JP2008082051A - Electric lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric lock capable of decreasing a cost required for introducing the electric lock for post-installation. <P>SOLUTION: Both a latch 2 fixed to a door body installed in an opening and closing manner and its frame 4 are installed to the wing tip of the door. The frame has a sub-frame 7 pushed to a first stop position by a first torsion coil spring S1 hinged to a first pin 8; a hook 5 hinged to a second pin 9 in the sub-frame 7 and pushed to a second stop position by a second torsion coil spring S2 and having a sliding surface 5a with the latch 2 sliding thereon and a linking surface 5b sliding on and contacting with the sliding surface by the latch 2, the linking surface 2b substantially perpendicular to the moving direction of the door body during locking state, freely rotating around the second pin as the support with the linking surface separated from the latch 2 as a hinged bearing when unlocking the door, and the latch 2 sliding on the linking surface separated from the linking surface, and a magnetic locking piece 6 prohibiting the rotation of the hook with an electric current applied to an electromagnetic solenoid 10 when the door is locked. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electric lock that electrically locks and unlocks a door, and more particularly to an electric lock that eliminates the need for electric wiring to a door body and improves workability when an electric lock is retrofitted to an existing door.

  Conventionally, an electric lock that can be retrofitted to an existing entrance door composed of a door main body and a door frame (door sleeve portion) has been proposed (for example, see Patent Document 1). The electric lock is provided with a drive unit for driving the lock on the door body, and the door is locked or unlocked on the door body side.

JP 2004-132159 A

  However, in an electric lock with a drive unit provided on the door body, a wiring cord must be stored in the door body, and a current-carrying metal fitting is required for wiring between the door body and the door frame. This has been a factor in raising the construction cost. Furthermore, in order to unlock the electric lock from the indoor side at the entrance, an electric lock / unlock button must be installed in the vicinity of the entrance door, which also contributes to an increase in construction cost for introduction.

  The present invention has been made to solve such a conventional problem, and it is possible to unlock the door by installing a drive unit for driving the lock on the door sleeve and manually operating the lock itself from the room. It aims at providing the electric lock which can hold down the construction cost concerning introduction by incorporating a lock mechanism in a drive part.

  An electric lock drive structure according to a first aspect of the present invention that achieves the above-described object includes a door sleeve that includes a latch fixed to a door body that can be opened and closed, and is fixed to the door sleeve. The frame includes a hook that moves freely away from the latch when unlocked, a lock piece that is locked to the latch and prevents movement of the hook when locked, and a lock piece. And a driving unit for driving.

  According to the electric lock driving structure according to the first aspect, it is possible to construct a lock structure in which the driving portion is provided on the door sleeve portion, and thus it is not necessary to wire the door main body. Therefore, the electric lock can be retrofitted without making a major modification to the existing door, and the construction cost for introduction can be suppressed.

  The electric lock drive structure according to the second aspect of the present invention includes a latch fixed to a door main body that can be opened and closed at a door sleeve, and a frame fixed to the door sleeve. The sub-frame is movably attached to the frame and is pressed to the first stop position by the first elastic body, and is movably attached to the sub-frame and is pressed to the second stop position by the second elastic body. A sliding surface on which the latch slides and a locking surface on which the latch slides and contacts the sliding surface, and the locking surface is substantially in the direction of movement of the door body when locked. A hook that is vertical, and the latching element slides on the locking surface when unlocked and the locking surface moves freely away from the locking element, and a lock piece that prevents movement of the hook when locking It is to be provided.

  According to the drive structure of the electric lock according to the second aspect, since the lock piece prevents the hook from moving during locking, the locking surface of the hook is substantially perpendicular to the movement direction of the door body. In this state, the electric lock comes into contact with the latch fixed to the door body. Also, since the lock piece enables the hook to move when unlocked, the latching surface slides away from the latch after the latch slides on the hook latching surface. It becomes locked. Furthermore, since the hook is attached to the subframe that is movably attached to the frame, when the electric lock is locked with the door open, the latch slides on the sliding surface. As the hook moves together with the subframe, the door is opened, and the locked state is maintained as it is after the door is opened.

  An electric lock driving structure according to a third aspect of the present invention includes a latch fixed to a door body provided to be openable and closable on a door sleeve, and a frame fixed to the door sleeve. The frame has a subframe pivotally attached to the first pin and pressed to the first stop position by the first elastic body, and a subframe pivotally attached to the second pin by the second elastic body. 2 has a sliding surface on which the latch slides and a latching surface on which the latch slides and abuts the sliding surface. It is substantially perpendicular to the direction of motion, and when unlocking, the latch slides on the locking surface, and the locking surface moves away from the latch and freely rotates around the second pin as a pivot point. A hook and a magnetic lock piece for energizing an electromagnetic solenoid during locking to prevent the hook from rotating are provided.

  According to the drive structure of the electric lock according to the third aspect as described above, when locking, the magnetic lock piece is energized by the electromagnetic solenoid and reliably prevents the hook from rotating. Since it abuts on a latch fixed to the door body in a state substantially perpendicular to the movement direction, the electric lock is locked. Also, when unlocked, the magnetic lock piece cuts off the energization to the electromagnetic solenoid, and the lock piece enables the hook to move. The pin is pivoted about the pivot point to separate the locking surface from the latch, so that the electric lock is unlocked. Furthermore, since the hook is attached to the sub-frame pivotally attached to the first pin with respect to the frame, the electric lock is locked by the electromagnetic solenoid while the door is opened. The latch is slid on the sliding surface and the hook is moved integrally with the sub-frame to open the door. After the door is opened, the locked state is maintained as it is.

  According to a fourth aspect of the present invention, in the electric lock driving structure according to the second aspect or the third aspect, either one of the subframe and the lock piece is moved and a lever for opening the door body is provided. When the hook is prevented from rotating by the lock piece, the sub-frame is rotated together with the hook and the lock piece by the operation of the lever so that the door body can be opened from the inside of the dwelling unit.

  According to the electric lock driving structure according to the fourth aspect, the hook can be separated from the latch by moving the subframe even when the electric lock is locked, so that the door can be opened. it can. That is, even when the electric lock is in the locked state, the subframe can be easily rotated together with the hook and the lock piece, so that the door can be easily opened from the inside of the dwelling unit. Therefore, it is not necessary to install an electric unlocking button near the door inside the dwelling unit.

  According to the electric lock of the present invention, the drive unit for driving the lock is installed on the door sleeve, and the lock mechanism that can be unlocked by manually operating the lock itself from the room can be incorporated in the drive unit. Electric wiring to the door body is unnecessary, and there is no need to install an electric unlocking button near the door inside the dwelling unit.

  In addition, according to the electric lock of the present invention, it is not necessary to install an electric wiring to the door body, and it is not necessary to install an electric unlocking button near the door inside the dwelling unit. Can be suppressed.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best mode for carrying out the invention will be described with reference to the drawings. FIG. 1 to be referred to is a view showing the electric lock of the present invention, in which (A) is a bottom view, (B) is a right side view of (A), (C) is a left side view of (A), and (D). FIG. 2 is a cross-sectional view taken along line AA in FIG. FIG. 2 is a perspective view showing an entrance door to which an electric lock is attached. FIG. 3 is an enlarged partial perspective view of the electric lock of FIG. Note that the same reference numerals denote the same elements throughout the best mode for carrying out the invention.

  As shown in FIGS. 2 and 3, the electric lock which is a preferred embodiment of the present invention is applied to an entrance door 50 which is an existing single door comprising a door main body 51 and a door sleeve 52. The door main body 51 is provided so as to be openable and closable with respect to the door sleeve 52. In the drawing, the door knob 53 is disposed at the substantially central portion on the left side of the door body 51, and a hinge (not shown) that rotatably connects the door body 51 to the door sleeve 52 is provided on the right side of the door body 51. Is arranged. Therefore, the door body 51 is opened from the doorknob 53 side on the indoor side (the front side in the figure), thereby opening the door with the fulcrum of the hinge as the rotation center.

  The electric lock 1 has a latch 2 fixed to a predetermined position of the door main body 51, in the drawing, the upper left portion when viewed from the room side, and the door sleeve 52 has a latch 2 fixed to the door main body 51. The latch mechanism 3 for fixing the door body 51 to the door sleeve 52 is provided at a position where the door body 51 can be engaged with the door sleeve 52.

  The hanging element 2 includes a U-shaped hanging element frame 21 fixed to the door body 51, and a pin 22 disposed between the two support arms 21a and 21b formed on the hanging element frame 21. Formed from. The latch 2 is also a part of a latch mechanism 3 described later.

  As shown in FIG. 1, the latch mechanism 3 is incorporated in the frame 4 fixed to the door sleeve 52. The frame 4 has a hook 5 that moves freely away from the latch 2 when the electric lock 1 is unlocked, and a hook 5 that is locked when the electric lock 1 is locked to prevent the hook 5 from moving. A lock piece 6 and a drive unit 10 for driving the lock piece 6 are provided. Here, “locking” in the specification means to stop by being involved.

  The frame 4 is movably mounted with a sub-frame 7 that is pressed to the first stop position by the first elastic body S1. For example, the subframe 7 is pivotally attached to the frame 4 by a first pin 8 so as to be movable. Here, in the specification, “pivot attachment” means to be pivotably attached. Specifically, a first pin 8 is disposed between two support arms 4 a and 4 b of the frame 4, and a subframe 7 is pivotally attached to the first pin 8. The sub-frame 7 has two support arms 7a and 7b. A second pin 9 is arranged between the two support arms 7a and 7b, and a hook 5 is pivotally attached to the second pin 9 so that the hook is connected. 5 becomes movable.

  The hook 5 has a sliding surface 5a on which the pin 22 of the retainer 2 slides and a first locking surface 5b on which the pin 22 of the retainer 2 contacts after sliding on the sliding surface 5a. is doing. In such a hook 5, the first locking surface 5 b is substantially perpendicular to the movement direction DM of the door body 51 when the electric lock 1 is locked, and the pin 22 of the latch 2 when the electric lock 1 is unlocked. Slides on the first locking surface 5b, and the first locking surface 5b is separated from the pin 22 of the retainer 2 so as to freely rotate about the second pin 9 as a pivot point. Has been. Here, in the specification, “pivot support” means that the support is pivotable. In addition, the hook 5 is formed with a second locking surface 5 c that prevents the lock piece 6, which will be described later, from rotating when the electric lock 1 is locked. The second locking surface 5c and the first locking surface 5b are distributed right and left around the second pin 9 in FIG. The hook 5 fixed by the lock piece 6 at the time of locking the electric lock rotates together with the subframe 7 around the first pin 8 as a pivot point, so that the pin 22 of the latch 2 slides on the sliding surface 5a. It is formed in an arc shape so that it can move easily.

  For example, two lock pieces 6 are pivotally attached to the first pin 8 between the support arms 7 a and 7 b of the subframe 7. When the electric lock 1 is locked in FIG. 1B, the tip 6a of the lock piece 6 is the second end of the hook 5 when the hook 5 tries to rotate counterclockwise (counterclockwise). Engage with the locking surface 5c to prevent the hook 5 from rotating. In order to lock the electric lock 1, two electromagnetic solenoids 10, 10 that are driving units corresponding to the respective lock pieces 6 are provided between the two lock pieces 6, 6. 7c and the lock piece 6 is made of a ferromagnetic material. The electromagnetic solenoid 10 is energized when the electric lock 1 is locked, and draws the lock piece 6 so that the tip 6a of the lock piece 6 engages with the second locking surface 5c of the hook 5. The lock piece 5 that is attracted to the electromagnetic solenoid 10 is a magnetic lock piece.

  Furthermore, the electric lock 1 presses the sub-frame 7 to the first stop position with the first elastic body S1. The first stop position is a position at which when the electric lock 1 is locked, the first locking surface 5b of the hook 5 rotatably attached to the subframe 7 is hooked on the pin 22 of the latch 2. Thus, the first one portion 7c of the sub-frame 7 is in contact with the one portion 4c of the frame 4 so as not to be pressed beyond that position. Specifically, as shown in FIG. 1C, a first torsion coil spring S <b> 1 that is a first elastic body is fitted so as to cover the first pin 8. One arm S1a of the first torsion coil spring S1 is fixed to one part 4c of the frame 4 and the other arm S1b is fixed to the subframe 7, so that the first torsion coil spring S1 is attached to the subframe 7. In FIG. 1C, an elastic force can be applied in the counterclockwise direction.

  Further, the hook 5 is pressed to the second stop position by the second elastic body S2. The second stop position is a position where the first locking surface 5b of the hook 5 is substantially perpendicular to the movement direction of the door body 51 when the electric lock 1 is locked. The first locking surface 5b of the hook 5 is in contact with the second one portion 7d of the subframe 7 so as not to be pressed. Specifically, as shown in FIG. 1C, a second torsion coil spring S <b> 2 that is a second elastic body is fitted so as to cover the second pin 9. One arm S2a of the second torsion coil spring S2 is fixed to the second one portion 7d of the subframe 7 and the other arm S2b is fixed to the second locking surface 5c side of the hook 5, The second torsion coil spring S2 can apply an elastic force to the hook 5 in the counterclockwise direction in FIG.

  Further, the magnetic lock piece 6 is pressed to the third stop position by the third elastic body S3. The third stop position is a position at which the tip 6a of the magnetic lock piece 6 cannot be engaged with the second locking surface 5c of the hook 5 when the electric lock 1 is unlocked. One part of the magnetic lock piece 6 comes into contact with the third one part 7e of the subframe 7 so as not to be pressed as described above. Therefore, the elastic force of the third elastic body S3 is set to such a strength that the magnetic lock piece 6 is attracted when the electromagnetic solenoid 10 is energized. Specifically, as shown in FIG. 1B, a third torsion coil spring S <b> 3 that is a third elastic body is fitted so as to cover the first pin 8. One arm S3a of the third torsion coil spring S3 is fixed to the first one portion 7c of the subframe 7 and the other arm S3b is fixed to the magnetic lock piece 6, so that the torsion coil spring S3 is magnetically locked. The elastic force can be applied to the piece 6 in the counterclockwise direction in FIG.

  The unlocking / locking operation of the electric lock 1 configured as described above will be described with reference to FIGS. 4A and 4B are diagrams showing a state where the electric lock is locked, in which FIG. 4A is a bottom view, and FIG. 4B is a cross-sectional view taken along line AA in FIG. FIGS. 5A and 5B are diagrams showing the state of the electric lock when the electric lock unlocking button is unlocked. FIG. 5A is a bottom view, and FIG. 5B is a cross-sectional view taken along line A-A in FIG. 6A and 6B are views showing a state where the electric lock is being unlocked, in which FIG. 6A is a bottom view, and FIG. 6B is a cross-sectional view taken along line A-A in FIG. 7A and 7B are diagrams showing a state in which the electric lock is being locked, in which FIG. 7A is a bottom view and FIG. 7B is a cross-sectional view taken along line AA in FIG. 8A and 8B are views showing a state where the electric lock is manually unlocked, in which FIG. 8A is a bottom view and FIG. 8B is a cross-sectional view taken along line AA in FIG.

  In addition, since it is an electric lock, if an interphone device with a parent device installed indoors and a child device outside the entrance is already installed, an electric unlocking button is provided near the child device together with the parent device itself or in the vicinity of the parent device. (Not shown) is provided. Furthermore, in FIGS. 4-8, the door main body 51 and the door sleeve part 52 are simplified for convenience.

  When the electric lock 1 is locked, as shown in FIG. 4, the subframe 7 rotates clockwise with the first torsion coil spring S1 (see FIG. 1C) with the first pin 8 as the center of rotation. Elastic force is applied so as to rotate in the clockwise direction. Further, the hook 5 is given an elastic force so as to rotate clockwise around the second pin 9 with a second torsion coil spring S2 (see FIG. 1C). Further, the magnetic lock piece 6 is attracted so as to rotate clockwise by the electromagnetic solenoid 10 around the first pin 8 so as to prevent the counterclockwise rotation by the third torsion coil spring S3. Yes.

  When the unlocking operation is performed with the electric unlocking button in order to unlock the electric lock 1 in such a state, as shown in FIG. 5, the energization to the electromagnetic solenoid 10 is cut off. The pin 8 is rotated counterclockwise by the elastic force of the third torsion coil spring S3 (see FIG. 1B) with the pin 8 as the rotation center, and moves to the third stop position. Then, when the door body 51 of the entrance door 50 is opened by operating the door knob 53, the pin 22 of the latch 2 pushes the first locking surface 5b of the hook 5 as shown in FIG. Is rotated counterclockwise against the elastic force of the second torsion coil spring S2 (see FIG. 1C). At this time, since the magnetic lock piece 6 has moved to the third stop position, the second locking surface 5c of the hook 5 does not engage with the tip portion 6a of the magnetic lock piece 6. The second pin 22 rotates the hook 5 counterclockwise while sliding on the first locking surface 5 b of the hook 5. Therefore, since the movement of the pin 22 of the latch 2 is not hindered, the entrance door 50 can be opened.

  Next, when the opened door 50 is closed, the pin 22 of the latch 2 slides on the sliding surface 5a of the hook 5 as shown in FIG. At this time, the sliding surface 5a of the hook 5 has an arc shape, the hook 5 is locked to the second one portion 7d of the subframe 7, and the pin 22 of the latch 2 is the sliding surface of the hook 5. The position in contact with 5a is on the left side of the second pin 9 which is the pivot point of the hook 5 in FIG. Therefore, since the sub-frame 7 to which the hook 5 is locked is pushed by the pin 22 of the latch 2, the counterclockwise counterclockwise resists the elastic force of the first torsion coil spring S1 (see FIG. 1C). Rotate in the direction. When the pin 22 of the retainer 2 is disengaged from the sliding surface 5a of the hook 5, the sub-frame 7 is rotated clockwise by the elastic force of the first torsion coil spring S1 (see FIG. 1C). Since it moves to the first stop position, the pin 22 of the retainer 2 can be engaged with the first locking surface 5 b of the hook 5. In addition, after the entrance door 50 is opened, the electric lock 1 keeps the electromagnetic solenoid 10 energized, so that the magnetic lock piece 6 is drawn so as to rotate clockwise around the first pin 8. It has been. Even if an attempt is made to open the entrance door 50 in this state, the tip 6a of the magnetic lock piece 6 can be engaged with the second locking surface 5c of the hook 5 as shown in FIG. 5 cannot rotate counterclockwise. Therefore, since the movement of the pin 22 of the latch 2 is hindered, the entrance door 50 cannot be opened.

  Finally, the case where the electric lock 1 of the closed entrance door 50 which is the feature of the present invention is manually unlocked from the indoor side will be described with reference to FIG. Since the front door 50 is closed, the electric lock 1 is locked and the magnetic lock piece 6 is attracted to the electromagnetic solenoid 10.

  When the subframe 7 is rotated counterclockwise against the elastic force of the first torsion coil spring S1 (see FIG. 1C) as shown in FIG. Since the first locking surface 5b of the hook 5 engaged with the tip 6a of the magnetic lock piece 6 can be separated from the pin 22 of the retainer 2, the pin 22 of the retainer 2 can be separated. Therefore, the entrance door 50 can be opened. When the magnetic lock piece 6 is rotated counterclockwise as shown in FIG. 8B, the magnetic lock piece 6 is attracted to the electromagnetic solenoid 10 while the electric lock 1 is locked. It rotates counterclockwise against the elastic force of the first torsion coil spring S1 (see FIG. 1C). Therefore, since the first locking surface 5b of the hook 5 can be separated from the pin 22 of the latch 2, the movement of the pin 22 of the latch 2 is not hindered, so the entrance door 50 is opened. can do.

  As shown in FIG. 8B, when the electric lock 1 is manually unlocked from the indoor side, the door main body 51 of the entrance door 50 is opened on either the subframe 7 or the magnetic lock piece 6. If the lever 71 or the lever 61 is provided and the hook 5 is prevented from rotating by the magnetic lock piece 6, the sub frame 7 is rotated together with the hook 5 and the magnetic lock piece 6 by the operation of the lever 71 or the lever 61. The front door 50 can be opened from the inside of the dwelling unit. Thus, by providing the lever 71 or the lever 61 on one of the sub-frame 7 and the magnetic lock piece 6, it becomes easy to rotate the sub-frame 7 together with the hook 5 and the magnetic lock piece 6.

  In such an electric lock 1, the latch mechanism 3 of the electric lock 1 is provided in the door sleeve portion 52, so that it is not necessary to wire the door main body 51. Therefore, the electric lock 1 can be retrofitted without making a major modification to the existing entrance door 50, and the construction cost for introducing the electric lock 1 can be suppressed. Further, since the electric lock 1 can be mechanically unlocked by the latch mechanism 3, it is not necessary to install an electric lock / unlock button near the front door 50 inside the dwelling unit.

  The hook 2 and the hook 5 may have any shape as long as it has a latch function. Further, although the electric lock 1 is installed at the upper part of the entrance door 50, it may be installed in the vicinity of the door knob 53 in order to make the lever 71 or the lever 61 easy to operate.

  Moreover, although the electric lock was applied to the entrance door in the above-described embodiment, it is needless to say that the door is not limited to this and may be a door installed in a doorway or a living room. Furthermore, although the single door is applied to the entrance door in the embodiment described above, the present invention is not limited to this, and a double door, a single sliding door, or a double sliding door may be used. In the case of single sliding doors and double sliding doors, the latch is only moved linearly in the direction of the frame installation surface, so that the electric lock operates in the same manner as the single door described above.

  Moreover, although the electric lock is interlocked with the intercom device in the above-described embodiment, it can be applied to a residence where no intercom device is installed.

  Although the present invention has been described so far with the specific embodiment shown in the drawings, the present invention is not limited to the specific embodiment shown in the drawings so far as long as the effects of the present invention are exhibited. It goes without saying that any known configuration can be employed.

It is explanatory drawing which shows the example of preferable embodiment in the electric lock of this invention. It is a perspective view which shows the entrance door which attached the electric lock of this invention. It is the fragmentary perspective view which expanded the electric lock of FIG. It is explanatory drawing which shows the state at the time of an electric lock locking. It is explanatory drawing which shows the state of an electric lock in case the electric lock unlocking button is unlocked. It is explanatory drawing which shows the state in the middle of an unlocking of an electric lock. It is explanatory drawing which shows the state in the middle of locking an electric lock. It is explanatory drawing which shows the state which unlocked the electric lock manually.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electric lock 2 ... Hanging clasp 4 ... Frame 5 ... Hook 5a ... Sliding surface 5b ... Locking surface 6 ... Magnetic lock piece (lock piece)
61 …… Lever 7 …… Subframe 71 …… Lever 8 …… First pin 9 …… Second pin 10 …… Electromagnetic solenoid (drive unit)
51 …… Door body 52 …… Door sleeve S1 …… First elastic body S2 …… Second elastic body

Claims (4)

The door sleeve (52) is provided with a latch (2) fixed to a door body (51) provided to be openable and closable,
The door sleeve is provided with a frame (4) to be fixed, and the frame has a hook (5) that moves freely away from the latch when unlocked, and a hook that engages with the latch when locked. An electric lock comprising: a lock piece (6) for stopping and preventing movement of the hook; and a drive unit (10) for driving the lock piece. The door sleeve (52) includes a latch (2) fixed to the door body (51) provided to be openable and closable, and a frame (4) fixed to the door sleeve.
A subframe (7) that is movably mounted on the frame and pressed against the first stop position by the first elastic body (S1), and a second elastic body (movablely mounted on the subframe ( A sliding surface (5a) that is pushed to the second stop position in S2) and that the retainer slides, and a locking surface (5b) that the retainer slides and contacts on the sliding surface The locking surface is substantially perpendicular to the movement direction of the door body when locked, and the locking element slides on the locking surface when unlocked, and the locking surface is the locking surface. An electric lock comprising a hook (5) that moves freely apart from a child and a lock piece (6) that prevents movement of the hook during locking. The door sleeve (52) includes a latch (2) fixed to the door body (51) provided to be openable and closable, and a frame (4) fixed to the door sleeve.
The frame includes a subframe (7) pivotally attached to a first pin (8) and pressed to a first stop position by a first elastic body (S1), and a second pin ( 9) is pivotally attached to the second elastic body (S2) and pressed to the second stop position, and the sliding surface (5a) on which the latch slides and the latch on the sliding surface It has a locking surface (5b) that slides and abuts, and when locked, the locking surface is substantially perpendicular to the direction of movement of the door body, and when unlocked, the latch is on the locking surface. And the hook (5) which freely moves about the second pin as a pivot, and the electromagnetic solenoid (10) is energized when locked. An electric lock comprising a magnetic lock piece (6) for preventing the rotation of the electric lock. Either one of the sub-frame and the lock piece has a lever (71, 61) for moving and opening the door body,
When the hook is prevented from rotating by the lock piece, the sub frame is rotated together with the hook and the lock piece by the operation of the lever so that the door body can be opened from the inside of the dwelling unit. The drive structure for an electric lock according to claim 2 or 3.

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