Lock for sleeping berth

Abstract

The utility model discloses a lock for a sleeping berth bed, which comprises a fixed seat connected with a vehicle body and an unlocking piece positioned in the sleeping berth bed, the fixed seat comprises a lock catch and a support, the lock catch is rotatably connected with the support and is provided with a first torsion spring, and the first torsion spring drives the lock catch to extend out of the support to form a bottom support structure of the sleeping berth bed; 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] This utility model relates to a lock, and more particularly to a lock for a sleeper bed. Background Technology

[0002] In rail transit, sleeper compartments are typically tiered, facilitating passenger rest while increasing space utilization. To further improve space utilization, existing sleeper beds employ a folding design. For example, utility model patent application CN220974166U discloses a foldable sleeper bed for rail vehicles. To ensure the stability of the bed during use, a connecting rod is installed along the length of the bed frame, with a limiting rod installed at the end of the connecting rod. A limiting seat is located on the inner wall of the bed frame along the width of the limiting rod. When the bed is in use, the connecting rod is driven, causing the limiting rod to insert into the limiting seat, ensuring bed stability. When the bed is folded, the limiting rod retracts. In the current design, the levers that drive the connecting rod are located at both ends of the bed, and the limiting seats are located on the inner side of the bed, occupying space at both ends and on the inner side of the bed, reducing the usable area of ​​the bed. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to provide a lock for a sleeper bed to solve the technical problem of surface contact in sleeper bed use.

[0004] Technical Solution: The present invention discloses a lock for a sleeper bed, comprising a fixed seat connected to the vehicle body and an unlocking component located inside the sleeper bed. The fixed seat is connected to the vehicle body and located at both ends of the sleeper bed. The fixed seat includes a latch and a support. The latch and the support are rotatably connected and provided with a first torsion spring. The first torsion spring drives the latch to extend out of the support, forming a bottom support structure for the sleeper bed. The unlocking component includes a rotating disk and a connecting rod. The connecting rod is hinged to the left and right sides of the rotating disk. When the rotating disk rotates, it drives the connecting rods on both sides to extend simultaneously, pushing the latch to retract into the support. A spring is sleeved at the end of the connecting rod, and the spring pushes the connecting rod to retract into the sleeper bed.

[0005] Preferably, the unlocking component includes an unlocking handle connected to a first rotating shaft, which passes through the outer sidewall of the sleeper bed and is rotatably connected to the sleeper bed. One end of the first rotating shaft extending into the sleeper bed is connected to an unlocking disc, which is provided with a first short pin. The rotating disc is provided with a second short pin, which contacts the first and second short pins. The handle pushes the rotating disc to rotate through the first and second short pins.

[0006] Preferably, the handle is mounted via a mounting base, which is embedded in the outer sidewall of the sleeper bed. A first rotating shaft passes through the mounting base, and a second torsion spring is provided between the handle and the mounting base.

[0007] Preferably, the outer contour of the unlocking disc has a first notch, and the mounting base is rotatably connected to a safety shaft. The safety shaft passes through the mounting base, and one end of the safety shaft that extends out of the mounting base is connected to a limiting block. The outer contour of the limiting block has a protrusion that inserts into the first notch to prevent the unlocking disc from rotating.

[0008] Preferably, the outer contour of the limiting block is provided with a second notch, and the mounting seat at the top of the limiting block is provided with a ball, which is engaged in the second notch to prevent the limiting block from rotating.

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

[0010] Preferably, the mounting base is provided with indicator positions, and the number of indicator positions is the same as the number of the second notch.

[0011] Preferably, the support is provided with a mounting groove for accommodating the latch, one end of the latch is sleeved with a pin, the pin is inserted into the support along the vertical direction of the mounting groove, and a screw is provided on the support at the top of the pin, the screw and the pin abut against each other.

[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 locking device for the sleeper bed includes a locking stop, which is a concave part connected to both ends of the sleeper bed. Before the sleeper bed is fixed, the edge of the locking stop pushes the lock buckle into the support.

[0014] Beneficial effects: Compared with the prior art, this utility model has the following advantages: 1. Guarantee the usable area of ​​the bed: The fixing mechanism is located at the bottom of the bed and does not occupy the usable area of ​​the bed; 2. The unlocking part is located on the outside of the bed and does not occupy the inner space of the bed, and there is no gap between the bed and the wall; 3. The structure is simple, easy to install, and has a small weight, which can reduce the weight of the bed; 4. It has a safety structure, double insurance, prevents misoperation, and has high safety. Attached Figure Description

[0015] Figure 1 This is an exploded view of the fixed base structure of this utility model;

[0016] Figure 2 This is a front view of the lock of this utility model;

[0017] Figure 3 This is a top view of the lock of this utility model;

[0018] Figure 4 This is an exploded view of the rotating disk structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the linkage structure of this utility model;

[0020] Figure 6 This is an exploded view of the manual component structure of this utility model;

[0021] Figure 7 This is a schematic diagram of the manual component and rotating disk mating structure of this utility model;

[0022] Figure 8 This is a schematic diagram of the external structure of the manual component of this utility model;

[0023] Figure 9 This is a cross-sectional view of the locking structure of this utility model. Detailed Implementation

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0025] The locks for sleeper beds can be mainly divided into three parts: bed fixing components, unlocking components, and safety mechanisms. For example... Figure 1 The sleeper bed fixing component is a fixing seat 4, which is installed on the wall inside the vehicle body or cabin, located at both ends of the sleeper bed. The fixing seat 4 mainly consists of a support 41 and a latch 42. The latch 42 is arranged horizontally. The support 41 has a mounting groove, and the latch 42 is located in the mounting groove 46. One end of the latch 42 is sleeved with a pin 43, and the latch 42 is rotatably connected to the support 41 through the pin 43. There is a torsion spring 44 between the latch 42 and the support 41. When the torsion spring 44 is in the relaxed state, it drives the latch 42 to extend out of the mounting groove, forming a support bracket for the sleeper bed. When the sleeper bed is folded, it passes between the fixing seats 4, and the bottom of both ends rests on the fixing seats 4, thus supporting the sleeper bed. When the sleeper bed needs to be released, the latch 42 is pushed to rotate around the pin 43, overcoming the elastic force of the torsion spring 44 and sinking into the mounting groove, allowing the sleeper bed to be released and unfolded. The pin 43 is arranged vertically along the mounting groove 46, and a horizontal screw 45 is provided on the support 41 at the top of the pin to fix the pin 43 and prevent the pin 43 from moving axially.

[0026] Unlocking component 2 is installed inside the sleeper bed and arranged along the length of the sleeper bed to simultaneously drive the latches 42 at both ends of the sleeper bed to retract. Unlocking component 2 includes connecting rods 21 and a rotating disk 22. The connecting rods 21 are located on the left and right sides of the rotating disk 22 and are 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, thus extending or retracting simultaneously. The rotating disk 22 can also be a rod-shaped structure, with its center mounted via a rotating shaft 221, which is arranged along the thickness (height) direction of the sleeper bed. A spring 23 is sleeved at the end of the connecting rod 21, and a washer 24 is provided. When the spring 23 is in the relaxed state, the spring 23 pushes the connecting rod 21 back into the sleeper bed through the washer 24.

[0027] A short pin 222 is provided at one end of the rotating disk 22, and the short pin 222 is parallel to the rotating shaft 221. The unlocking component 2 also includes a handle 11, which is mounted on a mounting base 12. In use, the mounting base 12 extends through the outer facade of the sleeper bed. The handle 11 has a rotating shaft 111, which is fixedly connected to one end of the handle 11 and rotates synchronously. The rotating shaft 111 passes through the mounting base 12 and is rotatably connected to the mounting base 12. The other end of the rotating shaft 111, which passes through the mounting base 12, is a polygonal shaft connected to an unlocking disc 13. A short pin 131 is provided on the unlocking disc 13, which is parallel to the rotating shaft 111. After assembly, the short pin 131 contacts the short pin 222. Before the sleeper bed is unfolded, the handle 11 is rotated, and the unlocking disc 13 rotates synchronously with the handle 11. The short pin 131 pushes the rotating disc 22 to rotate through the short pin 222, which drives the connecting rod 21 to extend and pushes the latch 42 to retract into the mounting groove 46. The sleeper bed can then pass through the middle of the left and right fixed seats 4 to unfold. A torsion spring 14 is provided between the rotating shaft 111 and the mounting base 12 to enable the handle 11 to return to its original position.

[0028] The outer contour of the unlocking disc 13 has two notches 132. The unlocking component 2 is equipped with a safety assembly 3, which is mounted on the mounting base 12. The safety assembly 3 includes a safety shaft 31, which passes through the mounting base 12 and extends into the bunk bed. One end of the safety shaft 31 extending out of the mounting base 12 is connected to a limiting block 311. The limiting block 311 and the safety shaft 31 rotate synchronously. The end of the safety shaft 31 near the handle 11 has a groove 312, which is a slotted groove that can drive the safety shaft 31 to rotate. The outer contour of the limiting block 311 has a protrusion 313, which inserts into the notch 132 to prevent the unlocking disc 13 from rotating. The outer contour of the limiting block 311 also has two notches 314. A ball bearing 32 is mounted on the top inner side of the mounting base 12 via a mounting plate 321. The ball bearing 32 can be engaged in the two notches 314 to prevent the limiting block 311 from rotating.

[0029] Two indicator positions 121 are provided on the outer side of the mounting base 12 to indicate the connection status of the double notch 314 and the ball bearing 32.

[0030] The unlocking component 2 may also include a locking stop 25, which is installed at both ends of the bed frame (not shown). When the bed is raised and folded, the locking stop 25 pushes the latch 42 into the mounting groove. Figure 9 The locking stop 25 is a concave part. The edge of the locking stop 25 is used to connect the bed frame and push the latch 42 to retract. The concave part of the locking stop 25 and the latch 42 cooperate to make the bed frame overlap and fix it (when the latch 42 extends, it can enter the interior of the locking stop 25 and press against the locking stop 25). The locking stop 25 has a through hole in the middle for the connecting rod 21 to pass through.

[0031] During assembly, the fixing seat 4 is installed in the car body with fastening screws at both ends of the bed frame. The mounting seat 12, handle 11, unlocking disc 13, torsion spring 14, safety shaft 31, and limit block 311 are assembled into one unit. Then, it is assembled to the outer side of the bed frame of the sleeper bed with fasteners. The locking stop 25 is installed at both ends of the bed frame. The connecting rod 21 is connected into one unit with the rotating disc 22. The rotating disc 22 is installed in the middle of the sleeper bed with fasteners 223. The connecting rod passes through the through hole in the middle of the locking stop 25. After assembly, the short pin 131 of the unlocking disc 13 contacts the short pin 222 of the rotating disc 22.

[0032] To unlock, first use the special key to operate the safety shaft 31 to rotate clockwise to release the safety, causing the protrusion 313 to leave the notch 132. At this time, the limit block 311 is released from the constraint of the unlocking disc 13. Hold the handle 11 and press it clockwise. The handle 11 drives the unlocking disc 13 to rotate, and the short pin 131 drives the rotating disc 22 to rotate, causing the two connecting rods 21 to extend. The front end of the connecting rod 21 passes through the lock stop 25 and presses against the lock 42. The bed frame can then pass through the two fixed seats 4 and be lowered to complete the unlocking.

[0033] When locking is required: Release handle 11, torsion spring 14 pushes handle 11 to reset, spring 23 pushes connecting rod 21 to retract, locking stops 25 at both ends of bed frame push lock 42 to retract, lift bed frame from between the two fixed seats 4 to above the fixed seats 4, lock stops 25 rest on lock 42, use special key to operate safety shaft 31 to rotate counterclockwise until the ball stop 32 and the notch 314 on the outer contour of limit block 311 are engaged, and the locking is completed.

Claims

1. A lock for a sleeper bed, characterized in that, The device includes a fixed seat (4) connected to the vehicle body and an unlocking component (2) located inside the sleeper bed. The fixed seat (4) includes a latch (42) and a support (41). The latch (42) and the support (41) are rotatably connected and are provided with a first torsion spring (44). The first torsion spring (44) drives the latch (42) to extend out of the support (41) to form a bottom support structure of the sleeper bed. The unlocking component (2) includes a rotating disk (22) and a connecting rod (21). The connecting rod (21) is hinged to the left and right sides of the rotating disk (22). When the rotating disk (22) rotates, it drives the connecting rods (21) on the left and right sides to extend simultaneously and push the latch (42) to retract into the support (41). A spring (23) is sleeved at the end of the connecting rod (21). The spring (23) pushes the connecting rod (21) to retract into the sleeper bed.

2. The locking device for a sleeper bed according to claim 1, characterized in that, The unlocking component (2) includes an unlocking handle (11), which is connected to a first rotating shaft (111). The first rotating shaft (111) passes through the outer sidewall of the sleeper bed and is rotatably connected to the sleeper bed. One end of the first rotating shaft (111) extending into the sleeper bed is connected to an unlocking disc (13). The unlocking disc (13) is provided with a first short pin (131). The rotating disc (22) is provided with a second short pin (222). The first short pin (131) and the second short pin (222) are in contact. The handle pushes the rotating disc to rotate through the first short pin and the second short pin.

3. The locking device for a sleeper bed according to claim 2, characterized in that, The handle (11) is mounted via a mounting base (12), which is embedded in the outer side wall of the sleeping bed. A first rotating shaft (111) passes through the mounting base (12), and a second torsion spring (14) is provided between the handle (11) and the mounting base (12).

4. The locking device for a sleeper bed according to claim 3, characterized in that, The unlocking disc (13) has a first notch (132) on its outer contour. The mounting base is rotatably connected to a safety shaft (31). The safety shaft (31) passes through the mounting base. One end of the safety shaft (31) that passes through the mounting base (12) is connected to a limiting block (311). The limiting block (311) has a protrusion (313) on its outer contour. The protrusion (313) is inserted into the first notch (132) to prevent the unlocking disc (13) from rotating.

5. The lock for a sleeper bed according to claim 4, characterized in that, The outer contour of the limiting block (311) is provided with a second notch (314), and the mounting seat (12) at the top of the limiting block (311) is provided with a ball (32). The ball (32) is engaged in the second notch (314) to prevent the limiting block (311) from rotating.

6. The lock for a sleeper bed according to claim 4, characterized in that, The safety shaft (31) has a groove (312) at one end near the handle (11) for driving the safety shaft to rotate.

7. The lock for a sleeper bed according to claim 5, characterized in that, The mounting base (12) is provided with an indicator position (121), and the number of indicator positions (121) is the same as the number of the second notch (314).

8. The lock for a sleeper bed according to claim 5, characterized in that, The support (41) is provided with a mounting groove (46) for accommodating the latch. One end of the latch (42) is sleeved with a pin (43). The pin (43) is inserted into the support (41) along the vertical direction of the mounting groove (46). A screw (45) is provided on the support at the top of the pin (43). The screw (45) and the pin (43) abut against each other.

9. The locking device for a sleeper 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 sleeper bed according to claim 1, characterized in that, The locking device for the sleeper bed includes a locking stop (25), which is a concave part and connected to both ends of the sleeper bed. Before the sleeper bed is fixed, the edge of the locking stop (25) pushes the latch (42) to retract into the support (41).

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