JPH065481Y2 - Electric lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an electric lock that can be locked and unlocked by electric control.

(Prior Art) As an electric lock of this type, (a) the applicant of the present invention,
I applied for the one shown in the 1968 publication. This includes a latch operating mechanism that drives the latch to be retracted and retracted by rotating the handle, a locking member that engages with the latch to restrict the latch to the locked position, an electric locking and unlocking mechanism that restricts the locking member to the locked and unlocked state, and The electric locking / unlocking mechanism is provided with a bistable latching solenoid for switching and displacing the plunger between an advancing stable position and a retracting stable position by momentary energization, and one end linked to the solenoid plunger and the other end The transmission lever is linked to the locking member and is configured to switch and displace the locking member between the unlocked position and the locked position by the backward displacement of the plunger.

(B) Further, a locking / unlocking device for a door lock described in Japanese Utility Model Publication No. 55-50292 is also known. As described in (a) above, this is different in specific configuration, but generally, a latch operation mechanism, a locking member (locking piece) that engages with the latch to restrict the latch to the locking position, and a locking member. An electric locking / unlocking mechanism and a manual locking / unlocking mechanism for restricting the member to the locked / unlocked state, and the electric locking / unlocking mechanism is provided with an energizing / unlocking solenoid and a transmission lever. According to the one disclosed in this publication, the door is automatically locked whenever the door is closed, and the unlocking can be performed mechanically or electrically.

(Problems to be solved by the invention) However, according to the conventional example (a), when the user goes out, he / she cannot go out unless he / she locks the door with the key or the card every time after closing the door, There are inconveniences such as the troublesome operation of locking with this key or card.

According to the conventional example (b), although the above-mentioned inconvenience can be eliminated, there is a problem that the unlocked state cannot be selected when the door is closed because it is always locked automatically when the door is closed.

The present invention provides a solution to all of these problems.

(Means for Solving Problems) As means for solving the above problems, the present invention relates to a latch operating mechanism, a locking member that engages with the latch to restrict the latch to a locking position, and a locking member that is electrically driven. At least an electric locking / unlocking mechanism for restricting the locking / unlocking state to a locked / unlocked state and a manual locking / unlocking mechanism for controlling the locking / unlocking state of the locking member to the locking / unlocking state by the rotation of the cylinder or thumb-turn. A bistable latching solenoid that is switched between an advanced stable position and a retracted stable position for displacement, and one end linked to the plunger of the bistable latching solenoid and the other end linked to the locking member, and the locking member is unlocked by the forward and backward displacement of the plunger. An electric lock comprising a transmission lever for switching and displacing between a locked position and a locked position, wherein the locking member is in a latched state. A locking lever whose engagement portion is biased by a spring so as not to engage with the engagement receiving portion of the latch, and is pivotally supported by the same pivot as the locking lever and connected to a manual locking / unlocking mechanism, and a front end portion. Of the auxiliary locking lever formed so as not to engage the engagement receiving portion of the latch, and by closing the thumb-turn of the manual locking / unlocking mechanism in the door-latch state after rotating in the locking direction, It is characterized in that the tip of the latch is projected into the receiving hole of the door receiving member by the maximum allowable length, and the engaging portion of the locking lever is locked to the engaging receiving portion of the latch.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

The electric lock of this embodiment is mainly a latch having a latch retracting operation member (4) for retracting the latch (1) in the front surface of the lock case (2) by rotating the knob or lever handle. The operating mechanism (A) and the engagement receiving portion (1a) of the latch (1)
Locking mechanism (B) that regulates the latch (1) to a predetermined protruding position in the state of being engaged with and disengaged from the motor, and electric locking and unlocking that switches the locking mechanism (B) between the locked state and the unlocked state by electric drive. It comprises a mechanism (C) and a manual locking / unlocking mechanism (D) for displacing the locking member (B) to the locked position side and the unlocked position side by the rotation of the cylinder or thumb turn.

The latch operating mechanism (A) includes a latch retracting operation member (4) that retracts the latch (1) by the rotation of the knob and lever handle described above and retracts into the lock case (2), and a latch ( 1)
Of the latch protrusion amount limiting member (5) for limiting the protrusion amount from the front surface (3) and the latch protrusion amount limiting member (5) protruding and retracting from the front surface (3) when the door is opened and closed are switched. It consists of a trigger (6).

The latch (1) is a U-shaped receiving member fixed to the latch handle (7).
Insert the spring (10) between the front vertical piece (8a) of (8) and the spring receiving piece (9) externally fitted to the latch handle (7) fixed to the lock case (2). The biasing force of the spring (10) constantly presses the latch (1) toward the advancing operation side, that is, the side projecting from the front surface (3). (11) is an auxiliary latch for latch protection, which is inserted between the forked portions (1b) and (1b) of the latch (1), and the latch handle (12) is inserted through the through hole of the latch handle (7). Insert the spring (15) between the latch handles (7) and (12) through the washers (13) and (14).
The latch (1) by mounting the auxiliary latch
(11) is urged to the outside of the lock case (2).

The latch retracting operation member (4) has a generally fan-shaped latch hub (17) having a square hole (17a) into which the operation shaft (16) connected to the knob or lever handle fits, and a latch (1) receiving member. A latch actuating lever (18) coaxially supported by the latch hub (17) having an engaging portion (18a) capable of contacting the rear vertical piece (8b) of the stop member (8).
And a slide bar (19) that can move back and forth in the same direction as the latch (1) and a pivot shaft (20) fixed to the lock case (2), and is urged clockwise by a torsion spring (21). Interlocking lever
(22) consists of

The latch actuating lever (18) has a receiving pin (18b) at a portion corresponding to the rotation area of the latch hub (17), and when the latch hub (17) is rotated clockwise, the receiving pin (18b) is moved to the latch hub. The latch actuating lever (18) is rotated clockwise by being pushed by (17). As a result, the rear vertical piece (8b) of the receiving member (8) is pushed by the engaging portion (18a) of the latch operating lever (18). The slide bar (19) also has a receiving pin (19a) at a portion corresponding to the rotation area of the latch hub (17), and the latch hub (17) is pushed counterclockwise so that the slide bar (19) moves backward. I am trying to move. The slide bar (19) can be moved back and forth by the lock case (2).
The pin (23) provided on the slide bar (19) is inserted into the elongated guide hole (19b) to guide the same. The interlocking lever (22) has an engaging notch (22a) formed at one side edge thereof, and an engaging pin (18c) separately provided on the latch actuating lever (18) engages with the engaging notch (22a). Then, the torsion spring (21) urges the interlocking lever (22) in the clockwise direction so that the engaging portion (18a) of the latch operating lever (18) retracts from the rear vertical piece (8b). It is designed to rotate back to.

Separately, the tip of the interlocking lever (22) is rotatably connected to the rear end of the slide bar (19) via a pin (24),
The torsion bar (21) of the interlocking lever (22) is urged so that the slide bar (19) can return to the advancing operation side.
Also, by connecting the slide bar (19) and the interlocking lever (22),
The counterclockwise rotation of the latch hub (17)
Latch activation lever (18) via (19) and interlocking lever (22)
Is transmitted to the latch actuating lever (18) and its latching portion (18a)
Is pushed clockwise toward the side where the rear vertical piece (8b) of the receiving member (8) is pushed. The engaging hole (19c) of the slide bar (19) with which the pin (24) of the interlocking lever (22) engages is a long hole, and the interlocking lever (22)
Is allowed to rotate.

The latch protrusion amount limiting member (5) is a bifurcated lever (27) pivotally supported by the pivot shaft (25) and biased clockwise by a torsion spring (26).
And a latch limiting lever (29) biased counterclockwise by a torsion spring (28) pivotally supported coaxially with the bifurcated lever (27) by a pivot (25). One branch arm (27a) of the forked lever (27) is received by a catch piece (29a) formed by bending on the upper edge of the latch limit lever (29), and the latch limit lever (29) is received.
The clockwise rotation of the bifurcated lever (27) with respect to (29) is restricted. Meanwhile, the latch limit lever (29)
Has its tail end fixed to the lock case (2) with the receiving pin (3
(0) to receive the rotation in the clockwise direction.
A) is restricted within the range that does not exceed the horizontal posture. This allows the forked lever (27) and the latch limit lever (2
It is integrated with 9) by the action of the torsion spring (28),
It is urged clockwise by the action of the torsion spring (26), and
9a) stops at the turning position where it becomes horizontal. On the lower surface of the receiving member (8) of the latch (1), a locking piece (31) that can be locked to the rear end of the receiving piece (29a) of the latch limiting lever (29) is extended. .

The trigger (6) includes a front vertical piece (32a) of a U-shaped mounting member (32) fixed to the rear part of the trigger, and a spring receiving piece fixed to the lock case (2) and fitted on the rear part of the trigger (6). A compression coil spring (34) is mounted between the spring (34) and the spring (34), and the trigger (6) is pressed toward the advancing operation side, that is, the side projecting from the front surface (3). . Rear vertical piece (32b) of mounting member (32)
Is extended to a position facing the other branch arm (27b) of the double-legged lever (27), and the trigger (6) is retracted inwardly when the door is closed. (32) By pushing the branch arm (27b) of the forked lever (27) with the rear vertical piece (32b), the latch limiting lever (29) can rotate counterclockwise integrally with the forked lever (27). I am trying.

The locking member (B) includes a locking lever (40) and an auxiliary locking lever (41) which are coaxially supported by a pivot shaft (42) fixed to the lock case (2).
It consists of members.

The engaging portion (40a) of the locking lever (40) is urged counterclockwise by the spring (45), and when the latch (1) is in the latched state as shown in the second illustration, the upper surface (1c) thereof is When abutting or approaching and in the locked state as shown in FIG. 4, the engagement receiving portion (1a)
It is formed so as to be locked to. Also, the auxiliary locking lever
The front end portion (41a) of the (41) is latched when the front end portion (41a) is rotated in the counterclockwise direction in the latched state shown in FIG.
(1) so as not to engage with the engagement receiving portion (1a)
a) It is formed so as to be located at a rear position further away. Therefore, the locking member (B) performs the thumb-turn locking operation of the manual locking / unlocking mechanism (D) when the door is opened, and then closes the door, thereby the engaging portion (40a) of the locking member (B). Has a latch
It is locked to the engagement receiving portion (1a) of (1) to prevent the latch (1) from retracting and is automatically locked.

The locking lever (40) is wound around the pivot shaft (42), one end of which is locked to the pin (43) of the locking lever (40) and the other end of which is engaged with the pin (44) of the auxiliary locking lever (41). With the torsion spring (45) stopped,
The auxiliary lock lever (41) is urged counterclockwise and the tail end (40b) of the auxiliary lock lever (41) is pinned (44) to the auxiliary lock lever (41).
It is locked with.

A working pin (46) is attached to the upper side of the auxiliary locking lever (41), and a micro switch (2) is placed at a predetermined position in the lock case (2) corresponding to the rotation range of the working pin (46). 47), and when the auxiliary locking lever (41) reaches the turning position corresponding to the locked state shown in FIG. 1, the micro switch (4
Push the actuator (47a) of 7) with the action pin (46),
The ON signal of the micro switch (47) can be transmitted to the central control panel or the like provided in the room through the lead wire (48).

The electric locking / unlocking mechanism (C) is a plunger (51) that is stable in two positions, an advanced position and a retracted position, due to the attraction action of a permanent magnet.
, A bistable latching solenoid (50) that can be switched and displaced by instantaneous energization, and a lock case
It is composed of a transmission lever (53) which is pivotally supported by a pivot shaft (52) fixed to (2). A fork member (54) having a connecting pin (55) mounted horizontally between the forked pieces (54a) and (54a) is fixed to the plunger (51) by tightening. The transmission lever (53) has one branch arm (53a).
By engaging the engaging hole (53c) formed in the fork with the connecting pin (55) of the fork member (54), the linking with the plunger (51) is achieved, while the other branch arm (53b) is provided. The provided action pin (56) is engaged with the engagement hole (41b) formed in the upper side of the auxiliary locking lever (41). The solenoid (50) can be energized by a switch operation from the central control panel, etc. via the lead wire (57), and the transmission lever can be moved by the plunger (51) 's advancing and retracting movements accompanying the instantaneous energization. (53) swings counterclockwise and clockwise, and the locking member (locking lever (40),
The auxiliary locking lever (41) is adapted to shift to an unlocked position and a locked position.

The manual locking / unlocking mechanism (D) has an engaging hole (60a) formed at the front end for loosely fitting the action pin (56) provided on the branch arm (53b) of the transmission lever (53), while the rear upper edge is formed. The rack (60b) is formed on the lock case (2), and the slider (60) is installed in the lock case (2) to move back and forth
And a return spring member (61) for urging the slider (60) from the advanced position to the intermediate neutral position side and from the retracted position to the neutral position side, and a cylinder or thumb turn pivotally attached to the lock case (2). Engagement hole for engaging the operation bar (62) of
And a pinion (63) having (63a) and meshing with the rack (60b) of the slider (60).

To move the slider (60) forward and backward, engage the guide pins (66) and (67) provided on the slider (60) with the horizontally long guide holes (64) and (65) formed in the lock case (2). I will guide you by inserting it. The return spring member (61) is provided with a pair of floating bars (6) having an S-shape in general so as to be movable in the same direction as the slider (60) with respect to the lock case (2).
8), (69), the front vertical piece (68a) of one floating bar (68) and the rear vertical piece (69b) of the other floating bar (69) are connected to each other, these floating bars (68), It is composed of a tension coil spring (70) for urging the elements (69) toward each other. The floating bars (68), (69)
It has engaging pieces (68c) and (69c) that engage from the front and rear by the action pin (71) protruding from the rear side surface of the slider (60), and the action pin (71) is associated with the forward movement of the slider (60). The engaging piece (68c) is pushed by and the floating bar (6
On the other hand, as the slider (60) moves backward, the engaging pin (71) pushes the engaging piece (69c) so that the floating bar (69) follows the coil spring (70). ing. The forward / backward movement of each floating bar (68), (69) depends on these front vertical pieces (68a),
(69a) and the rear vertical piece (68b), a guide piece (not shown) formed on the side edge of (69b), horizontally elongated guide holes (72), (73), (74) formed in the lock case (2), The guide is provided by engaging with (75) respectively. In the state shown in FIG. 1 where the manual locking / unlocking mechanism (D) is not operated by the cylinder or thumb turn, the slider (60) has an intermediate position where the engagement hole (60a) does not interfere with the action pin (56) of the transmission lever (53). The working pin (71) and the engaging pieces (68c), (69c) are arranged so as to settle down in the position. A sufficient play in the forward / backward direction of the engaging hole (60a) of the slider (60) with respect to the action pin (56) of the transmission lever (53) is provided, and when the locking / unlocking operation by the electric locking / unlocking mechanism (C) is performed,
The working pin (56) does not interfere with the slider (60). In this embodiment, the linkage of the slider (60) to the locking member (locking lever (40), auxiliary locking lever (41)) is
Although this is done via the action pin (46) of the transmission lever (53), in addition to this, for example, an action pin in which the engagement hole (60a) of the slider (60) is loosely fitted to the auxiliary locking lever (41) is separately provided. It may be provided.

Incidentally, (80) is a reed switch provided at a predetermined position close to the front surface (3) of the lock case (2), and this is a predetermined position inside the door receiving member (81) in the closed state. It is operated by the action of the magnet (82) provided, the signal is transmitted to the central control panel in the room through the lead wire (83), and the open / closed state of the door can be confirmed by a lamp display or the like.

Reference numeral (84) is a light source such as a light emitting diode provided in the lock case (2), and the light is projected to the front side and the back side of the door through a condenser lens and a cylindrical shade (85). Lighting control of this light source (84), for example, this light source (84) from the central control panel
Micro switch (47) in the middle of the power supply line that supplies power to
By connecting so that it lights up when the action pin (46) of the auxiliary lock lever (41) pushes the actuator (47a), the light source (84) can be used to check the lock before going to bed. It can be done indirectly by checking the lighting.

In addition, a buzzer is attached inside the lock case (2), and a micro switch that is turned on by, for example, the advancing operation of the slider (60) of the manual locking / unlocking mechanism (D) is separately provided. The buzzer may be configured to ring.

(Operation) The operation of this embodiment will be described separately for (1) locking / unlocking by the manual locking / unlocking mechanism (D) and (2) locking / unlocking by the electric locking / unlocking mechanism (C).

Locking / unlocking by the manual locking / unlocking mechanism (D) (a) When changing from the unlocked state to the locked state Fig. 2 shows that the latch (1) tip projection amount is (L ₁ ) in the open state. This state is hereinafter referred to as a latch state. In this case, the locking member (B) is not engaged (locked) with the engagement receiving portion (1a) of the latch (1), and the engagement portion (40a) of the locking lever (40) is of the latch (1). The front end portion (41a) of the auxiliary locking lever (41) is located rearward of the engagement receiving portion (1a) of the latch (1), being close to or in contact with the upper surface portion (1c). Also, the rear vertical piece (32b) of the trigger (6)
Is separated from the lower branch arm (27b) of the latch limiting lever (29), and its receiving piece (29a) is engaged with the locking piece (31) fixed to the latch (1), The protruding length of the tip of the latch (1) is (L ₁ ) as described above.

In this latched state, the rotation operation of the manual locking / unlocking mechanism (D), that is, the operation bar connected to the cylinder or thumb turn
When the door (62) is rotated clockwise as shown in FIG. 3 and then the door is closed as shown in FIG. 4, the locking lever (40) of the locking member (B) is released.
The engaging portion (40a) of the is locked to the engaging receiving portion (1a) of the latch (1),
The latch (1) is prevented from retracting and is automatically locked.

That is, from the latched state of FIG. 2 with the door open,
Thumb bar (or cylinder) operation bar as shown in Fig. 3.
Rotate (62) clockwise as shown to rotate the pinion (63).
The slider (60) slides in the protruding (advancing) direction of the latch (1) via the. Thereby, the action pin of the transmission lever (53)
(56) Push the (56) at the rear end of the engaging hole (60a) of the slider (60) to rotate the transmission lever (53) in the clockwise direction, and at the same time, to assist it through the action pin (56). Locking lever (41)
Rotates counterclockwise around the pivot (42) as a pivot, and the locking lever (40) rotates counterclockwise around the pivot (42) by the biasing force of the torsion spring (45). The engaging portion (40a) contacts the upper surface portion (1c) of the latch (1). In this case as well, the protruding length of the latch (1) is the length of (L ₁ ) as in FIG.

When the door is closed from the state of FIG. 3 as shown in FIG. 4,
The trigger (6) is pushed by the door receiving member (81) in the lock case (2) toward the rear (immersion) direction, and the rear vertical piece (32b) is pushed into the double-ended lever (2).
The branch arm (27b) of 7) is pushed to release the engagement of the receiving piece (29a) of the latch limiting lever (29) with the locking piece (31) fixed to the latch (1). Thereby, the latch (1) has springs (10), (15).
The maximum allowable length (L ₂ ) is projected in the forward (advance) direction by the biasing force of. Due to the protrusion of the maximum allowable length (L ₂ ) of the latch (1), the engaging portion (40a) of the locking lever (40) that has been in contact with the upper surface portion (1c) of the latch (1) until now is latched ( Engagement receiving part of 1)
It engages with (1a), prevents the latch (1) from retreating, and is locked (fully locked). At this time, the plunger (51) of the bistable latching solenoid (50) displaced to the retracted position by the clockwise rotation of the transmission lever (53) is the permanent magnet in the bistable latching solenoid (50). Is maintained in this retracted position by the action of. Therefore, the turning operation exerted on the pinion (63) from the outside is released, the floating bar (68) is retracted by the action of the tension coil spring (70) and returns to the original position, and the engaging piece (68c )
Even if the action pin (71) is pushed with the slider (60) returned to the original neutral position, the locking member (B) (locking lever (40) and auxiliary locking lever (41)) is shown in FIG. It is kept in a locked (fully locked) state.

(B) When changing from the locked state to the unlocked state In the locked state shown in FIG. 4, when the pinion (63) is rotated counterclockwise by operating the cylinder or thumb turn, as shown in FIG. 1 until then. The slider (60) in the neutral position, that is, the intermediate position moves backward as shown in FIG. With this movement, the engaging hole (60
The action pin (56) of the transmission lever (53) is pushed at the left end of a), and the transmission lever (53) rotates counterclockwise. Thereby, the auxiliary locking lever (41) in which the action pin (56) is engaged with the engagement hole (41b) is rotated clockwise, and
The locking lever (40), which has been locked to the engagement receiving portion (1a) of the latch (1) until then, rotates clockwise together with the auxiliary locking lever (41) and retracts upward, As shown in the figure, the locked state is released to enter the unlocked state.

In the unlocked state, as shown by the phantom line in FIG.
When the door is closed and the latch (1) is inserted into the receiving hole (81a) of the door receiving member (81), the door receiving member (81) presses the trigger (6) and the catch piece (29a) of the latch limiting lever (29). ) And the locking piece (31) are disengaged (see FIG. 4), the protrusion length of the latch (1) becomes the maximum allowable length (L ₂ ) and the temporarily locked state is maintained. In this state, use the lever handle or knob to
When 6) is rotated clockwise, the upper edge of the latch hub (17) hits the catch pin (18b) of the latch actuating lever (18), and the latch actuating lever (18) causes the torsion spring (21) of the interlocking lever (22). ) And the spring (10) of the latch (1) are turned clockwise against the biasing force of the spring (10). As a result, the engaging portion of the latch actuating lever (18)
(18a) pushes the rear vertical piece (8b) of the receiving member (8) of the latch (1), the latch (1) retracts inside the lock case (2) and opens the door as shown in FIG. be able to. At this time the receiving member
The locking piece (31) of (8) is moved rearward from the rear end of the receiving piece (29a) when the latch limiting lever (29) is in the horizontal posture.

When the door opening operation is started while the knob and lever handle are held in the rotating operation state shown in Fig. 6, the trigger (6) is the door receiving member.
The pressure applied by the (81) is released, and the compression coil spring (34) pushes it to project from the front surface (3). Along with this, mounting members
The pressing of the forked lever (27) by the rear vertical piece (32b) of the (32) is released, and the forked lever (27) is rotated together with the latch limiting lever (29) in the clockwise direction to return to the sixth position. As shown in the figure, the receiving piece (29a) of the latch limiting lever (29) is restricted to the rotating position where it takes a horizontal posture.

If the knob or lever handle is released with the door fully opened, the latch lever (18) will rotate counterclockwise due to the clockwise return of the interlocking lever (22). The latching member (18a) for receiving the latch (1).
(8) The pressure on the rear vertical piece (8b) is released. Therefore, the latch (1) is pushed forward by the spring (10), but at this time, the latching piece (29a) of the latch limiting lever (29) is engaged with the locking piece of the receiving member (8).
Since the (31) hits, the engagement receiving portion (1a) of the latch (1) retracts from the engaging portion (40a) of the locking lever (40), and the protruding length of the latch (1) is (L ₁ ). It is stopped at the advanced position shown in FIG. 2 in the latched state.

The reed switch (80) which has been turned off, for example, by the magnetic action of the magnet (82) in the door receiving member (81) in the door closed state shown in FIG. 4 is turned on by the transition to the door closed state. Because of the switching, the ON signal is transmitted to the central control panel in the room through the lead wire (83), whereby the door open by an illegal intruder or the like can be known at a remote place.

When retracting the latch (1) by operating the knob or lever handle, rotate the latch hub counterclockwise in the opposite direction to the above.
When (17) is rotated, its lower edge contacts the receiving pin (19a) of the slide bar (19), the slide bar (19) retracts, and the interlocking lever (22) rotates counterclockwise. Therefore, also in this case, the latch (1) can be retracted by the latch operating lever (18).

Further, in the unlocked state of FIG. 5, the actuator (47a) is operated by the action pin (46) of the auxiliary locking lever (41) until then.
The micro switch (47), which has been held down, is thereby switched to the off state. The light source (84) is turned off by this micro switch (47). Transmission lever via connecting pin (55)
With the above operation, the plunger (51) of the bistable latching solenoid (50) that is linked with the (53) overcomes the attraction force of the permanent magnet in the bistable latching solenoid (50) and moves forward.

On the other hand, with the backward movement of the slider (60), the engaging piece (69c) of the one floating bar (69) moves the slider (60) action pin (71).
Press to move back. At this time, the other floating bar (68)
The guide holes (74) and (73) are regulated at the rear ends and stopped at their original positions. In this state, if the external rotation of the pinion (63) is released, the tension bar spring (70) acts to move the floating bar.
(69) moves forward and returns to the original position. With this,
The engaging pin (71c) of the slider (60) is pushed by the engaging piece (69c), and the engaging hole (60a) of the slider (60) has a transmission lever (60a).
It returns to the neutral position shown in FIG. 1 where it does not interfere with the action pin (56) of (53). The plunger (51) moved to the advanced position by the above-mentioned operation is then the bistable latching solenoid (50).
While it is maintained in this advanced position by the action of the permanent magnet inside,
The action pin (56) of the transmission lever (53) is kept in a position where it does not interfere with the slider (60) returned to the neutral position. Therefore,
Even after the slider (60) returns, the locking member (B) (locking lever
(40) and the auxiliary lock lever (41) are held in the unlocked state shown in FIG.

Locking / unlocking by the electric locking / unlocking mechanism (C) (a) When changing from the locked state to the unlocked state In the locked state shown in FIG. 4, for example, when unlocking by remote control from the central control panel in the room, switch operation When the bistable latching solenoid (50) is momentarily energized via the lead wire (57), the plunger (51) was kept in the retracted position by the action of the permanent magnet in the bistable latching solenoid (50). Moves to the advanced position and is also maintained at this position by the action of the permanent magnet. With the displacement of the plunger (51), the transmission lever (53) rotates counterclockwise, and the auxiliary lock lever (41) linked with the transmission lever (53) rotates clockwise, and the auxiliary lock lever (53) rotates. (41) and the locking lever (40) integrated with it are held in the unlocked state shown in FIG.

During the above operation, the slider (60) of the manual locking / unlocking mechanism (D)
Is maintained in the neutral position as shown in FIG. 7,
The engagement hole (60a) does not interfere with the action pin (56) of the transmission lever (53). With this unlocking operation, the pressing of the action pin (46) of the auxiliary locking lever (41) to the actuator (47a) of the microswitch (47) is released as compared with the case of the manual locking and unlocking mechanism (D) described above. It is the same.

In this case, excluding the state of the slider (60) and the pinion (63), for example, the protruding position of the latch (1), the locking member (B) (the locking lever (40) and the auxiliary locking lever (41)), the transmission lever (Five
3), the positions of the latch limiting lever (29) and the like are the same as in the case of the manual locking / unlocking mechanism (D) of FIG. Therefore, in this case, when the door is opened or closed, the latch (1) is retracted by rotating the operating shaft (16) of the knob or lever handle clockwise (see FIG. 6), etc. Each operation of is the same as that explained in the unlocking by the manual locking / unlocking mechanism (D).

(B) When changing from the unlocked state to the locked state When switching from the unlocked state shown in FIG. 7 to the locked state by electric operation, the bistable latching solenoid (50) is momentarily energized by a switch operation from the central control panel. By doing so, the plunger (51) may be switched from the advanced position shown in FIG. 7 to the retracted position shown in FIG. Plunger
For the backward displacement of (51), the transmission lever (53) is rotated clockwise, and the rotational displacement causes the locking member (B) (locking lever (40)
And the auxiliary locking lever (41)) integrally rotate counterclockwise to return to the original locked state. The plunger (51) is maintained in this retracted position by the action of the permanent magnet of the bistable latching solenoid (50) as in the case of the advanced position described above, so that the locked state is maintained. In this case, when the door is closed, the position of the latch limiting lever (29) is the same as that shown in FIG.

A latch operating mechanism, a locking member that engages with the latch and restricts the latch to the locked position, an electric locking / unlocking mechanism that electrically locks the locking member to the locked / unlocked state, and a lock by rotating the cylinder or thumb turn. At least a manual locking / unlocking mechanism that restricts the member to the locked / unlocked state is provided. When the bistable latching solenoid is linked to the plunger and the other end is linked to the locking member and the transmission lever moves the plunger back and forth to switch and displace the locking member between the unlocked position and the locked position, the transmission lever can be unlocked and locked. Can be set easily and reliably by pulse drive of a bistable latching solenoid, and the unlocked state is maintained. Since it is not necessary to mechanically configure a holding mechanism for resetting and a reset mechanism for resetting unlocking holding, not only the configuration is simple and the operation is accurate, but also the switching drive can be performed by instantaneous energization. It is economical because it can reduce power consumption.

(Effects of the Invention) The present invention is configured as described above, and the locking member includes a locking lever biased so that the engaging portion is not engaged with the engaging receiving portion of the latch by the spring in the latched state. , An auxiliary locking lever that is pivotally supported by the same pivot as the locking lever, is connected to a manual locking / unlocking mechanism, and is formed so that the rotation track of the front end does not engage with the engagement receiving portion of the latch. By closing the door after rotating the thumb turn of the manual locking / unlocking mechanism in the locking direction when the door is open and latched,
Since the tip of the latch is projected into the receiving hole of the door receiving member by the maximum allowable length and the engaging part of the locking lever is locked to the engaging receiving part of the latch, the thumb turn is locked in the door open state. Since it can be locked just by rotating it to the closed door,
It is not necessary to lock the door with the key or the card each time from outside when closing the door when going out, and there is a remarkable effect that the troublesomeness of the locking operation with the key or the card can be eliminated.

[Brief description of drawings]

Each of the drawings shows an embodiment of the present invention, FIG. 1 is a longitudinal sectional view, FIGS. 2 to 6 are explanatory views of operation in case of manual locking / unlocking mechanism, and FIG. 7 is in case of electric locking / unlocking mechanism. FIG. 7 is an operation explanatory diagram of FIG. (A) …… Latch operation mechanism, (B) …… Locking member, (C) …… Electric locking / unlocking mechanism, (D) …… Manual locking / unlocking mechanism, (1) …… Latch, (1a) …… Interlocking part, (1c) …… Upper surface part, (4) …… Latch retracting operation member, (5) …… Latch protrusion amount limiting member, (6)…
… Trigger, (17) …… Latch hub, (18) …… Latch actuating lever, (19) …… Slide bar, (22) …… Interlocking lever,
(27) …… Double-ended lever, (29) …… Latch limit lever, (31)
...... Locking piece, (40) ...... Locking lever, (40a) ...... Engagement part,
(41) …… Auxiliary locking lever, (50) …… Bistable latching solenoid, (53) …… Transmission lever, (60) …… Slider, (60b) …… Rack, (61) …… Return spring member , (63) ...
… Pinion, (81) …… Door receiving member.

Claims (1)

[Scope of utility model registration request] 1. A latch operating mechanism (A), a locking member (B) which engages with the latch (1) to restrict the latch (1) to a locking position, and an electric drive locks and unlocks the locking member (B). At least an electric locking / unlocking mechanism (C) for restricting the state and a manual locking / unlocking mechanism (D) for restricting the locking / unlocking state of the locking member (B) by the rotation of the cylinder or the thumb turn, the electric locking / unlocking mechanism ( C) is
A bistable latching solenoid (50) that switches and displaces the plunger (51) between an advanced stable position and a retracted stable position by momentary energization, and a bistable latching solenoid (50) at one end.
Transmission lever (53) that is linked to the plunger (51) and the other end is linked to the locking member (B) to switch the locking member (B) between the unlocked position and the locked position by the forward / backward displacement of the plunger (51). In the electric lock consisting of, the locking member (B) is urged so that the engagement portion (40a) is not engaged with the engagement receiving portion (1a) of the latch (1) by the spring (45) in the latched state. Locked lever (40) and this locking lever (4
It is pivotally supported by the same pivot shaft (42) as in (0), is connected to the manual locking / unlocking mechanism (D), and the rotation locus of the front end (41a) is latched.
It consists of an auxiliary locking lever (41) formed so as not to engage with the engagement receiving part (1a) of (1), and the thumb turn of the manual locking / unlocking mechanism (D) rotates in the locking direction when the door is open and latched. Latch by closing the door later
The tip of (1) is projected into the receiving hole (81a) of the door receiving member (81) by the maximum allowable length (L ₂ ), and the engaging portion (40a) of the locking lever (40).
An electric lock having a structure in which the latch is engaged with the engagement receiving portion (1a) of the latch (1).