WO2002036912A1

WO2002036912A1 - Lock system

Info

Publication number: WO2002036912A1
Application number: PCT/JP2001/006694
Authority: WO
Inventors: Tsugio Saito
Original assignee: Tsugio Saito
Priority date: 2000-10-31
Filing date: 2001-08-03
Publication date: 2002-05-10
Also published as: JPWO2002036912A1

Abstract

A lock system, characterized by comprising a first lock (1), a second lock (2), unlocking prevention means (2a, 4) preventing the second lock (2) from being unlocked, unlocking prevention releasing means (7, 8) releasing the function of the second lock (2) unlocking prevention by the unlocking prevention means (2a, 4) according to the unlocking operation of the first lock (1), and unlocking prevention release state holding means (9, 10a, 10b, 10c, 12, 50) holding, for a specified period, the state where the function of the second lock (2) unlocking prevention is released.

Description

Description Key system Technical field

The present invention relates to a key system for preventing unauthorized unlocking, which is provided on a vehicle, a motorcycle, a vending machine, a door of a building, or the like, and prevents unauthorized unlocking. Background art

Hitherto, as a countermeasure against theft and crime, key systems using computer control such as a fingerprint / voiceprint recognition type, a card type, and an infrared remote control type have been developed. However, because the above-mentioned key system is expensive, low-cost cylinder locks (single or multiple) are generally used as anti-theft and security measures.

However, there is a problem that the conventional cylinder lock is easily unlocked by a special tool for unauthorized unlocking without using a duplicate key. Another problem is that conventional cylinder locks are easily unlocked by being pryed open or broken through the keyhole. Another problem is that conventional cylinder locks can be unlocked using duplicate keys using special tools made of advanced technology.

The present invention has been made in view of the above points, and has as its object to provide a low-cost key system for preventing unauthorized unlocking. Disclosure of the invention

The key system according to the present invention includes a first lock, a second lock, an unlocking prevention means for preventing unlocking of the second lock, and unlocking in response to an unlocking operation of the first lock. Prevention it Means for unlocking the second lock by means of unlocking, and unlocking prevention releasing state holding means for holding the unlocked state of the second lock for a predetermined period. It is characterized by doing.

According to the present invention, the second lock cannot be unlocked during a period other than the predetermined period during which the unlocking prevention of the second lock is released by the unlocking prevention release state holding means. Unauthorized unlockers must unlock the two locks within this predetermined period, making it difficult to unlock without using a duplicate key.

In the above-described key system, the unlocking prevention means may include a recess formed in the second lock, and a lock that is fitted into the recess to fix the movement of the second lock from the locked position to the unlocked position. It is preferable that the unlocking prevention means prevents the unlocking of the second lock by fitting the lock rod into the concave portion.

In the above-described key system, the unlock prevention / release means is constituted by a cam roller that rotates together with a rotating shaft that rotates by an unlocking operation of the first lock, and a cam drive unit that is driven according to the rotation of the cam roller. The unlocking prevention releasing means may release the second unlocking prevention by removing the lock rod connected to the cam driving unit from the recess in response to the driving of the cam driving unit. preferable.

In the above-mentioned key system, the unlocking / unlocking state holding means is a mechanism for winding up the first lock in accordance with the movement of the first lock from the locked position to the unlocked position; The mainspring mechanism is wound up in the unlocking / preventing / unlocking state holding means in response to the movement of the first lock from the first locking position to the unlocking position by the unlocking operation. When the engagement means engages with the cam driving portion, the second lock is kept unlocked, and after a predetermined period of time, the lock is engaged according to the operation of the mainspring mechanism. The unlocking of the second lock is preferably prevented by disengaging the engagement means from the cam drive unit and fitting the lock rod into the recess.

Further, in the key system described above, the first lock and the second lock are cylinder locks, and a first detection means for detecting that an object has been inserted into a keyhole of the first lock; Unlock prevention means, comprising: second detection means for detecting that an object has reached the deepest part of the keyhole of the lock; and third detection means for detecting that the first lock has been unlocked. However, it is preferable to release the unlocking prevention of the second lock according to the detection result by the first to third detection means.

In this case, the unlocking prevention releasing means releases the unlocking prevention of the second lock according to the detection result of the second detecting means. The first lock must be released while the second detection means provided in the first reaction is being reacted, that is, while the special tool is fixed at the deepest part of the keyhole of the first lock. Correct unlocking becomes difficult.

Further, in the above-described key system, the light-emitting means which emits light in the keyhole of the first lock and the light-emitting means are arranged opposite to each other with the keyhole of the first key interposed therebetween in accordance with the detection result by the first detection means. Light detecting means for detecting light in the keyhole of the first lock emitted by the light emitting means. It is preferable to release the lock from unlocking.

In this case, the unlocking prevention releasing means must use a special tool that covers the entire keyhole in order to release the unlocking of the second lock according to the detection result by the light detecting means. Correct unlocking becomes difficult. This is because the key for the first lock covers the front of the keyhole, but the special tool is made thin and thin due to its specialty, so even if it is inserted into the keyhole, it blocks all light from the side This takes into account the inability to do so.

Further, in the above-described key system, the first to third detecting means It is preferable to include shielding means for shielding the inside of the keyhole of the first lock according to the detection result.

In this case, the shielding means shields the inside of the keyhole of the first lock in accordance with the detection result by the first to third detection means. Can be prevented from being pryed open or crushed.

In the above-described key system, the unlocking prevention means includes an insertion prevention unit that prevents insertion of an object into the keyhole of the second lock, and a rotation prevention unit that prevents rotation of the cylinder frame of the second lock. It is preferable that the unlocking prevention releasing means be provided to release the unlocking of the second lock by controlling the insertion preventing part and the rotation preventing part.

In this case, the insertion prevention unit and the rotation prevention unit are configured to interlock with each other.Therefore, the insertion prevention unit refuses entry of an object into the keyhole of the second lock, and the rotation prevention unit detects the second lock. When the rotation of the cylinder frame of the lock 2 is refused, it becomes difficult for an unauthorized unlocker to forcibly open the insertion prevention part using a special tool or the like.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an overall configuration diagram of a key system according to an embodiment of the present invention. FIG. 2 is a flowchart showing an operation of unlocking a key system provided on a door of a building according to an embodiment of the present invention.

FIG. 3 is a time chart showing an operation of unlocking the key system provided on the door of the building according to the embodiment of the present invention.

FIG. 4 is an overall configuration diagram of a key system according to an embodiment of the present invention. FIG. 5 is a cross-sectional view of the first cylinder lock in the key system according to one embodiment of the present invention.

FIG. 6 shows the first syringe in the key system according to one embodiment of the present invention. It is a longitudinal section of a dowel lock.

FIG. 7 is a flowchart showing the operation of unlocking the key system provided in the vehicle according to the embodiment of the present invention.

FIG. 8 is a configuration diagram of a control circuit for a key system provided in a vehicle according to an embodiment of the present invention. .

FIG. 9 is a time chart illustrating an operation of unlocking the key system provided in the vehicle according to the embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

(Configuration of the key system according to the first embodiment)

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a key system according to the present embodiment.

Figure 1 shows the building on the left and the building door on the right. The key system according to the present embodiment is provided on a door of a building. First lock (first bolt) A state in which the first lock 1 is fitted into the recess 1A provided in the building in response to the unlocking operation of the first lock 1 using the key for 1. From the locked position to the unlocked position that is out of the recess 1A provided in the building. Similarly, in response to the unlocking operation of the second lock 2 using the key for the second lock 2, the second lock 2 is in a state of being fitted into the recess 2A provided in the building. Move from the locked position to the unlocked position that is out of the recess 2A provided in the building. The key system according to the present embodiment unlocks the second lock 2 within a predetermined period after unlocking the first lock 1 (moving the first lock 1 to the unlock position). By moving the lock 2 to the unlock position, the door of this building can be opened.

The key system according to the present embodiment includes a first lock, a second lock, an unlocking prevention unit for preventing unlocking of the second lock, and an unlocking operation in accordance with an unlocking operation of the first lock. Tablets An unlocking prevention releasing means for releasing the unlocking of the second lock by the preventing means; and an unlocking releasing state holding means for holding the unlocked state of the second lock for a predetermined period. It is characterized by doing. Specifically, as shown in FIG. 1, the key system according to the present embodiment includes a first lock 1, a second lock 2, a lock bar 4, a cam drive unit 7, a cam roller 8, It comprises a hook 9, a hairspring 10a, a balance 10b, a gear 10c, a start reset mechanism 50, and a trip gear 12.

In the key system according to the present embodiment, the hook bar 4 and the concave portion 2 a formed in the second lock 2 constitute unlocking prevention means, and the cam drive unit 7 and the cam opening collar 8 are The unlocking prevention releasing means is constituted, and the hook 9, the trip gear 12, the hairspring 10 a, the balance 10 b, the gear 10 c, and the start reset mechanism 50 are provided to hold the unlocking prevention releasing state. Is configured. The hairspring 10a, the balance 10b and the gear 10c constitute a mainspring mechanism, and the hook 9 constitutes an engaging means.

The first lock 1, and a hook portion la, a rotating shaft, a linkage portion 3 A _2, and the cam roller 8 is provided. The hook portion la is provided below the first lock 1 and responds to the rightward movement of the first lock 1 (unlocking operation, that is, movement from the locked position to the unlocked position). Then, the orbiting portion 50b of the start reset mechanism 50 is moved rightward. The rotating shaft is provided, for example, at the center of the first lock 1 and is linked to an unlocking operation using a key (not shown) for the first lock 1 inserted into a keyhole (not shown). It rotates. Association unit 3 A ₂ is connected to the rotary shaft 3, the rotational motion of the rotating shaft 3 Engineering, movement between the first motion (locked position and Kaijoi location in the lateral direction of the lock 1 ). The cam roller 8 is attached to the rotating shaft 38 and rotates in conjunction with the rotating shaft 3. The cam roller 8 is installed so as to contact the cam driving unit 7 at a predetermined position. That is, the cam drive unit 7 is rotated between a dotted line state and a solid line state.

The second tablet 2, the rotary shaft 3 B _2, and the associated portion 3 B ₂ are provided. The second lock 2 has a first recess 2a into which the lock rod 4 is loosely fitted when the second lock 2 is in the locking position, and a second lock 2 in the unlocked position. A second concave portion 2b into which the stick 4 is loosely fitted is formed. Even when the lock bar 4 is loosely fitted in the second recess 2b, the second lock 2 can be moved to the left. The rotating shaft 38 is provided, for example, at the center of the second lock 2 and is used for unlocking operation using a key (not shown) for the second lock 2 inserted into a keyhole (not shown). It rotates in conjunction with it. Association unit 3 B ₂ is connected to the rotary shaft 3, the rotational motion of the rotating shaft 3 B, and converts the horizontal direction of movement of the second lock 2. The first lock 1 is provided above the second lock 2.

The lock rod 4 is connected to the distal end 7 b of the cam drive 7 via a wire 6, and moves up and down in conjunction with the movement (rotation) of the cam drive 7, and the second lock 2 is moved. In the state where the second lock 2 is loosely fitted in the first recess 2a (solid line state), the rightward movement of the second lock 2 (unlocking operation, that is, the movement from the locked position to the unlocked position) is fixed (suppressed). Is what you do. The lock rod 4 is attached to the spring part 5. Since the lock rod 4 receives a downward biasing force from the spring part 5 in the dotted line state, when the cam drive part 7 and the hook 9 are disengaged, the lock rod 4 moves downward, and the second lock 2 Is loosely fitted into the first concave portion 2a of the first portion (in a solid line state).

The cam drive unit 7 is connected to the lock rod 4 via a wire 6 from a distal end 7b, and rotates between a dotted line state and a solid line state around the support shaft 7a in conjunction with the rotation of the cam roller 8. The thing that moves (the thing that rotates). The cam drive unit 7 is usually in a solid line state. Also, the cam drive unit 7 is in a dotted line state. Is installed to engage with the hook 9 when the When the cam drive unit 7 is in the dotted line state, the lock rod 4 is in the dotted line state, the loose fit between the lock rod 4 and the first recess 2 a of the second lock 2 is released, and the second lock 2 You can move in any direction. Conversely, when the cam drive unit 7 is in the solid line state, the lock rod 4 is in the solid line state, the lock rod 4 and the first recess 2a of the second lock 2 are loosely fitted, and the second lock 2 But cannot move to the right.

The hook 9 is driven (kicked) by a tenon inserted into a time setting hole 12 a provided in the trip gear 12, and is engaged with the cam driving unit 7 at a predetermined position. Things. The trip gear 12 rotates counterclockwise, the hook 9 is kicked by the tenon, and the cam drive 7 and the hook 9 are disengaged.

The trip gear 1 2 is provided with a time setting hole 12, and the rotation axis of the trip gear 12 is connected to the orbital section 50 b of the start / reset mechanism 50 via a wire 60. Have been. The trip gear 12 is in contact with the gear 10c. When the orbiting portion 50b of the reset mechanism 50 moves rightward, the trip gear 12 receives the power via the wire 60 and rotates clockwise (from the initial state). Shift to the time set state), and rotate the gear 10c counterclockwise.

Also, the trip gear 12 rotates counterclockwise according to the torque generated by the clockwise rotation of the gear 10c (shifts from the time set state to the initial state). .

A plurality of time setting holes 12 are provided so that a tenon can be inserted. By changing the time setting holes 1 and 2 for inserting the tenon, from the time setting state until the inserted tenon kicks the hook 9 (that is, the engagement between the cam drive unit 7 and the hook 9 is released). Time can be adjusted. The hairspring 10a is connected to the rotating shaft of the gear 10c, and is wound up by the rotation of the trip gear 12 and the gear 10c in response to the rightward movement of the orbiting portion 50b. It is. The hairspring 10a rotates the gear 10c clockwise when returning from the wound up state to the initial state. Another spring mechanism may be used in place of the hairspring 10a.

The balance 10b is connected to the gear 10c and adjusts the rotation speed of the gear 10c by air resistance or the like.

The gear 10 c is in contact with the trip gear 12, and transmits the clockwise rotating force generated by the hairspring 10 a to the trip gear 12. The gear 10 rotates counterclockwise in response to the clockwise rotation of the trip gear 12 to wind up the hairspring 10a.

The start reset mechanism 50 is constituted by a circulation passage 50a and a circulation portion 50b.

The circling portion 50b is provided in the circulating passage 50a. In the initial state, the orbiting section 50b is at the upper left in the orbiting passage 50a as shown in FIG. 1 (solid line state). Then, during the locking operation of the first lock 1, the orbiting portion 5 O b is moved rightward from the initial state by the hooking portion 1 a through the upper side of the orbiting passage 50 a by the hook portion 1 a, and the time setting state (Dotted line state). Thereafter, when the trip gear 12 returns from the time-set state to the initial state, the orbiting portion 5 Ob receives the rotational force generated by the rotation of the trip gear 12 through the wire 60, and Return to the initial state through the lower side of 0a.

(Operation of the key system according to the first embodiment)

The operation of the key system having the above configuration will be described below. Figure 2 shows the building And FIG. 11 is a front view showing a procedure for unlocking the key system according to the present embodiment provided on the door. As shown in FIG. 2, in step 101, a person having a key (first key) for a first lock 1 provided on a door of a building is operated by a keyhole of the first lock 1 (shown in FIG. 2). Insert the first key and rotate the rotating shaft 3 clockwise. In step 102, in conjunction with the rotation of the rotating shaft 3, the cam roller 8 rotates clockwise, comes into contact with the cam drive unit 7, and changes the cam drive unit 7 from a solid line state to a dotted line state. Then, the cam drive unit 7 and the hook 9 are engaged.

In step 103, an upward force is applied to the lock rod 4 via the wire 6 by the upward movement of the distal end 7b of the cam drive unit 7, and the lock rod 4 moves upward. (Shift) and comes out of the first recess 2 a of the second lock 2.

On the other hand, in step 104, the first lock 1 ^ moves rightward in conjunction with the rotation of the rotating shaft 3.

In step 105a, in response to the rightward movement of the first lock 1, the orbiting section 50b moves rightward above the orbiting passageway 50a, thereby setting the time from the initial state. Then, the start reset mechanism 50 shifts from the initial state to the time set state.

Further, in step 105a, the trip gear 12 rotates clockwise in response to the rightward movement of the orbiting section 50b, and shifts from the initial state to the time set state.

In step 105b, the gear 10c rotates counterclockwise in response to the clockwise rotation of the trip gear 12 to wind up the hairspring 10a.

In step 106, the rotation generated by the hairspring 1 0a In response to the clockwise rotation of the gear 10c in response to the force, the trip gear 12 contacting the gear 10c rotates counterclockwise.

In step 107, in response to the counterclockwise rotation of the trip gear 12, the orbiting portion 50 b is moved leftward below the orbiting passage 50 a and returns to the initial state. ''

In this state, whether or not the second lock 2 can be moved rightward, that is, whether or not the second lock 2 can be unlocked, is determined based on whether or not a predetermined period has elapsed. (Step 108). Here, the predetermined period is defined as the time when the gear 10 c rotates clockwise and the trip gear 12 rotates counterclockwise from the time when the cam drive unit 7 and the hook 9 are engaged. The tenon inserted in the hole 1 2a kicks the hook 9, the cam drive 7 and the hook 9 are disengaged, the force drive 7 returns to the solid line state, and the lock rod 4 moves again. It refers to a period until the second lock 2 is loosely fitted in the first recess 2a. Before the predetermined period has elapsed, since the lock rod 4 has been removed from the first concave portion 2a of the second lock 2, the second lock provided on the door of the building in Step 109 The person holding the key for the lock 2 (second key) inserts the second key into the keyhole (not shown) of the second lock 2, and rotates the rotation shaft 3. Move lock 2 to the right to unlock the door of this building (normal end).

Conversely, after a lapse of a predetermined period, in step 110, the engagement between the drum drive unit 7 and the hook 9 is released, and the lock rod 4 is again moved to the first recess 2 of the second lock 2. Since it is loosely fitted in a, even if a person having a key for the second lock 2 (second key) inserts the second key into the keyhole of the second lock 2, The second lock 2 cannot be moved to the right, and the door of this building cannot be unlocked (abnormal termination of step 110).

Fig. 3 is a time chart showing the operation of the key system having the above configuration. It is. As shown in Fig. 3, when the person holding the key for the first lock 1 provided on the door of the building inserts this key into the keyhole of the first lock 1 (step 101 in Fig. 2). From the time when the lock rod 4 shifts upward and disengages from the first concave portion 2a of the second lock 2 (step 103 in FIG. 2), that is, it takes seconds for the "opening operation". I have.

During a predetermined period (! ^ Seconds) after the “key opening operation” of the first lock 1 is completed, the lock rod 4 is out of the first recess 2 a of the second lock 2 so that the second lock 2 Can be moved to the right, that is, the second lock 2 can be unlocked. That is, when the “key opening operation” of the first lock 1 is completed, a period (se seconds) in which the second lock 2 can be unlocked starts (becomes a “time set” state).

In FIG. 3, the person having the key for the second lock 2 unlocks the second lock 2 at n ₂ seconds. Here, (sec + !! sec)> = n ₂ seconds. That is, it takes (n ₂ -n _x ) seconds for the “key opening operation” of the second lock 2. During the period other than the above-mentioned predetermined period (except for n seconds and (t seconds between n + t seconds), even if the person who has the key for the second lock 2 unlocks the second lock 2 In t <== _ni seconds, the first lock 1 has not yet been unlocked, the second lock 2 cannot be unlocked ("locked" state), and t> = n _{At 2} seconds, the predetermined period (t ^ seconds) has elapsed, so the first lock 1 is not unlocked again and the second lock 2 cannot be unlocked (" Overlock ”state).

Therefore, at the time point of n ₂ seconds, both the first lock 1 and the second lock 2 are successfully unlocked (“normal opening operation”), and the door of the building can be opened. .

(Operation of key system according to Embodiment 1 'Effect)

According to the key system according to the present embodiment, the cam drive unit 7 and the hook 9 Unlocking of the second lock 2 is allowed for a period other than the fixed period (1 ^ sec of the “time set” period) in which the unlocking prevention of the second lock 2 is maintained by the engagement. Since it is not possible, the unauthorized unlocker must unlock the first lock 1 and the second lock 2 within a predetermined period, which makes it difficult to unlock without using a duplicate key.

(Configuration of the key system according to the second embodiment)

An embodiment of the present invention will be described with reference to FIGS. The key system according to the present embodiment is provided in a vehicle or the like, and unlocks the second cylinder lock 2 within a predetermined period after unlocking the first cylinder lock 1. It is possible to start the engine. Further, the key system according to the present embodiment prevents unlocking by a special tool or the like other than the duplicate key, and prevents duplication of the duplicate key. '

The key system according to the present embodiment includes a first lock, a second lock, an unlocking prevention unit for preventing unlocking of the second lock, and an unlocking operation in accordance with an unlocking operation of the first lock. Unlocking prevention releasing means for releasing the unlocking prevention of the second lock by the locking prevention means, and unlocking prevention releasing state holding means for maintaining the unlocking prevention state of the second lock for a predetermined period. First detection means for detecting that an object has been inserted into the keyhole of the first lock, second detection means for detecting that the object has reached the deepest part of the keyhole of the first lock, A third detecting means for detecting that the first lock is unlocked, a light emitting means for emitting light in a keyhole of the first lock in response to a detection result by the first detecting means, Light detecting means disposed opposite to the light emitting means with the keyhole of the key interposed therebetween and detecting light in the keyhole of the first lock emitted by the light emitting means; Shielding means for shielding the inside of the keyhole of the first lock in accordance with the detection result by the third detecting means.

Specifically, the key system according to the present embodiment includes a first cylinder lock 1, a second cylinder lock 2, and a control unit 13 as shown in FIGS. Therefore, it is constituted. In the present embodiment, the control unit 13 functions as an unlock prevention unit, an unlock prevention release unit, and an unlock prevention release state holding unit. FIG. 4 is a configuration diagram of the key system according to the present embodiment. FIG. 5 shows an A-A section (transverse section) of the first cylinder lock 1, and FIG. 6 shows a Z-Z section (longitudinal section) of the first cylinder lock 1.

As shown in FIGS. 4 to 6, the first cylinder lock 1 is composed of an outer cylinder 24A and a cylinder frame 25A rotatably fitted into the outer cylinder 24A. I have. As shown in FIGS. 4 to 6, the first cylinder lock 1 has a key detecting mechanism 15, a key detecting switch 16, a light receiving section 17, a light emitting section 18 and a duplication prevention rod. 1 9, copy protection lock mechanism 20, rotation detection switch 21, key arrival detection mechanism 22, key arrival detection switch 23, pin 26, spring 27, cam 28 Is provided.

A key hole 3 OA for inserting the key for the first cylinder lock 1 is formed in the cylinder frame 25 A, and a key door 3 A is provided near the key slot of the key hole 3 OA. . The key door 3A is pushed into the inside of the keyhole 3OA by the key for the first cylinder lock 1 inserted into the keyhole 3OA or a special tool for picking, and comes into contact with the key detection mechanism 15. It is provided as follows. The cylinder frame 25A rotates together with the key for the first cylinder lock 1 inserted into the keyhole 3OA. In the present embodiment, the rotatable range of the cylinder frame 25 A is defined by a keyhole formed in the cylinder frame 25 A 3. A state where the OA is vertical (hereinafter referred to as a vertical state) and a counterclockwise direction from the vertical state. The range is between 45 ° and 45 ° rotated. When the cylinder frame 25A is rotated 45 ° counterclockwise from the vertical state, the first cylinder lock 1 is unlocked.

The key detection mechanism 15 is provided along the horizontal radial direction of a concentric circle formed by the outer cylinder 24A and the cylinder frame 25A, and one of the concentric circles is provided as described above. And the other end is connected to a key detection switch 16. The key detection mechanism 15 is “〇N” when it comes into contact with the key door 3A pushed inside by an object such as a key for the first cylinder lock 1 or a special tool for picking inserted into the keyhole 3 OA. It is what becomes. The key detection mechanism 15 is configured by, for example, a mechanical relay that switches between “ON” and “OFF” in accordance with a contact state with the key door 3A.

The key detection switch 16 is connected to the key detection mechanism 15 and the control unit 13. When detecting that the key detection mechanism 15 is turned “ON”, the LSI of the key detection switch 16 is turned on. By setting “ON”, the control unit 13 is notified of this fact. The key detection switch 16 together with the key detection mechanism 15 constitutes first detection means in the key system according to the present invention. The light receiving section 17 and the light emitting section 18 are provided to be opposed to the center of a concentric circle formed by the outer cylinder 24A and the cylinder frame 25A '. The light receiving section 17 and the light emitting section 18 are provided in a part of the outer cylinder 24A. The light emitting section 18 emits light in the keyhole 3OA in accordance with an instruction from the control section 13, and is constituted by, for example, an LED. When the light emitted by the light emitting unit 18 is detected in the keyhole 30A, the light receiving unit 17 notifies the control unit 13 of the detection, and is configured by, for example, a photodetector. Inside the first cylinder lock 1, a cylindrical shape is formed between the light receiving unit 17 and the light emitting unit 18 so that the light emitted by the light emitting unit 18 reaches the light receiving unit 17 without being blocked. A hollowed-out light guide hole is provided. Therefore, when the key for the first cylinder lock 1 is not inserted into the keyhole 3OA, the light emitted from the light emitting section 18 is received through the above-described cylindrical portion and the keyhole 3OA. Reach Part 17 The light emitting section 18 constitutes light emitting means in the key system according to the present invention, and the light receiving section 17 constitutes light detecting means in the key system according to the present invention. The anti-duplication rods 19 a and 19 b move up and down in accordance with the instruction of the anti-duplication lock mechanism 20 to control the rotation of the cylinder frame 25 A, thereby improperly locking the first cylinder lock 1. This suppresses the movement of the special tool for duplicating the image.

The anti-duplication rods 19a and 19b have the same width as the keyhole 3OA, and extend in the vertical radial direction of a concentric circle formed by the outer cylinder 24A and the cylinder frame 25A and the outer cylinder 24A and the cylinder frame 25. It moves up and down in a cylindrical passage provided through A. Normally, since the ends of the anti-duplication rods 19a and 19b are inside the outer cylinder 24A, the cylinder frame 25A can be rotated without being restrained by the anti-duplication rods 19a and 19b. Can rotate freely.

The anti-duplication rods 19a and 19b are designed to prevent duplication of duplicate keys using special tools with advanced technology, and to prevent prying or breaking through the keyhole 30A. The purpose is to shield the keyhole 3OA and forcibly remove special tools in the keyhole 30A. For this reason, the anti-duplication rods 19a and 19b are made of a metal having high hardness so as to cope with being pryed open by a driver or the like and destroyed by a drill or the like.

The duplication preventing rod 19a is provided on the upper side in the above-described passage, and the duplication preventing rod 19b is provided on the lower side in the above-mentioned passage. The copy protection rod 19a 'is connected to the copy protection lock mechanism 20a, and the copy protection rod 19b is connected to the copy protection lock mechanism 20b. As shown in FIG. 5, the anti-duplication rods 19a and 19b have a non-flat tip (for example, a protruding shape). It is easy to stop the movement of the special tool.

The anti-duplication lock mechanism 20a is connected to the anti-duplication rod 19a and the control unit 13 It is connected to the. The anti-duplication lock mechanism 20 b is connected to the anti-duplication rod 19 b and the control unit 13. The anti-duplication lock mechanisms 20a, 20b control the vertical movement of the anti-duplication locks 19a, 1.9b by cooperating in accordance with the instruction of the control unit 13. is there. That is, the anti-duplication lock mechanism 20a controls the anti-duplication rods 19a and 19b to constitute a shielding means in the key system according to the present invention. The duplication prevention lock mechanisms 20a and 2Ob are connected to the outer cylinder 24A via a solenoid. When the DC voltage is applied by the control unit 13, the anti-duplication lock mechanisms 20 a and 2 O b cause the anti-duplication rods 19 a and 19 b to contract the above-described solenoid by the action of the solenoid. In other words, move the anti-duplication rod 19a downward and move the anti-duplication rod 19b upward.

The cam 28 is provided on the outer periphery of the cylinder frame 25A, and rotates in conjunction with the rotation of the cylinder frame 25A. The cam 28 receives the light from the light-emitting section 18.To prevent the light from leaking to the light section 17, the rotation detection switch is used when the cylinder frame 25A is rotated 45 ° counterclockwise from the vertical state. 2 It is provided to contact 1 1.

The rotation detection switch 21 is connected to the control unit 13, and when it detects that the cylinder frame 25 A has rotated 45 ° counterclockwise from the vertical state by contacting the cam 28, That is, when detecting that the first cylinder lock 1 has been unlocked, the control unit 13 is notified by turning on the LS 3 of the rotation detection switch 21 1. . The rotation detecting switch 21 constitutes third detecting means in the key system according to the present invention.

The key arrival detection mechanism 22 is provided at the center of the concentric circle formed by the outer cylinder 24A and the cylinder frame 25A at the terminal end (deepest part) of the keyhole 3OA. Have been. When the key (object) for the first cylinder lock 1 is inserted to the end of the keyhole 30A, the key arrival detection mechanism 22 comes into contact with the key and turns “ON”. ,

The key arrival detection switch 23 is connected to the key arrival detection mechanism 22 and the control unit 13, and when the key arrival detection mechanism 22 is detected to be "ON", the key arrival detection switch is turned on. By turning on the LS 2 of 23, the control unit 1'3 is notified of that fact. The key arrival detection switch 23, together with the key arrival detection mechanism 22, constitutes second detection means in the key system according to the present invention.

The pins 26 and the springs 27 are housed in a plurality of pin fitting holes provided in the outer cylinder 24A. The pin 26 is composed of two parts, and each part is connected via a connecting part. The pin 26 moves in the radial direction of a concentric circle formed by the outer cylinder 24A and the cylinder frame 25A by the expansion and contraction of the spring 27. Cylinder frame 25 A is allowed to rotate when all pins 26 are connected at the boundary between cylinder frame 25 A and outer cylinder 25 A, otherwise cylinder frame 25 A Rotation is suppressed. As shown in FIG. 4, the main body of the second cylinder lock 2 includes an outer cylinder 24B and a cylinder frame 25B rotatably fitted into the outer cylinder 24B. A keyhole (not shown) for inserting a key for the second cylinder lock 2 is formed inside the cylinder frame 25B. The second cylinder lock 2 ′ is provided with a lock mechanism 31, an insertion prevention port 32, and a rotation prevention rod 33 in addition to the components of the conventional cylinder lock.

The insertion prevention rod 32 is connected to the lock mechanism 31 and is provided along a horizontal radial direction of a concentric circle formed by the outer cylinder 24 B and the cylinder frame 25 B. The insertion prevention rod 32 moves in the above-described horizontal radial direction in accordance with the instruction of the lock mechanism 31 and moves the object (the second shell) into the keyhole 3B. It prevents the insertion of the key for the Linda lock 2). The insertion prevention rod 32 constitutes an insertion prevention part of the key system according to the present invention.

The anti-rotation rod 33 is fitted in a recess provided in the cylinder frame 25B, and prevents the rotation of the cylinder frame 25B according to the instruction of the lock mechanism 31. The anti-rotation rod 33 constitutes the anti-rotation part of the key system according to the present invention.

The insertion prevention rod 32 prevents the duplication of the duplicate key using a special tool with advanced technology, and also shuts off the keyhole 3B to prevent it from being pryed or broken through the keyhole 3B. The purpose is to do so. For this reason, the insertion prevention rod 32 is made of a metal or the like having high hardness so as to cope with being opened by a driver or the like and being broken by a drill or the like.

揷 Since the anti-insertion rod 32 and the anti-rotation rod 33 are linked by the connecting rod 34, both the anti-insertion rod 32 and the anti-rotation rod 33 lock the second cylinder lock 2. In this case, it is difficult for an unauthorized unlocker to forcibly remove the lock rod 32 with a special tool or the like.

The lock mechanism 31 is connected to the insertion prevention rod 32, the rotation prevention rod 33, and the control unit 13, and in accordance with an instruction of the control unit 13, the insertion prevention rod 32 and the rotation prevention rod 33 are connected. It controls movement. When a DC voltage is applied by the control unit 13, the lock mechanism 31 moves the insertion prevention rod 32 and the rotation prevention rod 33 in a direction in which the solenoid is contracted by the action of the solenoid, that is,ロック Release the lock of the second cylinder lock by the lock rod 32 and the lock rod 33.

The control unit 13 includes a key detection switch 16, a light receiving unit 17, a light emitting unit 18, a copy protection lock mechanism 20, a rotation detection switch 21, and a key arrival detection switch. It is connected to switches 23 and transmits and receives signals to and from them.

The control unit 13, together with the lock mechanism 31, constitutes an unlocking prevention means, an unlocking prevention releasing means, and an unlocking prevention releasing state holding means in the key system according to the present invention.

(Operation of the key system according to the second embodiment)

The operation of the key system having the above configuration will be described together with the circuit configuration of the control unit 13 of the key system according to the present embodiment. FIG. 7 is a flowchart showing the operation of the key system having the above configuration.

FIG. 8 is a configuration diagram of a control circuit of the key system according to the present embodiment. Specifically, a battery circuit, an emergency power supply circuit, a detection stability timer circuit, a light emitting circuit, an abnormality detection circuit, It is composed of a normal holding circuit, an improper unlock prevention circuit, an insertion prevention rod circuit, a rotation prevention rod circuit, a normal reset function, an abnormal reset timer circuit, an abnormality holding circuit, and a duplication prevention rod circuit. Have been. The detection stability timer Tl, unauthorized unlock prevention timer Τ2, normal reset timer Τ3, and abnormal reset timer Τ4 are composed of simple electronic timers タイマ.

The power supply for the control circuit of the key system according to the present embodiment normally uses a battery circuit provided in the vehicle.However, when the battery circuit becomes defective or when the battery circuit is disconnected during maintenance, etc. However, in order to prevent the key system according to the present embodiment from becoming inoperable, another power supply such as a dry battery is prepared as an emergency power supply circuit, and the switching circuit S switches between the battery circuit and the emergency power supply circuit. When the key system according to the present embodiment is not operating, this control circuit does not consume power.

As shown in FIG. 7, in step 201, when the key for the first cylinder lock 1 is inserted into the keyhole 3OA of the first cylinder lock 1, the key door 3A is Key detection mechanism 15 is turned “ON”. As a result, LS 1 of the key detection switch 16 turns “ON” (contact is closed).

In step 202, when LS1 of the key detection switch 16 becomes “0 NJ”, a DC current flows from the battery circuit or the emergency power supply circuit in the detection stability timer circuit. As a result, after a predetermined period (for example, 1 Seconds later), the detection stabilization timer T1 is set, and the detection stabilization timer relay (random operation / instantaneous return circuit) T1 turns on (closes the contact). As a result, the above-described DC current flows in the light emitting circuit, and the LED of the light emitting section 18 emits light.

In step 203, when the phototransistor PTR of the light receiving section 17 receives the light of the LED of the light emitting section 18, the above-described DC current flows in the abnormality detecting circuit, and the abnormality detecting relay R2 in the normal holding circuit. Becomes "ON" (opens contacts). As a result, the DC current does not flow through the normal holding circuit. Also, the abnormality detection relay R 2 connected to the abnormality holding circuit and the abnormality reset timer circuit becomes “〇N” (contact closed), and the above-described DC current flows through the abnormality reset timer circuit, and the abnormality reset timer T 4 is set.

In addition, the above-described DC current flows through the abnormality holding circuit, and the abnormality holding relay R3 of the abnormality holding circuit and the abnormality holding relay R3 connected to the duplication prevention rod circuit become "ON" (contact is closed). As a result, the above-described direct current flows through the anti-duplication rod circuit, and the anti-duplication locking mechanisms 20a and 20b cause the anti-duplication rods 19a and 19b to extend the above-described solenoid. Then, it becomes impossible to unlock the first cylinder lock, that is, this operation ends abnormally.

In addition, the abnormality holding relay R 3 of the abnormality holding circuit keeps the abnormality reset timer relay T 4 until the abnormality reset timer T 4 times out. Since it is in the “ON” state (contact closed state), it is not reset and remains in the ΓΟN ”state. That is, the unauthorized unlocking key system cannot be unlocked again until the abnormal reset timer T4 reaches time-out. The abnormal reset timer T4 is set to, for example, several minutes to 5 minutes in order to prevent unauthorized unlocking again. If the phototransistor PTR of the light receiving unit 17 does not receive the light of the LED of the light emitting unit 18, the process proceeds to step 204.

In step 204, when the key for the first cylinder lock 1 is inserted to the end of the keyhole 3OA, the key arrival detection mechanism 22 provided at the end of the keyhole 3OA is turned "ON". As a result, L S 2 of the key arrival detection switch 23 becomes “〇N” (contact is closed).

In step 205, when the cylinder frame 25A rotates counterclockwise by the key for the first cylinder lock 1, the force 28 also rotates counterclockwise in conjunction with the cylinder frame 25A. When the cam 28 rotates 45 °, the cam 28 comes into contact with the rotation detection switch 21 and the L S 3 of the rotation detection switch 21 turns “ON” (closes the contact).

In step 206, since both LS2 and LS3 are turned ON (contacts are closed), the above-described DC current flows in the normal holding circuit. As a result, the normal holding relay R 1 is turned “ON” (contact is closed), and the normal holding circuit is in a self-holding state (Even if 1 32 and 1 ^ 33 become “0 FF”, R 2 remains “OFF”. Unless it turns off, current continues to flow through the normal holding circuit.) In addition, the normal holding relay R1 connected to the insertion prevention rod circuit and rotation prevention rod circuit becomes “〇N” (contact closed). In step 207, since the above-mentioned normal holding relay R1 is turned “ON”, the above-described DC current flows through the unauthorized unlocking timer circuit, and the unauthorized unlocking timer T2 is set. As a result, unauthorized unlocking ties The relay T 2 is turned “ON” (contact closed). For example, the unauthorized unlocking prevention timer T2 is set to about 5 seconds. In addition, when the above-mentioned normal holding relay R1 becomes “〇N” (contact closed), the above-described DC current flows through the normal reset timer circuit, and the normal reset timer T3 is set. You. Even after the key system has been unlocked, the normally-holding relay R1 remains in the “〇N” state, so the normally-reset timer T3 is a timer provided to reset this state. is there.

In step 208, the above-described direct current flows in the insertion prevention rod circuit and the rotation prevention rod circuit. As a result, the lock mechanism 31 moves the insertion prevention rod 32 and the rotation prevention rod 33 in the direction of contracting the above-mentioned solenoid by the action of the solenoid, and the H 2 by the insertion prevention rod 32 and the rotation prevention rod 33 becomes H 2. Release the lock on cylinder lock 2. In step 209, when the unauthorized unlocking timer T2 has timed out, the unauthorized unlocking relay T2 connected to the insertion prevention rod circuit and the rotation prevention rod circuit is turned OFF (contact The lock mechanism 31 moves the insertion prevention rod 32 and the rotation prevention rod 33 in the direction in which the solenoid is extended, and locks the second cylinder lock. Therefore, after the timeout of the unauthorized unlocking prevention timer T2, the unlocking of the second cylinder lock 2 becomes impossible, and this operation ends abnormally. If the unlocking of the second cylinder lock 2 is completed before the time for the unauthorized unlocking prevention timer T2 expires, this operation ends normally. FIG. 9 is a time chart showing the operation of the key system having the above configuration. First, the operation of the first cylinder lock 1 will be described together with the operation of the control circuit.

In seconds, the key for the first cylinder lock 1 is inserted into the keyhole 3 OA of the first cylinder lock 1 (the key enters and exits), and the key LS 1 of the detection switch 16 becomes “〇N” (Step 201 in FIG. 7). One second later, at n ₂ seconds, the detection stability timer T 1 is set, the detection stability timer relay T 1 becomes “〇N”, and the LED of the light emitting unit 17 emits light (step in FIG. 7). 202). period from n ₂ seconds n ₃ seconds, i.e., the period T 1 is "ON" state, the light emission continues.

At the second, the key for the first cylinder lock 1 is inserted to the end of the keyhole 3OA, so that the LS 2 of the key arrival detection switch 23 is set.

It becomes “〇N” (step 204 in FIG. 7). Further, at n ₂ seconds, the cam 28 rotates 45 °, so that the LS 3 of the rotation detection switch 21 becomes “1N” (step 205 in FIG. 7).

As a result, at n ₂ seconds, the lock of the second cylinder lock 2 by the insertion prevention rod 32 and the rotation prevention rod 33 is released (Step 208 in FIG. 7). At n ₂ seconds, the incorrect answer prevention timer T 2 is turned “ON”. The insertion prevention rod 32 and the rotation prevention rod 33 of the second cylinder lock 2 continue to release the lock while the unauthorized release prevention timer T2 is in the "ON" state.

LS 2 and LS 3 are in the “〇N” state during the period from n ₂ seconds to n ₃ seconds, that is, during the period when the first cylinder lock 1 is in the “open operation” state, and FF ”state, but the“ ON ”state of the normal hold relay R1 is not changed until the normal reset timer T3 times out (ie, until n ₇ seconds), and the phototransistor PTR detects light. Unless otherwise (that is, as long as the abnormality detection relay R2 does not turn OFF). from n ₂ seconds for a period of n ₃ seconds, the abnormality detection relay one when R 2 becomes "〇_FF" abnormal holding relay R 3 is "〇_N" and first duplication rod of the cylinder lock 1 1 9a, and 1 9b lock. This lock state continues until the abnormal reset timer T4 times out. At ₄ seconds, the key for the second cylinder lock 2 is inserted into the keyhole of the second cylinder lock 1 ("key in / out" state), and at ₅ seconds, the second cylinder unlocks. The operation is started (the “key opening operation” state), and the unlocking operation of the second cylinder ends at n ₆ seconds.

Thus, unlocking of the key system according to the present embodiment is performed between the 11 ₆ seconds 11 _second (first cylinder lock 1 and a second "normal opening operation" of the cylinder lock 2). ,

In addition, the key system according to the present embodiment can be provided on a door of an outdoor vending machine, a door of a general building, and the like, in addition to a vehicle. The key system according to the present embodiment can be applied to keys other than the cylinder lock.

(Operation and effect of the key system according to the second embodiment)

According to the key system according to the present embodiment, the lock mechanism 31 is controlled by the control unit 13 according to the detection result of the key detection switch 16, the key arrival detection switch 23, and the rotation detection switch 21. In order to control the predetermined period during which the prevention of unlocking of the second cylinder lock 2 is released, the unauthorized unlocking person must unlock the two locks within the predetermined period, and unlock the lock without using the duplicate key. It becomes difficult to lock. Further, the lock mechanism 31 releases the unlocking prevention of the second cylinder lock 2 by instructing the control unit 13 according to the detection result of the key arrival detection switch 23, so that the unauthorized unlocker With the key arrival detection switch 23 provided at the deepest part of the keyhole 3 0 A of the cylinder lock 1 1, keep the `` ON '' state, that is, at the deepest part of the keyhole 3 OA of the first cylinder lock 1. The first cylinder lock 1 must be unlocked with the special tool fixed, making unauthorized unlocking difficult.

Further, according to the key system according to the present embodiment, the lock mechanism 31 instructs the control unit 13 according to the detection result of the light receiving unit 17 to prevent the unlocking of the second cylinder failure 2. To unlock, specially cover the entire keyhole 3 OA Tools must be used, making unauthorized unlocking difficult.

Further, according to the key system according to the present embodiment, the anti-duplication lock mechanisms 20a and 20b respond to the detection results by the key detection switch 16, the key arrival detection switch 23, and the rotation detection switch 21. In order to shield the inside of the keyhole 3 OA of the first cylinder lock 1, the duplication of the duplicate key using a special tool is prevented, and at the same time, the keyhole 3 OA is prevented from being pryed open or broken. Becomes possible.

Further, according to the key system according to the present embodiment, since the insertion prevention rod 32 and the rotation prevention rod 33 are configured to interlock with each other, the insertion prevention rod 32 becomes the second cylinder lock 2. Incorrect answer if entry of object into keyhole 3B is refused and rotation prevention port 3 3 refuse to rotate cylinder frame 25B of second cylinder lock 2. This makes it difficult for the locker to forcibly open the insertion prevention rod 32 using a special tool or the like. Industrial applicability

As described above, according to the chain system of the present invention, a low-cost key system for preventing unauthorized unlocking can be provided.

Claims

The scope of the claims

1. The first lock,

A second lock,

Unlocking prevention means for preventing unlocking of the second lock;

Unlock prevention release means for releasing the unlock prevention of the second lock by the unlock prevention means in response to the unlocking operation of the first lock;

A key system comprising: an unlocking / unlocking release state holding unit that holds a state in which unlocking of the second lock is released for a predetermined period.

2. The unlocking prevention means comprises:

A recess formed in the second lock;

A lock rod for fixing the movement of the second lock from the locked position to the unlocked position by being fitted into the concave portion, and the unlocking preventing means comprises: The key system according to claim 1, wherein the second lock is prevented from being unlocked by being fitted.

3. The unlocking prevention releasing means is as follows:

A cam roller that rotates together with a rotating shaft that rotates by the unlocking operation of the first lock;

A cam drive unit driven in accordance with the rotation of the cam roller,

The unlocking prevention releasing means releases unlocking of the second lock by removing the lock rod connected to the cam driving unit from the recess in response to driving of the cam driving unit. 3. The key system according to claim 2, wherein:

4. The unlocking prevention release state holding means includes: A mainspring mechanism wound up in response to movement of the first lock from the locked position to the unlocked position;

An engagement means for engaging with the cam drive unit,

In the unlocking prevention release state holding means, the mainspring mechanism is wound up in response to a movement of the first lock from a locked position to an unlocked position by an unlocking operation of the first lock, When the engagement means engages with the cam driving portion, the unlocking prevention of the second lock is maintained, and

After a lapse of a predetermined period, the engagement between the engagement means and the cam drive unit is released in accordance with the operation of the mainspring mechanism, and the lock bar is fitted into the recess, thereby unlocking the second lock. 4. The key system according to claim 3, wherein the key system is prevented.

5. The first lock and the second lock are cylinder locks,

First detection means for detecting that an object has been inserted into the keyhole of the first lock; and- second detection means for detecting that the object has reached the deepest part of the keyhole of the first lock. When,

And a third detecting means for detecting that the first lock has been unlocked. The unlocking / unlocking releasing means, in accordance with a detection result by the first to third detecting means, The key system according to claim 1, wherein the unlocking prevention of the second lock is released.

6. A light emitting unit that emits light in the keyhole of the first lock according to a detection result by the first detection unit,

Light detecting means arranged opposite to the light emitting means with the keyhole of the first key interposed therebetween, and detecting light in the keyhole of the first lock emitted by the light emitting means;

The unlocking prevention releasing means, according to a detection result by the light detecting means, The key system according to claim 5, wherein unlocking prevention of the second lock is released.

7. The key system according to claim 5, further comprising shielding means for shielding the inside of the keyhole of the first lock in accordance with a detection result by the first to third detection means. .

8. The unlocking preventing means includes an insertion preventing portion for preventing an object from being inserted into a keyhole of the second lock, and a rotation preventing portion for preventing rotation of a cylinder frame of the second lock. ,

The invention according to claim 5, wherein the unlocking prevention releasing means releases the unlocking prevention of the second lock by controlling the insertion preventing part and the rotation preventing part. Key of mention: