Sliding seat chassis

Abstract

The present invention discloses a novel sliding seat chassis, comprising a base and a seat surface, wherein the seat surface is slidably connected to the upper part of the base. The key feature is that multiple sets of sliding bearings are provided at the contact points between the base and the seat surface. The seat surface is slidably connected to the upper part of the base via the sliding bearings, allowing the seat surface to extend or retract above the base to accommodate people of different heights. Furthermore, the sliding bearings increase the smoothness of the seat surface's sliding motion when it needs to extend or retract, making it easier to slide, reducing friction, and improving user comfort.

Description

Technical Field

[0001] The invention relates to a seat accessory, in particular to a sliding seat chassis. Background Art

[0002] When people lean on the back of a chair, they need to have multiple aspects of comfort, such as being able to adjust the inclination of the chair back and the height of the seat at any time. However, sometimes a chair with an adjustable seat length is needed, because the length of the daylight seat is fixed. For people with different leg lengths, if the seat length of the chair cannot be adjusted, the comfort of sitting down will be different. Therefore, a chair with a fixed seat length cannot meet the needs of office workers who sit in the office for a long time. In the existing chairs with adjustable seat length, there is direct surface contact between the seat and the base. When the seat is extended or retracted, the smoothness is not high. After a long period of use, gaps may be generated due to wear. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a sliding seat chassis that increases the smoothness of the seat surface extension and retraction.

[0004] The purpose of the present invention is achieved through the following technical scheme: a sliding seat chassis, including a base and a seat surface, the seat surface is slidably connected to the top of the base, a plurality of sets of sliding bearings are provided at the contact point between the base and the seat surface, and the seat surface is slidably connected to the top of the base through sliding bearings.

[0005] As a preferred embodiment, a square flange is provided at the edge of the base, a groove is provided on the bottom surface of the seat surface to engage with the square flange, and the sliding bearing is installed on the step surface outside the square flange.

[0006] As a preferred embodiment, a row of parallel slots are provided on the bottom edge of the base, and correspondingly, a latch tongue cooperating with the slots is provided on the bottom surface of the seat, the latch tongue moves in a square slide groove, and a restoring spring is provided at the bottom of the square slide groove.

[0007] As a preferred embodiment, a through avoidance groove is provided where the seat surface abuts against the sliding bearing, and a bolt is fixed to the base on one side of the sliding bearing, the bolt passes through the avoidance groove and the diameter of the bolt head is greater than the width of the avoidance groove.

[0008] As a preferred embodiment, the seat surface is provided with a bearing cover capable of covering one group of sliding bearings, and the bearing cover is provided with a U-shaped groove that fits the sliding bearing. When the seat surface slides to the front end, the U-shaped groove fits the sliding bearing to increase friction.

[0009] As a preferred embodiment, the U-shaped groove is composed of a magnetic material, and the constituent material of the sliding bearing includes an iron material.

[0010] As a preferred embodiment, a protruding wedge-shaped rod is provided on the side of the rolling bearing, and correspondingly, the bearing cover is provided with a sliding groove for the wedge-shaped rod.

[0011] As a preferred embodiment, the base includes a chassis fixed to the chair leg, a sliding seat, an adjustment mechanism and a backrest fixing plate, the sliding seat is slidably connected to the chassis, the backrest fixing plate is hinged to the chassis, the middle part of the backrest fixing plate is hingedly connected to the sliding seat, and a spring seat is provided at the other end of the chassis, wherein the sliding seat is provided with a main spring matching the spring seat, a screw is provided in the middle of the main spring, a limiting seat for the screw is provided on the sliding seat, the wire control device includes a pull wire and a rotating wheel, the rotating wheel rotates on the limiting seat, and a locking nut for fixing the screw is provided on the inner surface of the rotating wheel; the adjustment mechanism includes an adjusting handle, a first spring and a second spring arranged on both sides of the main spring, a first bolt and a second bolt are respectively provided in the middle of the first spring and the middle of the second spring, the sliding seat is respectively provided with a first nut and a second nut matching the first bolt and the second bolt, and the adjusting handle is rotated to adjust the rotation depth of the first bolt and the second bolt relative to the first nut and the second nut respectively.

[0012] Compared with the prior art, the present invention has the following advantages and effects:

[0013] 1. The chair surface of the present invention can be extended or retracted above the base to accommodate people of different heights. The seat surface is slidably connected to the top of the base through a sliding bearing. When the seat surface needs to be extended or retracted, the sliding bearing can increase the smoothness of the sliding of the seat surface, making it easier to slide, reducing friction, and can control the extension length of the chair surface at any time to meet different needs, with a high overall texture.

[0014] 2. When the seat slides to the rear stage, the U-shaped groove fits tightly against the sliding bearing, and the movement speed of the seat slows down. The magnetic material in the U-shaped groove can absorb the iron material of the sliding bearing, so that the sliding bearing automatically sits in the U-shaped groove, which can increase the automatic seating of the seat in the rear stage.

[0015] 3. A protruding wedge rod is provided on the side of the rolling bearing, and correspondingly, the bearing cover is provided with a sliding groove for the wedge rod. When the wedge rod enters the sliding groove from the outside to the inside, the friction between the two gradually increases, and the moving speed of the seat surface gradually decreases. When the wedge rod completely enters the sliding groove, the seat surface can no longer move forward, preventing the seat surface from moving excessively and improving the service life of the entire structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the sliding seat chassis.

[0017] Figure 2 is a side view of the sliding seat chassis.

[0018] Figure 3 This is the front view of the chassis.

[0019] Figure 4 This is a bottom view of the seat.

[0020] Figure 5 It is a three-dimensional image of the chassis.

[0021] Figure 6 This is a three-dimensional picture of the chassis. (The square flange is omitted)

[0022] Figure 7 It is a three-dimensional diagram of a sliding bearing.

[0023] Figure 8 This is a three-dimensional view of the bearing cap. (bottom view) DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0025] Reference Figure 1-Figure 2 The sliding seat chassis includes a base 1 and a seat 2, the seat 2 is slidably connected to the top of the base 1, and a plurality of sliding bearings 3 are provided at the contacting place between the base 1 and the seat 2, and the seat 2 is slidably connected to the top of the base 2 through the sliding bearings 3. When the seat 2 needs to be extended or retracted, the sliding bearings 3 can increase the smoothness of the sliding of the seat 2, making it easier to slide and reducing friction.

[0026] Reference Figure 3-Figure 6 In order to reduce the height and space, a square flange 4 is provided on the edge of the base 2, and a groove 5 is provided on the bottom surface of the seat surface 2 to engage with the square flange 4. All components in the base 2 are installed in the square flange, and the sliding bearing 3 is installed on the step surface 6 outside the square flange 4. A step connected to the step surface 6 is provided under the seat surface 2. When the seat surface 2 slides, the step slides along the step surface 6.

[0027] In order to control the extension length of the seat 2, it is necessary to stop the seat 2 from sliding at any time. A row of parallel slots 7 are provided at the bottom edge of the base 1. Correspondingly, a latch (not shown in the figure) cooperating with the slot 7 is provided on the bottom surface of the seat 2. The latch moves in a square slide groove 8. A restoring spring (not shown in the figure) is provided at the bottom of the square slide groove 8. By pressing and pulling the latch by hand, the latch enters the corresponding slot 7, so that the seat 2 can no longer slide, and the restoring spring makes the latch tightly fit into the slot 7.

[0028] In order to fix the seat 2 relative to the base 1 in the vertical direction and prevent the seat 2 from breaking away from the base 1 in the vertical direction, a through avoidance groove 9 is provided at the place where the seat 2 fits the sliding bearing 3, and a bolt (not shown in the figure) is fixed to one side of the sliding bearing 3 of the base 1, and the bolt passes through the avoidance groove 9 and the diameter of the bolt head is greater than the width of the avoidance groove 9. When the seat 2 slides, the bolt slides in the avoidance groove 9, and the bolt head can prevent the seat 2 from leaving the base 1 in the vertical direction, and when the bolt abuts against the edge of the avoidance groove 9, the seat 1 stops sliding.

[0029] Reference Figure 4 , Figure 7 and Figure 8 As a preferred embodiment, in order to slow down the speed of the seat surface 2 in the latter stage of sliding forward and the former stage of retraction, to prevent the seat surface 2 from being in hard contact with the base 1 due to excessive force applied by a person, and to make the entire seat surface 1 have an automatic magnetic suction function and improve the overall texture of the chair, the seat surface 2 is provided with a bearing cover 10 capable of covering one group of sliding bearings 3, and a U-shaped groove 11 is provided in the bearing cover 10 to fit the sliding bearing 3. When the seat surface 2 slides to the front end, the U-shaped groove 11 fits with the sliding bearing 3 to increase the friction. When the seat surface 2 just starts to slide forward, the speed is relatively fast. When the seat surface 2 slides When it moves to the later stage, the bearing cover 10 enters the space of the sliding bearing 3, and the U-shaped groove 11 fits tightly on the sliding bearing 3, the friction force increases greatly, the sliding of the sliding bearing 3 is affected, and the movement speed of the seat 2 slows down. In order to increase the magnetic attraction, the U-shaped groove 11 is composed of magnetic material, and the constituent materials of the sliding bearing 3 include iron material. The magnetic material can absorb the iron material, so that the sliding bearing 3 automatically sits in the U-shaped groove 11, which can increase the automatic seating of the seat 2 in the later stage, and when the sliding bearing 3 fits tightly in the U-shaped groove 11, the seat 2 stops sliding, and the overall texture is very high. In order to decelerate the seat 2 more fully and prevent the seat 2 from leaving the base 1 in the horizontal direction, a protruding wedge rod 12 is provided on the side of the rolling bearing 3, and correspondingly, the bearing cover 10 is provided with a sliding groove 13 for the wedge rod 12. When the wedge rod 12 enters the sliding groove 13 from the outside to the inside, the friction between the two gradually increases, and the moving speed of the seat 2 gradually decreases. When the wedge rod 12 completely enters the sliding groove 13, the seat 2 can no longer move forward.

[0030] Reference Figure 5-Figure 6In order to adjust the inclination of the chair back (not shown in the figure), the base 1 also includes a chassis 14 arranged in the square flange 4 and fixed to the chair leg, a sliding seat 15, an adjustment mechanism and a backrest fixing plate 16, wherein the sliding seat 15 is slidably connected to the chassis 1, and the backrest fixing plate 16 is fixedly connected to the backrest, one end of the backrest fixing plate 16 is hinged to the chassis 1, and the middle part of the backrest fixing plate 16 is hinged to the sliding seat 15, and the other end of the chassis 1 is provided with a spring seat 17, wherein the sliding seat 15 is provided with a main spring 18 matched with the spring seat 17, and the main spring 1 A screw rod 19 is provided in the middle of 8, and a limiting seat of the screw rod 19 is provided on the sliding seat 15. The wire control device includes a pull wire 20 and a rotating wheel 21. The rotating wheel 21 rotates on the limiting seat 22. A locking nut 23 for fixing the screw rod 19 is provided on the inner surface of the rotating wheel 21. When the pull wire 20 pulls the rotating wheel 21, the locking nut 23 rotates accordingly to adjust the combination orientation of the locking nut 23 and the screw rod 19. The screw rod 19 is fixed by the locking nut 23, so that the sliding seat 15 cannot return to the initial position, the tilt angle of the chair back fixing plate 16 is fixed, and the angle of the chair back is fixed at the same time.

[0031] Reference Figure 6 The adjustment mechanism includes an adjustment handle 24, a first spring 25 and a second spring 26 arranged on both sides of the main spring 18, a first bolt 27 and a second bolt 29 are respectively arranged in the middle of the first spring 25 and the middle of the second spring 26, and the sliding seat 15 is respectively provided with a first nut 28 and a second nut 30 matched with the first bolt 27 and the second bolt. The adjustment handle 24 is rotated to adjust the rotation depth of the first bolt 27 and the second bolt relative to the first nut 28 and the second nut. In this way, the preload force of the first spring 10 and the second spring 12 can be adjusted, so as to achieve the purpose of adjusting the softness and hardness of the seat back when reclining.

[0032] Preferably, the adjustment handle 24 is connected to a driving gear 31, and the driving gear 31 drives the rotating shaft 32 to rotate through the driven gear. Two bevel wheels 33 are provided on the rotating shaft 32. The first bolt 27 and the second bolt 29 are respectively provided with bevel gears 34 at the rear ends, and the bevel gears 34 are toothed with the bevel wheels 33. The adjustment handle 24 drives the first bolt 27 and the second bolt 29 to rotate. The two bevel wheels 33 are distributed in mirror symmetry and are respectively arranged at both ends of the rotating shaft 32. When the two bevel wheels 33 rotate, the first bolt 27 and the second bolt 29 rotate in opposite directions, and the first bolt 27 and the second bolt 29 advance and retreat at the same time. The first nut 28 and the second nut 30 have opposite thread directions.

[0033] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A sliding seat chassis, comprising a base and a seat surface, wherein the seat surface is slidably connected to the base, characterized in that: The contact area between the base and the seat surface is provided with multiple groups of sliding bearings, and the seat surface is slidably connected to the top of the base through the sliding bearing; the edge of the base is provided with a square flange, and the bottom surface of the seat surface is provided with a groove that is engaged with the square flange, and the sliding bearing is installed on the step surface outside the square flange; the bottom surface edge of the base is provided with a row of parallel clamping grooves, and correspondingly, the bottom surface of the seat surface is provided with a clamping tongue that cooperates with the clamping groove, and the clamping tongue moves in the square slide groove, and the square slide groove is opened on the seat surface, and a restoring spring is provided at the bottom of the square slide groove; a through avoidance groove is provided at the place where the seat surface fits the sliding bearing, and the base is fixed with a bolt on one side of the sliding bearing, and the bolt passes through the avoidance groove and the diameter of the bolt head is greater than the width of the avoidance groove; the seat surface is provided with a bearing cover that can cover one group of sliding bearings, and a U-shaped groove that fits the sliding bearing is provided in the bearing cover. When the seat surface slides to the front end, the U-shaped groove fits the sliding bearing to increase friction.

2. A sliding seat chassis according to claim 1, characterized in that: The U-shaped groove is composed of magnetic material, and the component material of the sliding bearing includes iron material.

3. A sliding seat chassis according to claim 2, characterized in that: A protruding wedge-shaped rod is provided on the side of the sliding bearing, and correspondingly, the bearing cover is provided with a sliding groove for the wedge-shaped rod.

4. A sliding seat chassis according to claim 1, characterized in that: The base includes a chassis fixed to the chair legs, a sliding seat, an adjustment mechanism, a backrest fixing plate and a wire control device, the sliding seat is slidably connected to the chassis, the backrest fixing plate is hinged to the chassis, the middle part of the backrest fixing plate is hingedly connected to the sliding seat, and a spring seat is provided at the other end of the chassis, wherein the sliding seat is provided with a main spring matching the spring seat, a screw is provided in the middle of the main spring, a limiting seat of the screw is provided on the sliding seat, and the wire control device includes a pull wire and a rotating wheel, the rotating wheel rotates on the limiting seat, and a locking nut for fixing the screw is provided on the inner surface of the rotating wheel; the adjustment mechanism includes an adjusting handle, a first spring and a second spring arranged on both sides of the main spring, a first bolt and a second bolt are respectively provided in the middle of the first spring and the middle of the second spring, the sliding seat is respectively provided with a first nut and a second nut matching the first bolt and the second bolt, and the adjusting handle is rotated to adjust the rotation depth of the first bolt and the second bolt relative to the first nut and the second nut respectively.

5. A sliding seat chassis according to claim 4, characterized in that: The adjusting handle is connected to a driving gear, and the driving gear drives a rotating shaft to rotate through a driven gear. Two bevel wheels are arranged on the rotating shaft. The rear ends of the first bolt and the second bolt are respectively provided with bevel gears, and the bevel gears are toothed with the bevel wheels. The adjusting handle drives the first bolt and the second bolt to rotate; the two bevel wheels are distributed in a mirror-symmetrical manner and are respectively arranged at both ends of the rotating shaft, and the thread directions of the first nut and the second nut are opposite.

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