Liftable sleeping berth bed

Abstract

The liftable sleeping berth bed comprises a bed board assembly, the two ends of the bed board are connected with a wall through hinge assemblies, each hinge assembly comprises a first connecting rod and a second connecting rod, and the second connecting rods are located between the first connecting rods and the bed board assembly; the first connecting rod, the second connecting rod and a hinge shaft of the bed board assembly, and the first connecting rod, the second connecting rod and a hinge shaft of the wall define a parallelogram; with the hinge point of the connecting rod and the wall as a reference, the bed board assembly can ascend above the hinge point and descend below the hinge point, the lifting stroke is doubled, the length of the connecting rod is shortened, and the radius required by ascending, descending and rotating of the bed board assembly is reduced.

Description

Technical Field

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

[0002] In the rail transit industry, traditional sleeper beds are mostly fixed structures or flip structures. Traditional fixed structure beds are fixed and cannot be moved during the day or at night. Therefore, during the day, the fixed setting of the upper and lower berths makes the activity space relatively narrow, and passengers can only lie on their respective beds, affecting the riding comfort during the day. Traditional flip beds have a flipping action when in use, which can easily cause items on the bed to fall off. The items on the bed need to be removed or tied before use, which is not a good user experience.

[0003] The invention patent application with publication number CN 112977221 A discloses a multifunctional berth system for a car, in which a panel is divided in the berth area as a table board, and a parallelogram linkage mechanism is arranged on the bottom of the table board. When the table board is raised, it serves as a table top, and the table board is lowered to be flush with the berth area to form a berth bed. In this scheme, the double connecting rods that drive the table board to rise and fall are located in the same plane. The table board can only rise relative to the berth plane and cannot fall below the berth plane. The lifting stroke of the table board depends entirely on the length of the connecting rod. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a liftable berth bed to reduce the length of the connecting rod and increase the lifting stroke.

[0005] Technical solution: The liftable berth bed described in the present invention comprises a bed board assembly, wherein both ends of the bed board are connected to a wall via a hinge assembly, wherein the hinge assembly comprises a first connecting rod and a second connecting rod, wherein the second connecting rod is located between the first connecting rod and the bed board assembly, and the hinge axes of the first connecting rod, the second connecting rod and the bed board assembly, and the hinge axes of the first connecting rod, the second connecting rod and the wall form a parallelogram.

[0006] Preferably, in order to prevent the parallelogram of the hinge assembly from forming a straight line during the lifting and lowering of the bed board assembly, which would lead to unstable movement, the height of the second connecting rod is lower than that of the first connecting rod, that is, the hinge axes of the first connecting rod and the second connecting rod are arranged in high and low positions.

[0007] Preferably, in order to maximize the usable space at both ends of the bed board assembly when the bed board assembly is in the lowered position, one end of the first connecting rod and the second connecting rod hinged to the bed board assembly is bent, the bed board assembly is lowered, and the two connecting rods are close to the wall.

[0008] Preferably, in order to achieve descent buffering and reduce the force required to lift the bed board assembly, the first connecting rod or the second connecting rod is provided with a first spring for connecting to the wall at one end close to the wall.

[0009] Preferably, in order to ensure stability in the lowered position, a support member for connecting to the wall is further included, and when the bed board assembly is in the lowered position, the support member supports the bottom of the bed board assembly.

[0010] Preferably, in order to ensure the stability of the raised position, it also includes a lock stop assembly for fixing to the wall, the lock stop assembly includes a support, a lock buckle, the bottom of the lock buckle rotates with the support, a second spring is provided between the lock hook and the support, and lock hooks are provided at both ends of the bed board assembly. During the rising process of the bed board assembly, the lock hook pushes the lock buckle to squeeze the second spring. When it is in the raised position, the lock buckle is pushed out by the second spring and supported at the bottom of the lock hook.

[0011] Preferably, in order to facilitate unlocking, a push rod is provided inside the bed board assembly, and a handle for driving the push rod to slide is provided on the outside of the bed board assembly. The push rod is pushed out of the bottom of the bed board assembly, squeezing the lock buckle to release the bed board assembly.

[0012] Preferably, in order to facilitate the installation of the bed board assembly, a mounting seat is further included, and the first connecting rod, the second connecting rod and the first spring are connected to the wall through the mounting seat.

[0013] Preferably, in order to ensure synchronous movement of both ends of the bed board assembly, a synchronization rod is provided inside the bed board assembly, and both ends of the synchronization rod are connected to the hinge shaft of the second connecting rod.

[0014] Preferably, in order to ensure the safety of the user and prevent the bed board assembly from being too high and affecting the rising position, a guardrail is hinged on the outer side of the bed board assembly.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following advantages: 1. The length of the connecting rod is reduced and the lifting stroke is increased: with the hinge point of the connecting rod and the wall as a reference, the bed board assembly can rise above the hinge point and fall below the hinge point, the lifting stroke is doubled, the length of the connecting rod is shortened, and the radius required for the rising and falling rotation of the bed board assembly is reduced, which is suitable for sleeper cars with limited space; 2. The rising and falling process is smooth and the bed board assembly remains horizontal without flipping or tilting, which will not cause items on the bed board assembly to fall off; 3. There is no gap between the bed board assembly and the wall, and the use space is large: whether it is in the rising or lowering position, the bed board assembly can fit the wall, and there is no connecting rod blocking both ends of the bed board assembly to ensure the use space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the liftable berth bed of the present invention in the raised state;

[0017] Figure 2 It is a side view of the liftable berth bed of the present invention in the raised state;

[0018] Figure 3 This is the structural schematic diagram of the hinge assembly;

[0019] Figure 4 It is a side view of the liftable berth bed of the present invention in a lowered state;

[0020] Figure 5 It is a side sectional view of the liftable berth bed of the present invention in a lowered state;

[0021] Figure 6 It is a front cross-sectional view of the liftable berth bed of the present invention in a lowered state;

[0022] Figure 7 It is a schematic diagram of the structure of the gear lock assembly;

[0023] Figure 8 It is a cross-sectional view of the lock gear assembly structure. DETAILED DESCRIPTION

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

[0025] like Figures 1 to 3 A tumble bed is provided, which is mainly composed of a bed board assembly 3 and a hinge assembly 1 / 2 for driving the bed board assembly 3 to rise and fall. The hinge assembly 1 / 2 is respectively located at both ends of the bed board assembly 3, one end of which is hinged to the bed board assembly 3, and the other end of which is hinged to a mounting seat 14, and the mounting seat 14 is fixed to the vehicle body. The top of the bed board assembly 3 is a mattress 4, and a guardrail is hinged on the outside to prevent the user of the bed board assembly 3 from falling.

[0026] like Figure 3 The hinge assembly 1 / 2 is mainly composed of a connecting rod 15 and a connecting rod 16 of the same shape. The connecting rod 15 and the connecting rod 16 are respectively connected to the two sides of the support plate of the mounting seat 14. The connecting rod 15 is connected to the bed board assembly 3 through a rotating hinge axis B, and the connecting rod 16 is connected to the bed board assembly 3 through a rotating hinge axis A. The connecting rod 15 is connected to the mounting seat 14 through a rotating hinge axis D, and the connecting rod 16 is connected to the mounting seat 14 through a rotating hinge axis C, forming a set of parallelogram connecting rod mechanisms. By utilizing the parallelogram connecting rod mechanism and the eccentric arrangement of the connecting rods 15 and 16, the bed can always remain in a horizontal state during the lifting process, thereby preventing the mattress 4 or other items placed on the bed board assembly 3 from falling during the lifting process, while ensuring that the bed board assembly can rise and fall, thereby increasing the lifting stroke.

[0027] The connecting rod 15 and the connecting rod 16 are staggered a certain distance up and down and left and right. Specifically, the connecting rod 15 is located between the connecting rod 16 and the bed board assembly 3. The height of the connecting rod 15 is lower than that of the connecting rod 16. By lowering the height of the connecting rod 15, the dead point line between the hinge shafts A, B, C, and D is transferred to outside the position of the entire process of bed rising and falling, thereby preventing the hinge shaft from being located on the dead point line during the falling and rising process of the bed board assembly 3, causing the bed board assembly 3 to become stuck or unstable and unable to move normally.

[0028] The connecting rods 15 and 16 are bent at one end near the bed board assembly 3, that is, the connecting rods 15 and 16 are both L-shaped. The bending arrangement, on the one hand, allows the bed board assembly 3 to have a larger use space, and on the other hand, the bending portion of the connecting rod 15 leaves installation space for the hinge axis A between the connecting rod 16 and the bed board assembly 3, so that the bed board assembly 3 in the lowered position can fit more closely to the wall, reducing the gap between the bed board assembly 3 and the wall. The ends of the connecting rods 15 and 16 near the mounting seat 14 are slightly bent, and after the bed board assembly 3 is lowered, the connecting rods 15 and 16 can be hidden in the mounting seat 14.

[0029] A spring 17 is provided between the top of the mounting seat 14 and the connecting rod 15 or the connecting rod 16. The spring 17 forms a damping device to balance the influence of the gravity moment of the bed board assembly 3 and the mattress 4. The lifting action of the bed board assembly 3 can be achieved with a relatively small operating force, and it also prevents the bed board assembly 3 from being affected by gravity during descent and falling too fast to hit the operator.

[0030] like Figure 4 , Figure 5 A synchronization rod 10 is arranged between the hinge assembly 1 and the hinge assembly 2 at both ends of the bed board assembly 3 to achieve consistency of the hinge movements on both sides during the bed lifting process. The synchronization rod 10 is placed inside the bed board assembly 3, and its end is connected to the hinge axis of the hinge axis B. A cover 7 / 8 is arranged outside the mounting seat 14 to shield the internal parts of the hinge assembly and protect the user from being hurt by the parts.

[0031] A support assembly 9 is provided below the mounting seat 14 . When the hinge shafts A and B rotate to below the hinge shafts C and D, that is, when the bed board assembly 3 is in the lowered position, both ends and the inner side of the bed board assembly 3 are placed on the support assembly 9 .

[0032] A locking assembly 5 / 6 is provided above the mounting seat 14, and the locking assembly includes a lock buckle 11. The bottom end of the lock buckle 11 is rotatably connected to the vehicle body through a support, and a torsion spring is provided between the lock buckle 11 and the support to keep the top of the lock buckle 11 away from the support. Lock hooks 12 are provided at both ends of the bed board assembly 3. When the hinge shafts A and B rotate to above the hinge shafts C and D, that is, when the bed board assembly 3 is in the raised position, the lock hooks 12 are located at the upper end of the lock buckle 11 to prevent the bed board assembly 3 from falling.

[0033] A push rod 13 parallel to the synchronization rod 10 is provided inside the bed board assembly 3, and a rotating handle 18 is connected to the outside of the bed board assembly 3. The handle 18 is used to drive the push rod 13 to slide left and right. By rotating the handle, the push rods 13 at both ends of the bed board assembly 3 are driven to slide out simultaneously. The push rod 13 pushes the lock buckle 11 to rotate, compresses the torsion spring, and releases the lock hook 12, so that the bed board assembly 3 can be lowered.

[0034] When the berth is not needed, the bed can be raised outside the personnel activity area. When the berth is needed, the bed can be lowered to the berth position. The liftable berth bed is equipped with a damping device, which is easy to operate and labor-saving. This solution provides a more flexible setting for the use of the space in the vehicle. Compared with the existing flip berth bed, the liftable berth bed moves more smoothly, without worrying about items falling off the bed, etc., providing a better user experience.

Claims

1. A foldable berth bed, comprising a bed board assembly (3), characterized in that: The two ends of the bed board assembly (3) are connected to the wall via a hinge assembly, the hinge assembly comprises a first connecting rod (16) and a second connecting rod (15), the second connecting rod (15) is located between the first connecting rod (16) and the bed board assembly (3), the hinge axis of the first connecting rod (16), the second connecting rod (15) and the bed board assembly (3), and the hinge axis of the first connecting rod (16), the second connecting rod (15) and the wall enclose a parallelogram.

2. The liftable berth bed according to claim 1, characterized in that: The height of the second connecting rod (15) is lower than the height of the first connecting rod (16).

3. The liftable berth bed according to claim 2, characterized in that: One end of the first connecting rod (16) and the second connecting rod (15) hinged to the bed board assembly (3) is bent.

4. The liftable berth bed according to claim 1, characterized in that: A first spring (17) for connecting to the wall is provided at one end of the first connecting rod (16) or the second connecting rod (15) close to the wall.

5. The liftable berth bed according to claim 1, characterized in that: It also comprises a support member (9) for connecting to a wall; when the bed board assembly (3) is in the lowered position, the support member (9) supports the bottom of the bed board assembly (3).

6. The elevating berth bed according to claim 1, characterized in that: The invention also comprises a locking block assembly (5) for fixing on a wall, the locking block assembly comprising a support, a lock buckle (11), the bottom of the lock buckle rotates with the support, a second spring is arranged between the lock buckle and the support, and locking hooks (12) are arranged at both ends of the bed board assembly, during the rising process of the bed board assembly (3), the lock hook (12) pushes the lock buckle (11) to squeeze the second spring, and when in the rising position, the lock buckle (11) is pushed out by the second spring and supported at the bottom of the lock hook (12), thereby locking the bed board assembly (3).

7. The elevating bed according to claim 6, characterized in that: The bed board assembly (3) is provided with a push rod (13) inside, and a handle (18) for driving the push rod to slide is provided on the outside of the bed board assembly (3). The push rod is pushed out of the bottom of the bed board assembly (3), squeezing the lock buckle (11) to release the bed board assembly.

8. The elevating berth bed according to claim 4, characterized in that: It also includes a mounting seat (14), and a first connecting rod (16), a second connecting rod (15), and a first spring (17) are connected to a wall via the mounting seat.

9. The elevating berth bed according to claim 1, characterized in that: A synchronization rod (10) is provided inside the bed board assembly (3), and both ends of the synchronization rod (10) are connected to the hinge shaft of the second connecting rod (15).

10. The elevating bed according to claim 1, characterized in that: A guardrail is hingedly connected to the outer side of the bed board assembly (3).

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