Foot rest adjusting mechanism of chair

Abstract

The utility model relates to a chair adjusting mechanism, in particular to a foot rest adjusting mechanism of a chair, which comprises a chair body, a mounting plate, sliding rails, a base and a foot support, the bottom of the chair body is fixedly connected with the mounting plate, the symmetrical sliding rails are arranged in the mounting plate, the base is slidably connected in the sliding rails, and the foot support is connected to the base. One end of the threaded rod is rotationally connected to the base, the other end of the threaded rod is connected to one side of the foot support in a penetrating mode through threads, the end of the threaded rod is fixedly connected with the first bevel gear, and one end of the limiting rod is fixedly connected to the base. The base can be pulled out from the front end of the mounting plate through the sliding rail, then the first bevel gear makes contact with and is meshed with the second bevel gear, at the moment, the threaded rod can be driven to rotate by rotating the rotating rod, the threaded rod can push the foot support forwards relative to the base, and therefore secondary extension of the foot support is achieved, and adjustment and control over the length of the foot support are achieved in this way. And the use comfort of a user is improved.

Description

Technical Field

[0001] The utility model relates to a chair adjustment mechanism, in particular to a chair footrest adjustment mechanism. Background Art

[0002] Pull-out footrests have become a common and practical feature in recent office and leisure chair designs. Typically hidden beneath the seat, they can be pulled out and adjusted to a comfortable angle and height via a mechanism (such as a swivel or slide mechanism) to provide support for the feet while resting or relaxing.

[0003] The pull-out footrest for chairs is designed to improve user comfort and user experience. After long hours of work or study, people often feel tired on their feet. A suitable footrest can provide support for the user's feet, relieve fatigue, and help promote blood circulation.

[0004] While pull-out footrests offer certain advantages in providing foot support, existing designs often suffer from a limited length, which limits their usability and comfort. For users of different heights, a footrest that's too short may not provide adequate support; while a footrest that's too long may take up too much space when not in use, potentially compromising the chair's stability and safety.

[0005] Based on the defects of the existing footrest, it is very necessary to design a chair footrest with adjustable elongation. Utility Model Content

[0006] In order to overcome the shortcomings of the existing footrest, which is limited in length and needs to be improved in terms of comfort for users of different heights, the technical problem to be solved is to provide a footrest adjustment mechanism for a chair with adjustable extension.

[0007] The technical solution is: a footrest adjustment mechanism for a chair, including a chair body, a mounting plate, a slide rail, a base and a footrest, the bottom of the chair body is fixedly connected to the mounting plate, the mounting plate is provided with symmetrical slide rails, the base is slidably connected to the slide rails, the footrest is connected to the base, and also includes a threaded rod, a first bevel gear, a limit rod, a vertical bearing, a rotating rod and a second bevel gear, one end of the threaded rod is rotatably connected to the base, and the other end is threadedly connected to one side of the footrest, the end of the threaded rod is fixedly connected to the first bevel gear, one end of the limit rod is fixedly connected to the base, and the other end is slidably connected to the On the other side of the footrest, the vertical bearing is fixed to the bottom of the mounting plate, the rotating rod is rotatably connected to the vertical bearing, the end of the rotating rod is fixed to the second bevel gear, the first bevel gear and the second bevel gear can engage with each other, the base can be pulled out from the front end of the mounting plate through the slide rail, and then the first bevel gear contacts and engages with the second bevel gear. At this time, rotating the rotating rod can drive the threaded rod to rotate, and the threaded rod can push the footrest forward relative to the base, thereby realizing the secondary extension of the footrest. The length of the footrest can also be adjusted and controlled in this way, thereby improving the user's comfort.

[0008] As a further preferred solution, a telescopic rod is also included, which is slidably connected to the rotating rod. Specifically, a disc-shaped handle is provided at the end of the rotating rod, and the telescopic rod can slide in the handle.

[0009] As a further preferred solution, it also includes a clamping seat, an extrusion rod, a contact block and a clamping block. The clamping seat is fixed to the bottom of the mounting plate, the extrusion rod is slidably connected in the clamping seat and a reset spring is connected between the two. The inner end of the extrusion rod is fixed with a clamping block, and the contact block is fixed to the end of the threaded rod. The contact block can contact the clamping block.

[0010] As a further preferred solution, a draw rope is also included, and a draw rope is provided on the front side of the footrest.

[0011] As a further preferred solution, a magnet is also included. The magnet is connected between the telescopic rod and the rotating rod, and the magnet is used to limit and fix the telescopic rod.

[0012] As a further preferred solution, an anti-skid pad is also included, and the outer portion of the extrusion rod is covered with the anti-skid pad.

[0013] The utility model has the following advantages: the base can be pulled out from the front end of the mounting plate through the slide rail, and then the first bevel gear contacts and engages with the second bevel gear. At this time, rotating the rotating rod can drive the threaded rod to rotate, and the threaded rod can push the footrest forward relative to the base, thereby realizing a secondary extension of the footrest. In this way, the length of the footrest can be adjusted and controlled, thereby improving the user's comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the mounting plate, slide rail and threaded rod of the utility model.

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the extrusion rod, return spring and contact block of the utility model.

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the protective cover, the pull rope and the magnet of the utility model.

[0018] Among them: 1-chair body, 2-mounting plate, 3-slide rail, 4-base, 5-threaded rod, 6-first bevel gear, 7-limiting rod, 8-foot support, 9-vertical bearing, 10-rotating rod, 11-second bevel gear, 12-telescopic rod, 13-card seat, 14-extrusion rod, 15-contact block, 1501-card block, 16-pull rope, 17-magnet, 18-anti-slip pad, 19-reset spring. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to specific embodiments. It should be noted that, unless otherwise specified or limited, terms such as "dispose," "install," "connect," and "connect" should be understood in a broad sense. For example, "connect" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; or it may refer to internal communication between two components. A person skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0020] Embodiment: A footrest adjustment mechanism for a chair, such as Figure 1-Figure 4As shown, it includes a chair body 1, a mounting plate 2, a slide rail 3, a base 4 and a footrest 8. The bottom of the chair body 1 is fixedly connected to the mounting plate 2, and a symmetrical slide rail 3 is provided in the mounting plate 2. The base 4 is slidably connected to the slide rail 3, and the footrest 8 is connected to the base 4. It also includes a threaded rod 5, a first bevel gear 6, a limit rod 7, a vertical bearing 9, a rotating rod 10 and a second bevel gear 11. One end of the threaded rod 5 is rotatably connected to the base 4, and the other end is threadedly connected to one side of the footrest 8. The end of the threaded rod 5 is fixedly connected to the first bevel gear 6, one end of the limit rod 7 is fixedly connected to the base 4, and the other end is slidably connected to the other side of the footrest 8. The bearing 9 is fixed to the bottom of the mounting plate 2, and the rotating rod 10 is rotatably connected to the vertical bearing 9. The end of the rotating rod 10 is fixed to the second bevel gear 11, and the first bevel gear 6 and the second bevel gear 11 can engage with each other. Therefore, the base 4 can be pulled out from the front end of the mounting plate 2 through the slide rail 3, and then the first bevel gear 6 contacts and engages with the second bevel gear 11. At this time, rotating the rotating rod 10 can drive the threaded rod 5 to rotate, and the threaded rod 5 can push the footrest 8 forward relative to the base 4, thereby realizing the secondary extension of the footrest 8. The length of the footrest 8 can also be adjusted and controlled in this way, thereby improving the user's comfort.

[0021] like Figure 2 As shown, it also includes a telescopic rod 12, which is slidably connected to the rotating rod 10. Specifically, a disc-shaped handle is provided at the end of the rotating rod 10. The telescopic rod 12 can slide in the handle, and the staff can rotate the handle through the telescopic rod 12.

[0022] like Figure 3 and Figure 4 As shown, it also includes a base 13, an extrusion rod 14, a contact block 15 and a block 1501. The base 13 is fixedly connected to the bottom of the mounting plate 2, the extrusion rod 14 is slidably connected to the base 13 and a return spring 19 is connected between the two. The inner end of the extrusion rod 14 is fixedly connected to a block 1501, and the contact block 15 is fixedly connected to the end of the threaded rod 5. The contact block 15 can contact each other with the block 1501. After the base 4 is pulled forward, the contact block 15 will push the block 1501, and the block 1501 will slide horizontally and reset under the action of the return spring 19. The block 1501 can limit and fix the contact block 15, thereby fixing the position of the base 4. The stability of this device when the base 4 is pulled forward is worth noting that when the base 4 moves to the front end limit position of the slide rail 3, the block 1501 and the contact block 15 are in a tightly fitted clamping state, and the block 1501 can be separated from the contact block 15 by pulling the extrusion rod 14.

[0023] like Figure 4As shown, it also includes a pull rope 16, a magnet 17 and an anti-slip pad 18. A pull rope 16 is set on the front side of the footrest 8. The pull rope 16 facilitates the user to pull the footrest 8 to pull the base 4 forward relative to the mounting plate 2. A magnet 17 is connected between the telescopic rod 12 and the rotating rod 10. The magnet 17 is used to limit and fix the telescopic rod 12. The outside of the extrusion rod 14 is provided with an anti-slip pad 18 to facilitate the user to pull the extrusion rod 14.

[0024] Although the present disclosure has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-described embodiments, but should be determined not only by the appended claims but also by the equivalents of the appended claims.

Claims

1. A footrest adjustment mechanism for a chair, comprising a chair body (1), a mounting plate (2), a slide rail (3), a base (4) and a footrest (8), wherein the bottom of the chair body (1) is fixedly connected to the mounting plate (2), the mounting plate (2) is provided with symmetrical slide rails (3), the base (4) is slidably connected to the slide rail (3), and the footrest (8) is connected to the base (4), characterized in that: The invention also includes a threaded rod (5), a first bevel gear (6), a limiting rod (7), a vertical bearing (9), a rotating rod (10) and a second bevel gear (11), wherein one end of the threaded rod (5) is rotatably connected to the base (4), and the other end is threadedly connected to one side of the foot support (8), and the end of the threaded rod (5) is fixedly connected to the first bevel gear (6), one end of the limiting rod (7) is fixedly connected to the base (4), and the other end is slidably connected to the other side of the foot support (8), the vertical bearing (9) is fixedly connected to the bottom of the mounting plate (2), the rotating rod (10) is rotatably connected in the vertical bearing (9), and the end of the rotating rod (10) is fixedly connected to the second bevel gear (11), and the first bevel gear (6) and the second bevel gear (11) can mesh with each other.

2. The footrest adjustment mechanism for a chair according to claim 1, characterized in that: It also includes a telescopic rod (12), which is slidably connected to the rotating rod (10).

3. The footrest adjustment mechanism for a chair according to claim 2, characterized in that: The invention also includes a card seat (13), an extrusion rod (14), a contact block (15) and a card block (1501), wherein the card seat (13) is fixed to the bottom of the mounting plate (2), the extrusion rod (14) is slidably connected in the card seat (13) and a return spring (19) is connected between the two, the inner end of the extrusion rod (14) is fixed to the card block (1501), the contact block (15) is fixed to the end of the threaded rod (5), and the contact block (15) can contact the card block (1501) with each other.

4. The footrest adjustment mechanism for a chair according to claim 3, characterized in that: It also includes a drawstring (16), and the drawstring (16) is provided on the front side of the footrest (8).

5. The footrest adjustment mechanism for a chair according to claim 4, characterized in that: It also includes a magnet (17), and the magnet (17) is connected between the telescopic rod (12) and the rotating rod (10).

6. The footrest adjustment mechanism for a chair according to claim 5, characterized in that: It also includes an anti-skid pad (18), and the outer portion of the extrusion rod (14) is provided with the anti-skid pad (18).

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