Mortise lock, mortise lock system, door and method of mounting mortise lock

Abstract

To provide a box lock which can be easily mounted without an increase in size, and which enables noncontact locking and unlocking.SOLUTION: A latch bolt having a latch, a latch hub that pulls the latch into a casing, a lock unit that restricts movement of the latch hub, a drive unit that electrically drives the lock unit, a reception unit capable of receiving a locking signal and an unlocking signal according to a position of the latch by wireless communication, a control unit that drives the drive unit according to any one of the locking signal and the unlocking signal received by the reception unit, and a power supply unit are provided in the casing, The box lock can be attached as a new one in place of an existing box lock attached to a door having no thumb-turn.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a lock, a lock system, a door and a method for installing a lock. [Background technology]

[0002] With the aim of preventing key loss and improving convenience when unlocking, Patent Document 1 discloses a door lock that allows for contactless locking and unlocking of the door. The door lock disclosed in Patent Document 1 is equipped with a controller instead of a thumb turn, and an authenticating reading means housed in a main body case into which a cylinder lock is fitted is connected to the controller by a cable. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-007036 Summary of the Invention [Problem to be solved by the invention]

[0004] The door lock disclosed in Patent Document 1 is based on the premise that the existing door has a locking function, and therefore cannot be applied to indoor doors that have a box lock that switches the advance and retreat of the latch bolt by operating the door handle.

[0005] If an existing door has a locking function, using the door lock disclosed in Patent Document 1 requires the installation of a controller and a main body case, which increases the size of the door lock and reduces its appearance. In addition, the installation work becomes complicated as it requires the complicated task of connecting the reading means provided on the main body case to the controller with a cable.

[0006] The present disclosure has been made in consideration of the above points, and aims to provide a box lock, a box lock system, and a method for installing a door and a box lock that can be easily installed without increasing the size and that allows for contactless locking and unlocking. [Means for solving the problem]

[0007] A first aspect of the present disclosure is a box lock that can be installed as a new replacement for an existing box lock attached to a door that does not have a thumb turn, and that includes within the casing: a latch bolt having a latch; a latch hub that pulls the latch into a casing; a locking unit that restricts movement of the latch hub; a drive unit that electrically drives the locking unit; a receiving unit that can receive via wireless communication a locking signal and an unlocking signal corresponding to the position of the latch; a control unit that drives the drive unit in response to either the locking signal or the unlocking signal received by the receiving unit; and a power supply unit. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a door to which the box lock of the present disclosure is attached. FIG. [Figure 2] FIG. 2 is a diagram showing the internal configuration of the locking box according to the first embodiment of the present disclosure. [Figure 3] FIG. 2 is a diagram showing the internal configuration of the locking box according to the first embodiment of the present disclosure. [Figure 4] FIG. 10 is a diagram showing the internal configuration of a locking box according to a second embodiment of the present disclosure. [Figure 5] FIG. 10 is a diagram showing the internal configuration of a locking box according to a second embodiment of the present disclosure. [Figure 6] FIG. 2 is a control block diagram of the locking system of the present disclosure. [Figure 7] FIG. 10 is a perspective view showing a modified example of a door to which the box lock of the present disclosure is attached. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the box lock, box lock system, and door of the present disclosure will be described with reference to Figures 1 to 7. The following embodiments show one aspect of the present disclosure, do not limit the present disclosure, and can be modified as desired within the scope of the technical concept of the present disclosure. In the following drawings, the scale and number of each structure are different from the actual structure to make each configuration easier to understand.

[0010] As shown in FIG. 1, a new box lock 100 is detachably attached to a door 1 in place of an existing box lock (not shown). The door 1 is a hinged door, and does not have a locking function when the existing box lock is attached. The box lock 100 is attached by inserting it into a recess provided in a side surface 1a of the door 1. The box lock 100 is replaceable with respect to the door 1. A handle lever 2 is attached to the door 1. When the handle lever 2 is operated, a latch 11 of the door 1 extends and retracts from the side surface 1a of the door 1. When the door 1 is closed, the latch 11 protrudes from the side surface 1a of the door 1 and is inserted into a striker 3 of the door frame 5. When the latch 11 is inserted into the striker 3 of the door frame 5, the door 1 is maintained in a closed state.

[0011] As shown in FIG. 2, the locking box 100 of the first embodiment includes a casing 30, a latch bolt 10, a latch hub 20, a locking unit 40, a driving unit 50, a receiving unit 60, a control unit 70, a power supply unit 80, and a front panel 31.

[0012] The casing 30 houses the latch bolt 10, the latch hub 20, the locking unit 40, the driving unit 50, the receiving unit 60, the control unit 70, and the power supply unit 80. The lock box 100 is attached to the door 1 by inserting the casing 30 into a recess provided in the side surface 1a.

[0013] The latch bolt 10 is provided so as to be movable back and forth in the left-right direction in Fig. 2 relative to the casing 30. In the following description, the direction in which the latch bolt 10 moves back and forth is referred to as the left-right direction. The up-down direction in Fig. 2 is referred to as the up-down direction. The direction perpendicular to the left-right direction and the up-down direction in Fig. 2 is referred to as the thickness direction.

[0014] The latch bolt 10 is axially shaped and extends in the left-right direction. The latch bolt 10 has a latch 11, an engagement portion 12, and a pressing portion 13. The latch 11 is provided at the left end of the latch bolt 10. When the latch bolt 10 moves to the left, the latch 11 protrudes from the front plate 31 through an opening 31a in the front plate 31. The engagement portion 12 is located on the right side of the latch 11. The dimensions of the engagement portion 12 are larger than the dimensions of the opening 31a in the front plate 31. When the latch bolt 10 moves to the left, the engagement portion 12 engages with the front plate 31 from the right side. The position of the latch 11 protruding from the front plate 31 is determined by the engagement portion 12 engaging with the front plate 31 from the right side.

[0015] The pressing portion 13 is disposed to the right of a first arm portion 21 of the latch hub 20, which will be described later. A first spring 14 contacts the right side of the pressing portion 13. The first spring 14 is a compressed coil spring. The left side of the first spring 14 contacts the pressing portion 13, and the right side contacts the side wall 32 of the casing 30. The pressing portion 13 is biased to the left by the biasing force of the first spring 14. As the first spring 14 biases the pressing portion 13 to the left, the latch bolt 10 becomes movable to the left.

[0016] The latch hub 20 rotates around a central axis J extending in the thickness direction. The latch hub 20 has a first arm portion 21, a second arm portion 22, and a shaft fitting portion 23. The shaft fitting portion 23 is cylindrical and extends in the direction of the central axis J, opening to the interior of the vehicle. The shaft 2a of the handle lever 2 shown in FIG. 1 fits into the shaft fitting portion 23. By operating the handle lever 2 with the shaft 2a fitted in the shaft fitting portion 23, the latch hub 20 can rotate around the central axis J.

[0017] The first arm portion 21 extends upward from the shaft fitting portion 23. The first arm portion 21 has a gap at a position where it overlaps with the latch bolt 10 in the thickness direction. The latch bolt 10 is inserted into the gap in the first arm portion 21. The latch bolt 10 inserted into the gap in the first arm portion 21 can move in the left-right direction without interfering with the first arm portion 21.

[0018] When the latch hub 20 is rotated clockwise in FIG. 2, the first arm portion 21 comes into contact with the pressing portion 13 located on one side in the circumferential direction about the central axis J. The pressing portion 13 is pressed by the first arm portion 21 from the left side, and moves to the right against the biasing force of the first spring 14. As the pressing portion 13 moves to the right, the latch 11 moves to the right and is retracted into the casing 30. When the latch 11 is retracted into the casing 30, the door 1 can be opened.

[0019] The second arm portion 22 extends downward from the shaft fitting portion 23. The left side of the second arm portion 22 contacts the end face of the slider 34. The slider 34 is provided within the casing 30 so as to be movable left and right. The left side of the slider 34 contacts the second spring 24. The second spring 24 is a compressed coil spring. The right side of the second spring 24 contacts the slider 34 and the left side contacts the side wall 33 of the casing 30. The slider 34 is biased to the right by the biasing force of the second spring 24. As the second spring 24 biases the slider 34 to the right, the second arm portion 22 is movable in the counterclockwise direction. When the second arm portion 22 moves in the counterclockwise direction, the latch hub 20 rotates in the counterclockwise direction.

[0020] When the handle lever 2, with the shaft 2a fitted in the shaft fitting portion 23, is operated, the latch hub 20 rotates clockwise against the biasing force of the second spring 24. When the latch hub 20 rotates clockwise, the first arm portion 21 presses the pressing portion 13, moving it to the right. When the pressing portion 13 moves to the right against the biasing force of the first spring 14, the latch 11 is pulled into the casing 30, allowing the door 1 to open. When the operation of the handle lever 2 is released by releasing the hand, the latch hub 20 rotates counterclockwise due to the biasing force of the second spring 24 and comes into contact with the side wall 35 of the casing 30. When the latch hub 20 comes into contact with the side wall 35 of the casing 30, its counterclockwise rotational movement is restricted.

[0021] When the latch hub 20 rotates counterclockwise, the first arm portion 21 is released from pressing the pressing portion 13. The pressing portion 13, which has been released from pressing the first arm portion 21, moves to the left due to the biasing force of the first spring 14. When the pressing portion 13 moves to the left, the latch 11 returns to a state in which it protrudes from the front plate 31. The position of the latch hub 20 when the latch hub 20 comes into contact with the side wall 35, restricting rotational movement in the counterclockwise direction, and the latch 11 returns to a state in which it protrudes from the front plate 31 is called the return position.

[0022] The locking portion 40 is rotatable about an axis J2 parallel to the central axis J. The locking portion 40 has a third arm portion 41, a fourth arm portion 42, and a shaft fitting portion 43. The shaft fitting portion 43 is cylindrical and extends in the direction of the axis J2 parallel to the central axis J, and has a recess 43a that opens to the interior of the vehicle.

[0023] The locking portion 40 is rotatable between a first position P1 shown in FIG. 3 and a second position P2 shown in FIG. 2. In the first position P1, the third arm portion 41 extends downward from the shaft fitting portion 43 toward the first arm portion 21. In the first position P1, the tip of the third arm portion 41 is located in the rotation path of the first arm portion 21. In the first position P1, the tip of the third arm portion 41 is on the clockwise side of the first arm portion 21, which is in the return position. The position of the third arm portion 41 in the thickness direction is the same as the position of the first arm portion 21 in the thickness direction. The position of the third arm portion 41 in the thickness direction is a position where it does not interfere with the pressing portion 13. The third arm portion 41 is rotatable between the first position P1 and the second position P2 without interfering with the pressing portion 13.

[0024] When the locking portion 40 is in the first position P1 and the tip of the third arm portion 41 is located in the rotation path on the clockwise side of the first arm portion 21 which is in the return position, the clockwise rotational movement of the first arm portion 21 is restricted. When the clockwise rotational movement of the first arm portion 21 is restricted, the latch 11 is maintained in a state where it protrudes from the front panel 31.

[0025] At the second position P2, the third arm portion 41 contacts the side wall 36 of the casing 30. When the third arm portion 41 contacts the side wall 36, the counterclockwise rotational movement of the lock portion 40 is restricted. When the third arm portion 41 contacts the side wall 36, it moves away from the rotation path of the first arm portion 21. The second position P2 is a position where the lock portion 40 is away from the rotation path of the first arm portion 21.

[0026] The fourth arm portion 42 is disposed on the counterclockwise side of the third arm portion 41. At the first position P1, the fourth arm portion 42 extends downward from the shaft fitting portion 43. At the first position P1, the fourth arm portion 42 is located to the right of the pressing portion 13. At the second position P2, the fourth arm portion 42 extends to the right from the shaft fitting portion 43. At the second position P2, the fourth arm portion 42 contacts the side wall 37 of the casing 30. When the fourth arm portion 42 contacts the side wall 37, the counterclockwise rotational movement of the locking portion 40 is restricted. At the second position P2, the third arm portion 41 contacts the side wall 36, and the fourth arm portion 42 contacts the side wall 37, thereby restricting the counterclockwise rotational movement of the locking portion 40.

[0027] One end of the torsion coil spring 38 is connected to the outer peripheral surface of the shaft fitting portion 43. At the second position P2, the torsion coil spring 38 biases the shaft fitting portion 43 in the counterclockwise direction at a position below the axis J2, so that the locking portion 40 is maintained in the second position P2. At the first position P1, the torsion coil spring 38 biases the shaft fitting portion 43 in the radial direction toward the axis J2 at a position above the axis J2, so that the locking portion 40 does not rotate counterclockwise and is maintained in the first position P1.

[0028] The drive unit 50 moves the lock unit 40 between the first position P1 and the second position P2. The drive unit 50 is a motor that rotates the lock unit 40 about the axis J2 between the first position P1 and the second position P2. The drive unit 50 has a link mechanism 51 that converts the rotational drive of the motor into rotational movement about the axis J2. The link mechanism 51 is fixed to the outer peripheral surface of the shaft fitting portion 43.

[0029] The receiving unit 60 can receive locking and unlocking signals via wireless communication. The receiving unit 60 can receive locking and unlocking signals according to the position of the latch 11 via wireless communication. The locking signal is a signal that prevents operation of the handle lever 2 and keeps the latch 11 protruding from the front panel 31, thereby locking the door 1. The unlocking signal is a signal that allows operation of the handle lever 2 to retract the latch 11 into the casing 30, thereby making it possible to unlock the door 1 that has been locked using the latch 11.

[0030] The wireless communication standard used by the receiver 60 can be selected from at least one of Bluetooth (registered trademark), Wi-Fi, EnOcean, and optical communication such as infrared. The receiver 60 outputs the received lock signal and unlock signal to the controller 70.

[0031] The control unit 70 drives the drive unit 50 in response to either the lock signal or the unlock signal received and input by the receiving unit 60. When a lock signal is input, the control unit 70 controls the drive unit 50 to position the lock unit 40 at the first position P1. When an unlock signal is input, the control unit 70 controls the drive unit 50 to position the lock unit 40 at the second position P2.

[0032] The power supply unit 80 supplies power to the drive unit 50, the receiving unit 60, and the control unit 70. The power supply unit 80 is, for example, a battery. The power supply unit 80 is replaceable with respect to the casing 30.

[0033] The existing box lock is replaced with the box lock 100 and attached to the door 1. When a locking signal is sent via wireless communication to the door 1 to which the box lock 100 is attached, the locking portion 40 is positioned at the first position P1. When the locking portion 40 is positioned at the first position P1, the clockwise rotation of the latch hub 20 is prevented. When the clockwise rotation of the latch hub 20 is prevented, the handle lever 2 cannot be operated. When the clockwise rotation of the latch hub 20 is prevented and the handle lever 2 cannot be operated, the pressing portion 13 cannot move to the right, so the latch 11 is kept protruding from the front panel 31 and the door 1 is locked.

[0034] When an unlock signal is sent via wireless communication, the lock portion 40 is located at the second position P2. When the lock portion 40 is located at the second position P2, the latch hub 20 is allowed to rotate clockwise. When the latch hub 20 is allowed to rotate clockwise, the latch hub 20 rotates clockwise and moves the pressing portion 13 to the right when the handle lever 2 is operated. When the pressing portion 13 moves to the right, the latch 11 is retracted into the casing 30, the door 1 is unlocked, and the door 1 can be opened.

[0035] According to the locking box 100 and door 1 of this embodiment, even if the existing door 1 has an existing locking box attached and does not have a locking function, such as an indoor door, by replacing the existing locking box with the new locking box 100, the door 1 can be locked and unlocked contactlessly when a locking signal and an unlocking signal are transmitted via wireless communication. In this way, since the locking box 100 replaces the existing locking box, it can be easily installed without any complicated work. Since the locking box 100 is inserted into a recess in the existing door 1, there is no need to retrofit a locking unit or the like on the exterior of the door 1, and the appearance can be improved without increasing the size.

[0036] A second embodiment of the locking box 100 will now be described. In Figures 4 and 5, the same elements as those in the first embodiment shown in Figures 1 to 3 are designated by the same reference numerals, and their description will be omitted. The locking box 100 of the second embodiment differs from the first embodiment in the configuration of the drive unit.

[0037] As shown in FIG. 4, the locking box 100 of the second embodiment has a drive unit 52. The drive unit 52 is a linear actuator. The drive unit 52 has a solenoid unit 52A and a plunger 52B. The solenoid unit 52A linearly moves the plunger 52B depending on whether or not electricity is applied. The plunger 52B extends in the left-right direction perpendicular to the central axis J. The plunger 52B can linearly move in the left-right direction. The drive unit 52 has a link mechanism unit 53. The tip of the plunger 52B is connected to the outer peripheral surface of the shaft fitting portion 43. The link mechanism unit 53 converts the linear movement of the plunger 52B into rotational movement of the shaft fitting portion 43 about the axis J2.

[0038] When the solenoid portion 52A is not energized, the plunger 52B is extended to the right. When the plunger 52B is extended to the right, the lock portion 40 is located at the second position P2. The third arm portion 41 is separated from the rotation path of the first arm portion 21 of the latch hub 20.

[0039] 5, when the solenoid portion 52A is energized, the plunger 52B is retracted to the left from the position where it is extended to the right. When the plunger 52B is retracted to the left from the position where it is extended to the right, the lock portion 40 is located at the first position P1. The tip of the third arm portion 41 is located in the rotation path of the first arm portion 21 of the latch hub 20.

[0040] When a locking signal is transmitted via wireless communication, the control unit 70 energizes the solenoid unit 52A based on the locking signal input via the receiving unit 60. When the solenoid unit 52A is energized, the plunger 52B is pulled to the left, and the lock unit 40 is located at the first position P1. When the lock unit 40 is located at the first position P1, the handle lever 2 cannot be operated, the latch 11 is maintained in a state where it protrudes from the front panel 31, and the door 1 is locked.

[0041] When an unlock signal is transmitted via wireless communication, the control unit 70 stops the supply of electricity to the solenoid unit 52A based on the unlock signal input via the receiving unit 60. When the supply of electricity to the solenoid unit 52A is stopped, the plunger 52B is extended to the right, and the lock unit 40 is located in the second position P2. When the lock unit 40 is located in the second position P2, operation of the handle lever 2 is permitted. By operating the handle lever 2, the latch 11 is retracted into the casing 30, the door 1 is unlocked, and the door 1 can be opened.

[0042] According to the box lock 100 and door 1 of this embodiment, in addition to obtaining the same functions and effects as the box lock 100 of the first embodiment, a linear actuator that moves the plunger 52B linearly in the left-right direction is provided as the drive unit 52, thereby making it possible to make the door thinner.

[0043] The locking system SYS will now be described. As shown in Fig. 6, the locking system SYS includes a locking box 100, a transmitter 111, an infrared sensor 120, an electronic badge 130, and a display 140. The locking box 100 includes a radio wave transmitter 90.

[0044] Transmitting unit 111 selectively transmits a locking signal or an unlocking signal via wireless communication. Transmitting unit 111 is a program included in portable information communication terminal 110. Transmitting unit 111 is stored in the storage of portable information communication terminal 110. When the user performs an operation on portable information communication terminal 110 to select either the locking signal or the unlocking signal, terminal control unit 112 issues an instruction to transmitting unit 113 based on the transmission instruction set in transmitting unit 111, and causes either the locking signal or the unlocking signal to be transmitted in accordance with a predefined wireless communication standard.

[0045] The control unit 70 of the locking box 100 drives the drive units 50, 52 in response to a signal transmitted from the mobile information communication terminal 110 and received by the receiving unit 60, thereby setting the door 1 in either a state in which the door remains locked with the latch 11 protruding, or a state in which the latch 11 is retracted into the casing 30 by operating the handle lever 2, making it possible to unlock the door 1.

[0046] The infrared sensor 120 has a detection unit 121, a transmission unit 122, a terminal control unit 123, and a transmission unit 124. The transmission unit 122 is a program included in the infrared sensor 120. The detection unit 121 senses ambient heat when it emits infrared light as detection light. The detection unit 121 detects the approach of a user from a change in ambient temperature based on the sensed heat, and outputs the detection result to the terminal control unit 123. The terminal control unit 123 issues an instruction to the transmission unit 124 based on a transmission instruction set in the transmission unit 122, causing the transmission unit 124 to transmit either a lock signal or an unlock signal in accordance with a predefined wireless communication standard. The infrared sensor 120 is disposed, for example, on one side of the door 1. The infrared sensor 120 is a human presence sensor or the like.

[0047] The control unit 70 of the locking box 100 drives the drive units 50, 52 in response to a signal transmitted from the infrared sensor 120 and received by the receiving unit 60, thereby setting the door 1 in either a state in which the latch 11 is extended and the door 1 remains locked, or a state in which the latch 11 is retracted into the casing 30 by operating the handle lever 2, enabling the door 1 to be unlocked.

[0048] The electronic badge 130 has an identification information storage unit 131, a transmission unit 132, a terminal control unit 133, and a transmission unit 134. The transmission unit 132 is a program contained in the electronic badge 130. The identification information storage unit 131 stores identification information related to the owner of the electronic badge 130. When the electronic badge 130 approaches the radio wave transmission unit 90 contained in the lock box 100, it receives radio waves transmitted from the radio wave transmission unit 90. The terminal control unit 133 uses the received radio waves as power and issues instructions to the transmission unit 134 based on the transmission instructions set in the transmission unit 132, causing the transmission unit 134 to transmit the identification information of the electronic badge 130 in accordance with a predefined wireless communication standard.

[0049] When the identification information transmitted from the electronic badge 130 and received by the receiver 60 matches the pre-registered identification information, the control unit 70 of the lock box 100 drives the drive units 50, 52 to reverse one of the states in which the door 1 is kept locked with the latch 11 protruding, and the latch 11 is retracted into the casing 30 by operating the handle lever 2, making it possible to unlock the door 1, to the other.

[0050] The display unit 140 displays either locking information or unlocking information when it receives either a locking signal or an unlocking signal. The display unit 140 can display either locking information or unlocking information by, for example, at least one of text notation and color display. When the display unit 140 displays either locking information or unlocking information, the user can easily understand the locking status of the box lock 100 and the door 1. The display unit may be displayed on a mobile information communication terminal or attached to the door.

[0051] A modified example of the door will now be described. As shown in FIG. 7, the door 1A has a thumb turn 7 above the handle lever 2. The thumb turn 7 is arranged on one side of the door 1. The thumb turn 7 has a shaft 7a. The shaft 7a passes through the wall surface on one side of the door 1. The tip of the shaft 7a fits into a recess 43a of a shaft fitting portion 43 of the locking portion 40. When the thumb turn 7 is rotated, the locking portion 40 rotates between a first position P1 and a second position P2. When the thumb turn 7 is rotated, the door 1 switches between a locked state and an unlocked state. The door 1A has a locking function.

[0052] When a locking signal is sent to door 1A, which has a locking function, using wireless communication, door 1A is locked without operating thumb turn 7. When an unlocking signal is sent to door 1A, using wireless communication, door 1A is unlocked without operating thumb turn 7. Door 1A, which has a locking function, can be selectively locked and unlocked without contact using wireless communication.

[0053] While preferred embodiments of the present disclosure have been described above with reference to the accompanying drawings, it goes without saying that the present disclosure is not limited to these examples. The shapes and combinations of the components shown in the above examples are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present disclosure.

[0054] For example, in the embodiment, the door is a hinged door, but the present invention is not limited to this configuration and may be applied to a sliding door.

[0055] In the embodiment, a configuration has been described in which the display unit 140 displays either lock information or unlock information when it receives either a lock signal or an unlock signal, but this configuration is not limiting. For example, a configuration may be adopted in which the radio wave transmitter 90 transmits a display instruction signal when the control unit 70 controls the drive units 50, 52 to move the lock unit 40 between the first position P1 and the second position P2. The display unit 140 may receive the display instruction signal transmitted from the radio wave transmitter 90 and display either lock information or unlock information in accordance with the instruction contained in the received display instruction signal. [Explanation of symbols]

[0056] 1, 1A...door, 7...thumb turn, 10...latch bolt, 11...latch, 20...latch hub, 30...casing, 40...lock section, 43a...recess, 50, 52...drive section, 60...receiving section, 70...control section, 80...power supply section, 90...radio wave transmitting section, 100...box lock, 111, 122, 132...transmitting section, 120...infrared sensor, 130...electronic badge, 140...display section, J...center axis, J2...axis line, P1...first position, P2...second position, SYS...box lock system

Claims

1. a latch bolt having a latch; a latch hub that retracts the latch into the casing; a locking portion that restricts movement of the latch hub; a drive unit that electrically drives the lock unit; a receiving unit capable of receiving a locking signal and an unlocking signal corresponding to the position of the latch via wireless communication; a control unit that drives the drive unit in response to either the lock signal or the unlock signal received by the receiving unit; A power supply unit; in the casing, This box lock can be installed as a new replacement for an existing box lock attached to a door that does not have a thumb turn.

2. the power supply unit is a battery, The battery is inserted into the casing from the side of the door so that the longitudinal direction of the battery is aligned with the direction of advancement and retreat of the latch bolt. The box lock according to claim 1.

3. The box lock according to claim 1 or 2, A locking system comprising a transmitting unit that selectively transmits the locking signal and the unlocking signal by wireless communication.

4. The transmission unit is a program included in the mobile information communication terminal. The lock system according to claim 3.

5. The transmitter is provided in an infrared sensor that emits infrared light, senses heat, and selectively transmits the lock signal and the unlock signal by wireless communication. The lock system according to claim 3.

6. The locking box has a radio wave transmitting unit, the transmitter is provided in an electronic badge that selectively transmits the lock signal and the unlock signal by wireless communication when receiving the radio wave transmitted by the radio wave transmitter; The lock system according to claim 3.

7. a display unit that displays either lock information or unlock information when receiving either the lock signal or the unlock signal; A locking system according to any one of claims 3 to 6.

8. A door to which the box lock according to claim 1 or 2 is removably attached.

9. 9. The door of claim 8, comprising a hinged door.

10. A step of removing an existing box lock attached to an existing door that does not have a thumb turn; and a process of replacing the existing box lock with a new box lock attached to the existing door, the new box lock including in the casing a latch bolt having a latch, a latch hub that pulls the latch into a casing, a locking unit that restricts movement of the latch hub, a driving unit that electrically drives the locking unit, a receiving unit that can receive a locking signal and an unlocking signal according to the position of the latch by wireless communication, and a control unit that drives the driving unit according to either the locking signal or the unlocking signal received by the receiving unit. How to install a lock.

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