JP3855374B2 - Cord switch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cord switch that is in a conductive state when an external force of a predetermined level or more is applied from a direction intersecting a longitudinal direction. When a foreign object is caught between a window glass and a window frame, the power window It is suitable for use in an external force sensor for a window frame of a power window with a pinching prevention mechanism that prevents a foreign object from being pinched by reversing the motor that drives the motor.
[0002]
[Prior art]
For example, in a cord switch described in Japanese Patent Application Laid-Open No. 59-63620, a pair of electrode members formed in a band shape are arranged with a predetermined interval.
[0003]
[Problems to be solved by the invention]
By the way, the pinching external force direction in the power window also changes depending on the relative positional relationship between the window frame and the window glass and the cord switch, but is rarely applied to the cord switch (both electrode members) from the vertical direction. An external force often acts from the side.
[0004]
On the other hand, the code switch described in the above publication detects the external force (foreign object pinching) by arranging a pair of electrode members facing each other and deforming the electrode members with an external force so that both electrode members come into contact with each other. Therefore, when an external force from an oblique lateral direction acts on the electrode member, an external force component acting at right angles to the electrode member is reduced, and a force for deforming the electrode member is reduced.
[0005]
For this reason, in the cord switch described in the above publication, depending on the direction in which the external force is applied, there is a case where both electrode members do not come into contact with each other. In this case, there is a problem that foreign object pinching cannot be detected.
To solve this problem, a means of reducing the rigidity of the electrode member is conceivable. However, with this means, both electrode members come into contact with each other with a small external force, so that the motor does not actually get caught. There is a high possibility that the problem of inversion will occur.
[0006]
Therefore, the power window with a pinching prevention mechanism using the cord switch described in the above publication cannot reliably prevent the foreign object from being caught.
An object of this invention is to provide the cord switch which can detect an external force reliably with respect to the action direction of a wide external force in view of the said point.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention uses the following technical means. According to the first to third aspects of the present invention, the cord switch is in a conductive state when an external force of a predetermined level or more is applied from the direction intersecting the longitudinal direction, and is a pair of band-shaped electrode members disposed opposite to each other. First, second and third insulating members (44a to 44c) extending in parallel to the longitudinal direction of the pair of electrode members (41, 42) with a predetermined interval between them (41, 42). By interposing, the pair of electrodes at the part of the pair of electrode members (41, 42) between the first insulating member (44a) and the second insulating member (44b) The pair of contacts between the first contact portion (40a), which is brought into conduction when the members are deformed, and between the second insulating member (44b) and the third insulating member (44c). The pair of electrode members (41, 42) A switch part (40) having a second contact part (40b) that is brought into a conductive state by contacting both by deformation of the pole member; and one space into which the switch part (40) is inserted, A tube (5) made of an elastically deformable insulating material that covers the outside of the both contact portions (40a, 40b), and the tube (5) is the first contact portion (of the inner wall of the space). 40a), the first contact portion (46a) that is formed at a portion corresponding to the electrode member and protrudes toward the first contact portion (40a), and the second contact portion (40b) among the inner walls of the space. ) And a second projecting portion (46b) projecting toward the second contact portion (40b) .
[0008]
As a result, the cord switch according to the present invention detects an external force at the plurality of contact portions (40a, 40b), and thus can detect the external force with respect to a wide direction of the external force.
Moreover, since the 1st, 2nd protrusion part (46a, 46b) is formed in the site | part corresponding to the electrode member of each contact part (40a, 40b), each protrusion part is provided in each contact part (40a, 40b). External force will act via the contact part of (46a, 46b) and each contact part (40a, 40b).
[0009]
Therefore, external force acts on each contact portion (40a, 40b) in a concentrated manner on the contact portion, so that the electrode member can be deformed to be in a conductive state without reducing the rigidity of the electrode member. The above problems can be prevented.
As described above, according to the present invention, the external force can be reliably detected with respect to the direction of the wide external force, so if the cord switch according to the present invention is used for a power window with a pinching prevention mechanism, It is possible to reliably prevent the foreign object from being caught.
[0010]
The invention according to claim 2 is characterized in that the tips of both projecting portions (46a, 46b) are formed in a curved surface.
Thereby, each protrusion part (46a, 46b) and each contact part (), preventing the area of the contact part of each protrusion part (46a, 46b) and each contact part (40a, 40b) becoming large too much. 40a, 40b) can be increased in area. Therefore, it is possible to detect the external force with respect to the acting direction of a wide external force without reducing the rigidity of the electrode member.
[0011]
By the way, since external force is transmitted to each contact part (40a, 40b) via each protrusion part (46a, 46b), in order to transmit external force to a contact part (40a, 40b) with respect to the acting direction of a wide external force. Of the protrusions (46a, 46b), it is preferable that the area of the part (hereinafter referred to as a pressure receiving part) located on the side where the external force acts is larger.
In view of this, the invention according to claim 3 is characterized in that both projecting portions (46a, 46b) are formed so that the cross-sectional area becomes larger toward the base side.
[0012]
Thereby, since the area of the base side of both protrusion part (46a, 46b) which is a pressure receiving part becomes large, external force can be transmitted to a contact part (40a, 40b) with respect to the acting direction of a wide external force.
In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description later mentioned.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
This embodiment is applied to a vehicle-powered window opening / closing device (hereinafter abbreviated as a power window) having a pinch prevention mechanism for a cord switch according to the present invention, and FIG. 1 shows a power with a pinch prevention mechanism. It is a schematic diagram of a window.
In FIG. 1, reference numeral 1 denotes a drive motor that drives the window glass (window body) 2 to open and close the window opening 3c, and 3 denotes a window frame that partitions the window opening 3c. A cord switch 4 for detecting an external force acting on the window frame 3 is disposed from the front side portion 3a to the upper side portion 3b of the window frame 3 at the indoor peripheral edge of the window frame 3. As shown in FIG. 2, the switch part (contact part) 40 of 4 is inserted into a rubber weather strip 5 that seals the gap between the window glass 2 and the window frame 3. The structure of the code switch 4 will be described later.
[0014]
The code switch 4 generates a signal 4a when an external force of a predetermined value or more is applied. When the signal 4a is generated, the signal 4a is input to the control device 6. And if the signal 4a is input, the control apparatus 6 will issue the inversion signal 6a so that it may invert in the opening direction of the window glass 2 with respect to the drive motor 1 (refer FIG. 1).
Next, the cord switch 4 will be described.
[0015]
FIG. 3 is an enlarged view of the switch portion 40 of the cord switch 4. Reference numerals 41 and 42 denote strip-shaped first and second electrode members made of a thin metal plate. Both the electrode members 41 and 42 are shown in FIG. As described above, they are arranged to face each other with predetermined insulating gaps (gap) 43a to 43c interposed therebetween. The insulating gap 43A～43 c, as shown in FIG. 3, are formed by a plurality of insulating members 44a~44d interposed between both the electrode members 41 and 42, these insulating members 44a~44d are each The electrode members 41 and 42 are formed to extend in parallel to the longitudinal direction with a predetermined interval. In the present embodiment, the insulating members 44 a to 44 d are formed by applying an insulating material to the first electrode member 41.
[0016]
For this reason, since the switch part 40 becomes a structure divided into three parallel parts (switch part) by the insulating members 44a to 44d, hereinafter, the parts of the electrode members 41 and 42 between the insulating members 44a and 44b. Is called the first switch part 40a, the part of the electrode members 41, 42 between the insulating members 44b, 44c is called the second switch part 40b, and the part of the electrode members 41, 42 between the insulating members 44c, 44d is the first switch part 40a. This is referred to as a three-switch unit 40c (see FIG. 2).
[0017]
Further, the second electrode member 42 has a slit 42a extending in a direction perpendicular to the longitudinal direction (hereinafter, this direction is referred to as a width direction) and penetrating in the thickness direction of the second electrode member 42 in the width direction. A plurality are formed in parallel. Incidentally, the slit 42a has a bending rigidity (bending rigidity) when the second electrode member 42 is bent and deformed toward the first electrode member 41 by changing its width dimension (longitudinal dimension of the second electrode member 42). ).
[0018]
Incidentally, reference numeral 45 denotes a resin protective film that is in close contact with both electrode members 41, 42 and covers both electrode members 41, 42.
Further, on the inner wall of the weather strip (tube) 5 space in which the switch unit 40 is inserted, the switch unit side 40a to 40c is located in a portion corresponding to the switch unit 40a to 40c on the second electrode member 42 side. The 1st-3rd projection parts 46a-46c which protrude toward are formed. And these 1st-3rd projection parts 46a-46c are formed so that the cross-sectional area may become large, so that the front-end | tip (site | part which contacts the switch part 40) may be curved shape, and it goes to the root side.
[0019]
With the structure described above, as shown in FIG. 2, when the external force F is applied from the outside of the weather strip 5, the cord switch 4 comes into contact with any one of the switch portions, The two-electrode member 42 is bent and deformed toward the first electrode member 41 side. As a result, both electrode members 41 and 42 come into contact with each other and become conductive, and a signal 4 a is emitted toward the control device 6.
[0020]
Next, features of the present embodiment will be described. In the cord switch 4 according to the present embodiment, three protrusions formed with three switch portions 40a~40c formed in parallel to each other, the portion corresponding to the second electrode member 42 side of the switch section 40a~40c 46a to 46c, since the external force is detected in the plurality of switch portions 40a to 40c, the external force can be detected with respect to the direction in which a wide external force is applied.
[0021]
Moreover, since each protrusion part 46a-46c is formed in the site | part corresponding to each switch part 40a-40c, each switch part 40a-40c has each protrusion part 46a-46c and each switch part 40a-40c. An external force will act via a contact site.
Therefore, since external force acts on each switch part 40a-40c intensively to a contact part, without making the rigidity of the 2nd electrode member 42 too small, the 2nd electrode member 42 is changed and it is in a conduction state. can do. As a result, it is possible to prevent a problem that the drive motor 1 is reversed although no foreign object is actually caught.
[0022]
As described above, according to the cord switch 4 according to the present embodiment, the external force can be reliably detected with respect to the acting direction of the wide external force, so that the foreign object is reliably prevented from being caught in the power window. be able to.
In addition, since the tips of the protrusions 46a to 46c are formed in a substantially curved shape, it is possible to prevent the area of the contact portion between the protrusions 46a to 46c and the switch parts 40a to 40c from becoming excessively large. However, the area of the contact part which each protrusion part 46a-46c and each switch part 40a-40c can contact can be expanded. Therefore, it is possible to detect the external force with respect to the acting direction of a wide external force without excessively reducing the rigidity of the second electrode member 42.
[0023]
Moreover, since each protrusion part 46a-46c is formed so that a cross-sectional area may become so large that it goes to the base side, as above-mentioned, the area of the base side of each protrusion part 46a-46c which is a pressure receiving part is large. The external force can be transmitted to the switch portions 40a to 40c with respect to the acting direction of a wide external force.
By the way, in the above-mentioned embodiment, although each switch part 40a-40c was comprised by partitioning the switch part 40 comprised by both the electrode members 41 and 42 with insulating members 44a-44d, the cord switch 4 which concerns on this invention However, the present invention is not limited to this, and the switch units 40 a to 40 c may be configured separately and integrated by the protective film 45.
[0024]
Moreover, in the above-mentioned embodiment, although the three switch parts 40a-40c were comprised, this invention should just have at least 2 switch part.
In the above-described embodiment, the weather strip 5 and the tube made of an elastically deformable insulating material that covers the outside of each of the switch portions 40a to 40c are integrated. However, the tube and the weather strip 5 are separated. It may form and each protrusion part 46a-46c may be formed in the inner wall of the said tube.
[0025]
In the above-described embodiment, the slit 42a is formed in the second electrode member 42. However, it may be formed in the first electrode member 41, and the slit 42a may be eliminated.
In the above-described embodiment, both electrode members 41 and 42 are made of metal, but are made of conductive rubber or resin, or a metal foil is attached to the inner wall of a tube made of an elastically deformable insulating material. Or you may comprise both the electrode members 41 and 42 by apply | coating a metal powder.
[0026]
In the above-described embodiment, the dimensions in the width direction of the switch portions 40a to 40c are substantially the same as shown in FIG. 3, but the present invention is not limited to this, and the switch portions 40a are not limited thereto. The dimensions in the width direction of ˜40c are appropriately changed depending on the relative positional relationship between the window frame 3 and the window glass 2 and the cord switch 4.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a power window.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
FIG. 3 is an enlarged view of a switch portion of a cord switch.
[Explanation of symbols]
4 ... cord switch, 41 ... first electrode member, 42 ... second electrode member,
43a-43c ... Insulation gap (gap),
44a ... 1st switch part (1st contact part),
44b ... 2nd switch part (2nd contact part), 44c ... 3rd switch part,
46a ... 1st protrusion part, 46b ... 2nd protrusion part, 46c ... 3rd protrusion part.

Claims (3)

A cord switch that becomes conductive when an external force of a predetermined level or more is applied from a direction intersecting the longitudinal direction,
First extending parallel to the longitudinal direction of the pair of electrode members to each other a predetermined distance between a pair countercurrent arrangement is strip-shaped pair of electrode members (41, 42) (41, 42), By interposing the second and third insulating members (44a to 44c), the pair of electrode members (41, 41) between the first insulating member (44a) and the second insulating member (44b). said first contact portion that Do and both in contact conductive state by site is the pair of electrode members of the site to deformation of 42) and (40a), said second insulating member and (44b) first 3 of insulating members said pair of electrode members (41, 42) portion to the second that Do and both in contact conductive state by deforming said pair of electrode members at the site of between (44c) A switch part (40) having a contact part (40b) ;
The switch unit (40) has one space is inserted, the cover outer surfaces of the contact portions (40a, 40b), and a tube (5) made of elastically deformable insulating material,
The said tube (5) is formed in the site | part corresponding to the electrode member of the said 1st contact part (40a) among the inner walls of the said space, and protrudes toward the said 1st contact part (40a) side. Part (46a) and a second projecting portion that is formed in a portion of the inner wall of the space corresponding to the electrode member of the second contact portion (40b) and projects toward the second contact portion (40b). (46b) and cord switch, characterized in that it comprises a. The cord switch according to claim 1, wherein tip ends of the projecting portions (46a, 46b) are formed in a curved shape. The cord switch according to claim 1 or 2, wherein the projecting portions (46a, 46b) are formed so that a cross-sectional area increases toward a base side thereof.

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