WO2010067747A1

WO2010067747A1 - Apparatus for detecting breakage of openable window glass

Info

Publication number: WO2010067747A1
Application number: PCT/JP2009/070324
Authority: WO
Inventors: 恒雄鈴木; 博志長屋; 雅之堀場; 浩司大永; 尚宏中島
Original assignee: 株式会社豊田自動織機
Priority date: 2008-12-09
Filing date: 2009-12-03
Publication date: 2010-06-17
Also published as: JPWO2010067747A1; TW201027071A

Abstract

Provided is an apparatus for detecting breakage of a window glass, wherein breakage of a window glass can be detected even when the window glass is not at the fully closed position. A window glass which can open/close an opening section of a vehicle is provided with a magnet. A magnetic field generated by the magnet is detected by the magnetic sensor. Drop of the magnet due to breakage of the window glass is detected based on the detected magnetic field. A core material composed of a magnetic material is magnetically coupled with the magnetic sensor, and has an upright section extending in the vertical direction.

Description

Open / close-type window glass breakage detector

The present invention relates to an open / close type window glass breakage detection device.

Patent Document 1 discloses a device that detects a break in a window glass of a vehicle to prevent theft. 23, when the window glass 200 is in a fully closed position where the window opening is closed, the carrier plate 211 of the cable-type window regulator 210 that supports the window glass 200 is attached to the window glass 200 as shown in FIG. A compression coil spring 220 that biases in the closing direction is provided. When the window glass 200 is broken, the restriction by the stopper pin 205 provided on the window glass 200 and the locking part 206 on the vehicle body side is released, and the carrier plate 211 is closed by the compression coil spring 220 from the fully closed position of the window glass 200. Move to the side. The limit switch 230 detects the breakage of the window glass 200 by detecting the movement of the carrier plate 211.

Japanese Patent Laid-Open No. 11-321564

When the window glass 200 is not in the fully closed position, that is, when the window glass 200 is slightly opened for ventilation, the detection device detects that the window glass 200 is displaced from the fully closed position to the closing side. Therefore, the breakage of the window glass 200 could not be detected.

An object of the present invention is to provide an open / close type window glass breakage detection device capable of detecting breakage of a window glass even when the window glass is not in a fully closed position.

To achieve the above object, the window glass breakage detection device according to the first aspect of the present invention includes a magnet, a magnetic detection unit, a determination unit, and a core material. The magnet is provided on a window glass capable of opening and closing a vehicle opening, and generates a certain magnetic field. The magnetic detection unit detects a magnetic field generated by the magnet. The determination unit detects breakage of the window glass based on the magnetic field detected by the magnetic detection unit. The core member is made of a magnetic material, and has at least a standing portion that is magnetically coupled to the magnetic detection portion and extends in the vertical direction.

According to the above configuration, the magnetic field detected by the magnet provided on the window glass that can freely open and close the vehicle opening is detected by the magnetic detection unit, and the determination unit detects breakage of the window glass based on the magnetic field detected by the magnetic detection unit. Is done.

Here, since the core made of a magnetic material magnetically coupled to the magnetic detection unit has at least a standing portion extending in the vertical direction, the magnetic force of the magnet can be passed through the core even when the window glass is not in the fully closed position. Is transmitted to the magnetic detection unit, and a magnetic field generated by the magnet is detected by the magnetic detection unit. Thereby, breakage of the window glass can be detected.

Preferably, the determination unit detects the fall of the magnet accompanying breakage of the window glass based on the magnetic field detected by the magnetic detection unit.
According to the above configuration, the magnetic field detected by the magnet provided on the window glass that can freely open and close the opening of the vehicle is detected by the magnetic detection unit, and the determination unit accompanies breakage of the window glass based on the magnetic field detected by the magnetic detection unit. Magnet fall is detected.

The window glass breakage detection device according to the second aspect of the present invention includes a magnet, a magnetic switch, a reverse magnetic field generating coil, a determination unit, and a core material. The magnet is provided on a window glass capable of opening and closing a vehicle opening, and generates a certain magnetic field. The magnetic switch is turned on by a magnetic field generated by the magnet. The reverse magnetic field generating coil is connected to the magnetic switch, and generates a reverse magnetic field that cancels the magnetic field of the magnet when the magnetic switch is turned on to turn off the magnetic switch. The determination unit detects breakage of the window glass based on a switching period of the magnetic switch. The core member is made of a magnetic material, and is magnetically coupled to the magnetic switch, and has at least a standing portion that is wound around the reverse magnetic field generating coil and extends in the vertical direction.

According to the above configuration, the magnetic switch is turned on by the magnetic field of the magnet provided on the window glass that can open and close the opening of the vehicle, and the reverse magnetic field that cancels the magnetic field of the magnet is generated in the reverse magnetic field generating coil when the magnetic switch is turned on. To turn off the magnetic switch. Then, breakage of the window glass is detected based on the switching period of the magnetic switch.

Here, since the core material made of a magnetic material that is magnetically coupled to the magnetic switch and wound with the reverse magnetic field generating coil has at least a standing portion extending in the vertical direction, the window glass is not in the fully closed position. Sometimes, the magnetic force of the magnet is transmitted to the magnetic switch through the core material, and a reverse magnetic field is efficiently applied to detect breakage of the window glass.

Preferably, the determination unit detects a fall of the magnet due to breakage of the window glass based on a switching period of the magnetic switch.
According to the above configuration, the magnetic switch is turned on by the magnetic field of the magnet provided on the window glass that can open and close the opening of the vehicle, and the reverse magnetic field that cancels the magnetic field of the magnet is generated in the reverse magnetic field generating coil when the magnetic switch is turned on. To turn off the magnetic switch. Based on the switching period of the magnetic switch, the determination unit detects the fall of the magnet accompanying the breakage of the window glass.

Preferably, the core material is made of a high permeability material.
Preferably, a clip for holding the window glass at an end of the window glass is further provided, and the magnet is fixed to the clip.

Preferably, the clip includes a first member and a second member. The first member and the second member are in contact with the window glass at positions shifted from each other in the plane of the window glass in a state where the window glass is arranged between them, and approach each other by their own elasticity. Is being energized.

FIG. 4 is an exploded perspective view of a right front door in a passenger car to which the window glass breakage detection apparatus according to the first to third embodiments of the present invention is applied. The schematic front view of the right front door in a passenger car. FIG. 3 is a longitudinal sectional view taken along line 3-3 in FIG. The perspective view of the window glass breakage detection apparatus which concerns on 1st Embodiment. (A) is a front view of the window glass breakage detection apparatus according to the first embodiment, and (b) is a longitudinal sectional view taken along line 5b-5b of (a). (A), (b) is a figure which shows the positional relationship of the magnet 50 and magnetic sensor 61 which concern on 1st Embodiment. The output characteristic figure of MR sensor concerning a 1st embodiment. (A), (b) is a figure which shows the positional relationship of the magnet 50 and magnetic sensor 61 which concern on 1st Embodiment. (A) is a front view of the window glass breakage detection apparatus according to the first embodiment, and (b) is a longitudinal sectional view taken along line 9b-9b of (a). (A) is a front view of the window glass breakage detection apparatus concerning a 1st embodiment, and (b) is a longitudinal section along the 10b-10b line of (a). (A) is a front view of the opening-and-closing window glass breakage detection apparatus concerning a 1st embodiment, (b) is a longitudinal section along the 11b-11b line of (a). The perspective view of the window glass breakage detection apparatus which concerns on 2nd Embodiment. (A), (b) is a figure which shows the positional relationship of the magnet 50 and MR sensor 68 which concern on 2nd Embodiment. The figure which shows the electrical constitution of the window glass breakage detection apparatus which concerns on 2nd Embodiment. (A) is a figure which shows the case where the magnet position which concerns on 2nd Embodiment is near, (b) is a figure which shows the case where the magnet position which concerns on 2nd Embodiment is far. (A) is a wave form diagram in case the magnet position which concerns on 2nd Embodiment is near, (b) is a wave form diagram in case the magnet position which concerns on 2nd Embodiment is far. (A), (b) is a figure which shows the positional relationship of the magnet 50 and MR sensor 68 which concern on 2nd Embodiment. Sectional drawing of the window glass breakage detection apparatus which concerns on 3rd Embodiment. The perspective view of the window glass breakage detection apparatus which concerns on 3rd Embodiment. Sectional drawing of the window glass breakage detection apparatus which concerns on 3rd Embodiment. (A), (b) is a perspective view of the window glass breakage detection apparatus in another example. (A), (b) is a perspective view of the window glass breakage detection apparatus in another example. The front view of the detection apparatus for demonstrating a prior art.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of a right front door of a passenger car, and FIG. 2 is a schematic front view of the right front door of the passenger car.

As shown in FIG. 1, the vehicle door 1 includes an outer panel 2 and an inner panel 3. A window glass 5 made of tempered glass is disposed between the outer panel 2 and the inner panel 3. The thickness of the window glass 5 is about 3.1 mm to 5.0 mm. A door trim 8 is attached to the inner side of the inner panel 3 of the vehicle door 1.

In the vehicle door 1, a window regulator 10 that moves the window glass 5 up and down is housed. In the present embodiment, an X-arm type window regulator is used as the window regulator 10. The inner panel 3 is provided with a door part assembly hole 3a, and a modular panel 6 is provided so as to close the door part assembly hole 3a.

The X-arm window regulator 10 is supported on the outdoor surface of the modular panel 6 via a base plate (fixed base) 11. That is, the shaft 13 of the lift arm 12 of the X arm type window regulator 10 is supported on the base plate 11 fixed to the outdoor surface of the modular panel 6. An electric drive unit 14 is fixed to the base plate 11. As shown in FIG. 2, the lift arm 12 integrally has a sector gear (driven gear) 15 centered on a shaft 13, and the electric drive unit 14 of FIG. 1 is engaged with the pinion 16 (FIG. 2). And its drive motor (not shown).

In FIG. 2, the intermediate portion of the equalizer arm 18 is pivotally attached to the intermediate portion in the length direction of the lift arm 12 by a shaft 17. Guide pieces (rollers) 19 and 20 are pivotally attached to the upper end portions (tip portions) of the lift arm 12 and the equalizer arm 18 so as to be rotatable and tiltable, respectively. Roller) 21 is pivotally attached.

The guide piece 19 of the lift arm 12 and the guide piece 20 of the equalizer arm 18 are movably fitted to the window glass bracket 22, and the guide piece 21 of the equalizer arm 18 is located on the outside of the modular panel 6 in FIG. It is movably guided to an equalizer arm bracket (posture maintenance rail) 23 fixed to the surface.

On the other hand, a window glass holder 24 is fixed to the lower edge of the window glass 5 before and after the window glass 5. The window glass holder 24 is fixed to the lower edge of the window glass 5 in advance, and the window glass 5 having the window glass holder 24 is inserted from the gap between the outer panel 2 and the inner panel 3, and the window glass bracket 22 is tightened by bolts 25. It is fixed to.

As shown in FIG. 2, a pair of front and rear glass runs 26 are erected. The glass run 26 is made of a rubber material. The window glass 5 is movably supported by a pair of front and rear glass runs 26 as rail members. That is, the front and rear end portions of the window glass 5 are guided by the glass run 26 and can move up and down.

When the pinion 16 is driven forward and backward via the electric drive unit 14 of FIG. 1, the lift arm 12 swings about the shaft 13 via the sector gear 15, and as a result, the window glass bracket 22 (window glass 5) is moved. The equalizer arm 18, the

guide pieces

19, 20, 21 and the equalizer arm bracket 23 are moved up and down while being held in a substantially horizontal state. Thus, the window glass 5 is raised and lowered, and the opening 4 of the vehicle can be freely opened and closed by the window glass 5.

Fig. 3 shows a longitudinal section along line 3-3 in Fig. 2. In FIG. 3, an open / close-type window glass breakage detection device 30 for preventing unauthorized entry is disposed inside the vehicle door 1. The breakage detection device 30 includes a clip 40, a magnet 50, a detection unit 60, a determination unit 70, and an alarm unit 80.

FIG. 4 is a perspective view of the opening / closing type window glass breakage detection device 30. FIGS. 5A and 5B show the open / close type window glass breakage detecting device 30, wherein FIG. 5A is a front view and FIG. 5B is a longitudinal sectional view taken along line 5b-5b of FIG.

In FIG. 3, the window glass 5 is disposed between the outer panel 2 and the inner panel 3 in a state of being sealed by a weather strip 7. A door trim 8 is disposed inside the inner panel 3. The clip 40 is disposed at the lower end of the window glass 5 and sandwiches the window glass 5.

As shown in FIG. 5, the clip 40 is configured by bending a single plate spring steel plate. The clip 40 includes first and

second members

41 and 42 and a bent portion (connecting portion) 43 that are opposed to each other. The first member 41 on the back side has a rectangular shape, and the second member 42 on the front side has a square shape that is narrower than the first member 41. The window glass 5 is disposed between the first member 41 on the back side and the second member 42 on the front side, and the first member 41 and the second member 42 are urged toward the window glass 5 toward each other. ing.

The bent portion 43 connects the first member 41 and the second member 42. The bent portion 43 is bent in two steps, and the width of the second-stage bent portion 43b is narrower than the thickness of the window glass 5, and the end surface of the window glass 5 is in contact with the bent portion 43a of the first step.

In FIG. 5, a rectangular through hole 44 is formed at the center of the first member 41. The second member 42 is located at a position corresponding to the through hole 44. The second member 42 is located at a location corresponding to the inside of the through hole 44 of the first member 41 as shown in FIG. 5A, and the other surface (surface 5a) as shown in FIG. 5B. ). The second member 42 is bonded to the window glass 5.

Thus, the state which the 1st member 41 and the 2nd member 42 contact in the position which shifted | deviated in the surface of the window glass 5 between the 1st member 41 and the 2nd member 42 in which the window glass 5 is arrange | positioned. Thus, they are biased in a direction approaching each other. That is, force is applied to the window glass 5 at different locations on the front surface 5a and the back surface 5b of the window glass 5. Further, the clip 40 clamps (holds) the lower end portion of the window glass 5 with a predetermined force or more.

4 and 5, a magnet (permanent magnet) 50 is fixed to the front side of the second member 42 of the clip 40. In this embodiment, a ferrite magnet is used as the magnet 50. As shown in FIG. 4, the magnet 50 is magnetized with the left half being an N pole and the right half being an S pole. As shown in FIG. 4, the magnet 50 as the magnetic field generating unit generates a constant magnetic field H1.

The detection unit 60 is fixed to the inner panel 3 as shown in FIG. Here, the vertical direction is the X direction and the horizontal direction is the Y direction. The clip 40 moves in the X direction (vertical direction), that is, falls.

FIG. 6 is a diagram illustrating the positional relationship between the magnet 50 and the magnetic sensor 61 of the detection unit 60.
As shown in FIGS. 4 and 6, the detection unit 60 includes a magnetic sensor 61 for detecting the magnetic field H <b> 1 by the magnet 50 and

core members

62 a and 62 b disposed on the left and right sides of the magnetic sensor 61. The

core materials

62a and 62b are made of a magnetic material. Specifically, the

core materials

62a and 62b are made of permalloy, which is a high magnetic permeability material. Each of the

core members

62a and 62b is made of a single bar, and includes a standing portion 63 that extends in the vertical direction and a horizontal portion 64 that extends in an L shape from the lower end of the standing portion 63 in the horizontal direction. The upper ends of the standing portions 63 of the

core members

62a and 62b are arranged at substantially the same height as the magnet 50 when the window glass 5 is fully closed (separated from the magnet 50 by a predetermined distance in the Y direction). . Further, the magnetic sensor 61 is disposed close to the front end surface of the horizontal portion 64 of the

core members

62a and 62b. Thereby, the magnetic sensor 61 as a magnetic detection part is magnetically coupled with the

core members

62a and 62b, and part of the

core members

62a and 62b extends in the vertical direction. The magnetic material (magnetic force) of the magnet 50 is collected by the

core members

62a and 62b and transmitted to the magnetic sensor 61, so that the magnetic flux density in the magnetic sensor 61 can be increased.

The magnetic sensor 61 outputs a signal corresponding to the magnetic field (magnetic strength). The magnetic sensor 61 is connected to the determination unit 70 as shown in FIG. The determination unit 70 includes an A / D converter and a microcomputer, and the microcomputer can take in a signal obtained by A / D converting the signal from the magnetic sensor 61. Moreover, since the

core materials

62a and 62b are provided with the standing part 63 extended in an up-down direction, the output Vs1 (refer FIG. 7) of the magnetic sensor 61 is set to the output Vs2 (refer FIG. 7) when there is no core material. Compared to a wide range, it can be high. As a result, the position of the magnet 50 can be detected in a wide range. That is, as shown in FIG. 8, when the window glass is not in the fully closed position and the window glass is slightly opened for ventilation, the magnet 50 is positioned slightly below, but in this case as well, the output level is high. A signal is obtained.

And the determination part 70 as a determination part of FIG. 3 detects the fall of the magnet 50 accompanying breakage of a window glass based on the magnetic field detected by the magnetic sensor 61, ie, sensor output (Vs1). In FIG. 3, an alarm unit 80 is connected to the determination unit 70.

Next, the operation of the open / close-type window glass breakage detection apparatus configured as described above, that is, the operation when the window glass 5 is broken (broken) will be described.
In normal times, the window glass 5 is fully closed or slightly opened when the occupant leaves the vehicle. The determination unit 70 detects the position of the window glass 5 from the sensor output level (Vs1) in FIG. 7, and when the window glass 5 is fully closed or slightly opened when the parking brake is operated, the glass breakage detection mode is detected. Set. On the other hand, as shown in FIG. 5, the clip 40 disposed at the end of the window glass 5 sandwiches the end of the window glass 5. Specifically, the window glass 5 is sandwiched between the first member 41 and the second member 42 by the elastic force of the clip 40 itself. Further, the magnet 50 is located in front of the detection unit 60.

From this state, if the window glass 5 is broken, its strength decreases. That is, when a part of the window glass 5 made of tempered glass is broken, as shown in FIG. 9, the window glass 5 is cracked and the strength is remarkably lowered (the glass strength is lowered when the glass is broken).

As the strength decreases, the clip 40 crushes the end (lower end) of the window glass 5 by its clamping force as shown in FIG. That is, the window glass 5 made of tempered glass is partially and completely pulverized (pulverized) by its own spring force. Thereby, as shown in FIG. 11, the clip 40 falls.

Specifically, as shown in FIG. 9, the window glass 5 is pushed by the urging force of the second member 42, and the window glass 5 comes into contact with the first member 41 of the clip 40. In this state, as shown in FIG. 10, the window glass 5 is pressed by the second member 42 in a state where the periphery of the through hole 44 is supported, and the window glass 5 in the through hole 44 is shattered into pieces (window glass 5 Is broken into an inverted U-shape). Then, as shown in FIG. 11, the clip 40 falls.

In the detection unit 60 of FIG. 3, before the window glass 5 is broken, the output Vs1 of the magnetic sensor 61 shows a value equal to or higher than a predetermined threshold value. The output signal of the sensor 61 does not show a value greater than a predetermined threshold value. Thereby, the fall of the clip 40 is detected.

In this way, if the tempered glass is partially broken, it can be cracked and the strength is remarkably reduced, so that undetected and erroneous detection can be minimized.
Further, as shown in FIG. 2, even when the window glass 5 is not in the fully closed position, since the

core members

62a and 62b having the standing portions 63 are used, the window glass 5 can be opened even when the window glass 5 is opened over a wide range. Breakage of the glass 5 can be detected. That is, in the prior art (Patent Document 1), since the movement of the window glass when the window glass was fully closed was detected, it was not possible to detect the breakage of the window glass when the window glass was not in the fully closed position. In the present embodiment, breakage of the window glass can be detected even when the window glass is opened for ventilation and the window glass is not in the fully closed position.

Specifically, even when the occupant is parked with the window open for ventilation, that is, the window is open to some extent (for example, about 7 cm in consideration of suppressing the temperature rise in the vehicle interior in summer, for example). It is necessary to be able to detect the breakage of the window glass even when the window is opened. If the air has a low magnetic permeability and the window is opened and the magnet 50 is positioned below, the output of the magnetic sensor 61 decreases (see the waveform of Vs2 in FIG. 7). In the present embodiment, the shape of the core material (core) is vertically extended, the lower end thereof is disposed in the vicinity of the magnetic sensor 61, and the

core materials

62a, 62b was placed. Accordingly, the

core member

62a, 62b (standing member 63) absorbs the magnetic force of the magnet 50 even if the vertically extending core member 63 serves as a passage for the magnetic force and the magnet 50 moves slightly up and down. Can be transmitted to the magnetic sensor 61.

5 includes a first member 41 and a second member 42 which are formed by bending and opposing a steel plate for a leaf spring, and includes a first member 41 and a second member 42 on which the window glass 5 is disposed. The first member 41 and the second member 42 are biased toward each other with the first member 41 and the second member 42 in contact with each other at a position shifted in the plane of the window glass 5. As a result, a force is applied to the window glass 5 at different locations on the front surface 5a and the back surface 5b of the window glass 5, so that the window glass 5 is damaged (with a decrease in the strength of the window glass 5). It is possible to reliably detect the breakage of the window glass 5 by reliably crushing the end portion of the glass 5.

Further, the contact portion of the first member 41 of the clip 40 of FIG. 5 with the window glass 5 is separated from the contact portion of the second member 42 with the window glass 5 in the plane of the window glass 5 and the first member. Both contact portions with the window glass 5 in 41 are connected around the contact portion with the window glass 5 in the second member 42. Therefore, as shown in FIG. 9, the window glass 5 is pressed in a state where the window glass 5 is in contact with the first member 41 around the contact portion of the second member 42 with the window glass 5. That is, in the first member 41, the window glass 5 is pressed inside the inner periphery of the through hole 44 in a state where the window glass 5 is supported around the through hole 44. Thereby, as shown in FIG. 10, the edge part of the window glass 5 can be grind | pulverized easily and the clip 40 can be reliably dropped.

In FIG. 3, when the break of the window glass 5 is detected by detecting the fall of the clip 40 (by the output value of the magnetic sensor 61) by the detection unit 60, the determination unit 70 operates the alarm unit 80 to generate an alarm. To emit.

According to the above embodiment, the following advantages can be obtained.
(1) When the window glass is not in the fully closed position because the

core members

62a and 62b made of a magnetic material and magnetically coupled to the magnetic sensor 61 and having at least a part extending in the vertical direction are provided. The magnetic force of the magnet 50 is transmitted to the magnetic sensor 61 through the

core members

62a and 62b, and the magnetic field H1 by the magnet 50 is detected by the magnetic sensor 61. Thereby, breakage of the window glass can be detected even when the window glass is not in the fully closed position.

(2) The magnet 50 is fixed to the clip 40 that sandwiches the window glass at the end portion of the window glass, and the clip 40 is urged toward each other at a position shifted in the plane of the window glass. The first member 41 and the second member 42 are provided. Therefore, the edge part of the window glass 5 can be crushed reliably with the breakage of the window glass 5.
(Second Embodiment)
Next, the second embodiment will be described focusing on the differences from the first embodiment.

Instead of FIG. 4, the present embodiment has the configuration shown in FIG. Instead of the magnetic sensor 61 in FIG. 4, an MR sensor 68 (magnetoresistance element) is used in the present embodiment in FIG. Further, instead of FIG. 6, the present embodiment has the configuration shown in FIG. FIG. 14 shows an electrical configuration of the openable / closable window glass breakage detection device 30 in the present embodiment.

14, the openable / closable window glass breakage detection device 30 includes a magnet 50, a detection unit 60, and a determination unit 70, and the detection unit 60 includes a magnetic switch 90 and a reverse magnetic field generation unit 91.

The magnetic switch 90 includes an MR sensor 68 (magnetoresistive element) and an NPN transistor 92 as a switching element. The reverse magnetic field generator 91 includes a resistor 93, two

coils

94 a and 94 b, and a capacitor 95.

One end of the MR sensor 68 is connected to the determination unit 70, and a voltage (for example, 5 volts) is applied from the determination unit 70 to one end of the MR sensor 68. The other end of the MR sensor 68 is connected to the base of the NPN transistor 92. The collector of the NPN transistor 92 is connected to one end of the MR sensor 68 on the determination unit 70 side. The emitter of the NPN transistor 92 is grounded via a resistor 93 and a series circuit of

coils

94a and 94b. A connection point γ between the resistor 93 and the coil 94 b is grounded via a capacitor 95.

As shown in FIGS. 12 and 13, the coil 94a is wound around a core material (core) 62a. Similarly, the coil 94b is wound around the core material 62b. Other configurations of the

core members

62a and 62b are the same as those in the first embodiment. That is, the

core members

62a and 62b are made of a magnetic material (specifically, permalloy, which is a high permeability material), are magnetically coupled to the MR sensor 68 constituting the magnetic switch 90, and extend vertically. In addition, the reverse magnetic

field generating coils

94a and 94b are wound.

14 is turned on by the magnetic field H1 of the magnet 50. That is, the current flowing through the MR sensor 68 is increased by the magnetic field H1 of the magnet 50, the base current flows through the NPN transistor 92, and the NPN transistor 92 is turned on.

When the magnetic switch 90 (NPN transistor 92) is turned on, a reverse magnetic field H2 that cancels the magnetic field H1 of the magnet 50 is generated in the

coils

94a and 94b. That is, when the NPN transistor 92 is turned on, a constant current is supplied to the

coils

94a and 94b to generate a reverse magnetic field H2. This reverse magnetic field H2 cancels the magnetic field H1 of the magnet 50. That is, when no current is supplied to the

coils

94a and 94b, magnetic force is collected through the

core members

62a and 62b and a magnetic field is applied to the MR sensor 68 with a predetermined magnetic flux density. However, when current is supplied to the

coils

94a and 94b, MR is applied. The magnetic flux density applied to the sensor 68 can be made substantially zero. As a result, since the current flowing through the MR sensor 68 becomes small, the NPN transistor 92 is turned off and the current supply to the

coils

94a and 94b is stopped.

Thereby, the reverse magnetic field H2 generated in the

coils

94a and 94b is also "0". When the reverse magnetic field H2 generated in the

coils

94a and 94b becomes “0”, the magnetic switch 90 (NPN transistor 92) is turned on by the magnetic field H1 of the magnet 50.

This operation is repeated to switch the magnetic switch 90. At this time, a delay circuit is configured by the resistor 93 and the capacitor 95. When the magnetic switch 90 is turned on by the delay circuit (the resistor 93, the capacitor 95), the current flowing through the

coils

94a and 94b is delayed to thereby delay the magnetic switch 90. The switching cycle is increased.

14 includes a control unit 71, a current monitoring unit 72, a memory 74, and a shunt resistor 73. The control unit 71 is connected to the MR sensor 68 of the detection unit 60 via the shunt resistor 73, a voltage is applied from the control unit 71 to the MR sensor 68, and a current is detected by the shunt resistor 73. The current monitoring unit 72 takes in a voltage corresponding to the energization current from the shunt resistor 73 and sends the result to the control unit 71. The control unit 71 is configured using a CPU or a programmable device, obtains an output signal of the current monitoring unit 72, and if the switching period of the magnetic switch 90 is shorter than a predetermined threshold based on the output signal, the window glass is It is determined that the magnet 50 has been dropped. The memory 74 stores data such as threshold values. When the window glass is broken, the control unit 71 causes the alarm unit 80 to issue an alarm.

Next, the relationship between the distance between the magnet 50 and the MR sensor 68 and the switching cycle of the magnetic switch 90 will be described.
FIG. 15A shows a case where the magnet 50 is close to the MR sensor 68, and FIG. 15B shows a case where the magnet 50 is far from the MR sensor 68.

The vertical axis in FIG. 16 indicates the current flowing through the

coils

94a and 94b (current flowing through the γ point in FIG. 14) and the current flowing through the β point in FIG. 14, and the horizontal axis indicates time.
FIG. 16A shows the operation when the magnet positions in FIG. 15A are close. In FIG. 15A, since the position of the magnet 50 is close to the MR sensor 68, the magnetic force of the magnet 50 acts on the MR sensor 68 strongly. Therefore, in order to cancel the magnetic force of the magnet 50, a large amount of current must be supplied to the

coils

94a and 94b. Therefore, the time for turning the magnetic switch 90 from on to off becomes long. On the other hand, FIG.16 (b) has shown the operation | movement when the magnet position of FIG.15 (b) is far. In FIG. 15B, since the position of the magnet 50 is far from the MR sensor 68, the magnetic force of the magnet 50 acts on the MR sensor 68 weakly. Therefore, the current supplied to the

coils

94a and 94b in order to cancel the magnetic force of the magnet 50 may be small. Therefore, the time for turning off the magnetic switch 90 is shortened.

Thus, the switching cycle of the magnetic switch 90 is inversely proportional to the distance between the magnet 50 and the MR sensor 68.
The open / close type window glass breakage detection apparatus of this embodiment operates as follows.

When the magnetic switch 90 is turned on by the magnetic field H1 generated by the magnet 50, the reverse magnetic

field generating coils

94a and 94b connected to the magnetic switch 90 generate a reverse magnetic field H2 that cancels the magnetic field H1 of the magnet 50 when the magnetic switch 90 is turned on. The magnetic switch 90 is turned off. And the determination part 70 detects the fall of the magnet 50 accompanying the breakage | damage of the window glass 5 based on the switching period of the magnetic switch 90. FIG.

Here, with a simple coil, the magnetomotive force is weak and it is difficult to cancel the magnetic force of the ferrite magnet 50. In this embodiment, the

core members

62a and 62b made of a magnetic material that is magnetically coupled to the magnetic switch 90 and wound with the reverse magnetic

field generating coils

94a and 94b extend at least partially in the vertical direction. Even when the glass 5 is not in the fully closed position, the magnetic force of the magnet 50 is transmitted to the magnetic switch 90 through the

core members

62a and 62b. Specifically, as shown in FIG. 17, when the window glass 5 is not in the fully closed position and the window glass is slightly opened for ventilation, the magnet 50 is positioned slightly below. A high signal can be obtained. In addition, a reverse magnetic field can be efficiently applied to the magnetic switch 90. Thereby, breakage of the window glass 5 can be detected.
(Third embodiment)
Next, the third embodiment will be described with a focus on differences from the first embodiment.

As shown in FIGS. 18 and 19, an open / close-type window glass breakage detection device 100 for preventing unauthorized entry is disposed inside the vehicle door 1. The breakage detection device 100 includes a clip 110 and a detection unit 60.

The clip 110 is arranged at the lower end of the window glass 5. The clip 110 includes a plate member 111 and a ring spring 112, and clamps (holds) the lower end portion of the window glass 5 with a predetermined force or more. Specifically, the plate member 111 of the clip 110 is formed of a metal plate, and the plate member 111 includes pressure receiving portions (back plate portions) 111a and 111b that are spaced apart from each other on the back side, and a pressure receiving portion on the front side. And a pressing portion (pressing piece) 111c disposed in the center between 111a and 111b. Between the pressure receiving portions 111a and 111b, a U-shaped recessed portion (recessed portion 111d) is formed on the back side. Further, the pressure receiving portions 111a and 111b and the recessed portion 111d, which are members on the back side, and the pressing portion 111c on the front side are connected by a bottom plate portion 111e. The window glass 5 is disposed between the pressure receiving portions 111a and 111b and the pressing portion 111c in the plate member 111.

One end of the ring spring 112 is located on the back side of the recessed portion 111d of the plate member 111, the other end is located on the front side of the pressing portion 111c of the plate member 111, and is biased so as to narrow both ends. As a result, the pressing portion 111c presses the window glass 5 from the other surface of the window glass 5 at a predetermined pressure or more with the one surface of the window glass 5 in contact with the pressure receiving portions 111a and 111b of the plate member 111. ing.

A magnet (permanent magnet) 115 is disposed on the front side of the pressing portion 111c of the plate member 111 of the clip 110. On the other hand, on the inner panel 3, the detection unit 60 is disposed so as to face the magnet 115, and the output of the detection unit 60 (magnetic sensor 61) corresponds to the distance L to the magnet 115. The detector 60 can detect the displacement of at least a part of the clip 110 due to the breakage of the window glass 5. An alarm device 122 is connected to the detection unit 60 via a controller 121.

As described with reference to FIGS. 4 and 6, in the detection unit 60, the magnetic sensor 61 is magnetically coupled to the core members (62 a and 62 b).
Next, the operation of the open / close-type window glass breakage detection apparatus configured as described above, that is, the operation when the window glass 5 is broken (broken) will be described.

In a normal time, the clip 110 arranged at the end of the window glass 5 sandwiches the end of the window glass 5. Specifically, the plate member 111 of the clip 110 holds the window glass 5 by the ring spring 112. The distance between the detection unit 60 and the magnet 115 is L1.

From this state, if the window glass 5 is broken, its strength decreases. That is, when a part of the window glass 5 made of tempered glass is broken, all the window glass 5 is cracked and the strength is remarkably lowered (the glass strength is lowered when the glass is broken).

As the strength decreases, the clip 110 crushes the end portion (lower end portion) of the window glass 5 by its clamping force. That is, the window glass 5 made of tempered glass is partially and completely pulverized (pulverized) by the urging force of the ring spring 112.

As the window glass 5 is partially crushed by the clip 110, the pressing portion 111c of the plate member 111 of the clip 110 is displaced (the pressing portion 111c that is a part of the clip 110 is displaced) as shown in FIG. Specifically, the pressing portion 111c is displaced until the portion of the window glass 5 that is in contact with the pressing portion 111c is pressed by the pressing portion 111c and comes into contact with the recessed portion 111d. The displacement of the pressing part 111c of the clip 110 is detected by the detecting part 60. That is, with the displacement of the pressing portion 111c of the clip 110, the distance L between the detection unit 60 and the magnet 115 increases to L2, which is larger than L1 in FIG. Therefore, even when the window glass 5 remains without being crushed due to the breakage of the window glass 5, the breakage of the window glass 5 can be reliably detected.

When the breakage of the window glass 5 is detected by the detection unit 60, the controller 121 operates the alarm device 122 to issue an alarm.
When the window glass 5 is broken, even if the clip 110 completely crushes the window glass 5 and the clip 110 falls off, the detection unit 60 detects the breakage of the window glass because there is no magnet 115 in front of the detection unit 60. be able to.

The operation when the core members (62a, 62b) and the magnetic sensor 61 are magnetically coupled is as described in the first embodiment. That is, a magnetic field is detected by the magnet 115 that is provided on the window glass 5 that can open and close the opening of the vehicle and generates a constant magnetic field, and breakage of the window glass 5 is detected based on the magnetic field. At this time, the

core members

62a and 62b made of a magnetic material are magnetically coupled to the magnetic sensor 61 as a magnetic detection unit that detects a magnetic field by the magnet 115, and the

core members

62a and 62b extend in the vertical direction. At least a standing part. Therefore, since at least part of the

core members

62a and 62b extends in the vertical direction, the magnetic force of the magnet 115 is transmitted to the magnetic sensor 61 through the

core members

62a and 62b even when the window glass 5 is not in the fully closed position. The magnetic field by 115 is detected by the magnetic sensor 61, and the breakage of the window glass 5 can be detected.

The configuration of the present embodiment described with reference to FIGS. 18, 19, and 20 may be applied to the second embodiment. In this case, the magnetic switch 90 is turned on by the magnetic field generated by the magnet 115 that is provided on the window glass 5 that can freely open and close the opening of the vehicle and generates a constant magnetic field. When the magnetic switch 90 is turned on, a reverse magnetic field that cancels the magnetic field of the magnet 115 is generated by the reverse magnetic

field generating coils

94a and 94b connected to the magnetic switch 90. Thereby, the breakage of the window glass 5 is detected based on the switching period of the magnetic switch 90 while turning off the magnetic switch 90. At this time, the

core materials

62a and 62b made of a magnetic material are magnetically coupled to the magnetic switch 90 (MR sensor 68), and the reverse magnetic

field generating coils

94a and 94b are wound around the

core materials

62a and 62b. And at least a standing portion extending in the vertical direction. Therefore, since the core members 92a and 92b that are magnetically coupled to the magnetic switch 90 and are wound with the reverse magnetic

field generating coils

94a and 94b have at least a standing portion extending in the vertical direction, the window glass 5 is fully closed. Even when not in the position, the magnetic force of the magnet 115 is transmitted to the magnetic switch 90 through the

core members

62a and 62b, and the reverse magnetic field is efficiently applied to detect the breakage of the window glass 5.

The embodiment is not limited to the above, and may be embodied as follows, for example.
The core material (62a, 62b) may be formed using other materials of permalloy, such as a fine mate or an amorphous laminated core.

A Hall element may be used instead of the magnetic sensor 61.
In FIG. 14, the magnetic sensor 90 and the NPN transistor 92 constitute the magnetic switch 90. Alternatively, a magnetic switch may be constituted by a reed switch. Here, the reed switch is in a state where the reed contact inside the reed switch is not in contact (off) during non-operation, and the reed is magnetized by the magnetic force applied from the outside during operation, and the reed contact comes into contact (on). When the magnetic force is removed, the contact lead contacts are not contacted by elasticity (off).

Instead of FIG. 4, the configuration shown in FIGS. 21A and 21B may be adopted. In FIG. 21A, the

core members

97a and 97b are L-shaped and have standing portions. In FIG. 21 (b), each

core member

98a, 98b is linear, and both the

core members

98a, 98b are V-shaped so as to extend obliquely in the vertical direction. Further, as an alternative to FIG. 12,

coils

94a and 94b are wound around the

core members

97a, 97b, 98a and 98b shown in FIGS. 21 (a) and (b) as shown in FIGS. 22 (a) and 22 (b). May be.

Although the

core materials

62a and 62b are disposed on the left and right sides of the magnetic sensor 61 and the MR sensor 68, the core material may be disposed on only one of the left and right sides.
Although an X arm type window regulator is used as the window regulator, a cable type window regulator may be used.

As a drive part, not only what has a motor but the thing by a passenger | crew's manual may be sufficient.
Although the window glass breakage detection device has been applied to the right front door of a passenger car, it can of course be applied to other side doors. In addition to the side doors, it is provided on the rear doors and roofs. The present invention may be applied to an openable / closable glass roof.

The clip 40 is installed at the lower end of the window glass 5, but is not limited thereto, and may be installed at the lower part of the side surface of the window glass 5, for example. In short, what is necessary is just to install in the inconspicuous place inside the vehicle door 1 among the edge parts of a window glass.

DESCRIPTION OF SYMBOLS 1 ... Vehicle door, 4 ... Opening part, 5 ... Window glass, 30 ... Opening-and-closing type window glass breakage detection apparatus, 40 ... Clip, 50 ... Magnet, 60 ... Detection part, 61 ... Magnetic sensor, 62a, 62b ... Core material, 68 ... MR sensor, 70 ... determination unit, 90 ... magnetic switch, 94a, 94b ... coil, 115 ... magnet.

Claims

A magnet that is provided on a window glass that can freely open and close the opening of the vehicle and generates a certain magnetic field;
A magnetic detection unit for detecting a magnetic field generated by the magnet;
A determination unit for detecting breakage of the window glass based on the magnetic field detected by the magnetic detection unit;
A core material made of a magnetic material, magnetically coupled to the magnetic detection part, and having at least a standing part extending in the vertical direction;
A window glass breakage detection device comprising:
The window glass breakage detection device according to claim 1, wherein the determination unit detects the fall of the magnet accompanying the breakage of the window glass based on the magnetic field detected by the magnetic detection unit.
A magnet that is provided on a window glass that can freely open and close the opening of the vehicle and generates a certain magnetic field;
A magnetic switch that is turned on by a magnetic field generated by the magnet;
A reverse magnetic field generating coil that is connected to the magnetic switch and generates a reverse magnetic field that cancels the magnetic field of the magnet when the magnetic switch is turned on to turn off the magnetic switch;
A determination unit for detecting breakage of the window glass based on a switching period of the magnetic switch;
A core material made of a magnetic material, magnetically coupled to the magnetic switch, and having at least an upright portion around which the reverse magnetic field generating coil is wound and extending in the vertical direction;
A window glass breakage detection device comprising:
4. The window glass breakage detection device according to claim 3, wherein the determination unit detects a fall of the magnet accompanying breakage of the window glass based on a switching period of the magnetic switch.
The window glass breakage detection device according to any one of claims 1 to 4, wherein the core member is made of a high permeability material.
The window glass breakage detection device according to any one of claims 1 to 5, further comprising a clip that sandwiches the window glass at an end of the window glass, and the magnet is fixed to the clip.
The clip includes a first member and a second member, and the first member and the second member are positioned at positions shifted from each other within a plane of the window glass with the window glass disposed therebetween. The window glass breakage detection device according to claim 6, wherein the window glass breakage detection device is urged in a direction in which the glass comes into contact with each other by its own elasticity.