Lock system for movable component for bed

Abstract

To provide a lock system for a movable component for a bed capable of preventing the movable component for a bed from being unintentionally detached from a bed frame.SOLUTION: A lock system includes: a lock device which has a lock component that is movable between a lock position for locking a movable component to a bed frame and an unlock position for releasing the lock, and an actuator that moves or enables movement of the lock component from the lock position to the unlock position; a control device that controls operation of the actuator; and a portable terminal wirelessly connected to the control device. When the portable terminal is located outside a predetermined range from the bed, movement of the lock component from the lock position to the unlock position is restricted. When the portable terminal is located within the predetermined range from the bed, the control device controls operation of the actuator so as to move or enable movement of the lock component from the lock position to the unlock position.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a locking system for movable parts for a bed. [Background technology]

[0002] Patent Document 1 discloses an electric bed device that includes a bed frame and side rails arranged on both sides of the bed frame in the width direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-27735 Summary of the Invention [Problem to be solved by the invention]

[0004] In the electric bed device described in Patent Document 1, if the side rails are made detachable from the bed frame, the side rails may be unintentionally detached from the bed frame.

[0005] The present disclosure aims to provide a locking system for a movable part for a bed that can prevent the movable part for a bed from being unintentionally removed from the bed frame or the movable part for a bed from being unintentionally moved relative to the bed frame. [Means for solving the problem]

[0006] One aspect of the present disclosure provides a locking system for movable parts for a bed, which is arranged on a bed having a bed frame and movable parts removably or movably attached to the bed frame, and which fixes the movable parts to the bed frame. The locking system includes a locking device having a locking part that is movable between a locked position for locking the movable part to the bed frame and an unlocked position for unlocking the movable part, and an actuator for moving or enabling the locking part to move from the locked position to the unlocked position; a control device that controls the operation of the actuator; and a mobile terminal that is wirelessly connected to the control device. When the mobile terminal is outside a predetermined range from the bed, the movement of the locking part from the locked position to the unlocked position is restricted, while when the mobile terminal is within the predetermined range from the bed, the control device controls the operation of the actuator so that the locking part is moved or enabled to move from the locked position to the unlocked position.

[0007] According to this configuration, when a mobile terminal carried by an administrator authorized to unlock the movable parts is outside a predetermined range from the bed, the movement of the locking parts from the locked position to the unlocked position is restricted. On the other hand, when the mobile terminal is within the predetermined range from the bed, the control device controls the operation of the actuator to move or enable the locking parts to move from the locked position to the unlocked position. As a result, the locking parts are moved or enabled to move from the locked position to the unlocked position only when the administrator is within the predetermined range from the bed, allowing the movable parts to be removed from or moved relative to the bed frame. In other words, when the administrator is outside the predetermined range from the bed, the movable parts are prevented from being removed from or moved relative to the bed frame. This makes it possible to prevent the bed movable parts from being unintentionally removed from or moved relative to the bed frame. [Effects of the Invention]

[0008] According to the present disclosure, a locking system for a movable part for a bed can be provided that can prevent the movable part for a bed from being unintentionally removed from the bed frame or the movable part for a bed from being unintentionally moved relative to the bed frame. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a bed to which a lock system according to an embodiment of the present disclosure is applied. [Figure 2] FIG. 2 is an enlarged view of area A in FIG. [Figure 3] FIG. 3 is a diagram for explaining the configuration of the locking device according to the embodiment. [Figure 4] FIG. 4 is a block diagram for explaining the configuration of the lock system according to the embodiment. [Figure 5] FIG. 5 is a diagram for explaining the operation of the lock system shown in FIG. [Figure 6] FIG. 6 is a diagram for explaining the operation of the lock system shown in FIG. [Figure 7] FIG. 7 is a diagram for explaining the operation of the lock system shown in FIG. [Figure 8] FIG. 8 is a diagram for explaining the configuration of a locking device according to a modification of the embodiment. [Figure 9] FIG. 9 is a diagram illustrating the configuration of a locking device according to another modified example of the embodiment. [Figure 10] FIG. 9 is a diagram illustrating the configuration of a locking device according to another modified example of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0011] FIG. 1 is a perspective view of a bed 100 to which a lock system 1 (shown in FIG. 4) according to this embodiment is applied. The bed 100 is, for example, an electric bed installed in a hospital or a nursing facility. The "manager" according to the present disclosure refers to a doctor, nurse, or caregiver who manages the bed 100 in medical care, nursing, or caregiving, or a staff member working at the hospital or nursing facility. The "manager" according to the present disclosure may also be a person who installs or inspects the bed 100.

[0012] 1, the bed 100 has a rectangular shape in a plan view. In the following description, the longitudinal direction of the bed 100 may be simply referred to as the longitudinal direction, and the lateral direction of the bed 100 may be simply referred to as the lateral direction.

[0013] The bed 100 includes a bed frame 110, a headboard 120, a footboard 130, and a pair of side rails 140. The number of side rails 140 is not limited to two.

[0014] The bed frame 110 has a rectangular frame shape in a plan view. The bed frame 110 includes a pair of longitudinal frames 111 (only one of which is shown) extending in the longitudinal direction, and a pair of short frames (not shown) connecting the longitudinal ends of the pair of longitudinal frames 111. A base portion 112 to which a side rail 140 is removably fixed is fixed to each longitudinal frame 111.

[0015] The headboard 120 is fixed to one end of the bed frame 110 in the longitudinal direction. The footboard 130 is fixed to the other end of the bed frame 110 in the longitudinal direction. The headboard 120 and the footboard 130 extend in the short-side direction and in the up-down direction. The headboard 120 and the footboard 130 may be removably fixed to the bed frame 110.

[0016] The side rails 140 are removably fixed to the base 112. The pair of side rails 140 are arranged on both sides of the bed frame 110 in the short direction. The side rails 140 extend in the longitudinal direction and the up-down direction as a whole. The side rails 140 of this embodiment are an example of a movable part according to the present disclosure.

[0017] Figure 2 is an enlarged view of area A in Figure 1. Referring to Figure 2, side rail 140 has a fixed shaft 141 that is inserted into mounting hole 112a (shown in Figure 3) of base portion 112. Fixed shaft 141 extends in the vertical direction. Locking device 10 is disposed on base portion 112 to removably fix side rail 140 to bed frame 110 (shown in Figure 1).

[0018] 3 is a diagram illustrating the configuration of the locking device 10 of this embodiment. The locking device 10 of this embodiment has a latch mechanism that holds a striker 142 attached to a fixed shaft 141 of a side rail 140. The locking device 10 includes a housing 11, a fork 12, an electric motor 13, and a spring 14.

[0019] The housing 11 accommodates at least the fork 12 and the spring 14. The housing 11 is cylindrical and has an open top and a closed bottom. The housing 11 is disposed within the base 112 so that the opening at the top is exposed to the outside of the base 112 through an opening (not shown) formed in the upper surface of the base 112. The housing 11 is provided with a guide groove 11a that guides the striker 142. The guide groove 11a is formed by cutting downward from the upper end of a side wall that extends in the longitudinal direction and the up-down direction of the housing 11. That is, the upper end of the guide groove 11a is open, and the lower end of the guide groove 11a terminates within the side wall in which the guide groove 11a is formed.

[0020] The fork 12 is movable between a locked position (shown in FIG. 6) for locking the side rail 140 to the bed frame 110 and an unlocked position (shown in FIG. 7) for unlocking the side rail 140. The fork 12 has a cylindrical shaft 12a that is rotatably supported by the housing 11. In this embodiment, the fork 12 rotates about a rotation axis R to move between the locked position and the unlocked position. In this embodiment, the fork 12 moves from the locked position to the unlocked position by rotating clockwise about the rotation axis R.

[0021] When the fork 12 is in the locked position, the fork 12 has an engagement claw 12b that protrudes into the guide groove 11a and restricts movement of the striker 142 so that the striker 142 cannot be disengaged from the guide groove 11a. In other words, when the fork 12 is in the locked position, the fork 12 has an engagement claw 12b that protrudes into the guide groove 11a and prohibits movement of the striker 142 so that the striker 142 cannot be disengaged from the guide groove 11a. When the fork 12 is in the unlocked position, the engagement claw 12b retracts from the guide groove 11a, thereby allowing the striker 142 to be disengaged from the guide groove 11a.

[0022] When the fork 12 is in the locked position, the upper surface 12c of the engagement claw 12b is inclined downward toward one side in the longitudinal direction (the left side in FIG. 3 ). When the striker 142 is inserted into the guide groove 11a and is in contact with the upper surface 12c, if the striker 142 is further pushed down, the force applied to the upper surface 12c by the striker 142 causes the fork 12 to rotate from the locked position to the unlocked position around the rotation axis R. When the fork 12 is in the locked position, the lower surface 12d of the engagement claw 12b extends perpendicular to the extension direction of the guide groove 11a. In this embodiment, if an attempt is made to push the striker 142 up from a state in which the striker 142 is in contact with the lower surface 12d in the guide groove 11a, the lower surface 12d receives a generally upward force component from the striker 142. Therefore, the fork 12 does not rotate from the locked position to the unlocked position around the rotation axis R.

[0023] The electric motor 13 is mechanically connected to the fork 12. The electric motor 13 rotates the fork 12 about a rotation axis R, thereby moving the fork 12 from the locked position to the unlocked position. The electric motor 13 is electrically connected to a power source (not shown).

[0024] The spring 14 biases the fork 12 from the unlocked position toward the locked position. The spring 14 is disposed so as to surround the rotation axis R. One end of the spring 14 contacts a locking piece 11b provided on the housing 11. The other end of the spring 14 contacts a locking piece 12e provided on the fork 12.

[0025] 4 is a diagram illustrating the configuration of the lock system 1 of this embodiment. Referring to FIG. 4, the lock system 1 includes a lock device 10, a mobile terminal 20, an unlock switch 30, and a control device 40.

[0026] The portable terminal 20 of this embodiment is an electronic key carried by an administrator who has the authority to unlock the side rail 140. The portable terminal 20 includes a wireless communication unit 21 for wireless communication with the control device 40. The wireless communication unit 21 transmits signals in the UHF (Ultra High Frequency) band and receives signals in the LF (Low Frequency) band. The wireless communication unit 21 transmits a signal indicating a personal identification code to the control device 40.

[0027] The unlock switch 30 is an element used by the administrator to unlock the side rail 140. The unlock switch 30 of this embodiment is a button-type switch that is pushed by the administrator. The unlock switch 30 is electrically connected to the control device 40. When the unlock switch 30 is operated, specifically when the unlock switch 30 is pressed, the unlock switch 30 transmits an unlock signal to the control device 40 indicating that the unlocking of the side rail 140 is requested. Furthermore, as shown in FIG. 2 , the unlock switch 30 is attached to the base portion 112. The unlock switch 30 of this embodiment is an example of an operation portion according to the present disclosure.

[0028] The control device 40 includes, for example, a central processing unit (CPU) or a microprocessing unit (MPU) that cooperates with software or a program to realize predetermined functions. The control device may be configured with hardware such as a dedicated electronic circuit or a reconfigurable electronic circuit designed to realize the predetermined functions, or may be configured with various semiconductor integrated circuits. Examples of various semiconductor integrated circuits that may be used include a CPU, an MPU, a microcomputer, a digital signal processor (DSP), a field programmable gate array (FPGA), and an application specific integrated circuit (ASIC). The control device 40 may also include storage devices such as a random access memory (RAM) and a read only memory (ROM).

[0029] The control device 40 includes a wireless communication unit 41, a first determination unit 42, a second determination unit 43, and a motor control unit 44. Each of the wireless communication unit 41, the first determination unit 42, the second determination unit 43, and the motor control unit 44 is realized, for example, by the control device 40 executing a predetermined program.

[0030] The wireless communication unit 41 is configured to communicate wirelessly with the mobile terminal 20. The wireless communication unit 41 transmits signals in the LF band and receives signals in the UHF band. The wireless communication unit 41 wirelessly transmits a request signal requesting transmission of a personal identification code to the mobile terminal 20, and wirelessly receives a response signal indicating the personal identification code from the mobile terminal 20. The output of the request signal is set to reach only within a predetermined range (for example, 0 to 3 m) from the bed 100.

[0031] The first determination unit 42 determines whether the mobile terminal 20 is within a predetermined range from the bed 100 based on the signal from the mobile terminal 20. Specifically, the first determination unit 42 determines that the mobile terminal 20 is within a predetermined range from the bed 100 when the wireless communication unit 41 receives a response signal from the mobile terminal 20 and the personal identification code indicated by the response signal matches a predetermined code.

[0032] The second determination unit 43 is electrically connected to the unlock switch 30. The second determination unit 43 determines whether the unlock switch 30 has been operated based on a signal from the unlock switch 30. Specifically, when the second determination unit 43 receives an unlock signal from the unlock switch 30, it determines that the unlock switch 30 has been operated.

[0033] The motor control unit 44 determines whether a predetermined release condition is met and controls the operation of the electric motor 13 according to the determination result. Specifically, when the predetermined release condition is met, the motor control unit 44 turns on the power supply from a power source (not shown) to the electric motor 13, thereby driving the electric motor 13. This moves the fork 12 from the locked position to the unlocked position, and unlocks the side rail 140. The release condition in this embodiment is that the mobile terminal 20 is within a predetermined range from the bed 100 and the unlock switch 30 is operated.

[0034] After moving the fork 12 from the locked position to the unlocked position, the motor control unit 44 drives the electric motor 13 to maintain the fork 12 at the unlocked position against the biasing force of the spring 14 until a predetermined time (e.g., one minute) has elapsed. After moving the fork 12 from the locked position to the unlocked position, the motor control unit 44 stops driving the electric motor 13 after a predetermined time (e.g., one minute) has elapsed. As a result, the fork 12 moves from the unlocked position toward the locked position due to the biasing force of the spring 14.

[0035] The locking operation for locking the side rails 140 to the bed frame 110 will now be described with reference to FIGS.

[0036] First, in the state shown in Figure 3 where the side rails 140 are not attached to the bed frame 110, the fixed shaft 141 is inserted into the attachment hole 112a of the base part 112, and the striker 142 is inserted into the guide groove 11a. In the state shown in Figure 3, the fork 12 is maintained in the locked position by the biasing force of the spring 14.

[0037] Next, when the striker 142 is pressed further down while in contact with the upper surface 12c of the fork 12, as shown in Figure 5, the force that the upper surface 12c receives from the striker 142 causes the fork 12 to rotate around the rotation axis R against the biasing force of the spring 14 (see arrow B in the figure).

[0038] Thereafter, when the striker 142 is further pushed down from the state shown in Fig. 5, the fork 12 further rotates about the rotation axis R, and the striker 142 climbs over the fork 12 and reaches the lower end of the guide groove 11a as shown in Fig. 6. When the striker 142 climbs over the fork 12, the fork 12 no longer receives force from the striker 142, and the fork 12 returns to the locked position shown in Fig. 6 due to the biasing force of the spring 14.

[0039] 6, when the fork 12 is in the locked position, the engagement claw 12b, specifically the lower surface 12d of the engagement claw 12b, restricts the upward movement of the striker 142. This prevents the striker 142 from disengaging from the guide groove 11a, and the side rail 140 is locked to the bed frame 110.

[0040] 6 and 7, an unlocking operation for unlocking the side rails 140 from the bed frame 110 will be described. The unlocking operation is performed by the control device 40 controlling the operation of the motor 13.

[0041] When the fork 12 is in the locked position as shown in Fig. 6, the unlocking operation is executed when the mobile terminal 20 is within a predetermined range from the bed 100 and the unlock switch 30 is operated. Specifically, the control device 40 determines whether the mobile terminal 20 is within the predetermined range from the bed 100 and whether the unlock switch 30 has been operated. As a result, if it is determined that the mobile terminal 20 is within the predetermined range from the bed 100 and that the unlock switch 30 has been operated, the control device 40 drives the electric motor 13 to move the fork 12 from the locked position shown in Fig. 6 to the unlocked position shown in Fig. 7.

[0042] To determine whether the mobile terminal 20 is within a predetermined range from the bed 100, first, a request signal requesting transmission of a personal identification code is output from the wireless communication unit 41 of the control device 40 at predetermined time intervals. If the mobile terminal 20 is within the predetermined range from the bed 100, a response signal is transmitted from the mobile terminal 20 to the control device 40 in response to the request signal. When the control device 40 receives the response signal from the mobile terminal 20, the control device 40 determines whether the personal identification code in the response signal matches a predetermined authentication code. If the personal identification code in the response signal matches the predetermined authentication code, the control device 40 determines that the mobile terminal 20 is within the predetermined range from the bed 100.

[0043] The determination as to whether the unlock switch has been operated is made based on a signal from the unlock switch 30. Specifically, when the control device 40 receives an unlock signal from the unlock switch 30, it determines that the unlock switch 30 has been operated.

[0044] The determination of whether the mobile terminal 20 is within a predetermined range from the bed 100 and the determination of whether the unlock switch 30 has been operated may be performed in parallel, or one of them may be performed before the other.

[0045] 7, when the fork 12 is in the unlocked position, the engaging claws 12b of the fork 12 are retracted from the guide groove 11a, allowing the striker 142 to disengage from the guide groove 11a. In other words, when the fork 12 is in the unlocked position, the side rail 140 is unlocked. This allows the side rail 140 to be removed from the bed frame 110 by pulling the striker 142 out of the guide groove 11a and pulling the fixed shaft 141 out of the mounting hole 112a of the base portion 112.

[0046] Thereafter, the control device 40 drives the electric motor 13 so that the fork 12 is maintained in the unlocked position against the biasing force of the spring 14 until a predetermined time (e.g., one minute) has elapsed after moving the fork 12 from the locked position to the unlocked position. After the predetermined time (e.g., one minute) has elapsed after moving the fork 12 from the locked position to the unlocked position, the control device 40 stops driving the electric motor 13. As a result, the fork 12 moves from the unlocked position toward the locked position due to the biasing force of the spring 14.

[0047] The lock system 1 according to this embodiment is a bed-movable part lock system that is disposed in a bed 100 having a bed frame 110 and a movable part 140 that is removably attached to the bed frame 110, and that secures the movable part 140. The lock system 1 includes a lock device 10 having a lock part 12 that is movable between a locked position for locking the movable part 140 to the bed frame 110 and an unlocked position for unlocking the movable part 140, and an actuator 13 for moving the lock part 12 from the locked position to the unlocked position, a control device 40 that controls the operation of the actuator 13, and a mobile terminal 20 that is communicatively connected to the control device 40 and carried by an administrator authorized to unlock the movable part 140. When the mobile terminal 20 is outside a predetermined range from the bed 100, the movement of the locking component 12 from the locked position to the unlocked position is restricted, while when the mobile terminal 20 is within a predetermined range from the bed 100, the control device 40 controls the operation of the actuator 13 so as to move or enable the locking component 12 to move from the locked position to the unlocked position.

[0048] According to the lock system 1 of this embodiment, when the mobile terminal 20 carried by the administrator authorized to unlock the movable part 140 is outside a predetermined range from the bed 100, the movement of the lock part 12 from the locked position to the unlocked position is restricted. On the other hand, when the mobile terminal 20 is within the predetermined range from the bed 100, the control device 40 controls the operation of the actuator 13 to move the lock part 12 from the locked position to the unlocked position. As a result, the lock part 12 is moved from the locked position to the unlocked position only when the administrator is within the predetermined range from the bed 100, and the movable part 140 can be removed from the bed frame 110. In other words, when the administrator is outside the predetermined range from the bed 100, the movable part 140 is prevented from being removed from the bed frame 110. This prevents the bed movable part 140 from being unintentionally removed from the bed frame 110.

[0049] The lock system 1 of this embodiment includes an operation unit 30 operated by an administrator, and the control device 40 controls the operation of the actuator 13 to move the locking component 12 from the locked position to the unlocked position when the mobile terminal 20 is within a predetermined range from the bed 100 and the operation unit 30 is operated. As a result, only when both of the following two conditions are met: the administrator is within the predetermined range from the bed 100 and the operation unit 30 is operated by the administrator, the locking component 12 is moved from the locked position to the unlocked position, and the movable component 140 can be removed from the bed frame 110. As a result, it is possible to prevent the bed movable component 140 from being unintentionally removed from the bed frame 110.

[0050] The control device 40 of this embodiment controls the operation of the actuator 13 so that the locking component 12 moves from the unlocked position to the locked position after a predetermined time has elapsed since the locking component 12 moved to the unlocked position. This prevents the locking component 12 from remaining in the unlocked position after moving to the unlocked position. As a result, it is possible to prevent the movable bed component 140 from being unintentionally removed from the bed frame 110.

[0051] Locking device 10 includes spring 14 that biases locking component 12 from the unlocked position toward the locked position, and locking component 12 is moved from the locked position to the unlocked position and held in the locked position by being driven by actuator 13, while being moved from the unlocked position to the locked position by being biased by spring 14 and held in the locked position. As a result, actuator 13 only moves locking component 12 from the locked position to the unlocked position and holds it in the unlocked position, while spring 14 moves locking component 12 from the unlocked position to the locked position and holds it in the locked position. As a result, even if an attempt is made to forcibly remove movable component 140 locked by locking device 10, it is possible to suppress load on actuator 13.

[0052] (Variation) The locking system according to the present disclosure is not limited to the configuration of the above-described embodiment, and various modifications are possible.

[0053] In the above embodiment, the electric motor 13 is mechanically connected to the fork 12 and moves the fork 12 from the locked position to the unlocked position. However, this is not limiting. As in a modified example shown in FIG. 8 , the electric motor 13 does not necessarily have to directly move the fork 12. In the modified example shown in FIG. 8 , the locking device 10 has a pin 15 that straddles the housing 11 and the fork 12 when the fork 12 is in the locked position and prevents the fork 12 from moving from the locked position to the unlocked position. The electric motor 13 is mechanically connected to the pin 15 and moves the pin 15 to release the engagement between the pin 15 and the fork 12 (see arrow C in FIG. 8 ). In this modified example, the control device 40 controls the operation of the electric motor 13 when a predetermined release condition is met to release the engagement between the pin 15 and the fork 12, thereby enabling the fork 12 to move from the locked position to the unlocked position.

[0054] In the modification shown in Fig. 8, the lower surface 12d of the engagement claw 12b of the fork 12 is inclined upward toward one side in the longitudinal direction (the left side in Fig. 8) when the fork 12 is in the locked position. When the engagement between the pin 15 and the fork 12 is released and the striker 142 is pushed up from a state in which the striker 142 is in contact with the lower surface 12d within the guide groove 11a, the force acting on the lower surface 12d from the striker 142 causes the fork 12 to rotate from the locked position toward the unlocked position around the rotation axis R. This allows the striker 142 to be manually removed from the guide groove 11a.

[0055] As shown in another modification in FIGS. 9 and 10 , the lock system 1 may be configured to manually unlock the side rail 140 in an emergency when the lock system 1 is inoperable, such as when a power outage occurs, when the electric motor 13 or the control device 40 fails, or when the mobile terminal 20 is lost. FIGS. 9 and 10 are diagrams illustrating the configuration of a lock device 10 according to another modification. In the modification shown in FIGS. 9 and 10 , the lock device 10 further includes a key cylinder 16, a mechanical key 17 inserted into the key cylinder 16, and a lever 18 attached to the key cylinder 16. The lever 18 rotates integrally with the key cylinder 16 and moves between a position where the fork 12 is pressed into the locked position (shown in FIG. 9 ) and a position where the fork 12 is maintained in the unlocked position (shown in FIG. 10 ).

[0056] As shown in Figure 9, when the fork 12 is in the locked position, if the mechanical key 17 is inserted into the key groove 16a of the key cylinder 16 and rotated, the lever 18 formed integrally with the key cylinder 16 moves as the mechanical key 17 rotates (see arrow D in Figure 9). This movement of the lever 18 causes the fork 12 to receive force from the lever 18 and rotate from the locked position to the unlocked position against the biasing force of the spring 14, as shown in Figure 10. This allows the striker 142 to be manually removed from the guide groove 11a using the mechanical key 17 even in an emergency when the lock system 1 is not operational.

[0057] In the above embodiment, an electronic key was described as an example of a mobile terminal according to the present disclosure, but the mobile terminal according to the present disclosure is not limited to an electronic key and may be, for example, a smartphone, a tablet terminal, etc.

[0058] In the above embodiment, the side rail 140 was described as an example of a movable part according to the present disclosure, but the movable part according to the present disclosure is not limited to the side rail 140 and may be, for example, the headboard 120 or the footboard 130.

[0059] In the above embodiment, the side rail 140 that is removably attached to the bed frame 110 has been described as an example of a movable part according to the present disclosure, but the movable part according to the present disclosure is not limited to the side rail 140 that is removably attached to the bed frame 110. The movable part according to the present disclosure may also be a side rail, headboard, or footboard that is movably (for example, swivellably or foldably) attached to the bed frame.

[0060] In the above embodiment, an electric motor 13 was described as an example of an actuator according to the present disclosure, but the actuator according to the present disclosure is not limited to the electric motor 13 and may be, for example, another mechanism such as an air cylinder.

[0061] In the above embodiment, the unlock switch 30, which is a button-type switch, was described as an example of an operating unit according to the present disclosure, but the operating unit according to the present disclosure is not limited to the unlock switch 30 and may be of another type.

[0062] In the above embodiment, when it is determined that the mobile terminal 20 is within a predetermined range from the bed 100 and when it is determined that the unlock switch 30 has been operated, the control device 40 drives the electric motor 13 to move the fork 12 from the locked position to the unlocked position, but this is not limiting. When it is determined that the mobile terminal 20 is within a predetermined range from the bed 100, the control device 40 may drive the electric motor 13 to move the fork 12 from the locked position to the unlocked position.

[0063] In the above embodiment, the wireless communication unit 41 of the control device 40 continues to transmit a request signal requesting transmission of a PIN code intermittently at a predetermined time interval, but this is not limited to this and the signal may be transmitted when the unlock switch 30 is operated.

[0064] In the above embodiment, the output range (e.g., 0 to 3 m) of the request signal output from the wireless communication unit 41 of the control device 40 was described as an example of the predetermined range according to the present disclosure. However, the predetermined range according to the present disclosure is not limited to the output range of the request signal output from the wireless communication unit 41 of the control device 40. For example, a threshold value may be set for the reception strength of the response signal received by the wireless communication unit 41 of the control device 40 from the wireless communication unit 21 of the mobile terminal 20, and a range narrower than the output range of the request signal may be used as the predetermined range according to the present disclosure so that the siderail 140 is unlocked only when the wireless communication unit 41 receives a response signal whose strength exceeds the threshold. By setting the predetermined range according to the present disclosure narrower than the output range of the request signal, it is possible to prevent people other than the administrator from unlocking the siderail 140 when the administrator is located relatively far away (e.g., 2 to 3 m) within the output range of the request signal, i.e., far from the bed 100. [Explanation of symbols]

[0065] 1. Locking system 10 Locking device 11. Housing 11a Guide groove 11b Locking piece 12 Fork (locking parts) 12a Shaft 12b Engagement claw 12c top 12d bottom surface 12e Locking piece 13 Electric motor (actuator) 14 Spring 15-pin 16 Key cylinder 16a Keyway 17 Mechanical Key 18 Lever 20 Mobile devices 21 Radio Communication Department 30 Unlock switch (operation part) 40 Control device 41 Radio Communication Department 42 1st Judgment Section 43 Second Judgment Section 44 Motor control unit 100 beds 110 Bed Frame 111 Longitudinal Frame 112 Base 112a Mounting hole 120 Headboard 130 Footboard 140 Side rail (movable part) 141 Fixed axis 142 Striker

Claims

1. A bed movable part locking system for a bed, the bed having a bed frame and a movable part removably or movably attached to the bed frame, for fixing the movable part to the bed frame, comprising: a locking device including a locking element movable between a locked position for locking the movable element to the bed frame and an unlocked position for unlocking the movable element, and an actuator for moving or enabling the locking element to move from the locked position to the unlocked position; a control device for controlling the operation of the actuator; a mobile terminal that is wirelessly connected to the control device; Equipped with A locking system for movable parts for a bed, wherein when the mobile terminal is out of a predetermined range from the bed, movement of the locking part from the locked position to the unlocked position is restricted, while when the mobile terminal is within the predetermined range from the bed, the control device controls the operation of the actuator so that the locking part is moved or made movable from the locked position to the unlocked position.

2. An operation unit that is operated by a user is provided, 2. The locking system for movable parts for a bed according to claim 1, wherein the control device controls the operation of the actuator so as to move or make movable the locking part from the locked position to the unlocked position when the mobile terminal is within the predetermined range from the bed and the operating unit is operated.

3. 2. The locking system for a movable part of a bed according to claim 1, wherein the operation of the actuator is controlled so that the locking part moves from the unlocked position to the locked position after a predetermined time has elapsed since the locking part moved to the unlocked position.

4. the locking device includes a spring that biases the locking component from the unlocked position toward the locked position; 2. The locking system for a movable part for a bed according to claim 1, wherein the locking part is moved from the locked position to the unlocked position by being driven by the actuator and is held at the locked position, and is moved from the unlocked position to the locked position by being biased by the spring and is held at the locked position.

Images