CN213720945U - Office chair backrest capable of being adjusted forwards and backwards - Google Patents

Abstract

The utility model discloses an office chair back that can adjust from beginning to end, the test platform comprises a seat board, the top of bedplate is provided with the chair and leans on the body, and the equal fixedly connected with backup pad in top one end both ends of bedplate, the fixed frame of top fixedly connected with of backup pad, bottom one side intermediate position of fixed frame rotates through the bearing and is connected with the threaded rod, and the outer wall threaded connection of threaded rod has the sliding seat, the equal fixedly connected with U type seat in one side bottom that the body was leaned on to one side of sliding seat and chair, and rotate through the round pin axle between the both sides inner wall of U type seat and be connected with the pushing ram. The utility model discloses adjust the height of sliding seat on the threaded rod, adjust the chair and lean on the position of body on the bedplate for the sliding seat removes in the cross slot, can make whole office chair have the function of carrying out the front and back adjustment to the back, and can keep the stability ability that the chair leaned on the body.

Description

Office chair backrest capable of being adjusted forwards and backwards

Technical Field

The utility model relates to an office chair technical field especially relates to an office chair back that can adjust from beginning to end.

Background

The office chair refers to various chairs which are equipped for working conveniently in daily work and social activities. Office chairs are classified into a narrow office chair and a generalized office chair, the narrow office chair refers to a backrest chair on which a person sits when working on a desktop in a sitting posture, and the generalized office chair is all chairs used in offices and comprises a large office chair, a middle office chair, a guest-meeting chair, a staff chair, a conference chair, a visitor chair, a training chair and the like.

At present, when an existing office chair is used, the backrest of the existing office chair can only be adjusted in a steering mode, front and back adjustment cannot be achieved, and the use requirements of office staff cannot be met, so that the problem that the backrest of the existing office chair capable of being adjusted in the front and back mode needs to be designed urgently is solved.

Disclosure of Invention

The utility model aims at solving the defects existing in the prior art and providing the office chair backrest capable of being adjusted front and back.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an office chair back that can adjust from beginning to end, includes the bedplate, the top of bedplate is provided with the chair and leans on the body, and the equal fixedly connected with backup pad in top one end both ends of bedplate, the fixed frame of top fixedly connected with of backup pad, bottom one side intermediate position of fixed frame rotates through the bearing and is connected with the threaded rod, and the outer wall threaded connection of threaded rod has the sliding seat, the equal fixedly connected with U type seat in one side bottom that the body was leaned on to one side of sliding seat and chair, and rotates through the round pin axle between the both sides inner wall of U type seat and be connected with the propulsion pole.

Preferably, a transverse groove is formed in the middle of the top of the seat plate, a sliding seat is fixedly connected to the bottom of the seat backrest body, and the outer wall of the sliding seat is in sliding connection with the inner wall of the transverse groove.

Preferably, a through hole is formed in the middle of one end of the top of the seat plate, and a first rotating handle penetrating through the through hole is fixedly connected to the bottom of the threaded rod.

Preferably, one side of the chair backrest body is fixedly connected with a limiting plate, and the limiting plate is inserted in the fixed frame.

Preferably, the relative one side of backup pad has all been opened and has been erected the groove, and the equal fixedly connected with in both ends of sliding seat with erect inslot wall sliding connection's slide, the one end of sliding seat and the one end of fixed frame all bond and have the protection pad.

Preferably, the top of the chair backrest body is provided with a mounting groove, and the inner walls of two sides of the mounting groove are rotatably connected with a headrest through a damping rotating shaft.

Preferably, the both ends of bedplate have all been opened the spacing groove, and the chair leans on the fixedly connected with link between the both ends bottom of body, and the link is the U-shaped, and the link cup joints at the outer wall of bedplate, and threaded hole has all been opened at the both ends of link, and the equal threaded connection of the inner wall of screw hole has the screw thread nail of pegging graft at the spacing inslot, and the one end fixedly connected with second of screw thread nail changes the handle, the spacing tooth of other end fixedly connected with of screw thread nail.

The utility model has the advantages that:

1. through the bedplate that sets up, cross slot, sliding seat, chair lean on body, through-hole, first commentaries on classics handle, threaded rod, sliding seat, U type seat and push rod, utilize first commentaries on classics handle to drive the threaded rod and rotate, adjust the height of sliding seat on the threaded rod for the push rod is at U type seat internal rotation, thereby adjust the chair and lean on the position of body on the bedplate, make the sliding seat remove in the cross slot, thereby can make whole office chair have the function of carrying out the front and back adjustment to the back.

2. Lean on body, fixed frame, limiting plate and protection pad through the chair that sets up, when the chair leaned on the body to carry out the longitudinal adjustment, can make the limiting plate remove in fixed frame, keep the stability ability that the chair leaned on the body to utilize the protection pad to protect the one end of fixed frame and sliding seat and handle.

3. Through bedplate, spacing groove, link, screw hole, the second that sets up changeing handle, screw nail and spacing tooth, before the body is leaned on to the adjustment chair, adjustable screw nail is in the position of screw hole for spacing tooth does not contact with the inner wall of spacing groove, has adjusted the position of screw nail in the screw hole after the adjustment, makes spacing tooth and spacing groove contact, fully keeps the chair to lean on the fixity ability of body.

Drawings

Fig. 1 is a schematic overall structure diagram of an office chair back capable of being adjusted back and forth according to embodiment 1;

FIG. 2 is a front cross-sectional view of an office chair back that is adjustable in front and rear as set forth in example 1;

fig. 3 is a schematic structural view of a limiting groove and a connecting frame of an office chair back capable of being adjusted forward and backward according to embodiment 2.

In the figure: the chair comprises a seat plate 1, a transverse groove 2, a chair backrest body 3, a 4U-shaped seat, a first rotating handle 5, a supporting plate 6, a threaded rod 7, a protective pad 8, a fixed frame 9, a headrest 10, a limiting plate 11, a pushing rod 12, a vertical groove 13, a movable seat 14, a limiting groove 15, a connecting frame 16, a second rotating handle 17 and a threaded nail 18.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Example 1

Referring to fig. 1-2, an office chair backrest capable of being adjusted forwards and backwards comprises a seat plate 1, a chair backrest body 3 is arranged at the top of the seat plate 1, supporting plates 6 are welded at two ends of one end of the top of the seat plate 1, a fixing frame 9 is welded at the top of the supporting plates 6, a threaded rod 7 is rotatably connected to the middle position of one side of the bottom of the fixing frame 9 through a bearing, a movable seat 14 is in threaded connection with the outer wall of the threaded rod 7, a U-shaped seat 4 is connected to one side of the movable seat 14 and the bottom of one side of the chair backrest body 3 through bolts, and a push rod 12 is rotatably connected between the inner walls of two sides of the U-shaped seat 4 through a pin shaft.

Wherein, the top intermediate position of bedplate 1 is opened has horizontal groove 2, and the bottom of backrest body 3 has the sliding seat through bolted connection, sliding connection between the outer wall of sliding seat and the inner wall of horizontal groove 2.

Wherein, the middle position of the top one end of bedplate 1 is opened with the through-hole, and the welding of the bottom of threaded rod 7 has the first commentaries on classics handle 5 that passes the through-hole.

Wherein, one side of the chair backrest body 3 is connected with a limit plate 11 through a bolt, and the limit plate 11 is inserted in the fixing frame 9.

Wherein, the relative one side of backup pad 6 all opens has erect groove 13, and the both ends of sliding seat 14 all weld have with erect groove 13 inner wall sliding connection's slide, and the one end of sliding seat 14 and the one end of fixed frame 9 all bond and have protection pad 8.

Wherein, the top of the chair backrest body 3 is provided with a mounting groove, and the inner walls at the two sides of the mounting groove are rotatably connected with a headrest 10 through a damping rotating shaft.

The working principle is as follows: during the use, the user utilizes first commentaries on classics 5 to drive threaded rod 7 and rotates, adjust the height of sliding seat 14 on threaded rod 7, make propulsion pole 12 at the 4 internal rotations of U type seat, thereby adjust the position of chair back body 3 on bedplate 1, make the sliding seat remove in horizontal groove 2, thereby can make whole office chair have the function of carrying out the forward and backward adjustment to the back, when the chair back body 3 carries out the forward and backward adjustment, can make limiting plate 11 remove in fixed frame 9, keep the stability ability of chair back body 3, and utilize protection pad 8 to protect fixed frame 9 and the one end of sliding seat 14 and handle.

Example 2

Referring to fig. 3, but back of office chair of fore-and-aft adjustment, this embodiment compares in embodiment 1, spacing groove 15 has all been opened at the both ends of bedplate 1, and there is link 16 through bolted connection between the both ends bottom that the chair leaned on body 3, link 16 is the U-shaped, link 16 cup joints the outer wall at bedplate 1, threaded hole has all been opened at the both ends of link 16, the equal threaded connection of inner wall of threaded hole has screw 18 of pegging graft in spacing groove 15, the one end welding of screw 18 has the second to change 17, the other end welding of screw 18 has spacing tooth.

The working principle is as follows: before adjusting the chair back body 3, the position of the threaded nail 18 in the threaded hole can be adjusted, so that the limiting teeth are not in contact with the inner wall of the limiting groove 15, and after the adjustment is finished, the position of the threaded nail 18 in the threaded hole is adjusted, so that the limiting teeth are in contact with the limiting groove 15, and the fixing performance of the chair back body 3 is fully maintained.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (7)

1. The utility model provides an office chair back that can adjust from beginning to end, includes bedplate (1), its characterized in that, the top of bedplate (1) is provided with the chair and leans on body (3), and the equal fixedly connected with backup pad (6) in top one end both ends of bedplate (1), the fixed frame (9) of top fixedly connected with of backup pad (6), the bottom one side intermediate position of fixed frame (9) rotates through the bearing and is connected with threaded rod (7), and the outer wall threaded connection of threaded rod (7) has adjustable seat (14), the equal fixedly connected with U type seat (4) in one side of one side bottom that the body (3) was leaned on to one side of adjustable seat (14) and chair, and rotates through the round pin axle between the both sides inner wall of U type seat (4) and is connected with impulse lever (12).

2. The office chair back rest capable of being adjusted forwards and backwards according to claim 1, wherein a transverse groove (2) is formed in the middle position of the top of the seat plate (1), a sliding seat is fixedly connected to the bottom of the chair back body (3), and the outer wall of the sliding seat is in sliding connection with the inner wall of the transverse groove (2).

3. The back of an office chair capable of being adjusted forwards and backwards according to claim 2, wherein a through hole is formed in the middle of one end of the top of the seat plate (1), and a first rotating handle (5) penetrating through the through hole is fixedly connected to the bottom of the threaded rod (7).

4. The office chair back capable of being adjusted forwards and backwards according to claim 3, wherein a limiting plate (11) is fixedly connected to one side of the chair back body (3), and the limiting plate (11) is inserted into the fixing frame (9).

5. The office chair back rest capable of being adjusted forwards and backwards according to claim 4, wherein the opposite sides of the supporting plate (6) are provided with vertical grooves (13), two ends of the movable seat (14) are fixedly connected with sliding seats in sliding connection with the inner walls of the vertical grooves (13), and one end of the movable seat (14) and one end of the fixed frame (9) are respectively bonded with a protective pad (8).

6. The office chair back capable of being adjusted forwards and backwards according to any one of claims 1 to 5, characterized in that the top of the chair back body (3) is provided with a mounting groove, and the inner walls of the two sides of the mounting groove are rotatably connected with a headrest (10) through a damping rotating shaft.

7. The office chair back capable of being adjusted forwards and backwards according to claim 1, wherein limiting grooves (15) are formed in two ends of the seat plate (1), connecting frames (16) are fixedly connected between bottoms of two ends of the chair back body (3), the connecting frames (16) are U-shaped, the connecting frames (16) are sleeved on the outer wall of the seat plate (1), threaded holes are formed in two ends of the connecting frames (16), threaded nails (18) inserted into the limiting grooves (15) are connected to inner walls of the threaded holes in a threaded mode, a second rotating handle (17) is fixedly connected to one ends of the threaded nails (18), and limiting teeth are fixedly connected to the other ends of the threaded nails (18).

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