Folding chair with adjustable back and stepless adjustment ejection lifting function

Abstract

The utility model relates to the technical field of folding chairs, in particular to a back-adjustable folding chair capable of realizing stepless adjustment, ejection and lifting, which adopts the technical scheme that the back-adjustable folding chair comprises two groups of front legs and two groups of rear legs, the two groups of front legs are connected through a connecting rod I, and the connecting rod II is connected with the connecting rod II through a connecting rod II; the front legs and the rear legs are connected through second connecting rods, the two sets of rear legs are connected through second connecting rods, a baffle is fixedly installed between the front legs, a first telescopic rod is arranged at the top of the baffle, and a first spring is arranged at the bottom of the baffle. A user can conveniently adjust a proper backrest angle, folding is also convenient, and the practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of folding chairs, in particular to a folding chair with an adjustable back and stepless adjustment for ejection and lifting. Background Art

[0002] The folding chair is mainly composed of thickened steel pipes and Oxford cloth. The surface of the steel pipe is sprayed with plastic to prevent rust and look beautiful. In addition, the important stress-bearing parts are treated with process mechanics to greatly enhance the load-bearing capacity. The specifications of Oxford cloth are mainly 600D or 800D. Most folding beds use a double-layer cloth structure to improve the service life and comfort of the seat. The folding connection parts are connected with galvanized rivets and original plastic parts. According to the characteristics of different products, leaky cup nets, operation panels, storage bags, footrests, sun visors and other designs are added. The service life of the seat is no less than that of a plastic injection-molded seat, and it is more convenient to carry. It is a folding chair often used for home and outdoor leisure.

[0003] The legs of current folding chairs have an extendable structure, but their positioning is fixed by pins and through holes, and cannot be adjusted steplessly. When the pins do not extend into the through holes, the extended legs need to be manually pulled out, or due to the weight of the extended legs, the folding chair is shaken to make the extended legs move down naturally. This operation method has a poor user experience, and the backrest of current folding chairs is usually inconvenient to fold;

[0004] Therefore, it is necessary to invent a folding chair with an adjustable back and stepless adjustment and ejection lifting. Utility Model Content

[0005] To this end, the utility model provides a folding chair with an adjustable back and stepless adjustment of ejection lifting to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a folding chair with adjustable back and stepless adjustment and ejection lifting, comprising front legs and rear legs, the front legs are provided with two groups, the rear legs are provided with two groups, the two groups of the front legs are connected by a connecting rod 1, the front legs and the rear legs are connected by a connecting rod 2, and the two groups of the rear legs are connected by a connecting rod 2, a baffle is fixedly installed in the middle of the front leg, a telescopic rod 1 is provided at the top of the baffle, a spring 1 is provided at the bottom of the baffle, a telescopic rod 2 is provided at the bottom of the spring 1, a support foot is fixedly installed at the bottom of the telescopic rod 2, and grooves are evenly provided on the telescopic rod 2, an adjustment block is installed at the bottom of the front leg, a through hole is provided at the position of the front leg near the adjustment block, a button is rotatably connected to the adjustment block through an axle rod, a spring 2 is installed on one side of the button, a positioning pin is provided on the other side of the button, the positioning pin extends into the through hole and is connected in the groove, and the difference structure between the rear legs and the front legs is that the top of the telescopic rod 1 of the rear leg is connected to the backrest rod through a stepless rotation adjustment component;

[0007] The stepless rotation adjustment assembly includes a second connection block, which is fixed to the top of the telescopic rod of the rear leg, a lower connection sleeve is fixed to the top of the second connection block, a first connection end plate is fixed to the top of the lower connection sleeve, and a hexagonal nut is embedded in the center of the end of the first connection end plate;

[0008] The stepless rotation adjustment assembly also includes a second connecting end plate, the center of the second connecting end plate is threadedly connected to an adjusting bolt, the adjusting bolt passes through a hexagonal nut, and the surface of the adjusting bolt is threadedly connected to the hexagonal nut, an upper connecting sleeve is fixed to the top end of the second connecting end plate, the bottom end of the backrest rod is inserted into the upper connecting sleeve, and the bottom end of the backrest rod and the upper connecting sleeve are fixedly connected by a fixing screw.

[0009] Preferably, the top of the telescopic rod of the front leg is fixedly installed with a connecting block, and two groups of the connecting rods are provided. The two groups of the connecting rods are cross-designed and connected by an axle pin in the middle. The top of the connecting rod is rotatably connected to the connecting block, and the bottom of the connecting rod is rotatably connected to the adjusting block, and the top of the connecting rod extends out of the front leg.

[0010] Preferably, the connecting rod 2 is provided with two groups, the two groups of connecting rod 2 are cross-designed and connected by an axle pin in the middle, the top of the connecting rod 2 is rotatably connected to the connecting block 2, and the bottom of the connecting rod 2 is rotatably connected to the adjusting block.

[0011] Preferably, the groove is designed as a barb-shaped slot.

[0012] The beneficial effects of the utility model are as follows: a baffle is fixedly installed in the middle of the front legs, a telescopic rod is arranged on the top of the baffle, a spring is arranged on the bottom of the baffle, a telescopic rod is arranged on the bottom of the spring, a supporting foot is fixedly installed on the bottom of the telescopic rod, and the telescopic rod is extended by setting a pair of springs, which is more efficient and there is no need to shake the folding chair to extend the legs;

[0013] Grooves are evenly arranged on the second telescopic rod, an adjustment block is installed at the bottom of the front leg, a through hole is opened at the position of the front leg near the adjustment block, a button is connected to the adjustment block by rotating the shaft rod, a spring second is installed on one side of the button, and a positioning pin is arranged on the other side of the button, the positioning pin extends into the through hole and is connected to the groove, and the positioning pin of the button is connected to the groove, so that the second telescopic rod has a stepless adjustment effect, which is more convenient to use;

[0014] The backrest rod and the telescopic rod of the rear legs can also realize the function of stepless rotation adjustment, so as to realize stepless adjustment of the backrest, which is convenient for users to adjust the appropriate backrest angle and also convenient for folding, thereby improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A front view of the folding chair frame provided by the utility model;

[0016] Figure 2 A left view of the folding chair frame provided by the utility model;

[0017] Figure 3 A schematic diagram of the front leg structure provided by the utility model;

[0018] Figure 4 A schematic diagram of the structure of the rear legs and backrest rod provided by the utility model;

[0019] Figure 5 A top view of the adjustment block provided by the utility model;

[0020] Figure 6 A schematic diagram of the button structure provided by the utility model;

[0021] Figure 7 A schematic diagram of the structure of the stepless rotation adjustment assembly provided by the utility model;

[0022] Figure 8 This is a structural schematic diagram of the first connecting end plate and the hexagonal nut provided by the utility model.

[0023] In the figure:

[0024] Front leg 100, baffle 110, telescopic rod 1 120, spring 1 130, telescopic rod 2 140, groove 141, support foot 150, through hole 160, rear leg 200, backrest rod 210, connecting block 1 300, connecting block 2 400, lower connecting sleeve 410, first connecting end plate 411, hexagonal nut 412, second connecting end plate 420, upper connecting sleeve 421, fixing screw 422, adjusting bolt 430, adjusting block 500, shaft rod 510, button 520, spring 2 530, locating pin 540, connecting rod 1 600, connecting rod 2 700. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] Refer to the attached Figure 1-8 The utility model provides a folding chair with adjustable back and stepless adjustment and ejection lifting, comprising front legs 100 and rear legs 200. The front legs 100 are provided with two groups, and the rear legs 200 are provided with two groups. The two groups of front legs 100 are connected by a connecting rod 1 600, the front legs 100 and the rear legs 200 are connected by a connecting rod 2 700, and the two groups of rear legs 200 are connected by a connecting rod 2 700. When the front legs 100 and the rear legs 200 are folded toward the middle, the connecting rod 1 600 and the connecting rod 2 700 are folded toward the middle, so that the folding chair is folded;

[0027] A baffle 110 is fixedly installed in the middle of the front leg 100, a telescopic rod 120 is provided on the top of the baffle 110, a spring 130 is provided at the bottom of the baffle 110, a telescopic rod 2 140 is provided at the bottom of the spring 130, a support foot 150 is fixedly installed at the bottom of the telescopic rod 2 140, and the telescopic rod 2 140 is extended by setting the spring 130, which is more efficient and does not need to shake the folding chair to extend the legs. The telescopic rod 120 and the front leg 100 have positioning protrusions to prevent the telescopic rod 120 from extending out of the front leg 100, and a positioning protrusion is provided between the telescopic rod 2 140 and the front leg 100 to prevent the telescopic rod 2 140 from extending out of the front leg 100. The telescopic rod 2 140 and the rear leg 200 are designed in the same way;

[0028] Grooves 141 are evenly provided on the telescopic rod 140, an adjustment block 500 is installed at the bottom of the front leg 100, a through hole 160 is provided at a position of the front leg 100 near the adjustment block 500, and a button 520 is rotatably connected to the adjustment block 500 through an axle rod 510, a spring 530 is installed on one side of the button 520, and a positioning pin 540 is provided on the other side of the button 520, the positioning pin 540 extends into the through hole 160 and is connected to the groove 141, and the positioning pin 540 of the button 520 is connected to the groove 141, so that the telescopic rod 140 has a stepless adjustment effect, and is more convenient to use;

[0029] The rear leg 200 is structurally different from the front leg 100 in that the top of the telescopic rod 120 of the rear leg 200 is connected to the backrest rod 210 through a stepless rotation adjustment assembly, and the stepless rotation adjustment assembly includes a connecting block 200, which is fixed to the top of the telescopic rod 120 of the rear leg 200, and a lower connecting sleeve 410 is fixed to the top of the connecting block 200, and a first connecting end plate 411 is fixed to the top of the lower connecting sleeve 410, and a hexagonal nut 412 is embedded in the center of the end of the first connecting end plate 411, and the stepless rotation adjustment assembly also includes a second connecting end plate 420, and the center of the second connecting end plate 420 is threadedly connected with an adjusting bolt 430, the adjusting bolt 430 passes through the hexagonal nut 412, and the surface of the adjusting bolt 430 is threadedly connected to the hexagonal nut 412, and an upper connecting sleeve 421 is fixed to the top of the second connecting end plate 420, and the bottom end of the backrest rod 210 is inserted into the upper connecting sleeve 421 The bottom end of the backrest rod 210 is fixedly connected to the upper connecting sleeve 421 by a fixing screw 422. Specifically, under the threaded connection of the adjusting bolt 430 and the hexagonal nut 412, the first connecting end plate 411 and the second connecting end plate 420 can be tightened and fixed. Therefore, the user can manually rotate the adjusting bolt 430 to control whether the first connecting end plate 411 and the second connecting end plate 420 are tightened, so that the relative rotation angle between the first connecting end plate 411 and the second connecting end plate 420 can be adjusted, that is, the relative rotation angle between the backrest rod 210 and the telescopic rod 120 of the rear leg 200 can be adjusted, that is, the backrest rod 210 and the telescopic rod 120 of the rear leg 200 can realize the function of stepless rotation adjustment, thereby realizing stepless adjustment of the backrest, which is convenient for the user to adjust the appropriate backrest angle and also convenient for folding, thereby improving practicality.

[0030] The top of the telescopic rod 120 of the front leg 100 is fixedly installed with a connecting block 300, and two groups of connecting rods 600 are provided. The two groups of connecting rods 600 are cross-designed and connected by an axle pin in the middle. The top of the connecting rod 600 is rotatably connected to the connecting block 300, and the bottom of the connecting rod 600 is rotatably connected to the adjustment block 500. The top of the connecting rod 600 extends out of the front leg 100; Oxford cloth is installed on the connecting rod 600 and the backrest rod 210, so as to form a complete folding chair;

[0031] The second connecting rod 700 is provided with two groups, the two groups of the second connecting rod 700 are cross-designed, connected in the middle by an axle pin, the top of the second connecting rod 700 is rotatably connected to the second connecting block 400, and the bottom of the second connecting rod 700 is rotatably connected to the adjusting block 500;

[0032] The groove 141 is designed as a barb-shaped slot.

[0033] The use process of the utility model is as follows: press the button 520 to disengage the positioning pin 540 of the button 520 from the groove 141, and the telescopic rod 140 extends out of the front leg 100 through the spring 130, and then release the button 520, and the positioning pin 540 of the button 520 is inserted into the groove 141. The telescopic rod 140 is evenly provided with grooves 141 to achieve the effect of stepless adjustment. Similarly, the stepless adjustment effect of the rear leg 200 is consistent, and the user can manually rotate the adjustment bolt 430 to control the first connection Whether the end plate 411 and the second connecting end plate 420 are tightened, the relative rotation angle between the first connecting end plate 411 and the second connecting end plate 420 can be adjusted, that is, the relative rotation angle between the backrest rod 210 and the telescopic rod 120 of the rear leg 200 can be adjusted, that is, the backrest rod 210 and the telescopic rod 120 of the rear leg 200 can realize the function of stepless rotation adjustment, thereby realizing stepless adjustment of the backrest, which is convenient for users to adjust the appropriate backrest angle while also facilitating folding, thereby improving practicality.

[0034] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. A folding chair with an adjustable back and stepless adjustment for ejection lifting, comprising front legs (100) and rear legs (200), wherein the front legs (100) are provided in two groups, and the rear legs (200) are provided in two groups, wherein the two groups of the front legs (100) are connected by a connecting rod 1 (600), the front legs (100) and the rear legs (200) are connected by a connecting rod 2 (700), and the two groups of the rear legs (200) are connected by a connecting rod 2 (700), characterized in that: A baffle (110) is fixedly installed in the middle of the front leg (100), a telescopic rod (120) is provided on the top of the baffle (110), a spring (130) is provided at the bottom of the baffle (110), a telescopic rod (140) is provided at the bottom of the spring (130), a supporting foot (150) is fixedly installed at the bottom of the telescopic rod (140), grooves (141) are evenly arranged on the telescopic rod (140), an adjusting block (500) is installed at the bottom of the front leg (100), and a position of the front leg (100) near the adjusting block (500) is provided. The adjusting block (500) is connected to a button (520) by rotating through a shaft (510), a spring (530) is installed on one side of the button (520), and a positioning pin (540) is provided on the other side of the button (520), and the positioning pin (540) extends into the through hole (160) and is connected to the groove (141). The rear leg (200) is different from the front leg (100) in that the top end of the telescopic rod (120) of the rear leg (200) is connected to the backrest rod (210) through a stepless rotation adjustment component; The stepless rotation adjustment assembly comprises a second connection block (400), the second connection block (400) is fixed to the top of the telescopic rod (120) of the rear leg (200), a lower connection sleeve (410) is fixed to the top of the second connection block (400), a first connection end plate (411) is fixed to the top of the lower connection sleeve (410), and a hexagonal nut (412) is embedded in the center of the end of the first connection end plate (411); The stepless rotation adjustment assembly also includes a second connecting end plate (420), the center of the second connecting end plate (420) is threadedly connected to an adjusting bolt (430), the adjusting bolt (430) passes through the hexagonal nut (412), and the surface of the adjusting bolt (430) is threadedly connected to the hexagonal nut (412), an upper connecting sleeve (421) is fixed to the top end of the second connecting end plate (420), the bottom end of the backrest rod (210) is inserted into the upper connecting sleeve (421), and the bottom end of the backrest rod (210) and the upper connecting sleeve (421) are fixedly connected via a fixing screw (422).

2. The folding chair with adjustable back and stepless adjustment and ejection lifting according to claim 1, characterized in that: The top of the telescopic rod (120) of the front leg (100) is fixedly mounted with a connecting block (300), and two groups of connecting rods (600) are provided. The two groups of connecting rods (600) are cross-designed and connected in the middle by an axle pin. The top of the connecting rod (600) is rotatably connected to the connecting block (300), and the bottom of the connecting rod (600) is rotatably connected to the adjustment block (500). The top of the connecting rod (600) extends out of the front leg (100).

3. The folding chair with adjustable back and stepless adjustment and ejection lifting according to claim 1, characterized in that: The connecting rod 2 (700) is provided with two groups, and the two groups of connecting rod 2 (700) are cross-designed and connected by an axle pin in the middle. The top of the connecting rod 2 (700) is rotatably connected to the connecting block 2 (400), and the bottom of the connecting rod 2 (700) is rotatably connected to the adjusting block (500).

4. The folding chair with adjustable back and stepless adjustment and ejection lifting according to claim 1, characterized in that: The groove (141) is designed as a barb-shaped slot.

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