Dual-purpose seat for sitting and lying

Abstract

The invention discloses a sitting and lying dual-purpose seat. The sitting and lying dual-purpose seat comprises a headrest, a back cushion, a seat cushion and a base which are sequentially connected from top to bottom, the back cushion is located on the back cushion frame, the seat cushion is located on the seat cushion frame, and the seat cushion frame is fixed to the base through a guide rail. One end of the back cushion frame is connected with the seat cushion frame through a concealed hinge, and the back cushion frame and the seat cushion frame move synchronously; the back cushion frame is connected with the swing rod assembly, and a lock assembly is arranged on the seat cushion frame. The device is simple in structure and easy to operate, and improves travel comfort, reliability and safety.

Description

Technical Field

[0001] This invention relates to the field of rail transportation, and more particularly to a seat that can be used for sitting or reclining. Background Technology

[0002] With my country's rapid economic development, the railway industry has ushered in a new leap forward, and trains have become the preferred mode of transportation for long-distance travel. Currently, train seats and sleeper berths are generally located in separate carriages, catering to different travel needs. Seats are suitable for short-distance travel, and carriages with seats can accommodate up to 100 passengers, making high space utilization. Sleeper berths, on the other hand, are suitable for long-distance travel, but each train can accommodate fewer passengers, resulting in lower utilization. Currently, to increase train capacity during certain peak periods, sleeper berths are often used as seats, thereby increasing the number of passengers carried per train. If sleeper berths could be converted into seats quickly and easily, it would indeed be a good option.

[0003] Patents CN202510671602.8, CN202122945938.9, and CN202010562569.2 all propose a sitting-to-lying conversion scheme, but all require the use of a tea table to connect the opposing seats, involving many components and relatively complex operation steps. Patent CN202510633157.6 proposes a convertible sleeper berth for both sitting and lying down, but this backrest rotation scheme has the problem of a small seat depth in the seated state, greatly reducing the comfort of short-distance travel. Patent CN202221108322.4 proposes a train sleeper berth for both sitting and lying down, but the unlocking method of the berth is relatively complex, and the reliability of the rotatable limiting structure of the second berth in the seated state is not high. Moreover, patents CN202510633157.6 and CN202221108322.4, which involve backrest rotation, both use an external hinge scheme for the seat and backrest cushions, posing a great risk of pinching hands. In addition, the aforementioned patent does not include a retaining structure for the sleeper berth, so safety needs to be improved. Summary of the Invention

[0004] Purpose of the invention: To address the shortcomings and defects of existing technologies, this invention provides a seat that can be used for both sitting and reclining. It has a simple structure, is easy to operate, and improves travel comfort, reliability, and safety.

[0005] Technical solution: The present invention provides a seat that can be used for sitting or reclining, characterized in that: it includes a headrest, a backrest, a seat cushion, and a base connected sequentially from top to bottom; the backrest is located on a backrest frame, the seat cushion is located on a seat cushion frame, and the seat cushion frame is fixed to the base via a guide rail; one end of the backrest frame is connected to the seat cushion frame via a concealed hinge, and the two move synchronously; the backrest frame is connected to a swing arm assembly, and the seat cushion frame is provided with a locking assembly.

[0006] The swing arm assembly includes an upper support, an upper rotating shaft, a swing arm, a lower rotating shaft, a lower support, and a self-resetting support rod; the lower support and the self-resetting support rod are connected to the base.

[0007] The upper support, upper pivot, swing arm, lower pivot, and lower support are connected in sequence; one end of the swing arm assembly is connected to the cushion frame through the upper support, and the other end of the swing arm assembly is fixed to the base through the lower support; when the cushion frame and the seat cushion frame move synchronously, the swing arm assembly restricts the movement trajectory of the cushion frame.

[0008] When the swing arm restricts the downward movement of the cushion frame, the self-resetting support rod slows down the downward speed of the cushion frame. When the swing arm restricts the upward movement of the cushion frame, the self-resetting support rod assists in the upward speed of the cushion frame, thereby achieving the effects of buffering and noise reduction or assisting in lifting.

[0009] The lock assembly includes a handle, a lock housing, a lock hook, a lock stop, and a lock hook pivot.

[0010] The handle and the lock hook are both connected to the lock housing, which is fixed to the seat frame, and the lock stop is fixed to the base.

[0011] In the locked state, the locking hook and locking stop are interlocked and locked, and the seat frame and base are relatively stationary.

[0012] During the unlocking process of converting the seat into a sleeper berth, pulling the handle of the locking assembly pushes the locking hook to rotate around the locking hook pivot axis. At this time, the locking hook tilts upward and is no longer hooked with the locking stop, thereby pulling the seat cushion frame forward and causing the backrest frame to fall. After the seat cushion frame moves to its limit position, pressing the backrest frame continues to fall until the height of the upper pivot center line of the swing arm assembly is lower than the lower pivot. The swing arm assembly is in the "over-dead point" holding structure, and pushing the seat cushion frame in the opposite direction cannot cause the backrest frame to rise and return to its original position.

[0013] During the resetting process of converting a sleeper berth into a seat, the backrest frame is first lifted upwards, causing the swing arm to rotate upwards until the center line of the upper pivot of the swing arm assembly is higher than the lower pivot, and the swing arm assembly is disengaged from the "over-dead point" holding structure area. After that, the seat cushion frame is pushed in the opposite direction or the backrest frame is lifted upwards until the locking hook contacts the locking stop. The locking hook will automatically rotate upwards around the locking hook pivot axis. After the seat cushion frame continues to move a certain distance, the locking hook falls in the opposite direction and hooks and locks with the locking stop.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention adopts a rolling guide rail and a swing arm assembly with a power assist structure, which can greatly reduce the operating force for sitting and lying down conversion; the use of a concealed hinge to connect the seat cushion frame and the backrest frame can realize the synchronous movement and stillness of the two, which not only effectively avoids the risk of hand pinching by exposed hinges, but also greatly simplifies the unlocking and locking operations when switching between sitting and lying down; in the lying down state, the swing arm assembly realizes the "over-dead point" holding structure. When the external force pushes the seat cushion frame to reset, the "over-dead point" structure can cause the swing arm to have a downward movement tendency, thereby always maintaining the lying down state.

[0015] This invention features a concealed hinge connecting the seat and backrest frames, allowing them to move synchronously or remain stationary during seat-to-lie transitions. This simplifies operation and eliminates the risk of pinching fingers associated with exposed side-mounted hinges, resulting in high aesthetics and safety. The seat position utilizes a mechanical locking mechanism. When the locking hook and locking stop of the locking assembly engage, the seat and base remain relatively stationary. Manually pulling the handle of the locking assembly unlocks and pulls the seat, transitioning the seat to a berth position. Conversely, pushing the seat or lifting the backrest converts the berth to a seat position, ending with the locking assembly locking. The entire unlocking and locking process is simple and reliable. The berth position employs a "dead-end" retention structure. The center line of the upper pivot of the swing arm is lower than the lower pivot, causing the external force pushing the seat back to rotate the swing arm downwards, thus maintaining the current berth position. The swing arm assembly is connected to the backrest frame, which not only constrains the movement trajectory of the cushion frame, but also uses its damping self-resetting support rod to buffer and reduce noise when the cushion frame falls, as well as to provide reverse assistance in lifting the cushion frame, making the operation effortless and quiet. A rolling slide rail connects the seat cushion frame and the base. Rolling friction reduces the frictional resistance when the seat cushion frame moves back and forth, thus improving the ease of operation. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the seat configuration of the present invention;

[0017] Figure 2 This is a schematic diagram of the sleeper configuration of the present invention;

[0018] Figure 3 This is a structural diagram of the seat configuration of the present invention (with the seat cushion and backrest hidden).

[0019] Figure 4 This is a schematic diagram of the sleeper configuration of the present invention. Figure 1 (Hidden seat cushion and backrest cushion);

[0020] Figure 5 This is a schematic diagram of the sleeper configuration of the present invention. Figure 2 (Hidden seat cushion and backrest cushion);

[0021] Figure 6 This is a schematic diagram of the connection structure between the concealed hinge and the cushion frame and seat cushion frame of the present invention.

[0022] Figure 7 This is a schematic diagram of the structure of the swing arm assembly of the present invention;

[0023] Figure 8 This is a schematic diagram of the locking state of the locking component of the present invention;

[0024] Figure 9 This is a schematic diagram of the unlocked state of the lock component of the present invention;

[0025] Figure 10 A schematic diagram illustrating the structure for maintaining the "over-dead point" state in the sleeper position according to the present invention;

[0026] In the diagram, 1 is the headrest; 2 is the backrest; 3 is the seat cushion; 4 is the base; 5 is the backrest frame; 6 is the seat cushion frame; 7 is the guide rail; 8 is the rocker arm assembly; 9 is the concealed hinge; 10 is the lock assembly; 801 is the upper support; 802 is the upper pivot; 803 is the rocker arm; 804 is the lower pivot; 805 is the lower support; 806 is the self-resetting support rod; 1001 is the handle; 1002 is the lock housing; 1003 is the lock hook; 1004 is the lock stop; and 1005 is the lock hook pivot. Detailed Implementation

[0027] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] The present invention provides a reclining chair that can be used for sitting or lying down, comprising a headrest 1, a backrest 2, a seat cushion 3, and a base 4 connected sequentially from top to bottom; the backrest 2 is located on a backrest frame 5, the seat cushion 3 is located on a seat cushion frame 6, and the seat cushion frame 6 is fixed to the base 4 via a guide rail 7; one end of the backrest frame 5 is connected to the seat cushion frame 6 via a concealed hinge 9, and the two move synchronously; the backrest frame 5 is connected to a rocker arm assembly 8, and the seat cushion frame 6 is provided with a locking assembly 10.

[0029] The rocker arm assembly 8 of the present invention includes an upper support 801, an upper rotating shaft 802, a rocker arm 803, a lower rotating shaft 804, a lower support 805, and a self-resetting support rod 806; the lower support 805 and the self-resetting support rod 806 are connected to the base 4. The upper support 801, the upper rotating shaft 802, the rocker arm 803, the lower rotating shaft 804, and the lower support 805 are connected in sequence; one end of the rocker arm assembly 8 is connected to the cushion frame 5 through the upper support 801, and the other end of the rocker arm assembly 8 is fixed to the base 4 through the lower support 805; when the cushion frame 5 and the seat cushion frame 6 move synchronously, the rocker arm assembly 8 restricts the movement trajectory of the cushion frame 5. When the swing arm 803 restricts the downward movement of the cushion frame 5, the self-resetting support rod 806 slows down the downward speed of the cushion frame 5. When the swing arm 803 restricts the upward movement of the cushion frame 5, the self-resetting support rod 806 assists in the upward speed of the cushion frame 5, thereby achieving the effects of buffering and noise reduction or assisting in lifting.

[0030] The locking assembly 10 of the present invention includes a handle 1001, a lock housing 1002, a lock hook 1003, a lock stop 1004, and a lock hook pivot 1005. The handle 1001 and the lock hook 1003 are both connected to the lock housing 1002, which is fixed to the seat cushion frame 6. The lock stop 1004 is fixed to the base 4. In the locked state, the lock hook 1003 and the lock stop 1004 interlock, and the seat cushion frame 6 and the base 4 remain relatively stationary.

[0031] During the unlocking process of converting the seat into a sleeper berth, after pulling the handle 1001 of the locking assembly 10, the handle 1001 pushes the locking hook 1003 to rotate around the axis of the locking hook pivot 1005. At this time, the locking hook 1003 tilts upward and is no longer hooked with the locking stop 1004, thereby pulling the seat cushion frame 6 forward and causing the backrest frame 5 to fall. After the seat cushion frame 6 moves to its limit position, press the backrest frame 5 to continue falling until the height of the center line of the upper pivot 802 of the rocker arm assembly is lower than that of the lower pivot 804. The rocker arm assembly 8 is in the "over-dead point" holding structure, and pushing the seat cushion frame 6 in the opposite direction cannot cause the backrest frame 5 to rise and reset.

[0032] During the resetting process of converting the sleeper berth into a seat, the backrest frame 5 is first lifted upwards, causing the swing arm 803 to rotate upwards until the center line of the upper pivot 802 of the swing arm assembly is higher than the lower pivot 804, and the swing arm assembly 8 is disengaged from the "over-dead point" holding structure area; thereafter, the seat cushion frame 6 is pushed in the opposite direction or the backrest frame 5 is lifted upwards until the locking hook 1003 contacts the locking stop 1004. The locking hook 1003 will automatically rotate upwards around the axis of the locking hook pivot 1005. After the seat cushion frame 6 continues to move a certain distance, the locking hook 1003 falls in the opposite direction and hooks and locks with the locking stop 1004.

[0033] The above example illustrates a single-person seat implementation plan. By moving the seat cushion forward and lowering the entire backrest (including the headrest), the fore-and-aft distance is increased, thus enabling the switching between sitting and reclining positions. This structure can also be applied to multi-person seats, where the lateral length of the existing seat is increased to three times. The seat backrest can be designed as a two-piece mechanism, where moving the seat cushion forward only requires simultaneously lowering the lower part of the backrest, thereby increasing the seat depth and converting the seat into a single-person berth.

[0034] This invention employs a rolling guide rail and a swing arm assembly with a power assist structure, which can significantly reduce the operational force required for switching between sitting and lying positions. An internal hinge connects the seat and backrest frames, enabling synchronized movement and stillness of both. This not only effectively avoids the risk of fingers being pinched by exposed hinges but also greatly simplifies the unlocking and locking operations during the sitting-to-lying transition. In the lying position, the swing arm assembly achieves a "dead-point" holding structure. When an external force pushes the seat frame to return to its original position, the "dead-point" structure causes the swing arm to move downwards, thus maintaining the lying position at all times.

[0035] This invention features a concealed hinge connecting the seat and backrest frames, allowing them to move synchronously or remain stationary during seat-to-lie transitions. This simplifies operation and eliminates the risk of pinching fingers associated with exposed side-mounted hinges, resulting in high aesthetics and safety. The seat position utilizes a mechanical locking mechanism. When the locking hook and locking stop of the locking assembly engage, the seat and base remain relatively stationary. Manually pulling the handle of the locking assembly unlocks and pulls the seat, transitioning the seat to a berth position. Conversely, pushing the seat or lifting the backrest converts the berth to a seat position, ending with the locking assembly locking. The entire unlocking and locking process is simple and reliable. The berth position employs a "dead-end" retention structure. The center line of the upper pivot of the swing arm is lower than the lower pivot, causing the external force pushing the seat back to rotate the swing arm downwards, thus maintaining the current berth position. The swing arm assembly is connected to the backrest frame, which not only constrains the movement trajectory of the cushion frame, but also uses its damping self-resetting support rod to buffer and reduce noise when the cushion frame falls, as well as to provide reverse assistance in lifting the cushion frame, making the operation effortless and quiet. A rolling slide rail connects the seat cushion frame and the base. Rolling friction reduces the frictional resistance when the seat cushion frame moves back and forth, thus improving the ease of operation.

Claims

1. A reclining chair, characterized in that: It includes a headrest (1), a backrest (2), a seat cushion (3), and a base (4) connected from top to bottom; the backrest (2) is located on the backrest frame (5), the seat cushion (3) is located on the seat cushion frame (6), and the seat cushion frame (6) is fixed to the base (4) by a guide rail (7); one end of the backrest frame (5) is connected to the seat cushion frame (6) by a concealed hinge (9), and the two move synchronously; the backrest frame (5) is connected to the swing arm assembly (8), and the seat cushion frame (6) is provided with a locking assembly (10).

2. The reclining chair according to claim 1, characterized in that: The swing arm assembly (8) includes an upper support (801), an upper rotating shaft (802), a swing arm (803), a lower rotating shaft (804), a lower support (805), and a self-resetting support rod (806); the lower support (805) and the self-resetting support rod (806) are connected to the base (4).

3. The reclining chair according to claim 2, characterized in that: The upper support (801), upper pivot (802), swing rod (803), lower pivot (804), and lower support (805) are connected in sequence; one end of the swing rod assembly (8) is connected to the cushion frame (5) through the upper support (801), and the other end of the swing rod assembly (8) is fixed to the base (4) through the lower support (805); when the cushion frame (5) and the seat cushion frame (6) move synchronously, the swing rod assembly (8) restricts the movement trajectory of the cushion frame (5).

4. The reclining chair according to claim 3, characterized in that: When the swing arm (803) restricts the downward movement of the cushion frame (5), the self-resetting support rod (806) slows down the downward speed of the cushion frame (5). When the swing arm (803) restricts the upward movement of the cushion frame (5), the self-resetting support rod (806) assists the upward speed of the cushion frame (5), thereby achieving the effects of buffering and noise reduction or assisting in lifting.

5. The reclining chair according to claim 1, characterized in that: The lock assembly (10) includes a handle (1001), a lock housing (1002), a lock hook (1003), a lock stop (1004), and a lock hook pivot (1005).

6. The reclining chair according to claim 5, characterized in that: The handle (1001) and the lock hook (1003) are both connected to the lock shell (1002), the lock shell (1002) is fixed on the seat frame (6), and the lock stop (1004) is fixed on the base (4).

7. The reclining chair according to claim 6, characterized in that: In the locked state, the locking hook (1003) and the locking stop (1004) are locked together, and the seat frame (6) and the base (4) are relatively stationary.

8. The reclining chair according to any one of claims 1-7, characterized in that: During the unlocking process of converting the seat into a sleeper, after pulling the handle (1001) of the locking assembly (10), the handle (1001) pushes the locking hook (1003) to rotate around the axis of the locking hook pivot (1005). At this time, the locking hook (1003) tilts upward and no longer hooks with the locking stop (1004), thereby pulling the seat cushion frame (6) forward and causing the backrest frame (5) to fall. After the seat cushion frame (6) moves to the limit position, press the backrest frame (5) to continue falling until the height of the center line of the upper pivot (802) of the swing arm assembly is lower than the lower pivot (804). The swing arm assembly (8) is in the "over-dead point" holding structure, and pushing the seat cushion frame (6) in the opposite direction cannot cause the backrest frame (5) to rise and reset.

9. The reclining chair according to claim 8, characterized in that: During the resetting process of converting the sleeper into a seat, the backrest frame (5) is first lifted upwards, and the swing arm (803) is driven to rotate upwards until the center line of the upper pivot (802) of the swing arm assembly is higher than the lower pivot (804), and the swing arm assembly (8) is disengaged from the "over-dead point" holding structure area; thereafter, the seat cushion frame (6) is pushed in the opposite direction or the backrest frame (5) is lifted upwards until the locking hook (1003) contacts the locking stop (1004). The locking hook (1003) will automatically rotate upwards around the axis of the locking hook pivot (1005). After the seat cushion frame (6) continues to move a certain distance, the locking hook (1003) falls in the opposite direction and hooks and locks with the locking stop (1004).

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