JPH0318604Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a reliable automatic locking type electric lock that is always automatically locked when the door is closed and can be unlocked by electrical remote control. More specifically, even if the latch is partially protruded, the lock can be reliably locked using the auxiliary lever whose tip is slightly retracted from the tip of the locking lever, and when the latch is unlocked by applying electricity. teeth,
The present invention relates to an automatic locking type electric lock suitable for emergency exits, etc., which remains unlocked unless a return operation is performed afterwards.

As a conventional electric lock for disaster prevention and crime prevention,
The one disclosed in Publication No. 40160 is known.

However, in the configuration of the electric lock disclosed in this publication, if the latch bolt cannot completely protrude inside the notch hole provided in the strike when the door is closed, the tip of the locking bar will be attached to the large diameter part of the latch bolt. The bolt remains resting on the bolt and cannot engage with the jaws of the head of the latch bolt.
The latch bolt could not be held locked by the locking bar.

This idea was made in view of the above circumstances,
Even if the latch bolt (hereinafter referred to as the latch) cannot fully protrude when the door is closed, an auxiliary lever whose tip is slightly set back from the tip of the locking lever is used to reliably hold the latch in the locked state. The purpose is to provide a locking type electric lock.

An embodiment of this invention will be described below with reference to FIGS. 1 to 7.

The general structure of the electric lock of this embodiment includes a latch operation mechanism that moves the latch 1 into and out of the front surface 3 of the lock case 2 by turning the handle, and an automatic mechanism that controls the latch 1 to a predetermined protruding position when the door is closed. It consists of a locking mechanism, an electric unlocking mechanism that regulates the automatic locking mechanism to an unlocked state by electric drive, and a manual unlocking mechanism that regulates the automatic locking mechanism to an unlocked state by rotation of a cylinder or thumb turn.

The latch operation mechanism includes a latch retraction operation mechanism 4 that pushes the latch 1 toward the retraction operation side by retracting the latch 1 into the lock case 2 by turning the handle, and a latch retraction operation mechanism 4 that limits the amount of protrusion of the latch 1 from the front surface 3 when the door is opened. It is comprised of a protrusion amount limiting mechanism 5 and a trigger 6 that protrudes and retracts from the front surface 3 as the door is opened and closed to switch the set state of the latch protrusion amount limiting mechanism 5.

The latch 1 is compressed between a front vertical piece 8a of a U-shaped receiving member 8 fixed to the latch handle 7 and a spring receiving piece 9 fixed to the lock case 2 and fitted externally to the latch handle 7. A spring 10 is inserted between the latch 1 and the latch 1 to push the latch 1 toward the advancing side, that is, toward the side that projects from the front surface 3. Reference numeral 11 denotes an auxiliary latch for protecting the latch, and the double rods 1a, 1a of the latch 1
At the same time, the latch handle 12 is inserted into the through hole 7a of the latch handle 7, and the compression spring 22 is inserted between the latch handles 7 and 12 via the washers 13 and 14. It is biased toward the tip.

The latch retraction operation mechanism 4 includes a latch hub 16 having a fan-shaped outer shape and a square hole 16a into which the handle shaft 15 is fitted, and a rear vertical piece 8b of the receiving member 8 of the latch 1.
a latch actuating lever 17 that has an engaging portion 17a that can come into contact with the latch hub 16 and is coaxially supported with the latch hub 16;
, a slide bar 18 that can move forward and backward in the same direction as the latch 1, and a pivot 19 fixed to the lock case 2.
and an interlocking lever 21 which is pivoted by and biased clockwise by a torsion spring 20. The latch operating lever 17 has a retaining pin 17b in a portion corresponding to the rotation range of the latch hub 16. When the latch hub 16 rotates clockwise, the retaining pin 17b is pushed by the latch hub 16, and the latch operating lever 17 rotates clockwise. As a result, the rear vertical piece 8b of the receiving member 8 is pushed by the engaging portion 17a of the latch operating lever 17. The slide bar 18 also
A retaining pin 18a is located at a portion corresponding to the rotation range of the latch hub 16.
When the latch hub 16 rotates counterclockwise, the retaining pin 18a is pushed by the latch hub 16, causing the slide bar 18 to move in the backward direction. To move the slide bar 18 forward and backward, move the pin 23 provided on the lock case 2 to the slide bar 18.
This is guided by engaging a guide elongated hole 18b formed in the. The interlocking lever 21 has an engagement notch 21a formed on one side edge thereof, and an engagement pin 17c separately provided on the latch actuating lever 17 is engaged with the engagement notch 21a. By biasing the interlocking lever 21 clockwise, the latch operating lever 17 is rotated counterclockwise so that its engaging portion 17a is retracted from the rear vertical piece 8b. Separately, the tip of the interlocking lever 21 is rotatably connected to the rear end of the slide bar 18 via a pin 24, and is biased by the torsion spring 20 of the interlocking lever 21.
The slide bar 18 is configured to be able to return to the advancing operation side. Furthermore, due to the connection between the slide bar 18 and the interlocking lever 21, the counterclockwise rotation of the latch hub 16 is transmitted to the latch operating lever 17 via the slide bar 18 and the interlocking lever 21.
The latch operating lever 17 is pushed toward the clockwise rotation side, with its engaging portion 17a pushing against the rear vertical piece 8b of the receiving member 8. The engagement hole 18c of the slide bar 18, with which the pin 24 of the interlocking lever 21 engages, is an elongated hole to allow rotation of the interlocking lever 21.

The latch protrusion amount limiting mechanism 5 includes a bifurcated lever 27 that is pivotally supported by a pivot 25 and biased clockwise by a torsion spring 26, and a bifurcated lever 27 that is coaxially supported by the pivot 25 and biased clockwise by a torsion spring 28. The latch limit lever 29 is biased in the direction shown in FIG. One branch arm 27a of the bifurcated lever 27 is connected to a receiving piece 2 bent at the upper edge of the latch restriction lever 29.
9a, so that clockwise rotation of the bifurcated lever 27 relative to the latch restriction lever 29 is restricted. On the other hand, the tail end of the latch limit lever 29 is received by a receiving pin 30 fixed to the lock case 2, and rotation in the clockwise direction is limited within a range where the receiving piece 29a does not exceed the horizontal position. It is limited within. As a result, the bifurcated lever 27 and the latch limit lever 29 are integrated by the action of the torsion spring 28, and are biased clockwise by the action of the torsion spring 26, so that the receiving piece 29a is in the rotational position where it becomes horizontal. Stop. A locking piece 31 that can be locked to the rear end of the locking piece 29a of the latch limiting lever 29 extends from the lower surface of the locking member 8 of the latch 1.

The trigger 6 is compressed between a front vertical piece 33a of a U-shaped receiving member 33 fixed to the trigger handle 32 and a spring receiving piece 34 fixed to the lock case 2 and fitted externally to the trigger handle 32. By sandwiching the spring 35, the spring 3
5 presses the trigger 6 toward the advancing operation side, that is, toward the side that protrudes from the front surface 3. The rear vertical piece 33b of the receiving member 33 extends to a position opposite to the other branch arm 27b of the bifurcated lever 27, and locks the lock case 2 of the trigger 6 when the door is closed.
Due to the inward retreat movement, the rear vertical piece 33b of the receiving member 33 pushes the branch arm 27b of the bifurcated lever 27, so that the latch restriction lever 29 can rotate counterclockwise together with the bifurcated lever 27. I have to.

The automatic locking mechanism uses a pivot 3 fixed to the lock case 2.
It is made up of two members: an auxiliary lever 37 which is coaxially supported with common reference numeral 6, and a locking lever 38 whose tip 38a is positioned slightly forward of the tip 37a of the auxiliary lever 37. The auxiliary lever 37 is attached counterclockwise by a torsion spring 41 that is wound around the pivot shaft 36 and has one end locked to a pin 39 of the lever 37 and the other end locked to a pin 40 fixed to the lock case 2. It is strong. On the other hand, the locking lever 38 is secured against the auxiliary lever 37 by a torsion spring 44 which is also wound around the pivot shaft 36 and has one end locked to a pin 42 of the lever 38 and the other end locked to another pin 43 of the auxiliary lever 37. The pin 43 of the auxiliary lever 37 receives the tail end 38b of the lever 37 in the counterclockwise direction. As a result, the two levers 37 and 38 are connected to the torsion spring 4.
1 and 44, the receiving hole 6 of the door receiving member 67 is normally urged in the counterclockwise direction.
The latch 1 does not protrude sufficiently when the door is closed due to foreign matter inside the door 7a, and the locking step 1b of the latch 1 does not advance forward beyond the locking lever tip 38a, causing the locking lever 38 to engage the locking step 1b. Even if a situation occurs where the lock lever 38 does not come in contact with the lock lever 38, the auxiliary lever 37, whose tip end 37a is slightly retracted from the lock lever 38, rotates counterclockwise independently with respect to the lock lever 38. The tip 37a can be engaged with the locking step 1b of the latch 1.

A working pin 45 is separately attached to the upper side of the auxiliary lever 37, and a micro switch 46 is arranged at a predetermined position in the lock case 2 corresponding to the rotation range of the working pin 45, so that the auxiliary lever 37 When the microswitch 46 reaches the rotational position corresponding to the locked state, the actuator 46a of the microswitch 46 is pushed by the action pin 45, so that an ON signal from the microswitch 46 can be transmitted to a remote control room or the like via the lead wire 47. ing.

The electric unlocking mechanism uses a pivot 4 fixed to the lock case 2.
8 and biased counterclockwise by a torsion spring 49;
A connecting bar 53 connects the branch arm 50a and the tip 37a of the auxiliary lever 37 via pins 51 and 39 to form a link together with the levers 37 and 50, and the other branch of the drive transmission lever 50 via the pin 54. It consists of a solenoid 55 in which a plunger 55a is connected to an arm 50b. The solenoid 55 can be energized and controlled from a remote control room through a lead wire 56, and when energized, the plunger 55a moves in the direction shown by the arrow _p1 in FIG.
to drive the suction. As a result, the drive transmission lever 50
rotates clockwise, and the automatic locking mechanism is regulated to the unlocked position via the connecting bar 53. The connecting bar 53 is connected to the drive transmission lever 50 by engaging the pin 51 through the elongated hole 53a, so that the automatic locking mechanism cannot rotate counterclockwise during the unlocking operation by the manual unlocking mechanism. making it acceptable.

The manual unlocking mechanism includes a drive sector gear 57 that is pivotally connected to the lock case 2 and has an engagement hole 57a that engages a cylinder or thumb turn operating bar 52.
and a driven sector gear 5 whose shaft 58 is similarly supported by the lock case 2 and meshes with the sector gear 57.
It consists of 9. A working pin 60 is provided around the non-toothed portion of the driven sector gear 59, and as it rotates counterclockwise, the rear end 3 of the auxiliary lever 37 of the automatic locking mechanism
The operating pin 60 is brought into sliding contact with an arcuate guide surface 37c formed on the side edge of the locking lever 7b, and its pushing action rotates the auxiliary lever 37 toward the unlocking side, that is, in the clockwise direction. This driven sector gear 5
9 is wound around its shaft 58 and has one end connected to a working pin 60.
A pin 61 that is locked to the lock case 2 and has the other end fixed to the lock case 2.
The action pin 60 is biased clockwise by a torsion spring 62 engaged with the guide surface 37 of the auxiliary lever 37.
The side edge of the non-toothed portion of the driven sector gear 59 is received by the pin 61 so as to stop at the rotational position retracted from c. A locking pawl 59a is separately formed on the periphery of the non-toothed portion of the driven sector gear 59, and when the driven sector gear 59 rotates until the working pin 60 fully pushes the auxiliary lever 37 toward the unlocking side, the lock case 2 The locking pawl 59a locks into the engagement hole 63a of the holding lever 63 that is pivoted therein, and the driven sector gear 59
is held in this position.

The holding lever 63 is wound around a pivot shaft 64 that pivots on the lock case 2, and one end is attached to the holding lever 63.
The torsion spring 65, which is engaged with the lock case 2 and whose other end is received on the rear end surface of the lock case 2, biases the spring clockwise, and also forces the backing plate 63b extending from the lower end of the holding lever 63 into the latch 1. facing the rear end,
Due to the retreat of latch 1 when the door is closed, latch handle 12
The holding lever 63 is pushed by pushing the backing plate portion 63b at the rear end, thereby disengaging the locking claw 59a of the driven sector gear 59 from the engagement hole 63a.

A reed switch 66 is disposed at a predetermined position close to the front surface 3 inside the lock case 2, and when the door is closed, a magnet 68 provided at a predetermined position inside the door receiving member 67 facing the reed switch 66 is activated. By operating the reed switch 66 and transmitting the signal to a remote control room or the like via the lead wire 69, the open/closed state of the door can be checked from a remote location.

Next, regarding the operation of this electric lock, unlocking by manual unlocking mechanism, unlocking by electric unlocking mechanism,
The explanation will be divided into door opening operation and door closing operation.

Unlocking by Manual Unlocking Mechanism In the locked state shown in FIG. 7, when the cylinder or thumb turn is operated to rotate the driving sector gear 57 clockwise, the driven sector gear 59
rotates counterclockwise against the biasing force of the torsion spring 62, and as a result, the action pin 60 moves against the auxiliary lever 3.
7. Press the guide surface 37c. Therefore, the auxiliary lever 37 and the locking lever 38 rotate clockwise against the biasing force of the torsion spring 41, and the locking lever 38, which was previously locked in the locking step 1b of the latch 1, rotates clockwise.
8 retreats upward and the locked state is released. Further, as the rotation of the driven sector gear 59 progresses, the locking pawl 59a on the periphery of the non-toothed portion pushes the holding lever 63,
Eventually, the locking pawl 59a locks into the locking hole 63a, and the working pin 60 is held at the rotational position in which it pushes the rear end 37b of the auxiliary lever 37, as shown in FIG.

Unlocking by electric unlocking mechanism In the locked state shown in Fig. 7, if an emergency such as a fire occurs and you want to unlock from a remote location such as a control room, you can open the lock from a remote location such as a control room by operating a switch from the control room via the lead wire 56. When the solenoid 55 is energized, the plunger 55a is driven to attract. Therefore, as shown in FIG.
is rotated clockwise against the biasing force of the torsion spring 49, and the rotational displacement is transmitted to the auxiliary lever 37 via the connecting bar 53. The lock is retracted upward from the locking stepped portion 1b, and the lock is unlocked. This unlocked state is maintained as long as the solenoid 55 continues to be energized. Also, at this time, the working pin 4 of the auxiliary lever 37
5 is released from the pressure on the actuator 46a of the micro switch 46, and the micro switch 46
The off signal is transmitted to the control room via the lead wire 47, and it can be confirmed from the control room that the electric unlocking is completed.

Door Opening Operation In the closed state shown in FIG. 4 where the door is unlocked by the manual unlocking mechanism, the trigger 6 is pushed by the door receiving member 67 and retreated into the lock case 2, so the receiving member 33 The rear vertical piece 33b pushes the branch arm 27b of the bifurcated lever 27. Therefore, the latch limiting lever 29 is rotated and retracted together with the bifurcated lever 27 in a downward direction out of the movement range of the locking piece 31.

When the handle is operated in this state, for example, the latch hub 16 is rotated clockwise, the upper edge of the latch hub 16 hits the retaining pin 17b of the latch operating lever 17.
The latch operating lever 17 rotates clockwise against the urging force of the torsion spring 20 of the interlocking lever 21.
As a result, the engaging portion 17a of the latch actuating lever 17
presses the rear vertical piece 8b of the catch member 8 of the latch 1,
The latch 1 is retracted into the lock case 2 against the biasing force of the compression spring 10. As the latch 1 retreats, the backing plate portion 63b of the holding lever 63 is pushed against the biasing force of the torsion spring 65.
is rotated counterclockwise, and the locking claw 59a of the driven sector gear 59 is disengaged from the engagement hole 63a of the holding lever 63, and as shown in FIG. rotates clockwise and returns to the rotation position regulated by the pin 61. Therefore, the auxiliary lever 3 by the action pin 60
7 is released, but at this time the locking stepped portion 1b of the latch 1 is in a position retracted from the tip of the locking lever 38, so it does not return to the locked state again.
In addition, when the latch 1 is in the retracted state, the locking piece 31 of the receiving member 8 is moved rearward from the rear end of the receiving piece 29a when the latch limiting lever 29 is in the horizontal position.

When the handle is held in the above rotational state and the door is opened, the pressure from the door receiving member 67 is released and the trigger 6 is pushed by the compression spring 35 and protrudes from the front surface 3. Along with this, the receiving member 3
The pressure on the bifurcated lever 27 by the rear vertical piece 33b of No. 3 is released, and the bifurcated lever 27 is released from the latch limit lever 2.
9, the latch limit lever 29 is rotated back in the clockwise direction, and the receiving piece 29a of the latch limit lever 29 is regulated to a rotation position in which it assumes a horizontal position.

When the rotation of the handle is released with the door fully open, the interlocking lever 21 returns to clockwise rotation, causing the latch actuation lever 17 to rotate counterclockwise and engage its engaging portion 17a. The pressure on the rear vertical piece 8b of the receiving member 8 of the latch 1 is released.
Therefore, the latch 1 is pushed by the compression spring 10 and moves forward, but at this time, the locking piece 31 of the receiving member 8 comes into contact with the receiving piece 29a of the latch limit lever 29, so the latch 1 is moved to its locking step 1b. is locking lever 3
It is stopped at the advanced position shown in FIG. 6, which is retracted from the tip of 8.

Note that the reed switch 66, which has been turned off due to the magnetic force of the magnet 68 in the door receiving member 67 in the closed door state, is switched to the on state when the door is opened, so that the on signal is transmitted to the lead wire. 69 to a remote control room, etc., so that opening of the door by an illegal intruder or the like can be monitored from a remote location.

When the latch 1 is moved backward by operating the handle, when the latch hub 16 is rotated counterclockwise, the lower edge of the latch hub 16 hits the retaining pin 18a of the slide bar 18, and the slide bar 18
moves backward and rotates the interlocking lever 21 counterclockwise, so that the latch 1 can be moved backward by the latch operating lever 17 in this case as well.

Door closing operation When moving from the door open state shown in Figure 6 to the door closing operation,
The latch 1 and the trigger 6 are pushed by the door receiving member 67 on their guide slopes and retreated inward into the lock case 2. Accordingly, the locking piece 31 of the locking member 8 of the latch 1 becomes the locking piece 29a of the latch limiting lever 29.
At the same time, the double lever 27 is pushed by the rear vertical piece 33b of the receiving member 33 of the trigger 6, and the latch restriction lever 29 is rotated downward. When the door closing operation further progresses and the latch 1 reaches a position facing the receiving hole 67a of the door receiving member 67, the latch 1 is moved by the compression spring 10 and the holding lever 6.
3, the receiving hole 67 is opened as shown in FIG.
Rush into a. At this time, the latch limit lever 2
9 is in the downwardly rotated and retracted state, the amount of protrusion of the latch 1 is not limited by the latch limiting lever 29, and the locking step 1b is in a position forward of the tip of the locking lever 38. The latch 1 advances until the latch step 1b engages with the distal ends of the locking lever 38 and the auxiliary lever 37, thereby locking the latch 1.

FIG. 8 shows another embodiment applied to an electric lock having a separate emergency manual unlocking mechanism.

In this embodiment, the electric locking mechanism is operated by solenoid 5.
5 and a drive transmission lever 50', and the connecting bar 53 used in the previous embodiment is omitted. A working pin 70 is provided on the branch arm 50'b of the drive transmission lever 50', and this working pin 70 is inserted into the engagement hole 3 formed in the upper side of the auxiliary lever 37' of the automatic locking mechanism.
7'd and rotates the drive transmission lever 50' counterclockwise, thereby pushing the auxiliary lever 37' clockwise, that is, toward the unlocking operation side. When the solenoid 55 is energized to attract the plunger 55a, the operating pin 70 of the drive transmission lever 50' does not push the auxiliary lever 37', so that the lock is achieved when the solenoid 55 is energized. Therefore, unlocking is achieved by stopping the energization to the solenoid 55, that is, by causing the plunger 55a to protrude, which is the opposite of the previous embodiment. The engagement hole 37'd of the auxiliary lever 37' is a horizontally elongated hole, which allows unlocking by the manual unlocking mechanism when the electric unlocking mechanism is in the locked state (when the solenoid 55 is energized). I'm trying to make it happen.

On the other hand, the manual unlocking mechanism has a driving sector gear 57 and a driven sector gear 59', almost the same as in the previous embodiment.
When the driven sector gear 59' comes to the rotational position that restricts the auxiliary lever 37' of the automatic locking mechanism to the unlocked state, the holding lever 63 of the embodiment described above holds the driven sector gear 59' at this position. There is no equivalent.

In this embodiment, the locking pawl 59'a formed on the periphery of the non-toothed portion of the driven sector gear 59' pushes the rear vertical piece 8b of the receiving member 8 of the latch 1, and the automatic locking mechanism retracts to the unlocked position. In parallel with this, latch 1 is moved back. Therefore, while the tips of the auxiliary lever 37' and the locking lever 38 are pivoting upward, the locking step 1b of the latch 1 moves rearward from the tips of the levers 37', 38. Therefore, if the handle is rotated in this state and the latch 1 is kept in the retracted position and the door is opened, the latch protrusion limit mechanism 5 will cause the latch to be in the unlocked state as in the previous embodiment. The door can be opened while maintaining the

The emergency manual unlocking mechanism includes a slide bar 72 arranged so as to be able to move forward and backward into the lock case 2 from an auxiliary case 71 attached to the rear end of the lock case 2.
and an engagement hole 7 into which the shaft 73 of the emergency operation lever is engaged.
The unlocking drive hub 74 has an axis 4a at its axis, is pivotally supported within the auxiliary case 71, and has one end connected to the rear end of the slide bar 72.

At the tip of the slide bar 72, a pin 75 is separately provided on the back side of the non-toothed part of the driven sector gear 59'.
The locking piece 72a that can come into contact with the
9' rotates counterclockwise against the biasing force of the torsion spring 62, thereby rotating the auxiliary lever 37' toward the unlocking side. An engagement hole 72b is formed in the connection portion of the slide bar 72 with the unlocking drive hub 74,
A connecting pin 76 provided on the arm 74b of the unlocking drive hub 74 is engaged with the engagement hole 72b.

A click spring mechanism 77 is separately connected to the connecting pin 76 to move the slide bar 72 to an advanced position that does not restrict the unlocking operation by a normal manual unlocking mechanism, and to rotate the driven sector gear 59' corresponding to unlocking. It is possible to selectively and stably hold it in the retracted position where it is pressed up to the retracted position. The click spring mechanism 77 has a support shaft 78 rotatably provided on the auxiliary case 71, and a rear end thereof is inserted into a horizontal hole 78a penetrating the support shaft 78, and a distal end head portion 79a is connected to the unlocking drive hub 74. Pushing rod 79 pivotally connected to connecting pin 76
The head portion 79 is inserted into this pushing rod 79.
a and a compression spring 80 acting between the support shaft 78 and the support shaft 78. The pushing rod 79 is pushed toward the support shaft 78 against the compression spring 80 while the arm 74b of the unlocking drive hub 74 is rotating back and forth, and corresponds to the advanced and retracted positions of the slide bar 72. When the arm 74b reaches the forward and backward rotational positions, it protrudes and stably holds the unlocking drive hub 74 in these rotational positions by the action of the spring.

The engagement hole 72b of the slide bar 72 is formed in an inverted L shape, thereby allowing vertical displacement of the connecting pin 76 as the unlocking drive hub 74 rotates, and smooth operation of the click spring mechanism 77. I'm trying to do it.

A separate branching arm 74c is formed on the unlocking drive hub 74, and a micro switch 81 is separately provided in the auxiliary case 71.
4c is the actuator 8 of the micro switch 81
From the initial state of pressing 1a, the branch arm 74c
is switched to a state in which the pressure on the actuator 81a is released. As a result, the on/off state of the micro switch 81 changes depending on whether the emergency manual unlocking mechanism is operated or not, and this on/off signal is sent to a remote control room via the lead wire 82. sent to. If the emergency manual unlocking mechanism is operated by an illegal intruder, this can be confirmed from a remote control room or the like based on the signal from the micro switch 81. In FIG. 8, 83 and 84 are guide holes formed in the lock case 2 and the auxiliary case 71 to guide the forward and backward movement of the slide bar 72.

In addition, in the previous example, an electric lock without such an emergency manual unlocking mechanism was shown,
For example, in FIG. 1, the slide bar 75 is arranged as shown by the imaginary line, and the slide bar 75 is attached to the pin 75 provided on the back side of the non-toothed portion of the driven sector gear 59.
2, it is also possible to forcibly restrict the rotation of the driven sector gear 59 toward the unlocking side using a similar emergency manual unlocking mechanism.

The other configurations and operations are the same as in the previous embodiment.

Since the electric lock of this invention is constructed as described above, it produces the following effects.

(1) In the electric lock of the present application, even if the latch cannot be held in the locked state by the locking lever because the latch cannot fully protrude into the receiving hole, the tip of the latch is slightly retracted from the tip of the locking lever. The auxiliary lever, which is configured to rotate in the locking direction independently of the locking lever, performs locking by rotating in the locking direction, so even if the latch can only be partially extended, the lock can be reliably locked. I can do it.

(2) This application is an automatic locking type electric lock that is always automatically locked when the door is closed. However, when the door is unlocked by energizing, the automatic locking mechanism is disabled unless a reset operation is performed afterwards. Equipped with an electric unlocking mechanism that resets to the unlocked state,
When the electric lock of the present invention is used for an emergency exit door, a person who escapes from the emergency door in an emergency situation does not have to perform the unlocking operation each time, and can quickly escape from the emergency exit.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of this invention.
2 to 7 are explanatory diagrams showing the operation, respectively, and FIG. 8 is a longitudinal cross-sectional view of a main part showing another embodiment. 1...Latch, 4...Latch retraction operation mechanism, 5
...Latch protrusion limit mechanism, 6...Trigger, 1
6...Latch hub, 17...Latch operation lever,
18...Slide bar, 27...Double lever, 2
9... Latch limit lever, 31... Locking piece, 3
7, 37'...Auxiliary lever, 38...Lock lever,
50, 50'... Drive transmission lever, 53... Connection bar, 55... Solenoid, 57... Drive sector gear, 59, 59'... Driven sector gear, 6
3... Holding lever, 72... Slide bar, 74
...Unlock drive hub, 77...Click spring mechanism.

Claims (1)

[Scope of claim for utility model registration] A latch operation mechanism that moves the latch in and out by rotating the handle, an automatic locking mechanism that automatically regulates the latch to the locked position when the door is closed, and an electric drive that unlocks the automatic locking mechanism. In an automatic lock type electric lock, which is equipped with an electric unlocking mechanism that resets the automatic locking mechanism to the unlocked condition and a manual unlocking mechanism that resets the automatic locking mechanism to the unlocked condition by rotating the cylinder or thumb turn, the automatic locking mechanism is attached to the lock case. A locking lever is pivoted to the locking lever and its tip is spring-biased in the direction of locking the latch, and a locking lever is coaxial with the locking lever and its tip is slightly retreated from the tip of the locking lever and spring-biased in the same direction as the locking lever. The auxiliary lever is biased and can be rotated independently in the locking direction with respect to the locking lever, and is rotated integrally with the locking lever in the unlocking direction by a pin that receives the tail end of the locking lever. The electric unlocking mechanism is formed by a transmission mechanism that swings the locking lever together with the auxiliary lever between the locked position and the unlocked position by the movement of the drive transmission lever that is rotated around a pivot by a solenoid. The locking mechanism includes a drive sector gear that is rotatably operated by a cylinder or a thumb turn, and an action pin that meshes with the drive sector gear and pushes the tail end of the auxiliary lever to rotate the locking lever in the unlocking direction. The operating pin is formed by a driven sector gear that is rotationally biased in a direction that does not push the auxiliary lever, and the holding lever that locks the driven sector gear is pivoted within the lock case and is attached to the driven sector gear side. When the driven sector gear is rotated in a direction that pushes the tail end of the auxiliary lever, the locking member provided on the driven sector gear is formed at a corresponding position on the holding member. An electric lock characterized in that the electric lock is held by being engaged with an engaging hole.