Liftable learning chair leg

Abstract

The utility model relates to the technical field of learning chairs, in particular to a liftable learning chair leg which comprises bottom legs arranged in pairs, a foot rest is fixed between every two adjacent bottom legs, and each bottom leg comprises a mounting leg inclined to the ground and a supporting leg fixed to the side face of the mounting leg and supported on the ground. A telescopic frame capable of achieving multi-gear height adjustment is slidably and telescopically arranged at the tops of the supporting legs, height adjustment is achieved through a gear adjusting mechanism, the gear adjusting mechanism elastically abuts against an adjusting groove through a return bolt on an adjusting knob and can be in bolt limiting with the adjusting groove, and a mounting frame parallel to the ground is fixedly arranged on the side face of the telescopic frame. By means of the mechanism, the two telescopic frames obliquely ascend and descend on the two mounting feet in a multi-gear mode, and synchronous oblique ascending and descending of the two mounting frames are achieved. The multi-gear lifting wheelchair has the advantages that the stability is higher than that of a traditional rolling wheelchair, and the multi-gear lifting wheelchair is convenient to carry and capable of adjusting the height and the posture in a multi-gear lifting mode.

Description

Technical Field

[0001] The utility model relates to the technical field of study chairs, and particularly relates to a height-adjustable chair leg for a study chair. Background Art

[0002] Although the existing study chairs have the function of height adjustment, they are inconvenient to carry and change positions, and can only be lifted axially, unable to adjust the distance between the back and the table, and cannot adjust the posture.

[0003] The utility model patent with the application number 201320181252.X relates to a hand-cranked height-adjustable study chair, including a study chair seat board, a seat board support frame, a study chair backrest board, a backrest support frame, a hand-cranked height-adjustable folding handle, a height-adjustable table leg, a support leg, a support block, and a support cross tube. The characteristics are that the study chair seat board is arranged on the seat board support frame, the left and right seat board support frames are respectively arranged on the two height-adjustable table legs, a support cross tube is arranged between the left and right seat board support frames, a hand-cranked height-adjustable folding handle is arranged on one side of the seat board support frame, a support block is arranged inside the seat board support frame, the backrest support frame is connected to the support block, the backrest support frame is fixedly connected to the seat board support frame through the support block, a study chair backrest board is arranged on one side of the backrest support frame close to the study chair seat board, and a support leg is further arranged under the height-adjustable table leg. The beneficial effect of the utility model is that the structure of the utility model is simple, the cost is low, the adjustment is convenient, and it is suitable for students of different heights.

[0004] However, although the study chair of this patent has strong stability, it is laborious to carry because it does not have rollers, and at the same time, it cannot realize multi-gear adjustment of the chair leg height, and can only be lifted axially and cannot adjust the posture. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a chair leg for a study chair with stronger stability than a traditional roller chair, which can be adjusted in height in multiple gears and can adjust the posture while being convenient to carry, aiming at the deficiencies of the above-mentioned prior art.

[0006] To achieve the above object, the following technical solution is adopted. A foot of an adjustable learning chair includes a pair of bottom feet, and a footrest is fixed between adjacent bottom feet. The bottom foot includes a mounting foot inclined to the ground and a support foot fixedly arranged on the side of the mounting foot and propping on the ground. The bottom of the mounting foot abuts against the ground, and a telescopic frame capable of multi-gear height adjustment is slidably telescoped at the top. A gear adjustment mechanism for adjusting the height gear is arranged between the mounting foot and the telescopic frame. The gear adjustment mechanism includes a plurality of equally spaced adjustment grooves axially opened along the inclined direction of the telescopic frame and an adjustment knob passing through the mounting foot and limiting with the adjustment grooves. One end of the adjustment knob extending into the adjustment groove is provided with an adjustment column extending into the adjustment groove. A return bolt for elastically extending the adjustment column into the adjustment groove is sleeved outside the adjustment column. The outer peripheral surface of the return bolt is threadedly matched with the adjustment groove. An installation frame parallel to the ground is fixedly arranged on the side surface of the telescopic frame. The gear adjustment mechanism enables the two telescopic frames to be obliquely lifted in multiple gears on the two mounting feet and realizes the synchronous oblique lifting of the two installation frames.

[0007] By adopting the above technical solution, the effect of oblique jacking is achieved by inclining the mounting foot, thereby correcting the sitting posture. The stable support of the chair foot is realized by the fixed setting of the support foot and the mounting foot. Compared with directly setting rollers at the bottom of the chair foot for support, it is more stable and not easy to move. When adjusting, simultaneously pull out the adjustment knob by a certain distance with both hands to make the adjustment column leave the adjustment groove, and at this time, the height of the telescopic frame can be adjusted. When the appropriate height is adjusted, release the hand and elastically extend the adjustment column into the adjustment groove again. A tension spring or a spring can be arranged between the return bolt and the adjustment knob so that the return bolt can elastically return. In order to make the limit between the adjustment knob and the adjustment groove closer, the adjustment knob also needs to be tightened. The thread at the outer peripheral surface of the return bolt is matched with the adjustment groove to realize spiral limit. The multiple adjustment grooves are arranged at equal intervals to make the height adjustment more controllable and the adjustment more convenient. The footrest can be used for placing the feet and also connect the two bottom feet, making the stability of the whole product higher.

[0008] A foot of an adjustable learning chair can be further set as follows: The mounting foot and the support foot are combined to form an inverted V-shaped bottom foot. A first foot sleeve is arranged at the bottom of the mounting foot, and a second foot sleeve is arranged at the bottom of the support foot. An installation inclined surface is arranged at one end of the second foot sleeve away from the first foot sleeve, and a roller is arranged on the installation inclined surface.

[0009] With the above technical solution, by setting the bottom feet in an inverted "V" shape, a triangle is formed at the bottom of the bottom feet, making the support more stable. The first foot sleeve and the second foot sleeve can be made of rubber or silicone, so that the friction on the side in contact with the ground is greater, achieving stable placement. At this time, the installation inclined plane is not in contact with the ground, so the rollers are suspended above the ground. When it is necessary to move, lift one side of the installation feet, so that the installation inclined plane is parallel to the ground. At this time, the rollers are in contact with the ground, and the chair can be moved through the rollers. While improving the stability of the chair feet, it is also very convenient to perform displacement operations.

[0010] A chair foot of an adjustable learning chair can be further set as follows: The mounting brackets are L-shaped and arranged opposite to each other.

[0011] With the above technical solution, bolt holes can be provided above the mounting brackets for the fixed installation of the chair seat. The L-shaped ends of the mounting brackets are parallel to the ground, so the chair seat is also parallel to the ground and there will be no tilting installation.

[0012] A chair foot of an adjustable learning chair can be further set as follows: A limiting post for preventing the return bolt from coming out is provided at the top of the adjusting column. A polygonal limiting cap is provided at one end of the return bolt away from the limiting post. A limiting groove with the same shape as the limiting cap is provided on the adjusting knob for the return bolt to extend into when elastically returning.

[0013] With the above technical solution, by setting a polygonal limiting cap, which can also be a hexagonal nut, the return bolt can just cooperate with the limiting groove when returning. The adjusting knob drives the return bolt through the cooperation of the limiting groove and the limiting cap. At this time, the return bolt can also be in threaded cooperation with the limiting groove, achieving tight limiting. The diameter of the limiting post is larger than the diameter of the middle through hole of the return bolt, so as to prevent the return bolt from coming out of the adjusting column.

[0014] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0015] Figure 1 Is a perspective view of an embodiment of the present utility model.

[0016] Figure 2 Is an embodiment of the present utility model Figure 1 The front view.

[0017] Figure 3 Is an embodiment of the present utility model Figure 2 Schematic diagram after the gear adjustment structure is adjusted to a higher level.

[0018] Figure 4 Is an embodiment of the present utility model Figure 2 Internal structure schematic diagram of the gear adjustment structure in.

[0019] Figure 5 For the embodiment of the present utility model Figure 4 Schematic structural diagram after the adjustment knob is pulled out.

[0020] In the figure: 1, foot; 2, footrest frame; 3, telescopic frame; 4, mounting frame; 11, mounting foot; 12, support foot; 20, gear adjustment mechanism; 21, adjustment slot; 22, adjustment knob; 23, adjustment column; 24, return bolt; 25, limit post; 26, limit cap; 27, limit slot; 111, first foot sleeve; 121, second foot sleeve; 122, mounting inclined surface; 123, roller. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Embodiment: As Figures 1-5A liftable learning chair footrest as shown, comprising paired bottom feet 1. A footrest 2 is fixed between adjacent bottom feet 1. The footrest 2 can support the feet and also connect the two bottom feet 1, making the stability of the whole product higher. The bottom foot 1 includes a mounting foot 11 inclined to the ground and a support foot 12 fixedly arranged on the side of the mounting foot 11 and propping on the ground. By inclining the mounting foot 11, the effect of oblique lifting is achieved, thus realizing the correction of sitting posture. By fixedly arranging the support foot 12 and the mounting foot 11, the stable support of the footrest is realized. The mounting foot 11 and the support foot 12 are combined to form an inverted V-shaped bottom foot 1. A first foot sleeve 111 is provided at the bottom of the mounting foot 11, and a second foot sleeve 121 is provided at the bottom of the support foot 12. An installation inclined surface 122 is provided at one end of the second foot sleeve 121 away from the first foot sleeve 111, and a roller 123 is provided on the installation inclined surface 122. Compared with directly setting wheels at the bottom of the footrest, the support is more stable and not easy to move. By setting it as an inverted V-shaped bottom foot 1, a triangle is formed at the bottom of the bottom foot 1, making the support more stable. The first foot sleeve 121 and the second foot sleeve 122 can be made of rubber or silicone material, so that the friction on the side in contact with the ground is greater, realizing stable placement. And at this time, the installation inclined surface 122 is not in contact with the ground, so the roller 123 is suspended above the ground at this time. When it is necessary to carry, lift one side of the mounting foot 11, so that the installation inclined surface 122 is parallel to the ground. At this time, the roller 123 is in contact with the ground, and the chair can be moved through the roller 123. While improving the stability of the footrest, it is also very convenient to perform displacement operations. The bottom of the mounting foot 11 abuts against the ground, and a telescopic frame 3 capable of multi-gear height adjustment is slidably provided at the top. A gear adjustment mechanism 20 for adjusting the height gear is provided between the mounting foot 11 and the telescopic frame 3. The gear adjustment mechanism 20 includes a plurality of equally spaced adjustment slots 21 axially opened along the inclined direction of the telescopic frame 3 and an adjustment knob 22 passing through the mounting foot 11 and helically limited with the adjustment slots 21, such as Figure 4 and Figure 5As shown, one end of the adjusting knob 22 extending into the adjusting groove 21 is provided with an adjusting post 23 extending into the adjusting groove 21. A return bolt 24 that elastically extends the adjusting post 23 into the adjusting groove 21 is sleeved outside the adjusting post 23. A limiting post 25 for preventing the return bolt 24 from coming off is provided at the top of the adjusting post 23. A polygonal limiting cap 26 is provided at one end of the return bolt 24 away from the limiting post 25. A limiting groove 27 with the same shape as the limiting cap 26 is provided on the adjusting knob 22 for the return bolt 24 to elastically return and extend into for limiting. By setting the limiting cap 26 to be polygonal, or it can also be a hexagonal nut, so that when the return bolt 24 returns, it can just cooperate with the limiting groove 27. The adjusting knob 22 drives the return bolt 24 through the cooperation of the limiting groove 27 and the limiting cap 26. At this time, the return bolt 24 can also be in threaded cooperation with the limiting groove 27 to achieve tight limiting. The diameter of the limiting post 25 is larger than the diameter of the middle through hole of the return bolt 24, so as to prevent the return bolt 24 from coming off the adjusting post 23. A mounting frame 4 parallel to the ground is fixedly provided on the side of the telescopic frame 3. The mounting frame 4 is L-shaped and arranged oppositely. Bolt holes can be provided above the mounting frame 4 for the seat to be fixedly arranged. The L-shaped end of the mounting frame 4 is parallel to the ground. Therefore, the seat is also parallel to the ground and there will be no tilting installation. The gear adjustment mechanism 20 enables the two telescopic frames 3 to be multi-gear obliquely lifted and lowered on the two mounting feet 11 and realizes the synchronous oblique lifting and lowering of the two mounting frames 4. When adjusting, simultaneously pull out the adjusting knob 22 by a certain distance as shown in Figure 5 shown, so that the adjusting post 23 leaves the adjusting groove 21. At this time, the height of the telescopic frame 3 can be adjusted. When the appropriate height is adjusted, after releasing the hand, as shown in Figure 4 shown, elastically extend the adjusting post 23 back into the adjusting groove 21 again. A tension spring or a spring can be provided between the return bolt 24 and the adjusting knob 22 so that the return bolt 24 can elastically return. In order to make the limiting between the adjusting knob and the adjusting groove closer, the adjusting knob also needs to be tightened. The thread on the outer peripheral surface of the return bolt 24 is matched with the adjusting groove 21 to achieve spiral limiting. Setting multiple adjusting grooves 21 at equal distances is also for more controllable height adjustment and more convenient adjustment.

[0023] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, 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 liftable study chair leg, comprising base feet (1) arranged in pairs, with a footrest (2) fixed between adjacent base feet (1), characterized in that: The base foot (1) comprises a mounting foot (11) arranged obliquely with the ground and a supporting foot (12) fixedly arranged on the side of the mounting foot (11) and supported on the ground; the bottom of the mounting foot (11) is against the ground, and the top is slidably and telescopically provided with a telescopic frame (3) capable of adjusting the height in multiple gears; a gear adjustment mechanism (20) for adjusting the height gear is provided between the mounting foot (11) and the telescopic frame (3); the gear adjustment mechanism (20) comprises a plurality of equally spaced adjustment slots (21) axially opened along the inclination direction of the telescopic frame (3) and a support member (21) passing through the mounting foot (11) and limiting the position of the adjustment slot (21). An adjusting knob (22) is provided at one end of the adjusting knob (22) extending into the adjusting groove (21) and having an adjusting column (23) extending into the adjusting groove (21). A return bolt (24) is provided on the outer sleeve of the adjusting column (23) so that the adjusting column (23) can elastically extend into the adjusting groove (21). The outer peripheral surface of the return bolt (24) is threadedly matched with the adjusting groove (21). A mounting frame (4) arranged parallel to the ground is fixedly provided on the side of the telescopic frame (3). The gear adjustment mechanism (20) enables the two telescopic frames (3) to be obliquely lifted and lowered in multiple gears on the two mounting feet (11) and realizes synchronous oblique lifting and lowering of the two mounting frames (4).

2. The liftable learning chair leg according to claim 1, characterized in that: The mounting foot (11) and the supporting foot (12) are combined to form an I-shaped foot (1); a first foot cover (111) is provided at the bottom of the mounting foot (11); a second foot cover (121) is provided at the bottom of the supporting foot (12); a mounting inclined surface (122) is provided at one end of the second foot cover (121) away from the first foot cover (111); and a roller (123) is provided on the mounting inclined surface (122).

3. The liftable learning chair leg according to claim 1, characterized in that: The mounting frames (4) are relatively arranged in an L-shape.

4. The liftable learning chair leg according to claim 1, characterized in that: A limiting column (25) having a diameter greater than that of the return bolt (24) is provided at the top of the adjusting column (23) so as to prevent the return bolt (24) from coming out; a polygonal limiting cap (26) is provided at one end of the return bolt (24) away from the limiting column (25); and a limiting groove (27) having the same shape as the limiting cap (26) is provided on the adjusting knob (22) for the return bolt (24) to extend into when elastically returning to a limit position.

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