Adjustable seat tray

Abstract

This utility model provides an adjustable seat tray, including a base, an adjusting rod disposed in the base, and a pressure plate sleeved on the adjusting rod and movable along the adjusting rod's axial direction. One end of the adjusting rod is movably inserted into a fixed seat, and both ends of an elastic element are respectively connected to the pressure plate and the fixed seat, 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, and one end of the rocker abuts against the fixed seat, so that when the rocker rotates relative to the base, it presses against the elastic element. A limiting member is connected to the outer periphery of the adjusting rod, and the pressure plate matches the limiting member. A moving groove is opened on the inner side of the fixed seat, and a rotating sleeve is movably disposed in the moving groove, with the end of the rotating sleeve matching the limiting member, so that when the end of the rotating sleeve is inserted into one side of the limiting member, the rotating sleeve can drive the limiting member to rotate. This utility model can conveniently adjust the use and load-bearing capacity of components such as the seat back panel.

Description

Technical Field

[0001] This utility model relates to the field of seating, and more particularly to an adjustable 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. Utility Model Content

[0004] The purpose of this utility model is to provide an adjustable seat tray that allows for convenient adjustment of the use and load-bearing capacity of components such as the seat back panel.

[0005] To solve the above-mentioned technical problems, this utility model provides an adjustable seat tray, including a base, an adjusting rod disposed in the base, and a pressure plate sleeved on the adjusting rod and movable along the adjusting rod axially. One end of the adjusting rod is movably inserted into a fixed seat, and both ends of an elastic element are respectively connected to the pressure plate and the fixed seat, so that when the pressure plate moves along the adjusting rod towards the fixed seat, it compresses the stroke of the elastic element. A rocker is rotatably connected to the base, and one end of the rocker abuts against the fixed seat, so that when the rocker rotates relative to the base, the rocker presses against the elastic element. A limiting member is connected to the outer periphery of the adjusting rod, and the pressure plate matches the limiting member. A moving groove is opened on the inner side of the fixed seat, and the moving groove is inclined downward relative to the base. A rotating sleeve is movably disposed in the moving groove, and the end of the rotating sleeve matches the limiting member, so that when the end of the rotating sleeve is inserted into one side of the limiting member, the rotating sleeve can drive the limiting member to rotate.

[0006] Furthermore, the limiting member has a groove along its circumferential direction on its side, and the groove matches the end of the rotating sleeve.

[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 adjusting rod is rotatably connected to the fixing groove, and the pressure plate and the adjusting rod are threaded together.

[0009] Furthermore, a worm gear is rotatably mounted on the inner side of the base, and a helical gear matching the worm gear is mounted on the outer periphery of the adjusting rod, so that the adjusting 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 base has a groove on the side near the positioning rod, and 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 moving groove.

[0013] Furthermore, the rotating sleeve has a screw hole at its end, which matches the through hole, and the base has a disassembly port that matches the through hole.

[0014] Furthermore, the adjustment handle has a pressing lever on its side.

[0015] 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.

[0016] Meanwhile, by rotating the sleeve and setting the limiting component, the movement stroke of the pressing plate is limited by the limiting component during the adjustment process along the adjusting rod. This allows the limit component to control the range of travel adjustment of the pressing plate to the elastic element, thus avoiding the pressing plate from over-compressing the elastic element and making the backrest unusable.

[0017] Because different users have different requirements for the backrest support strength, the limiting range of the limiting component for the pressing plate also varies. Furthermore, since the elastic component is prone to aging and weakening of elasticity after prolonged use, this solution makes the limiting component adjustable. This allows users to adjust the limiting position of the limiting component for the pressing plate to adapt to the specific needs of different users or to compensate for the weakening of the elasticity of the elastic component. When adjusting the position of the limiting component, the rotating sleeve is moved relative to the moving groove, so that the end of the rotating sleeve is inserted into the side of the limiting component for locking. Then, the rotating sleeve drives the limiting component to rotate, so that the limiting component can be adjusted and moved along the axis of the adjusting rod. Since the moving groove is inclined, the rotating sleeve can retract into the moving groove by its own weight when not in use, avoiding interference with the movement of the adjusting rod. Attached Figure Description

[0018] Figure 1 This 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; 3. Pressure plate; 4. Fixed seat; 41. Moving groove; 42. Moving sleeve; 43. Slot; 44. Groove; 45. Positioning block; 46. Through hole; 47. Tightening hole; 48. 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 1-4 The present invention provides an adjustable seat tray, including a base 1, an adjusting rod 2 disposed in the base 1, and a pressure plate 3 sleeved on the adjusting rod 2 and movable along the axial direction of the adjusting rod 2. One end of the adjusting rod 2 is movably inserted into a fixed seat 4, and both ends of an elastic element 5 are respectively connected to the pressure plate 3 and the fixed seat 4, 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, so that the rocker 6... When the base 1 rotates, the rocker plate 6 presses against the elastic element 5; the adjusting rod 2 is connected to the limiting element 15 on its outer periphery, and the pressure plate 3 matches the limiting element 15; the fixed base 4 has a moving groove 41 on its inner side, the moving groove 41 is inclined downward relative to the base 1, and a rotating sleeve 42 is movably arranged in the moving groove 41, and the end of the rotating sleeve 42 matches the limiting element 15, so that when the end of the rotating sleeve 42 is inserted into one side of the limiting element 15, the rotating sleeve 42 can drive the limiting element 15 to rotate.

[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, by rotating the sleeve and setting the limiting component, the movement stroke of the pressing plate is limited by the limiting component during the adjustment process along the adjusting rod. This allows the limit component to control the range of travel adjustment of the pressing plate to the elastic element, thus avoiding the pressing plate from over-compressing the elastic element and making the backrest unusable.

[0029] Because different users have different requirements for the backrest support strength, the limiting range of the limiting component for the pressing plate also varies. Furthermore, since the elastic component is prone to aging and weakening of elasticity after prolonged use, this solution makes the limiting component adjustable. This allows users to adjust the limiting position of the limiting component for the pressing plate to adapt to the specific needs of different users or to compensate for the weakening of the elasticity of the elastic component. When adjusting the position of the limiting component, the rotating sleeve is moved relative to the moving groove, so that the end of the rotating sleeve is inserted into the side of the limiting component for locking. Then, the rotating sleeve drives the limiting component to rotate, so that the limiting component can be adjusted and moved along the axis of the adjusting rod. Since the moving groove is inclined, the rotating sleeve can retract into the moving groove by its own weight when not in use, avoiding interference with the movement of the adjusting rod.

[0030] In one embodiment of this solution, the limiting member is threadedly connected to the outer periphery of the adjusting rod.

[0031] Preferably, the limiting member 15 has a groove 43 circumferentially formed on its side, and the groove 43 matches the end of the rotating sleeve 42.

[0032] Specifically, when the rotating sleeve is snapped onto the side of the limiting component, the end of the rotating sleeve is inserted into the slot. The slot keeps the rotating sleeve and the limiting component in a stable match, thereby ensuring that the rotating sleeve can drive the limiting component to rotate.

[0033] In one embodiment of this solution, the slot can adopt a polygonal structure such as a quadrilateral or a hexagon, and the end of the rotating sleeve matches the shape of the slot to ensure that the rotating sleeve can drive the limiting component to rotate during the rotation process.

[0034] 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.

[0035] 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.

[0036] Preferably, the base 1 is provided with a fixing groove 9, the end of the adjusting rod 2 is rotatably connected to the fixing groove 9, and the pressure plate 3 is threadedly engaged with the adjusting rod 2.

[0037] 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 adjusting rod and the pressure plate, when the adjusting 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 adjusting rod to control the stroke of the elastic element.

[0038] 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 adjusting rod 2, so that the adjusting rod 2 rotates synchronously when the worm gear 10 rotates.

[0039] Specifically, when it is necessary to rotate the adjusting rod, the worm gear is rotated, which in turn drives the helical gear to rotate, so that the helical gear stably drives the adjusting rod to rotate, ensuring the accurate adjustment of the elastic element's stroke.

[0040] 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.

[0041] 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.

[0042] In one embodiment of this solution, the transmission method between the adjustment handle and the worm gear can be a gear transmission method.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] Preferably, the fixed base 4 has a groove 44 on the side near the positioning rod 13, and a positioning block 45 matching the groove 44 is provided at the middle position of the positioning rod 13, and the positioning block 45 has a through hole 46 communicating with the moving groove 41.

[0047] 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 the disassembly tool to be inserted through the through hole to the rotating sleeve when it is necessary to push the rotating sleeve to the side of the limiting part, thereby facilitating the pushing and moving of the rotating sleeve.

[0048] 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.

[0049] Preferably, the rotating sleeve 42 has a screw hole 47 at its end, which matches the through hole 46, and the base 1 has a disassembly port 48 that matches the through hole 46.

[0050] Specifically, after the disassembly tool moves and pushes the rotating sleeve, the end of the disassembly tool is inserted into the screw hole, so that the disassembly tool controls the rotation of the rotating sleeve through the screw hole, and then the fixed limit component rotates.

[0051] The disassembly port is designed to provide sufficient space for disassembly tools to enter the through hole, ensuring a smooth disassembly and installation process.

[0052] In one embodiment of this solution, the screw hole can be an internal hexagonal structure, and the disassembly tool can be a matching internal hexagonal wrench.

[0053] Preferably, the adjustment handle 12 has a pressing lever 16 on its side.

[0054] 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.

[0055] 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. An adjustable seat tray, characterized in that: The system includes a base (1), an adjusting rod (2) disposed in the base (1), and a pressure plate (3) sleeved on the adjusting rod (2) and moving axially along the adjusting rod (2). One end of the adjusting rod (2) is movably inserted into a fixed seat (4), and both ends of an elastic element (5) are 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 travel 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), so that the rocker (6) moves relative to the base (1). When rotating, the rocker (6) presses against the elastic element (5); the outer periphery of the adjusting rod (2) is connected to the limiting element (15), and the pressure plate (3) matches the limiting element (15). The inner side of the fixed seat (4) is provided with a moving groove (41). The moving groove (41) is inclined downward relative to the base (1). A rotating sleeve (42) is movably arranged in the moving groove (41), and the end of the rotating sleeve (42) matches the limiting element (15) so that when the end of the rotating sleeve (42) is inserted into one side of the limiting element (15), the rotating sleeve (42) can drive the limiting element (15) to rotate.

2. The adjustable seat tray according to claim 1, characterized in that: The limiting member (15) has a groove (43) on its side along the circumferential direction, and the groove (43) matches the end of the rotating sleeve (42).

3. The adjustable seat tray according to claim 1, characterized in that: 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).

4. The adjustable seat tray according to claim 1, characterized in that: The base (1) is provided with a fixing groove (9), the end of the adjusting rod (2) is rotatably connected in the fixing groove (9), and the pressure plate (3) and the adjusting rod (2) are threaded together.

5. The adjustable seat tray according to claim 1, characterized in that: The base (1) is rotatably provided with a worm gear (10) on its inner side, and the adjusting rod (2) is provided with a helical gear (11) that matches the worm gear (10) on its outer periphery, so that the adjusting rod (2) rotates synchronously when the worm gear (10) rotates.

6. The adjustable seat tray according to claim 5, characterized in that: 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.

7. The adjustable seat tray according to claim 1, characterized in that: 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).

8. The adjustable seat tray according to claim 7, characterized in that: The fixed base (4) has a groove (44) on the side near the positioning rod (13), and a positioning block (45) matching the groove (44) is provided in the middle of the positioning rod (13), and the positioning block (45) has a through hole (46) connecting to the moving groove (41).

9. The adjustable seat tray according to claim 8, characterized in that: The rotating sleeve (42) has a screw hole (47) at its end, which matches the through hole (46), and the base (1) has a disassembly port (48) that matches the through hole (46).

10. The adjustable seat tray according to claim 6, characterized in that: The adjustment handle (12) has a pressing lever (16) on its side.

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