Electric lock

Abstract

To provide a technique capable of reliably preventing unauthorized unlocking caused in association with operating a doorknob.SOLUTION: An electric lock 1 includes a case 10, a latch 21, a door hook 33, a latch receiving member 70, a solenoid 50, a drive position transmission mechanism 60, and an anti-panic mechanism 80. The anti-panic mechanism 80 includes a guide member 82 that switches the latch receiving member 70 between a first position that allows the latch receiving member 70 to be displaced from a locked position to an unlocked position and a second position that does not allow the latch receiving member to be guided, and a lever 81 that operates the first position and the second position. A connection member 25 is provided between the latch 21 and the guide member 82, which is engaged with the door hook 33 in the first position to allow a rotation operation of the door knob to be transmitted to the latch 21, but is disengaged from the door hook 33 in the second position of the guide member 82 to prevent a rotation operation of the door knob from being transmitted.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to an electric lock.

Background Art

[0002] Conventionally, an electric lock that locks and unlocks by switching energization and de-energization of a solenoid is known. Some electric locks of this type have an anti-panic function (anti-panic mechanism section) that allows unlocking by operating a doorknob without electrically unlocking in the locked state.

[0003] For example, Patent Document 1 discloses an electric lock having an anti-panic mechanism section (second switching mechanism). This anti-panic mechanism section connects between a second switching member and an unlocking member with a plurality of members (intermediate member, first auxiliary member, second auxiliary member), and rotates the unlocking member to an appropriate rotational position based on the position of the second switching member. Then, the electric lock switches between a state where it can be unlocked by operating the doorknob and a state where it cannot be unlocked by operating the doorknob by regulating or allowing the operation of a latch hub plate that operates a latch based on the rotational position of the unlocking member.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, even when the electric lock is in a state where it cannot be unlocked by operating the doorknob, if an illegal unlocking such as forcibly operating the doorknob is performed, there is a possibility that the internal parts will be damaged and the lock will be unlocked.

[0006] The present disclosure provides a technique that can surely prevent illegal unlocking associated with the operation of a doorknob.

Means for Solving the Problem

[0007] According to one aspect of the present disclosure, there is provided an electric lock including: a case; a latch that can move forward and backward relative to the case; a hook provided to be engageable with the latch and configured to move the latch in response to a rotational operation of a doorknob; a latch receiving member displaceable between a locked position that restricts backward movement of the latch and an unlocked position that allows backward movement of the latch; a drive source that switches a drive position by energization and non-energization; a drive position transmission mechanism unit that transmits the drive position of the drive source to the latch receiving member to switch between the locked position and the unlocked position; and an anti-panic mechanism unit provided separately from the drive position transmission mechanism unit and configured to move the latch receiving member from the locked position to the unlocked position without depending on the drive of the drive source. The anti-panic mechanism unit includes a guide member that can switch between a first posture in which the guide member can guide the latch receiving member so that the latch receiving member is displaced from the locked position to the unlocked position and a second posture in which the guide member cannot guide the latch receiving member, and a lever that operates the first posture and the second posture of the guide member. A connection member is provided between the latch and the guide member. In the first posture of the guide member, the connection member can transmit a rotational operation of the doorknob to the latch by engaging with the hook, while in the second posture of the guide member, the connection member is disengaged from the hook to make it impossible to transmit the rotational operation of the doorknob.

Advantages of the Invention

[0008] According to one aspect, it is possible to reliably prevent unauthorized unlocking associated with an operation of a doorknob.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments for carrying out the present disclosure will be described with reference to the drawings. In each drawing, the same reference numerals are assigned to the same components, and redundant descriptions may be omitted.

[0011] First, with reference to FIGS. 1 to 3, the basic configuration and operation of the electric lock 1 according to the embodiment will be described. FIG. 1 is a side cross-sectional view schematically showing the locked state of the electric lock 1 according to the embodiment. FIG. 2 is a side cross-sectional view schematically showing the unlocked state of the electric lock 1 in FIG. 1 and the case where the doorknob is not rotated. FIG. 3 is a side cross-sectional view schematically showing the unlocked state of the electric lock 1 in FIG. 1 and the case where the doorknob is rotated.

[0012] In the following description, based on the notations of the arrow directions shown in FIGS. 1 to 3, the width direction (the moving direction of the latch 21) of the electric lock 1 is also referred to as the X-axis direction, the thickness direction (the depth direction) of the electric lock 1 is also referred to as the Y-axis direction, and the vertical direction of the electric lock 1 is also referred to as the Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are mutually orthogonal. Also, the positive X-axis direction is the direction in which the latch 21 protrudes from the case 10, and the negative X-axis direction is the direction in which the latch 21 is drawn into the case 10. The positive Y-axis direction is the direction toward the back side of the paper surface of FIG. 1, and the negative Y-axis direction is the direction toward the front side of the paper surface of FIG. 1. The positive Z-axis direction is the direction toward the upper side in the vertical direction (the upper side of the paper surface), and the negative Z-axis direction is the direction toward the lower side in the vertical direction (the lower side of the paper surface).

[0013] The electric lock 1 according to the embodiment includes a case 10, a latch mechanism portion 20, a doorknob mechanism portion 30, a physical locking mechanism portion 40, a solenoid 50, a drive position transmission mechanism portion 60, a latch receiving member 70, an anti-panic mechanism portion 80, and a control panel 90.

[0014] The case 10 is formed in a rectangular parallelepiped (box shape) with a small thickness in the Y-axis direction and is housed inside the door 2. Specifically, the case 10 is formed in a rectangular shape having a first long side 10a in the positive X-axis direction, a second long side 10b in the negative X-axis direction, a first short side 10c in the positive Z-axis direction, and a second short side 10d in the negative Z-axis direction in a side cross-sectional view perpendicular to the thickness direction of the door 2 (see FIG. 1). Further, the case 10 has a pair of case plates 10e inside the first long side 10a, the second long side 10b, the first short side 10c, and the second short side 10d (in FIGS. 1 to 3, the case plate 10e on the negative Y-axis side of the pair of case plates 10e is omitted). The case 10 can be configured to be dividable into two recessed members, for example, at an intermediate position in the thickness direction.

[0015] Furthermore, the electric lock 1 includes a mounting plate 11 for mounting the case 10 on the door side wall 2w which is the side of the door 2 in the positive X-axis direction. The mounting plate 11 is fixed to the positive X-axis side of the first long side 10a of the case 10 using appropriate fixing means (such as screwing, welding, etc.).

[0016] Each of the first long side 10a of the case 10, the mounting plate 11, and the door side wall 2w has a common opening 12 through which the latch 21 of the latch mechanism portion 20 is inserted so as to be able to move forward and backward.

[0017] The latch mechanism portion 20 includes a latch 21 that moves forward and backward relative to the case 10, the mounting plate 11, and the door side wall 2w. The latch mechanism portion 20 also includes a latch plate 22 attached to the latch 21, a coil spring 23 attached to the latch 21, and a pair of connecting members 25 connected to the latch plate 22.

[0018] The latch 21 is installed so as to be movable (forward and backward) along the X-axis direction at a substantially middle position in the vertical direction (Z-axis direction) of the case 10. The latch 21 is biased in the positive X-axis direction by the coil spring 23 and protrudes from the door side wall 2w in a standby state where the door knob is not rotated. The latch 21 has a block portion 211 provided on the positive X-axis side and a shaft portion 212 extending from the block portion 211 in the negative X-axis direction.

[0019] The block portion 211 is formed in a rectangular shape in a side view and is a solid portion having a thickness in the Y-axis direction. The block portion 211 is located in the positive X-axis direction with respect to the door side wall 2w in the standby state. When the door 2 closes the door frame of the room (not shown) (in the closed state of the door 2), the standby block portion 211 is received in a hole provided in the door frame. When the door 2 is open with respect to the door frame (in the open state of the door 2), the standby block portion 211 is exposed outside the door 2.

[0020] In a plan sectional view of the electric lock 1, the surface (not shown) of the block portion 211 in the positive Y-axis direction extends linearly along the X-axis direction. On the other hand, the surface 211s of the block portion 211 in the negative Y-axis direction extends obliquely in the X-axis direction. Thus, when closing the open door 2 in the negative Y-axis direction, when the surface 211s hits the door frame of the room, the latch 21 (block portion 211) is retracted in the negative X-axis direction along the surface 211s. When the block portion 211 enters the hole portion, the latch 21 moves in the positive X-axis direction and returns to the standby state. On the other hand, when pulling the closed door 2 in the positive Y-axis direction without turning the doorknob, the surface of the block portion 211 in the positive Y-axis direction in the standby state hits the surface of the hole portion of the frame, restricting the opening of the door 2.

[0021] The shaft portion 212 is formed in a solid round bar shape and is connected to the end face 211e of the block portion 211 in the negative X-axis direction. The shaft portion 212 passes through a support piece 13 connected to the case plate 10e of the case 10 and is slidably supported in the X-axis direction by the support piece 13. Near the extended end portion of the shaft portion 212 in the negative X-axis direction, a latch pin 213 is mounted. The latch pin 213 protrudes from the shaft portion 212 toward the latch plate 22 side (positive Y-axis side) and is inserted into the guide elongated hole 222 of the latch plate 22.

[0022] On the outer peripheral surface of the shaft portion 212 near the block portion 211 (positive X-axis side), a coil spring 23 is mounted. One end of the coil spring 23 contacts the end face 211e of the block portion 211 in the negative X-axis direction, and the other end of the coil spring 23 contacts the seating surface of the support piece 13. The coil spring 23 elastically presses the block portion 211 from the seating surface of the support piece 13 in the positive X-axis direction. By this coil spring 23, the latch 21 is constantly biased in the positive X-axis direction within the case 10.

[0023] The latch plate 22 of the latch mechanism portion 20 overlaps with the extending end portion on the negative X-axis side of the shaft portion 212. The latch plate 22 is arranged adjacent to the shaft portion 212 in the Y-axis direction. This latch plate 22 can pull the latch 21 in the negative X-axis direction and can slide the latch 21 independently. Note that the latch plate 22 may be configured as a member integrated with the latch 21. Specifically, the latch plate 22 has a plate body 221, a guide long hole 222 penetrating the plate body 221 in the thickness direction (Y-axis direction), a pair of support pins 223 and a pair of guide convex portions 225 connected to the plate body 221.

[0024] The plate body 221 extends in the negative X-axis direction from the position overlapping the shaft portion 212 and extends short on both sides (upper side and lower side) in the Z-axis direction with the shaft portion 212 as a base point. The thickness of the plate body 221 is smaller than the diameter of the shaft portion 212. The plate body 221 forms a guide long hole 222 at an intermediate position in the Z-axis direction.

[0025] The guide long hole 222 extends long in the X-axis direction within the plate body 221. When the latch 21 is in the standby state, the latch pin 213 is arranged at the end portion in the positive X-axis direction of the guide long hole 222. When the latch 21 moves backward relative to the latch plate 22 (when moving in the negative X-axis direction), the latch pin 213 moves toward the end portion in the negative X-axis direction within the guide long hole 222. The case where the latch 21 moves backward relative to the latch plate 22 is, for example, when the latch 21 is pushed inward by the door frame.

[0026] The pair of support pins 223 are formed above the guide long hole 222 in the Z-axis direction and protrude from the plate body 221 to both sides in the Y-axis direction (the front side of the paper surface in FIG. 1). A pair of guide members 82 of the anti-panic mechanism portion 80 described later are rotatably mounted on each support pin 223.

[0027] A pair of guide convex portions 225 are provided near the side edges of the plate body 221 in the negative X-axis direction, and protrude on both sides in the Y-axis direction. Each guide convex portion 225 is formed in an elongated and flat elliptical shape in the Z-axis direction. Each guide convex portion 225 is respectively inserted into the connection long holes 254 of the respective connection members 25 that overlap on the outer side in the Y-axis direction. In the inserted state into the connection long holes 254, each guide convex portion 225 guides the displacement of the connection member 25 in the Z-axis direction (vertical direction).

[0028] A pair of connection members 25 are formed in a plate shape and are respectively provided on both sides in the Y-axis direction with the latch plate 22 interposed therebetween. The connection member 25 on the negative Y-axis side enables connection between the door knob mechanism portion 30 and the latch mechanism portion 20 on the same negative Y-axis side. The connection member 25 on the positive Y-axis side enables connection between the door knob mechanism portion 30 and the latch mechanism portion 20 on the same positive Y-axis side. Each connection member 25 includes a main plate 251, a hook receiving portion 252 protruding from the main plate 251, a connection pin 253 connected to the guide member 82 on the same side, and a connection long hole 254 extending in the Z-axis direction.

[0029] The main plate 251 is arranged to be sandwiched between the latch plate 22 and the door hook 33 of the door knob mechanism portion 30 described later in the Y-axis direction. The main plate 251 is slidable in the X-axis direction and the Z-axis direction. The main plate 251 has a Z-axis piece portion (not shown) protruding in the positive Z-axis direction and an X-axis piece portion (not shown) protruding in the positive X-axis direction in order to realize stable sliding.

[0030] The hook receiving portion 252 is provided at a substantially central portion of the main plate 251 and protrudes to the outside in the Y-axis direction, which is the opposite side of the latch plate 22. The hook receiving portion 252 is hooked by the door hook 33 of the door knob mechanism portion 30, and the protruding end thereof is inserted into the guide groove 14 of the case plate 10e. The guide groove 14 extends in the X-axis direction and guides the sliding of the hook receiving portion 252 (connection member 25) in the X-axis direction. The hook receiving portion 252 is formed in an elongated and flat triangular shape in the X-axis direction and has an arc shape on the side in contact with the door hook 33.

[0031] The connection pin 253 is provided on the Z-axis piece part of the main plate 251 and protrudes outward in the Y-axis direction. The connection pin 253 is inserted into a round hole (not shown) provided in the guide member 82 of the anti-panic mechanism part 80 described later. By the engagement of the connection pin 253 and the guide member 82, the connection member 25 follows the displacement of the guide member 82.

[0032] The connection long hole 254 is formed on the negative X-axis side of the main plate 251 and extends linearly along the Z-axis direction. The guide convex part 225 of the latch plate 22 described above is inserted into this connection long hole 254. The length of the connection long hole 254 in the Z-axis direction is set to be about twice the length of the guide convex part 225 in the Z-axis direction. The main plate 251 having this connection long hole 254 is displaced in the Z-axis direction by the guide of the guide convex part 225. That is, due to the structure of the connection long hole 254 and the guide convex part 225, the connection member 25 is slidable relative to the latch plate 22 in the Z-axis direction, while being slidable integrally with the latch plate 22 in the X-axis direction. The operation of this connection member 25 is also related to the operation of the anti-panic mechanism part 80, and will be described in detail later.

[0033] Next, the pair of doorknob mechanism parts 30 of the electric lock 1 are provided below the latch mechanism part 20 in the Z-axis direction. Each doorknob mechanism part 30 transmits the operating force for rotating the doorknob when the operator opens and closes the door 2 to the latch mechanism part 20. Each doorknob mechanism part 30 includes a knob body 31, a shaft support part 32 that pivotally supports the knob body 31, and a door hook 33 that rotates following the knob body 31.

[0034] The knob body 31 has door knobs (not shown) that protrude from both sides of the door 2 in the Y-axis direction. The cross-sectional part of the knob body 31 shown in FIG. 1 is a shaft part that is connected to the door knob and rotates based on the rotation operation of the door knob.

[0035] The shaft support 32 has a fitting cylinder portion 321 that fits onto the shaft portion of the knob body 31, and a housing cylinder 322 that rotatably houses the fitting cylinder portion 321. A door hook 33 is connected to the fitting cylinder portion 321. Thus, based on the rotational operation of the knob body 31 (door knob) by the operator, the door knob mechanism portion 30 relatively rotates the fitting cylinder portion 321 and the door hook 33 with respect to the housing cylinder 322.

[0036] The door hook 33 extends from the fitting cylinder portion 321 of the shaft support 32 toward the connecting member 25 of the latch mechanism portion 20 and can be hooked on the hook receiving portion 252. The protruding end of the door hook 33 in the positive Z-axis direction is formed at an acute angle, and has a linear contact side 331 on the negative X-axis direction side of this protruding end. The contact side 331 constantly contacts the hook receiving portion 252 even when the door hook 33 rotates about the shaft support 32 as a base point. Thus, the door knob mechanism portion 30 rotates clockwise in FIG. 1 by the rotational operation of the knob body 31 (door knob) by the operator, and moves the latch plate 22 and the latch 21 in the negative X-axis direction via the connecting member 25. On the other hand, when the operator releases their hand from the knob body 31, the latch 21, the latch plate 22, and the connecting member 25 move in the positive X-axis direction due to the biasing force of the coil spring 23. By receiving the moving force of the connecting member 25 in the positive X-axis direction, the door hook 33 and the knob body 31 also return to their original standby positions (circumferential positions before the rotational operation).

[0037] Also, the physical locking mechanism portion 40 of the electronic lock 1 is a mechanism portion that locks and unlocks using a physical key (not shown). The physical locking mechanism portion 40 according to the embodiment is installed in the negative X-axis direction and above the latch mechanism portion 20 (on the positive Z-axis direction side). Note that the installation position of the physical locking mechanism portion 40 of the electronic lock 1 is not particularly limited, and a configuration without the physical locking mechanism portion 40 may also be used.

[0038] The physical locking mechanism unit 40 includes a key cylinder 41 and a cam structure 42. The key cylinder 41 includes a cylinder main body 411 and a cylinder frame 412 that surrounds the cylinder main body 411 in an arc shape. The cylinder main body 411 has an insertion port (not shown) into which a physical key is inserted on the outer side of the door 2, a verification unit (not shown) that verifies the match and mismatch of the inserted physical key inside, and an engagement tooth group 411t continuously provided on the outer peripheral surface. Based on the match of the physical key in the verification unit, the cylinder main body 411 rotates relative to the cylinder frame 412, and along with this, the engagement tooth group 411t is rotated clockwise in FIG. 1.

[0039] The cam structure 42 includes a rotating plate 421, a rack 422 provided at a part in the circumferential direction of the rotating plate 421 and meshing with the engagement tooth group 411t of the key cylinder 41, and a protruding portion 423 provided at the other part in the circumferential direction of the rotating plate 421. The rotating plate 421 is rotatably supported with respect to a shaft support pin 15 connected to the case plate 10e of the case 10. A torsion spring 43 is attached to the shaft support pin 15, and this torsion spring 43 elastically biases the rotating position of the cam structure 42 to the initial position (the position where the rack 422 shown in FIG. 1 is in the positive Z-axis direction). Thereby, when the cylinder main body 411 rotates due to the physical key and the rotational force is transmitted from the engagement tooth group 411t to the rack 422, the cam structure 42 rotates. On the other hand, when the physical key is detached from the cylinder main body 411, the cam structure 42 returns to the initial position together with the cylinder main body 411 due to the biasing of the torsion spring 43.

[0040] The protruding portion 423 protrudes in the positive X-axis direction from the rotating plate 421. The protruding portion 423 is located on the positive Z-axis side of the latch receiving member 70, which is a member that restricts the movement (retreat) of the latch 21 in the negative X-axis direction when the cylinder body 411 is in the initial position. In this state, the protruding portion 423 waits at a position away from the latch receiving member 70. When the cylinder body 411 rotates by a physical key and the cam structure 42 rotates counterclockwise in FIG. 1 via the meshing tooth group 411t and the rack 422, the protruding portion 423 contacts the latch receiving member 70 and rotates the latch receiving member 70 clockwise in FIG. 1. The electric lock 1 unlocks by the rotation of the latch receiving member 70 causing the latch receiving member 70 to displace to the unlocking position parallel to the X-axis direction.

[0041] Also, the solenoid 50 and the drive position transmission mechanism portion 60 constitute a part that electrically operates the locked state and the unlocked state of the latch 21 in the electric lock 1. The solenoid 50 is disposed on the upper side (positive Z-axis side) within the case 10 and on the positive X-axis side of the physical locking mechanism portion 40. The solenoid 50 is connected to the control panel 90 via a lead wire 91 and is a drive source that operates based on the supply (energization) and cutoff (non-energization) of electric power from the control panel 90. Note that the drive source is not limited to the solenoid 50, and various devices (for example, a motor, a cylinder, etc.) that move the drive position based on electric power may be employed.

[0042] Specifically, the solenoid 50 includes a solenoid body 51 having a magnetic circuit inside, and a plunger 52 that extends inside and outside the solenoid body 51 and advances and retreats based on the magnetism of the magnetic circuit to switch the drive position. In the embodiment, the solenoid body 51 and the plunger 52 are installed in a posture parallel to the X-axis direction.

[0043] The plunger 52 protrudes from the solenoid body 51 in the negative X-axis direction. A hole 52h is provided at the protruding end of the plunger 52 in the negative X-axis direction, and the link pin 612 of the drive position transmission mechanism portion 60 is inserted into this hole 52h. Further, the solenoid 50 according to the embodiment is arranged at the first drive position where the plunger 52 protrudes in the negative X-axis direction when non-energized, while being arranged at the second drive position where the plunger 52 is drawn in the positive X-axis direction when energized. Note that FIG. 1 shows the plunger 52 located at the first drive position when the solenoid 50 is non-energized, and FIGS. 2 and 3 show the plunger 52 located at the second drive position when the solenoid 50 is energized.

[0044] The drive position transmission mechanism portion 60 is a mechanism portion that switches between restricting movement in the negative X-axis direction, which is the locked state of the latch 21, and allowing movement in the negative X-axis direction, which is the unlocked state of the latch 21, based on the drive position of the plunger 52. This drive position transmission mechanism portion 60 is configured by combining a plurality of members that transmit the drive position of the plunger 52. Specifically, the drive position transmission mechanism portion 60 includes a switching member 61 and a stay 62.

[0045] The switching member 61 is a component that is connected to the plunger 52 in the drive position transmission mechanism portion 60 and directly receives changes in the drive position of the plunger 52. The switching member 61 switches between the locked state and the unlocked state of the latch 21 by changing its inclination when the solenoid 50 is non-energized and when it is energized. This switching member 61 includes a plate body 611 extending in the Z-axis direction, a link pin 612 provided at the end of the plate body 611 on the positive Z-axis side, and a holder 614 provided at the end of the plate body 611 on the negative Z-axis side.

[0046] The plate body 611 has a bearing hole 613 at a substantially intermediate position in the Z-axis direction, and a shaft support pin 63 connected to the stay 62 is inserted into this bearing hole 613. The plate body 611 is rotatably supported by this shaft support pin 63.

[0047] When the solenoid 50 is de-energized, the plunger 52 is located at the first driving position in the negative X-axis direction, causing the plate body 611 to assume an inclined posture with respect to the Z-axis direction. Then, when the solenoid 50 is energized and the plunger 52 is drawn in and moves to the second driving position in the positive X-axis direction, the link pin 612 also moves in the positive X-axis direction (see also Fig. 2). Along with this, the switching member 61 rotates counterclockwise in Fig. 1 about the pivot pin 63, resulting in a posture substantially parallel to the Z-axis direction.

[0048] And the switching member 61 moves the holder 614 in the negative Z-axis direction in the X-axis direction based on the driving position of the plunger 52. Also, the switching member 61 and the stay 62 are connected via the pivot pin 63 as described above. The switching member 61 is configured to be able to change the position of the holder 614 in the X-axis direction separately from the driving position of the plunger 52 based on the arrangement of the stay 62 in the Z-axis direction.

[0049] The holder 614 is provided on the negative Z-axis side of the switching member 61 and holds the driving-side magnet 615. This is to form a magnetic field between the driving-side magnet 615 and the passive-side magnet 715 of the latch receiving member 70 described later. Specifically, the holder 614 has the driving-side magnet 615 at a position protruding in the negative Z-axis direction at the center of the lower end of the connecting portion connected to the plate body 611. The holder 614 is formed of, for example, a resin material. Note that the holder 614 may be formed of an appropriate yoke material to limit the magnetic field of the driving-side magnet 615 downward. Thereby, when the driving-side magnet 615 tilts with respect to the passive-side magnet 715 as the switching member 61 rotates, it is possible to limit the influence of the magnetism of the driving-side magnet 615 on the passive-side magnet 715.

[0050] The above-described switching member 61 switches the position of the drive-side magnet 615 by changing the position of the inclination with the stay 62. By switching this position, the drive position transmission mechanism 60 switches between an energized unlocking pattern in which the solenoid 50 is in a locked state when it is not energized and in an unlocked state when it is energized, and an energized locking pattern in which the solenoid 50 is in an unlocked state when it is not energized and in a locked state when it is energized. Note that Figs. 1 to 3 show the energized unlocking pattern.

[0051] Stay 62 is composed of a plate body 621 formed in a crank shape. Plate body 621 has one end 622 that protrudes elongatedly on the X-axis positive direction side, and has a concave connecting portion 623 at the other end on the X-axis negative direction side and Z-axis positive direction side. One end 622 in the X-axis positive direction of stay 62 engages with state operation plate 111 (state operation member) attached to first long side 10a of case 10.

[0052] FIG. 4(A) is a perspective view showing a state in which the state operation plate 111 is attached to the case 10. FIG. 4(B) is a perspective view showing an engagement state between the stay 62 and the state operation plate 111. As shown in FIG. 4(A), the state operation plate 111 is formed as a rectangular flat plate and is accommodated in an arrangement hole 11h provided in the mounting plate 11 above the latch 21 (Z-axis positive direction side). The state operation plate 111 is removably attached to the first long side 10a of the case 10 by an attachment means (screw fastening, etc.) not shown. Therefore, the administrator of the electric lock 1 can operate the drive position transmission mechanism 60 and the anti-panic mechanism 80 from outside the case 10 by removing the state operation plate 111.

[0053] 1 and 4(B), in the attached state, the positive X-axis direction side of the status operation plate 111 faces the communication hole 2h of the door side wall 2w, while the negative X-axis direction side of the status operation plate 111 faces the inside of the case 10 through the window 10aw of the first long side 10a. The status operation plate 111 has a protrusion 112 that protrudes slightly in the negative X-axis direction on its surface on the negative X-axis side.

[0054] The convex portion 112 can hook the stay 62 of the drive position transmission mechanism portion 60 and the lever 81 of the anti-panic mechanism portion 80 to maintain their positions. When the stay 62 is hooked on the upper surface of the convex portion 112, the inclination of the stay 62 is changed. For example, the stay 62 can be switched between a posture substantially parallel to the Z-axis direction and a posture inclined with respect to the Z-axis direction for the extending portion on the negative X-axis side having the concave connecting portion 623.

[0055] Returning to FIG. 1, the concave connecting portion 623 of the stay 62 constitutes a portion that is rotatably connected to the pivot pin 63. The concave connecting portion 623 is formed in a U-shape by notching the upper end of the plate body 621, and the pivot pin 63 is accommodated from the open portion at the upper end.

[0056] One end of the pivot pin 63 in the negative Y-axis direction is inserted into the bearing hole 613 of the switching member 61, while one end of the pivot pin 63 in the positive Y-axis direction is inserted into the guide groove 17 formed in the case plate 10e of the case 10. The guide groove 17 presents a slightly long hole along the X-axis direction. Based on the arrangement of the stay 62, the pivot pin 63 moves within this guide groove 17. The intermediate position of the switching member 61 in the Z-axis direction can move in the X-axis direction as the pivot pin 63 moves within the guide groove 17. Thereby, the position of the holder 614 (drive-side magnet 615) of the switching member 61 changes.

[0057] On the other hand, the latch receiving member 70 is a plate-shaped component and is installed in the case 10 so as to extend generally in the X-axis direction. The latch receiving member 70 is installed so as to be switchable (displaceable) between a position inclined with respect to the X-axis direction as shown in FIG. 1 and a position parallel to the X-axis direction as shown in FIG. 2. And the latch receiving member 70 restricts the movement of the latch 21 in the negative X-axis direction in the inclined position to set it in the locked state (hereinafter, the inclined position is also referred to as the locked position). On the other hand, the latch receiving member 70 allows the movement of the latch 21 in the negative X-axis direction in the position parallel to the X-axis direction to set it in the unlocked state (hereinafter, the parallel position is also referred to as the unlocked position).

[0058] Specifically, the latch receiving member 70 includes a plate body 71, a guide pin 72 provided in the negative X-axis direction of the plate body 71, and a torsion spring 73 that elastically supports the plate body 71.

[0059] The plate body 71 extends relatively long in the X-axis direction (for example, longer than the axial length of the shaft portion 212 of the latch 21). The plate body 71 has a bearing hole 71h at a substantially intermediate position in the X-axis direction. A support pin 18 connected to the case plate 10e of the case 10 is inserted into the bearing hole 71h. The plate body 71 is rotatably supported by the support pin 18. Further, the torsion spring 73 is attached to the support pin 18 and one end thereof is fixed to the support piece 13. Thereby, the torsion spring 73 elastically supports the positive X-axis side of the latch receiving member 70 supported by the support pin 19.

[0060] On the positive X-axis side of the bearing hole 71h in the plate body 71, the upper side is inclined to form a tapered first end portion 711. At the locking position of the latch receiving member 70, the end face of the first end portion 711 can contact the end face 211e on the negative X-axis side of the block portion 211 (latch 21). The latch receiving member 70 restricts the movement of the block portion 211 (that is, the latch 21) in the negative X-axis direction by this first end portion 711.

[0061] A second end portion 712 is provided at a position opposite to the first end portion 711 with the support pin 18 interposed therebetween. The second end portion 712 has two arc portions, and the guide pin 72 is provided on the arc portion on the negative Z-axis side. The guide pin 72 protrudes on both sides in the Y-axis direction with the plate body 71 as a base point. Further, the second end portion 712 has an arc portion on the positive Z-axis side as a convex piece 713. This convex piece 713 is configured to be able to contact the protruding portion 423 of the physical locking mechanism portion 40 (cam structure 42). That is, the electric lock 1 can switch the latch receiving member 70 at the locking position to the unlocking position by pressing the convex piece 713 downward by the protruding portion 423 of the cam structure 42.

[0062] Also, at an intermediate position of the plate body 71 (slightly on the negative X-axis side from the bearing hole 71h) and on the upper side (the side on the positive Z-axis side), a passive-side magnet 715 capable of forming a magnetic field with the drive-side magnet 615 of the drive position transmission mechanism portion 60 described above is provided. This passive-side magnet 715 extends a predetermined length in the X-axis direction (the extending direction of the latch receiving member 70) at the intermediate position of the plate body 71. When the drive-side magnet 615 of the drive position transmission mechanism portion 60 moves to a position close to the upper side of this passive-side magnet 715, a magnetic field is formed between the drive-side magnet 615 and the passive-side magnet 715.

[0063] The drive-side magnet 615 and the passive-side magnet 715 form a magnetic field that repels each other in a state where they are close to each other (opposite each other). That is, a repulsive force is generated between the drive-side magnet 615 and the passive-side magnet 715. The latch receiving member 70 is arranged in the locked position when not affected by this repulsive force (influence of the magnetic field), while the passive-side magnet 715 moves to the unlocked position by receiving the repulsive force (see also FIG. 2).

[0064] Furthermore, the electric lock 1 includes a locking / unlocking detection sensor 75 at a position close to the negative Z-axis side of the plate body 71. This locking / unlocking detection sensor 75 has a detector in contact with the lower side of the latch receiving member 70, and detects the locked position and the unlocked position of the latch receiving member 70. The control panel 90 can recognize the locked state and the unlocked state of the electric lock 1 by receiving the signal of the locking / unlocking detection sensor 75 via the lead wire 91.

[0065] The control panel 90 is attached to a space in the case 10 where each component is not installed. In the example of FIG. 1, the control panel 90 is attached to the positive X-axis side and the negative Z-axis side of the case 10. This control panel 90 includes a control chip 92, a switch 93 for switching the control main body, an interface 94, and an external communication unit 95.

[0066] The interface 94 is connected to each component of the electric lock 1 via a plurality of lead wires 91. Further, the interface 94 is connected to a power supply (not shown) provided outside the electric lock 1 via external wiring (not shown). For example, inside the case 10, the interface 94 is connected to an open / close detection sensor 96 that detects the opening and closing of the door 2, in addition to the solenoid 50 and the locking / unlocking detection sensor 75 described above. The open / close detection sensor 96 is installed on the first long side 10a of the case 10 and is configured to be able to detect the magnetic field of a magnet (not shown) provided on the door frame. That is, the open / close detection sensor 96 detects the opening and closing of the door 2 based on the change in the magnetic field of the magnet and transmits the information to the control panel 90.

[0067] The external communication unit 95 is communicably connected to a management unit (main control panel, not shown) that manages the opening and closing, locking, and unlocking of the door 2 via external wiring (not shown). The main control panel is a device that comprehensively controls a plurality of electric locks provided in a building or a facility, etc. However, the control panel 90 according to the embodiment is configured to be able to switch between a configuration in which locking and unlocking are performed based on a command from the management unit and a configuration in which locking and unlocking are automatically performed by the control of the control panel 90 itself. For this reason, when the switch 93 for switching the control subject is in the off state, the control panel 90 puts the control chip 92 in the sleep state and controls the solenoid 50 by the management unit. On the other hand, when the switch 93 is in the on state, the control panel 90 disconnects the management unit (or restricts communication with the management unit) and controls the solenoid 50 by the control chip 92.

[0068] The control chip 92 controls the operations of the solenoid 50 etc. by recognizing the locking / unlocking operation of the operator, the locking position / unlocking position of the latch receiving member 70, and the open state or closed state of the door 2. The control chip 92 is not particularly limited, and for example, an IC chip such as an FPGA or an ASIC can be applied. Alternatively, the control panel 90 may apply a computer having a processor, a memory, etc.

[0069] For example, when in the energized unlocking pattern, if the control chip 92 recognizes the closed state of the door 2 by the open / close detection sensor 96, it automatically de-energizes the solenoid 50 to enter the locked state that restricts the movement of the latch 21 in the negative X-axis direction. On the other hand, when the control chip 92 authenticates the unlocking operation of the operator by bringing an electronic key close to an authentication unit (not shown) of the control panel 90, it energizes the solenoid 50 to enter the unlocked state that allows the movement of the latch 21 in the negative X-axis direction.

[0070] Here, it is preferable that the electric lock 1 can shift from the locked state to the unlocked state regardless of the displacement of the electrical drive position of the solenoid 50 when power cannot be supplied to the electric lock 1 (such as during a power outage or a failure). For this reason, the electric lock 1 is equipped with an anti-panic mechanism unit 80 that can mechanically switch from the locked state to the unlocked state by rotating the doorknob. Hereinafter, the anti-panic mechanism unit 80 will be described in detail.

[0071] The anti-panic mechanism unit 80 is configured to separately switch from the locked state to the unlocked state for the rotational operations of the doorknobs provided on both sides in the Y-axis direction. For example, the anti-panic mechanism unit 80 can make it impossible to shift to the unlocked state for the doorknob on the positive Y-axis side while making it possible to shift to the unlocked state for the doorknob on the negative Y-axis side. For this reason, the anti-panic mechanism unit 80 includes a plurality of symmetric members on each of the positive Y-axis side and the negative Y-axis side with the latch plate 22 and the latch receiving member 70 sandwiched therebetween.

[0072] Specifically, the anti-panic mechanism unit 80 includes a pair of levers 81 and a pair of guide members 82. The pair of levers 81 are provided on both sides in the Y-axis direction with the latch receiving member 70 sandwiched therebetween, slightly above the latch receiving member 70 (in the positive Z-axis direction). The pair of guide members 82 are also arranged at the same positions in the Y-axis direction as the pair of levers 81, above the latch plate 22 and on both sides in the Y-axis direction with the latch plate 22 sandwiched therebetween.

[0073] Each lever 81 is, for example, a flat plate-like member that is longer and thinner than the latch receiving member 70. Each lever 81 also has a bearing hole 811 at an intermediate position in the longitudinal direction. Each lever 81 is rotatable about the bearing pin 19 by inserting the bearing pin 19 connected to the case plate 10e of the case 10 into the bearing hole 811.

[0074] One end portion 812 on the positive X-axis side of each lever 81 extends to the state operation plate 111 and can be engaged with the state operation plate 111. On the other hand, the other end portion 813 on the negative X-axis side of each lever 81 can contact each guide member 82 at the same position in the Y-axis direction.

[0075] In the first engagement state where the one end portion 812 is hooked on the upper surface of the convex portion 112, the lever 81 assumes a posture substantially parallel to the X-axis direction. Then, in the substantially parallel posture, the lever 81 can be activated to shift from the locked state to the unlocked state by the rotation operation of the doorknob because the other end portion 813 presses the guide member 82.

[0076] Conversely, in the second engagement state where the one end portion 812 is hooked on the lower surface of the convex portion 112, the lever 81 assumes an inclined posture with respect to the X-axis direction (see also Fig. 4(B)). Then, in the inclined posture, the lever 81 continues the locked state even when the doorknob is rotated, and the anti-panic function cannot be activated because the other end portion 813 moves away from the guide member 82 (see also Fig. 8(A)).

[0077] The other end portion 813 of the lever 81 has a plurality (two) of pressing convex portions 814 that press the guide member 82 on the lower side in the Z-axis direction. Each pressing convex portion 814 controls the posture of each guide member 82 by pressing each guide member 82 downward (in the negative Z-axis direction) when the lever 81 is in the first engagement state.

[0078] The pair of guide members 82 are plate-shaped members respectively attached to the support pins 223 on both sides of the latch plate 22 in the Y-axis direction. Each guide member 82 has a bearing hole 821 for accommodating the support pin 223. With the bearing hole 821 as a base point, it projects short upward in the Z-axis direction and bends toward the positive X-axis side, extending long in the positive X-axis direction. Also, each guide member 82 has an extension piece 824 extending from the bearing hole 821 toward the positive X-axis side. A round hole into which the connection pin 253 of the connection member 25 can be rotatably inserted is formed at the extending end of the extension piece 824. Further, each guide member 82 is respectively equipped with a torsion spring 83 which is an elastic member that elastically pushes out the guide member 82 so as to be in a posture away from the latch 21 (in the clockwise direction in FIG. 1).

[0079] The upper side 822 of the guide member 82 in the positive Z-axis direction extends linearly, and the pressing convex portion 814 of the lever 81 is in slidable contact therewith. On the other hand, the lower side 823 of the guide member 82 in the negative Z-axis direction is curved toward the connection portion (negative X-axis direction) with the latch plate 22, forming a guide side for guiding the guide pin 72 of the latch receiving member 70. Also, the lower side 823 has a concave portion 823a recessed toward the positive Z-axis side near the bearing hole 821 (negative X-axis side).

[0080] When the lever 81 is in the first engagement state and presses the guide member 82, the guide member 82 assumes the anti-panic on posture (first posture). In the anti-panic on posture, the lower side 823 extends parallel to the X-axis direction together with the edge of the latch plate 22, forming a guide path through which the guide pin 72 can pass therebetween. When the guide member 82 is in the anti-panic on posture, the latch receiving member 70 is in the locked position, and further when the latch 21 and the latch plate 22 are in the standby state, the guide pin 72 of the latch receiving member 70 is accommodated in the concave portion 823a.

[0081] When the latch plate 22 and the guide member 82 move integrally in the negative X-axis direction, the guide pin 72 moves in the negative Z-axis direction by coming out of the recess 823a along the lower side 823 (see also Fig. 7(B)). As a result, the latch receiving member 70 is displaced from the locked position to the unlocked position (a posture substantially parallel to the X-axis direction). That is, the guide member 82 is displaced to a position where it can guide the guide pin 72. The anti-panic mechanism unit 80 can switch the locked state of the electric lock 1 to the unlocked state.

[0082] On the other hand, when the lever 81 is in the second engaged state and separates from the guide member 82, the guide member 82 is pressed by the torsion spring 83 and assumes an anti-panic off posture (second posture) in which it is inclined (see also Fig. 8(A)). In the anti-panic off posture, the lower side 823 is inclined with respect to the edge of the latch plate 22, and the recess 823a moves away from the guide pin 72. As a result, the guide member 82 is displaced to a position where it cannot guide the guide pin 72.

[0083] Next, the operations of the electric lock 1 (the locked state, the unlocked state, and the state in which the latch 21 is retracted in the unlocked state) will be described. As shown in Fig. 1, when the control panel 90 de-energizes the solenoid 50, the electric lock 1 in the unlock-on-power pattern enters a locked state in which the movement of the latch 21 in the negative X-axis direction is restricted. Specifically, when the solenoid 50 is de-energized, the plunger 52 is arranged at a first drive position protruding in the negative X-axis direction. Due to the link pin 612 inserted into the protruding end of the plunger 52, the switching member 61 of the drive position transmission mechanism unit 60 assumes a posture inclined with respect to the Z-axis direction.

[0084] As a result, when the switching member 61 is de-energized, the holder 614 and the drive-side magnet 615 are arranged at a first separation position from the driven-side magnet 715 of the latch receiving member 70. In this state, the latch receiving member 70 is held in a locked position where its counterclockwise rotation in FIG. 1 is suppressed by a torsion spring 73 supported by the support piece 13 and is in a posture inclined with respect to the X-axis direction. In the locked position, the first end portion 711 is inclined downward (in the negative Z-axis direction) toward the positive X-axis direction. As a result, the end face of the first end portion 711 faces the end face 211e of the block portion 211 of the latch 21, reliably restricting the movement of the latch 21 in the negative X-axis direction.

[0085] Then, as shown in FIG. 2, when the electric lock 1 is in the unlocking pattern upon energization, the control panel 90 energizes the solenoid 50 to bring the electric lock 1 into an unlocked state that allows the latch 21 to move in the negative X-axis direction. Specifically, when energized, the solenoid 50 is arranged at a second drive position where the plunger 52 is drawn in the positive X-axis direction. By a link pin 612 inserted into the protruding end of the plunger 52, the switching member 61 of the drive position transmission mechanism portion 60 rotates counterclockwise in FIG. 2 about the pivot pin 63 and assumes a posture substantially parallel to the Z-axis direction.

[0086] As a result, the holder 614 and the drive-side magnet 615 of the switching member 61 are arranged at a proximity position close to the driven-side magnet 715 of the latch receiving member 70. In this state, a repulsive force is generated between the drive-side magnet 615 and the driven-side magnet 715. The repulsive force presses the driven-side magnet 715 on the negative X-axis side of the latch receiving member 70 downward in the Z-axis direction.

[0087] When the latch receiving member 70 receives the repulsive force, it rotates clockwise in FIG. 2 about the pivot pin 18 while elastically deforming the torsion spring 73. As a result, the latch receiving member 70 is arranged at an unlocked position substantially parallel to the X-axis direction. In the unlocked position of the latch receiving member 70, the end face of the first end portion 711 is not opposed to the end face 211e of the block portion 211 of the latch 21, allowing the latch 21 to move in the negative X-axis direction.

[0088] When the electric lock 1 is in the unlocked state, as shown in Fig. 3, the operator can pull the latch 21 into the case 10 by rotating the door knob. That is, in the door knob mechanism 30, when the operator rotates the door knob, the shaft portion of the knob body 31 rotates, and accordingly, the fitting cylinder portion 321 and the door hook 33 rotate clockwise. For this reason, the door hook 33 presses the hook receiving portion 252 of the connecting member 25 in the negative X-axis direction by the contact side 331.

[0089] The connecting member 25 and the latch plate 22 move in the negative X-axis direction and pull the latch pin 213 inserted into the guide long hole 222 of the latch plate 22. As a result, the latch 21 moves (recedes) in the negative X-axis direction together with the latch plate 22. The latch receiving member 70 in the unlocked state allows the latch 21 to move smoothly in the negative X-axis direction because the first end portion 711 is separated from the block portion 211 upward in the Z-axis direction. When the block portion 211 of the latch 21 is inserted into the case 10, the door 2 can be opened with respect to the door frame.

[0090] Next, the switching between the unlocking pattern and the locking pattern when energized by the drive position transmission mechanism 60 of the electric lock 1 and the operations of each pattern will be described with reference to Figs. 5 and 6. Fig. 5(A) is an explanatory diagram showing the non-energized state of the unlocking pattern when energized by the drive position transmission mechanism 60. Fig. 5(B) is an explanatory diagram showing the energized state of the unlocking pattern when energized by the drive position transmission mechanism 60. Fig. 6(A) is an explanatory diagram showing the non-energized state of the locking pattern when energized by the drive position transmission mechanism 60. Fig. 6(B) is an explanatory diagram showing the energized state of the locking pattern when energized by the drive position transmission mechanism 60.

[0091] As shown in FIG. 5(A), the drive position transmission mechanism unit 60 can execute the energization unlocking pattern by hooking one end 622 of the stay 62 on the lower surface of the convex portion 112 of the state operation plate 111. That is, according to the arrangement (first arrangement) of the one end 622 supported by the convex portion 112, the concave connecting portion 623 sets the pivot pin 63 on the positive X-axis side in the guide groove 17. The switching member 61 rotates about the pivot pin 63 set on the positive X-axis side in the guide groove 17. In this first arrangement, the switching member 61 moves (rotates) between a first separation position where it is inclined with respect to the Z-axis direction and pulls the holder 614 toward the positive X-axis side, and a proximity position where it is substantially parallel to the Z-axis direction and the holder 614 faces the lower end in the negative Z-axis direction.

[0092] And when the solenoid 50 is de-energized, it arranges the plunger 52 to project in the negative X-axis direction to the first drive position. As a result, the switching member 61 assumes a posture inclined with respect to the Z-axis direction. The holder 614 and the drive-side magnet 615 of the switching member 61 are located at the first separation position on the positive X-axis side. In this case, the passive-side magnet 715 of the latch receiving member 70 does not form a magnetic field with the drive-side magnet 615. Since the drive position transmission mechanism unit 60 does not apply a force from the drive-side magnet 615 to the latch receiving member 70, the latch receiving member 70 can maintain the locked position inclined with respect to the X-axis direction.

[0093] As shown in FIG. 5(B), when the solenoid 50 is energized, the plunger 52 is drawn in the positive X-axis direction to be arranged at the second drive position. As a result, the switching member 61 assumes a posture substantially parallel to the Z-axis direction. The holder 614 and the drive-side magnet 615 of the switching member 61 move to the negative X-axis side and are arranged at a proximity position close to the passive-side magnet 715. As a result, the drive-side magnet 615 and the passive-side magnet 715 form a magnetic field that repels each other. When energized, the drive position transmission mechanism portion 60 applies a repulsive force in the clockwise direction in FIG. 5(B) from the drive-side magnet 615 to the latch receiving member 70, rotating the latch receiving member 70 from the locked position to the unlocked position. Therefore, when the solenoid 50 is energized, the drive position transmission mechanism portion 60 can smoothly move the latch receiving member 70 to the unlocked position.

[0094] Then, as shown in FIG. 6(A), the drive position transmission mechanism portion 60 can execute the energized locking pattern by hooking one end portion 622 of the stay 62 on the upper surface of the convex portion 112 of the state operation plate 111. That is, according to the arrangement (second arrangement) of the one end portion 622 supported by the convex portion 112, the concave connecting portion 623 sets the pivot pin 63 on the negative X-axis side in the guide groove 17. The switching member 61 rotates about the pivot pin 63 set on the negative X-axis side in the guide groove 17. In this second arrangement, the switching member 61 moves (rotates) between a proximity position where it is substantially parallel to the Z-axis direction with the holder 614 facing the lower end in the negative Z-axis direction, and a second separation position where it is inclined in the negative Z-axis direction and the holder 614 is pushed out to the negative X-axis side.

[0095] When the solenoid 50 is de-energized, the plunger 52 is arranged at the first driving position, so that the switching member 61 is substantially parallel to the Z-axis direction. The holder 614 and the driving-side magnet 615 of the switching member 61 are arranged at a proximity position close to the driven-side magnet 715 by moving in the negative Z-axis direction. As a result, the driving-side magnet 615 and the driven-side magnet 715 form a magnetic field that repels each other. When the solenoid 50 is energized, the driving position transmission mechanism 60 applies a counterclockwise repulsive force from the driving-side magnet 615 to the latch receiving member 70, rotating the latch receiving member 70 from the locking position to the unlocking position. Thus, when the solenoid 50 is de-energized, the driving position transmission mechanism 60 can smoothly move the latch receiving member 70 to the unlocking position.

[0096] As shown in FIG. 6(B), when the solenoid 50 is energized, the plunger 52 is drawn in the positive X-axis direction to be arranged at the second driving position. As a result, the switching member 61 takes a posture inclined with respect to the Z-axis direction, and the holder 614 and the driving-side magnet 615 are moved to the negative X-axis side. The holder 614 and the driving-side magnet 615 are located at the second separation position on the negative X-axis side. Therefore, the driven-side magnet 715 of the latch receiving member 70 does not form a magnetic field with the driving-side magnet 615. Since the driving position transmission mechanism 60 does not apply a force from the driving-side magnet 615 to the latch receiving member 70, the latch receiving member 70 can maintain the locking position inclined with respect to the X-axis direction.

[0097] Next, the operation of the anti-panic mechanism 80 of the electric lock 1 and its relationship with the latch mechanism 20 and the doorknob mechanism 30 will be described with reference to FIGS. 7 and 8. FIG. 7(A) is an explanatory diagram showing the anti-panic on posture. FIG. 7(B) is an explanatory diagram showing the operations of the latch mechanism 20 and the doorknob mechanism 30 in the anti-panic on posture. FIG. 8(A) is an explanatory diagram showing the anti-panic off posture. FIG. 8(B) is an explanatory diagram showing the operations of the latch mechanism 20 and the doorknob mechanism 30 in the anti-panic off posture.

[0098] As shown in Fig. 7(A), in the case of the anti-panic on posture, the lever 81 of the anti-panic mechanism unit 80 presses the guide member 82 by the pressing convex portion 814 at the other end portion 813. As a result, the guide member 82 forms a guide path for guiding the guide pin 72 of the latch receiving member 70.

[0099] Also, in the anti-panic on posture, the guide member 82 pushes the connection pin 253 inserted into the round hole toward the negative Z-axis side (lower side). The connecting member 25 is guided to move in the negative Z-axis direction by the connecting long hole 254 and the guide convex portion 225, and the guide convex portion 225 is disposed above the connecting long hole 254. The connecting member 25 is disposed at the engaging position on the negative Z-axis side. The engaging position is a position where the hook receiving portion 252 of the connecting member 25 faces the door hook 33 in the X-axis direction.

[0100] As shown in Fig. 7(B), when the door knob is turned in the anti-panic on posture, the upper end of the door hook 33 moves to the negative X-axis side and is caught by the hook receiving portion 252 of the connecting member 25. When the door knob is further turned, the door hook 33 moves the connecting member 25 to the negative X-axis side. The connecting member 25 moves the latch plate 22 in the negative X-axis direction via the connecting long hole 254 and the guide convex portion 225. As a result, the latch plate 22 and the latch 21 move to the negative X-axis side. At this time, the guide pin 72 of the latch receiving member 70 moves along the lower side 823 of the guide member 82, thereby releasing the inclination of the entire latch receiving member 70 to make it substantially parallel, and enabling the latch 21 to move to the negative X-axis side. Therefore, the electric lock 1 can be unlocked by moving the latch 21 to the negative X-axis side in response to the rotation operation of the door knob.

[0101] On the other hand, as shown in Fig. 8(A), in the case of the anti-panic off posture, the pressing convex portion 814 at the other end portion 813 of the lever 81 of the anti-panic mechanism unit 80 separates from the guide member 82. As a result, the guide member 82 is inclined so that the end portion on the positive X-axis side rises by the spring force of the torsion spring 83, and the guide of the guide pin 72 of the latch receiving member 70 becomes impossible.

[0102] Also, in the anti-panic off position, the guide member 82 raises the connection pin 253 inserted into the round hole in the positive Z-axis direction (upper side). The connecting member 25 is guided to move in the positive Z-axis direction by the connecting long hole 254 and the guide convex portion 225, and the guide convex portion 225 is disposed below the connecting long hole 254. Thereby, the connecting member 25 is disposed at a non-engagement position on the positive Z-axis side. The non-engagement position is a position where the hook receiving portion 252 of the connecting member 25 does not face the door hook 33 in the X-axis direction.

[0103] As shown in FIG. 8(B), when the door knob is turned in the anti-panic off position, the upper end of the door hook 33 moves in the negative X-axis direction, but does not catch on the hook receiving portion 252 of the connecting member 25. That is, the door hook 33 idles without pushing in the connecting member 25. As a result, the latch 21 cannot be moved in the negative X-axis direction, so that even if the door knob is forcibly operated, the electric lock 1 can avoid damage to the components and maintain the locked state well.

[0104] As described above, the electric lock 1 can easily switch the engagement and non-engagement between the connecting member 25 and the door knob mechanism portion 30 by displacing the connecting member 25 that can be engaged with the door knob mechanism portion 30 according to the switching of the posture of the anti-panic mechanism portion 80. In the non-engagement state, the door hook 33 idles even if the door knob is operated. Therefore, even if the door knob is operated when the anti-panic mechanism portion 80 is inoperative, the electric lock 1 can avoid affecting the internal components and reliably maintain the locked state.

[0105] Note that the electric lock 1 of the present disclosure is not limited to the above configuration and can take various modifications. For example, the solenoid 50 according to the embodiment has a configuration in which the plunger 52 protrudes in the negative X-axis direction, but a configuration in which the plunger 52 protrudes in the positive X-axis direction or a configuration in which the plunger protrudes in the Z-axis direction may also be used. The solenoid 50 according to the embodiment draws the plunger 52 into the solenoid body 51 when energized and protrudes the plunger 52 when not energized, but the solenoid 50 may have the reverse operation (a configuration in which the plunger 52 protrudes when energized and the plunger 52 is drawn in when not energized).

[0106] Also, the configuration of the connection member 25 is not limited to the above. For example, the connection member 25 may switch between engagement and non-engagement with the door hook 33 by rotating without sliding as the posture of the guide member 82 is switched.

[0107] As described above, by having the connection member 25, the electric lock 1 can surely prevent illegal unlocking associated with the operation of the doorknob. That is, the connection member 25 can easily switch between engagement and non-engagement with the door hook 33 as the anti-panic on posture (first posture) and the anti-panic off posture (second posture) of the guide member 82 are switched. And in the engagement with the door hook 33, the connection member 25 can smoothly transmit the rotation operation of the doorknob (door hook 33) to the latch 21. On the other hand, in the non-engagement with the door hook 33, the connection member 25 does not transmit the rotation operation of the doorknob to the latch 21. Thereby, the electric lock 1 can avoid damage to internal components due to illegal unlocking and surely maintain the locked state. Also, even with a configuration in which the electric lock 1 has the anti-panic mechanism portion 80 and the connection member 25, it is possible to ensure a good accommodation space for other configurations, and it is possible to achieve miniaturization of the device and the like.

[0108] In addition, the connecting member 25 can be easily arranged at the engaging position and the non-engaging position by being displaced along with the switching of the posture of the guide member 82. Further, since the connecting member 25 has a hook receiving portion 252 that is displaced relative to the door hook 33, the door hook 33 can be smoothly moved to a position where it idles by being disengaged from the hook receiving portion 252. In particular, the position of the connecting member 25 can be appropriately defined because the displacement direction of the connecting member 25 is guided by the structure of the guide convex portion 225 and the connecting long hole 254. Further, since the connecting member 25 is displaced in a direction orthogonal to the direction in which the latch 21 moves forward and backward, it is possible to switch the engagement and disengagement between the connecting member 25 and the door hook 33 with a short movement distance.

[0109] The electric lock 1 according to the embodiment disclosed this time is illustrative in all respects and not restrictive. The embodiment can be modified and improved in various forms without departing from the scope and gist of the appended claims. The matters described in the above plurality of embodiments can also adopt other configurations and can be combined within a non-contradictory range.

Explanation of Reference Numerals

[0110] 1 Electric lock 10 Case 21 Latch 22 Latch plate 225 Guide convex portion 25 Connecting member 252 Hook receiving portion 254 Connecting long hole 33 Door hook 50 Solenoid 60 Driving position transmission mechanism portion 70 Latch receiving member 72 Guide pin 80 Anti-panic mechanism portion 81 Lever 82 Guide member 83 Torsion spring 90 Control panel 93 Switch

Claims

1. A case, a latch that can move forward and backward relative to the case, a hook provided to be engageable with the latch and configured to move the latch in response to a rotational operation of a doorknob, a latch receiving member displaceable between a locking position that restricts backward movement of the latch and an unlocking position that permits backward movement of the latch, a drive source that switches a drive position by energization and non-energization, a drive position transmission mechanism unit that transmits the drive position of the drive source to the latch receiving member to switch between the locking position and the unlocking position, an anti-panic mechanism unit provided separately from the drive position transmission mechanism unit and configured to be able to shift the latch receiving member from the locking position to the unlocking position without being driven by the drive source, and the anti-panic mechanism unit includes a guide member configured to switch between a first posture that can guide the latch receiving member so that the latch receiving member is displaced from the locking position to the unlocking position and a second posture that cannot guide the latch receiving member, and a lever that operates the first posture and the second posture of the guide member, a connecting member is provided between the latch and the guide member, and in the first posture of the guide member, the connecting member can transmit a rotational operation of the doorknob to the latch by engaging with the hook, while in the second posture of the guide member, the connecting member is disengaged from the hook to make it impossible to transmit the rotational operation of the doorknob, an electric lock.

2. The connecting member switches engagement and disengagement with the hook by being displaced in conjunction with switching between the first posture and the second posture of the guide member. The electric lock according to Claim 1.

3. The connecting member has a hook receiving portion that is displaced integrally with the guide member to a position where it catches on the hook and a position where the hook idles. The electric lock according to Claim 2.

4. The latch is connected to a latch plate having a guide convex portion that protrudes toward the connecting member, and the connecting member has a long hole that accommodates the guide convex portion and is guided by the guide convex portion in the direction of displacement. The electric lock according to Claim 2.

5. The direction in which the connecting member is displaced is a direction orthogonal to the direction in which the latch moves forward and backward. The electric lock according to Claim 2.

6. The latch receiving member has a guide pin guided by the guide member. The guide member is rotatably attached to a latch plate connected to the latch, contacts the guide pin in the first posture, and separates from the guide pin in the second posture. The electric lock according to any one of claims 1 to 5.

7. The guide member In the first posture, by being parallel to the direction in which the latch moves forward and backward, displacement between the locking position and the unlocking position of the latch receiving member is enabled. In the second posture, by being inclined with respect to the first posture, displacement between the locking position and the unlocking position of the latch receiving member is disabled. The electric lock according to claim 6.

8. The anti-panic mechanism portion has an elastic member that pushes out the guide member in a direction from the first posture to the second posture. The guide member maintains the second posture by the elastic member in a state where the lever is not in contact. The electric lock according to claim 7.

9. The case houses the latch receiving member, the drive source, the drive position transmission mechanism portion, and the anti-panic mechanism portion therein, and includes a control board for controlling the operation of the drive source therein. The electric lock according to any one of claims 1 to 5.

10. The control board is communicably connected to a management portion provided outside the case. It has a switch capable of switching between a state of controlling the drive source by the management portion and a state of controlling the drive source by the control board. The electric lock according to claim 9.

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