Seat tray

Abstract

The utility model provides a seat tray which comprises a base, an adjusting rod arranged in the base and a pressing piece arranged on the adjusting rod in a sleeved mode and moving in the axial direction of the adjusting rod, and the two ends of an elastic piece are connected to the pressing piece and a fixing base respectively so that the stroke of the elastic piece can be compressed when the pressing piece moves towards the fixing base along the adjusting rod. A warping plate is rotationally connected to the base, and one end of the warping plate abuts against the fixing base, so that when the warping plate rotates relative to the base, the warping plate abuts against the elastic piece; the adjusting rod comprises a fixed rod and an adjustable rod which are detachably connected, the end part of the adjustable rod is movably inserted into the fixed seat, and when the adjustable rod is separated from the fixed rod and contracts into the fixed seat, a gap is formed between the fixed rod and the fixed seat; according to the utility model, the use and bearing strength of parts such as a seat back plate can be conveniently adjusted, and meanwhile, the main spring can be conveniently replaced.

Description

Technical Field

[0001] This utility model relates to the field of seating, and more particularly to a seat tray. Background Technology

[0002] Chairs on the market come in a variety of structures, among which adjustable backrests are increasingly favored by consumers for their comfortable posture.

[0003] Current chair backrest adjustment mechanisms typically tilt the backrest backward at a certain angle when a user leans against it. However, people with different weights and different needs for support cannot adjust the backrest to their specific needs. This means that when a heavier user leans against the backrest, it cannot provide sufficient support, while a lighter user finds it difficult to tilt the backrest backward. Furthermore, users with different needs for backrest support cannot adjust it to their preferred level.

[0004] In addition, since the main stress-bearing structure of the backrest is in the spring, the spring is prone to aging and weakening of elasticity when relying on the backrest for a long time. The existing spring structure in the tray requires the simultaneous disassembly of many parts when disassembling and replacing the spring, making the spring replacement process extremely complicated. Utility Model Content

[0005] The purpose of this utility model is to provide a seat tray that allows for convenient adjustment of the use and load-bearing capacity of components such as the seat back panel, and also allows for convenient replacement of the main spring.

[0006] To solve the above-mentioned technical problems, this utility model provides a seat tray, including a base, an adjusting rod disposed in the base, and a pressure plate sleeved on the adjusting rod and moving axially along the adjusting rod. An elastic element has its two ends connected to the pressure plate and a fixed seat, respectively, so that when the pressure plate moves along the adjusting rod towards the fixed seat, it compresses the travel of the elastic element. A rocker is rotatably connected to the base, with one end of the rocker abutting against the fixed seat, so that when the rocker rotates relative to the base, it presses against the elastic element. The adjusting rod includes a fixed rod and an adjustable rod that are detachably connected. The end of the adjustable rod is movably inserted into the fixed seat. When the adjustable rod detaches from the fixed rod and retracts into the fixed seat, there is a gap between the fixed rod and the fixed seat.

[0007] Furthermore, a guide rail is provided on the inner side of the base along the axial direction of the adjusting rod, and limiting plates are provided on both sides of the pressing plate, with two adjacent limiting plates located on both sides of the guide rail.

[0008] Furthermore, the base is provided with a fixing groove, the end of the fixing rod is rotatably connected to the fixing groove, and the pressure plate and the fixing rod are threaded together.

[0009] Furthermore, a worm gear is rotatably provided on the inner side of the base, and a helical gear matching the worm gear is provided on the outer periphery of the fixed rod, so that the fixed rod rotates synchronously when the worm gear rotates.

[0010] Furthermore, an adjustment handle is rotatably provided on the side of the base, and the adjustment handle is in a transmission engagement with the worm gear.

[0011] Furthermore, the rocker end has a positioning rod, and the side of the fixed seat has a positioning groove that matches the positioning rod, so that the positioning rod is engaged in the positioning groove.

[0012] Furthermore, the fixed seat has a groove on the side near the positioning rod, and an adjustment groove is provided on the inner side of the fixed seat to be movably matched with the adjustable rod. A positioning block matching the groove is provided at the middle position of the positioning rod, and the positioning block has a through hole communicating with the adjustment groove.

[0013] Furthermore, the adjustable rod has a screw hole at one end near the positioning block, a plug is fastened to the through hole, and a disassembly port matching the groove is provided at the base.

[0014] Furthermore, a limiting component is connected to the outer periphery of the fixing rod, and the pressure plate matches the limiting component.

[0015] Furthermore, the adjustment handle has a pressing lever on its side.

[0016] The beneficial effects of this utility model are as follows: By controlling the movement of the pressure plate along the adjusting rod, the pressure plate and the fixed seat are brought closer or further apart, thereby compressing or releasing the elastic element between them, and thus changing the stroke of the elastic element. During this process, because the stroke of the elastic element is changed, the elastic force of the elastic element changes synchronously. That is, when the stroke of the elastic element is compressed and reduced, the supporting force of the elastic element on the fixed seat increases, and conversely, when the stroke of the elastic element is increased, the supporting force of the elastic element on the fixed seat decreases. This allows the rocker to connect to the backrest of the seat. When the user leans against the backrest, the rocker can rotate relative to the base, causing the end of the rocker to press against the fixed seat and the elastic element. Thus, the adjusted elastic element applies different leaning forces to the backrest, improving the adaptability to the leaning force needs of different users.

[0017] Meanwhile, since the adjusting rod is formed by connecting the fixed rod and the adjustable rod, when it is necessary to disassemble and replace the elastic element, it is only necessary to detach the adjustable rod from the fixed rod, so that a gap appears between the fixed rod and the fixed seat. At this time, the elastic element can be disassembled and replaced through this gap. After the new elastic element is installed, the adjustable rod can be reconnected to the fixed rod to ensure the overall use of the adjusting rod. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0020] Figure 3 This is a planar sectional view of the present invention.

[0021] Figure 4 This is a schematic diagram of the cooperation between the guide rail and the limiting plate in this utility model.

[0022] Reference numerals: 1. Base; 2. Adjusting rod; 21. Fixed rod; 22. Adjustable rod; 23. Twisting hole; 3. Pressure plate; 4. Fixed seat; 41. Groove; 42. Positioning block; 43. Adjusting groove; 44. Through hole; 45. Plug; 46. Disassembly port; 5. Elastic element; 6. Rocker; 7. Guide rail; 8. Limiting plate; 9. Fixed groove; 10. Worm gear; 11. Helical gear; 12. Adjusting handle; 13. Positioning rod; 14. Positioning groove; 15. Limiting element; 16. Pressing lever; 17. Main shaft. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0024] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0025] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0026] like Figures 1-4The present invention provides a seat tray, including a base 1, an adjusting rod 2 disposed in the base 1, a pressure plate 3 sleeved on the adjusting rod 2 and moving axially along the adjusting rod 2, and an elastic member 5 having both ends connected to the pressure plate 3 and a fixed seat 4, so that when the pressure plate 3 moves along the adjusting rod 2 toward the fixed seat 4, it compresses the stroke of the elastic member 5; a rocker 6 is rotatably connected to the base 1, one end of the rocker 6 abutting against the fixed seat 4, so that when the rocker 6 rotates relative to the base 1, the rocker 6 presses against the elastic member 5; the adjusting rod 2 includes a fixed rod 21 and an adjustable rod 22 detachably connected, the end of the adjustable rod 22 being movably inserted into the fixed seat 4, and when the adjustable rod 22 is disengaged from the fixed rod 21 and retracted into the fixed seat 4, there is a gap between the fixed rod 21 and the fixed seat 4.

[0027] By controlling the movement of the pressure plate along the adjusting rod, the pressure plate and the fixed seat are moved closer or further apart, compressing or releasing the elastic element between them, thereby changing the stroke of the elastic element. During this process, the elastic force of the elastic element changes synchronously due to the change in the stroke of the elastic element. That is, when the stroke of the elastic element is reduced, the supporting force of the elastic element on the fixed seat increases, and conversely, when the stroke of the elastic element is increased, the supporting force of the elastic element on the fixed seat decreases. This allows the rocker arm to connect to the backrest of the seat. When the user leans against the backrest, the rocker arm can rotate relative to the base, causing the end of the rocker arm to press against the fixed seat and the elastic element. Thus, the adjusted elastic element applies different levels of support to the backrest, improving the adaptability to the different support needs of users.

[0028] Meanwhile, since the adjusting rod is formed by connecting the fixed rod and the adjustable rod, when it is necessary to disassemble and replace the elastic element, it is only necessary to detach the adjustable rod from the fixed rod, so that a gap appears between the fixed rod and the fixed seat. At this time, the elastic element can be disassembled and replaced through this gap. After the new elastic element is installed, the adjustable rod can be reconnected to the fixed rod to ensure the overall use of the adjusting rod.

[0029] The elastic element adopts a spring structure; multiple mounting holes are provided on the rocker plate for connecting to the seat back.

[0030] In one embodiment of this solution, the fixed rod and the adjustable rod are fixed by a threaded connection.

[0031] Preferably, a guide rail 7 is provided on the inner side of the base 1 along the axial direction of the adjusting rod 2, and the pressure plate 3 has limiting plates 8 on both sides, with two adjacent limiting plates 8 located on both sides of the guide rail 7.

[0032] Specifically, when the tablet moves along the axial direction of the adjusting rod, the mutual guidance between the limiting plate and the guide rail ensures that the tablet can only move along the direction of the guide rail, that is, along the axial direction of the adjusting rod, so as to ensure the stable compression or reset of the elastic element of the tablet.

[0033] Preferably, the base 1 is provided with a fixing groove 9, the end of the fixing rod 21 is rotatably connected in the fixing groove 9, and the pressure plate 3 is threadedly engaged with the fixing rod 21.

[0034] Specifically, the two ends of the adjusting rod are positioned by the fixing groove and the fixing seat to ensure the stability of the adjusting rod itself. At the same time, due to the threaded engagement between the fixing rod and the pressure plate, when the fixing rod rotates, the pressure plate will move relative to the guide rail through the threaded structure, so as to achieve the effect of adjusting the position of the pressure plate by the fixing rod and controlling the stroke of the elastic element.

[0035] Preferably, a worm gear 10 is rotatably provided on the inner side of the base 1, and a helical gear 11 matching the worm gear 10 is provided on the outer periphery of the fixed rod 21, so that the fixed rod 21 rotates synchronously when the worm gear 10 rotates.

[0036] Specifically, when it is necessary to rotate the fixed rod, the worm gear is rotated, which in turn drives the helical gear to rotate, so that the helical gear can stably drive the fixed rod to rotate, ensuring the accurate adjustment of the elastic element's stroke.

[0037] Preferably, the base 1 is rotatably provided with an adjustment handle 12, and the adjustment handle 12 is in a transmission engagement with the worm gear 10.

[0038] Specifically, users can rotate the adjustment handle to move it to the worm gear position, thereby conveniently controlling the rotation of the worm gear and enabling the adjustment handle to stably control the elastic element for stroke control.

[0039] In one embodiment of this solution, the transmission method between the adjustment handle and the worm gear can be a gear transmission method.

[0040] Preferably, the rocker 6 has a positioning rod 13 at its end, and the fixed seat 4 has a positioning groove 14 on its side that matches the positioning rod 13, so that the positioning rod 13 is engaged in the positioning groove 14.

[0041] Specifically, the rocker end is engaged with a positioning rod in a positioning groove, so that when the backrest pushes the rocker to rotate, the end of the rocker can maintain the connection with the fixed seat through the positioning rod, thereby ensuring the stable support of the rocker by the elastic element.

[0042] In one embodiment of this solution, a main shaft 17 is connected between the rocker 6 and the base 1. The main shaft 17 ensures the rotation of the rocker 6 and the pressure of the end of the rocker 6 on the fixed base 4.

[0043] Preferably, the fixed base 4 has a groove 41 on the side near the positioning rod 13, and the inner side of the fixed base 4 is provided with an adjustment groove 43 that is movably engaged with the adjustable rod 22. The positioning rod 13 is provided with a positioning block 42 that matches the groove 41 at the middle position, and the positioning block 42 is provided with a through hole 44 that connects to the adjustment groove 43.

[0044] Specifically, while the positioning rod is engaged in the positioning groove, the positioning block is simultaneously engaged in the groove to ensure the accuracy of the through hole position. This allows a disassembly tool to be inserted through the through hole to the adjustable rod when it is necessary to remove the adjustable rod from the fixed rod, thereby conveniently controlling the adjustable rod to detach from the fixed rod. This ensures that the elastic element can be easily replaced without disassembling additional parts.

[0045] The positioning rod adopts a two-section structure, with a positioning block connecting the two sections, so that the through hole is also located between the two sections, ensuring the smooth entry of the disassembly tool.

[0046] It is worth mentioning that after the adjustable rod is disengaged from the fixed rod, the adjustable rod can be temporarily retracted into the adjustment groove to ensure that the gap between the fixed rod and the fixed seat is large enough, thereby providing space for the replacement of the elastic element.

[0047] Preferably, the adjustable rod 22 has a screw hole 23 at one end near the positioning block 42, a plug 45 is fastened at the through hole 44, and a disassembly port 46 matching the groove 41 is provided at the base 1.

[0048] Specifically, after the disassembly tool is inserted into the adjustable rod, the adjustable rod can be rotated by inserting it into the screw hole, thereby unscrewing the adjustable rod from the fixed rod. After the through hole is used, the plug can be installed in the through hole to protect the adjustment groove and other parts, improve the service life of the parts, and prevent a large amount of dust from entering.

[0049] The disassembly port is designed to provide sufficient space for disassembly tools to enter the through hole, ensuring a smooth disassembly and installation process.

[0050] In one embodiment of this solution, the screw hole can be an internal hexagonal structure, the disassembly tool can be a matching internal hexagonal wrench, and the plug can be a rubber soft plug.

[0051] Preferably, the fixing rod 21 is connected to the limiting member 15 on its outer periphery, and the pressure plate 3 is matched with the limiting member 15.

[0052] Specifically, during the process of the pressure plate moving and adjusting along the fixed rod, the movement stroke of the pressure plate is limited by the limiting component, so that the adjustment range of the pressure plate on the elastic element is controlled by the limiting component, so as to avoid the pressure plate over-compressing the elastic element and making the backrest difficult to use.

[0053] In one embodiment of this solution, the limiting member is threadedly connected to the outer periphery of the fixing rod.

[0054] Preferably, the adjustment handle 12 has a pressing lever 16 on its side.

[0055] Specifically, users can easily control the rotation angle of the adjustment handle by flipping the press lever, thereby stably and accurately controlling the travel of the elastic element and the tightness of the backrest.

[0056] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A seat pan characterized by: The system includes a base (1), an adjusting rod (2) disposed in the base (1), a pressure plate (3) sleeved on the adjusting rod (2) and moving axially along the adjusting rod (2), and an elastic element (5) with both ends connected to the pressure plate (3) and the fixed seat (4) respectively, so that when the pressure plate (3) moves along the adjusting rod (2) towards the fixed seat (4), it compresses the stroke of the elastic element (5); a rocker (6) is rotatably connected to the base (1), and one end of the rocker (6) abuts against The fixed seat (4) is used so that when the rocker (6) rotates relative to the base (1), the rocker (6) presses against the elastic element (5); the adjusting rod (2) includes a fixed rod (21) and an adjustable rod (22) that are detachably connected. The end of the adjustable rod (22) is movably inserted into the fixed seat (4). When the adjustable rod (22) is disengaged from the fixed rod (21) and retracted into the fixed seat (4), there is a gap between the fixed rod (21) and the fixed seat (4).

2. The seat pan of claim 1, wherein: The base (1) has a guide rail (7) arranged along the axial direction of the adjusting rod (2) on the inner side. The pressure plate (3) has limiting plates (8) on both sides, and the two adjacent limiting plates (8) are located on both sides of the guide rail (7).

3. The seat pan of claim 1, wherein: The base (1) is provided with a fixing groove (9), the end of the fixing rod (21) is rotatably connected in the fixing groove (9), and the pressure plate (3) and the fixing rod (21) are threaded together.

4. The seat pan of claim 1, wherein: The base (1) is rotatably provided with a worm gear (10) on its inner side, and the fixed rod (21) is provided with a helical gear (11) that matches the worm gear (10) on its outer periphery, so that when the worm gear (10) rotates, the fixed rod (21) rotates synchronously.

5. The seat pan of claim 4, wherein: The base (1) is rotatably provided with an adjustment handle (12), and the adjustment handle (12) and the worm gear (10) are in a transmission engagement.

6. The seat pan of claim 1, wherein: The rocker (6) has a positioning rod (13) at its end, and the fixed seat (4) has a positioning groove (14) on its side that matches the positioning rod (13), so that the positioning rod (13) can be engaged in the positioning groove (14).

7. The seat pan of claim 6, wherein: The fixed base (4) has a groove (41) on the side near the positioning rod (13). The fixed base (4) has an adjustment groove (43) that is movably matched with the adjustable rod (22) on the inner side. The positioning rod (13) has a positioning block (42) that matches the groove (41) at the middle position. The positioning block (42) has a through hole (44) that connects to the adjustment groove (43).

8. The seat pan of claim 7, wherein: The adjustable rod (22) has a screw hole (23) at one end near the positioning block (42), a plug (45) is fastened at the through hole (44), and a disassembly port (46) matching the groove (41) is provided at the base (1).

9. The seat pan of claim 1, wherein: The fixing rod (21) is connected to a limiting member (15) on its outer periphery, and the pressure plate (3) matches the limiting member (15).

10. The seat tray according to claim 5, characterized in that: The adjustment handle (12) has a pressing lever (16) on its side.

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