CN210095179U

CN210095179U - Mounting structure of chair chassis buffer spring

Info

Publication number: CN210095179U
Application number: CN201920271076.6U
Authority: CN
Inventors: 梁景流
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-04
Filing date: 2019-03-04
Publication date: 2020-02-21
Anticipated expiration: 2029-03-04

Abstract

The utility model provides a chair chassis buffer spring's mounting structure which characterized in that: the chair comprises a fixed seat connected with chair legs and a chassis frame connected with a seat plate, wherein a swing frame is arranged between the chassis frame and the fixed seat and connected with a chair back, the swing frame is hinged with the fixed seat through a first pin shaft, the swing frame is hinged with the chassis frame through a second pin shaft, and the swing frame swings relative to the fixed seat and the chassis frame through the first pin shaft and the second pin shaft; a buffer spring is arranged between the swing frame and the fixed seat and pushes one end of the swing frame, which is provided with the chair back, to tilt upwards all the time. The utility model has the advantages that: the back of the chair adopts elastic support, and the user can utilize buffer spring buffering with the impact force after the back of the chair is atress when taking to reduce the impact force to stop part, when extension chair life, improve the riding comfort.

Description

Mounting structure of chair chassis buffer spring

Technical Field

The utility model relates to a furniture hardware fitting specifically is a chair chassis buffer spring's mounting structure.

Background

At present, office chairs are generally divided into two types of chair back fixing and chair back adjusting, and chairs with fixed chair backs are easy to cause back fatigue after long-term use due to the fact that the chair backs of the chairs are not adjustable, so that certain compression is caused to human spines, and the disease probability of spondylopathy is increased; the chair with the adjustable chair back mainly achieves the purpose of adjusting by locking and adjusting the angle of the chair back in sections, but the adjustment step is complicated, so that the purpose of adjusting the chair back cannot be rapidly achieved. Meanwhile, once the chair back is locked, the chair back is in a rigid support when a user sits on the chair, so that the whole fixing structure is impacted greatly, related parts are easy to damage in serious cases, and the service life of the chair is influenced, and further improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcomings of the prior art, and providing a mounting structure of a chair chassis buffer spring, which has simple structure and good stress of the spring, and is beneficial to improving the riding comfort and the service life of the chair.

The utility model discloses the purpose is realized with following mode: the utility model provides a chair chassis buffer spring's mounting structure which characterized in that: the chair comprises a fixed seat connected with chair legs and a chassis frame connected with a seat plate, wherein a swing frame is arranged between the chassis frame and the fixed seat and connected with a chair back, the swing frame is hinged with the fixed seat through a first pin shaft, the swing frame is hinged with the chassis frame through a second pin shaft, and the swing frame swings relative to the fixed seat and the chassis frame through the first pin shaft and the second pin shaft; a buffer spring is arranged between the swing frame and the fixed seat and pushes one end of the swing frame, which is provided with the chair back, to tilt upwards all the time; the buffer spring is vertically installed, a pressing cap is arranged at the top end of the buffer spring and is abutted against and pressed on a cross beam of the swing frame, a tray is arranged at the bottom of the buffer spring, and the bottom of the tray is abutted against and pressed on the fixed seat.

The fixing seat is further connected with an adjusting screw in a threaded mode, one end of the adjusting screw extends into an adjusting hole in the tray, and the adjusting screw is rotated to drive the tray to move along the axis of the buffer spring.

And a positioning ball is also arranged in the adjusting hole, and the adjusting screw is pressed against the positioning ball.

The swing frame is provided with a plurality of stages of positioning holes, a locking pin positioned in the fixed seat is inserted into the positioning holes under the driving of the power mechanism, and the relative angle between the swing frame and the fixed seat is locked.

The power mechanism comprises a guide sleeve arranged in the fixed seat, a first guide hole is formed in the guide sleeve, and the locking pin is arranged in the first guide hole in a sliding manner; still install the promotion cover at the uide bushing tail end including slidingtype, be provided with the second guiding hole in the promotion cover, the locking round pin is put into in this second guiding hole, the tail end of promotion cover is installed and is promoted the round pin, it is articulated with actuating arm one end to promote the round pin, the actuating arm other end is articulated with the fixing base, it has the connecting rod still to articulate on the actuating arm, the actuating lever passes through the connecting rod and is articulated with the actuating arm, it can drive the actuating arm swing through the connecting rod to rotate the actuating arm, the drive is promoted and is moved in.

The surface of the locking pin is sleeved with a spring, one end of the spring is pressed on the locking pin, the other end of the spring is pressed in the guide sleeve, and the spring generates thrust to move the locking pin towards the pushing pin direction all the time.

The driving rod can be rotatably installed on the fixing seat, one end of the driving cylinder is provided with a handle, the other end of the driving cylinder is provided with a driving plate, and the connecting rod is hinged to be installed on the driving plate.

The utility model has the advantages that: 1. simple structure, low production cost and improved market competitiveness. 2. The back of the chair adopts elastic support, and the user can utilize buffer spring buffering with the impact force after the back of the chair is atress when taking to reduce the impact force to stop part, when extension chair life, improve the riding comfort. 3. The buffer spring is a spiral spring, is vertically installed and is consistent with the swinging direction of the swing frame, so that the buffer spring has the advantage of uniform and stable stress. 4. The multi-gear adjustment is realized, more use angles are provided for users to select, and therefore the use requirements of people with more body types are met. 5. A buffer spring is arranged between the swing frame and the fixed seat and pushes one end of the swing frame, which is provided with the chair back, to tilt upwards all the time, so that the chair back can automatically reset when being adjusted, and a user can push the chair back backwards to reach the optimal use angle by using the back.

Drawings

Fig. 1 is a diagram of the use effect of the final assembly of the utility model.

Fig. 2 and 3 are schematic structural diagrams of the present invention.

Fig. 4 is a schematic view of the rear structure of the hidden chassis frame of the present invention.

Fig. 5 is a sectional view of the structure of the present invention.

Fig. 6 is an enlarged view of the structure of the part a in fig. 5 of the present invention.

Fig. 7 is a schematic structural view of the middle power mechanism of the present invention.

Fig. 8 and 9 are structural assembly drawings of the present invention.

Fig. 10 is a sectional view of the structure of the middle buffer spring of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The utility model provides a chair chassis buffer spring's mounting structure which characterized in that: the chair comprises a fixed seat 2 connected with chair legs 1 and a chassis frame 4 connected with a seat plate 3, wherein a swing frame 5 is arranged between the chassis frame 4 and the fixed seat 2, the swing frame 5 is connected with a chair back 6, the swing frame 5 is hinged with the fixed seat 2 through a first pin shaft 51, the swing frame 5 is hinged with the chassis frame 4 through a second pin shaft 52, and the swing frame 5 swings relative to the fixed seat 2 and the chassis frame 4 through the first pin shaft 51 and the second pin shaft 52; a buffer spring 9 is also arranged between the swing frame 5 and the fixed seat 2, and the buffer spring 9 pushes one end of the swing frame 5, which is mounted on the chair back 6, to tilt upwards all the time; the buffer spring 9 is vertically installed, a pressing cap 91 is arranged at the top end of the buffer spring to abut against a cross beam 92 of the swing frame, a tray 93 is arranged at the bottom of the buffer spring, and the bottom of the tray 93 abuts against the fixed seat 2.

The fixed seat 2 is further screwed with an adjusting screw 94, one end of the adjusting screw 94 extends into an adjusting hole 95 in the tray 93, and the adjusting screw 94 is rotated to drive the tray 93 to move along the axis of the buffer spring 9.

The adjusting hole 95 is also provided with a positioning ball 96, and the adjusting screw 94 is pressed against the positioning ball 96.

The swing frame 5 is provided with a plurality of stages of positioning holes 7, a locking pin 8 positioned in the fixed seat 2 is driven by the power mechanism to be inserted into the positioning holes 7, and the relative angle between the swing frame 5 and the fixed seat 2 is locked.

The power mechanism comprises a guide sleeve 10 arranged in the fixed seat 2, a first guide hole 11 is arranged in the guide sleeve 10, and the locking pin 8 is slidably arranged in the first guide hole 11; still include the promotion cover 12 of slidingtype installation at uide bushing 10 tail end, be provided with second guiding hole 13 in the promotion cover 12, this second guiding hole 13 is put into to locking pin 8, promotion 14 is installed to the tail end of promotion cover 12, promotion 14 is articulated with actuating arm 15 one end, the actuating arm 15 other end is articulated with fixing base 2, still articulated on the actuating arm 15 have a connecting rod 16, actuating lever 17 is articulated with actuating arm 15 through connecting rod 16, it can drive actuating arm 15 swing through connecting rod 16 to rotate actuating arm 15, drive promotion 14 moves in second guiding hole 13, thereby drive locking pin 8 motion.

The surface of the locking pin 8 is sleeved with a spring 19, one end of the spring 19 is pressed against the locking pin 8, the other end of the spring 19 is pressed in the guide sleeve 10, and the spring 19 generates thrust to move the locking pin 8 towards the push pin 14.

The driving rod 17 is rotatably mounted on the fixed seat 2, one end of the driving cylinder is provided with a handle 171, the other end of the driving cylinder is provided with a driving plate 172, and the connecting rod 16 is hinged on the driving plate 172.

The working principle is as follows: in the scheme, a chair leg 1 is connected with a fixed seat 2, a seat plate 3 is connected with a chassis frame 4, a swing frame 5 is arranged between the chassis frame 4 and the fixed seat 2, the swing frame 5 is connected with a chair back 6, the swing frame 5 is hinged with the fixed seat 2 through a first pin shaft 51, the swing frame 5 is hinged with the chassis frame 4 through a second pin shaft 52, and the swing frame 5 swings relative to the fixed seat 2 and the chassis frame 4 through the first pin shaft 51 and the second pin shaft 52; therefore, when the chair is used, the swing frame can swing for a certain angle around the first pin shaft and the second pin shaft, so that the relative angle between the chair back and the seat plate can be adjusted within a certain range, the chair is suitable for people with different body types and riding habits, and the riding comfort of the chair is improved.

Further: because a buffer spring 9 is also arranged between the rocking frame 5 and the fixed seat 2, the buffer spring 9 pushes one end of the rocking frame 5, which is provided with the chair back 6, to tilt upwards all the time. When a user sits and the back of the chair tilts backwards when contacting with the chair back, the buffer spring can play a role in elastically supporting the chair back, so that the user is more comfortable when sitting. Meanwhile, in order to adapt to the use habits of different users, the force of the buffer spring in the scheme can be adjusted. During adjustment, the tray 93 is driven to move along the axis of the buffer spring 9 only by rotating the adjusting screw 94. When the elasticity is stronger, the adjusting screw is rotated, so that the adjusting screw compresses the buffer spring, the elasticity of the chair back is stronger, and the effect of stronger supporting force is achieved. When the elasticity is weak, the adjusting screw is rotated, so that the adjusting screw can loosen the buffer spring. In order to avoid noise generated by friction between the tray and the adjusting screw during the compression process of the spring, a positioning ball 96 is further installed in the positioning hole 95, and the adjusting screw 94 abuts against the positioning ball 96. The positioning column can effectively reduce the contact area between the adjusting screw and the tray, and reduce the friction surface, so that a user can not generate noise in the use process. Wherein, it is required to be noted that: the buffer spring in the present case adopts coil spring, and is vertical installation between rocking frame and fixing base, and its direction of force of the spring of vertical installation is unanimous with the direction of motion of rocking frame, and consequently the area of bearing between buffer spring and rocking frame and base is big, and the stress structure is reliable and stable to be favorable to increasing the stability of this structure.

Further: in order to lock the relative position between the chair back and the seat plate, a plurality of stages of positioning holes 7 are formed in the swing frame 5, and the locking pin 8 positioned in the fixed seat 2 is driven by the power mechanism to be inserted into the positioning holes 7. When the user needs to adjust again, the driving rod 17 is rotated, the driving plate 172 on the driving rod 17 swings, the driving plate 172 utilizes the connecting rod 16 to pull the driving arm 15 to swing, and the driving push pin 14 moves in the second guiding hole 13 when the driving arm 15 swings, so that the locking pin 8 is driven to move. Therefore, the driving rod can be rotated to drive the locking pin to be separated from or butted with the positioning hole, after the locking pin is separated from the positioning hole, the chair back moves forwards under the action of the buffer spring 9 to be in a reset state, at the moment, a user can utilize the back to push the chair back backwards, and when the chair reaches a proper gear, the driving rod is pulled to push the locking pin to be inserted into the corresponding positioning hole. When readjustment is needed, the operation is repeated. Therefore, compared with the prior art, the chair back angle in the scheme can be freely adjusted to meet the use habits of different users, meanwhile, the operation mode is simple and quick, the adjustment convenience is improved, the use texture of the users is improved, and the chair back angle adjusting device can be widely popularized and used.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a chair chassis buffer spring's mounting structure which characterized in that: the chair comprises a fixed seat (2) connected with chair legs (1) and a chassis frame (4) connected with a seat plate (3), wherein a swing frame (5) is arranged between the chassis frame (4) and the fixed seat (2), the swing frame (5) is connected with a chair back (6), the swing frame (5) is hinged with the fixed seat (2) through a first pin shaft (51), the swing frame (5) is hinged with the chassis frame (4) through a second pin shaft (52), and the swing frame (5) swings relative to the fixed seat (2) and the chassis frame (4) through the first pin shaft (51) and the second pin shaft (52); a buffer spring (9) is also arranged between the swing frame (5) and the fixed seat (2), and the buffer spring (9) pushes one end of the swing frame (5) which is provided with the chair back (6) to tilt upwards all the time; the buffer spring (9) is vertically installed, a pressing cap (91) is arranged at the top end of the buffer spring and is pressed against a cross beam (92) of the swing frame, a tray (93) is arranged at the bottom of the buffer spring, and the bottom of the tray (93) is pressed against the fixed seat (2).

2. The mounting structure of a cushion spring of a chair chassis according to claim 1, wherein: the fixing seat (2) is further connected with an adjusting screw (94) in a threaded mode, one end of the adjusting screw (94) extends into an adjusting hole (95) in the tray (93), and the adjusting screw (94) is rotated to drive the tray (93) to move along the axis of the buffer spring (9).

3. The mounting structure of a cushion spring of a chair chassis according to claim 2, wherein: and a positioning ball (96) is also arranged in the adjusting hole (95), and the adjusting screw (94) is pressed against the positioning ball (96).

4. The mounting structure of a cushion spring of a chair chassis according to claim 1, wherein: the swing frame (5) is provided with a plurality of stages of positioning holes (7), a locking pin (8) positioned in the fixing seat (2) is driven by the power mechanism to be inserted into the positioning holes (7), and the relative angle between the swing frame (5) and the fixing seat (2) is locked.

5. The mounting structure of a cushion spring of a chair chassis according to claim 4, wherein: the power mechanism comprises a guide sleeve (10) arranged in the fixed seat (2), a first guide hole (11) is formed in the guide sleeve (10), and the locking pin (8) is arranged in the first guide hole (11) in a sliding manner; still install promotion cover (12) at uide bushing (10) tail end including slidingtype, be provided with second guiding hole (13) in promotion cover (12), stop pin (8) are put into this second guiding hole (13), promote the tail end of cover (12) and install promotion round pin (14), promotion round pin (14) are articulated with actuating arm (15) one end, the actuating arm (15) other end is articulated with fixing base (2), it has connecting rod (16) still to articulate on actuating arm (15), actuating lever (17) are articulated with actuating arm (15) through connecting rod (16), it can drive actuating arm (15) swing through connecting rod (16) to rotate actuating arm (15), drive promotion round pin (14) are at second guiding hole (13) internal motion, thereby drive stop pin (8) motion.

6. The mounting structure of a cushion spring of a chair chassis according to claim 5, wherein: the surface of the locking pin (8) is sleeved with a spring (19), one end of the spring (19) is pressed against the locking pin (8), the other end of the spring (19) is pressed against the guide sleeve (10), and the spring (19) generates thrust to move the locking pin (8) towards the pushing pin (14) all the time.

7. The mounting structure of a cushion spring of a chair chassis according to claim 5, wherein: the driving rod (17) is rotatably arranged on the fixed seat (2), one end of the driving cylinder is provided with a handle (171), the other end of the driving cylinder is provided with a driving plate (172), and the connecting rod (16) is hinged on the driving plate (172).