CN2516403Y - Re-tension apparatus for seat belt - Google Patents
Re-tension apparatus for seat belt Download PDFInfo
- Publication number
- CN2516403Y CN2516403Y CN 02201980 CN02201980U CN2516403Y CN 2516403 Y CN2516403 Y CN 2516403Y CN 02201980 CN02201980 CN 02201980 CN 02201980 U CN02201980 U CN 02201980U CN 2516403 Y CN2516403 Y CN 2516403Y
- Authority
- CN
- China
- Prior art keywords
- piston
- pressure chamber
- seat belt
- pressure cavity
- type rotary
- 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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- 238000007789 sealing Methods 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- Automotive Seat Belt Assembly (AREA)
Abstract
The utility model relates to a safety belt pre-tensioner, which mainly comprises a gas generator and a clutch type rotary dynamic device, the side wall of a cylinder is provided with a channel across pressure cavity which is extended to the next operation pressure cavity, a ratchet clamp for controlling gas flow and ratchet is arranged on the channel so as to control the action of clutch. The piston is provided with an annular body, the annular body is arranged in the operation pressure cavity and can be rotated to drive the shaft; the pressure cavity is divided into two parts by the piston, one side of the piston and the pressure cavity form a pressure zone, the gas generated by the gas generator is conveyed into the pressure zone, the other side of the piston is connected with an exhaust hole which is led to the exterior. The utility model has the advantages that: as adopting the piston to drive the rotation of the belt-rolling wheel of the belt-rolling mechanism of the safety belt, the original reliability can be kept for long term; as adopting clutch type rotary dynamic device, the efficiency is added and the energy loss is less.
Description
Technical field
The utility model relates to a kind of safety device, mainly is a kind of seat belt pretensioner that is used for the seat belt system.
Background technology
The seat belt pretensioner usually is used for the automobile seat safety belt system.Bumping or moment first time of other emergency episode, be used for straining in advance seat belt, thereby more fixing driver and conductor makes it not thrown away forward, and touches other object.Thereby the employed piston of present seat belt pretensioner drives the tape feed roller of the tape mechanism of steel cable pulling safety strap and rotates.Its deficiency is that its waste of power is bigger, and relates to steel cable and whether can keep original characteristic for a long time, and long-term reliability can't effectively be protected.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of seat belt pretensioner.
The technical scheme that its technical matters that solves the utility model adopts.This seat belt pretensioner, mainly comprise gas generator and disengaging type rotary power unit, described disengaging type rotary power unit comprises two cylinders, the sidewall of cylinder is provided with the operation pressure chamber that a passage that crosses pressure chamber extends to the next door, its passage is provided with the ratchet folder of a control air-flow and ratchet, is used for the action of control clutch.Be provided with a piston, piston is provided with a ring body part, and this ring body partly is installed in the operation pressure chamber, can rotate and drive the axle rotation; Piston is divided into two parts with pressure chamber, and a side of piston forms a pressure zone with pressure chamber, and the gas that gas generator produces is admitted to pressure zone, is to connect deflation hole at the opposite side of piston, and deflation hole leads to the outside.
The technical scheme that its technical matters that solves the utility model adopts can also be further perfect.Described cylinder is the pressure chamber with elliptical shaped side wall, owing to adopt on the seal support next door, and combined with the body part of piston by the elasticity compressing.
The effect that the utility model is useful is: owing to directly adopted piston to drive the tape feed roller rotation of the tape mechanism of safety strap, thereby can keep original reliability for a long time; Adopted the disengaging type rotary power unit, thereby efficient increases and waste of power is few.
Description of drawings
Fig. 1 is an example structure scheme drawing of the present utility model;
The specific embodiment
Below in conjunction with embodiment the utility model is further described.This seat belt pretensioner, mainly comprise gas generator 1 and disengaging type rotary power unit, described disengaging type rotary power unit comprises two cylinders, cover plate 7 and base 8, the sidewall of cylinder is provided with the operation pressure chamber 4 that a passage that crosses the pressure chamber 2 with elliptical shaped side wall extends to the next door, its passage is provided with the ratchet folder of a control air-flow and ratchet 3, is used for the action of control clutch.Be provided with a piston 5, piston 5 is provided with a ring body part, and this ring body partly is installed in the operation pressure chamber 4, can rotate and drive the axle rotation; Piston 5 is divided into two parts with pressure chamber, and a side of piston forms a pressure zone with pressure chamber 2, and the gas that gas generator 1 produces is admitted to pressure zone, is to connect deflation hole at the opposite side of piston 5, and deflation hole leads to the outside; Sealing member 6 is bearing on the next door, and is combined with the body part of piston 5 by the elasticity compressing.Principle of work: produce directed air pressure by gas generator 1, air pressure driven plunger 5 drives tape feed roller by the disengaging type rotary power unit and rotates, on one section safety strap reel-to-reel belt wheel.
Claims (3)
1, a kind of seat belt pretensioner mainly comprises gas generator (1) and disengaging type rotary power unit, it is characterized in that:
(A), described disengaging type rotary power unit comprises two cylinders, the sidewall of cylinder is provided with the operation pressure chamber (4) that a passage that crosses pressure chamber (2) extends to the next door, its passage is provided with the ratchet folder of a control air-flow and ratchet (3), is used for the action of control clutch.
(B), be provided with a piston (5), piston (5) is provided with a ring body part, this ring body partly is installed in the operation pressure chamber (4), can rotate and drive axle rotation;
(C), piston (5) is divided into two parts with pressure chamber, one side of piston forms a pressure zone with pressure chamber (2), the gas that gas generator (1) produces is admitted to pressure zone, is to connect deflation hole at the opposite side of piston (5), and deflation hole leads to the outside;
2, seat belt pretensioner according to claim 1 is characterized in that described cylinder is the pressure chamber (2) with elliptical shaped side wall.
3, seat belt pretensioner according to claim 1 is characterized in that sealing member (6) is bearing on the next door, and is combined with the body part of piston (5) by the elasticity compressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02201980 CN2516403Y (en) | 2002-01-07 | 2002-01-07 | Re-tension apparatus for seat belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02201980 CN2516403Y (en) | 2002-01-07 | 2002-01-07 | Re-tension apparatus for seat belt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2516403Y true CN2516403Y (en) | 2002-10-16 |
Family
ID=33684674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02201980 Expired - Fee Related CN2516403Y (en) | 2002-01-07 | 2002-01-07 | Re-tension apparatus for seat belt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2516403Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019904A (en) * | 2008-10-15 | 2011-04-20 | 株式会社东海理化电机制作所 | Pretensioner |
| CN103832388A (en) * | 2014-02-27 | 2014-06-04 | 上海和励信息科技有限公司 | Drive unit clamping and fixing piece applied to pre-tightening safety device and pre-tightening safety device |
| CN104071046A (en) * | 2014-07-17 | 2014-10-01 | 江苏百佳斯特汽车制品有限公司 | Child seat for automobile |
-
2002
- 2002-01-07 CN CN 02201980 patent/CN2516403Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019904A (en) * | 2008-10-15 | 2011-04-20 | 株式会社东海理化电机制作所 | Pretensioner |
| CN102019904B (en) * | 2008-10-15 | 2013-01-16 | 株式会社东海理化电机制作所 | Pretensioner |
| CN103832388A (en) * | 2014-02-27 | 2014-06-04 | 上海和励信息科技有限公司 | Drive unit clamping and fixing piece applied to pre-tightening safety device and pre-tightening safety device |
| CN103832388B (en) * | 2014-02-27 | 2016-04-27 | 上海和励信息科技有限公司 | For driver element holding firmware and the prefastening safety device of prefastening safety device |
| CN104071046A (en) * | 2014-07-17 | 2014-10-01 | 江苏百佳斯特汽车制品有限公司 | Child seat for automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: FU DANREN Free format text: FORMER OWNER: HANGZHOU WALT ELECTRICAL TECHNOLOGY DEVELOPMENT CO.LTD. Effective date: 20031010 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20031010 Address after: Hangzhou City, Zhejiang province 310002 River Road No. 61 room 1006 Patentee after: Fu Danren Address before: 310002, room 26, 503 Zijin Road, Zhejiang, Hangzhou Patentee before: Hangzhou Wote Electromechanical Science & Technology Development Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20021016 |