JP7689717B2 - Lock unit - Google Patents

Description

The present invention relates to a lock unit.

Conventionally, door guards have been known as one type of security equipment used in conjunction with a lock on a front door. In addition, with the spread of electronic locks, technology has become known that allows door guards to be locked and unlocked (locked and unlocked) in addition to operating the electronic lock from outside when going out (see, for example, Patent Document 1).

JP 2005-36488 A

However, while a configuration that allows the door guard to be locked from outside the room is certainly effective as a double measure of security when the owner is away, it also means that the door guard can be unlocked from outside as part of everyday (normal) operations, and in this respect it cannot be said to provide a high level of security. In other words, it is desirable for the door guard to be configured so that it can be locked/unlocked only from inside the room.

On the other hand, there is another point of view in the case of an emergency. That is, if a resident needs rescue while in the room with the door guard locked, and the resident is unable to release the door guard by himself, the door cannot be opened easily even if a rescuer unlocks it with a duplicate key, and rescue may be impossible or may take a long time.

There is thus a need for the development of a door guard that satisfies the conflicting demands of maintaining high security while also being able to quickly release the lock in an emergency.

The present invention was made to solve these problems in the past, and aims to provide a lock and door guard lock unit that maintains high security while allowing for rapid release of the lock in an emergency.

The present invention is a lock unit comprising an electronic lock and a door guard, the lock unit comprising: a case attached to the interior side of a door; a rotation shaft of the door guard attached to be movable relative to the case; an arm of the door guard that rotates about the rotation shaft in a first direction to be in a locked state and rotates in a second direction to be in an unlocked state; a case side locking part provided on the case that engages with the arm in the locked state and restricts the rotation of the arm in the second direction; a support means for supporting the rotation shaft; and a drive means capable of moving the rotation shaft so as to be away from the case side locking part. the electronic lock locking device further includes a first biasing means for biasing the rotating shaft so as to approach the case side locking portion, a second biasing means for biasing the arm so as to rotate in the second direction, a control means, and a communication means, the first biasing means being a means for applying a biasing force to the support means, the drive means being a means for moving the support means based on the emergency unlocking signal, and the control means controlling the electronic lock to unlock based on the emergency unlocking signal received via the communication means, and controlling the drive means to perform a lock release operation for moving the rotating shaft away from the case side locking portion,
The present invention relates to a lock unit characterized by the above-mentioned.

The lock unit of the present invention has the excellent effect of being able to quickly release the lock in an emergency while maintaining high security.

1A to 1C are diagrams showing an example of installation of the lock unit according to this embodiment, in which (A) is an oblique view, (B) is an oblique view, and (C) is a top view. FIG. 2 is a perspective view illustrating a door guard unit according to the embodiment. FIG. 2 is a perspective view illustrating a door guard unit according to the embodiment. 1A to 1D are diagrams illustrating a door guard unit according to the present embodiment, in which (A) is a front view, (B) is a perspective view, (C) is a rear view, and (D) is a perspective view. FIG. 2 is a perspective view illustrating a door guard unit according to the embodiment. 13 is a table explaining the operation of the lock unit according to this embodiment. A diagram showing an overview of a locking/unlocking system that employs the lock unit of this embodiment. An oblique view explaining the operation of the lock unit in this embodiment. An oblique view explaining the operation of the lock unit in this embodiment. An oblique view explaining the operation of the lock unit in this embodiment.

The lock unit 1 according to this embodiment will be described in detail below with reference to the drawings.

<Overall composition>
The overall configuration of the lock unit 1 according to this embodiment will be described with reference to Fig. 1. Fig. 1(A) and Fig. 1(B) are external perspective views of an example of installation of the lock unit 1 according to this embodiment as seen from the inside of the room, and Fig. 1(C) is a top view.

As shown in Figures 1(A) to 1(C), the lock unit 1 of this embodiment has a lock case (lock device) 50 that is installed inside a door DR such as the entrance or room of a living room (residence), a case (indoor case) 10 that is attached to the indoor side of the door DR, and a case (outdoor case 60) that is attached to the outdoor side of the door DR.

The exterior case 60 is equipped with an electronic lock (electric lock) 64, and the interior case 10 has a thumb turn 11 and a door guard unit 20U.

This lock unit 1 can extend or retract the deadbolt 52 of the lock case 50 by locking or unlocking the electronic lock 64 from the outside of the room, or by locking or unlocking the thumb turn 11 from the inside of the room. The configuration of the electronic lock 64 is similar to that of a conventionally known configuration, so it will be described briefly here.

As shown in FIG. 1(C), when the electronic lock 64 or thumb turn 11 is shifted from an unlocked state to a locked state, the deadbolt 52 protrudes from the end of the door DR and fits into a strike (recess) provided in the entrance or room, etc., to enter a locked state, and the door DR enters a locked state. On the other hand, when the electronic lock 64 or thumb turn 11 is shifted from a locked state to an unlocked state, the deadbolt 52 retreats from the strike into the lock case 50 to enter an unlocked state, and the door DR enters an unlocked state. Although not shown in the figure, a latch that allows for temporary locking is provided vertically above (or below) the deadbolt 52 of the lock case 50.

Although not shown in the figure, an exterior handle is provided on the exterior side and an interior handle is provided on the interior side, and the temporary locking by the latch of the lock case 50 can be released by pulling the exterior handle (pulling the exterior handle towards you) or pushing the interior handle from the interior side (pushing the interior handle towards the back). Specifically, when the exterior handle or interior handle is not being operated, the latch is biased by a spring and fits into the strike, and is restricted from retracting into the lock case 50, so that the door DR is temporarily locked by the latch. On the other hand, when the exterior handle is pulled or the interior handle is pushed, the latch can retract into the lock case 50, becoming unlocked, and if the deadbolt 52 is unlocked, the door DR can be opened.

In this example, the latch is configured to release the temporary lock when the exterior handle is pulled or the interior handle is pushed, allowing the door DR to open to the exterior side; however, the present invention is not limited to this, and the latch may be configured to release the temporary lock when the exterior handle is pushed or the interior handle is pulled, allowing the door DR to open to the interior side. The lock unit 1 may be a right-handed lock device or a left-handed lock device.

The lock unit 1 further has a control means 15 that controls each component of the lock unit 1, and a communication means 16 that transmits and receives signals to and from the outside (Fig. 1C). The control means 15 is composed of a CPU, RAM, ROM, etc., and executes various controls. The control means 15 may be provided integrally with the lock unit 1 or may be separate. The communication means 16 may be provided integrally with the lock unit 1 or may be separate.

The configuration of the lock case 50 is similar to that of the conventionally known configuration, so a detailed description will be omitted, but the lock case 50 houses a deadbolt drive unit that can set the deadbolt 52 to a locked or unlocked state, and a latch drive unit that can set the latch to a provisionally locked or unlocked state.

The electronic lock 64 performs locking and unlocking operations upon receiving a signal. In this embodiment, the signals used by the electronic lock 64 are a locking signal, a normal unlocking signal, and an emergency (emergency) unlocking signal. The electronic lock 64 performs a locking operation upon receiving a locking signal. It also performs an unlocking operation upon receiving a normal unlocking signal and an emergency unlocking signal.

The locking signal is a signal that is sent based on, for example, a locking operation by an operator (a user of the room, a resident), and is a signal that includes a secret number (locking number) for locking the electronic lock 64. The normal unlocking signal is a signal that is sent based on a normal unlocking operation by an operator under normal circumstances, and is a signal that includes a secret number (normal unlocking number) for unlocking the electronic lock 64. The emergency unlocking signal is a signal that is sent based on an emergency unlocking operation by, for example, another operator (a third party other than the resident), and is a signal that includes a secret number (emergency unlocking number) for emergency unlocking the electronic lock 64.

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

In addition to (or instead of) the above operations, the normal unlocking operation, and the emergency unlocking operation, if 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 possible by operating the input means (such as inputting numbers or touching a mobile terminal). In the following, this embodiment will be described mainly using as an example a case where the locking and unlocking operations are performed by a locking and unlocking application on a mobile terminal.

The locking operation is, for example, tapping the lock button or inputting the lock number in the locking/unlocking application. The normal unlocking operation is, for example, tapping the normal unlock button or inputting the normal unlock number in the locking/unlocking application. When using a lock number or normal unlock number, it is desirable that the operator be able to set or change them as desired.

In contrast, the emergency unlocking operation is, for example, tapping the emergency unlocking button in the locking/unlocking application or inputting an emergency unlocking number. When using an emergency unlocking number, it is desirable that the number be, for example, a preset unique value (such as "0119"). Note that the emergency unlocking number is not limited to a single value (such as "0119"), but may be selected and set from multiple predetermined unique values (such as "0119" and "0911").

The lock unit 1 also has a door guard 20 on the interior side that has an arm 21 and a receiving member 23.

<Door guard unit>
The door guard unit 20U will be described with reference to Figures 2 to 5. In the following figures, the main parts necessary for the description are extracted or shown in perspective. Figure 2 is a diagram for explaining the door guard unit 20U, in which (A) shows the main parts of the door guard unit 20U in the locked state, (B) shows the main parts of the door guard unit 20U in the unlocked state, (C) is an enlarged view of (A), and (D) is a diagram between the locked state and the unlocked state (during state transition), all of which are perspective views seen from the inside of the room.

Referring to FIG. 2(A), the lock unit 1 of this 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 rotating shaft (arm rotating shaft 22), a support means 24, and a drive means 30. In normal operation, the lock unit 1 can only lock and unlock the door guard 20 (the arm 21) 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 lock unit 1 receives an emergency (emergency) unlocking signal (for example, the same signal as the emergency unlocking signal of the electronic lock 64), and unlocking is possible. In this embodiment, for example, the door guard 20 (the arm 21) can be unlocked in an emergency even if the operator is in a remote location.

The arm 21 is a generally U-shaped locking fitting with one longitudinal end being an open end, and is configured to be rotatable around the arm rotation shaft 22 that is inserted into the open end. As shown in Figures 1(C) and 2(A), the arm 21 rotates around the arm rotation shaft 22 in a first direction R1 and engages with a receiving member (locking pestle) 23 provided on the door frame DF on the interior side, thereby becoming locked. The arm 21 also rotates in a second direction R2 and moves away from the receiving member 23, thereby becoming unlocked. The door guard 20 is made up of the arm 21, the arm rotation shaft 22, and the receiving member 23.

2(B) and 2(C), the arm rotation shaft 22 has an axial direction extending vertically, and is supported by a support means 24 and attached to the indoor case 10 so as to be movable relative to the indoor case 10. More specifically, the support means 24 is a substantially rectangular member that is elongated in the longitudinal direction (horizontal direction) of the arm 21, and the arm rotation shaft 22 is inserted into one longitudinal end of the support means 24. 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 in the vertical direction so as not to fall off. The arm 21 is rotatable relative to the support means 24 in a first direction R1 and a second direction R2.

The support means rotation shaft 25 is inserted into the other end of the support means 24 in the longitudinal direction. The support means rotation shaft 25 also extends vertically, 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. This allows the support means 24 to rotate in the third direction R3 and the fourth direction R4 around the support means rotation shaft 25. 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 opposite direction to the third direction R3 and the direction in which the arm rotation shaft 22 moves away from the door DR (Figures 2(C), 2(D), and 1(C)). With this configuration, the arm rotation shaft 22 is movable relative to the indoor case 10. Specifically, it can move in the third direction R3 approaching the door DR and the fourth direction R4 moving away from the door DR within the indoor case 10.

The support means 24 has two opposing side surfaces 241, 242, and is accommodated in the indoor case 10 so 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 (FIGS. 1(C), 2(A), and 2(C)). A first biasing means 26 is provided in the vicinity of the arm rotation axis 22 on the other side surface 242 (FIGS. 2(B) and 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 in the side surface 242, with one end of the coil winding abutting the recess 243 and the other end abutting the inner wall 101 of the indoor case 10 (FIG. 2(A)). This first biasing means 26 constantly biases the support means 24 to rotate in the third direction R3, and as a result, the arm rotation shaft 22 is constantly biased in a direction approaching the door DR (to move in the third direction R3).

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 (in the direction of unlocking). The second biasing means 27 is, for example, a torsion spring, which is mounted on the arm rotation shaft 22 protruding from the upper surface of the support means 24 and disposed between the arm 21 and the support means 24, with one end fixed to a protrusion 244 provided on the upper surface of the support means 24 and the other end fixed to a recess 211 provided in the inner wall of the arm 21.

In addition, the arm 21 of this embodiment engages with a part of the indoor case 10. As shown in FIG. 2(C), the head 21H of the arm 21 (the insertion area of the arm rotation shaft 22) has a generally circular (or elliptical) shape in plan view, but a part of the circumferential surface of the head 21H has a step 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). In other words, the head 21H includes a large diameter region 21HB having a long radial length and a small diameter region 21HS having 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. The step 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 abutment portion 213.

Figure 3 is a perspective view of the upper part of the indoor case 10, as seen from the inside of the room. The arm 21 has been omitted from Figure (A). The indoor case 10 has the arm 21 rotatably arranged on its top surface 102. A partition wall portion 111 that protrudes vertically upward is provided between the arm 21 on the top surface 102 and the door DR. Partition wall portion 111 is formed in a shape that fits along the head portion 21H of arm 21. That is, near the head portion 21H, a stepped case side locking portion 112 that protrudes toward the arm 21, and a case side abutment portion 113 that is adjacent (continuous) to this, are formed.

The case side locking portion 112, as shown in Fig. 1D and Fig. 1E, engages with the arm 21 in the locked state and restricts the rotation of the arm 21 in the second direction R2, and has a shape that can sufficiently lock (engage) with the arm side locking portion 212. Also, as shown in Fig. 1B, the case side abutment portion 113 has, for example, a curved shape that can abut with the arm side abutment portion 213 in the unlocked state.

That is, when the arm 21 is in the unlocked state as shown in FIG. 1B, the case-side abutment portion 113 and the arm-side abutment portion 213 abut against each other. When the arm 21 rotates in the first direction R1 as shown in FIG. 1C, the head portion 21H slides in a direction in which the case-side abutment portion 113 and the arm-side abutment portion 213 move away from each other, creating a gap between the case-side abutment portion 113 and the head portion 21H facing the case-side abutment portion 113, and the case-side locking portion 112 adjacent to the case-side abutment portion 113 and the arm-side locking portion 212 adjacent to the arm-side abutment portion 213 come close to each other, so that the case-side locking portion 112 and the arm-side locking portion 212 can engage with each other (FIG. 1C, FIG. 1D).

To explain further, in the unlocked state shown in FIG. 1B, the support means 24 is biased by the first biasing means 26 to rotate in the third direction R3 around the support means rotation axis 25, and as a result, the arm rotation axis 22 is biased to approach the case side locking portion 112, but the case side abutment portion 113 and the arm side abutment portion 213 abut against each other, restricting the rotation of the support means 24 in the third direction R3.

When the operator rotates the arm 21 in the first direction R1 against the biasing force of the second biasing means 27 from this state, the case side abutment 113 and the arm side abutment 213 slide relative to each other, and a gap is created between the case side abutment 113 and the opposing head 21H (FIG. 1C). This releases the restriction on the rotation of the support means 24 in the third direction R3. Here, the support means 24 is subjected to the biasing force of the first biasing means 26, and when the force in the third direction R3 of the operator's holding force of the arm 21 becomes smaller than the biasing force of the first biasing means 26, the support means 24 rotates in the third direction R3 due to 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.

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 (FIG. 8(D)). As a result, even if the operator releases the grip of the arm 21, the arm 21 remains in an upright position, and is locked to the receiving member 23 (not shown) (see FIG. 8(C)).

In this manner, in this embodiment, the arm 21 is maintained in an engaged state by the engagement between the case side engaging portion 112 and the arm side engaging portion 212. That is, the second biasing means 27 restricts the rotation of the arm 21 in the second direction R2 (FIG. 1(D)). In other words, the operator loosens the holding force of the arm 21 between FIG. 1(C) and FIG. 1(D), but supports the arm 21 or holds the arm 21 as described above and (slightly) pushes the arm 21 in the third direction R3 so that the arm 21 does not rotate in the second direction R2.

On the other hand, in the unlocked state (FIG. 1B), the arm side abutment portion 213 comes into contact with the case side abutment portion 113, restricting the movement of the arm rotation shaft 22 in the third direction R3 by the first biasing means 26.

Next, the driving means 30 will be described with reference to Figs. 4 and 5. Figs. 4(A) and 4(B) are diagrams showing the door guard unit 20U when the driving means 30 is not driven, with Fig. 4(A) being a front view seen from the room side and Fig. 4(B) being a perspective view seen from the door DR side. Figs. 4(C) and 4(D) are diagrams showing the door guard unit 20U when the driving means 30 is driven, with Fig. 4(C) being a front view seen from the room side and Fig. 4(D) being a perspective view seen from the door DR side. Figs. 5(A) to 5(C) are diagrams showing the door guard unit 20U when the driving means 30 is driven, and are perspective views seen from the door DR side. Fig. 5(D) is a perspective view showing the head 21H of the arm 21 in the locked state from the room side.

For ease of explanation, in the explanation of this diagram, the vertical direction (the up and down direction in FIG. 4(A)) is referred to as the height direction H of the support means 24, the direction perpendicular to the height direction H and parallel to the surface of the door DR is referred to as the width direction W of the support means, and the direction perpendicular to the height direction H and the width direction W is referred to as the thickness direction D of the support means 24.

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

As shown in Fig. 4(A) and (B), the driving means 30 is fixed to the inner wall of the indoor case 10 below the support means 24, for example, and has a motor 31, a power conversion means 32 that converts the rotational power of the motor 31 into linear power, and a slider 33 that is 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 consisting of a worm wheel 322, a gear 323 and a gear (pinion) 324, 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 via a 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.

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 (height direction H of the support means 24). As a result, when the motor 31 rotates, the slider 33 reciprocates horizontally (width direction W of the support means 24, left and right direction in the figure).

As shown in FIG. 4B, a sloping protrusion 275 is provided on the side surface 271 of the support means 24 facing the door DR. The sloping protrusion 275 is a protrusion having a generally truncated pyramid shape, and includes a sloping surface 275A that slopes so that the height (height in the thickness direction D of the support means 24) increases from the support means rotation shaft 25 side toward the arm rotation shaft 22 side, and a pushing surface 275B that is connected to the sloping surface and is generally parallel to the side surface 271 of the support means 24. The pushing surface 275B is provided at a position where the surface (front surface) of the pushing bar 331 abuts when the slider 33 is closest to the arm rotation shaft 22.

The slider 33 moves back and forth horizontally (the width direction W of the support means 24) from the initial position to the push-out position. As shown in (A) and (B) of the same figure, the initial position is a position where the push-out 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-out bar 331 abuts or is close to the side surface 271 of the support means 24, and the push-out position is a position where the surface (front surface) of the push-out bar 331 abuts against the push-out surface 275B of the inclined convex portion 275, as shown in (C) and (B) of the same figure.

When the motor 31 rotates while the slider 33 is in the initial position (FIG. 1A, 1B), the slider 33 starts to move from the initial position via the power conversion means 32. This causes the push-out bar 331 to ride up onto the inclined convex portion 275, where the biasing force of the first biasing means 26 is set to be smaller than the force pushing out the support means 24 due to the horizontal movement of the slider 33. As a result, the push-out bar 331 slides on the inclined surface 275A against the biasing force of the first biasing means 26 (FIG. 1C) and reaches the push-out surface 275B. As a result, the support means 24 is pushed out into the room and rotates in the fourth direction R4 around the support means rotation axis 25 (FIG. 1D). Then, by rotating the support means 24 in the fourth direction R4, the arm rotation shaft 22 supported by it moves in a direction away from the door DR, i.e., away from the case side locking portion 112, and the arm side locking portion 212 and the case side locking portion 112 are disengaged (FIG. 2(D)). In other words, the height of the inclined convex portion 275 (height in the thickness direction D of the support means 24) is set higher than the radial length L of the plane that constitutes the arm side locking portion 212 (see FIG. 2(C)).

As shown in FIG. 5(A), when the arm side locking portion 212 and the case side locking portion 112 are disengaged and the arm 21 is not being held by the operator, the arm 21 rotates in the second direction R2 due to the biasing force of the second biasing means 27. Then, the arm 21 is released from the receiving member (not shown here), and the door guard 20 is in an unlocked state as shown in FIG. 5(B).

The door guard unit 20U further has a detection means (e.g., a sensor or a pulse counter, etc.) not shown, and when the detection means detects that the slider 33 has reached the push-out position, the driving means 30 moves the slider 33 to the initial position (FIG. 1C). When the slider 33 moves to the initial position, the push-out bar 331 also releases the push-out of the support means 24. This again applies the biasing force of the first biasing means 26 to the support means 24, and the support means 24 rotates in the third direction R3 around the support means rotation axis 25, returning to the state before the push-out. The rotation of the support means 24 in the third direction R3 is restricted and stopped at a predetermined position by the abutment of the arm side abutment portion 213 and the case side abutment portion 113 (FIG. 1D).

The above describes the operation of unlocking the arm 21 by the driving means 30, but this is only performed when an emergency unlocking signal is received. In other words, in this embodiment, unlocking of the arm 21 is performed manually under normal circumstances. The following description will be given assuming that the driving means 30 is not operating (the slider 33 is in the initial position) in Figures 4 and 5. The operator holds the arm 21 and pulls it back toward the inside of the room as shown in Figure 4 (D). At this time, the arm 21 is pulled back at least until it exceeds the height of the inclined convex portion 275.

As a result, the support means 24 rotates in the fourth direction R4 around the support means rotation shaft 25. Then, due to the rotation of the support means 24, the arm rotation shaft 22 supported by it moves in a direction away from the door DR, i.e., away from the case side locking portion 112, and the arm side locking portion 212 and the case side locking portion 112 are disengaged.

When the operator releases the arm 21 with the arm side locking portion 212 and the case side locking portion 112 disengaged as shown in FIG. 5(A) (the operator may rotate the arm 21 slightly in the second direction R2), the door guard 20 enters an unlocked state 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, similar to the movement by the drive means 30, the support means 24 rotates in the third direction R3 to return to the state before being pushed out, and is stopped at a predetermined position by the abutment of the arm side abutment portion 213 and the case side abutment portion 113 (FIG. 5(D)).

<Locking and unlocking operation of the lock unit>
The locking and unlocking operation of the lock unit 1 of this embodiment will be specifically described with reference to Figures 6 to 10. Figure 6 is a table showing whether the thumb turn 11 of the lock unit 1 can be locked or unlocked and whether the door guard 20 can be locked or locked.

First, the lock unit 1 of this embodiment allows rescuers to enter the room from outside if the first operator, the user (resident) of the room, becomes in need of rescue while in the room. In other words, the following operations are not anticipated in an emergency: locking the thumb turn 11 from inside and outside the room, locking the door guard 20 from inside and outside the room, unlocking the thumb turn 11 from inside the room, or releasing the door guard 20 from inside the room (common sense tells us there is no need to anticipate these).

That is, in terms of locking and engaging operations under normal circumstances, it is possible to lock the thumb turn 11 and engage the door guard 20 from inside the room. Also, under normal circumstances, it is possible to lock the thumb turn 11 (electronic lock 64) by receiving a locking signal via the communication means 16 based on the operation of the electronic lock 64 from outside the room. On the other hand, under normal circumstances, it is not possible to engage the door guard 20 from outside the room.

Next, regarding the unlocking and disengaging operations, firstly, under normal circumstances it is possible to unlock the thumb turn 11 and disengage the door guard 20 from inside the room. Also, under normal circumstances it is possible to unlock the thumb turn 11 (electronic lock 64) by receiving an unlocking signal via the communication means 16 based on the operation of the electronic lock 64 from outside the room. On the other hand, under normal circumstances it is not possible to disengage the door guard 20 from outside the room.

In an emergency, it is possible to unlock the thumb turn 11 (electronic lock 64) by receiving an emergency unlocking signal via the communication means 16 based on the operation of the electronic lock 64 from outside the room. In addition, it is possible to unlock the door guard 20 from outside the room by receiving an emergency unlocking signal via the communication means 16. This is explained in detail below.

Figure 7 is a schematic diagram showing an example of a locking/unlocking system 200 that allows the locking/unlocking operation of the lock unit 1 to be performed remotely. The lock unit 1 of this embodiment can be applied to such a locking/unlocking system.

The locking/unlocking system 200 is composed of, for example, the above-mentioned lock unit 1 and a communication line 201 that is communicatively connected to it, a mobile terminal 202 held by a first operator, i.e., resident A of the room (such as a house) in which the lock unit 1 is installed, a mobile terminal 203 held by a second operator, i.e., a related person B of resident A (a related person such as a family member living together or a family member living separately), and a server device (cloud server device) 204. In this case, the control means 15 of the lock unit 1 may be provided in the server device 204. There may be three or more operators.

The mobile terminals 202, 203 are each a portable terminal (such as a smartphone or tablet terminal) on which the locking/unlocking application AP for the locking unit 1 is installed, and the locking/unlocking application AP enables normal locking/unlocking operations and emergency unlocking operations. The locking unit 1 of 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.

When a 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 that includes a PIN number (locking number) for locking the electronic lock 64. The locking number can be set or changed as desired by the operator. A conventionally known method can be used for this locking operation.

In addition, when a 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 receiving this performs the unlocking operation of the electronic lock 64. The unlocking signal is a signal that includes a secret number (normal unlocking number) for unlocking the electronic lock 64. The normal unlocking number can be set or changed as desired by the operator. Conventionally known methods can be used for this unlocking operation.

In addition to these, the locking/unlocking application AP of this embodiment can send a notification (e.g., a push notification) to the second operator (related person) B that rescue is required based on a one-click operation by a first operator (resident, person in need of rescue) A who needs rescue as an emergency operation. In addition to this, an emergency unlocking signal can be transmitted from the mobile terminal 202 of the person in need of rescue A to the lock unit 1. Also, based on an emergency unlocking operation from the mobile terminal 203 of the related person B who has determined that rescue is required for the person in need of rescue A, an emergency unlocking signal can be transmitted from the server device 204 to the lock unit 1. The emergency unlocking signal is a signal that includes a PIN (emergency unlocking number) for emergency unlocking the electronic lock 64, and is a fixed value (e.g., "0119"). In this case, it is preferable that the control means 15 performs a locking operation after a predetermined time (e.g., one hour) has elapsed since the emergency unlocking operation.

The communication line 201 is a general term for a line that can transmit a locking signal and an unlocking signal in normal and emergency situations to the communication means 16 of the lock unit 1 based on various operations by the first operator A and/or the second operator B, and may be any type, whether wired or wireless. For example, in the case of wireless, it may be a communication line using other methods or standards such as a mobile communication network or a wireless LAN system, or a low-power (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), and a communication line constructed by a gateway, etc., or a line in which a communication path is formed by a plurality of these lines. In other words, in this embodiment, when operators A and B perform the locking/unlocking operation, they can do so whether they are in close proximity to the door DR or in a remote location.

In addition to the above-mentioned locking/unlocking system 200 (instead of or in addition to the above-mentioned method), a locking signal or an unlocking signal may be sent by operating a button on an electronic key near the door DR. Also, for example, the outdoor case 60 of the lock unit 1 may include an input means (such as an operation button or a touch panel), and a locking signal or an unlocking signal may be sent by operating the input means (predetermined button operation, inputting a locking number or an unlocking number, or touching a mobile terminal, etc.). In the case where the door can be unlocked by inputting the unlocking number, for example, in an emergency, the operator B may verbally convey the emergency unlocking number (such as "0119") to the rescuer C (such as a rescuer), and the emergency unlocking operation may be performed based on the rescuer C's input of the emergency unlocking number. In this case, it is preferable that the emergency unlocking number is invalid (unable to unlock) after a predetermined time has passed (such as after one hour) (the rescuer C is also informed that the number is time-limited).

Alternatively, a time-limited passcode (one-time password) may be issued as an auxiliary emergency unlocking number based on the input operation of the emergency unlocking number by rescuer C, and displayed on a display means, and the emergency unlocking operation of lock unit 1 may be performed by inputting the passcode. In other words, in this case, the auxiliary emergency unlocking number (time-limited passcode) is also included in the "emergency unlocking number" of this embodiment.

<<Normal interior locking operation>>
FIG. 8 is a perspective view showing the lock unit 1, illustrating the locking and locking operation from the inside of the room under normal circumstances and the locking and locking action of the lock unit 1 based on that operation.

Figure 7 (A) shows the case where the thumb turn 11 is in an unlocked state and the door guard 20 (arm 21 and receiving member 23) is in a disengaged state. To lock the thumb turn 11 from inside the room in this state, an operator (such as a resident) inside the room rotates the thumb turn 11 in a specified direction (counterclockwise in Figure 7) as shown in Figure 7 (B). This causes the deadbolt 52 to protrude from the end of the door DR and engage with the strike (recess), locking the door DR.

In addition, in this example, the door guard 20 has an arm accommodation groove 210 on the surface of the indoor case 10. When the door guard 20 is in an unlocked state, the arm 21 falls (folds) so as to be parallel to the surface of the door DR as shown in FIG. 3A, and is accommodated in the arm accommodation groove 210. The support means 24 is always biased by the first biasing means 26 to rotate in the third direction R3, but when the door guard 20 is in an unlocked state, the case side abutment portion 113 and the arm side abutment portion 213 abut, and movement of the support means 24 in the third direction R3 is restricted (see FIG. 3B).

When the door guard 20 in such an unlocked state is to be locked from inside the room, the operator holds the arm 21 and rotates it in the first direction R1 as shown in FIG. 7C so that it stands up against the door DR. The rotation of the arm 21 causes the case-side abutment portion 113 and the arm-side abutment portion 213 to move relatively apart (FIG. 3B), and the separation of the two releases the restriction on the rotation of the support means 24 in the third direction R3. When the force exerted by the operator in the third direction R3 among the holding force of the arm 21 becomes smaller than the biasing force of the first biasing means 26, the biasing force of the first biasing means 26 causes the support means 24 to rotate in the third direction R3. This brings the arm rotation shaft 22 close to the case-side locking portion 112, and the case-side locking portion 112 and the arm-side locking portion 212 engage with each other, so that the arm 21 and the receiving member 23 (the door guard 20) are locked (FIG. 3D). Although the arm 21 is constantly biased in the second direction R2 (the direction in which the arm 21 is released from the lock) by the second biasing means 27, the case side locking portion 112 and the arm side locking portion 212 engage with each other, thereby maintaining the locked state (locked) (Figures 8(C), 3(E)).

As described above, according to this embodiment, when the arm 21 is manually raised, the arm rotation shaft 22 moves due to the biasing force of the first biasing means 26 (the arm 21 itself moves in the direction pushed from the inside of the room), and the arm 21 is held in an upright state (locked state) by the engagement between the case side locking part 112 and the arm side locking part 212. A biasing force in a direction to tilt the arm 21 (release the lock) is applied by the second biasing means 27, but the locked state of the arm 21 is maintained by physical contact (engagement) between the case side locking part 112 and the arm side locking part 212.

Here, for example, consider a configuration in which the second biasing means acting in a direction to tilt the arm (to release the lock) and the first biasing means acting in a direction to hold the arm in an upright state act directly on the arm at the same time. Specifically, the arm is held in the locked state by balancing the opposing biasing forces of the first and second biasing means. In this case, it is necessary to appropriately adjust the balance of the two biasing forces, which causes problems such as the cost of the parts (each spring) themselves and the complexity of the manufacturing process. In addition, the biasing force of the spring decreases due to aging, and the operation becomes slow due to wear of each part, so it may become difficult to hold the arm in an upright state. In other words, a configuration that relies on the balance of opposing biasing forces is not desirable from the viewpoint of durability.
In other words, the arm 21 can be reliably held in the upright state without strictly adjusting the balance between the biasing force of the first biasing means 26 and the biasing force of the second biasing means 27 .

In contrast, this embodiment has a configuration including a second biasing means 27 that acts in a direction to tilt (unlock) the arm 21, and a first biasing means 26 that acts in a direction to hold (lock) the arm in an upright position (to press the support means 24 against the inner surface of the indoor case 10), but the locked state of the arm 21 is maintained by physical contact (engagement) between the case side locking portion 112 and the arm side locking portion 212. In other words, there is no need to rely on a balance between the opposing biasing forces of the first biasing means 26 and the second biasing means 27, and problems due to deterioration over time can be avoided, and the arm 21 can be reliably held in an upright position.

<<Normal exterior locking operation>>
Next, the operation of locking the thumb turn 11 from outside the room when the thumb turn 11 is in an unlocked state and the door guard 20 (the arm 21 and the receiving member 23) is in a disengaged state will be described. This is a locking operation when going out normally. The operator closes the door DR and performs the locking operation of the electronic lock 64 from outside the room. This locking operation is similar to the operation of the known electronic lock 64, and here, a simple explanation will be given using an example of a configuration in which the locking and unlocking operation from outside the room can be performed using a mobile terminal held by the operator. 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 locking unit 1 is installed. Based on this, the server device 204 transmits a locking signal. When the communication means 16 of the locking unit 1 receives the locking signal transmitted via the communication line 201, the control means 15 controls the thumb turn 11, and in this example, rotates it counterclockwise to lock the door DR.

On the other hand, the door guard 20 does not operate due to the locking signal of this thumb turn 11. Also, in this example, the door guard 20 cannot be locked by operation from outside under normal circumstances. For example, there is no signal (locking signal) to lock the door guard 20, or even if the communication means 16 of the lock unit 1 receives some kind of signal, the control means 15 does not control the door guard unit 20U by that, i.e., it does not control the arm 21 to be locked. The door guard 20 remains in the unlocked state, and only the thumb turn 11 is locked (for example, the state in Figure 9 (B)).

<<Normal indoor unlocking operation>>
FIG. 8 is a diagram illustrating the normal unlocking and unlocking operation from inside the room and the unlocking and unlocking action of the lock unit 1 based on that, and is an oblique view of the lock unit 1 as seen from inside the room.

First, with the door guard 20 in the locked state as shown in FIG. 7(C), for example, an operator in the room rotates the thumb turn 11 in a predetermined direction (clockwise in FIG. 7). This causes the deadbolt 52 to be pulled into the end of the door DR, unlocking the door DR (FIG. 9(A)). When the thumb turn 11 is unlocked while the door guard 20 is in the locked state, the door DR can be opened by the length of the inner circumference of the arm 21 with the arm 21 and receiving member 23 engaged as shown in FIG. 9(A).

Next, the unlocking of the door guard 20 will be explained with reference to Figures 8(B) and 8(C). In both figures, the thumb turn 11 is in a locked state, but when operating from inside the room, the thumb turn 11 and the door guard 20 can be operated independently at the operator's discretion.

When the arm 21 is in the locked state, the arm 21 is biased in the second direction R2 (the direction in which the lock is released) by the second biasing means 27, but the locked state is maintained (locked) by the engagement between the case side locking portion 112 and the arm side locking portion 212.

To release this, the operator first holds the arm 21 and performs a retracting operation to retract it slightly toward the inside of the room (toward the operator) (see Fig. 9 (B) and Fig. 4 (D)). This causes the support means 24 to rotate in the fourth direction R4 against the biasing force of the first biasing means 26, and the case side locking portion 112 and the arm side locking portion 212 move away from each other, and the engagement between them is released (Fig. 5 (A)). The arm 21 is then folded by the biasing force of the second biasing means 27 (the operator may rotate the arm 21 slightly in the second direction R2 (folding direction)), and is accommodated in the arm accommodation groove 210, and is in an unlocked state (Fig. 9 (C), Fig. 5 (B), Fig. 5 (C)). As already mentioned, the retraction action by the operator from inside the room functions in the same way as the pushing action of the support means 24 by the slider 33 (push bar 331) shown in Figures 4 and 5 (the slider 33 does not move).

As described above, in this embodiment, the locked state of the arm 21 is maintained by physical contact (engagement) between the case side locking portion 112 and the arm side locking portion 212, and the arm 21 can be reliably maintained in an upright state without relying on a balance between the opposing biasing forces of the first biasing means 26 and the second biasing means 27. Therefore, to manually release the lock of the arm 21 from inside the room, a retracting operation is required, and by making this retracting operation a required configuration, crime prevention can also be improved.

For example, a resident may hold the door DR open while keeping the door guard 20 engaged for ventilation purposes (see FIG. 8(A)). In such a case, with a conventional door guard, there is a risk that the door guard could be illegally released for criminal purposes. Specifically, one method is to insert a hand from outside the room, hook an expandable member onto the tip of the door guard's arm, and pull the member to the outside while closing the door, thereby lowering the arm and illegally releasing the door guard. In contrast, in this embodiment, when releasing the door guard 20, the arm 21 must be retracted inside the room, preventing such illegal release.

In addition, the operation of the thumb turn 11 and the operation of the door guard 20 (particularly the locking operation and the engaging operation) may be linked only when the operation is performed from inside the room. For example, the door guard 20 may be (automatically) put into the engaged state by the control means 15 in conjunction with the locking operation of the thumb turn 11.

<<Normal outdoor unlocking operation>>
The unlocking operation of the thumb turn 11 from outside under normal circumstances is the same as the locking operation of the thumb turn 11 from outside described above, except that the signal sent to the lock unit 1 is a normal unlocking operation signal, so a detailed description will be omitted. That is, this is a normal unlocking operation when returning home, and when the operator performs an unlocking operation on the locking/unlocking application 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 sent via the communication line, the control means 15 controls the thumb turn 11, which in this example rotates clockwise to unlock the door DR.

On the other hand, the door guard 20 does not operate in response to the normal unlock signal of the thumb turn 11. In other words, the control means 15 does not control the arm 21 to be in an unlocked state. For example, even if one resident is in the room and the door guard 20 is in an locked state, and another resident is able to unlock the thumb turn 11 from outside the room using the normal unlock signal, the door DR cannot be fully opened due to the door guard 20 being locked.

＜＜External unlocking operation in emergency＞＞
Next, a description will be given of a case in which, in an emergency, an operation to unlock the thumb turn 11 and release the door guard 20 from outside the room is performed. For example, assume that a first operator (resident) A shown in Fig. 7 has locked the thumb turn 11 and locked the door guard 20, but is unconscious, unable to move, or otherwise unable to perform any operation in the room and in need of rescue.

In this state, the first operator (a resident in need of assistance, hereafter referred to as "person in need of assistance A") performs an emergency unlock operation of the locking/unlocking application AP on his/her mobile device 202 if possible. Based on this operation, the server device 204 transmits an emergency release signal. Based on this operation, the locking/unlocking application AP also notifies the authenticated second operator (hereafter referred to as person in need B) via the server device 204 that an emergency has occurred (e.g., by push notification, etc.).

In addition, if person B determines that emergency unlocking is necessary because the person in need of assistance is unable to perform the emergency unlocking operation and cannot be contacted, person B, for example, performs the emergency unlocking operation using a locking/unlocking application on his/her own mobile terminal 203.

When the communication means 16 of the lock unit 1 receives the emergency release signal transmitted via the communication line 201 by the emergency release operation by the person in need of rescue A and/or the person in charge B, the control means 15 controls the thumb turn 11, which in this example rotates it clockwise to unlock the door DR (Figure 9 (A)).

The control means 15 also controls the drive means 30 based on the (same) emergency unlocking signal received via the communication means 16 to perform the unlocking operation of the door guard 20.

Before receiving the emergency unlocking signal (i.e., under normal circumstances), the slider 33 of the driving means 30 does not move even if the door guard 20 is operated manually, i.e., the slider 33 is in the initial position (Figures 4 (A) and (B)). When the communication means 16 receives an emergency unlocking signal in this state, the control means 15 controls the driving means 30 to release the lock 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-out bar 331 slides on the inclined surface 275A against the biasing force of the first biasing means 26 (Figure 4 (C)) and reaches the push-out surface 275B. The support means 24 rotates in the fourth direction R4 around the support means rotation axis 25 and is pushed out into the room (Figure 4 (D)). This causes the arm rotation shaft 22 to move away from the case side locking portion 112, and the arm side locking portion 212 and the case side locking portion 112 are disengaged (FIG. 5(A)). The arm 21 rotates in the second direction R2 due to the biasing force of the second biasing means 27, and disengages from the receiving member 23, causing the door guard 20 to enter an unlocked state (FIG. 5(B)). When the detection means (not shown) of the door guard unit 20U detects that the slider 33 has reached the pushed-out position, the control means 15 causes the drive means 30 to move the slider 33 to the initial position (FIG. 5(C)).

This allows the door DR to be fully opened, allowing the rushing relevant party B to enter the room. Also, for example, if relevant party B is far away, rescuer C or someone else (who has received a report from relevant party) may arrive at the room first. Even in such a case, if the electronic lock 64 can be unlocked and the door guard 20 released by the operation of the person in need of assistance A himself or by remote operation by relevant party B, rescuer C who arrives first can provide immediate treatment without having to wait for the arrival of relevant party B.

In addition, in a configuration using the locking/unlocking application AP of the locking/unlocking system 200 described above, all locking and unlocking operations of the lock unit 1 can be performed using a single mobile terminal 202, 103, including in emergencies. Therefore, particularly with regard to unlocking operations in emergencies, there is no need to remember the type of key for emergency unlocking operations or a separately set PIN number. In other words, there is no risk of losing the key or forgetting the PIN number, and there is no need to wait for the arrival of someone who has the key, making it possible to respond quickly in an emergency.

In this way, according to this embodiment, the control means 15 unlocks the electronic lock 64 and unlocks the door guard 20 only when it receives an emergency unlocking signal transmitted from outside. This allows the door guard 20 to be unlocked quickly in an emergency while still maintaining high security.

In addition, in order to enable the door guard 20 to be released from the outside, a first biasing means 26 is provided that biases the arm rotation shaft 22 in a direction to push it toward the door DR so as to maintain the door guard 20 in an upright state, and a second biasing means 27 is provided that applies a biasing force in a direction to tilt the arm 21. 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 physical contact (engagement) between the case side locking portion 112 and the arm side locking portion 212. In other words, since the biasing force of the first biasing means 26 and the second biasing means 27 are not configured to directly act on the arm 21, there is no need to rely on the balance of the opposing biasing forces, and problems due to deterioration over time can be avoided and the arm 21 can be reliably maintained in an upright state.

Furthermore, to release the door guard 20 without using an emergency release signal, it is necessary to retract the arm 21 into the room to separate the case-side locking portion 112 from the arm-side locking portion 212. Therefore, the door guard 20 cannot be released using the tamper-evident methods used with conventional door guards, which is a concern with conventional door guards, and the crime prevention effect can be improved.

1 Lock 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 punch)
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 Lock case (lock device)
52 Deadbolt 60 Outdoor case 64 Electronic lock (electric lock)
101 Inner wall 102 Upper surface 111 Partition wall portion 112 Case side locking portion 112 Case side locking portion 113 Case side abutment portion 122 Case side locking portion 200 Locking/unlocking system 201 Communication lines 202, 203 Portable terminal 204 Server device (cloud server device)
210 Arm accommodating groove 211 Recess 212 Arm side locking portion 213 Arm side abutment portion 241, 242 Side surface 243 Recess 244 Projection portion 271 Side surface 275 Inclined convex portion 275A Inclined surface 275B Surface 311 Rotating shaft 321 Worm 322 Worm wheel 323 Gear 324 Gear (pinion)
325 Rack 331 Push-out bar

Claims (5)

A lock unit including an electronic lock and a door guard,
A case that can be attached to the inside of the door,
A rotation shaft of the door guard that is attached to the case so as to be movable relative to the case;
an arm of the door guard that rotates around the rotation axis in a first direction to be in a locked state and rotates in a second direction to be in an unlocked state;
a case side locking portion provided on the case, the case side locking portion engaging with the arm in a locked state and restricting the arm from pivoting in the second direction;
A support means for supporting the rotating shaft;
a driving means for moving the rotation shaft so as to move away from the case side locking portion;
a first biasing means for biasing the rotation shaft so as to approach the case side locking portion;
a second biasing means for biasing the arm so as to rotate in the second direction;
A control means;
A communication means;
the first biasing means is a means for applying a biasing force to the supporting means,
the driving means is a means for moving the supporting means based on the emergency unlocking signal,
The control means controls the electronic lock to be unlocked based on an emergency unlocking signal received via the communication means, and controls the drive means to perform an unlocking operation to move the rotation shaft away from the case side locking portion.
A lock unit characterized by: The arm has an arm side locking portion and an arm side abutment portion ,
The case has a case-side abutment portion,
In the locked state, the arm side locking portion engages with the case side locking portion,
In the unlocked state, the arm-side contact portion comes into contact with the case-side contact portion, thereby restricting the movement of the rotation shaft by the first biasing means.
A lock unit as claimed in claim 1. The arm side locking portion and the arm side abutment portion are provided at adjacent positions,
The case side locking portion and the case side abutment portion are provided at adjacent positions,
When the arm rotates in the first direction and the arm abutment portion and the case abutment portion are separated from each other, the arm side locking portion and the case side locking portion are configured to approach each other.
A lock unit as claimed in claim 2 . The control means controls the electronic lock to be unlocked based on a normal unlocking signal received via the communication means during a normal unlocking operation, but does not control the arm to be in an unlocked state.
A tablet unit according to any one of claims 1 to 3. The control means, in a locking operation, locks the electronic lock based on a locking signal received via the communication means, but does not control the arm to be in a locked state .
A tablet unit according to any one of claims 1 to 4.