle inside of the vehicle 20, and the other side with respect to the center line CLI is the vehicle outside of the vehicle 20. In the case where an object is sandwiched, the deformation portion 4-2 is deformed, and the pressure-sensitive detection member 5-1 is mainly crushed, thereby detecting the sandwiching. On the other hand, when the pulling-out operation of the object from the vehicle exterior side is performed, the deformation portion 4-2 is deformed, and the pressure sensitive detection member 5-2 is mainly crushed, thereby detecting the pulling-out from the vehicle exterior side. When the object is pulled from the vehicle interior side, the deformation portion 4-2 is deformed, and the pressure-sensitive detection member 5-3 is mainly crushed, thereby detecting the pulling from the vehicle interior side.

The base 4-1 is provided with a receiving part 8, and the receiving part 8 receives the pressure-sensitive detection parts 5-1 to 5-3 when the deformation part 4-2 is deformed. As shown in fig. 1, the receiving portion 8 has a trapezoidal shape whose area becomes narrower from the base portion 4-1 toward the upper surface deformation portion 4-2U. That is, the receiving unit 8 includes: an upper surface 8-1 parallel to the base surface 4-3 which brings the base portion 4-1 and the hollow portion 7 into contact; a first inclined surface 8-2 connecting the upper surface 8-1 and the base surface 4-3; and a second bevel 8-3 connecting the upper surface 8-1 and the base surface 4-3. Since the receiving portion 8 has a trapezoidal shape in which the upper surface 8-1 facing the upper surface deformation portion 4-2U is narrower than the bottom surface facing the base surface 4-3, the inner angle α 2 between the first inclined surface 8-2 and the second inclined surface 8-3 and the base surface 4-3 exceeds 0 degrees and is smaller than 90 degrees.

The center line CLI of the cover member 4 passes through the center of the upper surface 8-1 of the receiving portion 8, and the receiving portion 8 has a bilaterally symmetrical structure as shown in fig. 1 with the center line CLI as a reference. The receiving portion 8 is also formed of rubber, as in the case of the cover member 4.

When the deformation portion 4-2 is deformed by being sandwiched, the pressure-sensitive detection member 5-1 is pressed against the upper surface 8-1 of the receiving portion 8 via the cover portion 4-4. That is, the upper surface 8-1 of the receiving portion 8 faces the pressure-sensitive detection member 5-1 and functions as a receiving surface for the pressure-sensitive detection member 5-1. In contrast, when the deformation portion 4-2 is deformed by being pulled from the vehicle outside, the pressure-sensitive detection member 5-2 is pressed against the first inclined surface 8-2 of the receiving portion 8 via the cover portion 4-5. That is, the first inclined surface 8-2 of the receiving portion 8 faces the pressure-sensitive detection member 5-2 and functions as a receiving surface of the pressure-sensitive detection member 5-2. In addition, when the deformation portion 4-2 is deformed by pulling from the vehicle interior side, the pressure sensitive detection member 5-3 is pressed to the second slope 8-3 of the receiving portion 8 via the cover portion 4-6. That is, the second slope 8-3 of the receiving portion 8 faces the pressure-sensitive detection member 5-3 and functions as a receiving surface of the pressure-sensitive detection member 5-3.

As shown in fig. 2 (B), the pressure-sensitive detection member 5-1 is a tubular detection member having separated electrode lines ED1 to ED 4. The member of the pressure sensitive detection member 5-1 surrounding the separated electrode lines ED1 to ED4 has elasticity, and by applying an external force, the hollow portion 6-1 deforms in such a manner that the separation distance between the electrode lines ED1 to ED4 changes. The plurality of electrode wires constituting the pressure-sensitive detection member are formed spirally along the longitudinal direction of the pressure-sensitive detection member. Thereby, the external force can be detected in all directions in the radial direction from the pressure sensitive detection member. The resistance between the electrode lines ED 1-ED 4 varies according to the separation distance. The change in the resistance between the electrode lines ED1 to ED4 is supplied as the value of the detection signal to the control device 21 shown in fig. 6. The pressure-sensitive detection members 5-2 and 5-3 are also provided with hollow portions 6-2 and 6-3 and electrode lines ED1 to ED4, as with the pressure-sensitive detection member 5-1. The pressure-sensitive detection member 5-1 is the same as the tubular member shown in the above-mentioned patent document 2, and further detailed description is omitted.

Hereinafter, the pressure-sensitive detection member 5-1 is moved toward the upper surface 8-1 of the receiving portion 8 by being sandwiched, and is deformed so as to be crushed, as described with reference to fig. 4. The pressure sensitive detection member 5-1 is pressed, and the sandwiching is detected based on the detection signal. The detection sensitivity at this time can be determined by the distance L1 between the cover portion 4-4 and the upper surface 8-1 of the receiving portion 8 when the deformable portion 4-2 is not deformed. In this case, the shorter the distance L1, the higher the detection sensitivity can be.

In the following, with reference to fig. 5, the pressure-sensitive detection member 5-2 is deformed so as to be crushed by being moved toward the first inclined surface 8-2 of the receiving portion 8 by being pulled toward the outside of the vehicle. The pull-out is detected based on the detection signal at this time. The detection sensitivity of the pull-out can be determined by the inner angle α 2 and the distance L2 between the cover portion 4-5 and the first inclined surface 8-2 of the receiving portion 8 when the deformable portion 4-2 is not deformed. Similarly, the pressure-sensitive detection member 5-3 is deformed so as to be squashed by being pulled toward the inside of the vehicle and moving toward the second inclined surface 8-3 of the receiving portion 8. The pull-out is detected based on the detection signal at this time. The detection sensitivity of the pull-out can be determined by the inner angle α 2 and the distance L3 between the cover portion 4-6 and the second slope 8-3 of the receiving portion 8 when the deformable portion 4-2 is not deformed. In both the case of pulling toward the inside of the vehicle and the case of pulling toward the outside of the vehicle, the shorter the distances L2 and L3 are, the higher the detection sensitivity can be. Further, the closer the interior angle α 2 is to 90 degrees, the higher the detection sensitivity can be.

In the embodiment, the case where the inner angle α 2 formed by the first slope 8-2 is the same as the inner angle α 2 formed by the second slope 8-3 is described as an example, but the present invention is not limited thereto. That is, the interior angle α 2 formed by the first slope 8-2 may be different from the interior angle α 2 formed by the second slope 8-3. By changing the inner angle α 2 formed by the respective slopes, the detection sensitivity for the pull-out from the vehicle outside and the detection sensitivity for the pull-out from the vehicle inside can also be made different.

When the pinching and pulling are detected, the upper surface 8-1, the first slope 8-2, or the second slope 8-3 of the receiving portion 8 comes into contact with the surface of the hood portion 4-4, 4-5, or 4-6. In order to make the pressure-sensitive detection members 5-1 to 5-3 more easily deformable (easily crushable), it is preferable that the wall thickness of the cover member 4 sandwiched between the surface of the cover portion 4-4, 4-5 or 4-6 and the surface of the pressure-sensitive detection member 5-1 to 5-3 is thinner than the wall thickness of the cover member 4 sandwiched between the surface of the pressure-sensitive detection member 5-1 to 5-3 and the outer side surface of the deformable portion 4-2.

< trapezoidal shape receiving part 8 >

According to the embodiment, the outer shape of the receiving portion 8 is a trapezoidal shape. Thus, when the deformation portion 4-2 is deformed by being sandwiched or pulled, the absorption of the pressure by the receiving portion 8 is reduced, and the external force applied to the pressure-sensitive detection members 5-1 to 5-3 can be increased.

Fig. 3 (a) to (D) are views for explaining the receiving unit according to the embodiment. Here, the case of using a receiving portion having a rectangular parallelepiped outer shape as the receiving portion 8 and the case of using a receiving portion having a trapezoidal outer shape as in the embodiment are compared and explained.

Fig. 3 (a) and (B) are diagrams illustrating the sandwiching, and fig. 3 (C) and (D) are diagrams illustrating the drawing. Fig. 3 (a) and (C) show the case where the receiving portion 8 has a rectangular parallelepiped shape, and fig. 3 (B) and (D) show the case where the receiving portion 8 has a trapezoidal shape.

If the sandwiching occurs, the deformation portion deforms, and the pressure-sensitive detection member 5-1 shown in fig. 1 is pressed to the upper surface 8-1 of the receiving portion 8 via the cover portion 4-4. Thus, an external force STR1 is applied to the upper surface 8-1 of the receiving portion 8. In the case of the rectangular parallelepiped-shaped receiving portion, as shown on the right side of the paper surface in fig. 3 (a), the middle abdominal portion of the receiving portion 8 is expanded by the external force STR1, and the rectangular parallelepiped-shaped receiving portion 8 is crushed toward the base surface 4-3. That is, the external force STR1 is absorbed by the squashing of the receiving portion 8, and the pressure applied to the pressure-sensitive detection member 5-1 is reduced. In contrast, in the case of the trapezoidal receptacle 8, the external force STR1 is dispersed to the large bottom surface of the trapezoidal shape, and the middle abdominal region of the receptacle 8 can be reduced from expanding as shown on the right side of the drawing sheet of fig. 3 (B). This reduces the amount of crushing of the upper surface 8-1, which is the receiving surface of the receiving portion 8 toward the base surface 4-3, and thus reduces the amount of absorption of the external force STR1 by the receiving portion 8. As a result, the external force applied to the pressure-sensitive detection member 5-1 can be increased.

Next, a case where the drawing to the outside of the vehicle occurs will be described. By applying external force STR2 from the vehicle interior side, pulling toward the vehicle exterior side can be simulated.

As shown on the right side of the paper surface in fig. 3 (C), in the rectangular parallelepiped receiving section 8, the receiving section 8 is inclined in the direction of the external force STR2, and the rectangular parallelepiped is deformed so as to retreat from the external force STR 2. The external force STR2 is absorbed by this deformation, resulting in a reduction in the external force applied to the pressure-sensitive detection part 5-2.

In contrast, in the trapezoidal receiving portion 8, the second inclined surface 8-3 on the opposite side of the first inclined surface 8-2 functions as a brace against the external force STR2, and the receiving portion 8 is difficult to deform. As a result, the external force STR2 is reduced from being absorbed by the deformation of the receiving portion 8, and the external force applied to the pressure-sensitive detection member 5-2 can be increased.

Here, although the drawing to the outside of the vehicle is taken as an example, the external force applied to the pressure-sensitive detection member 5-3 can be applied similarly to the drawing to the inside of the vehicle.

Thus, by using the trapezoidal receiving portion 8, the external force applied to the pressure-sensitive detection members 5-1 to 5-3 can be increased during the sandwiching and the pulling, and the detection sensitivity can be improved.

Next, the states of the pinching detection switch 1 at the time of pinching and pulling will be described. Fig. 4 and 5 are cross-sectional views showing states of the pinch detection switch of the embodiment. First, the sandwiching will be described with reference to fig. 4.

< sandwiching >

Fig. 4 shows a state of the pinching sensing switch 1 when an object, not shown, is pinched.

In fig. 4, the two-dot chain line shows the initial state of the deformation portion 4-2 when the object is not sandwiched. The deformation portion 4-2 is deformed by the object being sandwiched. In this case, the upper surface deformation portion 4-2U deforms so as to move in the direction of the upper surface 8-1 of the receiving portion 8, and the side surface deformation portion 4-2S deforms so as to expand to the left and right in the paper plane.

The upper surface deforming portion 4-2U is moved in the direction of the upper surface 8-1, whereby the pressure-sensitive detection member 5-1 is pressed to the opposite upper surface 8-1 via the hood portion 4-4, and the pressure-sensitive detection member 5-1 is deformed in a squashed manner. The controller 21 shown in fig. 6 detects the presence of pinch based on, for example, the value of the detection signal when the pressure-sensitive detection member 5-1 is in the state shown in fig. 4.

< drawing >

Fig. 5 shows a state in which an operation of drawing an object, not shown, is performed. Here, a case where an operation of pulling out an object from the vehicle exterior side is performed will be described. The state of the deforming part 4-2 before the drawing operation is performed is, for example, an initial state shown by a two-dot chain line in fig. 4.

In the drawing operation, in the upper surface deformation portion 4-2U of the deformation portion 4-2, the object comes into contact with a portion on the right side of the paper surface, and the object deforms the deformation portion 4-2 in such a manner that the upper surface deformation portion 4-2U moves to the left side of the paper surface. Since the upper surface deformation portion 4-2U is deformed so as to move to the left side of the paper surface, the side surface deformation portion 4-2S is also deformed so as to incline to the left side of the paper surface.

Since the upper surface deforming portion 4-2U moves to the left side of the paper surface, as shown in fig. 5, the pressure sensitive detection member 5-2 disposed on the vehicle interior side abuts against the first inclined surface 8-2 of the receiving portion 8, and the pressure sensitive detection member 5-2 is pressed against the opposing first inclined surface 8-2 via the cover portion 4-5 and is deformed in a squashed manner. The control device 21 shown in fig. 6 detects the presence of pull-out from the outside of the vehicle based on, for example, the value of the detection signal when the pressure-sensitive detection means 5-2 is in the state shown in fig. 5.

The case of drawing from the vehicle exterior side is described, but the same applies to the case of drawing from the vehicle interior side. That is, the pressure-sensitive detection member 5-3 disposed on the vehicle outside is deformed in a crushed manner for the pulling operation from the vehicle inside.

In this way, the pinch detection switch 1 of the embodiment can appropriately detect both pinching and pulling. Further, since the hollow portion 7 is provided in the cover member 4, the cushioning property can be improved.

In the embodiment, as shown in fig. 1, the thickness 4B of the side surface deformation portion 4-2S is smaller than the thickness 4A of the upper surface deformation portion 4-2U. Therefore, when the pinching and the pulling are generated, the side surface deforming portion 4-2S is easily deformed, and the detection sensitivity can be improved.

< modification example >

A plurality of modifications will be described below.

In the pinch detection switch of the first modification, the pressure-sensitive detection member 5-3 described above is deleted. That is, only the pressure-sensitive detection member 5-1 for mainly detecting sandwiching and the pressure-sensitive detection member 5-2 for mainly detecting pulling from the outside of the vehicle are arranged in the upper surface deformation portion 4-2U. This can suppress the cost of the pinch detection switch.

In the pinch detection switch of the second modification example, a convex portion is disposed on at least one of the upper surface 8-1 of the receiving portion 8, the first inclined surface 8-2, and the second inclined surface 8-3. The convex portion has a shape protruding toward the upper surface deformation portion 4-2U. The pressure-sensitive detection member can be more easily crushed by the projection.

In the second modification, the convex portion is formed in a band shape on the upper surface 8-1, the first slope 8-2, and the second slope 8-3. In the above description of the surface 8-1 as an example, the convex portion extending in the same direction as the extending direction of the cover member 4 (Y direction in fig. 2) is provided on the upper surface 8-1. Thus, on the upper surface 8-1, the band-shaped convexo-concave portions are formed by the portions provided with the convex portions and the portions not provided with the convex portions. The first bevel 8-2 and the second bevel 8-3 are also identical to the upper surface 8-1 described above. Such a strip-shaped convex portion can be easily formed by extrusion, for example.

The convex portion may be formed integrally with the receiving portion 8, or the convex portion may be prepared separately from the receiving portion 8 and provided on the surface of the receiving portion 8.

In the pinch detection switch of the third modification, pressure-sensitive detection members 5-1 to 5-3 are prepared separately from the cover member 4. When viewed in cross section, the cover member 4 is formed with an insertion opening having an area larger than the cross-sectional area of the pressure-sensitive detection members 5-1 to 5-3. Separately prepared pressure sensitive detection parts 5-1 to 5-3 are inserted into corresponding insertion openings in the cover part 4. Therefore, when the pressure-sensitive detection parts 5-1 to 5-3 are inserted into the corresponding insertion openings, the pressure-sensitive detection parts 5-1 to 5-3 can be prevented from twisting.

In the third modification, the cross-section of the pressure-sensitive detection members 5-1 to 5-3 is elliptical. In addition, an adhesive is put into the insertion opening, and the circular or elliptical pressure-sensitive detection members 5-1 to 5-3 are inserted into the corresponding insertion openings.

The receiving portion 8 of the embodiment is formed of rubber as in the case of the cover member 4, but the receiving portion 8 may be integral with the cover member 4 or may be separate. Similarly, the pressure-sensitive detection members 5-1 to 5-3 may be integrated with the cover member 4 or may be separate as described in the third modification.

In the embodiment, the upper surface 8-1, the first inclined surface 8-2, and the second inclined surface 8-3 are flat surfaces, but the upper surface 8-1, the first inclined surface 8-2, and the second inclined surface 8-3 are not limited to a flat surface and may be curved surfaces as long as the effects of the present invention are obtained.

The present invention has been described specifically based on the embodiments, but the present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made within the scope not departing from the gist thereof. For example, in the embodiment, the application object is an automobile, but the application object is not limited to an automobile, and may be a railroad car, a home door, an elevator, a back door, or the like.

Claims

1. A pinch detection switch includes a tubular pressure-sensitive detection member having a plurality of separated electrode wires and a cover member covering the pressure-sensitive detection member,

the pinch detection switch is characterized in that,

in a cross-sectional view of the cover member, the cover member includes a base portion, a hollow portion, and a deformation portion provided in the base portion so as to cover the hollow portion,

a first pressure-sensitive detecting member and a second pressure-sensitive detecting member are disposed in the deforming portion,

a receiving portion for receiving the pressure sensitive detection member is disposed in the base portion,

the receiving portion includes a first receiving surface that receives the first pressure-sensitive detection member at a position facing the first pressure-sensitive detection member, and a second receiving surface that receives the second pressure-sensitive detection member at a position facing the second pressure-sensitive detection member,

the outer shape of the receiving portion has a trapezoidal shape that is narrowed from the base portion toward the deformation portion in a cross-sectional view of the cover member,

the upper surface of the trapezoidal receiving portion is the first receiving surface, and the first inclined surface of the trapezoidal receiving portion is the second receiving surface.

2. The pinch detection switch of claim 1,

when the cover member is viewed in cross section, the center point of the first pressure-sensitive detection member is disposed on the center line of the cover member, the center line of the cover member passing through the base and the deformation portion,

when the cover member is viewed in cross section, the second pressure-sensitive detection member is disposed on one side with respect to a center line of the cover member, and a center point of the second pressure-sensitive detection member is disposed on a first virtual straight line that forms a predetermined angle with respect to the center line.

3. The pinch detection switch of claim 2,

the pinch detection switch includes a third pressure-sensitive detection member disposed in the deformation portion,

when the cover member is viewed in cross section, the third pressure-sensitive detection member is disposed on the other side with respect to a center line of the cover member, and a center point of the third pressure-sensitive detection member is disposed on a second virtual straight line forming a predetermined angle with respect to the center line,

the receiving portion of the trapezoidal shape includes a second inclined surface that is different from the first inclined surface, faces the third pressure-sensitive detection member, and serves as a third receiving surface that receives the third pressure-sensitive detection member.

4. The pinch detection switch of claim 3,

when the cover member is viewed in cross section, the deformable portion includes an upper surface deformable portion where the first pressure-sensitive detection member, the second pressure-sensitive detection member, and the third pressure-sensitive detection member are arranged, and a side surface deformable portion located between the upper surface deformable portion and the base portion,

when the cover member is viewed in cross section, the side surface deformation portion has a wall thickness smaller than that of the upper surface deformation portion.