CA1122949A - Safety belt roll-up device - Google Patents
Safety belt roll-up deviceInfo
- Publication number
- CA1122949A CA1122949A CA332,621A CA332621A CA1122949A CA 1122949 A CA1122949 A CA 1122949A CA 332621 A CA332621 A CA 332621A CA 1122949 A CA1122949 A CA 1122949A
- Authority
- CA
- Canada
- Prior art keywords
- cam
- control disk
- spring
- safety belt
- disk
- 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
- B60R22/36—Belt retractors, e.g. reels self-locking in an emergency
- B60R22/405—Belt retractors, e.g. reels self-locking in an emergency responsive to belt movement and vehicle movement
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
Abstract of the Disclosure Safety belt roll-up device with a release mechanism which in case of danger activates a control disk and locking means which block the belt shaft. A cam having an actuating dog for actu-ating the locking means is associated coaxially with the control disk and rotatable relative thereto. A spring holds the dog in a predetermined starting position relative to the control disk, which spring can be deflected resiliently relative to the con-trol disk in opposite directions of rotation. Because of its ability to be deflected in opposite directions, a single type roll-up device will serve where previously right and left devices are needed.
Description
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I Back round of the Invention Field of the Invention The invention relates to a safety belt r~ up device with an arrangement for blocking the belt reel in the event of danger, having a release mechanism for impeding a control disk with control teeth~preferably at the outer circumference, which disk ! is freely rotatable relative to the belt shaft. The device has a locking arrangement which can be actuated by the control disk, for blocking the belt reel.
! -lo- Description of the Prior Art In safety belt roll-up devices of this type, the purpose of the control disk is to initiate the activation of the locking device, i.e., the blocking of the roll-up device in such a manner that the control disk is arrested if the vehicle is decelerated, for instance, via a mechanical release mechanism, e.g., a so-called ball sensor. During the subsequent unwinding ~f the belt, the belt reel and the belt shaft rotate. Great emphasis is placed on the fact that this rotation is terminated by letting the blocking arrangement become effective after an angular travel distance as short as possible. To this end it is necessary that the control disk can execute a relative motion with respect to a predetermined starting position, Lor instance by the provision that the control disk is under the action of a spring and can ~22~
\
be resiliently deflected only in one direction, whereupon it returns into the starting position. Such safety belt roll-up devices are fastened in a mirrol~symmetrical arrangement to the oppositely located vehicle frames (right and left-hand instal-lation), so that in the last described solution, control disks with different spring suspension would be required, which makes among other things quantity production o~ such safety belt roll-up devices more difficult.
Summary of the Invention -10- An object of the present invention is to provide a safety belt roll-up device of the type mentioned at the outset in which only a single roll-up device type is required for right and le~`t-hand installation.
With the foregoing and other objects in ~iew, there is providad in accordance with the invention, a safety belt roll-up device with belt shaft blocking means having a frame, a rotatable belt shaft on which a belt is wound mounted in the frame, blocking means with stationary locking teeth and a locking pawl, said pawl being movable to engage the stationary locking teeth for blocking the belt shaft, -20- a control disk with control teeth for activating said blocking means to effect blocking of the belt shaft, said disk freely rotatable relative to the belt shaft, a release mechanism which is triggered when the vehicle exceeds a permissible acceleration or deceleration~
for impeding rotation of the control disk by contact with said con-trol teeth, a cam mounted coaxially with the control disk with the cam rotatable relative to the control disk in opposite directions .
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.' ' .
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of rotation, stop means to permit only a part ~urn of the cam in either direction of rotation relative to the control disk, said cam having an actuat-ing dog for activating the blocking means by contacting said locking pawl when the cam and disk rotate at a speed different from the shaft causing the pawl to move into engagement with the locking teeth, and said dog -2a-tr,j~ ~, i, ..:
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held in a predetermined starting position relative to the control disk by at least one spring which can be deflected resiliently relative to the control disk in opposite directions of rotation.
Other features which are considered as characteristic for the invention are set forth in the appended claimsO
Although the i~vention is illustrated and described herein as embodied in a safety belt roll-up device, it is nevertheless not intended to be limited to the details shown~ since various . . modifications may be made therein without departing from the -10- spirit of the invention and within the scope and range of e~ui-valents of the claims.
Brief DescriPt-ion of the Drawings T.he invention, however, together with additional objects and advantages thereof will be best understood from the following description when read in connection with the accompanying drawings, in ~hich:
FIG. 1 diagrammatically illustrates in a slde view the safety belt roll-up device showing release mechanism control disk, and locking means, -20-FIG. 2 is a partial cross section of the safety belt roll-up device taken along line II-II of FIG. 1, FIGS. 3 and 4 illustrate a first embodiment of the control disk of the safety belt roll-up device according to the invention in two different positions of operation, i.e. in normal position ~ Z~3 and activated position, i FIG. 5 is a sectional view of the control disk taken along line III-III of FIG. 3, FIG. 6 is a variant of FIG. 5, FIGS. 7 and 8 illustrate a second embodiment of the control disk of the safety belt roll-up device according to the invention in two different positions of operation, FIG. 9 schematically shows a third embodiment of the control disk, -10- FIGS. 10 and 11 schematically illustrate a fourth and fi~th embodiment of the control disk, and , ~IG. 12 shows the loop from FIG. 11 in detail.
Detailed Description of Invention Accordin~ to the invention, the control disk is associated co-axially with a cam which is rotatable relative to the control disk.
The cam has an actuating dog for the locking device and is held in a predetermined starting position relative to the control dis~
by at least one spring and can be deflected resiliently in opposite directions of rotation relative to the control disk. In this manner, a single type of roll-up device can be used for right--20- and left-hand installation, since the control disks can be de-~ flected resiliently in both possible directions of rotation and,; when released, automatically returns to the starting position.
In an embodiment of the safety belt roll-up device according to the invention, which is particularly simple as far as assembly is concerned and saves space, the cam is mounted freely rotatably _4_ i ~1229~9 on a bearing hub Or the control disk and ls axially secured by a stop, preferably by a resilient pro,jection which can be hooked ; into a concentric circular slot in the hub. In this manner, the cam can be snapped onto the bearing hub of the control disk with-out effort in the assembly, so that no separate stop elements are required for securing same in the axial direction.
According to a further embodiment of the invention, the control disk and the cam are provided with recesses which face each - other and together form one or several coaxial and arc-shaped -10- receiving channels LOr the springs. Radially or axially aligned stops of the control disk and the cam are provided in the ~icinity ol the channels. The stops are held in the alignment or starting position by spring force.
. j The radially aligned stops of the control disk and the cam are preferably tensioned against each other by the free, projecting spring legs of a loop spring mounted on an axial hub part. This solution permits particularly large control distances.
In FIGS. 1 and 2, the housing 1 of a safety belt roll-up device made of a stable material, consists basically of two side plates -20- 2 and a cross piece 3. Rotatably mounted in the side plates 2, of which only one is shown in the figures, is the belt shaft 4 which projects beyond the side plate 2 and has a planar radial end shoulder 5 as well as a thin cylindrical journal pin 6. The safety belt wound on the belt shaft 4 is designated by numeral 7.
~astened to the outside surface of the side plate 2 is a ratchet ~iz~
gear 9 with internal ratchet teeth 10. A two-arm rat¢het pawl - 11 on a bearing pin 12 is pivoted eccentrically to the belt shaft at the end ~ace extension 5 of the belt shaft 4. In FIG. 1 the upper locking edge of this ratchet pawl 11 is pushed by a spring 13 toward the belt shaft. For the sake of clarity, a control disk 14 is shown only dashed in FIG. 1 and an inertial disk 15 connected to the ~ontrol disk is not shown. The inertial disk 15 (FIG. 2) has a bearing extension 16 with a bearing hole. The bearing extension 16 carries integrally therewith a control dog -10- 18. The-control disk 14 provided with a corresponding bearing opening can be pushe~ with a positive engagement onto the bearing extension 16 and the control dog 18. The unit of control disk 14/
; inertial disk 15 is rotatably mounted relative to the belt shaft 4 on the journal pin 6 of the belt shaft 4. The control disk 14 has radial, narrow control teeth 20 which agree as to pitch and number of teeth with the ratchet teeth 10. A release mechanism designated generally by numeral 21 is in the form o~ a so-called ball sensor, consisting of a base plate 22 fastened to the hous-ing o~ the automatic device, with a centering hole 23, a ball -20- 24 and a tiltable control lever 25 lightly supported on the ball 24. The release mechanism 21 is ac~uated in the event of an excessive deceleration o~ the vehicle. Then, the ball 24 moves outside the area of the centering hole 23 with the result that the control lever 25 is pushed upward. This stops the control disk 14. The sa~ety belt 7 is unwound slightly until the control dog 18 runs up on the inside surface o~ the ratchet pawl 11 due to .
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¦ the relati~e motion between the belt shart 4 and the control¦ disk 14. The ratchet pawl 11 theb pushes against the ratchet teeth 10.
In the following, control disks which are different from the control disk according to FIGS. l and 2 are explained.
- , In ~he embodiment example according to FIGS. 3, 4 and ~, the con-trol unit 30 has a ~lat control disk 32 with control teeth 31 -arranged at its outer circum~erence and also has a bearing hub 33 with a concentric circular groove 34 as well as a collar 35.
-10- A circular recess 36 is provided in part of the collar 35. As clearly shown in FIGS. 3 and 5, a flat cam 37 is mounted freely rotatably on the bearing hub 33. This cam 37 has a resilient projection 38 which can be hooked resiliently into the concentric circular groove 34 when the cam is placed on the bearing hub, thereby axially securing the cam. The cam 37, similar to the control disk 32, also has a circular-arc-shaped recess 39. The recesses 36, 39 o~ the control disk and the cam, radially of~set from each other, form a closed receiving channel 36/39 for a compression spring 40. The shoulders of the recesses 36 and 39, -20- terminating the circular arc of the receiving channel at both ends, form radially aligned stops 41~ 42 and 43, 44, which are tensioned against each other by the two ends of the spring 40 contained in the receiving channel 36/39. When the release mechanism 21 becomes eifective and gets into the blocking position, it locks the control disk 32 by contact at the control teeth 31 i llZZ949 ! The initial or starting position is shown in FIG. 3, while in FIG. 4 that position is shown in which some belt 7 wa unwound fr~m shaft 4 and the blocking of the automatic device, i.e., the blocking of the belt shaft 4, completed. It is seen clearly that in this process the stops 41 and 42, 43 and 44 of the control disk and the cam have shifted clockwi~ relative to each other by the angle a. With the release of the control unit 30, i.e. it - ~ is no longer activated by release mechanism 21, the tensioned spring 40 again brings the corresponding stops into alignment -10- (starting position). While the control unit 30 was being actu-ated, the ratchet pawl designated with 11 in FIGS. 1 and 2 was moved into the locking position by means of the control dog 46 o~ the cam 37. The ~igures also clearly show that due to the particular manner of arranging the spring 40, a deflection of ! the cam 37 counterclockwise is also possible. Thereafter, upon release, the stops get into mutual alignment again.
The embodiment example according to FIG. 6 dif~ers ~rom the embodiment example according to FIGS. 3 to 6 in that the control disk 32' and cam 37' are provided with ~xially opening recesses -20- 36' and 39' as well as with axially aligned stops Ior the spring 40'.
In the embodiment example according to FIGS. 7 and 8, there is located, on both sides o~ each of th0 stops 47 and 48 of the con-~ trol disk 49 and the cam ~0, a circular-arc-shaped receiving , channel 51 and channel 52 for receiv~ng a spring 53 each. The _~_ I
~Z~49 springs ~3 are braced against the radially aligned stops 47~
48 as well as at the other end against the corresponding shoulders 54 defining the receiving channels, of the cam ~0. Here, too, a relative motion of the control disk and the cam, for instance, by the angle a clockwise as well as counterclockwise is possible, as shown in FIG. 8. The stops 47 and 48 are pushed back into their alignment or starting position aIter the load ceases.
In the embodiment example according to FIG. 9, annular recesses ~re provided in the control disk 55 and the cam 56, which form an annular receiving channel 57 of the control disk 55 and the cam 56, with the exception of the stops 58, 59, arranged in the area of the receiving channel 57 and radially aligned with each other. Tbe spring end~ of a single spring 60, bent in the form of a ring, are braced against these stops.
In the embodiment example according to FIG. 10~ a control disk 61 has a stop 63 which projects into a recessed cavity 62, while the cam 64 which is coaxial with the control disk 61 and cooper-ates therewith, has a stop 65 facing the stop 63. Mounted on a hub part or on the outer circumference o~ the cam 64 is a formed spring 66 with two radially projecting ~ree spring legs 66' and 66", which are braced against the radially aligned stops 63 and 65 and tension them against each other. Here too, -a relative motion in both directions of rotation is possible, the dash-dotted lines indicating the actuated position of the cam a~ter a relative motion.
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1~1229~9 !
In the embodiment example according to FIGS. 11 and 12, a loop spring 67, shown as a detail in FIG. 12, is molmted on a hub part of the cam 68 with several spring turns instead of the formed spring according to FIG. 10. The freely projecting spring legs 67l and 67" tension the stops 69 and 70 of the cam 68 and the control disk 71 against each other. Here, too, the deflected position of the cam 63 or the stop 70 of the cam 68 is indicat-d.
, .
I Back round of the Invention Field of the Invention The invention relates to a safety belt r~ up device with an arrangement for blocking the belt reel in the event of danger, having a release mechanism for impeding a control disk with control teeth~preferably at the outer circumference, which disk ! is freely rotatable relative to the belt shaft. The device has a locking arrangement which can be actuated by the control disk, for blocking the belt reel.
! -lo- Description of the Prior Art In safety belt roll-up devices of this type, the purpose of the control disk is to initiate the activation of the locking device, i.e., the blocking of the roll-up device in such a manner that the control disk is arrested if the vehicle is decelerated, for instance, via a mechanical release mechanism, e.g., a so-called ball sensor. During the subsequent unwinding ~f the belt, the belt reel and the belt shaft rotate. Great emphasis is placed on the fact that this rotation is terminated by letting the blocking arrangement become effective after an angular travel distance as short as possible. To this end it is necessary that the control disk can execute a relative motion with respect to a predetermined starting position, Lor instance by the provision that the control disk is under the action of a spring and can ~22~
\
be resiliently deflected only in one direction, whereupon it returns into the starting position. Such safety belt roll-up devices are fastened in a mirrol~symmetrical arrangement to the oppositely located vehicle frames (right and left-hand instal-lation), so that in the last described solution, control disks with different spring suspension would be required, which makes among other things quantity production o~ such safety belt roll-up devices more difficult.
Summary of the Invention -10- An object of the present invention is to provide a safety belt roll-up device of the type mentioned at the outset in which only a single roll-up device type is required for right and le~`t-hand installation.
With the foregoing and other objects in ~iew, there is providad in accordance with the invention, a safety belt roll-up device with belt shaft blocking means having a frame, a rotatable belt shaft on which a belt is wound mounted in the frame, blocking means with stationary locking teeth and a locking pawl, said pawl being movable to engage the stationary locking teeth for blocking the belt shaft, -20- a control disk with control teeth for activating said blocking means to effect blocking of the belt shaft, said disk freely rotatable relative to the belt shaft, a release mechanism which is triggered when the vehicle exceeds a permissible acceleration or deceleration~
for impeding rotation of the control disk by contact with said con-trol teeth, a cam mounted coaxially with the control disk with the cam rotatable relative to the control disk in opposite directions .
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.' ' .
1~12Z~
of rotation, stop means to permit only a part ~urn of the cam in either direction of rotation relative to the control disk, said cam having an actuat-ing dog for activating the blocking means by contacting said locking pawl when the cam and disk rotate at a speed different from the shaft causing the pawl to move into engagement with the locking teeth, and said dog -2a-tr,j~ ~, i, ..:
~zz~
held in a predetermined starting position relative to the control disk by at least one spring which can be deflected resiliently relative to the control disk in opposite directions of rotation.
Other features which are considered as characteristic for the invention are set forth in the appended claimsO
Although the i~vention is illustrated and described herein as embodied in a safety belt roll-up device, it is nevertheless not intended to be limited to the details shown~ since various . . modifications may be made therein without departing from the -10- spirit of the invention and within the scope and range of e~ui-valents of the claims.
Brief DescriPt-ion of the Drawings T.he invention, however, together with additional objects and advantages thereof will be best understood from the following description when read in connection with the accompanying drawings, in ~hich:
FIG. 1 diagrammatically illustrates in a slde view the safety belt roll-up device showing release mechanism control disk, and locking means, -20-FIG. 2 is a partial cross section of the safety belt roll-up device taken along line II-II of FIG. 1, FIGS. 3 and 4 illustrate a first embodiment of the control disk of the safety belt roll-up device according to the invention in two different positions of operation, i.e. in normal position ~ Z~3 and activated position, i FIG. 5 is a sectional view of the control disk taken along line III-III of FIG. 3, FIG. 6 is a variant of FIG. 5, FIGS. 7 and 8 illustrate a second embodiment of the control disk of the safety belt roll-up device according to the invention in two different positions of operation, FIG. 9 schematically shows a third embodiment of the control disk, -10- FIGS. 10 and 11 schematically illustrate a fourth and fi~th embodiment of the control disk, and , ~IG. 12 shows the loop from FIG. 11 in detail.
Detailed Description of Invention Accordin~ to the invention, the control disk is associated co-axially with a cam which is rotatable relative to the control disk.
The cam has an actuating dog for the locking device and is held in a predetermined starting position relative to the control dis~
by at least one spring and can be deflected resiliently in opposite directions of rotation relative to the control disk. In this manner, a single type of roll-up device can be used for right--20- and left-hand installation, since the control disks can be de-~ flected resiliently in both possible directions of rotation and,; when released, automatically returns to the starting position.
In an embodiment of the safety belt roll-up device according to the invention, which is particularly simple as far as assembly is concerned and saves space, the cam is mounted freely rotatably _4_ i ~1229~9 on a bearing hub Or the control disk and ls axially secured by a stop, preferably by a resilient pro,jection which can be hooked ; into a concentric circular slot in the hub. In this manner, the cam can be snapped onto the bearing hub of the control disk with-out effort in the assembly, so that no separate stop elements are required for securing same in the axial direction.
According to a further embodiment of the invention, the control disk and the cam are provided with recesses which face each - other and together form one or several coaxial and arc-shaped -10- receiving channels LOr the springs. Radially or axially aligned stops of the control disk and the cam are provided in the ~icinity ol the channels. The stops are held in the alignment or starting position by spring force.
. j The radially aligned stops of the control disk and the cam are preferably tensioned against each other by the free, projecting spring legs of a loop spring mounted on an axial hub part. This solution permits particularly large control distances.
In FIGS. 1 and 2, the housing 1 of a safety belt roll-up device made of a stable material, consists basically of two side plates -20- 2 and a cross piece 3. Rotatably mounted in the side plates 2, of which only one is shown in the figures, is the belt shaft 4 which projects beyond the side plate 2 and has a planar radial end shoulder 5 as well as a thin cylindrical journal pin 6. The safety belt wound on the belt shaft 4 is designated by numeral 7.
~astened to the outside surface of the side plate 2 is a ratchet ~iz~
gear 9 with internal ratchet teeth 10. A two-arm rat¢het pawl - 11 on a bearing pin 12 is pivoted eccentrically to the belt shaft at the end ~ace extension 5 of the belt shaft 4. In FIG. 1 the upper locking edge of this ratchet pawl 11 is pushed by a spring 13 toward the belt shaft. For the sake of clarity, a control disk 14 is shown only dashed in FIG. 1 and an inertial disk 15 connected to the ~ontrol disk is not shown. The inertial disk 15 (FIG. 2) has a bearing extension 16 with a bearing hole. The bearing extension 16 carries integrally therewith a control dog -10- 18. The-control disk 14 provided with a corresponding bearing opening can be pushe~ with a positive engagement onto the bearing extension 16 and the control dog 18. The unit of control disk 14/
; inertial disk 15 is rotatably mounted relative to the belt shaft 4 on the journal pin 6 of the belt shaft 4. The control disk 14 has radial, narrow control teeth 20 which agree as to pitch and number of teeth with the ratchet teeth 10. A release mechanism designated generally by numeral 21 is in the form o~ a so-called ball sensor, consisting of a base plate 22 fastened to the hous-ing o~ the automatic device, with a centering hole 23, a ball -20- 24 and a tiltable control lever 25 lightly supported on the ball 24. The release mechanism 21 is ac~uated in the event of an excessive deceleration o~ the vehicle. Then, the ball 24 moves outside the area of the centering hole 23 with the result that the control lever 25 is pushed upward. This stops the control disk 14. The sa~ety belt 7 is unwound slightly until the control dog 18 runs up on the inside surface o~ the ratchet pawl 11 due to .
li22~4~
¦ the relati~e motion between the belt shart 4 and the control¦ disk 14. The ratchet pawl 11 theb pushes against the ratchet teeth 10.
In the following, control disks which are different from the control disk according to FIGS. l and 2 are explained.
- , In ~he embodiment example according to FIGS. 3, 4 and ~, the con-trol unit 30 has a ~lat control disk 32 with control teeth 31 -arranged at its outer circum~erence and also has a bearing hub 33 with a concentric circular groove 34 as well as a collar 35.
-10- A circular recess 36 is provided in part of the collar 35. As clearly shown in FIGS. 3 and 5, a flat cam 37 is mounted freely rotatably on the bearing hub 33. This cam 37 has a resilient projection 38 which can be hooked resiliently into the concentric circular groove 34 when the cam is placed on the bearing hub, thereby axially securing the cam. The cam 37, similar to the control disk 32, also has a circular-arc-shaped recess 39. The recesses 36, 39 o~ the control disk and the cam, radially of~set from each other, form a closed receiving channel 36/39 for a compression spring 40. The shoulders of the recesses 36 and 39, -20- terminating the circular arc of the receiving channel at both ends, form radially aligned stops 41~ 42 and 43, 44, which are tensioned against each other by the two ends of the spring 40 contained in the receiving channel 36/39. When the release mechanism 21 becomes eifective and gets into the blocking position, it locks the control disk 32 by contact at the control teeth 31 i llZZ949 ! The initial or starting position is shown in FIG. 3, while in FIG. 4 that position is shown in which some belt 7 wa unwound fr~m shaft 4 and the blocking of the automatic device, i.e., the blocking of the belt shaft 4, completed. It is seen clearly that in this process the stops 41 and 42, 43 and 44 of the control disk and the cam have shifted clockwi~ relative to each other by the angle a. With the release of the control unit 30, i.e. it - ~ is no longer activated by release mechanism 21, the tensioned spring 40 again brings the corresponding stops into alignment -10- (starting position). While the control unit 30 was being actu-ated, the ratchet pawl designated with 11 in FIGS. 1 and 2 was moved into the locking position by means of the control dog 46 o~ the cam 37. The ~igures also clearly show that due to the particular manner of arranging the spring 40, a deflection of ! the cam 37 counterclockwise is also possible. Thereafter, upon release, the stops get into mutual alignment again.
The embodiment example according to FIG. 6 dif~ers ~rom the embodiment example according to FIGS. 3 to 6 in that the control disk 32' and cam 37' are provided with ~xially opening recesses -20- 36' and 39' as well as with axially aligned stops Ior the spring 40'.
In the embodiment example according to FIGS. 7 and 8, there is located, on both sides o~ each of th0 stops 47 and 48 of the con-~ trol disk 49 and the cam ~0, a circular-arc-shaped receiving , channel 51 and channel 52 for receiv~ng a spring 53 each. The _~_ I
~Z~49 springs ~3 are braced against the radially aligned stops 47~
48 as well as at the other end against the corresponding shoulders 54 defining the receiving channels, of the cam ~0. Here, too, a relative motion of the control disk and the cam, for instance, by the angle a clockwise as well as counterclockwise is possible, as shown in FIG. 8. The stops 47 and 48 are pushed back into their alignment or starting position aIter the load ceases.
In the embodiment example according to FIG. 9, annular recesses ~re provided in the control disk 55 and the cam 56, which form an annular receiving channel 57 of the control disk 55 and the cam 56, with the exception of the stops 58, 59, arranged in the area of the receiving channel 57 and radially aligned with each other. Tbe spring end~ of a single spring 60, bent in the form of a ring, are braced against these stops.
In the embodiment example according to FIG. 10~ a control disk 61 has a stop 63 which projects into a recessed cavity 62, while the cam 64 which is coaxial with the control disk 61 and cooper-ates therewith, has a stop 65 facing the stop 63. Mounted on a hub part or on the outer circumference o~ the cam 64 is a formed spring 66 with two radially projecting ~ree spring legs 66' and 66", which are braced against the radially aligned stops 63 and 65 and tension them against each other. Here too, -a relative motion in both directions of rotation is possible, the dash-dotted lines indicating the actuated position of the cam a~ter a relative motion.
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1~1229~9 !
In the embodiment example according to FIGS. 11 and 12, a loop spring 67, shown as a detail in FIG. 12, is molmted on a hub part of the cam 68 with several spring turns instead of the formed spring according to FIG. 10. The freely projecting spring legs 67l and 67" tension the stops 69 and 70 of the cam 68 and the control disk 71 against each other. Here, too, the deflected position of the cam 63 or the stop 70 of the cam 68 is indicat-d.
, .
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Safety belt roll-up device with belt shaft blocking means having a frame, a rotatable belt shaft on which a belt is wound mounted in the frame, blocking means with stationary locking teeth and a locking pawl, said pawl being movable to engage the stationary locking teeth for block-ing the belt shaft, a control disk with control teeth for activating said blocking means to effect blocking of the belt shaft, said disk freely rotatable relative to the belt shaft, a release mechanism which is tri-ggered when the vehicle exceeds a permissible acceleration or deceleration, for impeding rotation of the control disk by contact with said control teeth, a cam mounted coaxially with the control disk with the cam rotat-able relative to the control disk in opposite directions of rotation, stop means to permit only a part turn of the cam in either direction of rota-tion relative to the control disk, said cam having an actuating dog for activating the blocking means by contacting said locking pawl when the cam and disk rotate at a speed different from the shaft causing the pawl to move into engagement with the locking teeth, and said dog held in a pre-determined starting position relative to the control disk by at least one spring which can be deflected resiliently relative to the control disk in opposite directions of rotation.
2. Safety belt roll-up device according to claim 1, wherein the cam is mounted freely rotatably on a bearing hub of the control disk and is axially secured by a stop element.
3. Safety belt roll-up device according to claim 2, wherein the stop element is a resilient projection which can be hooked into a concentric circular slot in the hub.
4. Safety belt roll-up device according to claim 1, wherein the control disk and the cam are provided with recesses facing each other and together forming a coaxial and arc-shaped re-ceiving channel for a spring,radially or axially aligned stops for the control disk and the cam, said control disk and cam held in the aligned or starting position by the spring force.
5. Safety belt roll-up device according to claim 4, wherein the recesses of the control disk and the cam facing each other radi-ally or axially together form a circular-arc-shaped receiving channel, and wherein shoulders terminating the arc at both ends form the radially or axially aligned stops which are tensioned against each other by a spring contained in the receiving channel.
6. Safety belt roll-up device according to claim 4, wherein a circular-arc shaped receiving channel is provided on both sides of each stop of the control disk and cam for receiving two springs, which springs are braced resiliently against the stops with the spring ends facing each other.
7. Safety belt roll-up device according to claim 4, wherein the recess is a concentric, annular receiving channel with a stop of the control disk and the cam in the area of the channel, against which stop the spring ends of a single spring are braced.
8. Safety belt roll-up device according to claim 2, wherein radially aligned stops of the control disk and the cam are tensioned against each other by a formed spring mounted on an axial hub part.
9. Safety belt roll up device according to claim 2, wherein radially aligned stops of the control disk and the cam are tensioned against each other by free projecting spring legs of a loop spring which is mounted with several spring turns on an axial hub part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2832822.5 | 1978-07-26 | ||
| DE2832822A DE2832822C2 (en) | 1978-07-26 | 1978-07-26 | Seat belt retractors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1122949A true CA1122949A (en) | 1982-05-04 |
Family
ID=6045438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA332,621A Expired CA1122949A (en) | 1978-07-26 | 1979-07-26 | Safety belt roll-up device |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS5921625B2 (en) |
| AU (1) | AU531359B2 (en) |
| BR (1) | BR7904769A (en) |
| CA (1) | CA1122949A (en) |
| DE (1) | DE2832822C2 (en) |
| ES (1) | ES8203618A1 (en) |
| FR (1) | FR2433953A1 (en) |
| GB (1) | GB2026308A (en) |
| IT (1) | IT1122333B (en) |
| SE (1) | SE444153B (en) |
| ZA (1) | ZA793810B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3009701A1 (en) * | 1980-03-13 | 1981-09-17 | Repa Feinstanzwerk Gmbh, 7071 Alfdorf | REELING MACHINE FOR A BELT |
| DE3011283C2 (en) * | 1980-03-24 | 1986-11-27 | TRW Repa GmbH, 7077 Alfdorf | Seat belt retractors |
| SE449722B (en) * | 1980-06-02 | 1987-05-18 | Takata Kojyo Co | EMERGENCY WELDING ROLLER FOR VEHICLE SEAT BELTS |
| US4632331A (en) * | 1985-08-19 | 1986-12-30 | Trw Canada Limited | Retractor assembly |
| GB2216775C (en) * | 1988-03-29 | 1994-11-25 | Trw Repa Gmbh | A belt retractor for a motor vehicle safety belt restraining system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2408458A1 (en) * | 1973-03-16 | 1974-09-26 | Sigmatex Ag | EMERGENCY LOCK RETRACTOR |
| JPS5420733B2 (en) * | 1973-06-21 | 1979-07-25 | ||
| IT1055652B (en) * | 1974-12-02 | 1982-01-11 | Peugeot Aciers Et Outillage | WRAPPING BELT FOR SAFETY BELTS |
| SE7416264L (en) * | 1974-12-23 | 1976-06-24 | Graenges Essem Ab | LOCK DEVICE FOR VEHICLE SEAT BELTS |
| FR2319389A1 (en) * | 1975-07-31 | 1977-02-25 | Peugeot Aciers Et Outillage | RETRACTOR DEVICE FOR SAFETY STRAP |
| JPS5271022A (en) * | 1975-12-09 | 1977-06-14 | Susumu Ubukata | Emergency lock type seattbelt winding apparatus |
| GB1533937A (en) * | 1976-10-18 | 1978-11-29 | American Safety Equip | Friction clutch operated dual tension safety belt retraction means |
-
1978
- 1978-07-26 DE DE2832822A patent/DE2832822C2/en not_active Expired
-
1979
- 1979-07-17 FR FR7918489A patent/FR2433953A1/en active Granted
- 1979-07-19 GB GB7925149A patent/GB2026308A/en not_active Withdrawn
- 1979-07-20 AU AU49112/79A patent/AU531359B2/en not_active Expired
- 1979-07-20 SE SE7906240A patent/SE444153B/en unknown
- 1979-07-25 IT IT24642/79A patent/IT1122333B/en active
- 1979-07-25 BR BR7904769A patent/BR7904769A/en not_active IP Right Cessation
- 1979-07-25 ZA ZA00793810A patent/ZA793810B/en unknown
- 1979-07-26 ES ES482872A patent/ES8203618A1/en not_active Expired
- 1979-07-26 CA CA332,621A patent/CA1122949A/en not_active Expired
- 1979-07-26 JP JP54094312A patent/JPS5921625B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5921625B2 (en) | 1984-05-21 |
| BR7904769A (en) | 1980-04-22 |
| ZA793810B (en) | 1980-07-30 |
| ES482872A0 (en) | 1982-04-16 |
| DE2832822A1 (en) | 1980-02-07 |
| FR2433953B1 (en) | 1984-07-06 |
| GB2026308A (en) | 1980-02-06 |
| ES8203618A1 (en) | 1982-04-16 |
| AU531359B2 (en) | 1983-08-18 |
| JPS5526995A (en) | 1980-02-26 |
| DE2832822C2 (en) | 1983-12-01 |
| AU4911279A (en) | 1980-01-31 |
| IT1122333B (en) | 1986-04-23 |
| SE7906240L (en) | 1980-01-27 |
| IT7924642A0 (en) | 1979-07-25 |
| FR2433953A1 (en) | 1980-03-21 |
| SE444153B (en) | 1986-03-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |