JPH1136701A - Foreign object detection element for car windows - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reliably detect even a slight pressing force of a foreign object in a vehicle window foreign object detecting element. SOLUTION: A foreign object detecting element 1 for a vehicle window is composed of a hollow buckled body and at least two contacts (float contact type compression switch) which can be freely separated and connected in a direction in which a pressing force is applied in the crushed body. And is configured. Due to the buckling deformation of the buckled body, the pressure applied to the displacement of the foreign substance does not increase exponentially as compared with the case of using a pressure-sensitive rubber type foreign substance detection element as in the conventional example, Even with a small pressing force, the buckled body is easily deformed, the contacts can be reliably connected, and the detection accuracy of foreign matter trapping can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle window foreign matter detecting element for preventing pinching in an automatic window opening / closing mechanism of a vehicle.

[0002]

2. Description of the Related Art An automatic window opening / closing mechanism for automatically opening / closing an opening / closing member such as a window glass provided on a window frame of a vehicle door or roof in response to a predetermined operation input. In the outer peripheral part of the opening and closing member facing the peripheral part and the inner peripheral part,
2. Description of the Related Art There is known an anti-jamming device for a vehicle window in which a foreign object detecting element 100 of a pressure-sensitive rubber type as shown in FIG.

As shown in FIG. 10, a foreign substance detecting element 100 used in this anti-jamming device is formed by diffusing conductive fine powder such as carbon into rubber, which is an elastic body, to form a sheet-shaped pressure-sensitive rubber 10.
1 is formed, electrodes 102 and 103 are respectively brought into close contact with both surfaces of the pressure-sensitive rubber 101, and are housed in a rubber-like case 104 in a close contact manner. , 103 has an infinite value, but the case 104 and the electrode 103 in close contact with it.
When pressure is applied to the pressure-sensitive rubber 101 via the pressure-sensitive rubber, the pressure-sensitive rubber 101 has a property of becoming a conductor having a resistance value of, for example, about 10 Ω / cm. Utilizing such a property, foreign matter can be removed from the case 104 even though the window is not fully closed.
When the contact is made, the entrapment of a foreign object is detected by detecting a potential difference or a change in current between the electrodes 102 and 103.

[0004]

However, in the case of the foreign object detecting element 100 utilizing the stress caused by the compression of the pressure-sensitive rubber 101 as described above, the repulsive force increases exponentially as the pressure-sensitive rubber 101 is compressed. . Therefore, in order to reliably detect even a slight pressure due to foreign matter, the sheet-shaped pressure-sensitive rubber 101 may be formed thin, or the amount of diffusion of conductive fine powder such as carbon contained in the pressure-sensitive rubber 101 may be set to a large value. For example, the resistance value of the pressure-sensitive rubber 101 must be set as low as possible. However, if the resistance value of the pressure-sensitive rubber 101 is set to be low, the influence of noise is strongly exerted, so that the possibility of erroneous determination increases, and the detection accuracy may decrease.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle window foreign object detecting element capable of reliably detecting even a slight pressure of a foreign object without lowering detection accuracy.

[0006]

The technical means for achieving the above object is to provide an automatic opening / closing member which can be automatically opened / closed in a window frame of a vehicle door or a roof.
When any foreign matter is caught between the opening / closing member and the window frame portion, the window frame portion or its vicinity or the vicinity thereof is detected so as to detect the foreign material being caught based on the pressing force from the foreign material. A foreign matter detecting element for a vehicle window attached to an opening / closing member, which has elasticity, is displaced by receiving a pressing force from the foreign matter, and is buckled and deformed when the pressing force exceeds a predetermined limit value. When the buckling body undergoes buckling deformation, a hollow buckled body in which the displacement is performed with a small pressing force, and the buckling body can be freely separated and contacted in the direction in which the pressing force is applied in the buckled body. And at least two contacts (float contact type compression switches) that come into contact. Due to such buckling deformation of the buckled body, the buckled body is easily deformed even with a small pressing force, and the contacts are securely connected.

Here, the at least two contacts are separated from each other when the buckled body is in a natural state, and are arranged so as to contact each other when the buckled body undergoes buckling deformation due to the pressing force. It is a normally open contact. Thereby, even when the buckled body is deteriorated due to aging or the like and the positional relationship between the contacts in its natural state is changed, the contacts are securely connected when the pressing force is applied. Durability can be improved compared to normally closed contacts.

Here, as the buckled body, for example, an elastic material formed in a hollow substantially bowl shape is used.

Alternatively, as the buckled body, for example,
An elastic member formed in a hollow substantially semi-cylindrical shape is used.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A foreign object detecting element according to one embodiment of the present invention utilizes the buckling characteristic of an elastic body to ensure that an extremely small pressure is applied when a pressure exceeding a predetermined level is applied. This eliminates the need to consider the influence of noise as in the conventional example. Here, FIG.
FIG. 2 is an overall schematic view of an automatic window opening / closing mechanism in which an anti-jamming device including a foreign object detecting element according to one embodiment of the present invention is incorporated;
Is a block diagram of the same, FIG. 3 is a perspective view showing a configuration of the foreign substance detecting element, and FIG. 4 is a sectional view of the foreign substance detecting element.

An automatic window opening / closing mechanism incorporating a pinch prevention device to which the foreign object detecting element 1 according to the present embodiment is applied is shown in FIG.
As shown in FIG. 2 and FIG. 2, a window glass (opening / closing member) 7 provided on the window frame 5 of the door 3 so as to be openable and closable,
And an opening / closing mechanism 11 for opening and closing the window glass 7 based on the power of the motor 9, and operation switches 13 and 15 for receiving operation inputs for instructing an opening operation and a closing operation of the window glass 7.
And the operation switch 1 while judging the presence or absence of a foreign substance based on the foreign substance detecting element 1 and a detection signal from the foreign substance detecting element 1.
The control unit 19 controls the drive of the motor 9 through the drive circuit 17 in accordance with the operation input input through the control units 3 and 15 and opens and closes the window glass 7. Among them, a foreign object detecting element 1 and a later-described pinch determination unit 19 included in the control unit 19
a constitutes an anti-jamming device.

The foreign matter detecting element 1 is a compression switch of a so-called float contact type as shown in FIGS. 3 to 5 and has elasticity and is provided when the pressure applied in the vertical direction reaches a predetermined limit value. A buckling body 21 having a hollow and open top surface which is caused to deform in the lateral direction, and the buckling body 21
A substrate 22 fixed to the open upper surface of the substrate, first and second contacts 23 and 24 spaced apart from each other on the lower surface of the substrate 22 and projecting into the buckled body 21; And a float contact 25 inscribed on the bottom surface of the buckled body 21 so as to separate from and contact the second contacts 23 and 24. Here, the buckling member 21 is formed of an elastic material such as rubber in a substantially bowl shape. The buckling member 21 absorbs pressure from a foreign substance as upward displacement motion at the bottom end of the buckling member 21. Abutment body 26 is formed integrally. Such foreign matter detecting element 1
When the pressure F is applied to the contact body 26 from below as shown by the broken line in FIG.
The contact body 26 (the bottom end of the buckled body 21) is displaced upward in accordance with the applied pressure F until the displacement δ reaches the predetermined displacement amount δa. , The side of the buckling body 21 buckles, and the contact body 26
(The bottom end of the buckled body 21) is displaced upward,
As a result, the float contact 25 is connected to the first and second contacts 2.
3 and 24 can be easily contacted. The relationship between the displacement δ of the contact body 26 and the applied pressure F is as shown in FIG.

Here, as shown in FIG. 2, the first contact 23 of the foreign matter detecting element 1 is grounded. A battery voltage (+ B) is applied to the second contact 24,
From the foreign object detecting element 1 to the later-described pinch determination unit 1 of the control unit 19
9a, the signal level of the signal input to the float contact 2
5 is switched from a high level to a low level in accordance with the conduction of the first and second contacts 23 and 24 via the switch 5.

The foreign object detecting element 1 is mounted in a vehicle by fixing the upper surface of a substrate 22 on which the first and second contacts 23 and 24 and the buckling member 21 are mounted at a predetermined position for detecting a pinch. Installed. Specifically, FIG.
As shown in FIG. 2, the foreign object detecting element 1 is located at the entrance 31 of the door 3 and faces the upper end portion 7a of the window glass 7 so that the foreign substance detecting element 1 has the innermost member 35 provided on the vehicle body member 33 near the window frame 5. At the lower end 31a, a plurality of locations (see FIG. 1) in the entire area along the window frame 5 (weather strip 37) of the door 3
Are arranged in an array. In FIG. 2, only one foreign substance detecting element 1 is shown for simplicity, but actually, a plurality of foreign substance detecting elements 1 are connected in parallel, and at least one of the foreign substance detecting elements 1 is connected. The second contact 24 is switched from a high level to a low level when only one of them is closed.

In the present embodiment, the foreign object detecting element 1 is provided on the interior member 35 provided on the vehicle body. For example, the weather strip 3 provided on the window frame 5 of the door 3 is provided.
7, a groove 37a into which the end 7a of the window glass 7 fits.
At both ends of the tops 37b and 37c.

Next, the opening / closing mechanism 11 will be described in detail.
As shown in FIG. 1, a rail 11a extends vertically in the door 3, and a slider 11b is slidably held in the rail 11a in the vertical direction. A wire 11c is connected to the slider 11b. This wire 11c is a rail 11a
The slider 11b is wound around a pulley 11d disposed at the upper and lower ends thereof and connected to a driving unit 11e including a motor 9 and the like. When the motor 9 is driven, the slider 11b is moved up and down via a wire 11c. Has become. This slider 11b
The lower end of the window glass 7 is fixed to the
The window space formed by the window frame portion 5 is opened and closed when it is moved up and down together with b.

One operation switch 13 is, as shown in FIG.
The other operation switch 15 is for instructing the opening operation of the window glass 7, and the other operation switch 15 is for instructing the closing operation of the window glass 7.
While the predetermined switch operation such as the pressing operation is continuously performed, the opening operation or the closing operation of the window glass 7 is performed.

The controller 19 includes a pinch judging section 19a for judging the presence or absence of pinching based on a signal from the foreign object detecting element 1.
And a command section 19b for controlling the drive of the motor 9 through the drive circuit 17 based on the input signals from the operation switches 13 and 15 to open and close the window glass 7. When a signal instructing the closing operation of the window glass 7 is input from the operation switch 15, the pinch determination unit 19 a starts the determination operation in response to the signal, and the pinch determination unit 19 a receives the signal from the foreign matter detection element 1. When the signal is switched from the high level to the low level and pinching occurs, the command unit 19b is instructed to stop the closing operation of the window glass 7.

Next, the operation of detecting foreign matter in the foreign matter detecting element 1 having the above configuration will be described.

First, since the buckled body 21 of the foreign matter detecting element 1 is held in a substantially bowl shape as shown in FIGS. 3 and 4 in a natural state, unless the foreign matter comes into contact with the contact body 26, the buckled body 21 is buckled. The shape of the body 21 is held substantially in the shape of a bowl, so that the float contact 25
And the second contact points 23 and 24. For this reason,
As shown in FIG. 2, the second contact 24 is not connected to the first contact 23 that is grounded, and is kept at the battery voltage (+ B). Therefore, a high signal is given from the foreign object detection element 1 to the pinch determination section 19a of the control section 19. The pinch determination unit 19a can detect that no foreign object is pinched by detecting the high signal.

On the other hand, foreign matter is detected by the contact member 26 of the foreign matter detecting element 1.
5, the pressure F is applied upward to the contact body 26 as shown in FIG. 5, and the contact body 26 is displaced upward. Here, as shown in FIG. 6, until the displacement δ of the contact body 26 reaches the predetermined displacement amount δa, the contact body 26 (the bottom end of the buckled body 21) is displaced upward according to the applied pressure F. However, after the displacement δ reaches the predetermined displacement amount δa, the side surface of the buckled body 21 buckles, and when the displacement is slightly smaller than δb in FIG. 2
1 is displaced upward. as a result,
The float contact 25 can be easily brought into contact with the first and second contacts 23 and 24.

In this way, when the foreign matter is caught, even if the pressure F is small, the float contact 2
2 contacts the first and second contacts 23 and 24 almost certainly, so that the second contact 24 is connected to the ground via the float contact 25 as shown in FIG.
Connected to. For this reason, the foreign matter detecting element 1 to the control unit 1
9, the low signal is given to the pinch determination unit 19a. The pinch determination section 19a can detect pinch of a foreign object by detecting the low signal.

Next, the overall operation of the automatic window opening / closing mechanism using the foreign matter detecting element 1 will be described with reference to the flowchart of FIG.

First, in step S1 in FIG. 8, when one of the operation switches 13 and 15 is operated, and there is an operation input for opening or closing the window glass 7, the operation proceeds to step S2. S
It is determined whether or not the operation input input in step 1 indicates a closing operation of the window glass 7. If the determination result is affirmative, the window glass 7 is determined in step S3.
Is started, and the judging operation by the pinch judging unit 19a is started.

In step S5, a pinch determination is performed by the pinch determination section 19a based on the detection operation of the foreign substance detection element 1 as described above, and it is determined whether the pinch by the foreign substance has occurred. You. Here, when it is determined that the entrapment has occurred, the entrapment determination unit 19a sends the instruction unit 1
A closing operation stop command is output to 9b, and the process proceeds to step S6, where the closing operation is stopped. Although not shown in FIG. 8, after the closing operation is stopped, the opening operation control is further performed for a predetermined distance or until the fully opened state.

On the other hand, if it is determined in step S5 that no foreign matter has been caught, then step S5 is executed.
At 7, it is determined whether or not the switch operation with the operation switch 15 is continued. If the switch operation of the operation switch 15 has not been continued, the process proceeds to step S6, and the closing operation is stopped. On the other hand, if the switch operation of the operation switch 15 is continued in step S7, by detecting an increase in the current value of the motor 9 due to an increase in the load when fully closed in step S8,
It is determined whether the window glass 7 is completely closed. If it is determined that the shutter is completely closed, the process proceeds to step S6, and the closing operation is stopped. On the other hand, if it is determined in step S8 that the shutter is not fully closed, the above-described step S8 is performed.
The operations of 5, S7 and S8 are repeated.

On the other hand, if the result of the determination is negative in step S2, that is, if it is determined that the opening operation has been instructed, the opening operation of the window glass 7 is started in step S4. . Then, in step S9, it is determined whether or not the switch operation on the operation switch 13 is continued. If it is determined that the switch operation is not continued, the process proceeds to step S6, and the opening operation is stopped. On the other hand, if it is determined in step S9 that the window glass 7 has been fully opened, by detecting an increase in the current value of the motor 9 due to an increase in the load when fully opened in step S10, it is determined whether the window glass 7 has been fully opened. Is determined.
If it is determined in step S10 that the door has been fully opened, the process proceeds to step S6, and the opening operation is stopped.
On the other hand, when it is determined that the window is not fully opened, the process returns to step S9, and steps S9 and S10 are repeated until the switch operation on the operation switch 13 is canceled or the window glass 7 is fully opened.

As described above, when the window is closed, the foreign object detecting element 1 detects whether or not a foreign object is caught, and if there is, the window closing operation is immediately stopped, or Can perform the opening operation automatically or manually.

Since the element utilizing the buckling characteristic of the elastic body is used as the foreign substance detecting element 1, a pressure sensitive rubber type foreign substance detecting element (reference numeral 10 in FIG. 10) as in the conventional example is used.
The pressure F applied to the displacement δ of the foreign matter does not increase exponentially as compared with the case where 0) is used. Therefore, even small pressures can be reliably detected,
It is possible to improve the detection accuracy of foreign matter trapping.

Further, since the foreign object is determined based on the on / off operation (binary operation) of the float contact type compression switch as the foreign object detecting element 1, a change in the resistance value is detected. Can be accurately and easily made. In addition, the float contact type compression switch has a normally open structure in which the float contact 25 and the first and second contacts 23 and 24 are separated in a natural state.
Even when the buckled body 21 deteriorates due to aging or the like and the positional relationship between the contacts in its natural state changes, the contacts are securely connected when the pressing force is applied. Therefore, durability against aging and the like can be improved as compared with a switch having a normally closed structure.

In the above embodiment, the foreign matter detecting element 1
Although the buckled body 21 is formed in a substantially bowl shape, the shape of the buckled body 21 is not limited to this. For example, the buckled body 21 may be formed in a hollow substantially semi-cylindrical shape as shown in FIG. In this case, since the cross-section of the hollow substantially semi-cylindrical buckled body 21 is similar to the substantially bowl-shaped cross-sectional shape as in the above-described embodiment, the buckling operation of the buckled body 21 is the same as in the above-described embodiment. (FIG. 5).

In the above embodiment, the foreign matter detecting element 1
Is attached to the interior member 35 near the window frame 5, but may be attached to the window glass (opening / closing member) 7 side.

Further, in the above embodiment, the three contacts are connected by the buckling deformation of the buckled body 21. However, only the two contacts on the fixed side and the floating side are connected. It goes without saying that there is no problem.

[0034]

As described above, claims 1 and 3 of the present invention.
According to 4, the foreign body detecting element for a vehicle window is composed of a hollow buckled body and at least two contacts (float contact type compression switch) which can be freely separated and connected in a direction in which a pressing force is applied in the buckled body. Because of the buckling deformation of the buckled body, the pressure applied to the displacement of the foreign substance is lower than when using a pressure-sensitive rubber-type foreign substance detecting element as in the conventional example. Does not increase exponentially. Therefore, even with a small pressing force, the buckled body is easily deformed, the contacts can be reliably connected to each other, and the detection accuracy of the foreign substance trapping can be improved. Further, since the foreign object is determined based on the opening / closing operation (binary operation) of at least two contacts, the determination can be made more accurately and easily than in the conventional example in which the change in the resistance value is detected. It can be carried out.

According to the second aspect of the present invention, since the at least two contacts are normally open contacts, the buckled body deteriorates due to aging or the like and changes in the positional relationship between the contacts in its natural state. Even when there is a contact, the contacts are securely connected to each other when the pressing force is applied, and therefore, the durability can be improved as compared with the normally closed contacts.

[Brief description of the drawings]

FIG. 1 is an overall schematic view of an automatic window opening / closing mechanism in which an anti-jamming device including a foreign object detecting element according to an embodiment of the present invention is incorporated.

FIG. 2 is an overall block diagram of an automatic window opening / closing mechanism in which a pinch prevention device to which the foreign object detection element according to one embodiment of the present invention is applied is incorporated.

FIG. 3 is a perspective view showing a foreign object detecting element according to one embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a foreign object detecting element in a natural state according to one embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a buckled foreign object detecting element according to an embodiment of the present invention.

FIG. 6 is a diagram showing a relationship between a displacement δ of a contact body and an applied pressure F.

FIG. 7 is a cross-sectional view showing a state in which a foreign object detecting element according to one embodiment of the present invention is mounted on a vehicle body.

FIG. 8 is a flowchart showing the operation of the anti-jamming device including the foreign object detecting element according to one embodiment of the present invention.

FIG. 9 is a perspective view showing a foreign object detecting element according to another embodiment of the present invention.

FIG. 10 is a perspective view showing a conventional foreign matter detection element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foreign substance detection element for vehicle windows 3 Door 5 Window frame part 7 Window glass 9 Motor 11 Opening / closing mechanism 13, 15 Operation switch 17 Drive circuit 19 Control part 21 Buckling body 22 Substrate 23 First contact 24 Second contact 25 Float contact 26 Abutment

Claims (4)

[Claims] 1. During a closing operation of an opening / closing member which can be automatically opened / closed in a window frame such as a door or a roof of a vehicle, any foreign matter between the opening / closing member and the window frame. A vehicle window foreign matter detection element attached to the window frame or its vicinity or to the opening / closing member so as to detect the foreign matter being caught based on a pressing force from the foreign matter when the foreign matter is caught. A hollow buckling member which is displaced in response to a pressing force from the foreign matter and buckles and deforms when the pressing force exceeds a predetermined limit value, and the displacement is performed with a pressing force smaller than the limit value. A body, and at least two contact points that are detachable in a direction in which the pressing force is applied in the buckled body and come into contact when the buckled body undergoes buckling deformation. Foreign object detection element for car windows. 2. The at least two contact points are separated from each other when the buckled body is in a natural state, and are arranged to be in contact with each other when the buckled body undergoes buckling deformation due to the pressing force. The foreign matter detecting element for a vehicle window according to claim 1, wherein the foreign matter detecting element is a normally open contact. 3. The foreign matter detecting element for a vehicle window according to claim 1, wherein the buckling member is formed by forming an elastic material into a substantially bowl-like hollow shape. 4. The foreign matter detecting element for a vehicle window according to claim 1, wherein the buckling member is formed by forming an elastic material in a substantially hollow hollow shape.