Tablet unit

Abstract

To provide a lock unit capable of rapidly releasing locking in an emergency while maintaining high security.SOLUTION: There is provided a lock unit with electronic lock and door guard, including an arm 21 rotating about an arm rotation shaft 22 in the first direction R1 to be in the locked state, and rotating in the second direction R2 to be in the unlocked state, a case-side locking portion provided in an indoor case 10, which engages with the arm 21 in the locked state, and restricts the rotation of the arm 21 in the second direction R2, a driving means 30 capable of moving an arm rotation shaft 22 away from the case-side locking portion, control means, and communication means. The control means performs the unlocking operation to control the unlocking of the electronic lock based on an emergency unlocking signal received via the communication means, and control the driving means 30 to move and separate the arm rotation shaft 22 from the case-side locking portion.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a lock unit.

Background Art

[0002] Conventionally, as one of the security facilities used in combination with a lock on the front door, a door guard is known. In addition, with the spread of electronic locks, there is also known a technology that enables the door guard to be locked and unlocked (locked and unlocked) by an operation from the outside when going out, etc., in addition to the operation of the electronic lock (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, a configuration that enables the door guard to be locked from the outside is certainly effective as a double security measure when away from home, but at the same time, it also enables the door guard to be unlocked from the outside as a daily (normal) operation. In this regard, it cannot be said that the security function is high. That is, it is desirable that the door guard is essentially configured to be lockable / unlockable only from the indoor side.

[0005] On the other hand, there is another aspect in case of an emergency. That is, when the resident is in the room and the door guard is locked and the resident is in a state where first aid is required and the resident himself / herself cannot unlock the door guard, even if the rescuer unlocks the lock with a spare key or the like, the door cannot be easily opened, and there are problems such as inability to rescue or taking time for rescue.

[0006] Thus, it is desired to develop a door guard that can achieve the contradictory desire of being able to quickly unlock in an emergency while maintaining high security.

[0007] The present invention has been made to solve such conventional problems, and aims to provide a lock and a lock unit for a door guard that can maintain high security and can quickly release the lock in an emergency.

Means for Solving the Problems

[0008] The present invention is a lock unit including an electronic lock and a door guard, and includes a case attached to the indoor side of a door, a rotation shaft of the door guard attached to be relatively movable with respect to the case, and an arm of the door guard that rotates in a first direction around the rotation shaft to be in a locked state and rotates in a second direction to be in an unlocked state. The case is provided with a case-side locking portion that engages with the arm in the locked state and restricts the rotation of the arm in the second direction. Support means for supporting the rotating shaft; Driving means capable of moving the rotation shaft so as to be separated from the case-side locking portion, first biasing means for biasing the rotation shaft so as to be close to the case-side locking portion, second biasing means for biasing the arm so as to rotate in the second direction, control means, and communication means. The first biasing means is means for applying a biasing force to the support means, and the drive means is means for moving the support means based on the emergency unlocking signal; The control means performs control to unlock the electronic lock based on an emergency unlocking signal received via the communication means, and controls the driving means to perform an unlocking operation of moving the rotation shaft so as to be separated from the case-side locking portion. It relates to a lock unit characterized by the above.

Effects of the Invention

[0009] According to the lock unit of the present invention, it is possible to achieve an excellent effect that high security can be maintained and the lock can be quickly released in an emergency.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0011] Hereinafter, the lock unit 1 according to the present embodiment will be described in detail with reference to the drawings.

[0012] <Overall Configuration> Using FIG. 1, the overall configuration of the lock unit 1 according to the present embodiment will be described. FIGS. 1(A) and 1(B) are external perspective views of an attachment example of the lock unit 1 according to the present embodiment as viewed from the indoor side, and FIG. 1(C) is a top view.

[0013] As shown in FIGS. 1(A) to 1(C), the lock unit 1 of the present embodiment includes a lock case (locking device) 50 installed in a door DR such as an entrance or a room in a living room (dwelling), a case (indoor case) 10 attached to the indoor side of the door DR, and a case (outdoor case 60) attached to the outdoor side of the door DR.

[0014] The outdoor case 60 is provided with an electronic lock (electric lock) 64, and the indoor case 10 has a thumb turn 11 and a door guard unit 20U.

[0015] This lock unit 1 can project or retract the deadbolt 52 of the lock case 50 by the unlocking / locking operation of the electronic lock 64 from the outdoor side or the unlocking / locking operation of the thumb turn 11 from the indoor side. Since the configuration of the electronic lock 64 is the same as the conventionally known configuration, it will be briefly described here.

[0016] As shown in FIG. 1(C), when the electronic lock 64 or the thumb turn 11 is shifted from the unlocked state to the locked state, the deadbolt 52 projects from the door end of the door DR and fits into a strike (recess) provided in the entrance, room, etc., and becomes the locked state, and the door DR is in the locked state. On the other hand, when the electronic lock 64 or the thumb turn 11 is shifted from the locked state to the unlocked state, the deadbolt 52 withdraws from the strike into the lock case 50 and becomes the unlocked state, and the door DR is in the unlocked state. Although not shown, a latch capable of temporary locking is provided vertically above (or below) the deadbolt 52 of the lock case 50.

[0017] Also, although not shown, an outdoor handle is provided on the outdoor side and an indoor handle is provided on the indoor side, and the temporary locking by the latch of the lock case 50 can be released by pulling the outdoor handle (the operation of pulling the outdoor handle forward) or pushing the indoor handle from the indoor side (the operation of pushing the indoor handle backward). Specifically, in a state where the outdoor handle or the indoor handle is not operated, the latch is biased by a spring and fits into the strike, and the retreat into the lock case 50 is restricted, and the door DR is in the state of being temporarily locked by the latch. On the other hand, when the outdoor handle is pulled or the indoor handle is pushed, the latch can retreat into the lock case 50 and becomes the unlocked state, and if the deadbolt 52 is in the unlocked state, the door DR can be opened.

[0018] In this example, when the outdoor handle is pulled or the indoor handle is pushed, the temporary locking by the latch is released and the door DR can be opened to the outdoor side. However, the present invention is not limited to this, and when the outdoor handle is pushed or the indoor handle is pulled, the temporary locking by the latch may be released and the door DR may be configured to be opened to the indoor side. Further, the locking unit 1 may be a right-handed locking device or a left-handed locking device.

[0019] The locking unit 1 further includes a control means 15 for controlling each component of the locking unit 1 and a communication means 16 for transmitting and receiving signals to and from the outside (Fig. (C) thereof). The control means 15 is composed of a CPU, a RAM, a ROM, etc., and executes various controls. Note that the control means 15 may be provided integrally with the locking unit 1 or separately. Also, the communication means 16 may be provided integrally with the locking unit 1 or separately.

[0020] Since the configuration of the lock case 50 is the same as the conventionally known configuration, a detailed description thereof is omitted. The lock case 50 houses a deadbolt drive unit capable of setting the deadbolt 52 in a locked state or an unlocked state and a latch drive unit capable of setting the latch in a temporarily locked state or an unlocked state.

[0021] The electronic lock 64 performs a locking and unlocking operation upon receiving a signal. In the present embodiment, as signals for the electronic lock 64, a locking signal, a normal unlocking signal, and an emergency unlocking signal are used. The electronic lock 64 performs a locking operation when it receives a locking signal. Also, it performs an unlocking operation when it receives a normal unlocking signal and an emergency unlocking signal.

[0022] The locking signal is a signal transmitted based on, for example, the locking operation of the lock by an operator (a user or resident in the room), and is a signal including a password (locking number) for locking the electronic lock 64. The normal unlocking signal is a signal transmitted based on the normal unlocking operation of the lock by the operator during normal times, and is a signal including a password (normal unlocking number) for unlocking the electronic lock 64. The emergency unlocking signal is a signal transmitted by, for example, an emergency unlocking operation of the lock by another operator (a third party other than the resident) during an emergency, and is a signal including a password (emergency unlocking number) for emergency unlocking of the electronic lock 64.

[0023] In this embodiment, the locking operation, the normal unlocking operation, and the emergency unlocking operation can be performed via, for example, a mobile terminal and a communication line. Specifically, the locking signal, the normal unlocking signal, and the emergency (abnormal times) unlocking signal transmitted according to the operation of a mobile terminal (such as a smartphone or a tablet terminal) installed with the locking and unlocking application of the lock unit 1 are received by the communication means 16 of the lock unit 1 via the communication line, and based on this, the control means 15 performs the operations of the locking operation, the normal unlocking operation, and the emergency unlocking operation. In this case, each lock unit 1 in the room and the corresponding operator are associated with a unique identification number (user ID), and user authentication (such as logging in) is essential when using the locking and unlocking application. In such a configuration, the operator of the lock unit 1 may be a person near the door DR or in the room, or a person in a remote location.

[0024] In addition to (or instead of) the above operations, the normal unlocking operation, and the emergency unlocking operation, for example, when the lock unit 1 includes an input means (such as an operation button or a touch panel) not shown, the locking operation, the normal unlocking operation, and the emergency unlocking operation may be enabled by the operation of the input means (such as the input operation of each number or the contact operation of the mobile terminal). Hereinafter, in this embodiment, the case of mainly performing the locking and unlocking operation by the locking and unlocking application of the mobile terminal will be described as an example.

[0025] The locking operation is, for example, tapping the lock button or entering the lock number in the locking and unlocking application. Also, the normal unlocking operation is, for example, tapping the normal unlocking button or entering the normal unlocking number in the locking and unlocking application. When using the lock number or the normal unlocking number, it is desirable that these can be arbitrarily set and changed by the operator.

[0026] On the other hand, the emergency unlocking operation is, for example, tapping the emergency unlocking button or entering the emergency unlocking number in the locking and unlocking application. When using the emergency unlocking number, it is desirable that the number be a preset unique value (for example, "0119", etc.). Note that the emergency unlocking number is not limited to a single value (for example, "0119", etc.), and it may be selectable from a plurality of predetermined unique values (for example, "0119" and "0911", etc.) and settable.

[0027] Also, the lock unit 1 has a door guard 20 having an arm 21 and a receiving member 23 on the indoor side.

[0028] <Door guard unit> The door guard unit 20U will be described with reference to FIGS. 2 to 5. Note that in the following figures, the main parts necessary for the description are appropriately extracted or shown in perspective. FIG. 2 is a diagram for explaining the door guard unit 20U. In the figure, (A) shows the main part of the door guard unit 20U in the locked state, (B) shows the main part of the door guard unit 20U in the unlocked state extracted, (C) is a partially enlarged view of (A) in the same figure, and (D) is a diagram (during state transition) between the locked state and the unlocked state, all of which are perspective views seen from the indoor side.

[0029] Referring to Fig. 2(A), the tablet unit 1 of the present embodiment includes, for example, a door guard unit 20U, a part of which is housed in the indoor case 10. The door guard unit 20U has an arm 21 of the door guard 20, a rotation shaft (arm rotation shaft 22), a support means 24, and a drive means 30. The tablet unit 1 can normally lock and unlock the door guard 20 (its arm 21) only from the indoor side. On the other hand, only when an emergency unlocking operation is performed in an emergency, the communication means 16 (see Fig. 1(C)) of the tablet unit 1 receives an emergency (emergency) unlocking signal (for example, the same signal as the emergency unlocking signal of the electronic lock 64) and can be unlocked. In the present embodiment, for example, even when the operator is at a remote location, the unlocking operation of the door guard 20 (its arm 21) can be performed in an emergency.

[0030] The arm 21 is a substantially U-shaped locking fitting with one end in the longitudinal direction being an open end, and is configured to be rotatable about an arm rotation shaft 22 inserted through the open end. As shown in Figs. 1(C) and 2(A), the arm 21 rotates in a first direction R1 about the arm rotation shaft 22 and engages with a receiving member (locking projection) 23 provided on the indoor side door frame DF or the like to be in a locked state. Further, the arm 21 rotates in a second direction R2 and separates from the receiving member 23 to be in an unlocked state. The door guard 20 is constituted by the arm 21, the arm rotation shaft 22, and the receiving member 23.

[0031] Referring to Figs. 2(B) and 2(C), the axis direction of the arm rotation shaft 22 extends in the vertical direction, and the arm rotation shaft 22 is supported by the support means 24 and is attached in the indoor case 10 so as to be relatively movable with respect to the indoor case 10. More specifically, the support means 24 is an elongated substantially rectangular member in the longitudinal direction (horizontal direction) of the arm 21, and the arm rotation shaft 22 is inserted through one end in the longitudinal direction thereof. Both ends (upper and lower ends) of the arm rotation shaft 22 are exposed from the support means 24 and are fixed to the open end of the arm 21 so as not to fall off in the vertical direction. The arm 21 is is rotatable with respect to the support means 24 in the first direction R1 and the second direction R2.

[0032] Also, a support means rotation shaft 25 is inserted through the other longitudinal end of the support means 24. The support means rotation shaft 25 also has its axial direction extending in the vertical direction, and both ends (upper and lower ends) are exposed from the support means 24 and fixed to the fixing member 10A inside the indoor case 10. Thereby, the support means 24 is rotatable about the support means rotation shaft 25 in a third direction R3 and a fourth direction R4. The third direction R3 is the direction in which the arm rotation shaft 22 supported at one end of the support means 24 approaches the door DR, and the fourth direction R4 is the direction opposite to the third direction R3 and in which the arm rotation shaft 22 moves away from the door DR (FIG. 2(C), FIG. 2(D), FIG. 1(C)). With such a configuration, the arm rotation shaft 22 is relatively movable with respect to the indoor case 10. Specifically, it is movable in the third direction R3 approaching the door DR and the fourth direction R4 moving away from the door DR inside the indoor case 10.

[0033] Also, the support means 24 has two opposing side surfaces 241 and 242, and is accommodated in the indoor case 10 such that one side surface 241 faces the door DR and the other side surface 242 faces the inner wall 101 of the indoor case 10 (FIG. 1(C), FIG. 2(A), FIG. 2(C)). And, a first biasing means 26 is provided near the arm rotation shaft 22 on the other side surface 242 (FIG. 2(B), FIG. 2(C)). As shown in detail in FIG. 2(C), the first biasing means 26 is, for example, a coil spring accommodated in a recess 243 provided on the side surface 242, with one end side of the coil winding abutting against the recess 243 and the other end side abutting against the inner wall 101 of the indoor case 10 (FIG. 2(A)). By this first biasing means 26, the support means 24 is constantly biased to rotate in the third direction R3, and as a result, the arm rotation shaft 22 is constantly biased in the direction approaching the door DR (to move in the third direction R3).

[0034] Also, as shown in FIGS. 2(C) and 2(D), the arm 21 is constantly biased by the second biasing means 27 so that the arm 21 rotates in the second direction R2 (the direction in which the locking is released). The second biasing means 27 is, for example, a torsion spring, which is rotatably mounted on the arm rotation shaft 22 protruding from the upper surface of the support means 24 and is disposed between the arm 21 and the support means 24. One end thereof is fixed to the protrusion 244 provided on the upper surface of the support means 24, and the other end is fixed to the recess 211 provided on the inner wall of the arm 21.

[0035] Further, the arm 21 of the present embodiment engages with a part of the indoor case 10. As shown in FIG. 2(C), the planar shape of the head (the insertion region of the arm rotation shaft 22) 21H of the arm 21 is substantially circular (substantially elliptical), but a part of its circumferential surface has a step formed in the circumferential direction due to a change in the length in the radial direction (the radial direction centered on the arm rotation shaft 22). That is, the head 21H includes a large-diameter region 21HB with a long radial length and a small-diameter region 21HS with a short radial length, and the circumferential surface (curved surface) of the large-diameter region 21HB and the circumferential surface (curved surface) of the small-diameter region 21HS are continuous via a plane. This stepped portion including this plane is the arm-side locking portion 212, and a part of the circumferential surface of the large-diameter region 21HB adjacent (continuous) to the arm-side locking portion 212 is the arm-side abutting portion 213.

[0036] FIG. 3 is a perspective view seen from the indoor side, showing the upper part of the indoor case 10 extracted. The description of the arm 21 is omitted in FIG. 3(A). The arm 21 is rotatably disposed on the upper surface 102 of the indoor case 10. And a partition portion 111 protruding vertically upward is provided between the arm 21 and the door DR on the upper surface 102. The partition portion 111 is formed in a shape along the head 21H of the arm 21 in part. That is, in the vicinity of the head 21H, a stepped case-side locking portion 112 protruding toward the arm 21 and a case-side abutting portion 113 adjacent (continuous) thereto are formed.

[0037] The case-side locking portion 112 engages with the locking arm 21 as shown in FIGS. (D) and (E) of the same drawing, and restricts the rotation of the arm 21 in the second direction R2, and has a shape that can be sufficiently locked (engaged) with the arm-side locking portion 212. Further, as shown in FIG. (B) of the same drawing, the case-side contact portion 113 has, for example, a curved surface shape that can contact the arm-side contact portion 213 in the unlocked state.

[0038] That is, when the arm 21 is in the unlocked state as shown in FIG. (B) of the same drawing, the case-side contact portion 113 and the arm-side contact portion 213 come into contact with each other. Further, as shown in FIG. (C) of the same drawing, when the arm 21 rotates in the first direction R1, the head 21H slides in the direction in which the case-side contact portion 113 and the arm-side contact portion 213 are separated from each other, and a gap is generated between the head 21H facing the case-side contact portion 113, and the case-side locking portion 112 adjacent to the case-side contact portion 113 and the arm-side locking portion 212 adjacent to the arm-side contact portion 213 approach each other, and the case-side locking portion 112 and the arm-side locking portion 212 can be engaged with each other (FIGS. (C) and (D) of the same drawing).

[0039]

[0040] ​When the operator rotates the arm 21 from this state in the first direction R1 against the biasing force of the second biasing means 27, the case-side contact portion 113 and the arm-side contact portion 213 slide relative to each other, and a gap is formed between the head portion 21H facing the case-side contact portion 113 (Fig. (C) of the same figure). As a result, the restriction on the rotation of the support means 24 in the third direction R3 is released. Here, the support means 24 is receiving the biasing force of the first biasing means 26. When the force in the third direction R3 among the holding forces of the arm 21 by the operator becomes smaller than the biasing force of the first biasing means 26, the support means 24 rotates in the third direction R3 by the biasing force of the second biasing means 27. Alternatively, the operator may (slightly) push the arm 21 in the third direction R3 while holding the arm 21.

[0041] As a result, the arm rotation shaft 22 supported by the support means 24 approaches the case-side locking portion 112, and as a result, the case-side locking portion 112 and the arm-side locking portion 212 engage with each other (Fig. (D) of the same figure). Thereby, even when the operator releases the holding of the arm 21, the arm 21 maintains the upright state, and here, it is in a locked state locked to a receiving member 23 (not shown) (see Fig. 8(C)).

[0042] In this way, in the present embodiment, the locked state of the arm 21 is maintained by the engagement of the case-side locking portion 112 and the arm-side locking portion 212. That is, the rotation of the arm 21 in the second direction R2 by the second biasing means 27 is restricted (Fig. (D) of the same figure). That is, the operator loosens the holding force of the arm 21 between Fig. (C) and Fig. (D) of the same figure, but does not allow the arm 21 to rotate in the second direction R2, supports the arm 21, or (slightly) pushes the arm 21 in the third direction R3 while holding the arm 21 as described above.

[0043] On the other hand, in the unlocked state (Fig. (B)), the arm-side contact portion 213 contacts the case-side contact portion 113, thereby restricting the movement of the arm rotation shaft 22 in the third direction R3 by the first biasing means 26.

[0044] Next, the driving means 30 will be described with reference to FIGS. 4 and 5. FIGS. 4(A) and 4(B) are views showing the door guard unit 20U in a state where the driving means 30 is not driving. FIG. 4(A) is a front view seen from the indoor side, and FIG. 4(B) is a perspective view seen from the door DR side. FIGS. 4(C) and 4(D) are views showing the door guard unit 20U in a state where the driving means 30 is driving. FIG. 4(C) is a front view seen from the indoor side, and FIG. 4(D) is a perspective view seen from the door DR side. FIGS. 5(A) to 5(C) are views showing the door guard unit 20U in a state where the driving means 30 is driving, and are perspective views seen from the door DR side. FIG. 5(D) is a perspective view showing the vicinity of the head 21H of the arm 21 in the locked state from the indoor side.

[0045] In the description of this figure, for the sake of convenience of explanation, the vertical direction (the up-and-down direction in FIG. 4(A)) is defined as the height direction H of the support means 24, the direction orthogonal to the height direction H and parallel to the surface of the door DR is defined as the width direction W of the support means, and the direction orthogonal to the height direction H and the width direction W is defined as the thickness direction D of the support means 24.

[0046] The driving means 30 rotates the support means 24 in the fourth direction R4 against the biasing force of the first biasing means 26.

[0047] As shown in FIGS. 4(A) and 4(B), the driving means 30 is fixed to, for example, the inner wall of the indoor case 10 below the support means 24, and includes a motor 31, a power conversion means 32 that converts the rotational power of the motor 31 into linear power, and a slider 33 configured to be movable horizontally by the power conversion means 32. As shown in detail in FIG. 4(A), the power conversion means 32 includes, for example, a worm 321 provided on the rotating shaft 311 of the motor 31, a gear train including a worm wheel 322, gears 323 and 324 (pinions), and a rack 325. The rotational power of the rotating shaft 311 of the motor 31 is changed in direction and decelerated by the worm 321, and is transmitted to the rack 325 through the gear train including the worm wheel 322 to become linear power. Note that the configuration of the power conversion means 32 is not limited to this.

[0048] In this example, the rack 325 is provided integrally with the slider 33, and the slider 33 has a push bar 331 that protrudes vertically upward (in the height direction H of the support means 24). Thus, when the motor 31 rotates, the slider 33 reciprocates in the horizontal direction (the width direction W of the support means 24, the left - right direction shown in the figure).

[0049] Also, as shown in FIG. 4(B), an inclined convex portion 275 is provided on the side surface 271 of the support means 24 facing the door DR. The inclined convex portion 275 is a substantially frustum - shaped protrusion having an inclined surface 275A that inclines such that the height (height in the thickness direction D of the support means 24) increases from the support means rotation axis 25 side toward the arm rotation axis 22 side, and an extrusion surface 275B that is connected thereto and is substantially parallel to the side surface 271 of the support means 24. The extrusion surface 275B is provided at a position where the surface (front surface) of the push bar 331 abuts when the slider 33 is closest to the arm rotation axis 22.

[0050] The slider 33 reciprocates in the horizontal direction (the width direction W of the support means 24) from the initial position to the extrusion position. The initial position is, as shown in FIGS. (A) and (B) of the same figure, a position where the push bar 331 is closer to the support means rotation axis 25 than the inclined convex portion 275 and the surface (front surface) of the push bar 331 abuts or is close to the side surface 271 of the support means 24. The extrusion position is, as shown in FIGS. (C) and (B) of the same figure, a position where the surface (front surface) of the push bar 331 abuts the extrusion surface 275B of the inclined convex portion 275.

[0051] When the motor 31 rotates when the slider 33 is in the initial position (Figs. (A) and (B)), the slider 33 starts to move from the initial position via the power conversion means 32. As a result, the extrusion bar 331 comes to ride on the inclined convex portion 275. Here, the biasing force of the first biasing means 26 is set smaller than the force for pushing out the support means 24 by the horizontal movement of the slider 33. For this reason, the extrusion bar 331 slides on the inclined surface 275A against the biasing force of the first biasing means 26 (Fig. (C)) and reaches the extrusion surface 275B. Along with this, the support means 24 is pushed out toward the indoor side and rotates in the fourth direction R4 about the support means rotation axis 25 (Fig. (D)). Then, due to the rotation of the support means 24 in the fourth direction R4, the arm rotation axis 22 supported thereby moves in a direction away from the door DR, that is, away from the case-side locking portion 112, and the engagement between the arm-side locking portion 212 and the case-side locking portion 112 is disengaged (Fig. (D)). That is, the height of the inclined convex portion 275 (the height in the thickness direction D of the support means 24) is set higher than the radial length L of the plane constituting the arm-side locking portion 212 (see Fig. 2(C)).

[0052] As shown in Fig. 5(A), when the engagement between the arm-side locking portion 212 and the case-side locking portion 112 is disengaged and the operator does not hold the arm 21, the arm 21 rotates in the second direction R2 by the biasing force of the second biasing means 27. Then, the arm 21 is detached from the receiving member (not shown here), and as shown in Fig. (B) of the same figure, the door guard 20 is in a state where the locking is released.

[0053] The door guard unit 20U further has detection means (not shown in the figure) (for example, sensors, pulse counters, etc.). Based on the detection by the detection means that the slider 33 has reached the pushed-out position, the driving means 30 moves the slider 33 to the initial position (Figure (C) of the same drawing). When the slider 33 moves to the initial position, the extrusion of the support means 24 by the extrusion bar 331 is also released. As a result, the biasing force of the first biasing means 26 is again applied to the support means 24, and the support means 24 rotates in the third direction R3 around the support means rotation axis 25 and returns to the state before extrusion. The rotation of the support means 24 in the third direction R3 is restricted and stopped at a predetermined position by the contact between the arm-side contact portion 213 and the case-side contact portion 113 (Figure (D) of the same drawing).

[0054] Note that the above has described the operation of releasing the locking of the arm 21 by the driving means 30, but this is only the operation when an emergency unlocking signal is received. That is, in this embodiment, the locking of the arm 21 is manually released during normal times. Hereinafter, it will be described assuming that the driving means 30 is not operating (the slider 33 is in the initial position) in FIGS. 4 and 5. The operator holds the arm 21 and pulls the arm 21 back toward the indoor side as shown in FIG. 4(D). At this time, pull it back at least until it exceeds the height of the inclined convex portion 275.

[0055] As a result, the support means 24 rotates in the fourth direction R4 around the support means rotation axis 25. Then, due to the rotation of the support means 24, the arm rotation axis 22 supported thereby moves in a direction away from the door DR, that is, away from the case-side locking portion 112, and the engagement between the arm-side locking portion 212 and the case-side locking portion 112 is disengaged.

[0056] Then, as shown in Fig. 5(A), when the operator releases the holding of the arm 21 in a state where the engagement between the arm-side locking portion 212 and the case-side locking portion 112 is disengaged (the operator may slightly rotate the arm 21 in the second direction R2), the door guard 20 becomes unlocked as shown in Fig. 5(B). When the arm 21 starts to rotate in the second direction R2, the operator does not need to touch the arm 21. Thereafter, similarly to the movement by the driving means 30, the support means 24 rotates in the third direction R3 and returns to the state before extrusion, and is regulated and stopped at a predetermined position by the contact between the arm-side contact portion 213 and the case-side contact portion 113 (Fig. 5(D)).

[0057] <Locking and unlocking operations of the lock unit> Referring to Figs. 6 to 10, the locking and unlocking operations of the lock unit 1 of the present embodiment will be specifically described. Fig. 6 is a table showing a list of whether the locking and unlocking operations of the thumb turn 11 and the locking operation of the door guard 20 in the lock unit 1 are possible or not.

[0058] First, the lock unit 1 of the present embodiment enables a rescuer to enter the room from the outside when a user (resident) in the room, who is the first operator, is in a state of needing first aid while being in the room. That is, as emergency operations, locking operations of the thumb turn 11 from the indoor side and the outdoor side, locking operations of the door guard 20 from the indoor side and the outdoor side, unlocking operations of the thumb turn 11 from the indoor side, and unlocking operations of the door guard 20 from the indoor side are not assumed (it is not necessary to assume them in common sense).

[0059] That is, regarding the locking and locking operations in normal times, locking operations of the thumb turn 11 and the door guard 20 from the indoor side are possible. Also, in normal times, based on the operation of the electronic lock 64 from the outdoor side, it is possible to lock the thumb turn 11 (electronic lock 64) by receiving a locking signal via the communication means 16. On the other hand, in normal times, an operation of locking the door guard 20 from the outdoor side cannot be performed.

[0060] Next, regarding the unlocking and locking release operations, first, the unlocking operation of the thumb turn 11 from the indoor side and the locking release operation of the door guard 20 are possible during normal times. Also, during normal times, based on the operation of the electronic lock 64 from the outdoor side, it is possible to unlock the thumb turn 11 (electronic lock 64) by receiving an unlocking signal via the communication means 16. On the other hand, during normal times, the operation of releasing the lock of the door guard 20 from the outdoor side cannot be performed.

[0061] In case of an emergency, based on the operation of the electronic lock 64 from the outdoor side, it is possible to unlock the thumb turn 11 (electronic lock 64) by receiving an emergency unlocking signal via the communication means 16. In addition to this, by receiving an emergency unlocking signal via the communication means 16, the operation of releasing the lock of the door guard 20 from the outdoor side can be performed. This will be specifically described below.

[0062] FIG. 7 is a schematic diagram showing an example of an unlocking and locking system 200 capable of remotely operating the locking and unlocking of the locking unit 1. The locking unit 1 of the present embodiment is applicable to such an unlocking and locking system.

[0063] The unlocking and locking system 200 is configured to include, for example, the above-described locking unit 1, a communication line 201 that is communicably connected to the locking unit 1, a first operator, that is, a mobile terminal 202 owned by the resident A of the room (such as a house) where the locking unit 1 is installed, a second operator, that is, a mobile terminal 203 owned by the relative B of the resident A (relatives such as cohabiting family members or separately living family members), and a server device (cloud server device) 204. In this case, the control means 15 of the locking unit 1 may be provided in the server device 204. Note that the number of operators may be three or more.

[0064] The mobile terminals 202 and 203 are each portable terminals (such as smartphones and tablet terminals) installed with the locking / unlocking application AP of the lock unit 1. With the locking / unlocking application AP, normal locking / unlocking operations and emergency unlocking operations are possible. The lock unit 1 in each room and the corresponding first operator A and second operator B are associated with each other by a unique identification number (user ID), and login authentication is required when using the locking / unlocking application AP.

[0065] When the locking operation is performed by the first operator A and / or the second operator B via the locking / unlocking application AP, the server device 204 transmits a locking signal, and the lock unit 1 that receives this performs the locking operation of the electronic lock 64. The locking signal is a signal including a password number (locking number) for locking the electronic lock 64. The locking number can be arbitrarily set and changed by the operator. A conventionally known method can be adopted for this locking operation.

[0066] Also, when the normal unlocking operation is performed by the first operator A and / or the second operator B via the locking / unlocking application AP, the server device 204 transmits a normal unlocking signal, and the lock unit 1 that receives this performs the unlocking operation of the electronic lock 64. The unlocking signal is a signal including a password number (normal unlocking number) for unlocking the electronic lock 64. The normal unlocking number can be arbitrarily set and changed by the operator. A conventionally known method can be adopted for this unlocking operation.

[0067] In addition to these, the locking and unlocking application AP of the present embodiment can, as an emergency operation, send a notification (e.g., a push notification) to a second operator (a related person) B indicating that first operator (resident, person in need of emergency medical assistance) A requires emergency medical assistance based on a single click operation or the like by first operator A. In addition to this, an emergency unlocking signal can be transmitted from the mobile terminal 202 of person in need of emergency medical assistance A to the lock unit 1. Further, based on an emergency unlocking operation from the mobile terminal 203 of related person B when related person B determines that first operator A requires emergency medical assistance, an emergency unlocking signal can be transmitted from the server device 204 to the lock unit 1. The emergency unlocking signal is a signal including a password (emergency unlocking number) for emergency unlocking of the electronic lock 64 and has a fixed value (e.g., "0119", etc.). In this case, it is preferable that the locking operation be performed by the control means 15 after a predetermined time (e.g., 1 hour, etc.) has elapsed since the emergency release operation.

[0068] The communication line 201 is a general term for lines that can transmit a locking signal and normal and emergency unlocking signals transmitted based on various operations of first operator A and / or second operator B to the communication means 16 of the lock unit 1, and can be any type, whether wired or wireless. For example, in the case of wireless, it may be another type or standard wireless data communication network such as a mobile communication network or a wireless LAN method, or a communication line using a power-saving (low power) and wide-area (long-distance) wireless communication technology (e.g., LPWA (Low Power Wide Area) or LPWAN (Low Power Wide Area Network)). Alternatively, the communication line may be a LAN, the Internet, or a dedicated communication line (e.g., a CATV (Community Antenna Television) line), or a communication line constructed by a gateway or the like, or a line in which a communication path is configured by a plurality of these lines. That is, in the present embodiment, when operators A and B perform locking and unlocking operations, they can operate whether they are near the door DR or in a remote location.

[0069] Note that, not limited to the above-described unlocking and locking system 200 (instead of or in addition to the above method), a locking signal or an unlocking signal may be transmitted by operating a button of an electronic key near the door DR. Further, for example, an input means (such as an operation button or a touch panel) may be included in the outdoor case 60 of the lock unit 1, and a locking signal or an unlocking signal may be transmitted by operating the input means (such as a predetermined button operation, an input operation of a locking number or an unlocking number, or a contact operation of a mobile terminal). In the case of a configuration that can be unlocked by an input operation of an unlocking number, in an emergency, for example, the operator B orally conveys an emergency unlocking number (such as "0119") to the rescuer C (such as an emergency medical technician), and based on the input operation of the emergency unlocking number by the rescuer C, an emergency unlocking operation may be performed. In this case, it is desirable that the emergency unlocking number becomes invalid (unlockable) after a predetermined time has elapsed (for example, after 1 hour) (the rescuer C is also informed that it is time-limited).

[0070] Alternatively, based on the input operation of the emergency unlocking number by the rescuer C, a time-limited password (one-time password) may be issued and displayed on the issuing and displaying means as an auxiliary emergency unlocking number, and the emergency unlocking operation of the lock unit 1 may be performed by operating the input of the password. That is, in this case, the auxiliary emergency unlocking number (time-limited password) is also included in the "emergency unlocking number" of the present embodiment.

[0071] <<Normal-time indoor-side locking operation>> FIG. 8 is a perspective view showing the lock unit 1 for explaining the locking and latching operations from the indoor side in normal times and the locking and latching operations of the lock unit 1 based thereon.

[0072] FIG. (A) shows a case where the thumb turn 11 is in the unlocked state and the door guard 20 (arm 21 and receiving member 23) is in the unlocked state. When the thumb turn 11 is locked from the indoor side in this state, as shown in FIG. (B), an operator (such as a resident) inside the room rotates the thumb turn 11 in a predetermined direction (counterclockwise in FIG. 7). As a result, the deadbolt 52 protrudes from the end of the door DR and fits into the strike (recess), and the door DR becomes locked.

[0073] Also, regarding the door guard 20, in this example, an arm accommodation groove 210 is provided on the surface of the indoor case 10. When the door guard 20 is in the unlocked state, the arm 21 falls (is folded) parallel to the surface of the door DR as shown in FIG. (A) of the same drawing and is accommodated in the arm accommodation groove 210. Although the support means 24 is constantly biased by the first biasing means 26 to rotate in the third direction R3, when the door guard 20 is in the unlocked state, the case-side contact portion 113 and the arm-side contact portion 213 come into contact with each other, and the movement of the support means 24 in the third direction R3 is restricted (see FIG. 3(B)).

[0074] When the door guard 20 in such an unlocked state is locked from the inside of the room, the operator holds the arm 21 and rotates it in the first direction R1 as shown in FIG. 7(C) to make it stand up with respect to the door DR. Due to the rotation of the arm 21, the case-side contact portion 113 and the arm-side contact portion 213 are relatively separated (FIG. 3(B)), and the restriction on the rotation of the support means 24 in the third direction R3 is released due to the separation of the two. When the force in the third direction R3 among the holding forces of the arm 21 by the operator becomes smaller than the biasing force of the first biasing means 26, the support means 24 rotates in the third direction R3 by the biasing force of the first biasing means 26. As a result, the arm rotation shaft 22 approaches the case-side locking portion 112, and the case-side locking portion 112 and the arm-side locking portion 212 are engaged, and the arm 21 and the receiving member 23 (the door guard 20) are in a locked state (FIG. 3(D)). Although the arm 21 is constantly biased by the second biasing means 27 in the second direction R2 (the direction in which the locking of the arm 21 is released), the locked state is maintained (locked) by the engagement of the case-side locking portion 112 and the arm-side locking portion 212 (FIG. 8(C), FIG. 3(E)).

[0075] According to this embodiment, when the arm 21 is manually raised, the urging force of the first urging means 26 causes the arm rotation shaft 22 to move (the arm 21 itself moves in the direction of being pushed from the indoor side), and the engagement between the case-side locking portion 112 and the arm-side locking portion 212 holds the arm 21 in the raised state (locked state). Although the second urging means 27 urges the arm 21 in the direction of falling it down (releasing the lock), the locked state of the arm 21 is maintained by the physical contact (engagement) between the case-side locking portion 112 and the arm-side locking portion 212.

[0076] Here, for example, consider a configuration in which the second urging means acting in the direction of falling the arm (releasing the lock) and the first urging means acting in the direction of holding the arm in the raised state act directly on the arm simultaneously. Specifically, it is a configuration in which the balance of the urging forces of the opposing first and second urging means holds the arm in the locked state. In this case, it is necessary to appropriately adjust the balance of the urging forces of both, and there are problems such as the cost of the components (each spring) itself and the complexity of the manufacturing process. Also, due to a decrease in the urging force of the spring due to aging deterioration and wear of each component, the operation may become sluggish, making it difficult to hold the arm in the raised state. That is, a configuration relying on the balance of opposing urging forces is not desirable from the perspective of durability. That is, the arm 21 can be surely held in the raised state without precisely adjusting the balance between the urging force of the first urging means 26 and the urging force of the second urging means 27.

[0077] In contrast, in this embodiment, it has a configuration including the second urging means 27 that acts in the direction of falling the arm 21 (releasing the lock) and the first urging means 26 that acts in the direction of holding the arm in the raised state (locking it) (and thus acts to press the support means 24 against the inner surface of the indoor case 10). However, the locked state of the arm 21 is maintained by the physical contact (engagement) between the case-side locking portion 112 and the arm-side locking portion 212. That is, there is no need to rely on the balance between the urging force of the first urging means 26 and the opposing urging force of the second urging means 27, and problems due to aging deterioration can be avoided, and the arm 21 can be surely held in the raised state.

[0078] <<Normal Outdoor Locking Operation>> Next, the locking operation of the thumb turn 11 from the outside when the thumb turn 11 is in the unlocked state and the door guard 20 (arm 21 and receiving member 23) is in the unlocked state will be described. This is the locking operation when going out normally, etc. The operator closes the door DR and performs the locking operation of the electronic lock 64 from the outside. This locking operation is the same as the operation of the known electronic lock 64. Here, a configuration in which the locking and unlocking operations can be performed from the outside by the mobile terminal held by the operator will be briefly described as an example. That is, the operator performs the locking operation of the locking and unlocking application on the mobile terminal in which the locking and unlocking application of the lock unit 1 is installed. Based on this, the server device 204 transmits a locking signal. When the communication means 16 of the lock unit 1 receives the locking signal transmitted via the communication line 201, the control means 15 controls the thumb turn 11 and rotates it counterclockwise in this example to lock the door DR.

[0079] On the other hand, the door guard 20 does not operate depending on the locking signal of this thumb turn 11. Also, in this example, the door guard 20 cannot be locked by an operation from the outside during normal times. For example, even if there is no signal (locking signal) for locking the door guard 20 or if the communication means 16 of the lock unit 1 receives some signal, the control means 15 does not control the door guard unit 20U thereby, that is, the control to lock the arm 21 is not performed. The door guard 20 remains in the unlocked state, and only the thumb turn 11 becomes the locked state (for example, the state in FIG. 9(B)).

[0080] <<Normal Indoor Unlocking Operation>> FIG. 8 is a diagram for explaining the unlocking and unlocking release operation from the indoor side during normal times and the unlocking and unlocking release operation of the lock unit 1 based on the same, and is a perspective view of the lock unit 1 as seen from the indoor side.

[0081] First, for example, starting from the locked state shown in Fig. 7(C) and the locked state of the door guard 20, the operator inside the room rotates the thumb turn 11 in a predetermined direction (clockwise direction in Fig. 7). As a result, the deadbolt 52 is retracted into the door end of the door DR, and the door DR is unlocked (Fig. 9(A)). When the thumb turn 11 is unlocked while the door guard 20 remains in the locked state, as shown in Fig. (A), with the arm 21 and the receiving member 23 engaged, the door DR can be opened by the length of the inner circumference of the arm 21.

[0082] Next, referring to Figs. 8(B) and 8(C), the unlocking of the door guard 20 will be described. In both figures, the thumb turn 11 is in the locked state. However, when operating from the indoor side, the operations of the thumb turn 11 and the door guard 20 can be at the discretion of the operator and can be performed independently.

[0083] When the arm 21 is in the locked state, although the arm 21 is biased in a second direction R2 (the direction in which the locking is released) by the second biasing means 27, the locking state is maintained (locked) by the engagement of the case-side locking portion 112 and the arm-side locking portion 212.

[0084] To release this, the operator first holds the arm 21 and performs a pulling-in operation of slightly pulling it into the indoor side (front) (see Fig. 9(B), Fig. 4(D)). As a result, the support means 24 rotates in a fourth direction R4 against the biasing force of the first biasing means 26, the case-side locking portion 112 and the arm-side locking portion 212 are separated, and the engagement between the two is released (Fig. 5(A)). Then, the arm 21 is folded by the biasing force of the second biasing means 27 (the operator may slightly rotate the arm 21 in the second direction R2 (the folding direction)), is accommodated in the arm accommodation groove 210, and is in the unlocked state (Fig. 9(C), Fig. 5(B), Fig. 5(C)). As described above, the pulling-in operation by the operator from the indoor side functions in the same way as the pushing-in operation of the support means 24 by the slider 33 (the pushing bar 331) shown in Figs. 4 and 5 (the slider 33 does not move).

[0085] In this embodiment, as described above, the locked state of the arm 21 is maintained by the physical contact (engagement) between the case-side locking portion 112 and the arm-side locking portion 212, and the arm 21 can be reliably held in the upright state without relying on the balance between the biasing force of the first biasing means 26 and the opposing biasing force of the second biasing means 27. Therefore, in order to manually release the lock of the arm 21 from indoors, it is necessary to perform a retracting operation. By making this retracting operation an essential configuration, the crime prevention performance can be enhanced.

[0086] For example, there may be a case where a resident holds the door guard 20 in a locked state for ventilation purposes or the like while keeping the door DR open (see Fig. 8(A)). In such a case, with a conventional general door guard, there is a risk of illegally releasing the door guard for criminal purposes. Specifically, there is a method of illegally releasing the door guard by inserting a finger from the outside, hooking a telescopic member on the tip of the arm of the door guard, and closing the door while pulling the member to the outside to tilt the arm. On the other hand, in this embodiment, when releasing the door guard 20, it is necessary to retract the arm 21 indoors, so such illegal release can be prevented.

[0087] Note that, as long as it is an operation from the indoor side, the operation of the thumb turn 11 and the operation of the door guard 20 (especially the locking operation and the unlocking operation) may be interlocked. For example, in conjunction with the locking operation of the thumb turn 11, the control means 15 may (automatically) bring the door guard 20 into a locked state.

[0088] <<Normal-time outdoor unlocking operation>> The unlocking operation of the thumb turn 11 from the outside in normal times is the same as the locking operation of the thumb turn 11 from the outside described above, except that the signal transmitted to the lock unit 1 is the normal unlocking operation signal, so detailed description is omitted. That is, it is an unlocking operation when normally returning home. When the unlocking operation of the locking and unlocking application is performed on the mobile terminal held by the operator, a normal unlocking signal is transmitted. When the communication means 16 of the lock unit 1 receives the normal unlocking signal transmitted via the communication line, the control means 15 controls the thumb turn 11 and rotates it in the clockwise direction in this example to unlock the door DR.

[0089] On the other hand, the door guard 20 does not operate depending on the normal unlocking signal of this thumb turn 11. That is, the control means 15 does not perform control to release the locking of the arm 21. For example, even if there is one resident indoors and the door guard 20 is in the locked state, and another resident can unlock the thumb turn 11 from the outside by the normal unlocking signal, the door DR cannot be fully opened due to the locking of the door guard 20.

[0090] <<Emergency unlocking operation from the outside>> Next, a case where the locking of the door guard 20 is released together with the unlocking operation of the thumb turn 11 from the outside in an emergency will be described. For example, it is assumed that the first operator (resident) A shown in FIG. 7 has set the thumb turn 11 in the locked state and the door guard 20 is also in the locked state, and then the first operator has fallen into a state of being in need of first aid where any operation is impossible, such as being unconscious or unable to move, indoors.

[0091] In such a state, if possible, the first operator (the resident in need of first aid, hereinafter referred to as "the first aider A") performs an emergency unlocking operation of the locking and unlocking application AP using his or her own mobile terminal 202. Based on this operation, the server device 204 transmits an emergency release signal. Also, based on this operation, the locking and unlocking application AP notifies (for example, push notification) the authenticated second operator (hereinafter referred to as "the related person B") via the server device 204 that it is an emergency.

[0092] In addition, when person B determines that emergency unlocking is necessary because the person in need of first aid is unable to perform the emergency unlocking operation and cannot be contacted, person B performs an emergency unlocking operation of the unlocking application using, for example, the mobile terminal 203 that he or she holds.

[0093] When the communication means 16 of the lock unit 1 receives an emergency release signal transmitted via the communication line 201 by an emergency release operation performed by the person in need of first aid A and / or person B, the control means 15 controls the thumb turn 11 and rotates it in the clockwise direction in this example to unlock the door DR (Fig. 9(A)).

[0094] In addition, the control means 15 controls the drive means 30 based on the (same) emergency unlocking signal received via the communication means 16 to perform a locking release operation of the door guard 20.

[0095] Before receiving the emergency unlocking signal (i.e., during normal times), even if the door guard 20 is manually operated, the slider 33 of the drive means 30 does not move, that is, the slider 33 is in the initial position (Figs. 4(A) and 4(B)). When the communication means 16 receives the emergency unlocking signal in this state, the control means 15 controls the drive means 30 to release the locking of the arm 21. That is, the control means 15 rotates the motor 31 to move the slider 33 from the initial position. As a result, the push bar 331 slides on the inclined surface 275A against the biasing force of the first biasing means 26 (Fig. 4(C)) and reaches the push-out surface 275B. The support means 24 rotates in the fourth direction R4 about the support means rotation shaft 25 and is pushed out toward the indoor side (Fig. 4(D)). Thereby, the arm rotation shaft 22 moves so as to be separated from the case-side locking portion 112, and the engagement between the arm-side locking portion 212 and the case-side locking portion 112 is disengaged (Fig. 5(A)). The arm 21 rotates in the second direction R2 by the biasing force of the second biasing means 27, disengages from the receiving member 23, and the door guard 20 is in a locked state (Fig. 5(B)). When the detection means (not shown) of the door guard unit 20U detects the arrival of the slider 33 at the pushed-out position, the control means 15 moves the slider 33 to the initial position by the drive means 30 (Fig. 5(C)).

[0096] As a result, the door DR can be fully opened, allowing the arriving person B to enter the room. Also, for example, when the person B is far away, there is a possibility that the rescuer C (who has received a report from the person) may arrive at the room first. Even in such a case, for example, by the operation of the person in need of first aid A himself / herself or by remote operation by the person B, if the unlocking of the electronic lock 64 and the unlocking of the door guard 20 are configured to be released, immediate treatment can be provided by the rescuer C who has arrived first without waiting for the arrival of the person B.

[0097] Also, in the case of a configuration using the unlocking application AP of the above-described unlocking and locking system 200, all unlocking operations of the lock unit 1 can be performed on a single portable terminal 202, 103 even in an emergency. Therefore, particularly regarding the unlocking operation in an emergency, there is no need to separately remember the form of a key for the emergency unlocking operation or a separately set password. That is, there is no risk of losing the key or forgetting the password, and there is no need to wait for the arrival of the person carrying the key, so immediate response in an emergency is possible.

[0098] Thus, according to the present embodiment, only when the control means 15 receives an emergency unlocking signal transmitted from the outside, the electronic lock 64 is unlocked and the door guard 20 is unlocked. As a result, a high level of security is maintained while the locking can be quickly released in an emergency.

[0099] In addition, in order to enable the unlocking of the door guard 20 from the outside, a first biasing means 26 that biases the arm rotation shaft 22 in a direction of pushing it into the door DR side so as to maintain the standing state of the door guard 20, and a second biasing means 27 that applies a biasing force in a direction of tilting the arm 21 are provided. In this case, although the first biasing means 26 and the second biasing means 27 are configured to generate opposing biasing forces, the locked state of the arm 21 is maintained by the physical contact (engagement) between the case-side locking portion 112 and the arm-side locking portion 212. That is, since the biasing force of the first biasing means 26 and the second biasing means 27 do not directly act on the arm 21, there is no need to rely on the balance of the opposing biasing forces of both, and problems due to aging deterioration can be avoided, and the arm 21 can be reliably held in the standing state.

[0100] Furthermore, in order to release the door guard 20 without relying on the emergency release signal, it is necessary to pull the arm 21 into the room side in order to separate the case-side locking portion 112 and the arm-side locking portion 212. Therefore, the door guard 20 cannot be released by the method of illegal unlocking of the door guard that is a concern with conventional general door guards, and the crime prevention effect can be enhanced.

Explanation of Reference Numerals

[0101] 1 tablet unit 10 indoor case 10A fixing member 11 thumb turn 15 control means 16 communication means 20 door guard 20U door guard unit 21 arm 21H head 21HB large-diameter region 21HS small-diameter region 22 arm rotation shaft 23 receiving member (locking pin) 24 support means 25 support means rotation shaft 26 first biasing means 27 second biasing means 30 driving means 31 Motor 32 Power conversion means 33 Slider 50 Tablet case (tablet device) 52 Deadbolt 60 Outdoor case 64 Electronic lock (electric lock) 101 Inner wall 102 Upper surface 111 Partition part 112 Case-side locking part 112 Result case-side locking part 113 Case-side abutting part 122 Case-side locking part 200 Locking and unlocking system 201 Communication line 202, 203 Mobile terminal 204 Server device (cloud server device) 210 Arm accommodation groove 211 Recess 212 Arm-side locking part 213 Arm-side abutting part 241, 242 Side surface 243 Recess 244 Protrusion 271 Side surface 275 Inclined convex part 275A Inclined surface 275B Surface 311 Rotation axis 321 Worm 322 Worm wheel 323 Gear 324 Gear (pinion) 325 Rack 331 Pushing bar

Claims

1. A lock unit comprising an electronic lock and a door guard, a case attached to the indoor side of the door, a rotation axis of the door guard attached to be relatively movable with respect to the case, an arm of the door guard that rotates in a first direction about the rotation axis to be in a locked state and rotates in a second direction to be in a locked - released state, a case - side locking portion provided on the case, which engages with the arm in the locked state and restricts the rotation of the arm in the second direction, support means for supporting the rotation axis, driving means capable of moving the rotation axis so as to be separated from the case - side locking portion, first biasing means for biasing the rotation axis so as to be close to the case - side locking portion, second biasing means for biasing the arm to rotate in the second direction, control means, communication means, and having, the first biasing means is means for applying a biasing force to the support means, the driving means is means for moving the support means based on the emergency unlocking signal, the control means performs control to unlock the electronic lock based on an emergency unlocking signal received via the communication means, and controls the driving means to perform a locking - release operation of moving the rotation axis away from the case - side locking portion, A lock unit characterized by the above.

2. The arm has an arm - side locking portion and an arm - side abutting portion, the case has a case - side abutting portion, in the locked state, the arm - side locking portion engages with the case - side locking portion, in the locked - released state, the movement of the rotation axis by the first biasing means is restricted by the arm - side abutting portion coming into contact with the case - side abutting portion, The lock unit according to claim 1, characterized by the above.

3. The arm - side locking portion and the arm - side abutting portion are provided at adjacent positions, the case - side locking portion and the case - side abutting portion are provided at adjacent positions, when the arm - side abutting portion and the case - side abutting portion are separated by the rotation of the arm in the first direction, the arm - side locking portion and the case - side locking portion are configured to be close to each other, The lock unit according to claim 2, characterized by the above.

4. In the normal unlocking operation, the control means performs control to unlock the electronic lock based on a normal unlocking signal received via the communication means, while not performing control to put the arm in the locked - released state. The tablet unit according to any one of claims 1 to 3, characterized in that...

5. In the locking operation, the control means locks the electronic lock based on the locking signal received via the communication means, while not performing control to lock the arm. The tablet unit according to any one of claims 1 to 4, characterized in that...

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