A sofa depth adjustment mechanism

Abstract

This utility model discloses a sofa seat depth adjustment mechanism, including a base and a backrest. The backrest is fixed to the base, and a support frame is fixedly mounted on the base. A fixed plate is slidably mounted on the inner side of the support frame. Armrests are fixed on both sides of the base, and a seat cushion is fixedly mounted on the fixed plate. Multiple sets of adjustment holes are provided on the outer side of the support frame. Multiple sets of insertion holes are provided on the outer side of the fixed plate. Each set of insertion holes and adjustment holes contains a fixing mechanism. The fixing mechanism includes a rod and a fixing sleeve. The rod is inserted into the insertion hole and adjustment hole, and the fixing sleeve is inserted into the top of the rod. A control sleeve is rotatably mounted on the top of the fixing sleeve, and a locking block is fixed to the inner wall of the control sleeve. The beneficial effect of this device is primarily reflected in its ability to provide a quick and convenient adjustment method. The user only needs to push the fixed plate to the appropriate position and quickly adjust the seat cushion height by inserting the rod into the adjustment hole.

Description

Technical Field

[0001] This utility model relates to the field of sofa technology, and more specifically, to a sofa seat depth adjustment mechanism. Background Technology

[0002] In daily life, the comfort of home furnishing products such as sofas is of paramount importance. Regarding sofa seat depth adjustment, users typically want to be able to adjust the seat depth according to their own needs to achieve the best comfort experience.

[0003] However, in existing sofa designs, the seat depth adjustment mechanism is usually quite complex, and there is a lack of convenient fixing devices after adjustment. As a result, the adjusted seat depth cannot be stably fixed in a short time. This not only reduces the convenience of use, but also affects the overall comfort and practicality of the sofa. Users often need to spend a lot of time to ensure its stability when adjusting the seat depth, thus affecting the overall user experience. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, this utility model provides a sofa seat depth adjustment mechanism to solve the technical problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sofa seat depth adjustment mechanism, comprising a base and a backrest, the backrest being fixed to the base, a support frame being fixedly mounted on the base, a fixed plate being slidably mounted on the inner side of the support frame, armrests being fixedly mounted on both sides of the base, a seat cushion being fixedly mounted on the fixed plate, adjustment holes being provided on the outer side of the support frame, and multiple sets of adjustment holes being provided; insertion holes being provided on the outer side of the fixed plate, and multiple sets of insertion holes being provided; each of the multiple sets of insertion holes and adjustment holes is provided with a fixing mechanism, the fixing mechanism comprising a rod and a fixing sleeve, the rod being inserted into the insertion hole and adjustment hole, the fixing sleeve being inserted into the top end of the rod, a control sleeve being rotatably mounted on the top end of the fixing sleeve, a locking block being fixedly mounted on the inner wall of the control sleeve, multiple sets of locking blocks being provided and each having a locking hole on its outer side, and a locking plate being fixedly mounted on the outer wall of the rod, and multiple sets of locking plates being provided.

[0008] The present invention is further configured such that a movable groove is provided inside the insertion rod, and a push rod is slidably provided in the movable groove. A compression spring is connected between the bottom end of the push rod and the inner wall of the movable groove. The push rod and the compression spring structure can realize flexible adjustment and automatic reset of the insertion rod, thereby enhancing the convenience and smoothness of the adjustment process.

[0009] The present invention is further configured such that an adapter block is fixedly provided on the inner side of the fixed sleeve, and an adapter groove is provided on the outer wall of the insertion rod. Multiple sets of the adapter block and the adapter groove are provided. The accuracy and stability of the insertion positioning are improved by the cooperation of multiple sets of adapter structures.

[0010] The present invention is further configured such that a positioning block is slidably provided on the outer side of the control sleeve, and multiple sets of positioning blocks are provided, each with a reset spring connected to its top end. The bottom ends of the multiple sets of reset springs are fixedly connected to the outer wall of the control sleeve. The arrangement of multiple sets of positioning blocks and reset springs helps to quickly restore the position of the control sleeve, thereby improving the sensitivity and reliability of the adjustment structure.

[0011] The present invention is further configured such that a limiting sleeve is slidably provided on the outer wall of the fixed sleeve, a limiting rod is fixedly provided on the bottom surface of the limiting sleeve, a rotating sleeve is rotatably provided on the outer wall of the fixed sleeve, multiple sets of limiting rods abut against the top surface of the rotating sleeve, and an unlocking hole is provided on the top surface of the rotating sleeve. Multiple sets of unlocking holes are provided. The cooperation between the rotating sleeve and the limiting structure can realize stable locking and quick unlocking operations, improving the safety and flexibility of the use process.

[0012] The present invention is further configured such that each of the multiple sets of limiting rods is provided with a compression spring on its outer side, the top of each of the multiple sets of compression springs is fixedly connected to a limiting sleeve, and the bottom of each of the multiple sets of compression springs is set to be arc-shaped and abuts against the top surface of the rotating sleeve. The combination of the compression spring and the arc structure effectively buffers the impact force during the limiting process and enhances the stability of the device operation.

[0013] The present invention is further configured such that a positioning sleeve is fixedly provided on the bottom surface of the rotating sleeve, and a sliding hole is provided on the inner side of the positioning sleeve. Multiple sets of sliding holes are provided, and each set of sliding holes is connected to a push spring. Each set of push springs is connected to an abutment block at its top. The multiple sets of abutment blocks slide in the multiple sets of sliding holes respectively. An abutment groove is provided on the outer wall of the fixed sleeve. Multiple sets of abutment grooves are provided and abut against the multiple sets of abutment blocks respectively. Through the sliding cooperation between the abutment blocks and the abutment grooves, quick positioning and firm limiting can be achieved, ensuring the stability of the structure after adjustment.

[0014] The present invention is further configured such that the bottom ends of the multiple sets of abutment blocks and the outer sides of the abutment grooves are all arc-shaped. The arc-shaped structure reduces the frictional resistance during the sliding process and improves the smoothness and durability of the adjustment structure.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a sofa seat depth adjustment mechanism, which has the following beneficial effects:

[0017] 1. The primary benefit of this device lies in its ability to provide a quick and convenient adjustment method. Users simply slide the fixed plate to the desired position and quickly adjust the seat cushion height by inserting the rod and adjusting the hole. Rotating the control sleeve locks the seat cushion in place, ensuring precise depth adjustment. This process simplifies the cumbersome steps of traditional sofa adjustments, making adjustments more efficient and meeting the dual needs of different users for comfort and practicality.

[0018] 2. Through the tight fit between the fixing sleeve and the insertion rod, the locking block and the locking plate can be firmly fixed in the adjustment position, preventing loosening or instability during use. At the same time, the setting of the compression spring and the return spring not only ensures the stability of the position after adjustment, but also provides better rebound force during use, so that each adjustment can return to the most suitable state, improving the overall comfort of the user experience.

[0019] 3. By rotating the rotating sleeve and driving the positioning block through the unlocking hole, the user can easily unlock the seat position and quickly restore the original seat depth or make other adjustments. The entire unlocking process does not require any effort or complicated operation, and can be completed with just a simple rotation, which significantly improves the convenience and flexibility of the adjustment operation and meets the user's needs when quickly switching between different seat depths. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a sofa seat depth adjustment mechanism according to the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the fixing plate and the support frame in this utility model;

[0022] Figure 3 This is a cross-sectional view of the insertion hole and adjustment hole in this utility model;

[0023] Figure 4 This is a cross-sectional view of the fixing sleeve and the control sleeve in this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of this utility model.

[0025] In the diagram: 1. Base; 2. Backrest; 3. Support frame; 4. Fixing plate; 5. Armrest; 6. Seat cushion; 7. Adjustment hole; 8. Insertion hole; 9. Insertion rod; 10. Fixing sleeve; 11. Control sleeve; 12. Locking block; 13. Locking hole; 14. Locking plate; 15. Movable groove; 16. Push rod; 17. Compression spring; 18. Adaptor block; 19. Adaptor groove; 20. Positioning block; 21. Reset spring; 201. Positioning groove; 22. Limiting sleeve; 23. Limiting rod; 24. Rotating sleeve; 25. Unlocking hole; 26. Compression spring; 27. Positioning sleeve; 28. Sliding hole; 29. ​​Push spring; 30. Abutment block; 31. Abutment groove. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5 A sofa seat depth adjustment mechanism includes a base 1 and a backrest 2. The backrest 2 is fixed on the base 1. A support frame 3 is fixed on the base 1. A fixing plate 4 is slidably provided on the inner side of the support frame 3. Armrests 5 are fixed on both sides of the base 1. A seat cushion 6 is fixed on the fixing plate 4. An adjustment hole 7 is opened on the outer side of the support frame 3. Multiple sets of adjustment holes 7 are provided. An insertion hole 8 is opened on the outer side of the fixing plate 4. Multiple sets of insertion holes 8 are provided. A fixing mechanism is provided in each of the multiple sets of insertion holes 8 and adjustment holes 7. The fixing mechanism includes a rod 9 and a fixing sleeve 10. The rod 9 is inserted into the insertion hole 8 and adjustment hole 7. The fixing sleeve 10 is inserted into the top of the rod 9. A control sleeve 11 is rotatably provided at the top of the fixing sleeve 10. A locking block 12 is fixed on the inner wall of the control sleeve 11. Multiple sets of locking blocks 12 are provided, and locking holes 13 are opened on the outer side of each. A locking plate 14 is fixed on the outer wall of the rod 9. Multiple sets of locking plates 14 are provided.

[0030] The insertion rod 9 has a movable groove 15, and a push rod 16 is slidably disposed in the movable groove 15. A compression spring 17 is connected between the bottom end of the push rod 16 and the inner wall of the movable groove 15. Through the sliding cooperation between the movable groove and the push rod, the compression spring 17 provides a restoring force, so that the push rod 16 can automatically reset when needed, thereby ensuring the flexible adjustment and stable use of the insertion rod 9.

[0031] An adapter block 18 is fixedly provided on the inner side of the fixed sleeve 10, and an adapter groove 19 is provided on the outer wall of the insertion rod 9. Multiple sets of adapter blocks 18 and adapter grooves 19 are provided. The multiple sets of structures of adapter blocks 18 and adapter grooves 19 ensure the precise fit and stable connection between the insertion rod 9 and the fixed sleeve 10, thereby increasing the robustness and positioning accuracy of the entire device.

[0032] The control sleeve 11 is provided with a slidable positioning block 20 on the outside. The positioning block 20 is provided with multiple sets and each of them is connected to a return spring 21 at the top. The bottom of each set of return springs 21 is fixedly connected to the outer wall of the control sleeve 11. The cooperation between the positioning block 20 and the return spring 21 enables the control sleeve 11 to automatically return to its original position after operation, thereby ensuring that the control structure remains stable and reliable at all stages.

[0033] A limiting sleeve 22 is slidably provided on the outer wall of the fixed sleeve 10. A limiting rod 23 is fixedly provided on the bottom surface of the limiting sleeve 22. A rotating sleeve 24 is rotatably provided on the outer wall of the fixed sleeve 10. Multiple sets of limiting rods 23 abut against the top surface of the rotating sleeve 24. An unlocking hole 25 is provided on the top surface of the rotating sleeve 24. Multiple sets of unlocking holes 25 are provided. The cooperation between the limiting sleeve 22 and the rotating sleeve 24 and the limiting rod 23 achieves precise fixing and unlocking operations through rotation and limiting control. The unlocking hole 25 can provide a variety of unlocking methods to meet different needs.

[0034] Compression springs 26 are provided on the outer side of multiple sets of limiting rods 23. The top of each set of compression springs 26 is fixedly connected to a limiting sleeve 22. The bottom of each set of compression springs 26 is set in an arc shape and abuts against the top surface of the rotating sleeve 24. The design of the compression springs 26 and the arc-shaped structure can effectively reduce the friction between the rotating sleeve 24 and the limiting rods 23, ensuring a smoother rotation process and providing necessary elastic support when unlocking.

[0035] A positioning sleeve 27 is fixedly provided on the bottom surface of the rotating sleeve 24. A sliding hole 28 is provided on the inner side of the positioning sleeve 27. Multiple sets of sliding holes 28 are provided, and each set of sliding holes 28 is connected to a push spring 29. Each set of push springs 29 is connected to a stop block 30 at its top. The multiple sets of stop blocks 30 slide in the multiple sets of sliding holes 28. The outer wall of the fixed sleeve 10 is provided with a stop groove 31. Multiple sets of a stop groove 31 are provided and abut against the multiple sets of stop blocks 30. The design of the positioning sleeve 27 and the push spring 29 allows the stop blocks 30 to slide freely in the sliding holes 28, thereby achieving rapid positioning and precise fixation between the stop groove 31 and the stop blocks 30, ensuring a firm connection between the insertion rod and the fixed sleeve.

[0036] The bottom ends of the multiple sets of abutment blocks 30 and the outer sides of the abutment grooves 31 are all set in an arc shape. The arc design reduces the friction during sliding, reduces wear, and thus improves the service life and operating efficiency of the overall structure.

[0037] In this embodiment, the fixed plate 4 is pushed to slide inside the support frame 3, aligning the insertion hole 8 with the adjustment hole 7 of a suitable height. The insertion rod 9 is inserted into the insertion hole 8 and the adjustment hole 7. Then, the fixed sleeve 10 is inserted into the insertion rod 9, and multiple sets of adapter blocks 18 are inserted into the adapter groove 19. The rotating control sleeve 11 drives multiple sets of locking blocks 12 to rotate, so that multiple sets of locking plates 14 are inserted into the locking holes 13. The control sleeve 11 abuts against the push rod 16 to compress the compression spring 17. Multiple sets of compression springs 26 reset and push the limiting sleeve 22 to abut against the top of multiple sets of positioning blocks 20, so that the bottom of multiple sets of positioning blocks 20 abuts against the positioning groove 201 and compresses the reset spring 21. The rotating sleeve 24 is rotated so that the bottom of multiple sets of limiting rods 23 abuts against the top surface of the rotating sleeve 24. Multiple sets of push springs 29 push the abutting block 30 to abut against the abutting groove 31, thereby positioning and fixing the rotating sleeve 24, and completing the fixing of the height of the cushion 6.

[0038] More specifically, when it is necessary to unlock the fixed plate 4, rotating the rotating sleeve 24 causes multiple unlocking holes 25 to move to the bottom of the limiting rod 23, while driving the positioning sleeve 27 to rotate. Through multiple abutment grooves 31, the abutment block 30 slides along the sliding hole 28 to squeeze the push spring 29, pushing the limiting sleeve 22 to release the abutment of the multiple positioning blocks 20, so that the multiple limiting blocks are inserted into the unlocking hole 25 and squeeze the compression spring 26. Through multiple reset springs 21, the positioning block 20 is pulled so that its bottom end is disengaged from the positioning groove 201, releasing the positioning of the control sleeve 11. Rotating the control sleeve 11 drives multiple locking blocks 12 to rotate so that multiple locking plates 14 are disengaged from the locking hole 13, releasing the locking of the insertion rod 9. Through the reset of the compression spring 17, the push rod 16 is pushed. The push rod 16 pushes the control sleeve 11 so that the fixed sleeve 10 is disengaged from the insertion rod 9, releasing the support and fixation of the fixed plate 4.

[0039] In summary, during the use or operation of the overall equipment: push the fixed plate 4 to slide inside the support frame 3, align the insertion hole 8 with the adjustment hole 7 of a suitable height, insert the insertion rod 9 into the insertion hole 8 and the adjustment hole 7, then insert the fixed sleeve 10 into the insertion rod 9, insert multiple sets of adapter blocks 18 into the adapter slots 19, rotate the control sleeve 11 to drive multiple sets of locking blocks 12 to rotate, so that multiple sets of locking plates 14 are inserted into the locking holes 13, and the control sleeve 11 abuts against the push rod 16 to compress the spring. 17. Squeeze the material, and the multiple sets of compression springs 26 reset and push the limiting sleeve 22 to abut against the top of the multiple sets of positioning blocks 20, so that the bottom of the multiple sets of positioning blocks 20 abuts against the positioning groove 201 and squeezes the reset spring 21. Rotate the rotating sleeve 24 so that the bottom of the multiple sets of limiting rods 23 abuts against the top surface of the rotating sleeve 24. The multiple sets of push springs 29 push the abutting block 30 to abut against the abutting groove 31, thereby positioning and fixing the rotating sleeve 24, and completing the fixing of the height of the seat cushion 6.

[0040] When it is necessary to unlock the fixed plate 4, rotating the rotating sleeve 24 causes multiple unlocking holes 25 to move to the bottom of the limiting rod 23, and at the same time drives the positioning sleeve 27 to rotate. Through multiple abutment grooves 31, the abutment block 30 slides along the sliding hole 28 to squeeze the push spring 29, and pushes the limiting sleeve 22 to release the abutment of the multiple positioning blocks 20, so that the multiple limiting blocks are inserted into the unlocking hole 25 and squeeze the compression spring 26. Through multiple reset springs 21, the positioning block 20 is pulled so that its bottom end is disengaged from the positioning groove 201, and the positioning of the control sleeve 11 is released. Rotating the control sleeve 11 drives multiple locking blocks 12 to rotate so that multiple locking plates 14 are disengaged from the locking hole 13, and the locking of the insertion rod 9 is released. Through the reset of the compression spring 17, the push rod 16 is pushed. The push rod 16 pushes the control sleeve 11 so that the fixed sleeve 10 is disengaged from the insertion rod 9, and the support and fixation of the fixed plate 4 are released.

[0041] Of all the solutions mentioned above, those involving connections between two components can be selected based on the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other well-known connection methods. These will not be elaborated on here. For all the fixed connections mentioned above, welding is the preferred option.

[0042] In all the solutions mentioned above, the operation of electrical components, unless otherwise specified, is controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and wiring connections are existing, well-known, and mature technologies, and their specific circuit structures will not be described in detail here. The specific models and specifications of the electrical components involved in this solution need to be selected and determined according to the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, and therefore will not be described in detail.

[0043] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies and will not be described in detail in this utility model.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sofa depth adjustment mechanism comprising a base (1) and a backrest (2), characterized in that: The backrest (2) is fixed on the base (1), and a support frame (3) is fixed on the base (1). A fixing plate (4) is slidably provided on the inner side of the support frame (3). Armrests (5) are fixed on both sides of the base (1). A seat cushion (6) is fixed on the fixing plate (4). An adjustment hole (7) is provided on the outer side of the support frame (3). Multiple sets of adjustment holes (7) are provided. An insertion hole (8) is provided on the outer side of the fixing plate (4). Multiple sets of insertion holes (8) are provided. Each set of insertion holes (8) and adjustment hole (7) is provided with a... A fixing mechanism is provided, which includes a plug rod (9) and a fixing sleeve (10). The plug rod (9) is inserted into the plug hole (8) and the adjustment hole (7). The fixing sleeve (10) is inserted into the top of the plug rod (9). The top of the fixing sleeve (10) is rotatably provided with a control sleeve (11). The inner wall of the control sleeve (11) is fixedly provided with a locking block (12). The locking block (12) is provided in multiple sets and each of them has a locking hole (13) on its outer side. The outer wall of the plug rod (9) is fixedly provided with a locking plate (14). The locking plate (14) is provided in multiple sets.

2. A sofa depth adjustment mechanism according to claim 1, characterised in that: The insert (9) has a movable groove (15) inside, and a push rod (16) is slidably provided in the movable groove (15). A compression spring (17) is connected between the bottom end of the push rod (16) and the inner wall of the movable groove (15).

3. A sofa depth adjustment mechanism according to claim 2, characterised in that: An adapter block (18) is fixedly provided on the inner side of the fixed sleeve (10), and an adapter groove (19) is provided on the outer wall of the insertion rod (9). Multiple sets of the adapter block (18) and the adapter groove (19) are provided.

4. A sofa depth adjustment mechanism according to claim 3, characterised in that: The control sleeve (11) is slidably provided with a positioning block (20). The positioning block (20) is provided with multiple sets and each of the top ends is connected with a reset spring (21). The bottom ends of the multiple sets of reset springs (21) are fixedly connected to the outer wall of the control sleeve (11). The outer wall of the fixed sleeve (10) is provided with several sets of positioning grooves (201).

5. A sofa seat depth adjustment mechanism according to claim 4, characterized in that: A limiting sleeve (22) is slidably provided on the outer wall of the fixed sleeve (10), a limiting rod (23) is fixedly provided on the bottom surface of the limiting sleeve (22), and a rotating sleeve (24) is rotatably provided on the outer wall of the fixed sleeve (10). Multiple sets of limiting rods (23) abut against the top surface of the rotating sleeve (24), and an unlocking hole (25) is provided on the top surface of the rotating sleeve (24). Multiple sets of unlocking holes (25) are provided.

6. A sofa depth adjustment mechanism according to claim 5, characterised in that: Compression springs (26) are provided on the outer side of multiple sets of limiting rods (23). The top of each set of compression springs (26) is fixedly connected to a limiting sleeve (22). The bottom of each set of compression springs (26) is set in an arc shape and abuts against the top surface of the rotating sleeve (24).

7. A sofa depth adjustment mechanism according to claim 6, characterised in that: A positioning sleeve (27) is fixedly provided on the bottom surface of the rotating sleeve (24). A sliding hole (28) is provided on the inner side of the positioning sleeve (27). Multiple sets of sliding holes (28) are provided, and push springs (29) are connected to the inner side of each set. Abutting blocks (30) are connected to the top of each set of push springs (29). Multiple abutting blocks (30) slide in multiple sets of sliding holes (28). An abutting groove (31) is provided on the outer wall of the fixed sleeve (10). Multiple sets of abutting grooves (31) are provided and abut against multiple sets of abutting blocks (30) respectively.

8. A sofa depth adjustment mechanism according to claim 7, characterised in that: The bottom of the multiple sets of abutment blocks (30) and the outer side of the abutment groove (31) are both set to be arc-shaped.

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