JPS62295750A - Burglar prevention device for automobile - Google Patents

Abstract

PURPOSE:To obtain the desired results in burglar prevention by connecting a magnetic induction electro-motive force type switch detecting locking/ unlocking operations with both a contact type switch which is turned on accompanied with said locking/unlocking operations, and an alarming member which is actuated with said contact switch turned off. CONSTITUTION:In a cylinder lock 13 which is outfitted on a door main body and is locked/unlocked by a key plate, hole element switches 26 and 27 as a magnetic induction electro-motive force type switch detecting locking/ unlocking the lock 13 are provided. Said switches 26 and 27 are composed of hole element main bodies 28 and 29 and of current amplifying transistors Tr1 and Tr2, to which electro-motive force is inputted. And a contact type switch 30 is provided with both a moving side contact 36 mounted on the rotor of the cylinder lock 13 and a stationary contact 38 mounted on a switch cover 37, and is constituted to be turned on accompanied with locking/unlocking operations, but to be turned off in a range including a neutral position.

Description

[Detailed description of the invention] 3. Detailed description of the invention Industrial applications The present invention relates to an anti-theft device for an automobile.

Conventional automobile theft prevention devices include, for example, Japanese Patent Application Laid-Open No. 59-9127.
There are those shown in Japanese Patent No. 5 and tFf Publication No. 59-91277. Let's take this as an example of a car door.
This will be explained with reference to the drawings. Reference numeral 1 indicates the vehicle body, and 2 indicates a door as a component of the vehicle body, which is assembled via a hinge outside the opening 3 formed in the vehicle body 12, and includes a door body 4 and a window glass 5.
It is made up of 1.

Reference numeral 6 indicates a locking mechanism that maintains the closed state of the vehicle body 1 and the door 2, and the closing operation of the door 2 (- is made by a latch f8 etc. that engages the striker 7. An outside handle 9, an inside handle 10, a long knob 11, and a cylinder lock 13 are connected.

The cylinder lock 13 includes a housing 15 as an outer cylinder fixed to the door body 4, a rotor 16 as a cylinder rotatably attached to the housing 15, and a rotor 16 and the housing 15; The rotor 1B is provided with a plurality of tumblers (not shown) that pass through it, and by inserting a key plate (not shown in the figure) into the insertion opening 17 of the rotor 1B in the neutral position a, the housing by the plurality of tumblers is 15 and the rotor 16 are released, and the rotor 16
is from neutral position a to locked position b! : Rotated approximately 90 degrees in the direction of the arrow X, and also rotated approximately 90 degrees in the direction of the arrow Y (opposite to the direction of the arrow X) from the neutral position a to the developed position tic.
It's two. The engagement between the keep ply cuff and the run 'f-8 is maintained regardless of the opening operation of the outside handle 10, and the door 2 is held closed. Contrary to this, when the rotor 1B is rotated to the unlocked position C by the key plate, the lock a groove 6 is switched from locked to unlocked 1: and the engagement between the striker 7 and the latch 8 is changed to the outside handle. 9 or the inside handle 10 is released, and the door 2 is opened. Therefore, in this structure, the key plate is rotated to the locking position of the key insertion slot 17 (second insertion, neutral position jJa), then returned to the neutral position a, and the key plate is pulled out from the key insertion slot 17 in a series of locking steps. Operation (2) Therefore, the door 2 is locked by the locking mechanism 6.
It is possible to prevent theft by keeping it closed while maintaining the security. However, there are still cases where the lock mechanism 6 is unlocked and the door 2 is opened, resulting in theft.
unauthorized operation (
Therefore, an anti-theft device is known which is configured to issue an alarm when the door 2 is opened. 16 (with two magnets 19, cylinder lock 13
Reeds ins Y-20 and 21 constituting a magnetically sensitive non-contact switch are arranged near the stop position of the magnet 19 when locking and unlocking the cylinder lock 13, respectively.
When unlocking (the two magnets 19 do not touch the contacts 5 of the reed switches 20, 21, the reed switches 'f-20, 2
1 is the magnetic force of the magnet 19 (2, so it operates either on or off to detect whether the cylinder lock 13 is keyed or unlocked; 22 is a switch that detects opening/closing of the door 2); The reed switches 20 and 21 for detecting locking/unlocking and the switch 22 for detecting door opening/closing are connected to a control unit 23 as shown in FIG.
A warning member 24 such as a buzzer is connected to the output capo (23d) of the control unit 23 connected to the input capos (23a, 23b, 23cm). This control unit 23 includes, for example,
When the reed switch 20 on the locking side is turned on, the potential of the output boat 23d is set to high level (if set to 2, C2,
When the reed switch 21 on the unlocking side is turned on, the potential of the output capacitor (23d) is set to a low level C2.The memory circuit is composed of a combination of a flimbu flop, a non gate, an AND gate, an OR gate, etc. . That is, the control unit 23 controls the door open/close detection switch f22 during the period from when the lead switch f 20 +2 lock detection signal is applied until the unlock detection signal from the lead switch 721 is applied.
When the door amount detection signal is supplied, the praise member 2
It supplies output to 4 and issues a 0 signal.

Problems to be Solved by the Invention However, in the latter anti-theft device described above, when the door 2 is closed and the cylinder lock 13 is locked, applying a υC magnet around the cylinder lock 13 from outside the vehicle will solve the problem. The lead-in 'f-21 on the lock side is activated and an unlocking detection signal is supplied to the control unit 23. For this reason,
Without unlocking the cylinder lock 13 with the key plate, apply a magnet (not shown) to the cylinder lock 13 from outside the vehicle, activate the reed switch 21 on the unlocking side, and activate the warning control by the control unit 23. After unlocking, there is a risk that door 2 will be opened by the above-mentioned unauthorized operation (-) and theft will occur.

In addition, the leads f20 and f21 are so-called contact type that operate on/off by opening and closing the sealed contacts in the glass container by the magnetic force of the magnet 19.However, the controller 23 is a TTL (Transistor Tra>5
istor Logic) and DTL (Diode
It is located within a section consisting of a logic circuit such as a transistor logic circuit that can be driven by a weak current. For this reason, the controller unit 23 may malfunction depending on the magnitude t2 of the pulsating flow that occurs during on/off operation.

Therefore, in place of the reedsin j20.21, that is, the magnetically sensitive non-contact type switch, for example, a magnetic electromotive force type switch that is a non-contact/non-contact type such as a Hall element (2) Although it is possible to detect the key position, in order to generate a Hall electromotive force due to the magnetic field of the magnet, a single current of a minute element is constantly passed through the Hall element, so if this is installed in a car, The discharge life of the battery is short and it is difficult to adopt it suddenly.

Therefore, the present invention can improve theft prevention by issuing an alarm when the door is opened without going through the regular unlocking operation of the locking mechanism, and can also prevent malfunctions caused by pulsating current C2. Furthermore, it is an object of the present invention to provide an anti-theft device for an automobile that can suppress shortening of the discharge life of a battery.

Means for Solving the Problems The present invention provides a magnetically sensitive electromotive force type switch that detects either locking or unlocking operation, and a magnetically sensitive electromotive force type switch that detects the locking or unlocking operation. A contact type switch that is turned on when operated and turned off within a range including the neutral position is connected to a warning member that ensures a warning when the contact type switch is in the off state.

When the locking mechanism is in the locked state, even if the magnetically sensitive electromotive force switch is illegally activated by exposing it to a magnet from outside the vehicle, the contact switch will remain OFF and will alert you to theft of your vehicle. Ensure warning control. At the time of the on/off operation of the contact type switch, the &1iff sensitive electromotive force type switch is turned off to prevent the influence of pulsation due to the on/off operation f2 of the contact type switch. In the magnetically sensitive power type switch i2, an element current flows only when the locking or unlocking operation of the locking mechanism is detected.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings and the same parts as the conventional structure (with the same reference numerals).

1 to 4, this anti-theft device locks and unlocks a door 21 constituting a vehicle body component; a cylinder lock 13 as a locking mechanism to be assembled using a key sheet (not shown); C: Therefore, the basic structure, such as the point of locking and unlocking the locking mechanism B and the point of warning control by the control unit 23 based on the locking/unlocking detection signal of the cylinder lock 13, is the same as that of the conventional machine.

Here, as shown in FIGS. 1 and 2, the magnetic sensitive electromotive force type switches for detecting the locking/unlocking operation of the cylinder lock 13 are configured as Hall element switches 26 and 27. These Hall element switches 26 and 27 each include Hall element bodies 28 and 29, and Hall element bodies 28 and 27, respectively.
, 29, respectively, are current amplifying transistors Try and Tr2 that receive the Hall electromotive force as input. Each hall element switch 26 has a tangential switch f3
0 are connected in series.

A state f in which the contact type switch 30 is turned on and element current is flowing through the Hall element bodies 28 and 29.
2, when the Hall element main body 28 (2 magnetic field acts to generate a Hall electromotive force, the current due to this Hall electromotive force C2 turns on the base of the transistor Tr (2) and the Hall element switch y'-26 turns on. When activated, the collector current of the transistor Tr is supplied to the control unit 23 as a locking detection signal.Similarly, the contact type switch f30 is turned on and the Hall element main body 28 , 29 + - In the state where the element current is flowing, when the Hall element main body 29 (two magnetic fields act to generate a Hall electromotive force, the current due to the Hall electromotive force flows to the pace of the transistor Tr2 and the Hall element switch 27 is turned on, and the collector current of the transistor Tr2 is supplied to the input port 23b of the control unit 23 as an unlock detection signal.On the other hand, as shown in FIGS. The rear end surface of the rotor IB is provided with a large diameter portion 31 that protrudes rearward from the center portion of the rear end surface g(
A support shaft portion 32 having a smaller diameter than the large diameter portion 31 is protruded from the rear end simplified central portion C2 of 531. Left and right convex portions 33 are provided protruding rearward from the circumferential surface of the large diameter portion 31. This left and right convex portion 3
3 and the circumferential surface of the support shaft 32 (2 is the required clearance 3
4 is set. A closed annular groove 35 is formed on the peripheral surface (2) of the distal end portion of the distal end portion 32 of the support shaft portion 32 .

The large diameter portion 31, the support shaft portion 32, and the left and right convex portions 33 are made of solid wood. Further, the above-mentioned contact type swing f30 includes a movable contact 36 attached to the rotor 16 of the cylinder lock 13 and a fixed contact 38 attached via the housing 15 (varnish inch cover 37) of the cylinder lock 13. The locking/unlocking operation of the lock 13 (the two Hall element switches F26, 27 are turned on within the required range including the detection area (locking/unlocking position c), and the required range including the neutral position a) The movable contact 36 has a mounting portion 39 and movable contact portions 40 and 41 extending from the mounting portion 39 to the left and right sides at approximately equal distances from the center of the mounting portion 39. An insertion hole 42 is formed in the approximate center of the mounting portion 39, and left and right recesses 43 are cut out at the edges of the insertion hole 42. Part 32 + spiral spring 44
After externally fitting the mounting part 39 through the clearance 34, the support shaft part 32 is passed through the insertion hole 42 of the mounting part 39, and the left and right concave parts 43 of the mounting part 39 are fitted to the left and right convex parts 33. With the closed annular groove 35 of the support shaft portion 32 also positioned toward the large diameter portion 31 side, the closed annular groove 35 (two retaining rings 45 are attached) (therefore, the spring 44 moves the closed annular groove 35 toward the fixed contact 38 side). When the rotor 1 is energized and the support shaft 32 (in a state where it cannot rotate)
The fixed contact 38 is installed so that it can rotate twice together with the movable contact 36.
On the inner bottom surface C2 of the insulating board 46 to be attached (2. Fixed contact part 4
7, 48 and a plurality of contact parts 49.50.51.5
2.53.54.55.56) IJ tube wiring section 5
7.58.59 A printed circuit board (=consisting of.Specific (
2. When the cylinder lock 13 is locked or unlocked, the fixed contact portions 47 and 48 are in the operating state when the cylinder lock 13 is locked or unlocked. Two contact portions 49 of the contact portions 49 to 5B are arranged on both sides of one fixed contact portion 47 of these fixed contact portions 47 and 48. , 50 are connected to each other via stop wiring portions 57 and 58.One contact portion 4 of these two contact portions 49 and 50
9F- is the input terminal 2 of the hall element switch y-26 on the locking side.
6a is connected. A contact portion 51 that faces the contact portion 49 in the circumferential direction has a Hall element swing f.
26 ground ends 26b are connected. Contact part 4
The contact portion 53 located at 9 + 511'el has a
The output end 26c of the Hall T'a switch 26 is connected to one end of an electric wire 60 connected to the input port 23a of the control unit 23. Further, the input end 27a of the Hall element switch t27 on the unlocking side is connected to the other contact portion 50+2. This contact part 50
The ground end 27b of the Hall element switch 27 is connected to the contact portion 52f- which faces each other in the circumferential direction. Between the contact parts 50 and 52 (two contact parts 54 (
2, the output end of the Hall element switch f27 and the input port 23bc of the control unit 23 are connected to one end of the electric wire 61 for suction. Each of the Hall element bodies 28 and 29 of the Hall element switches 26 and 27 can be locked/unlocked by the key plate of the cylinder lock 13 (2). A to the unlocked position C, the contact portion 55 is located at a position where a Hall electromotive force is generated by the magnetic force of the magnet 19 which is rotated and stopped. The contact portion 56 is connected to the outer edge of the fixed contact portion 48.
5゜56 Each f2 is a bunch IJ B (two connecting electric wires 62゜63 are connected at one end.These electric wires 60
The other end of ~63 is inserted into the switch cover 37 from between the back surface of the fixed armature 38 and the inner bottom surface of the switch cover 37 via the insertion hole B4 in the bottom center of the switch cover 31.
It is pulled out to the outside. The fixed contact 38 has an insertion hole 64 (two through holes) from the inner bottom surface side of the switch cover 37, which is the other end of each of the electric wires 60 to 63 connected to the fixed contact 38.
Sinch force par 37 in the middle part of these lines 1160-63
A locating recess 65 that is interposed between the inner bottom surface and the back surface of the fixed contact 38 and the circumferential surface of the fixed contact 38 (two notches formed
Locate convex portion 66 that protrudes across the inner wall surface of the switch cover 37 in the axial direction! While fitting the two, the fixed contact 38
to the inner bottom surface of the switch cover 37, and attach the mounting pin 67 protruding from the inner bottom surface of the switch cover 37 to the fixed contact 3.
Mounting hole 68I formed in 8; insert this mounting hole 67
The tip protruding from the fixed contact 38 is crushed (-therefore, the switch cover 371 is fixed).

The switch cover 37 to which this fixed contact 38 is fixed is
While fitting the front half of the locating convex part 66 into the rear part of the circumferential surface of the housing 15 of the cylinder lock 13 (the locating recess 89 formed with two notches), the tip opening of the switch cover 37 is fitted into the rear part E of the housing 15 in contact with the two recesses, Suintekapa 37 outer periphery C (2 protruding flange portions 70) - Uji puffer 15 outer periphery C (2 protruding flange portions 11) (fastened with Ni bolts 72 (2, therefore, the cylinder lock 13) is fixed to the uzing 15. Note that 73 is a spindle escape hole formed approximately at the center of the insulating substrate 46, and 74 is a surge absorption circuit.

The operation of the structure of the above embodiment will be explained.

(1) For locking the cylinder lock 13 With the cylinder arm 13 in the neutral state C2 shown in FIG. 2, insert the key plate (not shown) into the rotor 1B and rotate it in the direction of the arrow X. , the movable contactor 36 rotates from the position shown by the solid line to the position shown by the dashed-dotted line, with the rotation of the rotor 1B 32, as shown in FIG.
At this dot-dash line position, the movable contact parts 40 and 41 are in three contact with the fixed contact parts 47 and 48 terminals, and the contact type switch 30
is turned on.

Subsequently, the rotation of the key plate in the direction of the arrow (the position where the rotor 16 of the cylinder lock 13 has rotated to the locked position), and the contact type swing f3
0, the magnet 19 on the rotor 16 approaches the locking side Hall element switch 2B with a required gap, and the Hall element switch f26 is turned on by the magnetic force of the magnet 19. As a result, the Hall element swing f2
The lock detection signal B is supplied to the control unit 23, and the control unit 23 is set to a warning control state.

Here, the row in the cylinder lock 13, a of J16
It will be obvious that the rotation to the locked position Ilb switches the locking mechanism 6 from unlocking to locking, the engagement between the striker I and the run f8 is maintained, and the door 2 is placed in the closed state C2. After that, when the locking position bC - a certain key plate is rotated in the direction of the arrow, the movable contact portion 4 moves from the dot-dashed line position to the solid line position.
0 and 41 are separated from the fixed contact parts 47 and 48, and the contact type swings in? 30 is turned off. Subsequently, when the key plate rotates in the Y direction and stops at the neutral position ta, the movable contactor 3B returns to the state shown by the solid line.This neutral position fi
The key plate is removed from the key insertion slot 17 in step a, and the series of locking operations of the cylinder lock 13 is completed by step C2.

(2) When unlocking the cylinder lock 13, the key insertion slot 17 is in a neutral state! = By inserting the key plate and rotating it in the direction of arrow Y, the movable contact 36 moves to the fourth position.
It rotates from the solid line position to the dotted line position shown in Figure 2, and the contact type swing f30 is turned on at this dotted line position.By the subsequent rotation of the key plate in the Y direction, the movable contact portion 40,
41 slides on the fixed contact parts 47 and 48 from the dotted line position to the imaginary line position, and the magnet 19 slides over the unlocking side Hall element f27.
The Hall element switch 27 is turned on, and the unlock detection signal is transmitted to the control unit with a required gap.The warning control state of the control unit 23 described in (1) is canceled. here,
The rotor 16 of the cylinder lock 13 rotates to the touch lock position C,
The lock mechanism B is switched from locked to unlocked (two-way switching), and by operating the outside handle 9 from the outside of the vehicle, the engagement between the striker 7 and the run f8 is released.
Door 2 can now be opened. Then, the key plate is rotated in the direction of arrow X from the unlocked position C and removed from the key insertion slot 17 at the neutral position a, thereby completing a series of unlocking operations for the cylinder lock 13. At this time, when the movable contact 36 moves from the dot position to the solid line position, the movable contact part 40
゜41 is separated from the fixed contact portions 47 and 48, and the main +30 is in off-ty motion 9, and the movable contactor 3B is moved as it is.
returns to the solid line position.

(3) In the case of an unauthorized unlocking operation After the locking operation described in (1) above and before the unlocking operation described in (2) above, place a magnet from outside the vehicle on the 13th turn of the cylinder lock. Even if the Hall element swing y-27 is turned on, the contact type swing P30 is turned off during the return from the locked position ib to the neutral position a in (1) above, so the Hall element swing ' On operation of f-27 ≦; The unlocking detection signal is detected by the control unit 23.
i2 will not be supplied. When the door 2 is in the locked state, the Hall element switch 27 on the unlock side
Even if the cylinder lock 13 is turned on illegally, the warning control set by the control unit 23 can be ensured by locking the cylinder lock 13. As a result, after turning on the Hall element switch 27 on the unlocking side using a magnet from outside the vehicle,
If the door 2 is opened by illegally releasing the lock mechanism 6, an alarm can be issued.

Further, according to the structure of the embodiment (2), as shown in FIG. (Since the contact type switch 30 consisting of the movable contact 36 attached to the rotor 16 and the fixed contact 38 attached to the housing 15 is housed, the waterproofness of the contact type switch 30 can be ensured. In other words, Even if water that has entered the door body 4 from the door waist portion 18 covers the contact switch 30, the water is prevented from entering the space 74 by the switch cover 37 and the housing 15. , the movable contactor 3B and the fixed contactor 38 will not be exposed to water.

Moreover, if we look at the contact type switch 300 assembly C, we can see that the movable contact 3B is attached to the rotor 18 and (-
, Hall element switches 26, 27 and 'N@60~63
After attaching the heavy fixed contact 38 with the required electric components such as the above to the switch cover 31, the switch cover 37 is fastened to the housing 15L with the bolts 72. Thus, the contact type switch 30 is attached to the cylinder lock 13. It can be assembled, and the assembly is easy ■: It becomes.

In the embodiment C2, the Hall elements j26 and 27 are illustrated and explained as the magnetically sensitive electromotive force type spin t, but the same effect can be obtained even if the magnetic head is used for reading.

The present invention can also be applied to a locking mechanism such as a cylinder S'G in a trunk lint (2, key plate (2), so that only one of locking and unlocking operations can be performed.

Effects of the Invention As described above, according to the present invention (2), even if the magnetically sensitive force-type switch is illicitly activated by applying a magnet from outside the vehicle in a locked state, the contact-type switch is turned off. As a result, it is possible to secure a warning control that notifies you of theft of a car that has been set up electrically by the locking operation.As a result, it is possible to secure the door, trunk lint, etc. without going through the regular unlocking operation of the locking mechanism. If the opening/closing body is opened, an alarm can be issued, thereby improving theft prevention.Moreover, the switch that detects the locking/unlocking operation of the locking mechanism is a non-contact/non-contact switch. Since the switch is configured as a magnetically sensitive electromotive force type switch, it is possible to prevent malfunctions due to pulsating currents that occur when the switch is turned on and off. When the sensitive electromotive force type switch is turned off, it is possible to prevent the influence of pulsating current caused by the on/off operation of the contact type switch.In addition, the magnetically sensitive electromotive force type switch has a locking mechanism that can be locked and unlocked. Contact type switch C that turns on and off as the device moves on and off; therefore, the element current flows only when the locking or unlocking operation of the locking mechanism is detected, so it is possible to suppress shortening of the battery's discharge life. There are new effects such as

[Brief explanation of the drawing]

Fig. 1 is an electric circuit diagram showing an embodiment of the present invention, Fig. 2 is an exploded perspective view of the embodiment, Fig. 3 is a sectional view of the embodiment in an assembled state, and Fig. 4 is an electrical circuit diagram showing an embodiment of the present invention. The figure is an explanatory diagram of the operation of the present invention.
FIG. 5 is a schematic configuration diagram showing a conventional anti-theft device for automobiles, and FIG. 6 is an electric circuit diagram of the conventional example. 2...Door (vehicle body component), 13...Cylinder lock (
locking mechanism), 26.27... Hall element switch (magnetic sensitive electromotive force type swing f), 30... contact type switch. Figure 1 2'2 Figure 3 Figure 4

Claims (1)

[Claims] A magnetically sensitive electromotive force type switch detects either locking or unlocking operation, and this magnetically sensitive electromotive force type switch is turned on when the locking or unlocking operation is performed, and turned off within a range including the neutral position. An anti-theft device for an automobile, characterized in that a contact type switch is connected to a warning member that ensures a warning when the contact type switch is in the OFF state.