CN212088872U - Spring hardness adjusting device for office chair - Google Patents

Abstract

The utility model discloses a spring hardness adjusting device for official working seat, the engine base plate comprises a seat plate, rotate on the bedplate and install the back, the back rotates the position of being connected with the bedplate and is provided with the torsional spring, and this torsional spring is exerted towards bedplate front end pivoted power to the back, and movable mounting has the subassembly of controlling of traction element and being used for controlling the traction element motion on the bedplate, the torsional spring has first linking portion and second linking portion, and wherein first linking portion supports on the back, and second linking portion supports on the traction element. The utility model has the advantages that: the traction component can be controlled to move back and forth in a manual or electric mode to change the hardness of the torsion spring, so that the use requirements of wider users are met.

Description

Spring hardness adjusting device for office chair

Technical Field

The utility model belongs to the technical field of the official working seat, concretely relates to spring hardness adjusting device for official working seat.

Background

The office chair is office furniture, and for office workers, most of the working days are occupied by the office chair, and the office chair with reasonable structural design and good comfort has positive significance for relieving fatigue of long-time sitting.

For promoting the seat travelling comfort, a seat that the back has a resistance has appeared in the market, the position that back and bedplate rotate to be connected is provided with the spring promptly, and the user sits back on the seat, and human back can promote the back and topple over backward, and the spring can provide a buffering at this in-process, and the travelling comfort is better, stops application of force back then automatic kick-backs to initial position.

When a user experiences the seat with the functions, the hardness of some springs is too soft, and the hardness of some springs is too hard, but in the prior art, the springs for supporting the backrest to tilt backwards cannot be adjusted in hardness, the hardness of the springs is consistent after the product leaves a factory, and the requirements of all users cannot be met.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a spring hardness adjusting device for office chair to solve the technical defect that spring hardness can not be adjusted among the prior art.

In order to achieve the above purpose, the utility model discloses technical scheme as follows:

the utility model provides a spring hardness adjusting device for office chair, includes the bedplate, rotate on the bedplate and install the back, the back is provided with the torsional spring with the position that the bedplate rotates to be connected, and this torsional spring is applied to the back towards bedplate front end pivoted power, and its key lies in: the seat board is movably provided with a traction part and a control assembly used for controlling the traction part to move, and the torsion spring is provided with a first hanging part and a second hanging part, wherein the first hanging part is supported on the backrest, and the second hanging part is supported on the traction part.

By adopting the structure, the traction component is controlled by the control assembly to move back and forth relative to the seat plate, so that the hardness of the torsion spring can be adjusted, and the requirements of more extensive users can be met.

Preferably, the method comprises the following steps: the middle part downside of bedplate is equipped with two sets of downwardly extending's adapter, and the back lower extreme is equipped with the installation department of extending towards the adapter direction, and the installation department rotates respectively through two pivots and installs two sets of on the adapter. By adopting the structure, the backrest and the seat board can be assembled conveniently in a rotating way, the rotating connection position can be positioned at the lower side of the middle part of the seat board, and the overall balance of the seat can be improved after the back of a human body is inclined.

Preferably, the method comprises the following steps: the number of the torsion springs is two, and the torsion springs are sleeved on the two rotating shafts respectively. By adopting the structure, the assembly is convenient.

Preferably, the method comprises the following steps: the outer sides of the two sets of adapter seats are provided with arc-shaped holes, and two ends of the traction part are slidably mounted in the arc-shaped holes. By adopting the structure, the tension of the traction part on the torsion spring can be ensured to be always parallel to the torsion steering of the torsion spring, so that the hardness adjustment is more labor-saving.

Preferably, the method comprises the following steps: the control assembly comprises a middle part and a gear box fixedly arranged on the lower side of the seat plate, a turbine and a worm are arranged in the gear box and are meshed with each other, a traction shaft is fixedly sleeved on the turbine and is in threaded sleeve joint with the middle part, the traction part is hung on the middle part, and a control handle extending out of the end part of the seat plate is arranged at the outer end of the worm. By adopting the structure, the pulling component is controlled to move back and forth, and the hardness of the torsion spring can be adjusted, so that the rotation resistance of the backrest is adjusted, and the wider use requirements of users are met.

Preferably, the method comprises the following steps: the traction part comprises an integrally formed hanging part and connecting rods arranged at two ends of the hanging part, wherein the connecting rods are slidably mounted in the arc holes, the hanging part protrudes forwards relative to the connecting rods, and the middle part is provided with an arc hanging groove matched with the hanging part. By adopting the structure, the assembly is convenient.

Preferably, the method comprises the following steps: the control handle is driven in a manual or electric mode.

Compared with the prior art, the beneficial effects of the utility model are that:

adopt the utility model provides a spring hardness adjusting device for official working seat according to different user demands, can adopt manual or electric mode control traction part back-and-forth movement to change the hardness of torsional spring, thereby satisfy more extensive user's user demand.

Drawings

FIG. 1 is a schematic view of an office chair;

FIG. 2 is a view showing an assembly structure of the underside of the seat plate;

FIG. 3 is a schematic structural view of a torsion spring;

FIG. 4 is a schematic view of the seat plate (underside up);

FIG. 5 is a schematic view of the traction element configuration;

fig. 6 is a schematic view of the steering assembly (with the gearbox housing hidden).

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

As shown in fig. 1 and 2, a spring rate adjusting apparatus for an office chair is constructed in such a manner that: rotate on the bedplate 1 and install back 2, the middle part downside of bedplate 1 is equipped with two sets of downwardly extending's adapter 1a, the lower extreme of back 2 is equipped with the installation department 2a that extends towards adapter 1a direction, installation department 2a articulates respectively on two sets of adapters 1a through two pivot 2b, all the cover is equipped with torsional spring 3 on two pivot 2b, the resistance that torsional spring 3 can be overcome at the back when the user sits promotes back 2 and emptys backward, the travelling comfort is better.

As shown in fig. 3 to 6, a traction member 4 and a control assembly 5 for controlling the movement of the traction member 4 are movably mounted on the seat plate 1, the torsion spring 3 has a first hanging part 3a and a second hanging part 3b, wherein the first hanging part 3a is supported on the mounting part 2a, the second hanging part 3b is supported on the traction member 4, the outer sides of the two sets of adapter seats 1a are respectively provided with an arc hole 1b, the traction member 4 includes an integrally formed hanging part 4a and connecting rods 4b arranged at two ends of the hanging part 4a, the connecting rods 4b are slidably mounted in the arc holes 1b, the control assembly 5 includes an intermediate part 5c and a gear box 5a fixedly arranged at the lower side of the seat plate 1, a turbine 5a1 and a worm 5a2 which are engaged with each other are arranged in the gear box 5a1, wherein a traction shaft 5b is fixedly sleeved on the turbine 5a1, the traction shaft 5b is in threaded connection with the intermediate, the middle part 5c is provided with an arc hanging groove 5c1, the hanging part 4a of the traction part 4 is hung on the arc hanging groove 5c1, and the outer end of the worm 5a2 is provided with a control handle 5d extending out of the end part of the seat board 1.

Can adopt manual or motor drive's mode to let brake valve lever 5d rotate, brake valve lever 5d drives worm 5a2 and rotates, worm 5a2 drives turbine 5a1 and rotates, because middle part 5c cup joints with the screw thread of traction shaft 5b, so when traction shaft 5b and turbine 5a1 synchronous revolution, can drive middle part 5c and remove along traction shaft 5b length direction, thereby pulling traction part 4 back-and-forth movement in arc hole 1b, traction part 4b drives torsion spring 3's second department of hanging 3b again and rotates, thereby realize torsion spring 3 hardness adjustment.

As shown in fig. 5, to prevent the movement interference, the hanging part 4a protrudes forward relative to the connecting rod 4b, i.e. the hanging part 4a is not coaxial with the connecting rod 4b, when the middle part 5c pulls the traction part 4 to move, the hanging part 4a of the traction part 4 will rotate in the arc hanging groove 5c1 to ensure the connecting rod 4b to move effectively in the arc hole 1 b.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.

Claims (7)

1. The utility model provides a spring hardness adjusting device for office chair, includes bedplate (1), rotate on bedplate (1) and install back (2), back (2) are provided with torsional spring (3) with position that bedplate (1) rotate to be connected, its characterized in that: the seat plate (1) is movably provided with a traction part (4) and a control assembly (5) for controlling the traction part (4) to move, the torsion spring (3) is provided with a first hanging part (3a) and a second hanging part (3b), wherein the first hanging part (3a) is supported on the backrest (2), and the second hanging part (3b) is supported on the traction part (4).

2. The spring rate adjustment device for an office chair according to claim 1, wherein: the middle part downside of bedplate (1) is equipped with two sets of downwardly extending's adapter (1a), and back (2) lower extreme is equipped with installation department (2a) towards adapter (1a) direction extension, and installation department (2a) rotate respectively through two pivot (2b) and install two sets of on adapter (1 a).

3. The spring rate adjustment device for an office chair according to claim 2, wherein: the number of the torsion springs (3) is two, and the torsion springs are sleeved on the two rotating shafts (2b) respectively.

4. The spring rate adjustment device for an office chair according to claim 3, wherein: the outer sides of the two sets of adapter seats (1a) are provided with arc-shaped holes (1b), and the two ends of the traction part (4) are slidably arranged in the arc-shaped holes (1 b).

5. The spring rate adjustment device for an office chair according to claim 4, wherein: the control assembly (5) comprises a middle component (5c) and a gear box (5a) fixedly arranged on the lower side of the seat plate (1), a turbine (5a1) and a worm (5a2) which are meshed with each other are arranged in the gear box (5a), a traction shaft (5b) is fixedly sleeved on the turbine (5a1), the traction shaft (5b) is in threaded sleeve connection with the middle component (5c), the traction component (4) is hung on the middle component (5c), and a control handle (5d) extending out of the end portion of the seat plate (1) is arranged at the outer end of the worm (5a 2).

6. The spring rate adjustment device for an office chair according to claim 5, wherein: traction element (4) include integrated into one piece hang dress portion (4a) and set up connecting rod (4b) at hang dress portion (4a) both ends, wherein connecting rod (4b) slidable mounting in arc hole (1b), hang dress portion (4a) for connecting rod (4b) protrusion forward, be equipped with on intermediate member (5c) and hang groove (5c1) with the arc that dress portion (4a) suited.

7. The spring rate adjustment device for an office chair according to claim 5, wherein: the control handle (5d) is driven in a manual or electric mode.

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