CA1167432A - Seat belt retractor spring assembly - Google Patents
Seat belt retractor spring assemblyInfo
- Publication number
- CA1167432A CA1167432A CA000377860A CA377860A CA1167432A CA 1167432 A CA1167432 A CA 1167432A CA 000377860 A CA000377860 A CA 000377860A CA 377860 A CA377860 A CA 377860A CA 1167432 A CA1167432 A CA 1167432A
- Authority
- CA
- Canada
- Prior art keywords
- shaft
- casing
- seat belt
- cup
- holes
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
- Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
Abstract
Abstract of the Disclosure The invention relates to a spring assembly for retracting a spirally wound seat belt to retracted condition after extension in use, and provides means for locking the spring in pre-wound condition prior to assembly with the seat belt.
Description
The invention provides means for winding a seat belt to retracted condition after extension in use.
According to the present invention there is provided a seat belt retractor sprïng assembly which includes a cylindrical casing, a shaft having an end part rotatably mounted in the casing, a seat ~elt wound on the shaft externally to the casing and a spiral spring within the casing in surrounding relation to the end part of the shaft with its ends connected respectively to the casing and the end part of the shaft. A reIeasable means directly engages -the shaft and the casing for connecting the shaft to the cas.ing to hold the spring in any adjusted condition of winding about the shaft.
Fig. 1 is a transverse sectional view showing a wound seat belt in operative association with a retractor assembly including the means provided by the invention;
Fig~ 2 is a view taken on line 2-2 of Fig. l;
Fig. 3 is an exploded perspective view showing the parts which comprise the invention;
Fig. 4 is a transverse sectional view showing a wound seat belt in operative association with a retractor assembly which includes a second form the invention may take;
~' .
1 1 67~32 1 Fig, 5 is a view taken on line 5-5 of Fi~. 4, and Fig, 6 is an exploded perspective view of the parts including the second embodiment, Description of the Invent on An embodiment of the apparatus provided by the invention for retracting to wound condition a strip of material such as a seat belt is disclosed in Figs. 1 to 3 in operative association with a seat belt 2 which is spirally wound on a reel comprising a rotatable shaft 4 and end plates 6, only one of which is shown, The seat belt assembly is rotatably mounted on one or m~ e plates 8 which form part of the main frame of the seat belt assembly. A shaft 10 is connected axially to the rotatable seat belt assembly and extends through plate 8 and is provided on its outer end surface with a diametrically extending blade 12, The belt retractor device including the means provided by the invention compriSeS a casing formed o a cup-shaped cover 20 and a plate 22 which closes the open side of the casing and is mounted on fixed plate 8 by any suitable means such as the screws 24. A shaft 30 is mounted concentrically wi hin the casing and is journaled in a central opening 31 in plate 22 for rotation with respect to the fixed casing and cover which form the spring housing. The end surface 32 of the shaft, which is the end surface adjacent the wound seat belt assembly~
is formed with a diametrically extending Icerf 34 which receives the blade 12 on shaft 10 which forms part of the rotatable seat belt assembly. A spirally wound spring 40 surrounds the 3~
shaft 30 wi~lin the housing and has its ends connected-respectively to the shaft 30 and to the peripheral wall of the cover 20.
In the use and operation of the seat belt and belt retractor apparatus it is necessary to maintain the retractor spring in a normally wound condition so that it will be wound down on shaft 30 when the belt is pulled out and will then be in condition to retract the belt when it is released. It is therefore desirable to pre-wind the spring for instaliation in the seat belt assembly, and means are provided by the invention for maintaining the spring in such pre~wound condition.
Such-means comprise spaced parallel passages 50, 52 in the shaft 30 which extend axially of the shaft and open into its end surface 54 which is the surface adjacent the cover 20 and therefore opposite the seat belt assembly. These passages may be aligned with spaced openings 56, 58 in the bottom wall 60 of cover 20 by rotational adjustment of the shaft, and the parallel legs of a U-shaped clip 62 are passed through these openings and into the passages 50, 52 in the shat, thereby locking the shaft to the casing and preventing its rotation~with consequent locking of the spring in the pre-wound condition.
It will be understood by those skilled in the arts to which this invention relates that in assembling the spring assembly prior to installation with the seat belt assembly the spring will be adjusted to a desired pre-wound condition by rotation of the shaft and then locked in this condition by inserting the legs of the clip 62 through openings 56, 58 in .
~ _3_ ': ' '' . _ ' ' ' ' .
I :~ 67~32 the cover 20 and into the passages 509 52 in shaft 30, thereby locking the shaft to the casing and holding the spring . ..
in its pre-wound condition The spring retractor assembly is then operatively connected to the seat belt assembly with the blade 12 on the belt shaft 10 positioned in the kerf 34 in shaft 30 in order to operatively connect the two shafts.
A second form which the invention may take is disclosed in Figs. 4, 5 and 6 of the drawings. In this disclosure the basic parts of the seat belt assembly and the spring assembly may be identical and are so illustrated and numbered and need not be further described here.
~ he means disclosed in Figs. 4, 5 and 6 for releasabley connecting the shaft 30 to the casing comprise, first, two spaced parallel straight passages or grooves 70, 72 which are formed in the end surface 32 of shaft 30 on opposite sides of the kerf 34. An elongated passage 76 is formed in the cover plate 22 within the general plane of the plate, and extends from the outer peripheral edge of the plate through the part of the plate which surrounds the central opening 32 in which shaft 30 is journaled, then across central opening 32 as a chord of the opening, and then into the plate on the opposite side of the central opening. A straight pin 80 which has a diameter permitting it to be snugly pushed into the passage 76 is provided and is of such a length that it will extend throughout the entire length of the opening.
The pin is preferably provided at its outer end with a bent part 82 which forms a handle facilitating the insertion and withdrawal of tl-e pin ln~o and from the passage 76.
~ .' : . ,. ..
.
~ 1 6'~3~
It will be understood by those skilled in the art to which this invention relates that in assembling the spring o'perated belt retractor assembly the spring will be adjusted to its fully wound condition or to any desired condition of winding by rotation of shaft 30 and then locked in this condition by first aligning one of the slots 70, 72 with the passage i6 and then inserting the pin 80 into the passage and into and through one of the passages or grooves in the end surface of the shaft, thereby releasably connecting the shaft to the casing and locking the spring in its pre-wound-condition. Installation is effected by connecting the spring assembly to the seat belt assembly by positioning the blade 12 on the seat belt shaft 10 in the kerf 34 in shaft 30 in order to operatively connect the two shafts, after which the pin 44 is removed, releasing the spring and causing it to resiliently hold the seat belt in its ret~acted condition.
According to the present invention there is provided a seat belt retractor sprïng assembly which includes a cylindrical casing, a shaft having an end part rotatably mounted in the casing, a seat ~elt wound on the shaft externally to the casing and a spiral spring within the casing in surrounding relation to the end part of the shaft with its ends connected respectively to the casing and the end part of the shaft. A reIeasable means directly engages -the shaft and the casing for connecting the shaft to the cas.ing to hold the spring in any adjusted condition of winding about the shaft.
Fig. 1 is a transverse sectional view showing a wound seat belt in operative association with a retractor assembly including the means provided by the invention;
Fig~ 2 is a view taken on line 2-2 of Fig. l;
Fig. 3 is an exploded perspective view showing the parts which comprise the invention;
Fig. 4 is a transverse sectional view showing a wound seat belt in operative association with a retractor assembly which includes a second form the invention may take;
~' .
1 1 67~32 1 Fig, 5 is a view taken on line 5-5 of Fi~. 4, and Fig, 6 is an exploded perspective view of the parts including the second embodiment, Description of the Invent on An embodiment of the apparatus provided by the invention for retracting to wound condition a strip of material such as a seat belt is disclosed in Figs. 1 to 3 in operative association with a seat belt 2 which is spirally wound on a reel comprising a rotatable shaft 4 and end plates 6, only one of which is shown, The seat belt assembly is rotatably mounted on one or m~ e plates 8 which form part of the main frame of the seat belt assembly. A shaft 10 is connected axially to the rotatable seat belt assembly and extends through plate 8 and is provided on its outer end surface with a diametrically extending blade 12, The belt retractor device including the means provided by the invention compriSeS a casing formed o a cup-shaped cover 20 and a plate 22 which closes the open side of the casing and is mounted on fixed plate 8 by any suitable means such as the screws 24. A shaft 30 is mounted concentrically wi hin the casing and is journaled in a central opening 31 in plate 22 for rotation with respect to the fixed casing and cover which form the spring housing. The end surface 32 of the shaft, which is the end surface adjacent the wound seat belt assembly~
is formed with a diametrically extending Icerf 34 which receives the blade 12 on shaft 10 which forms part of the rotatable seat belt assembly. A spirally wound spring 40 surrounds the 3~
shaft 30 wi~lin the housing and has its ends connected-respectively to the shaft 30 and to the peripheral wall of the cover 20.
In the use and operation of the seat belt and belt retractor apparatus it is necessary to maintain the retractor spring in a normally wound condition so that it will be wound down on shaft 30 when the belt is pulled out and will then be in condition to retract the belt when it is released. It is therefore desirable to pre-wind the spring for instaliation in the seat belt assembly, and means are provided by the invention for maintaining the spring in such pre~wound condition.
Such-means comprise spaced parallel passages 50, 52 in the shaft 30 which extend axially of the shaft and open into its end surface 54 which is the surface adjacent the cover 20 and therefore opposite the seat belt assembly. These passages may be aligned with spaced openings 56, 58 in the bottom wall 60 of cover 20 by rotational adjustment of the shaft, and the parallel legs of a U-shaped clip 62 are passed through these openings and into the passages 50, 52 in the shat, thereby locking the shaft to the casing and preventing its rotation~with consequent locking of the spring in the pre-wound condition.
It will be understood by those skilled in the arts to which this invention relates that in assembling the spring assembly prior to installation with the seat belt assembly the spring will be adjusted to a desired pre-wound condition by rotation of the shaft and then locked in this condition by inserting the legs of the clip 62 through openings 56, 58 in .
~ _3_ ': ' '' . _ ' ' ' ' .
I :~ 67~32 the cover 20 and into the passages 509 52 in shaft 30, thereby locking the shaft to the casing and holding the spring . ..
in its pre-wound condition The spring retractor assembly is then operatively connected to the seat belt assembly with the blade 12 on the belt shaft 10 positioned in the kerf 34 in shaft 30 in order to operatively connect the two shafts.
A second form which the invention may take is disclosed in Figs. 4, 5 and 6 of the drawings. In this disclosure the basic parts of the seat belt assembly and the spring assembly may be identical and are so illustrated and numbered and need not be further described here.
~ he means disclosed in Figs. 4, 5 and 6 for releasabley connecting the shaft 30 to the casing comprise, first, two spaced parallel straight passages or grooves 70, 72 which are formed in the end surface 32 of shaft 30 on opposite sides of the kerf 34. An elongated passage 76 is formed in the cover plate 22 within the general plane of the plate, and extends from the outer peripheral edge of the plate through the part of the plate which surrounds the central opening 32 in which shaft 30 is journaled, then across central opening 32 as a chord of the opening, and then into the plate on the opposite side of the central opening. A straight pin 80 which has a diameter permitting it to be snugly pushed into the passage 76 is provided and is of such a length that it will extend throughout the entire length of the opening.
The pin is preferably provided at its outer end with a bent part 82 which forms a handle facilitating the insertion and withdrawal of tl-e pin ln~o and from the passage 76.
~ .' : . ,. ..
.
~ 1 6'~3~
It will be understood by those skilled in the art to which this invention relates that in assembling the spring o'perated belt retractor assembly the spring will be adjusted to its fully wound condition or to any desired condition of winding by rotation of shaft 30 and then locked in this condition by first aligning one of the slots 70, 72 with the passage i6 and then inserting the pin 80 into the passage and into and through one of the passages or grooves in the end surface of the shaft, thereby releasably connecting the shaft to the casing and locking the spring in its pre-wound-condition. Installation is effected by connecting the spring assembly to the seat belt assembly by positioning the blade 12 on the seat belt shaft 10 in the kerf 34 in shaft 30 in order to operatively connect the two shafts, after which the pin 44 is removed, releasing the spring and causing it to resiliently hold the seat belt in its ret~acted condition.
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A seat belt retractor spring assembly, comprising a cylindrical casing, a shaft having an end part rotatably mounted in the casing, a seat belt wound on the shaft externally to the casing, a spiral spring within the casing in surrounding relation to the end part of shaft with its ends connected respectively to the casing and the end part of the shaft, and releasable means directly engaging the shaft and the casing for connecting the shaft to the casing to hold the spring in any adjusted condition of winding about the shaft.
2. A seat belt retractor spring assembly according to claim 1, in which the releasable means extends through the casing into the shaft.
3. A seat belt retractor spring assembly according to claim 1, in which the casing comprises a cup shaped part having a bottom wall, and the releasable means comprises a removable connection between the shaft and the bottom wall of the casing.
4. A seat belt retractor according to claim 3, in which the releasable means for connecting the shaft to the casing comprises spaced holes in the casing, equally spaced passages in the end part of the shaft extending in parallelism axially of the shaft, and a U-shaped clip removably positioned within the holes in the casing and the passages in the shaft.
5. A seat belt retractor spring assembly according to claim 1 in which the casing comprises a cup shaped part and a cover for its open side, and the connecting means comprises a removable connection between the shaft and the cover.
6. A seat belt retractor spring assembly according to claim 5, in which the cover has a passage extending through it in the general plane of the cover, and the end surface of the shaft has at least one groove extending across it, and a pin is slidably positioned in the passage and groove.
7. A spring operated seat belt retractor device, comprising:
(a) a frame;
(b) a casing adapted to be connected to the frame and comprising:
(i) a cylindrical cup having a peripheral wall, a bottom wall and an open side, (ii) a substantially planar cover connected to the cup and entirely closing its open side and having outer and inner surfaces, (c) a shaft rotatably mounted concentrically within the casing with its one end within and closely adjacent the bottom wall of the cup, (d) a spiral spring within the casing having its ends connected to the periphery of the cup and to the shaft, and (e) means for releasably locking the spring to the casing in any predetermined prewound condition, comprising:
(i) spaced holes in the bottom wall of the cup which are positioned on opposite sides of the position of the axis of the shaft, (ii) spaced elongated holes in the shaft extending from the said one end surface of the shaft in the direction of the axis of the shaft and being spaced equally to the holes in the bottom wall of the cup and being so positioned that they may be aligned with the holes in the bottom wall of the cup on rotation of the shaft with respect to the casing, and (iii) a U-shaped wire clip the legs of which are spaced equally to the spacing of the holes in the bottom wall of the cup and the holes in the shaft, said clip being positioned with its legs within the holes in the bottom wall of the cup and the holes in the shaft thereby to releasably connect the shaft to the casing.
(a) a frame;
(b) a casing adapted to be connected to the frame and comprising:
(i) a cylindrical cup having a peripheral wall, a bottom wall and an open side, (ii) a substantially planar cover connected to the cup and entirely closing its open side and having outer and inner surfaces, (c) a shaft rotatably mounted concentrically within the casing with its one end within and closely adjacent the bottom wall of the cup, (d) a spiral spring within the casing having its ends connected to the periphery of the cup and to the shaft, and (e) means for releasably locking the spring to the casing in any predetermined prewound condition, comprising:
(i) spaced holes in the bottom wall of the cup which are positioned on opposite sides of the position of the axis of the shaft, (ii) spaced elongated holes in the shaft extending from the said one end surface of the shaft in the direction of the axis of the shaft and being spaced equally to the holes in the bottom wall of the cup and being so positioned that they may be aligned with the holes in the bottom wall of the cup on rotation of the shaft with respect to the casing, and (iii) a U-shaped wire clip the legs of which are spaced equally to the spacing of the holes in the bottom wall of the cup and the holes in the shaft, said clip being positioned with its legs within the holes in the bottom wall of the cup and the holes in the shaft thereby to releasably connect the shaft to the casing.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/151,614 | 1980-05-20 | ||
| US06/151,614 US4340190A (en) | 1980-05-20 | 1980-05-20 | Seat belt retractor spring assembly |
| US06/190,977 | 1980-09-26 | ||
| US06/190,977 US4340191A (en) | 1980-09-26 | 1980-09-26 | Seat belt retractor spring assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1167432A true CA1167432A (en) | 1984-05-15 |
Family
ID=26848795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000377860A Expired CA1167432A (en) | 1980-05-20 | 1981-05-20 | Seat belt retractor spring assembly |
Country Status (5)
| Country | Link |
|---|---|
| CA (1) | CA1167432A (en) |
| DE (1) | DE3116835A1 (en) |
| ES (1) | ES502304A0 (en) |
| FR (1) | FR2482863A1 (en) |
| GB (1) | GB2076635B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4487379A (en) * | 1982-12-07 | 1984-12-11 | The Stanley Works | Coilable tape rule with shifting hub, reel assembly therefor, and method of assembling |
| DE3417029A1 (en) * | 1984-05-09 | 1985-11-14 | Autoliv GmbH, 2200 Elmshorn | SPRING CAPSULE |
| DE3805007A1 (en) * | 1987-10-31 | 1989-05-18 | Kern & Liebers | Device for automatically retracting a safety belt |
| FR2639590B1 (en) * | 1988-11-30 | 1991-02-22 | Ecia Equip Composants Ind Auto | SPRING ARMOR BARREL IN PARTICULAR FOR A SEAT BELT REELER |
| FR2661468B1 (en) * | 1990-04-27 | 1995-05-05 | Glaenzer Spicer Sa | TRANSMISSION JOINT, PART OF TRANSMISSION LINE EQUIPPED WITH SUCH A JOINT AND METHOD OF SETTING UP A JOINT. |
| JPH05254389A (en) * | 1992-03-16 | 1993-10-05 | Takata Kk | Energized state holding device for energizing force assigning means in seat belt retractor |
| DE4318161A1 (en) * | 1993-06-01 | 1994-12-08 | Trw Repa Gmbh | Belt retractor for seat belt restraint systems in vehicles |
| DE4423729A1 (en) * | 1994-07-06 | 1996-01-11 | Takata Europ Gmbh | Spring powered belt retractor and method for its assembly |
| US5624084A (en) * | 1993-08-09 | 1997-04-29 | Takata Vehicle Safety Technology Gmbh | Tension reducer |
| GB2302682A (en) * | 1995-06-28 | 1997-01-29 | Europ Component Co Ltd | A seat belt retractor spring cassette |
| GB2348401B (en) * | 1999-03-31 | 2001-08-08 | Breed Automotive Tech | Retractor |
| DE10328051B4 (en) * | 2003-06-23 | 2007-04-05 | Autoliv Development Ab | Winding machine, for example for a safety belt |
| DE102004032310B4 (en) * | 2004-07-05 | 2008-05-21 | Autoliv Development Ab | Spring cassette for a rewinder |
| FR3009011B1 (en) * | 2013-07-25 | 2016-01-22 | Peugeot Citroen Automobiles Sa | DEVICE FOR AUTOMATICALLY POWERING THE TRACTION CABLES OF A SLIDING DOOR |
-
1981
- 1981-04-28 GB GB8113060A patent/GB2076635B/en not_active Expired
- 1981-04-28 DE DE19813116835 patent/DE3116835A1/en not_active Withdrawn
- 1981-05-18 FR FR8109845A patent/FR2482863A1/en active Granted
- 1981-05-19 ES ES502304A patent/ES502304A0/en active Granted
- 1981-05-20 CA CA000377860A patent/CA1167432A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2076635A (en) | 1981-12-09 |
| ES8203619A1 (en) | 1982-04-01 |
| FR2482863B3 (en) | 1983-04-01 |
| ES502304A0 (en) | 1982-04-01 |
| DE3116835A1 (en) | 1982-02-25 |
| GB2076635B (en) | 1983-11-23 |
| FR2482863A1 (en) | 1981-11-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |