JPS5850260A - Anti-theft apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anti-theft device in which an optical fiber is incorporated into a flexible strip, and a breakage of the flexible strip is detected photoelectrically to activate an alarm.

2. Description of the Related Art Conventionally, antitheft devices for vehicles, particularly motorcycles, are of the wire lock type using a flexible strip, such as a wire. This is done by wrapping a lock wire around a strong structure such as a utility pole and the wheels, and locking the vehicle by fitting locks attached to both bases of the lock wire, and then firmly connecting the vehicle to the structure. It was meant to be stopped.

However, in recent years, with the development of cutting tools such as wire cutters, wires can be easily cut and theft incidents tend to occur frequently. Therefore, an anti-theft device is used in which an electric wire is embedded in the wire and energized, and when the wire is cut, it is electrically detected and an alarm is activated.

However, in the above-mentioned electric device, it is possible to deactivate the alarm by separately forming a current detour instead of the current-carrying line in the wire, and therefore, after such measures are taken, Cases of theft by cutting wires are becoming more prominent.

The present invention has been made in view of the above-mentioned points, and consists of incorporating an optical fiber into a flexible body, allowing light to pass through the optical fiber during use, and cutting the flexible body to block the light. The present invention provides an anti-theft device that photoelectrically detects the cutting of the flexible strip and activates an alarm when the flexible strip is cut.

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

1 to 4 show an embodiment of the present invention, in which connecting plugs 5.5' are fitted and fixed to both ends 1a and lb of a flexible strip 10, and each of these plugs 5.5' is fitted and fixed. 5' so that it can be fitted into a socket 21° 21' of the main body 20 (FIG. 5). An optical fiber (2) is arranged at the axis of the flexible strip 1, and the area around the optical fiber 20 (not shown) is coated with a synthetic resin such as vinyl. A flexible member such as a plurality of wires 3 is tightly wound spirally along the longitudinal direction around the outer periphery of the coating. It was cut out on the 4th day of the month.

The plug 5 has a substantially cylindrical shape, and has a circumferential direction K on the outer periphery.
118 is formed with a 7 flange 5a and an annular groove 5b, and an O-ring 7 for waterproofing and dustproofing is fitted into the annular groove 5b. Furthermore, a locking notch 5C and a key groove 5d extending in the axial direction from the open end 5f toward the center are formed on the outer circumference of the plug 5. Open end 5 of plug 5
The tip 3m of the wire 3 is fitted inside e, and the tip 3m of the wire 3! and plug 5 are firmly identified by caulking. This plug 5 is made of hard metal. The support 8 has a substantially cylindrical shape, and the tip 21 of the optical fiber 2 is fitted into the opening 48b on the negative side, and a photoelectric element such as a light emitting diode 9 is fitted into the opening 48b on the other side. ing. The light emitting portion 9t of the light emitting diode 90 and the end surface 2a/ of the optical fiber 2 are arranged to face each other at a predetermined interval and to be aligned. This support body 8 aligns and fixes the end face 2a/ of the optical fiber 2 and the light emitting portion 9a of the light emitting element 9.

A connector 10 is fitted into the open end 5f of the plug 5, and connection terminals 9b and 9c of the light emitting diode 9 are connected to the connection terminals 10a and 10c. A space inside the plug 5 is filled with a filling member 11 made of synthetic resin or the like, and the support 8° connector 10 is firmly fixed at a predetermined position within the plug.

The plug 5' is formed in the same manner as the plug 5, and the end 3b of the wire 3 is fitted into the - side opening end 5e' and is firmly fixed by caulking.
A connector 10' is fitted to f'. Support 8'
A light receiving element 15 is fitted into the open end 8a on one side and the end 2b of the optical fiber 2, and the light receiving element 15 is fitted into the opening I21isb/ on the other side, and the light receiving surface 15M of the light receiving element 15 and the end face 2b of the optical fiber 2 are fitted. and are arranged opposite to each other at a predetermined interval. The connection terminals 15b and 15C of the light receiving element 15 are respectively connected to the connection terminals 10m' and 10c of the connector 10'. Of course, the support 8' and the connector 10' are firmly fixed in the plug by the filling member 11.

The housing 2 (l) of the main body 20 (FIG. 5) includes sockets 21 and 21' into which plugs 5.
Lock body 25.' and socket) 21.21' are locked or unlocked. Power case 30. Electric circuit 33 and alarm 3
4th class is provided. The socket 21 has a substantially cylindrical shape and has a size that allows it to be inserted in sliding contact with the plug 5 or its seventh rank portion 5a, and has a connector at the bottom end that engages with the connector 10 of the plug 5. 22 is a protruding strip 2I that engages with the keyway 5d of the plug 5 at a predetermined position on the wall 21m.
C is provided. There is a hole 21b in the wall 21m of the socket 21 at a position corresponding to the notch 5C of the plug 5 (FIG. 6).
A locking pin 2 is provided in this hole 21b.
3 are placed in sliding contact and can be moved in and out. One end 23a of this pin 23 faces into the socket 21, and the other end 23a faces into the socket 21.
A spring 26 is interposed between 3b and the side wall of the main body, and an operator 25b of the lock body 25 is fitted into a hole 23c located approximately in the center.

In a normal state, the pin 23 is pressed leftward by the pressing force of the spring 26 as shown in FIG. 6, and the tip 231 protrudes into the socket 21. When the key 27 is inserted into the lock body 25 and rotated counterclockwise to the off position (FIG. 4) against the spring 26, the tip 23J1 of the pin 23 is recessed into the hole 21b of the socket 21.

The socket 21' is formed similarly to the socket 21, and a connector 22' that engages with the connector 10' of the plug 5' is attached to the bottom end, and a hole in the wall (not shown) is provided with a locking hole. A pin 23' is fitted therein. This pin 2
3' is interlocked with the pin 23, and can be moved together with the operation of the key 27.

The power supply case 30 is removably attached to the main body 20, and can house a power supply 31) for a battery or the like. A locking mechanism 24 (FIG. 5) is provided between the power supply case 30 and the socket 21' to lock the power supply case 30 to the main body 20 in cooperation with the plug 5'. In the illustrated state in which the plug 5'Y is not inserted, the lock is released and the power supply case 30 can be freely removed from the main body 20, and in the state in which the plug 5'Y is inserted, the outer periphery of the plug 5' (not shown) The power source 300 is fitted into a notch (not shown) by pressing a locking pin, and is locked to the main body 20 so that it cannot be removed.

The electric circuit 33 (Fig. 7) includes a transmitting circuit 33m and a receiving circuit 3.
3b, disconnection detection circuit 33c, and drive circuit 3.3dll, the transmission circuit 33m is, for example, a pulse output circuit and outputs a pulse signal P1 of a predetermined period.
Pfi transmits the corresponding optical signal into the optical fiber 2? S
be done. The light receiving cable 15 converts the optical signal V into electric millimeter (mM) corresponding to the optical signal V, and outputs an electric pulse signal PbY corresponding to the optical pulse signal Ph input from the original fiber 2. The receiving circuit receives the signal Pb from the light receiving element 15 and outputs a corresponding pulse signal Pc. The disconnection detection circuit 33c detects the mimv of the optical 7-aipa 2 from the pulse signal P-cho PC&C output from the transmitter circuit 33a and the receiver 1-circuit 33b.
If the conditions are satisfied, it is determined to be normal, and if not, it is determined to be abnormal, and an abnormal signal Pd is output when the condition is abnormal. Further, this disconnection detection circuit 33c determines the connection state LM between the plug 5°5' and the connectors 10.10' and 22.22' of the socket 21.21' of the main body 20, and when the connection is established, that is, the plug When the plugs 5 and 5' are installed in the sockets 21 and 21', the power supply 31 is turned on, and when they are not connected, the plug 5 is turned on.
, 5' are disconnected from the sockets) 21 and 21', the power supply 31 is turned off. The drive circuit 33d is for activating the alarm device 34'.
A drive signal Psf corresponding to the input signal Pd is output. The alarm device 34 is a buzzer, for example, which operates in response to the drive signal Ps and generates an alarm. This main body 20 is firmly fixed at a predetermined position of a vehicle width (not shown), for example, a motorcycle.

When using an anti-theft device with such a configuration, first, the flexible strip 1 is wrapped around a strong structure (not shown) such as a telephone pole, and then the plugs 5 and 5' at both ends are connected to the sockets of the main body 20. 21, 21'.

When inserting the plugs 5, 5', the pins 23, 23' are pushed into the wall by the outer circumference of the plug. And plug 5,
5' is completely inserted into the socket) 21, 21', the pin 23, 23' is inserted into the plug 5,
The plugs 5, 5 protrude and fit into the notches 5c, 5c' of the plugs 5'.
21.21' That is, it is locked and fixed to the main body 20. In this way, the flexible member 1 is made into a loop shape,
The wheels are firmly tied to the telephone pole, etc.

In the above state in which the plugs 5, 5' are completely attached to the main body 20, the electric circuit 33 is in operation, and the original pulse signal Ph is transmitted through the optical fiber 2.

When the flexible strip 1 is not cut, the optical pulse signal Ph is transmitted to the light receiving cable 15, and the light receiving element 1
5 outputs a signal Pb.

Therefore, the above-mentioned AND condition of the signals Pta and Pc is satisfied, the disconnection detection circuit 33C does not output the signal Pd, and the alarm 34 does not operate.

However, when the flexible strip 1 is cut with a wire cutter or the like, the optical fiber 2 is also cut. Then, the output signal Pb of the light receiving element 15 becomes 0, the disconnection detection circuit 33c determines that there is an abnormality, and outputs the signal Pd. The drive circuit 33d outputs a drive signal Ps corresponding to the signal Pd to activate the alarm 34'.
IR is activated and an alarm is generated.

When the driver removes the flexible strip 1 from the main body 20, insert the key 2 into the keyhole 25a of the lock body 25 (FIG. 5) of the main body 20.
7 (Fig. 6) Insert ya- and rotate to off position t (Fig. 5). In this off position, the locking pin 23.
23' is pulled into the wall of the socket 21.21' through the notches 5c, sc' of the plug 5.5', and the locking relationship between these plugs 5, 5' and the socket 21.21' is released. . Therefore, the socket) 21, 21', that is, the main body 2
Plugs 5, 5' can be removed from 0. Also,
At this time, as described above, the power supply 31 is turned off and the alarm 34 does not operate. Set this to T±5 to prevent theft.

FIG. 8 is a diagram showing another embodiment of the flexible strip, in which a plug 5 is fixedly attached to one end 1a of the flexible strip L, and a small loop IC is attached to the other end 1b. is formed, and the end portion 1b is firmly caulked to the strip 1 by a caulking metal fitting 40. The flexible strip 1 is made up of a wire 3 (FIG. 9) in the same manner as described above, and in addition to the optical fiber 2, electric wires 41 and 42 are incorporated at the axial center of the wire 3. The plug 5 side is configured in the same way as described above, and has i41°42
One end of each is a connection terminal 10b of the connector 10.

It is connected to the ground terminal 10C, and the other end is connected to the output terminal 15b of the light receiving element 15 and the ground terminal 15C (FIG. 10). A substantially cylindrical bottomed capsule 43 is fixed to the end 3b of the wire 3 by caulking, so as to maintain the support 8' that aligns the end 2b of the optical fiber 2 and the light receiving element 15. It has become. The capsule 43 is filled with the filler 11 in the same manner as described above, and the supporting body 8 is firmly fixed within the capsule. This capsule 43
Like the plug 5, it is made of hard metal.

After this capsule 43 is inserted into the hole 40a of the caulking metal fitting 40, it is formed into a small loop lc (FIG. 8) 1, and the hole 40m is formed into a small loop lc (Fig. 8).
As shown in FIG. 10, it is inserted into the bottomed hole 4Ob arranged in parallel with the hole 4Ob, and is firmly fixed by caulking. The capsule 43 is made of hard metal and will not be crushed when it is caulked, and protects the internal support 8', the light receiving element 15, etc.

When using a flexible strip with such a configuration, the main body 20
114 may be provided with a socket t-i, for example, the socket 21. Of course, in this case, the connection terminals 22a, 22b, and 22C (Fig. 6) of the connector 22 are connected to the transmitting circuit 33m, the 5i transmitting circuit 33b, and the
Connect to each corresponding connection terminal (not shown) of the

When connecting to a vehicle utility pole, etc., first wrap the flexible strip 1 around the utility pole, then insert the plug 5 into the small loop IC, and then attach it to the main body 200 socket 21. . In other words, it is tied together with a thrown weave. When the flexible strip 1 having such a structure is used, the alarm 34 is activated not only when the optical fiber 2 is broken, but also when @41, 42, etc. are broken. Further, in this embodiment, the case where the device is used as a theft prevention device for wheels has been described, but the present invention is not limited to this, and it goes without saying that the device may be used for any appropriate object whose theft should be prevented.

In this embodiment, the case is described in which a wire is used as the flexible strip, but the invention is not limited to this, and a bendable tube made of hard metal without a substantially bellows shape is used. You may.

As explained above, according to the present invention, it is extremely difficult to form a detour path in order to detect the cutting of the flexible strip by using light. cutting can be almost certainly detected. In addition, since the length of the optical fiber used is almost the same as the total length of the flexible strip, the emitted light t
can be reduced, and unnecessary consumption of power can be prevented. Further, since the photoelectric elements disposed on the main body side and the flexible strip body side are electrically connected by a connector, there are advantages such as resistance to dirt and the like and ease of handling.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the flexible strip used in the anti-theft device according to the invention, FIGS. 2 and 3 are longitudinal sectional views of the plug shown in FIG. 1, and FIG. FIG. 3 is an end view of the plug, FIG. 5 is an external view showing an embodiment of the main body of the device of the present invention,
FIG. 6 is a sectional view of the main body shown in FIG. 5, FIG. 7 is a block diagram showing an embodiment of the electric circuit of the device of the present invention, and FIG. 8 is a diagram showing other flexible strips used in the device of the present invention. 9 and 10 are longitudinal sectional views of the plug and caulking portion shown in FIG. 8. DESCRIPTION OF SYMBOLS 1... Flexible strip, 2... Optical fiber, 3... Wire, 4... Coating, 5, 5'... Plug, 8, 8'
...Support, 9...Light emitting element, 10, 10', 22
, 22'... Connector, 15... Light receiving element, 20...
...Main body, 21.21'...Socket, 25...Lock body, 27...Key, 33...Electric circuit, 34...Alarm device, 40...Metal fitting for caulking, 41 ,42...@,
Line, 43...capsule. Applicant Honda Motor Co., Ltd. Honda Lock Co., Ltd. Agent Patent Attorney Satoshi Watanabe Disciple 1 Figure 2 Figure 5 Figure 6 Figure 7

Claims (1)

[Scope of Claims] 1. The light emitting device is housed in an optical storage housing within a flexible strip that is detachably attached to a housing fixed to an appropriate object to be prevented from theft by key operation, and drives the light emitting element. An anti-theft device comprising a connecting means for electrically connecting each of the elements to an electric circuit that detects a break in the optical fiber 1 based on a signal from a light-receiving element and activates an alarm. 2. The anti-theft device according to claim 1, wherein a light emitting element is disposed at one end of the optical fiber, and a light receiving element is disposed at the other end of the optical fiber.