Chair with rotatable back cushion

Abstract

The utility model relates to a chair with a rotatable back cushion, which is used for solving the technical problems that in the actual use process of some chairs mentioned in the background technology, although the front and back positions of the back cushion can be adjusted, the vertical position and the inclination angle of a waist cushion cannot be adjusted according to the requirements of a user, and the comfort and the practicability are low. Comprising a seat plate and a backrest arranged on the rear portion of the seat plate, a square groove is formed in the center of the backrest, a first mounting block and a second mounting block are vertically arranged in the two sides of the backrest in a sliding mode respectively, a same rotating shaft is rotatably arranged in the first mounting block and the second mounting block in a penetrating mode, and a back cushion is fixedly arranged on the rotating shaft and located in the square groove. A locking assembly is arranged in the first mounting block and used for locking rotation of the rotating shaft, an inserting groove is formed in the second mounting block, and the end of the rotating shaft can be inserted into the inserting groove so that the rotating shaft can be mounted.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture, in particular to a chair with a rotatable cushion. Background Art

[0002] Chairs are an important tool in daily life, but many seats either do not have cushions or the cushions are fixed to the backrests and cannot be adjusted. Different users have different needs or preferences for comfort, such as the position and tilt angle of the cushions, and the cushions in existing seats cannot meet the needs of different users, which will reduce the user experience.

[0003] There are some office chairs with adjustable lumbar support in the prior art. For example, the utility model patent document with authorization announcement number "CN215820307U" and patent name "A chair with adaptively adjustable lumbar support" discloses a chair, which includes a lumbar support and an elastic member. An adaptively adjustable elastic member is arranged between the lower end of the lumbar support and the leaning surface to keep the lower end of the lumbar support suspended.

[0004] However, in actual use, although the above patent document can adjust the front and rear position of the backrest, it cannot adjust the vertical position and tilt angle of the lumbar support according to the needs of the user, and the comfort and practicality are low. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a chair with a rotatable cushion, which is used to solve the technical problem that some chairs mentioned in the background technology can adjust the front and rear position of the backrest during actual use, but cannot adjust the vertical position and inclination angle of the lumbar support according to user needs, resulting in low comfort and practicality.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A chair with a rotatable cushion comprises a seat plate and a backrest arranged at the rear of the seat plate, a square groove is opened in the center of the backrest, a first mounting block and a second mounting block are respectively provided on both sides of the backrest for vertical sliding, a same rotating shaft is rotatably passed through the first mounting block and the second mounting block, a cushion is fixed on the rotating shaft and the cushion is located in the square groove, a locking assembly is provided in the first mounting block for locking the rotation of the rotating shaft, and a plug-in groove is provided in the second mounting block, and the plug-in groove is used for inserting the end of the rotating shaft to install the rotating shaft.

[0008] Working principle:

[0009] When in use, the user can vertically slide the first mounting block and the second mounting block according to their needs to adjust the cushion to a suitable position;

[0010] Then rotate the cushion to adjust the inclination angle of the cushion, and then start the locking component to lock the cushion.

[0011] After using for a period of time, the cushion can be disassembled by taking the rotating shaft out of the plug-in slot for easy cleaning.

[0012] Beneficial effects:

[0013] In this solution, by providing a first mounting block and a second mounting block that can slide vertically, the vertical position of the cushion can be adjusted to suit different users;

[0014] By providing a rotating shaft and a locking assembly, the inclination angle of the back cushion can be adjusted, and the back cushion can be locked by the locking assembly;

[0015] By providing the inserting groove, the end of the rotating shaft can be taken out from the inserting groove, and the back cushion can be disassembled for easy cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the front structure of the middle backrest and cushion;

[0018] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0019] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at point B.

[0020] In the above drawings: seat plate 1, backrest 2, first mounting block 3, second mounting block 4, rotating shaft 5, first slide groove 6, locking block 7, first mounting groove 8, first spring 9, first plug-in block 10, first through hole 11, locking groove 12, second through hole 13, first sliding groove 14, second slide groove 15, disassembly block 16, second mounting groove 17, second spring 18, second plug-in block 19, plug-in groove 20, second sliding groove 21, motor 22, transmission shaft 23, first top support block 24, first working groove 25, second working groove 26, slide rod 27, second top support block 28, cushion 29. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Example:

[0023] like Figure 1 to Figure 4As shown, a chair with a rotatable cushion comprises a seat plate 1 and a backrest 2 arranged at the rear of the seat plate 1, a square groove is opened in the center of the backrest 2, a first mounting block 3 and a second mounting block 4 are respectively vertically slidably provided on both sides of the backrest 2, a same rotating shaft 5 is rotatably passed through the first mounting block 3 and the second mounting block 4, a cushion 29 is fixed on the rotating shaft 5 and the cushion 29 is located in the square groove, a locking assembly is provided in the first mounting block 3 for locking the rotation of the rotating shaft 5, and a plug-in groove 20 is provided in the second mounting block 4, and the plug-in groove 20 is used for inserting the end of the rotating shaft 5 to install the rotating shaft 5.

[0024] In the present solution, by providing a first mounting block 3 and a second mounting block 4 that can slide vertically, the vertical position of the cushion 29 can be adjusted to suit different users; by providing a rotating shaft 5 and a locking assembly, the inclination angle of the cushion 29 can be adjusted, and the cushion 29 can be locked by the locking assembly; by providing a plug-in slot 20, the end of the rotating shaft 5 can be taken out of the plug-in slot 20, and the cushion 29 can be disassembled for easy cleaning.

[0025] like Figure 3 As shown, a horizontal first slide groove 6 is opened at one end of the rotating shaft 5, a locking block 7 is slidably provided in the first slide groove 6, a first installation groove 8 is opened in the locking block 7, a first spring 9 is fixedly provided in the first installation groove 8, and a first plug-in block 10 is fixedly provided at the other end of the first spring 9. A second through hole 13 is opened on the side wall of the rotating shaft 5, and an annular first sliding groove 14 distributed around the circumferential direction of its inner wall is opened inside the first mounting block 3. The first slide groove 6 and the second through hole 13 are connected with the first sliding groove 14, and the first plug-in block 10 can slide in the first sliding groove 14. After the first plug-in block 10 slides in the first slide groove 6 and is inserted into the first sliding groove 14 through the second through hole 13, the rotating shaft 5 is driven to rotate while the locking block 7 is rotated.

[0026] By setting the first sliding groove 6, the locking block 7, the first installation groove 8, the first spring 9, the first plug-in block 10, the second through hole 13 and the first sliding groove 14, the locking block 7 is slid horizontally, and the first plug-in block 10 is inserted into the first sliding groove 14 through the second through hole 13 as the locking block 7 slides, so that the locking block 7 and the rotating shaft 5 form a whole. The user drives the rotating shaft 5 to rotate by rotating the locking block 7, and the rotation of the rotating shaft 5 drives the cushion 29 to rotate, thereby realizing the adjustment of the inclination angle of the cushion 29.

[0027] like Figure 3As shown, the second through hole 13 is a square hole, the two sides of the first plug-in block 10 facing the moving direction of the locking block 7 are arranged as inclined surfaces, and the other two sides are vertical surfaces, and the inclined surfaces on both sides are close to each other in the direction away from the first spring 9. The structure of the first plug-in block 10 is arranged in this way, so that the locking block 7 can slide horizontally in the first slide groove 6, and when the locking block 7 is rotated, the locking block 7 is clamped in the second through hole 13 and will not fall off from the second through hole 13, thereby achieving the purpose of driving the cushion 29 to rotate by rotating the locking block 7.

[0028] like Figure 3 As shown, the side wall of the rotating shaft 5 is also provided with a first through hole 11, and the first through hole 11 is arranged on the side of the second through hole 13 away from the end of the rotating shaft 5. The locking assembly includes a locking block 7 and a plurality of locking grooves 12, and the plurality of locking grooves 12 are all square grooves and are evenly spaced around the circumferential direction and are opened in the first mounting block 3. The first slide groove 6, the first through hole 11 and the locking groove 12 are connected, and the first plug-in block 10 is used to be inserted into the locking groove 12 through the first through hole 11 as the locking block 7 slides in the first slide groove 6, so that the rotating shaft 5 is relatively stationary.

[0029] By setting the first through hole 11 and the locking groove 12, when the rotating shaft 5 needs to be locked, the user pushes the locking block 7, thereby driving the first plug-in block 10 to be inserted into the corresponding locking groove 12 through the first through hole 11 as the locking block 7 slides in the first sliding groove 6, thereby locking the rotation of the rotating shaft 5.

[0030] like Figure 4 As shown, a horizontal second slide groove 15 is provided at the other end of the rotating shaft 5, a disassembly block 16 is slidably provided in the second slide groove 15, a second mounting groove 17 is provided on the disassembly block 16, a second spring 18 is fixedly provided in the second mounting groove 17, a second plug-in block 19 is fixedly provided at the other end of the second spring 18, the second plug-in block 19 has inclined surfaces on both sides facing the moving direction of the disassembly block 16, and the other two sides are vertical surfaces, and the inclined surfaces on both sides approach each other in a direction away from the second spring 18, a second sliding groove 21 distributed around the circumferential direction is provided in the second mounting block 4, the second plug-in block 19 can slide in the second sliding groove 21, and the second plug-in block 19 is used to slide out of the second slide groove 15 with the disassembly block 16 and enter the plug-in groove 20, thereby being plugged into the second sliding groove 21.

[0031] By providing the second slide groove 15, the disassembly block 16, the second installation groove 17, the second spring 18, the second plug-in block 19 and the second slide groove 21, when installing the cushion 29, the user pushes the disassembly block 16 into the plug-in groove 20, and the second plug-in block 19 slides out of the second slide groove 15 along with the disassembly block 16 and enters the plug-in groove 20, and then is plugged into the second slide groove 21, so that the end of the rotating shaft 5 is plugged and installed, and the second plug-in block 19 can rotate in the second slide groove 21 while the rotating shaft 5 is rotated.

[0032] like Figure 2 As shown, the backrest 2 is provided with a first working groove 25 and a second working groove 26 on both sides, a motor 22 is provided at the bottom of the backrest 2, the output end of the motor 22 is connected to a vertical transmission shaft 23, a first top support block 24 is threadedly connected to the transmission shaft 23, the top of the first top support block 24 is fixedly connected to the bottom of the first mounting block 3, the first top support block 24 is vertically slidably arranged in the first working groove 25, a vertical slide bar 27 is fixedly arranged in the second working groove 26, a second top support block 28 is slidably arranged on the slide bar 27, and the top of the second top support block 28 is fixedly connected to the bottom of the second mounting block 4. By providing the first working groove 25, the second working groove 26, the motor 22, the transmission shaft 23, the first top support block 24, the slide bar 27 and the second top support block 28, the motor 22 is started to drive the first mounting block 3 and the second mounting block 4 to move vertically, so as to adjust the vertical position of the cushion 29, this method is automated and mechanized, and is convenient for users to operate.

[0033] Working principle:

[0034] When in use, the motor 22 is started, and the output end of the motor 22 drives the transmission shaft 23 to rotate. The rotation of the transmission shaft 23 drives the first mounting block 3 and the second mounting block 4 to move vertically. The vertical movement of the first mounting block 3 and the second mounting block 4 drives the cushion 29 to move vertically, thereby adjusting the position of the cushion 29 in the vertical direction.

[0035] Then the user pulls the locking block 7 outwards, and the locking block 7 moves in the first slide groove 6 while driving the first plug-in block 10 close to the second through hole 13. At this time, the first spring 9 extends and pushes the first plug-in block 10 to move through the second through hole 13 into the first sliding groove 14. At this time, the first plug-in block 10 is clamped in the second through hole 13. Then the user rotates the locking block 7, and the locking block 7 drives the rotating shaft 5 to rotate while rotating. At this time, the inclination angle of the cushion 29 changes accordingly;

[0036] Then the user pushes the locking block 7 inwards, and the locking block 7 slides in the first slide groove 6 while driving the first plug-in block 10 close to the first through hole 11. At this time, the first spring 9 extends and pushes the first plug-in block 10 to move through the first through hole 11 into the locking groove 12. At this time, the first plug-in block 10 is inserted into the corresponding locking groove 12, so that the locking block 7, the rotating shaft 5 and the first mounting block 3 are relatively stationary, and then the rotating shaft 5 is relatively stationary, and the cushion 29 is locked.

[0037] When the cushion 29 needs to be removed, the user pulls the removal block 16 to move into the second slide groove 15. At this time, the movement of the removal block 16 squeezes the second plug-in block 19, and the second spring 18 contracts and pulls the second plug-in block 19 to move into the second installation groove 17. The second plug-in block 19 is disconnected from the second sliding groove 21. Then the user pulls out the locking block 7 from the first slide groove 6 and takes out the other end of the shaft 5 from the first installation block 3, thereby completing the removal of the cushion 29. The entire operation is now completed.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A chair with a rotatable back cushion, comprising a seat plate (1) and a backrest (2) arranged at the rear of the seat plate (1), characterized in that: A square groove is provided in the center of the backrest (2); a first mounting block (3) and a second mounting block (4) are respectively provided vertically and slidably on both sides of the backrest (2); a same rotating shaft (5) is rotatably passed through the first mounting block (3) and the second mounting block (4); a cushion (29) is fixedly provided on the rotating shaft (5) and the cushion (29) is located in the square groove; a locking assembly is provided in the first mounting block (3) for locking the rotation of the rotating shaft (5); a plug-in groove (20) is provided in the second mounting block (4); the plug-in groove (20) is used for inserting the end of the rotating shaft (5) so as to install the rotating shaft (5).

2. A chair with a rotatable back cushion according to claim 1, characterized in that: A first horizontal sliding groove (6) is provided at one end of the rotating shaft (5), a locking block (7) is slidably provided in the first sliding groove (6), a first installation groove (8) is provided in the locking block (7), a first spring (9) is fixedly provided in the first installation groove (8), a first plug-in block (10) is fixedly provided at the other end of the first spring (9), a second through hole (13) is provided on the side wall of the rotating shaft (5), an annular first sliding groove (14) distributed around the circumferential direction of the inner wall thereof is provided inside the first installation block (3), the first sliding groove (6), the second through hole (13) and the first sliding groove (14) are connected, the first plug-in block (10) can slide in the first sliding groove (14), after the first plug-in block (10) is inserted into the first sliding groove (14) through the second through hole (13) as the locking block (7) slides in the first sliding groove (6), the rotating shaft (5) is driven to rotate while the locking block (7) is rotated.

3. A chair with a rotatable back cushion according to claim 2, characterized in that: The second through hole (13) is a square hole, the first plug-in block (10) has inclined surfaces on both sides in the moving direction of the locking block (7), and the other two sides are vertical surfaces, and the inclined surfaces on both sides are close to each other in the direction away from the first spring (9).

4. A chair with a rotatable back cushion according to claim 3, characterized in that: The side wall of the rotating shaft (5) is also provided with a first through hole (11), and the first through hole (11) is arranged on a side of the second through hole (13) away from the end of the rotating shaft (5). The locking assembly comprises a locking block (7) and a plurality of locking grooves (12), and the plurality of locking grooves (12) are all square grooves and are evenly spaced around the circumferential direction and are arranged in the first mounting block (3). The first sliding groove (6), the first through hole (11) and the locking groove (12) are connected, and the first plug-in block (10) is used to be inserted into the locking groove (12) through the first through hole (11) as the locking block (7) slides in the first sliding groove (6), so that the rotating shaft (5) is relatively stationary.

5. The chair with a rotatable back cushion according to claim 1, characterized in that: The other end of the rotating shaft (5) is provided with a horizontal second sliding groove (15), a disassembly block (16) is slidably arranged in the second sliding groove (15), the disassembly block (16) is provided with a second mounting groove (17), a second spring (18) is fixedly arranged in the second mounting groove (17), a second plug-in block (19) is fixedly arranged at the other end of the second spring (18), the second plug-in block (19) is provided with inclined surfaces on both sides of the second plug-in block (19) facing the moving direction of the disassembly block (16), and the other two sides are vertical surfaces, and the inclined surfaces on both sides are close to each other along the direction away from the second spring (18), the second mounting block (4) is provided with a second sliding groove (21) distributed around the circumferential direction, the second plug-in block (19) can slide in the second sliding groove (21), the second plug-in block (19) is used to slide out of the second sliding groove (15) and enter the plug-in groove (20) along with the disassembly block (16), so as to be plugged into the second sliding groove (21).

6. The chair with a rotatable back cushion according to claim 1, characterized in that: A first working groove (25) and a second working groove (26) are respectively provided on both sides of the backrest (2); a motor (22) is provided at the bottom of the backrest (2); an output end of the motor (22) is connected to a vertical transmission shaft (23); a first top support block (24) is threadedly connected to the transmission shaft (23); a top end of the first top support block (24) is fixedly connected to the bottom of the first mounting block (3); the first top support block (24) is vertically slidably arranged in the first working groove (25); a vertical sliding rod (27) is fixedly arranged in the second working groove (26); a second top support block (28) is slidably arranged on the sliding rod (27); a top end of the second top support block (28) is fixedly connected to the bottom of the second mounting block (4).

Images