JPH1123386A - Pressure sensitive sensor and weather strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent erroneous judgment as caused by a contact of an electrode part of a pressure sensitive sensor with a window glass when it is closed. SOLUTION: A clearance 51 is formed to make a preceding deformation part which is elastically deformed preceding a pressure sensitive sensor 4 to the side opposite to a window glass 2 sandwiching the pressure sensitive sensor 4 to displace the pressure sensitive sensor 4 to the side opposite (inside a room) to the window glass body when the window glass 2 is closed. This can block elastic deformation of the pressure sensitive sensor 4 thereby preventing erroneous judgment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor for detecting whether or not a foreign object is trapped between a window gas and a window frame by detecting an external force acting on the window frame. It relates to a pressure sensor.

[0002]

2. Description of the Related Art In recent years, a so-called sashless (hardtop) vehicle (hereinafter, such a vehicle is referred to as an HT vehicle) in which a window frame is not provided on a vehicle door and a roof or a pillar (pillar) of the vehicle also serves as a window frame. .) Is increasing. In such an HT vehicle, the pressure-sensitive sensor is necessarily disposed in the weather strip.

[0003]

By the way, the present inventors have arranged a pressure-sensitive sensor in a weather strip of an HT vehicle, and have conducted an evaluation study on the determination of foreign object entrapment by the pressure-sensitive sensor. At the time of closing, there is a problem that a foreign object is erroneously determined to be occurring even though a foreign object is not actually trapped.

[0004] The inventors of the present invention continued to investigate the cause of the erroneous determination and found the following points. That is, in an HT vehicle, since the vehicle door does not have a window frame, the weather strip is provided on the roof or the pillar, and when closing the opening of the window, the window glass is pressed against the weather strip and one of the weather strips is pressed. By elastically deforming the portion, rainwater and the like are prevented from entering the vehicle interior.

For this reason, when the window glass 2 is closed, FIG.
As shown in (b), when the pressure-sensitive sensor 4 is elastically deformed together with the weather strip 5, the first electrode 41 and the second electrode 42 of the pressure-sensitive sensor come into contact with each other, resulting in an erroneous determination. In view of the above, it is an object of the present invention to prevent a pressure sensor from erroneously determining when a moving body such as a window glass is closed.

[0006]

The present invention uses the following technical means to achieve the above object. Claim 1,
According to the invention described in Item 3, when the opening (3a) of the window is closed by the moving body (2), the window is elastically deformed before the sensor (S), so that the pair of electrode portions (41, 4) is formed.
2) It is characterized by including a pre-deformation portion (44, 51) for maintaining the interval between them.

Thus, when the opening (3a) is closed by the moving body (2), it is possible to prevent the two electrodes (41, 42) from coming into contact with each other in the sensor (S). In addition, erroneous determination of the pressure-sensitive sensor can be prevented. According to the second and third aspects of the present invention, when the opening (3a) is closed by the moving body (2), the portion corresponding to the moving body (2) is located ahead of the sensor section (S). The pair of electrode portions (41, 4) are elastically deformed.
2) A pre-deformed portion (44) for maintaining an interval therebetween is formed.

Accordingly, even when a part of the weather strip (5) is elastically deformed when the moving body (2) is closed, the deformation stops at the pre-deformed portion (44) as described later. (2) It is possible to prevent erroneous determination of the pressure sensor when closing (2). In the invention according to claims 4 and 5,
On the opposite side of the moving body (2) across the pressure-sensitive sensor (4),
When the opening (3a) is closed by the moving body (2), the pressure-sensitive sensor (4) is displaced to the opposite side to the moving body (2) by being elastically deformed before the pressure-sensitive sensor (4). A pre-deformation portion (51) to be formed is formed.

Thus, the pressure-sensitive sensor (4) can be prevented from being elastically deformed, so that when the moving body (2) is closed, the pressure-sensitive sensor (4) makes an erroneous determination. Can be prevented. In addition, the code | symbol in the parenthesis of each said means shows the correspondence with the concrete means of embodiment mentioned later.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIG. 1 shows an HT having a powered window opening / closing device (power window mechanism) having a pinch prevention mechanism.
A vehicle door 1 of the vehicle is shown. Reference numeral 1 denotes a drive motor that drives a window glass (moving body) 2 that opens and closes an opening 3a of the window, and 3 denotes a window frame that partitions the opening 3a. As described above, the window frame 3 is configured by a vehicle roof, a pillar (pillar), and the like, and is independent of the vehicle door.

[0011] In addition, on the periphery of the window frame 3 on the vehicle interior side,
One pressure-sensitive sensor 4 for detecting external force is provided on the front side 3 of the window frame 3.
The pressure-sensitive sensor 4 is disposed over the upper side portion 3c from the upper side b, and as shown in FIG. 2, an elastically deformable material such as rubber that seals a gap between the window glass 2 and the window frame 3 is used. Embedded in a weather strip 5 made of The structure of the pressure sensor 4 will be described later.

An external force equal to or greater than a predetermined value is applied to the pressure-sensitive sensor 4.
, The pressure-sensitive sensor 4 emits a signal 4 a toward the control device 6. On the other hand, when the signal 4a is input, the control device 6 considers that a foreign object is interposed between the window frame 3 and the window glass 2, and inverts the drive motor 1 to turn the window glass 2
(See FIG. 1). Next, FIG.
It is described using.

Reference numeral 40 denotes a tube made of an insulating and elastically deformable material such as rubber. A conductive material such as a metal is provided on the inner wall of the tube 40 (on the side opposite to the window glass 2). A first electrode portion 41 made of conductive rubber mixed with is formed extending in the longitudinal direction of the tube 40. The tube 40 facing the first electrode portion 41
A second electrode portion 42 made of conductive rubber and having a predetermined gap (interval) 43 is provided on the inner wall of the tube 40.
Are formed so as to extend in the longitudinal direction.

The pressure-sensitive sensor 4 generates a signal 4a when the tube 40 and the two electrode portions 41 and 42 are elastically deformed by an external force and the two electrode portions 41 and 42 come into contact with each other. Therefore, the two electrode portions 41 and 42 and the gap 43 are hereinafter referred to as a sensor portion S. On the other hand, the window glass 2 in the tube 40
When the opening 3a is closed by the window glass 2, the portion corresponding to the side is elastically deformed before the sensor portion S, thereby maintaining the gap 43 between the pair of electrode portions 41 and 42. One void 44 forming a portion is formed.

Reference numerals 45 and 46 denote both electrode portions 41 and 42.
Are wires (conductive wires) made of a material having a small electric resistance such as a metal to prevent a voltage drop in the sensor, and these wires 45 and 46 are on the bending neutral surface (neutral axis) of the pressure-sensitive sensor 4. It is embedded in each of the electrode portions 41 and 42 so as to be located. Next, features of the present embodiment will be described.

According to the present embodiment, since the gap 44 forming the pre-deformation portion is formed in the pressure-sensitive sensor 4, when the window glass 2 is closed, a part of the weather strip 5 is closed as shown in FIG. Even if it is elastically deformed, the deformation is stopped in the gap 44, so that erroneous determination of the pressure sensor when the window glass 2 is closed can be prevented. Further, in the present embodiment, erroneous determination can be prevented by a simple means such as forming a gap 44 in a portion of the tube 40 corresponding to the window glass 2 side, so that the manufacturing cost of the pressure-sensitive sensor 4 can be increased. Can be suppressed. Consequently, it is possible to suppress an increase in the manufacturing cost of the power window while preventing erroneous determination.

(Second Embodiment) In the above-described embodiment, the pressure-sensitive sensor 4 is provided with the gap 44 forming a pre-deformed portion. However, in the present embodiment, as shown in FIG. An air gap 51 forming a pre-deformed portion is formed at a portion opposite to the window glass 2 (inside the vehicle compartment) with the pressure sensor 4 interposed therebetween.

Thus, when the opening 3a is closed by the window glass 2, the gap 51 is elastically deformed before the pressure-sensitive sensor 4, as shown in FIG. Since it is displaced to the opposite side (inside the vehicle compartment), it is possible to prevent the pressure-sensitive sensor 4 from being elastically deformed. Therefore, it is possible to prevent the pressure sensor 4 from making an erroneous determination when the window glass 2 is closed.

This embodiment differs from the above-described embodiment in that a gap 51 is formed in the weather strip 5 to prevent malfunction of the pressure-sensitive sensor 4.
4 and 5, the structure of the pressure-sensitive sensor 4 is not limited to the U-shaped one in which the first electrode portion 41 is convex toward the closing direction of the window glass 2, as shown in FIGS. For example, as described in JP-A-6-260054, both electrode portions 41 and 42 may be formed in a simple band shape.

In the first and second embodiments, the pressure sensitive sensor 4 is disposed (embedded) in the weather strip 5 with the tube 40 of the pressure sensitive sensor 4 and the weather strip 5 being separate bodies. The weather strip 5 may be integrated, and the pressure sensor 4 and the weather strip 5 may be integrated into a pressure sensor. Further, a gap 4 forming a pre-deformed portion is formed in both the pressure-sensitive sensor 4 and the weather strip 5.
1, 51 may be formed.

Further, in the first and second embodiments, the pre-deformed portion is constituted by one gap 41, 51, but may be constituted by a foam such as urethane having a large number of gaps. In the first and second embodiments, the present invention has been described by taking the power window mechanism as an example. However, an opening other than the vehicle door such as a sunroof for opening and closing a ceiling window of a vehicle and a sliding door for opening and closing a doorway are opened and closed. The present invention can also be applied to an opening / closing mechanism that drives a moving body to open / close.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a power window mechanism.

FIG. 2 is a sectional view taken along the line AA of FIG. 1 in a state where a window glass is opened in the first embodiment.

FIG. 3 is a sectional view taken along line AA of FIG. 1 in a state where a window glass is closed in the first embodiment.

FIG. 4 is a sectional view taken along line AA of FIG. 1 in a state where a window glass is opened in the second embodiment.

FIG. 5 is a cross-sectional view taken along the line AA of FIG. 1 in a state where a window glass is closed in the second embodiment.

FIG. 6 is an explanatory diagram for explaining “means for solving the problem”;

[Explanation of symbols]

Reference numeral 2 denotes a window glass, 4 denotes a pressure-sensitive sensor, 5 denotes a weatherstrip, 44 and 51 denotes a gap (pre-deformed portion).

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI H01H 13/52 B60J 1/16 A (72) Inventor Kenji Nishio 390 Umeda, Kosai City, Shizuoka Prefecture Asmo Stock Company In-house

Claims (5)

[Claims] 1. A window frame (3) defining an opening (3a) of a window, which is disposed on the indoor side with respect to a moving body (2) that opens and closes the opening (3a), A) a pressure-sensitive sensor for detecting an external force acting on the movable body (2) and the window frame (3) when the opening (3a) is closed. A strip portion (5), and a pair of electrode portions (41, 42) disposed in the weather strip portion (5) and opposed to each other at a predetermined interval.
And an elastically deformable sensor portion (S) configured to have: a. When the opening (3a) is closed by the moving body (2), the sensor portion (S) elastically deforms before the sensor portion (S). A pressure-sensitive sensor comprising: a deformable portion (44, 51) for maintaining an interval between the pair of electrode portions (41, 42). 2. A window frame (3) defining an opening (3a) of a window, which is disposed on the indoor side with respect to a moving body (2) that opens and closes the opening (3a), ) Is a pressure-sensitive sensor that detects an external force acting on a pair of electrode portions (4) that are disposed to face each other at a predetermined interval.
1, 42) and an elastically deformable sensor portion (S) formed at a portion corresponding to the moving body (2) side, and the opening (3a) is provided at the moving body (2). And a deformable portion (44) that elastically deforms before the sensor portion (S) when closed to maintain an interval between the pair of electrode portions (41, 42). Pressure sensor. 3. The pressure-sensitive sensor according to claim 1, wherein the pre-deformed portion is made of a foam having one void or a large number of voids. . 4. A window frame (3) for defining an opening (3a) of a window, and a moving body (2) for opening and closing the opening (3a).
A weather strip in which a pressure-sensitive sensor (4) for detecting an external force acting on the window frame (3) by being elastically deformed is buried, and the pressure-sensitive sensor (4) is When the opening (3a) is closed by the moving body (2) on the side opposite to the moving body (2) with the interposed therebetween, by elastically deforming before the pressure-sensitive sensor (4), A weather strip comprising a deformed portion (51) for displacing the pressure-sensitive sensor (4) to a side opposite to the moving body (2). 5. The weatherstrip according to claim 4, wherein the pre-deformed portion (51) is formed of a foam having one void or a plurality of voids.