JP2004142528A - Anti-theft device for motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-theft device for a motorcycle capable of detecting acceleration in a horizontal direction even when mounted on either plane of an XY plane, YZ plane or ZX plane of a vehicle body. <P>SOLUTION: The anti-theft device for the motorcycle is composed of a casing having a mounting surface, a substrate 16 housed in the casing in parallel with the mounting surface, and a biaxial acceleration sensor 13 mounted on the substrate 16. One axis of detecting axes of the biaxial acceleration sensor 13 is disposed perpendicular to the substrate 16. Accordingly the casing can be mounted efficiently in terms of use of space in accordance with a part arrangement structure of the vehicle to obtain a simple layout. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a motorcycle anti-theft device.
[0002]
[Prior art]
2. Description of the Related Art As an anti-theft device for an automobile, an acceleration sensor that detects a vibration due to an inclination with respect to the direction of gravity or an impact is used.
[0003]
FIG. 8 is a basic configuration diagram of the acceleration sensor.
[0004]
As shown in (A), a center electrode plate 2 fixed to a beam 1 is sandwiched between two fixed electrode plates 3 to form a capacitor 4. Both ends of the beam 1 and each fixed electrode plate 3 are fixed to a housing (not shown) by an anchor 5.
[0005]
When the beam is moved and the position of the center electrode plate 2 is changed, as shown in (B), when the sensor is tilted and the gravity component changes or an impact is applied, the two plates on both sides of the center electrode plate 2 are fixed. The values of the two capacitors with the pole plate 3 change, and an acceleration signal corresponding to the difference is output.
[0006]
With such a configuration, acceleration in one axial direction (axial direction of the beam 1) is detected. By providing a center electrode plate on another beam or a moving plate orthogonal to the beam 1 and combining the same acceleration sensor, a two-axis orthogonal acceleration sensor is formed.
[0007]
Such a two-axis acceleration sensor is mounted on a board, and the board is mounted in a box-shaped case to form an anti-theft device. One surface of the case serves as a mounting surface, and the substrate is accommodated in the case in a state parallel to the mounting surface.
[0008]
Such an anti-theft device is mounted on a body frame of a motorcycle, for example, as shown in FIG. The anti-theft device mounted on the vehicle body frame determines the theft state from the output of the sensor as X, Y, Z directions as shown in the vehicle width direction (left-right direction), front-rear direction (traveling direction), and vertical direction, respectively. It discriminates and issues an alarm when it detects a stolen state. In this case, the sensor detects the theft state by detecting the vibration of the vehicle body when the main stand 6 is raised and the vehicle body is moved down, and the inclination of the vehicle body when the vehicle body is moved by holding the handle 7. Determine. Therefore, the housing of the anti-theft device must be mounted so that one of the two axes of the acceleration sensor can be detected in the left-right direction (X direction).
[0009]
[Problems to be solved by the invention]
However, motorcycles, in particular, have little room in space, and the mounting position of the sensor is restricted. Therefore, depending on the type of the vehicle, there may be a case where the vehicle cannot be mounted on any of the XY plane (horizontal plane), the YZ plane (vertical plane including the front-rear direction) and the ZX plane (vertical plane including the left-right direction). In such a case, in order to detect the inclination of the vehicle body in the left-right direction, the acceleration sensor must be separately mounted and the wiring must be routed, and the layout may be complicated.
[0010]
The present invention has been made in consideration of the above conventional technology, and provides a motorcycle anti-theft device capable of detecting lateral acceleration even when attached to any of the XY plane, YZ plane and ZX plane of a vehicle body. Aim.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, there is provided a theft of a motorcycle including a housing having a mounting surface, a substrate housed in the housing in parallel with the mounting surface, and a two-axis acceleration sensor mounted on the substrate. An anti-theft device for a motorcycle, wherein one of detection axes of the two-axis acceleration sensor is perpendicular to the substrate.
[0012]
According to this configuration, by mounting the acceleration sensor on the board so that one axis of the two-axis acceleration sensor having two orthogonal detection directions is perpendicular to the board, the XY plane, the YZ plane, and the ZX Regardless of which surface is mounted, acceleration in the X direction (left / right direction) can be detected, and a simple layout can be obtained by efficiently mounting the housing in space according to the component arrangement structure of the vehicle body. be able to.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 3 are explanatory diagrams of an anti-theft device according to a comparative example of the present invention, and FIGS. 4 to 6 are explanatory diagrams of an anti-theft device according to the embodiment of the present invention.
[0014]
The anti-theft device 8 shown in FIGS. 1 to 3 is a device in which a two-axis acceleration sensor 10 is disposed in a housing 9 in parallel with a mounting surface (a lower surface in the drawing) of the housing 9. Actually, the acceleration sensor 10 is mounted on a board (not shown) in parallel with the board surface, and the board is stored in the housing 9 in parallel with the mounting surface. The arrows of the acceleration sensor 10 in the drawing indicate the detection directions of two orthogonal axes. Further, the acceleration sensor 10 is shown in a state of being taken out of the housing.
[0015]
FIG. 1 shows an example in which it is mounted on the XY plane of a vehicle body. In this case, it is possible to detect the inclination in the X direction (left-right direction) regardless of the direction of attachment (A) or (B).
[0016]
FIG. 2 shows an example in which it is mounted on the YZ plane of the vehicle body. In this case, in both (A) and (B), detection in the X direction (left-right direction) cannot be performed.
[0017]
FIG. 3 shows an example in which it is mounted on the ZX plane of the vehicle body. In this case, it is possible to detect the inclination in the X direction (left-right direction) regardless of the direction of attachment (A) or (B).
[0018]
Therefore, in the anti-theft device 8 in which the acceleration sensor 10 is mounted in the housing 9 so that the detection surface including the two detection axes is parallel to the mounting surface, when the anti-theft device 8 is mounted on the YZ plane, the mounting direction may be changed in any manner. , The inclination in the X direction (left and right direction) cannot be detected, so that the sensor cannot be mounted on the YZ plane, which imposes restrictions on the layout.
[0019]
The anti-theft device 11 shown in FIGS. 4 to 6 is a device in which a two-axis acceleration sensor 13 is disposed in a housing 12 so as to be perpendicular to a mounting surface (a lower surface in the drawing) of the housing 12. Actually, the acceleration sensor 13 is mounted on a board (not shown) in parallel with the board surface, and the board is stored in the housing 12 in parallel with the mounting surface. Note that, similarly to the comparative example, the arrows of the acceleration sensor 13 in the drawing indicate the detection directions of two orthogonal axes. Further, the acceleration sensor 13 is shown in a state of being taken out of the housing.
[0020]
FIG. 4 shows an example in which it is attached to the XY plane of the vehicle body. In this case, the inclination in the X direction (left / right direction) cannot be detected in the mounting direction (B), but the inclination in the X direction (left / right direction) can be detected by mounting in the direction (A). .
[0021]
FIG. 5 shows an example in which it is attached to the YZ plane of the vehicle body. In this case, in both (A) and (B), detection in the X direction (left-right direction) is possible.
[0022]
FIG. 6 shows an example in which it is mounted on the ZX plane of the vehicle body. In this case, the inclination in the X direction (left / right direction) cannot be detected in the mounting direction (B), but the inclination in the X direction (left / right direction) can be detected by mounting in the direction (A). .
[0023]
Therefore, in the anti-theft device 11 in which the acceleration sensor 13 is mounted in the housing 12 such that the detection surface including the two detection axes is perpendicular to the mounting surface, the acceleration sensor 13 is mounted on any of the XY surface, the YZ surface, and the ZX surface. Even in this case, the inclination in the X direction (left-right direction) can be detected by changing the mounting direction.
[0024]
FIG. 7 shows an example of mounting the acceleration sensor.
A chip 14 (semiconductor chip or the above-described element in FIG. 8) constituting the two-axis acceleration sensor is mounted on the sensor substrate 15 to constitute the acceleration sensor 13. The sensor board 15 is vertically mounted on the main board 16 by inserting the projections 17 provided on one side of the sensor board 15 into the slits 18 provided on the main board 16. In this state, the pattern 20 on the sensor substrate 15 and the pattern 19 on the main substrate 16 are joined by solder 21. The detection surface of the chip 14 including the two-axis detection direction is perpendicular to the main board 16, one of the two orthogonal axes is perpendicular to the main board 16, and the other axis is parallel to the main board 16. is there. The main board 16 is housed in the housing 12 (FIGS. 4 to 6) in parallel with the mounting surface. Thus, an acceleration sensor having a detection surface perpendicular to the mounting surface of the housing can be formed.
[0025]
【The invention's effect】
As described above, according to the present invention, by mounting the acceleration sensor on the board so that one axis of the two-axis acceleration sensor having two orthogonal detection directions is perpendicular to the board, the XY plane of the vehicle body, Regardless of whether it is mounted on the YZ plane or the ZX plane, acceleration in the X direction (left / right direction) can be detected. Layout can be obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory view of mounting a comparative example on an XY plane.
FIG. 2 is an explanatory view of attachment to a YZ plane of a comparative example.
FIG. 3 is an explanatory view of attachment to a ZX surface of a comparative example.
FIG. 4 is an explanatory view for attaching the embodiment of the present invention to the XY plane.
FIG. 5 is an explanatory view of mounting the embodiment of the present invention on the YZ plane.
FIG. 6 is an explanatory view of mounting the embodiment of the present invention on the ZX plane.
FIG. 7 is an explanatory view of an example of mounting the acceleration sensor of the present invention on a substrate.
FIG. 8 is a diagram illustrating a configuration of an acceleration sensor.
FIG. 9 is an explanatory view of a motorcycle to which the antitheft device is attached.
[Explanation of symbols]
1: beam, 2: center plate, 3: fixed plate, 4: condenser
5: anchor, 6: main stand, 7: handle, 8: anti-theft device,
9: housing, 10: two-axis acceleration sensor, 11: anti-theft device,
12: housing, 13: two-axis acceleration sensor, 14: chip, 15: sensor board,
16: Main board, 17: Projection piece, 18: Slit, 19: Pattern,
20: pattern, 21: solder.

Claims (1)

A housing having a mounting surface;
A substrate housed in the housing in parallel with the mounting surface,
In a motorcycle anti-theft device comprising a two-axis acceleration sensor mounted on the board,
A motorcycle anti-theft device, wherein one axis of the detection axes of the two-axis acceleration sensor is perpendicular to the substrate.

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