Universal rapid backrest adjusting device

Abstract

The invention provides a universal rapid backrest adjusting device, and relates to the technical field of backrests, the universal rapid backrest adjusting device comprises a backrest, the reverse side of the backrest is fixedly connected with a groove connecting seat, a groove of the groove connecting seat is movably connected with a ball head body, the bottom of the ball head body is fixedly connected with a telescopic rod, and the bottom of the telescopic rod is fixedly connected with a rotating seat; the bottom of the rotating seat is fixedly connected with the base, and the ball body and the rotating seat are fixedly connected with the two ends of the tension spring respectively. According to the universal rapid backrest adjusting device, the orientation of the backrest can be changed in any direction along with the sitting posture, the backrest can be rapidly extended and automatically retracted, the backrest can be rapidly folded, disassembled and assembled and fixed at any angle, and the base can be replaced to adapt to various scenes.

Description

Technical Field

[0001] The invention relates to the technical field of backrests, in particular to a universal quick-adjusting backrest device. Background Art

[0002] In life, in the use scenarios of backless seats, in the use scenarios of learning or working where you need to sit upright, and in the scenarios where the original backrest does not provide sufficient support for the waist, there is a possibility of backache or back pain due to the lack of waist support. The existing backrests have a small number of adjustment positions, a narrow adjustment range, a complex structure, or cannot follow human activities, or are complicated to install and disassemble, or occupy a large space, or have poor use. Therefore, it is urgent to design a universal quick-adjustment backrest device to solve the problems existing in the existing backrest adjustment. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a universal quick-adjustable backrest device, which has the advantages of simple structure, convenient operation, wide adjustment range, and adaptability to most usage scenarios through quick adjustment and replacement of the base.

[0004] It includes a backrest, a groove connecting seat, a ball head body, a telescopic rod, a rotating seat, a base, and a tension spring; the back side of the backrest is fixedly connected to the groove connecting seat, the groove of the groove connecting seat is movably connected to the ball head body, the bottom of the ball head body is fixedly connected to the telescopic rod, the bottom of the telescopic rod is fixedly connected to the rotating seat, the bottom of the rotating seat is fixedly connected to the base, and the ball head body and the rotating seat are respectively fixedly connected to the two ends of the tension spring.

[0005] Furthermore, the groove connecting seat includes a groove seat and a groove rotating shaft, the groove part of the groove seat has a through hole on each of the left and right sides for connecting with the groove rotating shaft, the groove seat is fixedly connected to the groove rotating shaft, the bottom surface of the groove seat is provided with a through hole connected to the backrest, and the groove part of the groove seat has two upper and lower notches in a direction perpendicular to the groove rotating shaft.

[0006] Furthermore, the interior of the spherical part of the ball head body has symmetrical fan-shaped hollowing, the spherical part is movably connected to the groove shaft, and the columnar part of the ball head body is fixedly connected to the inner tube.

[0007] Furthermore, the telescopic rod includes a locking mechanism, an outer tube, and an inner tube; the locking mechanism includes an outer tube connecting seat, a spring, and a pressing plate; or the telescopic rod includes a rotary cap, an outer tube, and an inner tube.

[0008] Furthermore, a right-angled trapezoidal body with an inclined surface facing downward is hollowed out in the upper half of the outer tube connecting seat, the lower half of the outer tube connecting seat is fixedly connected to the outer tube, and a through hole is provided in the middle of the outer tube connecting seat for the inner tube to pass through.

[0009] Furthermore, there is a through hole in the middle of the pressing plate with a diameter greater than the diameter of the inner tube, the spring and the pressing plate are located in the right-angled trapezoid, the spring is located above the pressing plate, the pressing plate protrudes downward along the inclined surface of the right-angled trapezoid, and the spring and the pressing plate are sleeved on the outside of the inner tube.

[0010] Furthermore, the rotating seat includes a movable end, a first fixed rod, a fixed end, a second fixed rod, an eccentric circular connecting rod, and a nut. The movable end is fixedly connected to the outer tube via the first fixed rod, and the fixed end is fixedly connected to the base via the second fixed rod.

[0011] Furthermore, the eccentric connecting rod includes a lever, a connecting rod, a sliding seat, and a lever shaft. The circular head portion of the lever has an eccentric through hole. The lever shaft is rotatably connected to the connecting rod. The sliding seat and the nut are sleeved on the connecting rod.

[0012] Further, the movable end is rotatably connected to the fixed end through the eccentric circular connecting rod; or the rotating seat includes a movable end, a fixed end, a nut, and a bolt, the movable end is fixedly connected to the outer tube through a first fixed rod, the fixed end is fixedly connected to the base through a second fixed rod, the contact surface between the movable end and the fixed end has meshing teeth, and the movable end and the fixed end are fixedly connected by bolts and nuts.

[0013] Furthermore, the ball head body is fixedly connected to one end of the tension spring, and the rotating body is fixedly connected to the other end of the tension spring via the first fixing rod.

[0014] The beneficial effects of the present invention are as follows: the present invention creatively uses a hollowed-out ball head body and a groove seat as a connecting mechanism in a universal quick-adjustable backrest device to improve the fit and followability of the backrest; uses a pressing plate and an inner tube made of materials of different hardness so that the pressing plate is embedded in the inner tube under the elastic force of the spring, so that the backrest can be stretched in the direction of the spring compression without pressing the pressing plate, and cannot be retracted in the direction of the elastic force; uses a tension spring to connect the ball head body and the rotating seat, so that the backrest can automatically retract when the pressing plate is pushed upward, thereby improving the speed of adjusting the backrest distance; uses the radius change of the eccentric circle lever as the locking mechanism of the rotating seat to realize a large range of stepless adjustment of the backrest angle and improve speed; and uses a preset base replacement interface to improve scene adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a front view of a universal quick-adjustable backrest device in an embodiment of the present invention.

[0017] Figure 2 It is a left side view of the universal quick-adjustable backrest device in the embodiment of the present invention.

[0018] Figure 3 It is a rear view of the universal quick-adjustable backrest device in the embodiment of the present invention.

[0019] Figure 4 Schematic diagram of the structure of a universal quick-adjustable backrest device in an embodiment of the present invention.

[0020] Figure 5 Schematic diagram of the structure of the tension spring connecting part in an embodiment of the present invention.

[0021] Figure 6 Schematic diagram of the structure of the locking mechanism when locked in the embodiment of the present invention.

[0022] Figure 7 Schematic diagram of the structure when the locking mechanism is released in an embodiment of the present invention.

[0023] Figure 8 Schematic diagram of the structure of the locking mechanism when locked in the embodiment of the present invention.

[0024] Fig. 9 Schematic diagram of the structure when the locking mechanism is released in an embodiment of the present invention.

[0025] Fig.10 Schematic diagram of the structure of the rotating seat in the embodiment of the present invention.

[0026] In the figure: 1-backrest; 2-groove connecting seat; 21-groove seat; 22-groove rotating shaft; 3-ball head; 4-telescopic rod; 41-locking mechanism; 42-outer tube; 43-inner tube; 44-swivel cap; 411-outer tube connecting seat; 412-spring; 413-pressing plate; 5-rotating seat; 51-movable end; 511-first fixed rod; 52-fixed end; 521-second fixed rod; 53-eccentric circular connecting rod; 531-shift rod; 532-connecting rod; 533-sliding seat; 534-shift rod rotating shaft; 54-nut; 55-bolt; 6-base; 7-tension spring. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work should fall within the scope of protection of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be understood as limitations on the present invention.

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figure 1 — Figure 5 As shown, the universal quick-adjustable backrest device of the embodiment of the present invention comprises a backrest 1, a groove connection seat 2, a ball head body 3, a telescopic rod 4, a rotating seat 5, a base 6, and a tension spring 7. The ball head body 3 can make the backrest 1 change in any direction following the human body posture; the telescopic rod 4 can quickly adjust the distance between the backrest 1 and the rotating seat 5; the rotating seat 5 can quickly adjust the angle between the backrest 1 and the base 6, and the separation of the movable end 51 and the fixed end 52 realizes the quick disassembly and assembly of the rotating seat 5, and the replacement of different types of bases 6 can adapt to more usage scenarios.

[0030] In some embodiments of the present invention, Figure 4 As shown, the rear part of the backrest 1 is fixedly connected to the groove connecting seat 2, the groove connecting seat 2 includes a groove seat 21 and a groove rotating shaft 22, the groove seat 2 is fixedly connected to the groove rotating shaft 22, the ball head body 3 is movably connected to the groove rotating shaft 22, and the friction force generated by the interference fit between the ball head body 3 and the groove seat 21 enables the orientation of the backrest 1 to change without being affected by gravity. The movement of the ball head body 3 around the groove rotating shaft 22 can make the orientation of the backrest change in any direction following the human body posture, thereby improving the comfort of use.

[0031] like Figure 7 and Figure 8 As shown, the telescopic rod 4 includes a locking mechanism 41, an outer tube 42, and an inner tube 43. The locking mechanism 41 includes an outer tube connection seat 411, a spring 412, and a pressing plate 413. The outer tube connection seat 411 is fixedly connected to the outer tube 42, the inner tube 43 is fixedly connected to the ball head body 3, the inner tube 43 is sleeved on the inner ring of the outer tube connection seat 411, the spring 412 and the pressing plate 413 are sleeved on the outer side of the inner tube 43, the pressing plate 413 and the inner tube 43 are made of materials with different hardness, and the pressing plate 413 is embedded in the inner tube 43 under the elastic force of the spring 412, so that the inner tube 43 can be stretched outward without pressing the pressing plate 413 but cannot be retracted inward, and the tension spring 7 is fixedly connected to the ball head body 3 and the rotating seat 5, so that the inner tube 43 can automatically retract when the pressing plate 413 is pushed upward, thereby improving the convenience of use.

[0032] like Figure 4 and Figure 2 As shown, the rotating seat 5 includes a movable end 51, a first fixed rod 511, a fixed end 52, a second fixed rod 521, an eccentric connecting rod 53, and a nut 54. The movable end 51 is fixedly connected to the outer tube 42 through the first fixed rod 511, and the fixed end 52 is fixedly connected to the base 6 through the second fixed rod 521. The eccentric connecting rod 53 includes a lever 531, a connecting rod 532, a sliding seat 533, and a lever shaft 534. The lever 531 is fixedly connected to the lever shaft 534, the connecting rod 532 is rotatably connected to the lever shaft 534, and the sliding seat 533 is sleeved on the connecting rod 532. The movable end 51 is rotatably connected to the fixed end 52 through the eccentric connecting rod 53. The movable end 51 and the fixed end 52 can be quickly released by lifting the lever 531, and the movable end 51 and the fixed end 52 can be quickly locked by pressing the lever 531, so as to adjust the angle between the telescopic rod 4 and the base 6, change the height of the backrest 1, and improve the convenience of use.

[0033] In some embodiments of the present invention, Fig. 9 and Fig.10 As shown, the telescopic rod 4 includes a screw cap 44, an outer tube 42 and an inner tube 43. The screw cap 44 is sleeved on the upper end of the outer tube 42, and the inner tube 43 is sleeved inside the outer tube 42. The inner tube 43 can be locked in the outer tube 42 by rotating the screw cap 44 to the bottom of the thread at the upper end of the outer tube 42.

[0034] In some embodiments of the present invention, Figure 6 As shown, the rotating seat 5 includes a movable end 51, a first fixing rod 511, a fixed end 52, a second fixing rod 521, a bolt 55, and a nut 54. The movable end 51 is fixedly connected to the outer tube 42 through the first fixing rod 511, and the fixed end 52 is fixedly connected to the base 6 through the second fixing rod 521. The contact surfaces of the movable end 51 and the fixed end 52 have meshing teeth, and the movable end 51 and the fixed end 52 are fixedly connected by bolts 55 and nuts 54.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A universal quick-adjustable backrest device, characterized in that: The invention comprises a backrest (1), a groove connection seat (2), a ball head body (3), a telescopic rod (4), a rotating seat (5), a base (6), and a tension spring (7); the backrest (1) is fixedly connected to the groove connection seat (2), the groove connection seat (2) is movably connected to the ball head body (3), the ball head body (3) is fixedly connected to the telescopic rod (4), the telescopic rod (4) is fixedly connected to the rotating seat (5), the rotating seat (5) is fixedly connected to the base (6), and the ball head body (3) and the rotating seat (5) are respectively fixedly connected to two ends of the tension spring (7).

2. The universal quick-adjustable backrest device according to claim 1, characterized in that: The groove connection seat (2) comprises a groove seat (21) and a groove shaft (22); the groove portion of the groove seat (21) has a through hole on both sides thereof for connection with the groove shaft (22); the groove seat (21) is fixedly connected to the groove shaft (22); a through hole connected to the backrest (1) is provided on the bottom surface of the groove seat (21); and the groove portion of the groove seat (21) has two upper and lower notches in a direction perpendicular to the groove shaft (22).

3. The universal quick-adjustable backrest device according to claim 1, characterized in that: The interior of the spherical part of the ball head body (3) has a cross-shaped hollowing, the bottom surface of the columnar part of the ball head body (3) has a small cylinder, the interior of the small cylinder has a through hole, and the ball head body (3) is movably connected to the groove seat (21) via the groove shaft (22).

4. The universal quick-adjustable backrest device according to claim 1, characterized in that: The telescopic rod (4) comprises a locking mechanism (41), an outer tube (42), and an inner tube (43); or the telescopic rod (4) comprises a rotary cap (44), an outer tube (42), and an inner tube (43).

5. The universal quick-adjustable backrest device according to claim 4, characterized in that: The locking mechanism (41) comprises an outer tube connection seat (411), a spring (412), and a pressing plate (413); a right-angled trapezoidal body with an inclined surface facing downward is hollowed out in the upper half of the outer tube connection seat (411); the lower half of the outer tube connection seat (411) is fixedly connected to the outer tube (42); the inner tube (43) is fixedly connected to the ball head body (3); the inner tube (43) is sleeved inside the outer tube connection seat (411); the spring (412) and the pressing plate (413) are sleeved on the outer ring of the inner tube (43); the spring (412) and the pressing plate (413) are located inside the outer tube connection seat (411); and the spring (412) and the pressing plate (413) are located inside the outer tube connection seat (411); and the spring (41 2) located above the pressing piece (413), the locking mechanism (41) can reversibly transform the inner tube (43) and the outer tube (42) between a released state and a locked state in a mechanical manner; or the outer side of the top end of the outer tube (42) has threads and is divided into four curved surfaces by four grooves, the inner diameter of the screw cap (44) decreases from bottom to top and the inner wall has threads, the screw cap (44) is sleeved on the top end of the outer tube (42), the inner tube (43) is sleeved inside the outer tube (42), and the screw cap (44) can reversibly transform the inner tube (43) and the outer tube (42) between a released state and a locked state in a mechanical manner.

6. The universal quick-adjustable backrest device according to claim 1, characterized in that: The rotating seat (5) comprises a movable end (51), a first fixing rod (511), a fixed end (52), a second fixing rod (521), an eccentric circular connecting rod (53), and a nut (54); or the rotating seat (5) comprises a movable end (51), a first fixing rod (511), a fixed end (52), a second fixing rod (521), a nut (54), and a bolt (55).

7. The universal quick-adjustable backrest device according to claim 6, characterized in that: The movable end (51) is fixedly connected to the outer tube (42) via a first fixed rod (511); the fixed end (52) is fixedly connected to the base (6) via a second fixed rod (521); the eccentric connecting rod (53) comprises a lever (531), a connecting rod (532), a sliding seat (533), and a lever rotating shaft (534); the circular head portion of the lever (531) has an eccentric through hole; the lever (531) is fixedly connected to the lever rotating shaft (534); the lever rotating shaft (534) is rotatably connected to the connecting rod (532); the sliding seat (533) and the nut (54) are sleeved on the connecting rod (532); the movable end The movable end (51) is rotatably connected to the fixed end (52) via the eccentric circular connecting rod (53), and the eccentric circular connecting rod (53) can reversibly transform the movable end (51) and the fixed end (52) between a released state and a locked state in a mechanical manner; or the movable end (51) is fixedly connected to the outer tube (42) via a first fixing rod (511), and the fixed end (52) is fixedly connected to the base (6) via a second fixing rod (521), and meshing teeth are provided on the contact surfaces between the movable end (51) and the fixed end (52), and the movable end (51) and the fixed end (52) are fixedly connected via the bolt (55) and the nut (54).

8. The universal quick-adjustable backrest device according to claim 1, characterized in that: One end of the tension spring (7) is fixedly connected to the ball head body (3), and the other end of the tension spring (7) is fixedly connected to the first fixing rod (511).

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