CN2595257Y - Chassis with safety device - Google Patents
Chassis with safety device Download PDFInfo
- Publication number
- CN2595257Y CN2595257Y CN 02290052 CN02290052U CN2595257Y CN 2595257 Y CN2595257 Y CN 2595257Y CN 02290052 CN02290052 CN 02290052 CN 02290052 U CN02290052 U CN 02290052U CN 2595257 Y CN2595257 Y CN 2595257Y
- Authority
- CN
- China
- Prior art keywords
- clamping screw
- roller
- steel bushing
- regulating
- pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a chassis with a safety device. The utility model mainly comprises a transverse rod, a bottom plate, a conical tube, a movable seat and a regulating device, wherein, the regulating device is composed of a regulating seat, a roller seat, a regulating rod, a roller, a regulating pressure spring, a lock bolt, a plastic pad, an interstage sleeve, a steel sleeve, a small pressure spring, a lock tube and a lock nut; the regulating pressure spring is arranged on the lock bolt in the winding way, one end of the regulating pressure spring is abutted on a pad sheet, and the other end is abutted on the lock bolt; the other end face of the lock bolt is always contacted with the roller; the steel sleeve is inserted in the interstage sleeve, an inner hole of the steel sleeve and the lock bolt are in clearance fit, and the external surface and a brake sheet are in clearance fit. The utility model has the advantages that when people pull upwards or downwards the regulating rod, the roller is abutted on the lock bolt and compresses the pressure spring, the lock bolt and the steel sleeve are together moved forwards, and the brake sheet and the pad sheet can not be mutually uncoupled; only the backward external force acts on a backrest, the steel sleeve can rearwards move, and a chair back of a rotary chair can forwards oscillate.
Description
Technical field
The utility model relates to the matching component of swivel chair, specifically is a kind of chassis with safety device that connects seat support and the air pressure rod and the chair back.
Background technology
At present, be used in the supporting existing chassis of swivel chair, the locking of regulating brake(-holder) block by governor motion with loosen, the seat support and the chair back of swivel chair are swung within the specific limits, behind the take-off the brake sheet, backrest is returned to initial position at once, in the backrest resilience, backrest can impact the back the people, makes the people feel very dangerous.
Summary of the invention
The purpose of this utility model provides a kind of chassis of regulating band safety device safe in utilization.
The technical scheme that its technical problem that solves the utility model adopts.The chassis of this band safety device, it mainly comprises cross bar, base plate, conical pipe, sliding seat and adjusting device, and the base plate front end is connected with cross bar and fixed head, and conical pipe is welded on fixed head central authorities.The rear end of base plate connects sliding seat, sliding seat is provided with the regulating sleeve that connects swivel chair back of the body pipe, end by brake(-holder) block connects sliding seat, the alternate stacked activity cross-under of the other end and pad is on steel bushing, described adjusting device, by adjustment seat, roller mount, adjusting rod, roller, regulate stage clip, clamping screw, plastic mattress, interstage sleeve, steel bushing, small pressure spring, locking pipe and locking nut are formed, regulate stage clip around the home on clamping screw, regulate stage clip one end roof pressure pad, other end roof pressure clamping screw, the other end of clamping screw contacts with roller all the time, steel bushing is bumped in interstage sleeve, steel bushing endoporus and clamping screw matched in clearance, outer surface and brake(-holder) block matched in clearance.
The technical scheme that its technical problem that solves the utility model adopts can also be further perfect.In the middle part of base plate adjusting device and brake(-holder) block are set, an end of brake(-holder) block connects sliding seat, and the alternate stacked activity cross-under of the other end and pad is on steel bushing.Periphery and base plate welding in the middle of the described adjustment seat, clamping screw one end of adjustment seat inboard passes pad, the other end passes steel bushing, small pressure spring, plastic mattress and locking sleeve, is movably connected in by locking sleeve on another side plate of base plate, uses the locking nut screwing clamping screw; Regulate stage clip and be wound on the clamping screw, one end roof pressure pad, pad one end roof pressure are regulated the head of stage clip other end roof pressure clamping screw at adjustment seat bottom surface inwall, and the another side of clamping screw is contacted with roller all the time.Two rollers are movably connected on the roller mount by two roller pins respectively, roller mount flexibly connects by rivet and adjustment seat, and by roller mount, rivet and two rollers, being built into the rivet is axis, eccentric wheel so that two rollers are salient point welds adjusting rod in the inboard of the roller mount other end.The two sides of roller mount are provided with two little shelves covers that are enclosed within on the rivet, block the move left and right of roller mount; Small pressure spring is wound on the clamping screw, an end roof pressure steel bushing, and other end roof pressure plastic mattress, plastic mattress interts on clamping screw, with the steel bushing matched in clearance.
The effect that the utility model is useful is: during the operation adjusting device, when not appointing you to pull adjusting rod up or down, roller roof pressure clamping screw compression press spring, clamping screw and steel bushing are moved forward together, can not allow and unclamp mutually between brake(-holder) block and the pad, only when backward external force acts on the backrest, steel bushing is moved backward, loosen between brake(-holder) block and the pad, the chair back of swivel chair just can be swung forward, can swing.
Description of drawings
Fig. 1 is a perspective view of the present utility model;
Fig. 2 is an adjusting device schematic diagram of the present utility model;
The specific embodiment:
Below in conjunction with embodiment the utility model is further described.As shown in Figure 1 and Figure 2, the chassis of this band safety device, front end welding cross bar 24 at base plate 1, there are several holes to be used for connecting the seat support of swivel chair on the cross bar 24,1 front end welding fixed head 21 at base plate, at central authorities' welding conical pipe 22 of fixed head 21, pivot bush unit air pressure rod, the whole pallet of fixed support.The adjusting rod 32 that is N shape, by being welded on adjusting steel bushing 34 location on base plate 1 side, adjusting rod 32 1 ends are positioned at the central authorities of conical pipe 22, top-pressure gas pneumatic rod.Pulling the other end of adjusting rod 32, is that supporting-point rotates to regulate steel pipe 34, and one that compresses air pressure rod moves up and down, and air pressure rod is risen or decline, thereby drives the lifting of chair.Adjusting rod 32 stops swinging, and is wound on the torsion of the torque spring 33 on the adjusting rod 32, springs back to initial position.The end of base 1 flexibly connects sliding seat 25 by rivet 29, the central fixedly connected regulating sleeve 26 of sliding seat 25, but at regulating sleeve 26 inboard matched in clearance back of the body pipes, be fixed on the backrest by back of the body pipe, make the backrest can be up and down like this.Regulating sleeve 26 inboards are provided with latch segment 27 and bolt 28.Two torsion springs 23 of coiling on rivet 29, one end of torsion spring 23 is fixed on the base plate 1, other end roof pressure rivet 30, rivet 30 is riveted on the sliding seat 25, on rivet 30, penetrate brake(-holder) block 6, the other end of brake(-holder) block 6 and pad 5 alternate stacked activity cross-under are provided with adjusting device in the middle part of base plate 1 on steel bushing 7.Periphery welds with base plate 1 in the middle of the described adjustment seat 11, clamping screw 13 1 ends of adjustment seat 11 inboards pass pad 10, the other end passes pad 9, steel bushing 7, small pressure spring 4, plastic mattress 3, pad 2 and locking sleeve 19, be movably connected in by locking sleeve 19 on another side plate of base plate 1, tighten clamping screw 13 with locking nut 20, regulating stage clip 12 is wound on the clamping screw 13, one end roof pressure pad 10, pad 10 1 end roof pressures are at adjustment seat 11 bottom surface inwalls, the head of its other end roof pressure clamping screw 13 contacts the another side of clamping screw 13 all the time with roller 14.Two rollers 14 are movably connected on the roller mount 17 by two roller pins 15 respectively, roller mount 17 flexibly connects by rivet 16 and adjustment seat 11, two sides are by two little shelves covers 31 that are enclosed within on the rivet 16, shelves are lived the move left and right of roller mount 17, by roller mount 17, rivet 16 and two rollers 14, being built into rivet 16 is axis, is the eccentric wheel of salient point with two rollers 14.At the inboard of roller mount 17 other ends welding adjusting rod 18, can pull adjusting rod 18 and swing up or down.
Below in conjunction with embodiment the utility model is made motion analysis: when the backrest a certain position of swinging back, mechanism is locked, and at this moment torsion spring 23 carries out bending along rivet 30, produces torsion F, we are decomposed into two power to power F, and one: the power f that makes sliding seat 25 answer backward
Draw, two: make brake(-holder) block 6 around the power that rivet 30 is rotated, be converted into the power f between brake(-holder) block 6 and the steel bushing 7
Press, invar cover 7 needs equilibrium of forces, and steel bushing 7 just has been subjected to the active force of clamping screw 13, direction and f
PressOn the contrary, big or small same f
PressSwing up or down when we pull adjusting rod 18, roller mount 17 is rotated around rivet 16, compression press spring 12 forces in the clamping screw 13 and moves, because of having one between clamping screw 13 and the steel bushing 7, with power f
PressOpposite power, thus frictional force produced between the two, and under the effect of frictional force, steel bushing 7 and then moves in the clamping screw.Steel bushing 7 is as a mold insert in the interstage sleeve 8, interstage sleeve 8 also with within move, allow interstage sleeve 8, brake(-holder) block 6, pad 5 and plastic mattress 3 mesh together all the time like this.The frictional force and the power F that produce between interstage sleeve 8, pad 5 and plastic mattress 3 and the brake(-holder) block 6, equal and opposite in direction, direction is opposite.Realized that we pull after the adjusting rod 18, sliding seat can not replied at once, makes the not resilience at once of backrest that is connected on the sliding seat, makes the people feel very safe.
In the backrest a certain position of swinging back, pull adjusting rod 18, we apply a power backward to backrest again, promptly by power F shown in Figure 1
After, f
AfterDirection opposite with the direction of F, thereby weakened power F, make from the power f of F decomposition
PressAlso reduce, the stiction that acts on steel bushing 7 and the clamping screw 13 also reduces, along with F
AfterIncrease, make the stiction on steel bushing 7 and the clamping screw 13, it is little of extremely to be reduced to the elastic force that produces than small pressure spring 4, steel bushing 7 is just replied, interstage sleeve 8, brake(-holder) block 6, pad 5 and plastic mattress 3 are unclamped each other, and sliding seat 25 is replied, and backrest is also replied thereupon.
If in the backrest a certain position of swinging back, pull adjusting rod 18, we apply a power forward to backrest again, promptly by power F shown in Figure 1
Before, f
BeforeDirection consistent with the direction of F, thereby increased power F, make from the power f of F decomposition
PressAlso increase, the stiction that acts on steel bushing 7 and the clamping screw 13 also increases, and impels interstage sleeve 8, brake(-holder) block 6, pad 5 and plastic mattress 3 can not separate mutually.Sliding seat can't resilience, and backrest can only rest on original position.
To sum up, pull after the adjusting rod 18 the backrest a certain position of swinging back, and sliding seat can only stop, and has only to power backward of backrest, and backrest just can be returned to position all the time.The people feels as safe as a house when using chassis of the present utility model.
Claims (4)
1, a kind of chassis with safety device, it mainly comprises cross bar (24), base plate (1), conical pipe (22), sliding seat (25) and adjusting device, base plate (1) front end is connected with cross bar (24) and fixed head (21), and conical pipe (22) is welded on fixed head (21) central authorities; The rear end of base plate (1) connects sliding seat (25), sliding seat (25) is provided with the regulating sleeve (26) that connects swivel chair back of the body pipe, end by brake(-holder) block (6) connects sliding seat (25), the alternate stacked activity cross-under of the other end and pad (5) is on steel bushing (7), it is characterized in that: described adjusting device, by adjustment seat (11), roller mount (17), adjusting rod (18), roller (14), regulate stage clip (12), clamping screw (13), plastic mattress (3), interstage sleeve (8), steel bushing (7), small pressure spring (4), locking sleeve (19) and locking nut (20) are formed, regulate stage clip (12) around the home on clamping screw (13), regulate stage clip (12) one end roof pressure pads (10), other end roof pressure clamping screw (13), the other end of clamping screw (13) contacts with roller (14) all the time, steel bushing (7) is bumped in interstage sleeve (8), steel bushing (7) endoporus and clamping screw (13) matched in clearance, outer surface and brake(-holder) block (6) matched in clearance.
2, the chassis of band safety device according to claim 1, it is characterized in that: adjusting device and brake(-holder) block (6) are set in the middle part of base plate (1), one end of brake(-holder) block (6) connects sliding seat (25), and the alternate stacked activity cross-under of the other end and pad (5) is on steel bushing.
3, the chassis of band safety device according to claim 1, it is characterized in that: periphery and base plate (1) welding in the middle of the described adjustment seat (11), inboard clamping screw (13) one ends of adjustment seat (11) pass pad (10), the other end passes steel bushing (7), small pressure spring (4), plastic mattress (3) and locking sleeve (19), be movably connected in by locking sleeve (19) on another side plate of base plate (1), tighten clamping screw (13) with locking nut (20); Regulating stage clip (12) is wound on the clamping screw (13), one end roof pressure pad (10), pad (10) one end roof pressures are at adjustment seat (11) bottom surface inwall, regulate the head of stage clip (12) other end roof pressure clamping screw (13), the another side of clamping screw (13) is contacted with roller (14) all the time; Two rollers (14) are movably connected on the roller mount (17) by two roller pins (15) respectively, roller mount (17) flexibly connects by rivet (16) and adjustment seat (11), by roller mount (17), rivet (16) and two rollers (14), being built into rivet (16) is axis, with two rollers (14) is the eccentric wheel of salient point, at the inboard of roller mount (17) other end welding adjusting rod (18).
4, according to the chassis of claim 1 or 3 described band safety devices, it is characterized in that: the two sides of roller mount (17) are provided with two little shelves covers (31) that are enclosed within on the rivet (16), block the move left and right of roller mount (17); Small pressure spring (4) is wound on the clamping screw (13), an end roof pressure steel bushing (7), and other end roof pressure plastic mattress (3), plastic mattress (3) intert on clamping screw (13), with steel bushing (7) matched in clearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02290052 CN2595257Y (en) | 2002-12-03 | 2002-12-03 | Chassis with safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02290052 CN2595257Y (en) | 2002-12-03 | 2002-12-03 | Chassis with safety device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2595257Y true CN2595257Y (en) | 2003-12-31 |
Family
ID=33749426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02290052 Expired - Fee Related CN2595257Y (en) | 2002-12-03 | 2002-12-03 | Chassis with safety device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2595257Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113796688A (en) * | 2021-09-30 | 2021-12-17 | 中山市东立家具配件有限公司 | Stepless locking chassis of office chair |
-
2002
- 2002-12-03 CN CN 02290052 patent/CN2595257Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113796688A (en) * | 2021-09-30 | 2021-12-17 | 中山市东立家具配件有限公司 | Stepless locking chassis of office chair |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031231 Termination date: 20100104 |