JP2507012Y2 - Electric lock - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a mechanism of an electric lock which is repeatedly locked and unlocked.

[Conventional technology]

The operation mode of the electric lock, that is, the operation mode is roughly classified into a locking / unlocking repeated type and an automatic locking type.

Repeated locking and unlocking type electric locks are disclosed, for example, in JP-A-61-246479.
As described in the publication, the electromagnetic actuator operates in the locking or unlocking direction in response to the locking or unlocking signal to lock or unlock the electric lock, but until the next unlocking or locking signal is generated. Operates so as to maintain the locked or unlocked state. This repetitive locking and unlocking type electric lock is attached to a common doorway of a condominium or a hotel entrance, for example, which is convenient to be unlocked during the daytime when people often come and go.

On the other hand, an automatic locking type electric lock is disclosed in, for example, Japanese Patent Laid-Open No. 60-12937.
As described in Japanese Patent Publication No. 8, the electromagnetic actuator is actuated and the electric lock is unlocked when an unlocking signal is generated, as in the case of the repeated locking / unlocking type, but the door is closed after entering or leaving the room. Then, the lock is automatically performed. Since this automatic lock type electric lock has high safety, it is suitable for a door of a guest room of a hotel or a private room of a condominium, for example.

[Problems to be solved by the device]

However, in a room or the like in which an electric lock of locking / unlocking type is arranged, in order to close this room, the last person leaving the room must lock the electric lock by using a duplicate key or the like. In other words, the person who does not have the key must be the last person to leave the room, and the person who has the key must stay until all other people leave the room. There is a problem of not becoming.

On the other hand, in the case of the automatic lock type electric lock, it is locked every time the user leaves the room (close the door), but a key is required to enter the room (open the door). Therefore, the person who enters the room must always have the duplicate key, which becomes complicated when the person enters and leaves frequently.

Therefore, in order to solve the above problems, the present invention provides an electric lock of repetitive locking / unlocking type with an electric lock having a mechanism capable of automatically locking when a door is closed without using a duplicate key or the like. It is intended to be provided.

[Means for solving the problem]

Next, means for achieving the above object will be described with reference to FIGS. 1 to 3 corresponding to the embodiment.

The electric lock of the present invention has a control body 29 that moves between a locking control position and an unlocking control position at least in response to an operation from the outside of the room and a manual operation from the inside of the room, and a lock box 2.
The latch head 7 protrudes longer than the front end face of the lock box 2 and stops when the door is closed, and the latch head 7 protrudes shorter than the front end face of the lock box 2 and stops when the door is opened. Which moves between a latch bolt 3 for locking, a locking position for engaging a locking step portion 8 formed on the base of the latch head 7, and an unlocking position separated from the locking position.
26, so that when the control body 29 moves to the locking control position, the locking body 26 moves to the locking position, and when the control body 29 moves to the unlocking control position, the locking body 26 moves to the unlocking position. A buffer spring 30 for interlocking the control body 29 and the locking body 26 is provided. When the latch head 7 of the latch bolt 3 is in the stop position when the door is opened and the control body 29 is in the locking control position, the locking body 26 is elastically pressed onto the latch head 7 via the buffer spring 30. Then, the locking body 26 becomes the latch bolt 3
When the latch head 7 of the latch bolt 3 moves to the stop position when the door is closed, the locking body 26 is elastically engaged with the locking step portion 8 via the buffer spring 30. The feature is that it is stopped.

[Action]

When the door is opened, the control body 29 in the unlock control position is moved to the lock control position. Then, the movement of the control body 29 is transmitted to the locking body 26 via the buffer spring 30, but the locking body 26 is
The latch bolt 3 is not locked by being elastically pressed onto the base of the latch head 7 in the semi-projected state. If you close the door as it is,
The latch head 7 is projected, and the locking body 26 is elastically locked to the locking step portion 8 of the base of the latch head 7, and the latch bolt 3
Automatically locks the door.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First, as shown in FIG. 1, a lock box 2 constituting a casing of an electric lock 1 is formed in a substantially rectangular shape. A latch bolt 3 is arranged in the lock box 2 at substantially the center thereof so as to be movable in the front-rear direction (the left-right direction in FIG. 1) perpendicular to the front plate 4 of the lock box 2.

At the tip of the latch bolt 3, there is provided a substantially wedge-shaped latch head 7 formed of an impact surface parallel to the paper surface of FIG. 1 and an inclined surface diagonally intersecting with the impact surface. The main body of the latch bolt 3 in the box 2 projects outward from the front plate 4. Also, the latch head 7
Is formed to have a larger diameter than the main body of the latch bolt 3, and a locking step portion 8 is formed between them, and a locking piece 16 that engages with a catch lever 14 described later is provided on the lower surface of the latch head 7. It is projected.

A latch spring 9 formed of a compression coil spring is attached to the latch bolt 3, one end of which is fixed to the tip of the latch bolt 3 and the other end of which is formed so as to protrude from the inner surface of the side plate 2a of the lock box 2. The latch head 7 is fixed to the substantially U-shaped support piece 2b, and the latch head 7 is biased in a direction projecting from the front plate 4 by the elastic force of the latch spring 9.

The latch bolt 3 is locked to the bolt operating member 10 in a normal state (state in which the door is closed), and
As shown in the figure, only the latch head 7 keeps the position protruding from the front plate 4.

Next, the bolt operating member 10 is located below the base end side of the latch bolt 3 and has a substantially cylindrical base end portion 10a and an elongated body formed by integrally extending from a part of the base end portion 10a. It is composed of a plate-shaped actuating part 10b, and a base end part 10a is provided on the side plate 2a of the lock box 2.
Is rotatably supported. The operating portion 10b of the bolt operating member 10 is designed so that the tip thereof comes into contact with the inner end surface of the base end of the latch bolt 3 from the front (left side in FIG. 1). Further, a substantially rectangular through hole 10c is formed in the base end portion 10a of the bolt operating member 10, and the lock box 2 and the door 11 are formed.
Drive shaft (not shown) with a rectangular cross section through the free edge of the
Is installed. Then, external operating members such as knobs and handles are attached to both ends of the drive shaft.

Further, a return spring 12 composed of a torsion spring is wound around the base end portion 10a of the bolt operating member 10 to urge the bolt operating member 10 in the counterclockwise direction in FIG. A stopper 13 that regulates the rotational force of the return spring 12 stops at the angle shown in FIG.

A catch lever 14 is arranged below the tip of the latch bolt 3. A base end 14a of the catch lever 14 is rotatably supported by a pivot 15 projecting in the lock box 2, a front end 14b extends toward the front plate 4, and a locking piece 16 of the latch head 7 described above. Facing. This tip 14b
A stop pin 17 is planted in this so that the locking piece 16 can be engaged. A torsion spring 18 is attached to the base end of the catch lever 14,
14 is always biased counterclockwise around the pivot 15. Further, a protrusion 14c protruding in a substantially orthogonal direction is formed in the middle of the catch lever 14. The projecting piece 14c extends to the trigger portion 19.

The trigger portion 19 is located below the catch lever 14,
A wedge-shaped trigger head 20 having substantially the same shape as the above-mentioned latch head 7 is arranged so as to project from the front plate 4. At the base end of this trigger head 20, a trigger plate 21 and a support plate 22 are extended, and a U-shaped fixed bracket.
This trigger head is attached to the guide shaft 24 provided via 23.
20 can slide in the front-back direction (left-right direction in FIG. 1). A compression coil spring 25 is provided between the support plate 22 and the fixed bracket 23, and the trigger head 20 is biased in the forward direction (leftward in the drawing) with respect to the fixed bracket 23. In addition, the trigger plate 21 is the catch lever 14 described above.
The projecting piece 14c can be abutted and engaged from the front.

With the above-described structure, when the bolt operating member 10 is rotated clockwise as shown in FIG. 5 by turning the knob, the handle or the like, the latch bolt 3 is moved by the actuating portion 10b in the inner direction of the lock box 2 (in the figure). It moves to the right), the tip of the latch head 7 becomes substantially flush with the front plate 4, and the door can be opened.
When the door is opened, the trigger head 20 that has been pushed into the lock box 2 by the strike plate 6 of the door frame 5 moves forward due to the bias of the compression coil spring 25, so that the trigger plate 21 causes the protrusion 14 to move.
The catch lever 14 is rotated clockwise via c. Then, the stop pin 1 at the tip 14b of the catch lever 14
7 is rotated to a position where it interferes with the movement locus of the locking piece 16 of the latch head 7. That is, when the knob or the like is released, the bolt operating member 10 returns to its original position by the return spring 12 as shown in FIG. 6, but the latch bolt 3 locks the latch head 7 to the stop pin 17. The piece 16 is engaged, and the latch head 7 is stopped in a protruding state where only the inclined surface is left. That is,
At the time of closing the door, the inclined surface of the latch head 7 comes into contact with the strike plate 6 of the door frame 5 without turning the knob or the like, so that the latch bolt 3 can be pushed in.

When the door is closed from the open state shown in FIG. 6, the trigger head 20 and the latch head 7 are simultaneously pushed into the lock box 2 by the slyk plate 6 of the door frame 5, and the trigger plate 21 is retracted. The catch lever 14 is rotated counterclockwise by the urging force of the torsion spring 18 and the stop pin 17
The engagement between the locking piece 16 and the locking piece 16 is released. Then, only the latch head 7 is fitted into the bolt locking hole 6a of the strike plate 6 of the door frame 5, and the latch bolt 3 advances to be in the door closed state as shown in FIG.

On the other hand, near the upper part of the latch bolt 3, a locking body 26 is arranged as shown in FIG. As shown in FIG. 2, the locking body 26 extends vertically from the horizontal base 26.
d is integrally formed in an inverted T shape, and part of the side edges at both ends of the base is bent into an L shape to form bent portions 26a and 26b, thereby increasing rigidity. Is becoming
A cam portion 45 is formed at the tip of the extending piece 26d. A through hole 26c is formed substantially in the center of the base of the locking body 26, and is rotatable about a support shaft 27 fixed to the side plate 2a of the lock box 2 close to the middle of the latch bolt 3. Installed on. That is, the base body of the locking body 26 is the latch bolt 3
It is provided along with.

In addition, the end of the tip side bent portion 26a of the locking body 26 is a locking end 28, and the locking body 26 is centered around the support shaft 27 in the counterclockwise direction as shown in FIG. When the locking end 28 interferes with the movement locus of the locking step portion 8 of the latch bolt 3, the locking end 28 and the locking end 28 engage with each other. It does not interfere with the stop step portion 8 and can be moved between a position separated from the locking step portion 8, that is, an unlocking position shown in FIG. The detection of the locked position and the unlocked position of the locking body 26 is detected by the detector 46 that is in contact with the cam portion 45 at the tip of the extending piece 26d.

Next, a control body 29 is provided on the upper surface of the locking body 26 as shown in FIGS. 2 and 3. This control body 29
Is formed in an L-shape composed of a vertical portion 29a and a horizontal portion 29b, and a mounting hole 29c is provided in the bent central portion. An L-shaped coupling fitting 32, which is coupled to an electromagnetic drive device 31 described later, is swingably attached to a midway portion of the vertical portion 29a of the control body 29. Further, a connecting pin 44 connected to a switching lever 43 described later is planted at the tip of the horizontal portion 29b. The mounting hole 29c of the control body 29 is rotatably supported by the support shaft 27 described above. That is, as shown in FIG. 3, the mounting hole 29c of the control body 29 is concentric with the through hole 26c of the locking body 26, and the locking body 26 and the control body 29 are overlapped with each other to support the spindle. It is designed to be pivoted on 27.

The locking body 26 and the control body 29 are connected to each other via a buffer spring 30 which is a torsion coil spring as shown in FIG. One end of the buffer spring 30 is engaged with the inner side of the bent portion 26a of the locking body 26 on the front end side, and the other end is attached to the middle of the horizontal portion 29b of the control body 29. That is, the buffer spring 30 urges the side end edge of the horizontal portion 29b of the control body 29 and the base end side bent portion 26b of the locking body 26 to come into contact with each other. The acting direction and the magnitude of the elastic force of the buffer spring 30 are set so that the portions 26b and 29b are lightly elastically contacted with each other.

Next, as shown in FIGS. 1 and 2, an electromagnetic drive device 31 is arranged near the vertical portion 29a of the control body 29 and above the tip of the locking body 26. This electromagnetic drive device 31 can switch the moving direction of the movable portion by switching the polarity of the applied DC voltage, and can magnetically move the movable portion that is attracted or extruded into the operating coil and protrudes. In the present embodiment, the plunger 31a, which is a movable part, moves linearly in the operating coil, and at least the plunger 31a attracted to the operating coil is magnetically moved to the yoke. It shall be a so-called monostable latching solenoid that can be adsorbed and moored.

The tip of the plunger 31a of the electromagnetic drive device 31 is connected to the connecting fitting 32 that is swingably attached to the vertical portion 29a of the control body 29 described above, and controls the linear movement of the electromagnetic drive device 31.
I'm supposed to tell 29.

Further, as shown in FIG. 2, the central mounting hole of the control body 29
A control body spring 33, which is a torsion coil spring, is wound around the boss portion connected to 29c. One end of the control body spring 33 is engaged with the outer end of the electromagnetic drive device 31 as shown in FIG. 1, and the other end is engaged with the middle of the horizontal portion 29b of the control body 29. That is, the control body spring 33 always biases the control body 29 and the locking body 26 in the clockwise direction (first illustration) about the support shaft 27.

Next, as shown in FIG. 1, the horizontal portion 29 of the control body 29 is
An inner cylinder of a cylinder lock (not shown), which is rotatably supported by the side plate 2a of the lock box 2, and a swing arm 34 connected to the thumb turn, are provided above the base end side of the lock body 26 and the locking body 26. . The swing arm 34 has a drive pin 35 planted at the tip extending downward, and the locking plate 3 is provided so as to overlap between the swing arm 34 and the horizontal portion 29b of the control body 29.
It is adapted to engage with 6 and the unlocking plate 37.

As shown in FIGS. 4 (a) and 4 (b), these locking / unlocking plates 36 and 37 each have a long hole formed in the central portion in the front-rear direction (left-right direction in the drawing), and are shown in FIG. Lock box 2 as shown
It is mounted so as to be slidable in the front-rear direction by being guided by a pair of guide pins 38, 38 planted in the side plate 2a. In addition, the upper and lower edges of the locking / unlocking plates 36, 37 are cut out in a substantially triangular shape that is symmetrical with each other, and the stepped parts 36a, 37a formed by the cutouts are moved forward by the locking plate 36 ( From the left side in the figure), the unlocking plate 37 contacts the drive pin 35 of the swing arm 34 from the rear side (right side in the figure). Further, bent portions 36b and 37b are formed at the front (left in FIG. 4) end edges of the locking and unlocking plates 36 and 37, respectively, and the front of the tip of the vertical portion 29a of the control body 29 described above is formed. And is located at the rear. In addition, these locking and unlocking plates
A compression spring 39 is bridged over the lower end of each of the plates 36, 37 so that the plates 36, 37 are always urged in a repulsive direction.

That is, when the swing arm 34 is rotated clockwise as shown in FIG. 7, the drive pin 35 is locked by the locking plate.
The stepped portion 36a of 36 is pressed and biased, and the locking plate 36 slides forward (leftward in the drawing), and the control body 29 is rotated counterclockwise through the bent portion 36b. Further, as shown in FIG. 9, when the swing arm 34 is rotated counterclockwise, the drive pin 35 presses and urges the step portion 37a of the unlocking plate 37, and the unlocking plate 37 moves backward (see FIG. Slide to the center right),
The control body 29 is rotated clockwise through the bent portion 37b.

A lock notch 40 is formed on the upper edge of the locking plate 36 so that the lock plate 36 can be engaged with the slider 41.

The slider 41 is a member for setting the electric lock 1 of the present embodiment to either an electric lock for automatic locking or an electric lock for repeated locking / unlocking, and is attached to the rear plate 2c of the lock box 2. And is vertically movable. The slider 41 has an L-shaped cross section, and a lock pin 42 is planted at the upper end thereof. The lock pin 42 engages with the lock notch 40 of the locking plate 36 when the slider 41 is lowered. On the other hand, the base end of the switching lever 43 is rotatably supported by the lower end of the slider 41.

As shown in FIG. 1, the switching lever 43 is formed in a shape in which one edge of a substantially elliptical flat plate extends in a substantially triangular shape, and a long hole 43a is formed at a free end. There is. The elongated hole 43a is connected to the connecting pin 44 that is planted at the tip of the horizontal portion 29b of the control body 29 described above. Then, in the state where the slider 41 is pulled up, it is fixed by a screw or the like, that is, in the locking / unlocking repetition mode, the switching lever 43
Is a position where it does not interfere with the movement locus of the latch bolt 3 described above, and the slider 41 is lowered downward,
In other words, as shown in FIG. 10, the lock pin 42 is the locking plate.
It is fixed by a screw or the like at a position where it engages with the lock notch 40 of 36, that is, in the automatic locking mode, the one extended side edge of the switching lever 43 is set to a position where it interferes with the latch bolt 3. It has become.

Next, the operation of the electric lock configured as described above will be described.

The slider 41 is fixed at the upper side and is set to the locking / unlocking repeat mode.

First, FIG. 1 shows a door closed state which is not locked. In this state, the locking end 28 of the locking body 26 is stopped at a position where it does not interfere with the movement locus of the locking step portion 8 of the latch bolt 3, and since the trigger head 20 does not project, the catch lever 14 also twists. Due to the bias of the spring 18, it does not engage with the locking piece 16 of the latch head 7. That is, it is in the unlocked state.

Now, the door provided with this electric lock is opened from the closed state. Rotate the knob or handle to rotate the bolt operation member 10
Rotate clockwise. As shown in FIG. 5, the bolt operating member 10 moves the latch bolt 3 in the depth direction (rightward in the figure) of the lock box 2 by its operating portion 10b. Then, the latch head 7 is retracted from the bolt locking hole 6a formed in the strike plate 6 of the door frame 5, and the door 11 is opened by pushing or pulling.

When the door 11 is opened, the trigger head 20 that has been pushed in by the strike plate 6 advances due to the bias of the compression coil spring 25 and projects from the front plate 4 of the lock box 2. Then, since the trigger plate 21 also moves forward, the catch lever 14
Push the protrusion 14c of the
Rotate. Then, the stop pin 17 of the catch lever 14 moves to a position that interferes with the movement locus of the locking piece 16 of the latch head 7. That is, when the knob or the like is released, as shown in FIG. 6, the bolt operating member 10 returns to its original position by the biasing force of the return spring 12, and the latch bolt 3 has the stop pin 17 and the locking piece 16 attached thereto. It engages and stops in the projecting state which left only the slope of the tip of the latch head 7.

To open the door from this open state without locking it, it is not necessary to turn a knob or the like. When the door is closed, the strike plate 6 of the door frame 5 contacts the slope of the latch head 7 and the slope of the trigger head 20. The heads 7 and 20 can be pushed in by contacting each other, and when the door is closed, the door is unlocked as shown in FIG.

Next, in order to automatically lock the door when the door is closed from the opened state shown in FIG. 6, as shown in FIG. 7, the thumb turn on the indoor side is rotated to the closed side. As shown in this figure, when the thumb turn is rotated, the swing arm 34 connected to the thumb turn is rotated clockwise, and the lock plate 36 is guided through the drive pin 35 by the guide pin 38 to the front ( Move it to the left in the figure). The locking plate 36 is
Due to the movement, the bent portion 36b causes the vertical portion 2 of the control body 29 to move.
9a Push the tip from behind. Then, this control body 29
Rotate counterclockwise around the support shaft 27, and
The plunger 31a of 31 is degenerated. At the same time, the locking body 26 is driven by the buffer spring 33 in the operating direction of the control body 29. However, the locking body 26 is stopped midway because the locking end 28 is restricted by the upper surface of the latch head 7. At this time, the buffer spring 33
The locking body 26 is constantly urged in the direction in which the latch head 7 (latch bolt 3) is engaged (counterclockwise direction in the drawing).

Then, after performing the locking operation when opening the door as described above,
When the door is closed, the strike head 6 of the door frame 5 causes the latch head 7 and the trigger head 20 to move backward simultaneously (to the right in the figure).
Moves to, the stop pin 17 of the catch lever 14 is released, the latch head 7 moves forward, and is inserted into the bolt locking hole 6a of the strike plate 6. Then, as shown in FIG. 8, the locking end 28 of the locking body 26 is engaged with the locking step portion 8 of the latch head 7. In this state, turn the knob etc. to operate the bolt operating member 10.
Even if the lever is rotated, the latch bolt 3 has the locking step portion 8 at the locking end 28.
Since it is engaged with, it cannot move to the rear (right in the figure),
You cannot open the door. That is, the locking end of the locking body 26 stops at the locking position, and the locking state is achieved.

Next, in order to unlock the door when the door is closed, first, the thumb-turn on the indoor side is turned in the opening direction, or the cylinder lock is turned from the outdoor side by using a duplicate key. As shown in FIG. 9, when the swing arm 34 connected to the thumb turn and the cylinder lock is rotated counterclockwise, the unlocking plate 37 is guided by the guide pin 38 via the drive pin 35 to the rear ( Move to the right in the figure). As the unlocking plate 37 moves,
The tip of the vertical portion 29b of the control body 29 is pressed from the front (left side in the drawing) by the 37b. Then, the control body 29 rotates clockwise around the support shaft 27, and the plunger of the electromagnetic drive device 31 is rotated.
Extend 31a. At the same time, the locking body 26 is driven in the operating direction of the control body 29 by the urging of the buffer spring 33. Then, the locking end 28 is separated from the position where the locking step portion 8 of the latch bolt 3 is engaged, that is, the locking position. The separated locking end 28 of the locking body 26 does not interfere with the movement locus of the locking step portion 8 of the latch bolt 3 and enters the state shown in FIG. 1, that is, the unlocked state.

It should be noted that the swing arm 34, which rotates during locking or unlocking, is released when the hand is released, and is returned to its original position by the urging force of the compression spring 33 arranged between the unlocking plates 36 and 37. It has become. Further, in the above description of the operation, the locking or unlocking by the thumb key and the lock of the cylinder lock, that is, the manual operation has been described.
It can be locked or unlocked by sending to. In this case, the plunger 31a of the electromagnetic drive device 31 is the first
From the state shown in the figure (unlocked state), when retracted by an applied electric signal, the vertical portion 29a of the control body 29 is irrespective of the swing arm 34, the locking plate 36, and the unlocking plate 37 as shown in FIG. It is moved forward (to the left in the drawing), and each part is actuated in the same manner as the manual locking operation described above to perform locking. At this time, as described above, the plunger 31a is moored in the retracted position and remains in the locked position until the unlock signal is generated. From the locked state, an electric signal for unlocking is generated by the electromagnetic drive device 31.
When it is applied, the mooring of the plunger 31a is released and the plunger 31a moves in the extension direction. This movement also applies the urging force of the control body spring 33 to move the vertical portion 29a of the control body 29 rearward (to the right in the figure), and each portion is actuated in the same manner as the manual unlocking operation described above to unlock. I do.

Next, the operation in the automatic locking mode in which the slider 41 is fixed downward, that is, the lock pin 42 of the slider 41 is engaged with the lock notch 40 of the locking plate 36 will be described.

As shown in FIG. 10, when the slider 41 is fixed below, the one side edge formed by the extension of the switching lever 43 comes to a position where it interferes with the movement trajectory of the latch bolt 3.

That is, when the knob or the like is rotated to open the door from the unlocked closed state, the base end of the latch bolt 3 retracted by the bolt operating member 10 contacts the switching lever 43 and pushes it up. Then, the free end of the switching lever 43 rotates clockwise around the base end to move the horizontal portion 29b of the control body 29. Then, the locking body 26 rotates in the locking position direction in conjunction with the control body 29. In the opened state, the locking end 28 of the locking body 26 stops on the upper surface of the latch head 7. When the door is closed from this state, the latch bolt 3 advances and the locking step 28 is engaged with the locking end 28 to lock the door. In other words, if the door is closed after it is opened, it will be locked.

The unlocking is performed by a key for turning a cylinder lock connected to the swing arm 34, a card for operating the electromagnetic drive device 31, an electric signal by input of a password, or the like. The detailed operation of each part is the same as the operation in the locking / unlocking repetition mode described above, and thus the description thereof is omitted.

Therefore, in such an electric lock 1, when locking is performed by an operation from the outside, the control body 29 first moves, and this movement is transmitted to the locking body 26 via the buffer spring 30 to lock the locking body 26. It is moved to the position, and the latch bolt 3 and the locking body 26 are engaged to lock. At this time, if the door is in the open state, the latch head 7 of the latch bolt 3 projects only halfway by the catch lever 14, so that the locking body 26 abuts the latch head 7 without engaging with the latch bolt 3 and the locked position. Can't move up. However, the buffer spring 30 that connects the locking body 26 and the control body 29 absorbs the difference in the moving distance (rotation angle) between the locking body 26 and the control body 29 by elastically deforming. That is, when the latch head 7 of the latch bolt 3 is released from the catch lever 14 by the closing door and protrudes, the action of the buffer spring 30 moves the locking body 26 to the same angle as the control body 29, that is, to the locking position, and the latching The bolt 3 and the locking body 26 are engaged. And it will be locked. On the other hand, when unlocking is performed by an operation from the outside, with the movement of the control body 29, the locking body 26 interlocks via the buffer spring 30, moves to the unlocking position separated from the locking position, and latches. The engagement with the bolt 3 is released.

In this way, even when the door is open, operation from the outside,
For example, since the locking operation can be performed from the indoor side by a thumb turn or the like and the locking can be automatically performed together with the closing of the door, it is not necessary for the last person leaving the room to always carry the duplicate key as in the conventional case, and thus there is an effect that the trouble is eliminated.

In the present embodiment, the example in which the locking body 26 and the control body 29 rotate about the support shaft 27 to perform locking and unlocking has been described, but as shown in FIG. You may comprise. In this case, the lower end of the control body 129 and the locking body 126
A buffer spring 1 as a compression coil spring is attached to a connecting lever 102 in which the upper end of the is loosely fitted and is prevented from coming off by retaining rings 101, 101.
30 is wound, and the locking body 126 is connected below the control body 129 via the buffer spring 130. The upper end of the control body 129 is connected to a plunger of a so-called bistable latching solenoid 131 in which the plunger 131a is magnetically anchored both during push and pull. On the other hand, the bent portion of the slider 141 carrying the switching lever 143 is led out of the lock box through the notch 103 opened in the lock box, and the position of the switching lever 143 is controlled by this lead portion.

The operation of the electric lock shown in FIG. 11 is the same as that shown in FIG. 1 except that the electric lock shown in FIG. 11 is locked by pushing the solenoid 131 and unlocked by pulling. Therefore, further detailed description will be omitted.

Further, as shown in FIG. 12, a normal solenoid having the same mechanism as in FIG. 11 and having no latching function may be used as the electromagnetic drive device 231.

That is, in FIG. 12, reference numeral 231 indicates a normal solenoid to which the plunger 231a is pushed when energized, and the control body 22 connected to the plunger of this solenoid 22
When the return spring 201 is applied to 9 and the solenoid 231 is not energized, the elasticity of the return spring 201 causes the 12th
Set the unlocked state as shown.

On the other hand, the switch driving piece 202 is formed on the control body 229 so that the micro switch 203 is closed when the control body 229 moves in the locking direction. On the other hand, a control circuit for controlling the current to the solenoid 231 is constructed as shown in FIG. That is, in the figure, reference numeral 204 designates a set-reset type flip-flop, the lock input signal L is supplied to the set input terminal of the flip-flop 204 via the OR gate 205, and the obtained positive output is supplied via the amplifier 206. , To the solenoid 231. To the other input terminal of the OR gate 205, the signal obtained when the micro switch 203 is closed,
It is applied as it is as shown in FIG. 13 or via a monostable multivibrator (not shown). An unlock signal UL is supplied to the reset input terminal of the flip-flop 204.

With the electric lock configured as described above, when the locking signal L is generated, the solenoid 231 is energized to cause the plunger to protrude,
It is locked. When the unlock signal UL is generated, the solenoid
The power supply to 231 is cut off, and the elasticity of the return spring 201 mechanically unlocks. Furthermore, when the control body 229 is driven by the switching lever 243 to mechanically move to the locking position, the micro switch 203 operates to energize the solenoid, and the projecting position of the plunger is metastable by the electromagnetic force of the solenoid 231. Retained.

[Effects of the Invention] As described above, the electric lock according to the present invention is a repetitive locking / unlocking type electric lock, and even when the door is open, the thumb turn on the indoor side can rotate in the locking direction. Since the body and the locking body operate in the locking direction, if the door is closed, the door can be locked automatically like the automatic locking type lock.

That is, unlike the conventional case, the last person to leave the room does not need to perform the locking operation from the outside by using the lock key, etc. Even if the person who finally leaves the room does not have the lock key, etc. There is an effect that the door can be automatically locked by rotating the door and closing the door.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing an embodiment of an electric lock according to the present invention,
2 is a perspective view of a main part according to the same embodiment, and FIG. 3 is a first view.
III-III sectional view in the drawing, FIG. 4 (a) is a plan view of the locking plate, FIG. 4 (b) is a plan view of the unlocking plate, and FIGS. 5 to 9 are electric locks according to the embodiment. FIG. 10 is a side view showing a state of an automatic locking mode, and FIGS. 11 and 12 are plan views showing a main part of an electric lock according to another embodiment of the present invention. FIG. 13 is a block diagram showing an energization control circuit for the solenoid. 1 ... Electric lock, 2 ... Lock box, 3 ... Latch bolt, 26 ...
… Locking body, 29 …… Control body, 30 …… Buffer spring.

Claims (1)

(57) [Scope of utility model registration request] 1. A control body for moving a locking control position between an unlocking control position and an unlocking control position at least in response to an operation from the outdoor side and a manual operation from the indoor side. A latch bolt that is provided and stops when the door is closed and projects longer than the front end surface of the lock box, and when the door is opened, the latch head protrudes shorter than the front end surface of the lock box and stops, and the latch head A locking body that moves between a locking position that engages with a locking step formed on the base and an unlocking position that is separated from the locking position; and the locking when the control body moves to the locking control position. A latch spring for interlocking the control body and the locking body so that the locking body moves to the unlocking position when the control body moves to the unlocking control position. The latch head is in the stop position when the door is opened. When the control body is in the locking control position, the locking body is elastically pressed onto the latch head via a buffer spring so that the locking body does not lock the latch bolt,
An electric lock characterized in that when the latch head of the latch bolt moves to a stop position when the door is closed, the locking body is elastically locked to the locking step portion via a buffer spring.