CN102846067A

CN102846067A - Back locking mechanism for swivel chair

Info

Publication number: CN102846067A
Application number: CN2012103467670A
Authority: CN
Inventors: 阮正富; 何基; 吴晓欣
Original assignee: Zhejiang Yongyi Furniture Co Ltd
Current assignee: UE Furniture Co Ltd
Priority date: 2012-09-18
Filing date: 2012-09-18
Publication date: 2013-01-02
Anticipated expiration: 2032-09-18
Also published as: CN102846067B

Abstract

The invention discloses a back locking mechanism for a swivel chair. The back locking mechanism for the swivel chair comprises a positioning seat. The rear end of the positioning seat is fixedly connected with a back bracket connected with a back. A plurality of clamping grooves are arranged at the front of the positioning seat from top to bottom. A pin fitting with the clamping grooves of the positioning seat is slidably arranged on a bottom plate of a chassis. A pin positioning plate preventing the pin from tilting up is arranged at the upper end of the pin. The pin positioning plate is fixedly connected with the bottom plate. A pin sliding control device is connected with the pin. The back locking mechanism comprises the positioning seat fixedly connected with the back bracket, the clamping grooves are arranged at the front end of the positioning seat from top to bottom, the pin fitting with the clamping grooves of the positioning seat is disposed on the bottom plate of the chassis, and the back can be locked and unlocked conveniently by inserting the pin into or separating the pin from the clamping grooves.

Description

A kind of backrest of rotary chair locking mechanism

Technical field

The present invention relates to a kind of swivel chair, particularly a kind of backrest of rotary chair locking mechanism.

Background technology

Revolving chair chassis also claims Revolving chair tray, is a vitals that is contained in swivel chair seat cushion below, the lifting of seat cushion, and the elevation angle of backrest is regulated and is all relied on the chassis to finish.

Present Revolving chair tray generally is comprised of parts such as top tray, lower joist, rotating shaft and spring assemblies, and after top rotary table and swivel chair seat back were fixing, swivel chair can be done suitable reclining around the shaft, and can initiatively reply, and makes the user that comfort be arranged.For example, Chinese patent discloses a kind of pallet, and (patent No. is: 02287885.8), mainly comprise base plate, sliding seat, conical pipe and adjusting device, sliding seat is movably connected in base plate, in the middle of sliding seat, connect the conical pipe of air pressure rod, be welded on together on the sliding seat by Taper Pipe fixed head and conical pipe; Described adjusting device includes adjusting rod, adjustable plate, torsion spring, torsion spring fixed head, and adjusting rod interts in sliding seat, and adjustable plate is fixedly connected on adjusting rod and inserts on the interior end of sliding seat, the one side contact air pressure rod of adjustable plate, and another side is connected with torsion spring; Be provided with adjustable plate at the another side of adjustable plate and end blade.

The adjusting device of above-mentioned Revolving chair tray is regulated by torque spring fully, and for the different people of body weight, the power of needed torque spring needs different, makes product not have good versatility.Be sitting on the seat that this Revolving chair tray is housed as the user, when directly sitting on backward reclining, the position of seat lumbar support human body can be offset, and affects comfortableness.

A kind of Revolving chair chassis of special research and development design, comprise the base plate that links to each other with the gas bar, the left and right sides at base plate vertically respectively is provided with a gripper shoe, gripper shoe and base plate are fixedly linked, along continuous straight runs is provided with to install the seat board of seat support above two gripper shoes, the both sides, front and back of base plate are respectively equipped with to bracing frame and the backrest bracket of the inclination of swivel chair the place ahead, bracing frame, the bottom of backrest bracket and two gripper shoes are hinged, backrest bracket respectively is provided with up and down a bearing pin, bearing pin is plugged on the side plate of the backrest bracket left and right sides, the both sides, front and back of seat board respectively with bracing frame, the top of backrest bracket is hinged, and backrest bracket is connected with the elasticity reset device that it is tilted to swivel chair the place ahead.When the people is sitting in the process of leaning on backward on the chair, seat support, seat board are also followed the rotation of backrest bracket, backrest and are moved backward, backrest bracket can drive the seat board interlock, make fit all the time correspondence position of human body back of back rest supports, backrest keeps relative fixing with people's back, has avoided clothing and back to produce friction.

But the somebody wishes that backrest lock is fixed on one identifies oneself comfortable position, to take a nap after lunch or to have a rest for a long time, so need a kind of backrest locking mechanism of design to solve this problem.

Summary of the invention

The present invention has overcome existing deficiency in the above-mentioned prior art, and providing a kind of can advance line-locked backrest locking mechanism to backrest of rotary chair, thereby backrest lock can be fixed on a fixing angle.

Technical scheme of the present invention is achieved in that

A kind of backrest of rotary chair locking mechanism, comprise positioning seat, the rear end of positioning seat is fixedly linked with the backrest bracket that is connected backrest, the front end of positioning seat offers many clamp bar slots from top to bottom, base plate on the chassis slides and is provided with the latch that matches with the draw-in groove of positioning seat, the latch upper end is provided with the latch location-plate that prevents the latch perk, and latch location-plate and base plate are fixedly linked, and latch is connected with the latch slide control device.

As preferably, the rear end of positioning seat is provided with locating shaft, locating shaft is arranged between up and down two bearing pins of backrest bracket, the bearing pin of locating shaft and backrest bracket lower end all is located on the positioning seat, gripper shoe on the chassis offers limit sliding chutes, and the two ends of locating shaft are passed the side plate of the backrest bracket left and right sides and are plugged in the limit sliding chutes.The bearing pin of locating shaft and backrest bracket lower end is located on the positioning seat, thereby makes positioning seat and backrest bracket keep relatively-stationary state.

As preferably, described latch slide control device comprises handle, torque spring, handle is L shaped, handle is to be connected to form by two sections of handle and drive links, handle passes one of them gripper shoe and is exposed to outside the chassis, drive link is connected to leader's rotating shaft locating piece near this end movable sleeve of handle, and handle rotating shaft locating piece is installed on the base plate by a screw, and handle rotating shaft locating piece rotates around screw; Torque spring is socketed on the torsion spring set screw, the torsion spring set screw is installed in screw fixed block upper end, screw fixed block lower end and base plate are fixedly linked, the first spring arm of torque spring is plugged in the hole of latch rear end, and the second spring arm of torque spring is plugged in the hole of drive link away from this end of handle; Handle is stirred in front and back, and handle integral body is rotated around screw, drives torque spring and rotates, and under the elastic force effect of torque spring, the release of the first spring arm pulling latch, retraction are to realize locking, the release of latch.

For latch being controlled in the rational travel range, as preferably, on base plate, also be fixed with limited block, limited block is on the position of drive link away from this end of handle, have spacing runway at limited block, this end away from handle on the drive link is inserted in the spacing runway.

Adopted principle of the present invention and the beneficial effect of technique scheme to be:

Backrest locking of the present invention comprises the positioning seat that is fixedly linked with backrest bracket, the front end of positioning seat offers many clamp bar slots from top to bottom, base plate on the chassis slides and is provided with the latch that matches with the draw-in groove of positioning seat, realize locking, release to backrest by the insertion of control latch, disengaging draw-in groove, very convenient.

Description of drawings

Fig. 1 is structural representation of the present invention;

Fig. 2 is the syndeton schematic diagram on the present invention and chassis.

The specific embodiment

The specific embodiment of the present invention is as follows:

Embodiment: such as Fig. 1, shown in 2, backrest bracket locking mechanism of the present invention comprises positioning seat 13 and is arranged on the locating shaft 14 of positioning seat 13 rear ends, locating shaft 14 is arranged between up and down two bearing pins 7 of backrest bracket, the bearing pin 7 of locating shaft 14 and backrest bracket lower end all is located on the positioning seat 13, in backrest bracket 6 rotation processes, the bearing pin 7 that positioning seat 13 is followed locating shaft 14 and backrest bracket lower end moves together, gripper shoe 3 on the chassis offers limit sliding chutes 15, the two ends of locating shaft 14 are passed the side plate 9 of the backrest bracket left and right sides and are plugged in the limit sliding chutes 15, and locating shaft 14 has also played position-limiting action to the layback of backrest and backrest bracket in limit sliding chutes 15 interior slips; The front end of positioning seat 13 offers many clamp bar slots 16 from top to bottom, be provided with the latch 17 that matches with the draw-in groove 16 of positioning seat in base plate 2 slips, latch 17 upper ends are provided with the latch location-plate 18 that prevents the latch perk, latch location-plate 18 is fixedly linked with base plate 2, and latch 17 rear ends are connected with the latch slide control device.

As shown in Figure 1, described latch slide control device comprises handle 19, torque spring 20, handle is L shaped, handle 19 is to be connected to form by 22 two sections of handle 21 and drive links, handle 21 arranges perpendicular to the latch glide direction, drive link 22 arranges along the latch glide direction, handle 21 passes one of them gripper shoe and is exposed to outside the chassis, this end movable sleeve near handle 21 on the drive link 22 is connected to leader's rotating shaft locating piece 23, handle rotating shaft locating piece 23 is installed on the base plate 2 by a screw 24, and handle rotating shaft locating piece 23 rotates around screw, and screw 24 is the center of rotation of handle; Torque spring 20 is socketed on the torsion spring set screw 25, torsion spring set screw 25 is installed in screw fixed block 26 upper ends, screw fixed block 26 lower ends and base plate 2 are fixedly linked, the first spring arm 27 of torque spring 20 is plugged in the hole of latch rear end, and the second spring arm 28 of torque spring 20 is plugged on the drive link in the hole away from this end of handle; Handle 21 is stirred in front and back, and handle 19 integral body are rotated around screw, drives torque spring 20 and rotates, and under the elastic force effect of

torque spring

20,17 releases of the first spring arm 27 pulling latches, retraction are to realize that latch is to locking, the release of positioning seat.

On base plate 2, also be fixed with the limited block 29 that handle is carried out the front and back rotary spacing, limited block 29 is on the position of drive link away from this end of handle, have spacing runway 30 at limited block 29, this end away from handle on the drive link is inserted in the spacing runway 30.

Need to prove that the backrest bracket locking mechanism is not limited only to above-mentioned mechanical mechanism, can also adopt the gas bar to lock at an arbitrary position.

Claims

1. backrest of rotary chair locking mechanism, it is characterized in that: comprise positioning seat, the rear end of positioning seat is fixedly linked with the backrest bracket that is connected backrest, the front end of positioning seat offers many clamp bar slots from top to bottom, base plate on the chassis slides and is provided with the latch that matches with the draw-in groove of positioning seat, the latch upper end is provided with the latch location-plate that prevents the latch perk, and latch location-plate and base plate are fixedly linked, and latch is connected with the latch slide control device.

2. a kind of backrest of rotary chair locking mechanism according to claim 1, it is characterized in that: the rear end of positioning seat is provided with locating shaft, locating shaft is arranged between up and down two bearing pins of backrest bracket, the bearing pin of locating shaft and backrest bracket lower end all is located on the positioning seat, gripper shoe on the chassis offers limit sliding chutes, and the two ends of locating shaft are passed the side plate of the backrest bracket left and right sides and are plugged in the limit sliding chutes.

3. a kind of backrest of rotary chair locking mechanism according to claim 1, it is characterized in that: described latch slide control device comprises handle, torque spring, handle is L shaped, handle is to be connected to form by two sections of handle and drive links, handle passes one of them gripper shoe and is exposed to outside the chassis, drive link is connected to leader's rotating shaft locating piece near this end movable sleeve of handle, and handle rotating shaft locating piece is installed on the base plate by a screw, and handle rotating shaft locating piece rotates around screw; Torque spring is socketed on the torsion spring set screw, the torsion spring set screw is installed in screw fixed block upper end, screw fixed block lower end and base plate are fixedly linked, the first spring arm of torque spring is plugged in the hole of latch rear end, and the second spring arm of torque spring is plugged in the hole of drive link away from this end of handle; Handle is stirred in front and back, and handle integral body is rotated around screw, drives torque spring and rotates, and under the elastic force effect of torque spring, the release of the first spring arm pulling latch, retraction are to realize locking, the release of latch.

4. a kind of backrest of rotary chair locking mechanism according to claim 3, it is characterized in that: on base plate, also be fixed with limited block, limited block is on the position of drive link away from this end of handle, have spacing runway at limited block, this end away from handle on the drive link is inserted in the spacing runway.