Lock for sleeping berth

Abstract

The lock comprises a fixed seat connected with a vehicle body and an unlocking piece located in the sleeping berth bed, the fixed seat comprises a lock catch and a support, the lock catch and the support are rotationally connected, a first torsional spring is arranged between the lock catch and the support, the first torsional spring drives the lock catch to stretch out of the support, and a bottom supporting structure of the sleeping berth bed is formed; the unlocking piece comprises a rotating disc and connecting rods, the connecting rods are hinged to the left side and the right side of the rotating disc, and the rotating disc rotates to drive the connecting rods on the left side and the right side to stretch out simultaneously and push the lock catch to retract into the support. The springs sleeve the ends of the connecting rods, the springs push the connecting rods to retract into the sleeping berth bed, and the fixing mechanism is located at the bottom of the sleeping berth bed and does not occupy the usable area of the sleeping berth bed. The unlocking piece is located on the outer side of the sleeping berth bed and does not occupy the space of the inner side of the sleeping berth bed, and no gap exists between the sleeping berth bed and the wall.

Description

Technical Field

[0001] The invention relates to a lock, in particular to a lock for a berth bed. Background Art

[0002] In rail transit, berths are usually divided into layers to facilitate passengers to rest while increasing space utilization. In order to further improve space utilization, existing berths adopt a folding mode. For example, the utility model patent application with publication number CN220974166U discloses a foldable berth for rail vehicles. In order to ensure the stability of the bed in use, a connecting rod is provided inside the bed frame along the length direction, and a limit rod is installed at the end of the connecting rod. The limit rod is provided along the width direction of the bed frame, and a limit seat is provided on the wall inside the bed frame. When the bed is in use, the connecting rod is driven to insert the limit rod into the limit seat to ensure the stability of the bed. When the bed is folded, the limit rod retracts. In the current solution, the wrench that drives the connecting rod to rotate is located at both ends of the bed, and the limit seat is located on the inside of the bed, occupying the space at both ends and inside of the bed, reducing the available area of ​​the bed. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a lock for a berth bed to solve the technical problem of using a berth bed for surface connection.

[0004] Technical solution: The lock for a berth bed described in the present invention includes a fixed seat connected to the vehicle body and an unlocking piece located inside the berth bed, the fixed seat includes a lock buckle and a support, the lock buckle and the support are rotatably connected and are provided with a first torsion spring, the first torsion spring drives the lock buckle to extend out of the support to form a bottom support structure of the berth bed; the unlocking piece includes a rotating disk and a connecting rod, the connecting rod is hinged on the left and right sides of the rotating disk, and the rotating disk rotates to drive the connecting rods on the left and right sides to extend at the same time, pushing the lock buckle into the support; a spring is sleeved on the end of the connecting rod, and the spring pushes the connecting rod to retract into the berth bed.

[0005] Preferably, the unlocking member includes an unlocking handle, which is connected to a first rotating shaft, which passes through the outer side wall of the berth bed and is rotatably connected to the berth bed. One end of the first rotating shaft extending into the berth bed is connected to an unlocking disk, and a first short pin is provided on the unlocking disk; a second short pin is provided on the rotating disk, and the first short pin is in contact with the second short pin, and the handle pushes the rotating disk to rotate through the first short pin and the second short pin.

[0006] Preferably, the handle is installed through a mounting seat, the mounting seat is embedded in the outer side wall of the bunk bed, the first rotating shaft passes through the mounting seat, and a second torsion spring is provided between the handle and the mounting seat.

[0007] Preferably, a first notch is provided on the outer contour of the unlocking disk, and a safety shaft is rotatably connected to the mounting seat, the safety shaft passes through the mounting seat, and one end of the safety shaft protruding from the mounting seat is connected to a limit block, and a protrusion is provided on the outer contour of the limit block, which is inserted into the first notch to prevent the unlocking disk from rotating.

[0008] Preferably, a second notch is provided on the outer contour of the limit block, and a bumping ball is provided on the mounting seat at the top of the limit block, and the bumping ball is inserted into the second notch to prevent the limit block from rotating.

[0009] Preferably, a groove for driving the safety shaft to rotate is provided at one end of the safety shaft close to the handle.

[0010] Preferably, the mounting seat is provided with indicator positions, and the number of the indicator positions is consistent with the number of the second notches.

[0011] Preferably, the support is provided with a mounting groove for accommodating a lock, one end of the lock is sleeved with a pin, the pin is inserted into the support along the vertical direction of the mounting groove, a screw is provided on the support at the top of the pin, and the screw and the pin are abutted.

[0012] Preferably, the first short pin is parallel to the first rotating shaft, and the second short pin is parallel to the second rotating shaft of the rotating disk.

[0013] Preferably, the lock for the berth bed comprises a lock stopper which is a concave piece connected to both ends of the berth bed. Before the berth bed is fixed, the edge of the lock stopper pushes the lock buckle to retract into the support.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following advantages: 1. Guaranteeing the usable area of ​​the bed: the fixing mechanism is located at the bottom of the berth bed and does not occupy the usable area of ​​the berth bed; 2. The unlocking part is located outside the berth bed and does not occupy the space inside the berth bed, and there is no gap between the berth bed and the wall; 3. The structure is simple, easy to install, and has a small dead weight, which can reduce the weight of the berth bed; 4. It has a safety structure, double insurance, prevents misoperation, and has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an exploded view of the fixing seat structure of the present invention;

[0016] Figure 2 It is a front view of the lock of the present invention;

[0017] Figure 3 is a top view of the lock of the present invention;

[0018] Figure 4 An exploded view of the rotating disk structure of the present invention;

[0019] Figure 5 It is a schematic diagram of the connecting rod structure of the present invention;

[0020] Figure 6 An exploded view of the manual assembly structure of the present invention;

[0021] Figure 7 It is a schematic diagram of the matching structure of the manual component and the rotating disk of the present invention;

[0022] Figure 8 It is a schematic diagram of the external structure of the manual component of the present invention;

[0023] Fig. 9 It is a cross-sectional view of the locking structure of the present invention. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0025] The locks for sleeper beds can be mainly divided into three parts: the fixing parts, the unlocking parts and the safety mechanism. Figure 1 The berth bed fixing part is a fixing seat 4, which is installed on the wall inside the vehicle body or the cabin, and is located at both ends of the berth bed. The fixing seat 4 is mainly composed of a support 41 and a lock 42. The lock 42 is arranged in the horizontal direction, and the support 41 has a mounting groove. The lock 42 is located in the mounting groove 46. One end of the lock 42 is sleeved with a pin shaft 43, and is rotatably connected with the support 41 through the pin shaft 43. There is a torsion spring 44 between the lock 42 and the support 41. When the torsion spring 44 is in a relaxed state, the torsion spring 44 drives the lock 42 to extend out of the mounting groove to form a bracket supporting the berth bed. When the berth bed is folded, the berth bed passes through the fixing seats 4, and the bottoms of the two ends are placed on the fixing seats 4, so that the berth bed is supported. When the berth bed needs to be released, the lock 42 is pushed to rotate around the pin shaft 43, overcome the elastic force of the torsion spring 44 and sink into the mounting groove, so that the berth bed can be released and unfolded. The pin shaft 43 is arranged along the mounting groove 46 in the vertical direction, and a transverse screw 45 is provided on the support 41 at the top of the pin shaft to fix the pin shaft 43 and prevent the pin shaft 43 from axially moving.

[0026] The unlocking member 2 is installed inside the berth bed and arranged along the length direction of the berth bed to simultaneously drive the lock buckles 42 at both ends of the berth bed to retract. The unlocking member 2 includes a connecting rod 21 and a rotating disk 22. The connecting rod 21 is located on the left and right sides of the rotating disk 22 and is hinged to the rotating disk 22. The connecting rods 21 on the left and right sides are driven by the rotating disk 22 in the middle position, so as to extend or retract at the same time. The rotating disk 22 can also be a rod-shaped structure. The center of the rotating disk 22 is installed through a rotating shaft 221, and the rotating shaft 221 is arranged along the thickness (height) direction of the berth bed. A spring 23 is sleeved on the end of the connecting rod 21, and a washer 24 is provided. When the spring 23 is in a relaxed state, the spring 23 pushes the connecting rod 21 to retract into the berth bed through the washer 24.

[0027] A short pin 222 is disposed at one end of the rotating disk 22 , and the short pin 222 is parallel to the rotating shaft 221 . The unlocking member 2 also includes a handle 11, which is installed through a mounting seat 12. When in use, the mounting seat 12 passes through the outer facade of the berth bed; the handle 11 has a rotating shaft 111, and the handle 11 is fixedly connected to one end of the rotating shaft 111 and rotates synchronously. The rotating shaft 111 passes through the mounting seat 12, and the rotating shaft 111 is rotatably connected to the mounting seat 12. The other end of the rotating shaft 111 passing through the mounting seat 12 is a polygonal shaft, which is connected to an unlocking disk 13. A short pin 131 is arranged on the unlocking disk 13, and the short pin 131 is parallel to the rotating shaft 111. After assembly, the short pin 131 contacts the short pin 222. Before the berth bed is unfolded, the handle 11 is rotated, and the unlocking disk 13 rotates synchronously with the handle 11. The short pin 131 pushes the rotating disk 22 to rotate through the short pin 222, driving the connecting rod 21 to extend, pushing the lock buckle 42 to retract and sink into the mounting groove 46, and the berth bed can pass through the middle of the left and right fixed seats 4 to perform the unfolding action. A torsion spring 14 is provided between the rotating shaft 111 and the mounting seat 12 to enable the handle 11 to be reset.

[0028] The outer contour of the unlocking disk 13 is provided with two notches 132. The unlocking member 2 is provided with a safety assembly 3, which is mounted on the mounting seat 12. The safety assembly 3 includes a safety shaft 31, which passes through the mounting seat 12 and extends into the berth bed. One end of the safety shaft 31 passing through the mounting seat 12 is connected to a limit block 311, and the limit block 311 and the safety shaft 31 rotate synchronously. A groove 312 is provided at one end of the safety shaft 31 close to the handle 11, and the groove is a straight groove. The groove 312 can drive the safety shaft 31 to rotate. The outer contour of the limit block 311 has a protrusion 313, which is inserted into the notch 132 to prevent the unlocking disk 13 from rotating. The outer contour of the limit block 311 also has a double notch 314, and a bump bead 32 is installed on the inner top of the mounting seat 12 through a mounting plate 321. The bump bead 32 can be stuck in the double notch 314 to prevent the limit block 311 from rotating.

[0029] Two indicator positions 121 are arranged on the outer side surface of the mounting seat 12 for indicating the connection status between the double notches 314 and the bumping beads 32 .

[0030] The unlocking member 2 may further include a lock stopper 25, which is mounted at both ends of the bed frame (not shown). When the berth bed is raised and folded, the lock stopper 25 pushes the lock buckle 42 into the mounting groove. Fig. 9 The lock stopper 25 is a concave piece. The edge of the lock stopper 25 is used to connect the bed frame and push the lock buckle 42 to retract. The concave part of the lock stopper 25 cooperates with the lock buckle 42 to overlap and fix the bed frame (when the lock buckle 42 is extended, it can enter the lock stopper 25 and support the lock stopper 25. A through hole is provided in the middle of the lock stopper 25, and the through hole is for the connecting rod 21 to pass through.

[0031] During assembly, the fixing seat 4 is installed in the vehicle body with fastening screws at both ends of the bed frame, and the mounting seat 12, handle 11, unlocking disk 13, torsion spring 14, safety shaft 31, and limit block 311 are integrated into one body, and then assembled to the outer facade of the bed frame with fasteners, and the lock stopper 25 is installed at both ends of the bed frame, and the connecting rod 21 is connected as a whole with the rotating disk 22, and the rotating disk 22 is installed in the middle part of the bed with fasteners 223. The connecting rod passes through the middle through hole of the lock stopper 25. After assembly, the short pin 131 of the unlocking disk 13 contacts the short pin 222 of the rotating disk 22.

[0032] When unlocking, first use the special key to operate the safety shaft 31 to rotate clockwise to release the safety, so that the protrusion 313 leaves the notch 132. At this time, the limit block 311 is free from the constraint on the unlocking disk 13. Hold the handle 11 and press it clockwise. The handle 11 drives the unlocking disk 13 to rotate, and the short pin 131 drives the rotating disk 22 to rotate, driving the two connecting rods 21 to extend. The front end of the connecting rod 21 passes through the lock stopper 25 and supports the lock buckle 42. The bed frame can pass through the fixed seat 4 from the middle of the two fixed seats 4 and be lowered to complete the unlocking.

[0033] When locking is required: release the handle 11, the torsion spring 14 pushes the handle 11 to reset, the spring 23 pushes the connecting rod 21 to retract, the lock blocks 25 at both ends of the bed frame push the lock buckle 42 to retract, and the bed frame is lifted from the middle of the two fixed seats 4 to above the fixed seats 4, the lock block 25 is placed on the lock buckle 42, and the special key is used to operate the safety shaft 31 to rotate counterclockwise until the bumper 32 and the notch 314 of the outer contour of the limit block 311 are interlocked, and the safety is completed.

Claims

1. A lock for a berth bed, characterized in that: The invention comprises a fixing seat (4) connected to a vehicle body and an unlocking member (2) located in a berth bed, wherein the fixing seat (4) comprises a lock buckle (42) and a support (41), wherein the lock buckle (42) and the support (41) are rotatably connected and provided with a first torsion spring (44), wherein the first torsion spring (44) drives the lock buckle (42) to extend out of the support (41) to form a bottom support structure of the berth bed; wherein the unlocking member (2) comprises a rotating disk (22) and a connecting rod (21), wherein the connecting rod (21) is hinged on the left and right sides of the rotating disk (22), wherein the rotating disk (22) rotates to drive the connecting rods (21) on the left and right sides to extend simultaneously, thereby pushing the lock buckle (42) to retract into the support (41), wherein a spring (23) is sleeved on the end of the connecting rod (21), and the spring (23) pushes the connecting rod (21) to retract into the berth bed.

2. The lock for a berth bed according to claim 1, characterized in that: The unlocking member (2) comprises an unlocking handle (11), the unlocking handle (11) being connected to a first rotating shaft (111), the first rotating shaft (111) penetrating the outer side wall of the berth bed and being rotatably connected to the berth bed, one end of the first rotating shaft (111) extending into the berth bed being connected to an unlocking disk (13), the unlocking disk (13) being provided with a first short pin (131); the rotating disk (22) being provided with a second short pin (222), the first short pin (131) being in contact with the second short pin (222), and the handle pushing the rotating disk to rotate via the first short pin and the second short pin.

3. The lock for a berth bed according to claim 2, characterized in that: The handle (11) is installed via a mounting seat (12), the mounting seat (12) is embedded in the outer side wall of the bunk bed, the first rotating shaft (111) passes through the mounting seat (12), and a second torsion spring (14) is provided between the handle (11) and the mounting seat (12).

4. The lock for a berth bed according to claim 3, characterized in that: The outer contour of the unlocking disk (13) is provided with a first notch (132); the mounting seat is rotatably connected with a safety shaft (31), the safety shaft (31) passes through the mounting seat, one end of the safety shaft (31) passing through the mounting seat (12) is connected to a limit block (311), the outer contour of the limit block (311) is provided with a protrusion (313), the protrusion (313) is inserted into the first notch (132), and prevents the unlocking disk (13) from rotating.

5. The lock for a berth bed according to claim 4, characterized in that: The outer contour of the limit block (311) is provided with a second notch (314), and a mounting seat (12) at the top of the limit block (311) is provided with a bumping bead (32), which is inserted into the second notch (314) to prevent the limit block (311) from rotating.

6. The lock for a berth bed according to claim 4, characterized in that: One end of the safety shaft (31) close to the handle (11) is provided with a groove (312) for driving the safety shaft to rotate.

7. The lock for a berth bed according to claim 5, characterized in that: The mounting seat (12) is provided with indicator positions (121), and the number of the indicator positions (121) is consistent with the number of the second notches (314).

8. The lock for a berth bed according to claim 5, characterized in that: The support (41) is provided with a mounting groove (46) for accommodating a lock buckle, one end of the lock buckle (42) is sleeved with a pin shaft (43), the pin shaft (43) is inserted into the support (41) along the vertical direction of the mounting groove (46), and a screw (45) is provided on the support at the top of the pin shaft (43), and the screw (45) and the pin shaft (43) are in abutment.

9. The lock for a berth bed according to claim 2, characterized in that: The first short pin (131) is parallel to the first rotating shaft (111), and the second short pin (222) is parallel to the second rotating shaft (221) of the rotating disk (22).

10. The lock for a berth bed according to claim 1, characterized in that: The lock for the berth bed comprises a lock stopper (25), which is a concave piece connected to two ends of the berth bed. Before the berth bed is fixed, the edge of the lock stopper (25) pushes the lock buckle (42) to retract into the support (41).

Images