JP3583571B2 - Door lock with memory mechanism - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a door lock with a memory mechanism that stores the number of times a door lock is locked and unlocked and can read the stored number of times from the indoor side as needed.
[0002]
[Prior art]
A door lock having a locking mechanism is used for a front door of a home, an entrance door of a hotel room, and the like.
FIG. 4 is a perspective view schematically illustrating an example of a door lock provided with a locking mechanism. A lock case 1 is inserted into a concave portion provided on an end surface of a door D, and a front provided at an end of the lock case 1. At the front 2 where the upper and lower ends of the 2 are fastened to the end of the door D by screws 3, there are provided holes through which the dead bolts 4 protrude and retract and latch holes 5 which protrude and retract.
[0003]
When the door D is closed, the latch bolt 5 urged in the projecting direction projects from the front 2 and engages with a strike latch bolt engaging hole (not shown) provided in a pillar on the frame side, and the door D is closed. D is held in the closed state, but when the lever handles 6 provided on both sides of the door are rotated, the latch bolt 5 is immersed and the door can be opened.
There is also a type of door in which a door knob is provided instead of the lever handle 6.
[0004]
In the door lock provided with the locking mechanism, the end of the rotor 8 of the cylinder lock 7 attached to the outdoor surface and the end of the thumb turn 9 rotatably mounted on the indoor surface of the door are inside the lock case 1. At both ends of a drive shaft (not shown) provided at the front end.
When the door is closed, the dead bolt 4 protrudes and retracts from the front 2 due to the turning operation of the key K inserted into the key hole of the cylinder lock 7 from the outside or the turning operation of the thumb turn 9 from the inside of the room. Then, the strike locks into a latch bolt engagement hole (not shown), and the door lock is locked.
A person who goes out after locking the door lock removes the key K from the keyhole and carries it.
[0005]
[Problems to be solved by the invention]
A locked door lock can be unlocked if there is a duplicate key having the same key code as the regular key K. Therefore, if a third party other than the person owns the duplicate key, the door can be opened without permission. Can intrude.
In addition, when a third party with a duplicate key enters the room while absent and locks and exits, there is no record of the intrusion, so as long as there is no trace of intrusion as if the room was damaged, There was no way to know that there was.
Therefore, in the conventional door lock, there is a problem that an intruder who is away is not noticed or anxiety such as intrusion cannot be wiped out.
An object of the present invention is to solve such a problem.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a door lock with a memory mechanism of the present invention includes a key operation of a cylinder lock provided outside the door and a thumb turn provided on the indoor side of the door and interlocked with a rotor of the cylinder lock. In a door lock in which a deadbolt protrudes and retracts from the door end face by the turning operation of the door, a housing in which the above-mentioned thumb turn is provided on the front wall and the counter display window and the reset knob operation window are opened on the front wall. And a rack that meshes with a pin-on provided on the shaft portion of the thumb turn, moves forward in the housing by rotating the rotor of the cylinder lock or the locking angle of the thumb turn, and retracts by rotating the unlock angle. and actuating rod, is pivoted rotatably in the housing, the pawl is pushed by the forward movement of the actuating rod is provided with a plurality circumferentially arranged, in response to nail A counter plate symbols displayed on the surface is projected from the counter display windows, movable in the housing, and a reset knob having an operating portion exposed to the reset knob operation window, a side surface of the counterplate provided, locking by a homing cam having a cam surface which rotates to the origin angle of the counter plate when it is pushed by the movement of the reset knob, the memory mechanism unlocking operation is configured, the cylinder lock The symbol of the counter plate in the counter display window fluctuates by the first rotation operation by the person himself / herself for the locking angle of the rotor or the thumb turn, and the counter plate is rotated by the second rotation operation by a third person of the locking angle Is further changed by one, so that the person can detect the presence / absence of locking / unlocking by a third party .
[0007]
The symbol corresponding to the nail is a number indicating the number of times of locking and unlocking, and a zero number can be displayed in the counter display window when the counter plate rotates to the origin angle. .
It is preferable to provide a reverse rotation preventing leaf spring in which the tip is engaged with the claw of the counter plate and the engagement is released by moving the reset knob in the housing.
The housing may be provided with an opening / closing lid that covers the counter display window and the knob operation window.
Further, a magnet is embedded in a regular key used for a door lock, and a magnetic sensor for sensing the magnetism of the magnet when the key is inserted into a keyhole of the cylinder lock in the housing; A counter may be provided to indicate the number of times the sensor has sensed.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a main part of a door lock as viewed from the indoor side, FIG. 2 is a front view of the door lock as viewed from the indoor side, and FIG. It is a perspective view of a door lock.
As shown in FIG. 3, a front case 2 of a lock case 1 is fixed to an end face of a door D by screws 3, and a dead bolt 4 and a latch bolt 5 are provided on the front 2 so as to be able to protrude and retract as in the conventional example. It is.
[0009]
The housing 10 fixed to the indoor side surface of the door D includes a main body 11 having a housing chamber 12 (see FIG. 1) opening to the front, a front wall 13 attached to the front of the main body 11 and covering the housing chamber 12. Having.
On the left side of the front wall 13, there is formed a step portion 14 which is one step lower than the surface, and an opening / closing lid 16 pivotally attached to a hinge 15 provided at the left end of the front wall 13 opens and closes the step portion 14 (FIG. 3).
[0010]
A thumb lock 17 is rotatably inserted into the front wall 13, and a cylinder lock 7 similar to that shown in FIG. 4 is attached to the outside of the room. The dead bolt 4 appears and disappears by the rotating operation of the inserted key K.
A counter display window 18 and a knob operation window 19 are opened in the step portion 14 on the left side of the front wall 13 (see FIGS. 2 and 3).
[0011]
A pinion 20 fixed to the outer peripheral surface of the thumb turn 17 and an operation rod 22 having a rack 21 meshing with the pinion 20 are provided in the accommodation chamber 12 of the housing 10.
One end (right end in FIG. 1) of the operating rod 22 and a shaft 23 fixed to the storage chamber 12 have both ends of a tension spring 24 stretched, and the other end of the operation rod 22 is a guide fixed to the storage chamber 12. Press against the pin 25.
Therefore, when the thumb turn 17 rotates in the locking or unlocking direction, the operating rod 22 having the rack 21 meshing with the pinion 20 moves left and right by a predetermined stroke while slidingly contacting the guide pin 25.
[0012]
A counter plate 26 having a support shaft 27 rotatably supported on the inner wall surface of the storage chamber 12 is provided with claws 28 arranged at positions that divide the circumference of the outer peripheral surface into ten equal parts.
One end of a counter-reverse-prevention leaf spring 29 is fixed to the wall surface of the storage chamber 12 with a screw 30, and the contour of the claw 28 is a locking surface 28 a that is locked to the other end of the counter-reversal prevention leaf spring 29. It is formed by an inclined surface 28b which is bent from the end of the locking surface 28a and is continuous.
[0013]
Each time the operating rod 22 moves left and right, the claw 28 is pushed and the counter plate 26 rotates 1/10 clockwise, and its rotation is prevented by the counter reverse rotation preventing leaf spring 29.
On one side of the counter plate 26, a symbol 31 expressed by a number from "0" to "9" is provided. Each time the counter plate 26 rotates 1/10, the next number symbol 31 is displayed on the counter display window. 18 to see through.
[0014]
An upper guide wall 32 and a lower guide wall 33 are vertically arranged on the inner wall surface of the accommodation room 12, and a reset knob 34 is inserted into the upper guide wall 32 and the lower guide wall 33.
A flange 35 protruding from both sides is provided at an upper portion of the reset knob 34, and a push-up spring 36 is inserted between the flange 35 and the lower guide wall 33.
Accordingly, the reset knob 34 is urged upward, and is located at a raised position where the flange 35 contacts the lower surface of the upper guide wall 32.
[0015]
The reset knob 34 is provided with an operation portion 37 that is exposed to the knob operation window 19 of the step portion 14. The lower end of the reset knob 34 is located at a position where it comes into contact with the reverse rotation preventing leaf spring 29, and A pushing portion 38 for pushing the counter-reversal preventing leaf spring 29 is formed, and a slope 39 is formed on the right side surface of the reset knob 34 so as to be inclined downward and away from the support shaft 27 of the counter plate 26. You.
[0016]
On one side surface of the counter plate 26, an origin return cam 40 whose outer peripheral surface is a cam surface is integrally provided.
The origin return cam 40 has such a size that only the lowest point of the cam surface allows the reset knob 34 to pass through the slope 36, and is formed on a curved surface where the cam lift gradually rises from this lowest point to the highest point rotated by 180 degrees. Have been.
Therefore, when the reset knob 34 is lowered, the origin return cam 40 pressed by the slope 36 rotates to an angle (origin return angle) where the lowest point of the cam surface is directed to the side where the slope 36 passes.
At this origin return angle, the symbol 31 of “0” is seen through the counter display window 18.
[0017]
Next, the operation of the door lock with the memory mechanism configured as described above will be described in the order of the normal state, the operation when going out, and the memory checking operation after returning home.
In a normal state, the opening / closing lid 16 is closed, and covers the counter display window 18 and the knob operation window 19.
When a single resident goes out, first, the door lock is unlocked, the opening / closing lid 16 is opened, the operation portion 37 exposed from the knob operation window 19 is picked, and the reset knob 34 is lowered.
[0018]
The pushing portion 38 of the reset knob 34 pushes the plate spring 29 for preventing reverse rotation to release the engagement of the claw 28 with the locking surface 28a.
Thereafter, the slope 39 of the reset knob 34 comes into contact with the origin return cam 40, and the origin return cam 40 pressed by the lowering of the reset knob 34 rotates, and the symbol "0" 31 is seen through the counter display window 18. .
Next, the door 16 is closed, the door is opened, and the door is locked with the key K inserted into the keyhole from the outside.
As a result of this locking operation, the door D is held so as not to be opened, and the operating rod 22 moves to the solid line position in FIG. 1 to push the claw 28, and the counter plate 26 rotates 1/10.
After locking, remove the key K, carry it and go out.
[0019]
After returning home, when the key K is unlocked, the door D can be opened and the operating rod 22 moves to the position shown by the dashed line in FIG.
When the person who enters the room opens the opening / closing lid 16, the symbol 31 of "1" is seen through the counter display window 18, so that the third person knows that the locking and unlocking operation is performed only once by the person. You can be assured that there was no intrusion.
The opening / closing lid 16 prevents an intruder from pushing the reset knob 34 unnecessarily.
[0020]
If a third party unlocks and unlocks himself / herself with a duplicate key while away from home and locks when going out of the room, the counter plate 26 is further rotated 1/10 of a turn, so that the person who came home can see the counter display window. When looking at 18, the symbol 31 of "2" is seen through, and even if the room is not broken, it can be confirmed that somebody has invaded without permission.
[0021]
A regular key having a magnet embedded therein can be used together with such a door lock with a memory mechanism.
In this case, the door lock is provided with a magnetic sensor that detects the magnetism of a magnet embedded in the key when the key is inserted into the keyhole of the cylinder lock, and a counter that displays the number of times the magnetic sensor detects the magnet. Keep it.
[0022]
In this case, the number of the counter display window 18 is increased by one by the locking operation, and each time a key is inserted into the keyhole, the number of times of sensing by the magnetic sensor is added to the counter and displayed.
That is, if the number of times of sensing by the magnetic sensor is doubled with respect to the increase of the number in the counter display window 18, it can be confirmed that only the regular key in which the magnet is embedded is used.
[0023]
On the other hand, when a third party uses a duplicate key in which a magnet is not embedded, the number of times of sensing by the magnetic sensor is not increased with respect to the increase in the number displayed in the counter display window 18. Can know the illegal intrusion of the person.
When the magnetic sensor senses twice, the counter may be incremented by one, or the symbol 31 of the counter plate 26 may be set to an even number in advance to correspond to the number.
[0024]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
(1) Even if a third party intrudes illegally using a duplicate key and locks and leaves so as not to leave a trace of the intrusion, the door lock with memory mechanism of the present invention determines whether or not there is intrusion during absence. It can be known very easily.
Therefore, there is no problem that an intruder who is away is not noticed or anxiety of intrusion is caused even though there is no intrusion.
(2) Even if the door lock with the memory mechanism of the present invention is provided with a sensor for detecting insertion of a magnet-embedded key, it is possible to extremely easily know whether or not there is intrusion during absence.
[Brief description of the drawings]
FIG. 1 is a fragmentary front view of a main part of a door lock with a memory mechanism viewed from the indoor side.
FIG. 2 is a front view of the door lock with a memory mechanism as viewed from the indoor side.
FIG. 3 is a perspective view of a door lock with a memory mechanism.
FIG. 4 is a perspective view illustrating a configuration of a conventional general door lock.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Housing 12 Storage room 13 Front wall 16 Opening / closing lid 17 Thumb turn 18 Counter display window 19 Knob operation window 20 Pinion 21 Rack 22 Operating rod 24 Tension spring 26 Counter plate 27 Support shaft 28 Claw 29 Counter reverse rotation preventing leaf spring 31 Symbol 34 Reset knob 37 Operating part 38 Pushing part 39 Slope 40 Home return cam

Claims (5)

A key operation of a cylinder lock provided on the outside of the door of the door and a rotation operation of a thumb turn provided on the inside of the door and interlocking with the rotor of the cylinder lock cause the dead bolt to protrude from the door end face. ,
Is secured to the surface of the door interior side, the thumb is provided in the front wall, a housing counter display window and the reset knob working window is opened, the rack meshing with pin-on provided on the shaft portion of the thumb turn Yes and, advancing the housing in the rotation of the locking angle of the rotor or thumb of the cylinder lock, the operating rod to retract in the rotation of the unlocking angle, is pivoted rotatably in the housing, the working A plurality of claws pushed by the forward movement of the rod are provided in a plurality arranged in the circumferential direction, and a symbol displayed on the side surface corresponding to the claws is provided through the counter display window through the counter plate and the housing. movably provided, a reset knob having an operating portion exposed to the reset knob working window provided on the side surface of the counter plate, by the movement of the reset knob Locking by a homing cam having a cam surface which rotates to the origin angle of the counter plate when it is moving, the memory mechanism unlocking operation is configured,
In the first rotation operation by the person himself / herself of the locking angle of the rotor or the thumb turn of the cylinder lock, the symbol of the counter plate in the counter display window changes by one, and the second rotation operation of the locking angle by a third party by the third person. A door lock with a memory mechanism , wherein the symbol of the counter plate further changes by one, so that the person can detect the presence or absence of locking and unlocking by a third party . The symbol corresponding to the claw is a number indicating the number of times of locking and unlocking, and a zero number is displayed in the counter display window when the counter plate is rotated to the origin angle. Item 2. A door lock with a memory mechanism according to Item 1. 3. The door with a memory mechanism according to claim 1, wherein a reverse rotation preventing leaf spring is provided in the housing, the tip of which engages with a claw of the counter plate, and the engagement is released by movement of the reset knob. Tablets. 4. The door lock with a memory mechanism according to claim 1, wherein the housing is provided with an opening / closing lid for covering the counter display window and the reset knob operation window. A magnet is embedded in a regular key used for a door lock, and a magnetic sensor for sensing the magnetism of the magnet when the key is inserted into a keyhole of the cylinder lock in the housing; 5. The door lock with a memory mechanism according to claim 1, further comprising a counter for displaying the number of times of sensing.

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