JP2011098603A - Device for detecting breakage of open/close type window glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for detecting breakage of an open/close type window glass by which the breakage can be detected by increasing magnetic flux density in a magnetic sensor arranged separately from a magnet disposed in an open/close type window glass. <P>SOLUTION: The magnet is disposed in the window glass which can open/close an opening section of a vehicle, and generates a certain magnetic field. A printed circuit board 82 is arranged separately from the magnet. A hall IC 81 is mounted on the printed circuit board 82, and detects the magnetic field of the magnet. Core materials 83 and 84 composed of a magnetic material are magnetically coupled to the hall IC 81. A through hole 82a is formed at a portion of the printed circuit board 82 which becomes a magnetic path to the hall IC 81 by the core materials 83 and 84. The front end of the core material 84 is disposed within the through hole 82a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a breakage detection device for an openable window glass.

  Patent Document 1 discloses a breakage detection device for an openable / closable window glass. The device uses a clip that sandwiches the window glass to perform pulverization at the edge of the window glass accompanying the breakage of the window glass. The displacement of at least a part of the clip is detected by a magnetic sensor disposed opposite to the magnet provided on the.

JP 2009-83624 A

  When detecting the displacement of at least a part of the clip using a magnetic sensor, if the opening amount of the openable window glass is large, for example, when opening the window for ventilation in hot summer, etc. There is a need to ensure the magnetic strength of a magnetic sensor that can reliably detect breakage of a window glass.

  The present invention has been made under such a background, and an object of the present invention is to detect a magnetic flux by increasing a magnetic flux density in a magnetic sensor arranged away from a magnet provided on an openable window glass. An object of the present invention is to provide a breakage detection device for an openable window glass.

  In the first aspect of the present invention, an opening / closing type that detects a magnetic field generated by a magnet that is provided on a window glass that can open and close an opening of a vehicle and generates a certain magnetic field, and detects breakage of the window glass based on the magnetic field. Window glass breakage detection device, a printed wiring board spaced apart from the magnet, a magnetic sensor mounted on the printed wiring board for detecting a magnetic field by the magnet, and a magnetic material, A core member that is magnetically coupled to the magnetic sensor and transmits the magnetic force of the magnet to the magnetic sensor, and has a through-hole in a portion serving as a magnetic path to the magnetic sensor by the core member in the printed wiring board Alternatively, the gist is that a recess is formed, and the tip of the core material is disposed in the through hole or in the recess.

  According to the first aspect of the present invention, the magnet that generates a constant magnetic field is provided on the window glass that can open and close the opening of the vehicle, and the printed wiring board that is spaced apart from the magnet is provided with the magnet. A magnetic sensor for detecting a magnetic field is mounted, and breakage of the window glass is detected based on the magnetic field detected by the magnetic sensor.

  Here, the magnetic force of the magnet is transmitted to the magnetic sensor through the core made of a magnetic material magnetically coupled to the magnetic sensor, and the magnetic field by the magnet is detected by the magnetic sensor. Therefore, the magnetic flux density can be increased in the magnetic sensor.

  In addition, a through hole or a concave portion is formed in a portion of the printed wiring board that becomes a magnetic path to the magnetic sensor by the core material, and the tip of the core material is disposed inside the through hole or the concave portion. The tip of the material can be arranged closer to the magnetic sensor, and the permeance can be increased. Thereby, the magnetic flux density can be further increased in the magnetic sensor.

According to a second aspect of the present invention, in the breakable window glass breakage detecting device according to the first aspect, at least a part of the core member may extend in the vertical direction.
According to a third aspect of the present invention, in the breakable window glass breakage detecting device according to the first or second aspect, the core material is preferably made of a high magnetic permeability material.

  The open / close-type window glass breakage detecting device according to any one of claims 1 to 3, wherein the magnet is a clip that sandwiches the window glass at an end portion of the window glass. It is good to be fixed to.

  According to a fifth aspect of the present invention, in the breakage detecting device for an openable / closable window glass according to the fourth aspect, the clips are urged in directions approaching each other at positions shifted in the plane of the window glass. Good.

  According to the present invention, the magnetic sensor can be detected by increasing the magnetic flux density in a magnetic sensor disposed away from the magnet provided on the openable window glass.

The disassembled perspective view in the right front door in a passenger car. The schematic front view in the right front door in a passenger car. The longitudinal cross-sectional view in the AA line of FIG. The perspective view of the breakage detection apparatus of an opening-and-closing type window glass. The exploded perspective view of a clip. (A) is a front view of a clip, (b) is a longitudinal sectional view taken along line AA of (a), and (c) is a longitudinal sectional view taken along line BB of (a). (A), (b) is a figure which shows the positional relationship of the magnet 70 and Hall IC81. (A) is a top view in the arrangement position of Hall IC81 in an embodiment, (b) is a sectional view in an AA line of (a). (A) is a top view in the arrangement position of Hall IC81 in a comparative example, (b) is sectional drawing in the AA of (a). (A) is a front view of a clip, (b) is a longitudinal sectional view taken along line AA of (a), and (c) is a longitudinal sectional view taken along line BB of (a). (A) is a front view of a clip, (b) is a longitudinal sectional view taken along line AA of (a), and (c) is a longitudinal sectional view taken along line BB of (a). (A) is a front view of a clip, (b) is a longitudinal sectional view taken along line AA of (a), and (c) is a longitudinal sectional view taken along line BB of (a). The figure for demonstrating the characteristic about window opening amount and magnetic force. (A) is a top view in the arrangement position of Hall IC81 in another example, (b) is a sectional view in an AA line of (a). The longitudinal cross-sectional view of the breakage detection apparatus of the opening-and-closing type window glass in 2nd Embodiment. The perspective view of the breakage detection apparatus of an opening-and-closing type window glass. The longitudinal cross-sectional view of the breakage detection apparatus of the opening-and-closing type window glass in 2nd Embodiment.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described.
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 is attached to the inner side of the inner panel 3 of the vehicle door 1.

  A window regulator 10 that moves up and down the window glass 5 is housed inside the vehicle door 1. 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 type 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 at the front and rear thereof. 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. A window glass 5 of the vehicle 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.

  A longitudinal section taken along line AA in FIG. 2 is shown in FIG. In FIG. 3, a breakage detection device 30 for an openable window glass for preventing unauthorized entry is disposed inside the vehicle door 1. The breakage detection device 30 includes a clip 40 and a sensor module 80 as a window glass breakage detection tool.

  FIG. 4 is a perspective view of the breakage detection device 30 for the openable window glass. FIG. 5 shows an exploded perspective view of the clip 40, FIGS. 6 (a), (b), and (c) show the clip 40, (a) is a front view, and (b) is an AA view of (a). The longitudinal cross-sectional view in a line, (c) is the longitudinal cross-sectional view in the BB line of (a).

  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 portion of the window glass 5 and sandwiches the window glass 5 (attached to the window glass 5).

  As shown in FIG. 5, the clip 40 includes a clip body 50 as a metal fitting that imparts a clamping force to the window glass 5, a resin molded product 60, and a magnet 70. The resin molded product 60 is interposed between the window glass 5 and the clip main body 50 and seals and holds the permanent magnet 70 (the magnet 70 is molded with resin). As shown in FIGS. 4 and 6, a permanent magnet 70 is disposed on the front side of the clip body 50.

  As shown in FIG. 5, the clip body 50 is configured by bending a single plate spring steel plate. The clip body 50 includes first and second members 51 and 52 and a bent portion (connecting portion) 53 that sandwich the window glass. The first member 51 on the back side has a square shape, and the second member 52 on the front side has left and right standing portions 52a and 52b. The window glass 5 is disposed between the first member 51 on the back side and the second member 52 on the front side (see FIG. 6), and the first member 51 and the second member 52 are in a direction approaching each other with respect to the window glass 5. It is energized.

  The bent portion 53 connects the first member 51 and the second member 52. The bent portion 53 is bent in two steps, the width of the second-stage bent portion 53b is narrower than the thickness of the window glass 5, and the end surface of the window glass 5 is positioned in the first-stage bent portion 53a (see FIG. 6). That is, a stepped portion is formed in the bent portion 53 of the clip main body 50, and the end surface of the window glass 5 is positioned at the stepped portion as shown in FIG. (The window glass 5 is not sandwiched near the lower side).

  In FIG. 5, the arm portions 52 c and 52 d extend from the upper ends of the left and right standing portions 52 a and 52 b in the second member 52 in a direction in which they approach each other. The first member 51 is located at a location corresponding to the region surrounded by the standing portions 52a and 52b and the arm portions 52c and 52d in the second member 52.

  The resin molded product 60 includes a front plate portion 61, a lower surface pedestal portion 62, a magnet sealing portion 63, and a rear side holding portion 64, which are integrally formed. As shown in FIGS. 5 and 6C, the lower surface pedestal portion 62 has a flat upper surface, and the window glass 5 is placed on the flat portion. And as shown in FIG.6 (c), the lower surface base part 62 is located between the bending part 53 of the clip main body 50, and the window glass 5. As shown in FIG. A plate-like front plate portion 61 is erected from the front end of the lower surface pedestal portion 62. The front plate portion 61 has a rectangular shape, and a rectangular through hole 61a is formed in the central portion. Then, as shown in FIG. 6C, the front plate portion 61 is located between the second member 52 of the clip body 50 and the window glass 5.

  Further, in the resin molded product 60, a magnet sealing portion 63 is erected at the center portion at the front end of the lower surface pedestal portion 62 extending in the left-right direction. The magnet sealing portion 63 seals a square plate-like magnet (ferrite magnet) 70 therein, and the magnet sealing portion 63 also has a square plate shape. The magnet sealing part 63 is arrange | positioned so that it may extend up and down in the center part in the through-hole 61a extended in right and left, as shown to Fig.6 (a). In FIG. 6A, the upper part of the magnet sealing part 63 is located inside the through hole 61a, and the lower part is located below the through hole 61a. A back side holding portion 64 extends from the lower end of the magnet sealing portion 63. As shown in FIG. 6B, the back side holding portion 64 is located between the first member 51 of the clip body 50 and the window glass 5. Here, a through hole 51a (see FIGS. 5 and 6B) is formed in the first member 51 of the clip body 50, and a protrusion formed in the back side holding portion 64 of the resin molded product 60 in the through hole 51a. 64a is fitted.

  As shown in FIG. 6 (c), the clip body 50 has the second member 52 positioned on the indoor side surface (back surface 5 b) side of the window glass 5, and the first member 51 is the outdoor surface of the window glass 5. It is located on the (surface 5a) side. And the 1st member 51 of the clip main body 50 is a place corresponding to the area | region enclosed by the standing parts 52a and 52b and the arm parts 52c and 52d in the 2nd member 52, as shown to Fig.6 (a), As shown in FIG. 6B, the window glass 5 is biased from the surface 5a. Therefore, the urging part to the window glass 5 in the second member 52 is provided so as to be spaced apart at two locations in the plane of the window glass 5 and sandwich the urging part to the window glass 5 in the first member 51. .

  As shown in FIGS. 5 and 6B, the magnet sealing portion 63 and the back side holding portion 64 of the resin molded product 60 are opposed to each other. The front side of the back side holding portion 64 of the resin molded product 60 and the window glass 5 are bonded and fixed by a double-sided tape 65 (see FIG. 12B). Further, the back side of the magnet sealing portion 63 of the resin molded product 60 and the window glass 5 are bonded and fixed by a double-sided tape 66 (see FIG. 12B).

  As an assembly order, as shown in FIG. 5, the magnet sealing portion 63 of the resin molded product 60 is bonded and fixed to the back surface 5 b of the window glass 5 with a double-sided tape 66. Further, the back side holding portion 64 of the resin molded product 60 is bonded and fixed to the surface 5 a of the window glass 5 with a double-sided tape 65. Thereby, the resin molded product 60 is fixed to the window glass 5. Thereafter, the clip body 50 is attached to the window glass 5 from outside the resin molded product 60 so as to sandwich the window glass 5. At this time, the protrusion 64a of the back side holding portion 64 of the resin molded product 60 is fitted into the through hole 51a of the first member 51 of the clip main body 50, and the clip main body 50 is fixed to the resin molded product 60 by fitting. .

  In this way, the clip main body 50 as a metal fitting is displaced between the first member 51 and the second member 52 in which the window glass 5 is disposed, in the plane of the window glass 5. It is urged in the direction approaching each other at a different position. 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 main body 50 clamps (holds) the lower end portion of the window glass 5 with a predetermined force or more.

  As shown in FIGS. 4 and 6, a magnet (permanent magnet) 70 is fixed to the front side of the clip 40. In this embodiment, a ferrite magnet is used as the magnet 70. As shown in FIG. 4, the magnet 70 is magnetized with the left half being an N pole and the right half being an S pole. A magnet 70 as a magnetic field generating unit generates a constant magnetic field H1 as shown in FIG.

  The sensor module 80 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. As shown in FIG. 4, the sensor module 80 is configured by housing a Hall IC 81, a printed wiring board 82, and the like in a case. The Hall IC is a peripheral circuit (drive circuit, Hall element) in a chip on which the Hall element is formed. And the like are integrated. In this embodiment, the Hall IC 81 constitutes a magnetic sensor.

FIG. 7 is a diagram showing the positional relationship between the magnet 70 and the Hall IC (magnetic sensor) 81 of the sensor module 80.
As shown in FIGS. 4 and 7, the sensor module 80 includes a Hall IC 81 as a magnetic sensor for detecting the magnetic field H <b> 1 by the magnet 70, a printed wiring board 82, and core members 83 disposed on the left and right of the Hall IC 81. 84. The core members 83 and 84 are made of a magnetic material. Specifically, the core members 83 and 84 are made of permalloy, which is a high permeability material. Each of the core members 83 and 84 is made of a single bar and extends in the horizontal direction from the tip of the first horizontal portions 83a and 84a extending in the direction of contact with and away from the Hall IC 81 in the horizontal direction. 70, second horizontal portions 83b and 84b extending in a direction approaching 70, and standing portions 83c and 84c extending downward from the tips of the second horizontal portions 83b and 84b. The first horizontal portions 83a and 84a and the second horizontal portions 83b and 84b extend in an L shape in the horizontal direction. The upper ends of the standing portions 84c and 84c of the core members 83 and 84 are disposed at substantially the same height as the magnet 70 when the window glass 5 is fully closed (separated from the magnet 70 by a predetermined distance in the Y direction). ) Further, the Hall IC 81 is disposed close to the front end surfaces of the first horizontal portions 83a and 84a of the core members 83 and 84. As a result, the Hall IC 81 is magnetically coupled to the core members 83 and 84, and part of the core members 83 and 84 extends in the vertical direction. The magnetic material (magnetic force) of the magnet 70 is collected by the core members 83 and 84 and can be transmitted to the Hall IC 81 to increase the magnetic flux density in the Hall IC 81.

The mounting structure of the Hall IC (magnetic sensor) 81 and the arrangement structure of the core members 83 and 84 on the printed wiring board 82 will be described with reference to FIG.
The Hall IC (package) 81 has a main body part 81a incorporating a chip and three terminals 81b extending from the main body part 81a. The three terminals 81b are a ground terminal, a power supply terminal, and an output terminal. Three terminals 81b of the Hall IC 81 are passed through the through holes of the printed wiring board 82, and each terminal 81b is soldered to the printed wiring board 82, so that the Hall IC 81 is mounted on the printed wiring board 82. When the Hall IC 81 receives a magnetic force from a direction orthogonal to the printed wiring board 82, a signal corresponding to the magnetic force is output.

  A through hole 82 a is formed in the area where the Hall IC 81 is arranged on the printed wiring board 82. The through hole 82a is formed slightly larger than the core member 84, and the core member 84 can be inserted into the through hole 82a. The tip of the first horizontal portion 84a of the core member 84 is inserted into the through hole 82a of the printed wiring board 82, and the tip of the first horizontal portion 84a of the core member 84 and the Hall IC 81 are separated by a predetermined distance L11. Yes. Further, the tip of the first horizontal portion 83a of the core member 83 and the Hall IC 81 are separated by a predetermined distance L10.

  In this manner, the Hall IC 81 is mounted on the printed wiring board 82 that is disposed away from the magnet 70, and the magnetic field is detected by the Hall IC (magnetic sensor) 81.

  As shown in FIG. 3, the sensor module 80 (Hall IC 81) is connected to a controller 90 as determination means. The controller 90 includes an A / D converter and a microcomputer, and the microcomputer can take in signals obtained by A / D conversion of signals from the Hall IC (magnetic sensor) 81. Then, the controller 90 in FIG. 3 detects the fall of the magnet 70 accompanying the breakage of the window glass based on the magnetic field detected by the Hall IC (magnetic sensor) 81, that is, the sensor output. In FIG. 3, an alarm unit 91 is connected to the controller 90.

Next, the operation of the breakage detecting device for the open / close type window glass configured as described above, that is, the operation when the window glass 5 is broken (broken) will be described.
In the normal state, as shown in FIG. 6, when the occupant leaves the vehicle, the window glass 5 is fully closed or slightly opened by a few centimeters. The controller 90 detects the position of the window glass 5 from the output level of the sensor module 80, and sets the glass breakage detection mode when the window glass 5 is fully closed or opened several cm when the parking brake is operated. . On the other hand, the clip 40 arranged 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 51 and the second member 52 by the elastic force of the clip body 50 of the clip 40 itself. Further, the magnet 70 is located in front of the sensor module 80.

  If the window glass 5 is broken from this state, the strength thereof is lowered. That is, when a part of the window glass 5 made of tempered glass is broken, as shown in FIG. 10, the window glass 5 is cracked and the strength is significantly reduced (the glass strength is reduced when the glass is broken).

  As the strength decreases, the clip 40 crushes the end portion (lower end portion) which is a partial region of the window glass 5 by the 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. 12, the clip 40 falls. Specifically, as shown in FIGS. 10 and 11, the window glass 5 is pressed by the first member 51, the window glass 5 is shattered, and the clip 40 falls.

  In the Hall IC 81 of the sensor module 80, before the window glass 5 is broken, the output value of the Hall IC 81 shows a value equal to or greater than a predetermined threshold value. Output value does not show a value equal to or greater than a predetermined threshold. Thereby, the fall of the clip 40, that is, the breakage of the window glass 5 is detected. 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.

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, the clip 40 is dropped when the window glass 5 is broken, so that the breakage of the window glass 5 can be detected.

  6 has a first member 51 and a second member 52 that are formed by bending and opposing a steel plate for a leaf spring, and is between the first member 51 and the second member 52 on which the window glass 5 is disposed. In FIG. 1, the first member 51 and the second member 52 are displaced in the plane of the window glass 5 by their own elasticity in directions opposite to each other (approaching to each other) with respect to the glass surface (the front surface 5a and the rear surface 5b). Direction). 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 is accompanied by breakage of the window glass 5 (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 window 5.

  In FIG. 3, when the breakage of the window glass 5 is detected by detecting the fall of the clip 40 based on the output value of the Hall IC 81, the controller 90 operates the alarm unit 91 to issue an alarm.

  As shown in FIG. 8, when the through hole 82a is formed in the printed wiring board 82 and the tip of the core member 84 is arranged, and as shown in FIG. 9, the through hole 82a is not formed in the printed wiring board 82. The case where the core member 84 is arranged will be compared.

  As shown in FIG. 8, by forming the through hole 82 a in the printed wiring board 82, the Hall IC 81 can be disposed close to the core material 83 and the core material 84. In FIG. 9, the minimum clearance (distance L12) between the core member 84 and the printed wiring board 82 is, for example, 0.6 mm, and the clearance (distance L13) between the core member 83 and the Hall IC 81 is required. A minimum, for example 0.6 mm, is required. In FIG. 8, the minimum clearance (distance L10) between the core member 83 and the Hall IC 81 is required, for example, 0.6 mm, and the minimum clearance (distance L11) between the core member 84 and the Hall IC 81 is required. For example, 0.6 mm is required.

  Thus, in the case of FIG. 9, if the clearance (distance L12) is 0.6 mm and the thickness t of the printed wiring board 82 is 1.6 mm, the distance between the core member 84 and the Hall IC 81 needs to be 2.2 mm. On the other hand, in the case of FIG. 8, the core material 84 can be made closer to the Hall IC 81 by 1.6 mm, which is the thickness of the printed wiring board 82, by drilling. That is, in FIG. 8, the distance L11 between the core member 84 and the Hall IC 81 may be 0.6 mm.

  In FIG. 9A, the core members 83 and 84 are not symmetrically arranged with respect to the Hall IC 81 in the arrangement direction (Z direction) of the core members 83 and 84 with respect to the Hall IC 81 in the horizontal direction. On the other hand, in FIG. 8A, the core members 83 and 84 are arranged symmetrically with respect to the Hall IC 81 in the arrangement direction (Z direction) of the core members 83 and 84 with respect to the Hall IC 81 in the horizontal direction. Thereby, the balance in the arrangement direction (Z direction) of the core members 83 and 84 is improved, and the symmetry of the magnetic characteristics is good. Thereby, the relative position between the magnet 70 and the Hall IC 81 is resistant to rattling in the Z direction, and the detection area can be expanded.

Since it was confirmed by simulation that the amount of window opening can be increased using FIG.
In FIG. 13, the horizontal axis represents the window opening amount, and the vertical axis represents the magnetic force. The characteristic line of the present embodiment in FIG. 8 (when the printed wiring board has a through hole) and the characteristic line of the comparative example in FIG. 9 (when the printed wiring board has no through hole) are compared. In FIG. 13, the threshold value of the magnetic force that can operate normally is 6 mT.

  From FIG. 13, it can be seen that by forming the through hole 82 a in the printed wiring board 82, the window opening amount can be increased by about 10 mm. For example, when the window opening amount is 25 mm, the threshold value is 6 mT or less in the comparative example (FIG. 9) and cannot be detected, but in this embodiment (FIG. 8), the threshold value is 6 mT or more and can be detected.

  The expansion of the window opening amount will be described in more detail. Increasing the sensitivity of the magnetic sensor to increase the amount of opening of the window capable of detecting glass breakage will increase costs and increase the size of the magnet. In this embodiment, by forming the through hole 82a in the printed wiring board 82, the distance between the tip of the core member 84 that induces the magnetic flux and the Hall IC 81 is substantially reduced without increasing the cost and increasing the size of the magnet. Sensitivity can be increased. Thus, improvement in sensitivity can contribute to an increase in the amount of window opening.

  Even when the occupant is parked with the window open for ventilation, that is, even when the window is open to some extent (for example, when the window is opened to suppress the temperature rise in the passenger compartment in summer), the window glass is broken. Need to be detected. If the air has a low magnetic permeability and the window is opened and the magnet 70 is positioned below, the output of the Hall IC 81 is lowered. In the present embodiment, the core members (cores) 83 and 84 that play a role of a passage in the magnetic force are used, and the end portions thereof are arranged in the vicinity of the Hall IC 81. Thereby, even when the window is opened to perform ventilation when the summer is hot, it is possible to ensure the magnetic strength of the magnetic sensor that can reliably detect the breakage of the window glass.

  Further, since the core members 83 and 84 are provided with standing portions 83c and 84c extending in the vertical direction, even if the magnet 70 moves up and down somewhat, the magnetic force of the magnet 70 is increased by the standing portions 83c of the core members 83 and 84. , 84 c can be absorbed and transmitted to the Hall IC (magnetic sensor) 81.

As described above, according to the present embodiment, the following effects can be obtained.
(1) Since the core members 83 and 84 made of a magnetic material are magnetically coupled to the Hall IC 81 as a magnetic sensor, the magnetic force of the magnet 70 is applied to the Hall IC 81 through the core members 83 and 84 magnetically coupled to the Hall IC 81. The magnetic field generated by the magnet 70 is detected by the Hall IC 81. Therefore, the magnetic flux density in the Hall IC 81 can be increased as compared with the case of propagating through space. In addition, since the through hole 82a is formed in a portion that becomes a magnetic path to the Hall IC 81 by the core materials 83 and 84 in the printed wiring board 82, and the tip of the core material 84 is disposed inside the through hole 82a, the core material 84 The tip can be arranged closer to the Hall IC 81, and permeance can be increased. As a result, the magnetic flux density in the Hall IC 81 can be further increased. As a result, the magnetic flux density can be increased and detected in the Hall IC 81 that is spaced from the magnet 70 provided on the openable window glass 5.

  (2) Since at least a part of the core members 83 and 84 extends in the vertical direction, the magnetic force of the magnet 70 is applied to the Hall IC 81 through the core members 83 and 84 even if the magnet 70 (window glass 5) moves slightly up and down. The magnetic field generated by the magnet 70 is detected by the Hall IC 81. Thereby, breakage of the window glass 5 can be detected.

(3) Since the core members 83 and 84 are made of a high permeability material, it is better.
(4) Since the magnet 70 is fixed to the clip 40 that sandwiches the window glass 5 at the end portion of the window glass 5, the window glass 5 is crushed along with the breakage of the window glass 5, and the window glass 5 is damaged. It can be detected.

  (5) Since the clips 40 are biased toward each other at positions shifted in the plane of the window glass 5, the window glass 5 is reliably crushed along with the breakage of the window glass 5. Damage can be easily detected.

The present embodiment is not limited to the above, and may be embodied as follows, for example.
In FIG. 8, the through-hole 82a is formed in the part which becomes the magnetic path to the Hall IC 81 by the core members 83 and 84 in the printed wiring board 82, and the tip of the core member 84 is arranged inside the through-hole 82a. Instead, as shown in FIG. 14, a concave portion 82b is formed in a portion of the printed wiring board 82 that becomes a magnetic path to the Hall IC 81 by the core materials 83 and 84, and the tip of the core material 84 is disposed inside the concave portion 82b. Also good.
(Second Embodiment)
Next, the second embodiment will be described focusing on the differences from the first embodiment.

  As shown in FIGS. 15 and 16, an opening / closing type window glass breakage detection device 100 for preventing unauthorized intrusion is disposed inside the vehicle door 1. The breakage detection device 100 has a clip 110 and a sensor module 80.

  The clip 110 is disposed 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. It has the press part (press piece) 111c arrange | positioned in the center between 111a and 111b. Between the pressure receiving portions 111a and 111b, a U-shaped recessed portion (recessed portion 11d) 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 that both ends are narrowed. As a result, the pressing portion 111 c is pressed from the other surface of the window glass 5 with a predetermined pressure or more with the one surface of the window glass 5 in contact with the pressure receiving portions 111 a and 111 b of the plate member 111.

  A magnet (permanent magnet) 115 is disposed on the front side of the pressing portion 111 c of the plate member 111 of the clip 110. On the other hand, the sensor module 80 is disposed on the inner panel 3 so as to face the magnet 115, and the output of the sensor module 80 (Hall IC 81) corresponds to the distance L to the magnet 115. The sensor module 80 constitutes detection means for detecting the displacement of at least a part of the clip 110 due to breakage of the window glass 5. An alarm device 122 is connected to the sensor module 80 via a controller 121.

  As described with reference to FIGS. 7 and 8, in the sensor module 80, the Hall IC (81) is mounted on the printed wiring board (82) and the hole is formed by the core members (83, 84) as in the first embodiment. It is magnetically coupled to the IC (81). In addition, a through hole (82a) is formed in a portion of the printed wiring board that becomes a magnetic path to the Hall IC by the core material, and the tip of the core material is disposed inside the through hole (82a). Alternatively, the concave portion (82b) is formed in a portion that becomes a magnetic path to the Hall IC by the core material in the printed wiring board shown in FIG. 14, and the tip of the core material is arranged inside the concave portion (82b).

Next, the operation of the breakage detecting device for the open / close type window glass configured as described above, that is, the operation when the window glass 5 is broken (broken) will be described.
In a normal state, the clip 110 disposed 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 sensor module 80 and the magnet 115 is L1.

  If the window glass 5 is broken from this state, the strength thereof is lowered. 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 portion 111c of the clip 110 is detected by the sensor module 80. That is, with the displacement of the pressing portion 111c of the clip 110, the distance L between the sensor module 80 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 sensor module 80, 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 pulverizes the window glass 5 and the clip 110 falls off, the sensor module 80 detects breakage of the window glass because there is no magnet 115 in front of the sensor module 80. be able to.

  Regarding the operational effect of being magnetically coupled to the Hall IC (81) by the core material (83, 84) and the operational effect of providing the through hole 82a or the recess 82b in the printed wiring board, the first embodiment This is as described in the form.

The embodiment is not limited to the above, and may be embodied as follows, for example.
The core material (83, 84) may be other material of permalloy, for example, a fine mate or an amorphous laminated core.

As a magnetic sensor, a Hall element may be used instead of the Hall IC 81. Alternatively, a magnetoresistive element may be used as the magnetic sensor.
Although the X-arm type window regulator is used as the window regulator, a cable-type window regulator may be used.

The driving means is not limited to the one having a motor, but may be manually operated by a passenger.
・ The window glass breakage detection device was applied to the right front door of a passenger car, but it can of course be applied to other side doors. You may apply to the provided opening-and-closing type glass roof.

  -Although clip 40,110 was installed in the lower end part of the window glass 5 in 1st, 2nd embodiment, you may install in the lower part in the side surface of the window glass 5, for example, without restricting to this.

-With respect to the core members 83 and 84, the standing portions 83c and 84c may not be provided.
-The core material 83 may be omitted and only the core material 84 may be sufficient.

  DESCRIPTION OF SYMBOLS 5 ... Window glass, 40 ... Clip, 70 ... Magnet, 81 ... Hall IC, 82 ... Printed wiring board, 82a ... Through-hole, 82b ... Recessed part, 83 ... Core material, 84 ... Core material, 90 ... Controller, 115 ... Magnet 121. Controller.

Claims (5)

An opening / closing type window glass breakage detecting device for detecting a breakage of the window glass based on a magnetic field generated by a magnet that is provided on a window glass that can open and close a vehicle opening and that generates a constant magnetic field. ,
A printed wiring board disposed away from the magnet;
A magnetic sensor mounted on the printed wiring board for detecting a magnetic field by the magnet;
A core material made of a magnetic material, magnetically coupled to the magnetic sensor, and transmitting the magnetic force of the magnet to the magnetic sensor;
With
In the printed wiring board, a through hole or a concave portion is formed in a portion that becomes a magnetic path to the magnetic sensor by the core material, and a tip of the core material is disposed in the through hole or in the concave portion. Opening and closing type window glass breakage detection device.   The breakage detecting device for an openable window glass according to claim 1, wherein at least a part of the core member extends in the vertical direction.   3. The opening / closing type window glass breakage detecting device according to claim 1, wherein the core member is made of a high permeability material.   The breakage detecting device for an openable / closable window glass according to any one of claims 1 to 3, wherein the magnet is fixed to a clip that sandwiches the window glass at an end portion of the window glass.   The breakage detection device for an openable / closable window glass according to claim 4, wherein the clips are urged in a direction approaching each other at positions shifted in a plane of the window glass.

Images