WO2013073568A1 - シートベルト装置 - Google Patents
シートベルト装置 Download PDFInfo
- Publication number
- WO2013073568A1 WO2013073568A1 PCT/JP2012/079499 JP2012079499W WO2013073568A1 WO 2013073568 A1 WO2013073568 A1 WO 2013073568A1 JP 2012079499 W JP2012079499 W JP 2012079499W WO 2013073568 A1 WO2013073568 A1 WO 2013073568A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cable
- rotation
- seat belt
- seat back
- seat
- Prior art date
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Classifications
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- 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
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- 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
- B60R22/18—Anchoring devices
- B60R22/26—Anchoring devices secured to the seat
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- 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
- B60R22/40—Belt retractors, e.g. reels self-locking in an emergency responsive only to vehicle movement
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- 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
- B60R22/18—Anchoring devices
- B60R22/26—Anchoring devices secured to the seat
- B60R2022/263—Front seats
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- 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
- B60R22/40—Belt retractors, e.g. reels self-locking in an emergency responsive only to vehicle movement
- B60R2022/401—Belt retractors, e.g. reels self-locking in an emergency responsive only to vehicle movement with adjustable sensor
- B60R2022/402—Belt retractors, e.g. reels self-locking in an emergency responsive only to vehicle movement with adjustable sensor automatically adjustable to keep a vertical position, e.g. irrespective of seat or vehicle tilting
- B60R2022/403—Belt retractors, e.g. reels self-locking in an emergency responsive only to vehicle movement with adjustable sensor automatically adjustable to keep a vertical position, e.g. irrespective of seat or vehicle tilting using externally controlled means, e.g. linked with seat back hinge
Definitions
- the present invention relates to a seat belt device for protecting a passenger in a vehicle, and more particularly to a seat belt device in which a seat belt retractor is incorporated in a seat back of a reclining seat.
- the seat belt device mounted on the vehicle is for protecting an occupant in the event of a vehicle collision by restraining the occupant seated on the seat with a seat belt pulled out from the seat belt retractor.
- the seat belt retractor detects the acceleration with an acceleration sensor when the acceleration in the horizontal direction is applied in the horizontal direction at the time of a vehicle collision, etc., and activates the seat belt locking mechanism, which prevents the seat belt from being pulled out.
- an inertial body used for an acceleration sensor one using a ball or one using a self-supporting inertial body is known.
- Patent Documents 1 to 3 describe a seat belt device in which a cable is advanced and retracted by a length corresponding to a tilt angle of a seat back at a connecting portion between a seat back support arm protruding from a seat cushion and a reclining rotation shaft.
- An advancing / retracting mechanism is installed, and when the seat back tilts back and forth, the sensor reference line of the acceleration sensor is controlled so that it always points in the vertical direction by a cable that runs between the cable advancing / retreating mechanism and the seat belt retractor.
- acceleration can be detected properly.
- the mounting angle of the seat belt retractor with respect to the seat back in the vehicle width direction (vehicle left-right direction) varies depending on the vehicle type, vehicle seat specifications, etc., in order to ensure a smooth pull-out of the seat belt.
- the seat belt device described in Patent Document 4 can adjust the attitude of the acceleration sensor in the vertical direction in response to not only the vehicle front-rear direction but also the mounting angle change in the vehicle width direction.
- the seat belt device described in Patent Document 4 can cope with a change in the mounting angle in the vehicle width direction by fixing the rotation position of the inertial sensor by laser welding or joining. Not disclosed.
- the rotational position of the inertial sensor is fixed at different angles depending on the seat specifications.Therefore, in order to ensure that the orientation of the acceleration sensor is always in the vertical direction, a dedicated component that matches the mounting angle of the seatbelt retractor is required. Necessary. However, it is not preferable to design, manufacture, and stock a large number of dedicated parts according to various specifications, which increases costs.
- a rack and pinion system As a cable advancing / retracting mechanism, a rack and pinion system is known in which a rack and a pinion are combined and the rotation of the pinion synchronized with the tilt of the seat back is converted into a cable advancing / retreating operation via the rack.
- a cam member which is called a slider in Patent Document 3 but also called a pulley in some cases
- a direct system that advances and retracts the cable by changing the winding length of the cable on the cam member according to the relative rotation with the member is adopted.
- the direct cable advance / retreat mechanism includes a casing member (referred to as a case in Patent Document 3) that is fixed to the seat back and tilts integrally with the seat back, and a lever that is fixed to the seat cushion.
- a member called a seat seat side plate in Patent Document 3
- a cam member that rotates relative to the tilting casing member.
- the cable introduction part of the casing member is provided with a terminal fixing part of the outer tube that holds the cable slidably, and the terminal part of the cable drawn out from the terminal part of the outer tube and wound around the winding groove of the cam member is a cam. It is fixed to the member.
- a cable length adjustment mechanism that adjusts the length (protrusion allowance) of the cable drawn from the terminal portion of the outer tube is provided in the terminal fixing portion of the outer tube provided in the casing member. .
- the cable (inner cable) stored in the outer tube is extended (the length of the cable drawn from the outer tube terminal). )) Can be adjusted.
- the cable length adjusting mechanism is provided on the casing member, so that the front side of the cam member that actually detects the rotation angle ( That is, the cable length is adjusted in the middle of the cable). Accordingly, there is a possibility that a slight play of the cable may remain between the cable end portion, and accordingly, the detection accuracy of the rotation angle is deteriorated, the attitude control accuracy of the acceleration sensor is lowered, and the acceleration is reduced. There was a possibility that the detection accuracy of the sensor would decrease. Further, if the cable length adjusting mechanism is provided in the casing member which is the exterior component, the compactness of the outer shape of the cable advancing / retreating mechanism may be impaired accordingly.
- the present invention has been made in view of the above-described problems, and the object thereof is to improve the accuracy of the acceleration sensor by maintaining the sensor reference plane with high accuracy even at an arbitrary seat back tilt angle.
- An object of the present invention is to provide a seat belt device that can be realized.
- a seat belt retractor that is attached to a reclining seat back and winds up the seat belt when necessary;
- a cable is provided at a connecting portion between a seat back and a seat cushion of the reclining seat, detects a tilt angle when the seat back tilts in the vehicle front-rear direction, and transmits the tilt angle to the seat belt retractor.
- a seat belt device comprising:
- the seat belt retractor is A retractor frame that is fixed to the seat back by inclining in the left-right direction of the vehicle with respect to a straight line extending in the up-down direction at the center in the left-right direction of the seat back;
- a spindle supported by the retractor frame and for winding the seat belt;
- An acceleration sensor attached to the retractor frame for detecting acceleration in the longitudinal direction of the vehicle;
- a lock mechanism that locks the pull-out operation of the seat belt in accordance with the vehicle longitudinal acceleration detected by the acceleration sensor;
- a posture control mechanism for keeping the sensor reference plane of the acceleration sensor horizontal;
- Have The acceleration sensor is A sensor cover fixed to the retractor frame;
- An inertial body that moves in the longitudinal direction of the vehicle when an acceleration of a predetermined value or more acts in the longitudinal direction of the vehicle;
- a sensor housing having an oscillating shaft along the left-right direction
- Compensating means for compensating for a rotational angle deviation caused by non-parallel rotation of the two rotating raceway surfaces when transmitting the rotation from the rotating member to the sensor housing by the rotation transmitting mechanism includes the cable advance / retreat mechanism.
- the seat belt device is provided between the position control mechanism and the posture control mechanism.
- the posture control mechanism is provided with a pulley that converts the forward / backward movement of the cable into a rotational motion and transmits the rotation to the rotating member, and the cable winding portion of the pulley is formed in a spline curve shape.
- the winding radius of the cable is set to change according to the rotation angle of the pulley
- the cable advancing / retracting mechanism is provided with a cam member that winds or pulls the cable according to rotation to advance and retract the cable by a distance corresponding to the inclination angle of the seat back.
- the winding radius of the cable is set to change according to the rotation angle of the cam member
- the rotation transmission mechanism includes a pin and a slit that are provided on the rotation member and the sensor housing, respectively, and are disposed at positions separated from the swinging shaft and the rotation shaft in the radial direction to engage with each other.
- the seat belt device characterized in that: (5) a seat belt retractor that is attached to a reclining seat back and winds up the seat belt when necessary; A cable is provided at a connecting portion between a seat back and a seat cushion of the reclining seat, detects a tilt angle when the seat back tilts in the vehicle front-rear direction, and transmits the tilt angle to the seat belt retractor.
- a seat belt device comprising:
- the seat belt retractor is A retractor frame that is fixed to the seat back by inclining in the left-right direction of the vehicle with respect to a straight line extending in the up-down direction at the center in the left-right direction of the seat back;
- a spindle supported by the retractor frame and for winding the seat belt;
- An acceleration sensor attached to the retractor frame for detecting acceleration in the longitudinal direction of the vehicle;
- a lock mechanism that locks the pull-out operation of the seat belt in accordance with the vehicle longitudinal acceleration detected by the acceleration sensor;
- a posture control mechanism for keeping the sensor reference plane of the acceleration sensor horizontal;
- Have The acceleration sensor is A sensor cover fixed to the retractor frame;
- An inertial body that moves in the longitudinal direction of the vehicle when an acceleration of a predetermined value or more acts in the longitudinal direction of the vehicle;
- a sensor housing having an oscillating shaft along the left-right direction
- a seat belt device provided between the two.
- the cable winding portion of the pulley is formed in a spline curve shape, so that the cable winding radius is set to change according to the rotation angle of the pulley,
- the cable advancing / retracting mechanism is provided with a cam member that winds or pulls the cable according to rotation to advance and retract the cable by a distance corresponding to the inclination angle of the seat back.
- the winding radius of the cable is set to change according to the rotation angle of the cam member,
- the posture control mechanism is A rotating member that rotates in synchronism with the rotation of the pulley and rotates an angle corresponding to the distance of forward or backward movement of the cable by the cable advance / retreat mechanism;
- a rotation transmission mechanism that transmits the rotation of the rotating member to the sensor housing, and swings the sensor housing in the vehicle front-rear direction;
- the sensor cover is provided separately from the posture control mechanism,
- the rotation shaft of the rotating member and the swing shaft of the sensor housing form a predetermined angle with respect to the vehicle left-right direction so that the swing shaft of the sensor housing is installed in a horizontal direction with respect to the vehicle left-right direction.
- the seat belt device according to any one of (5) to (7), wherein the sensor cover is formed so as to intersect with the sensor cover.
- the rotation transmission mechanism includes a pin and a slit that are provided on the rotation member and the sensor housing, respectively, and are arranged in positions radially away from the swing shaft and the rotation shaft and engage with each other.
- the seat belt device according to (8).
- the cable advancing / retreating mechanism is A lever member fixed to the seat cushion; A casing member that is arranged coaxially with the center of rotation of the seat back so as to be rotatable with respect to the lever member, and is fixed to the seat back and rotates with the tilt of the seat back; As long as the seat back tilt angle is within a predetermined range, it is provided coaxially with the pivot center of the seat back and pivotable with respect to the lever member and the casing member.
- a cam member that is prevented from moving by the lever member when the casing member rotates;
- the casing member is provided with an outer tube terminal fixing portion for fixing the terminal portion of the outer tube that slidably holds the cable
- the cam member is provided with a cable winding groove for winding a cable formed along the outer peripheral surface of the cam member and drawn from the end portion of the outer tube,
- a cable adjuster having a cable end fixing portion for fixing the end portion of the cable wound in the cable winding groove, and linearly slidably mounted on an outer peripheral portion of the cam member; and the cable adjuster is slid (5) wherein the cam member is provided with a cable length adjusting mechanism having a cable adjuster moving means that adjusts the length of the cable drawn from the terminal portion of the outer tube.
- the seat belt device according to any one of (7) to (7).
- the cable adjuster moving means is A screw receiving wall formed on the cam member; A screw insertion hole formed through the screw receiving wall; A screw hole formed in the end surface of the cable adjuster in the sliding direction; An adjustment screw that is threaded into the screw hole of the cable adjuster by passing the tip end side of the screw shaft portion through the screw insertion hole in a state where the head is received by the screw receiving wall; Contains The seat belt device according to (10), wherein the cable adjuster is displaced via the adjustment screw by a rotation operation of the adjustment screw.
- the cable adjuster moving means is The seat belt device according to (10), further comprising a spring that biases the cable adjuster in a direction in which the cable is pulled out from a terminal portion of the outer tube.
- Each of the lever member, the casing member, and the cam member is provided with positioning holes that pass through the three members when aligned.
- the seatbelt apparatus in any one.
- the cable adjuster is mounted on the outer peripheral portion of the cam member so as to be slidable in a tangential direction of a circle centering on the rotation center of the seat back.
- the seatbelt apparatus in any one.
- up and down indicates the direction when the floor direction and the ceiling direction are viewed from the center of the vehicle
- left or right or left and right direction indicates the vehicle width direction of the vehicle.
- horizontal indicates the horizontal (horizontal direction), and even if it changes slightly from the horizontal, an error that occurs in manufacturing and the effect of the present invention are produced when designing a product. Including the range that can be.
- a “spline curve shape” means that, for example, a circle on the first plane is perpendicular to the second plane from a position above the second plane that is not parallel to the first plane. A curve drawn on the circumference of the circle projected onto the non-parallel second plane when projected is included.
- the detection range of the seat back inclination angle is that the seat back is tilted to the rear side of the vehicle from a state where the seat back has risen to such an extent that a passenger can be seated. It is set so that it can be detected until the status.
- the angle detection part it is also possible to design the angle detection part so that the angle is detected from the state where the seat back is tilted forward to the state where the seat back is tilted backward. It can be arbitrarily set according to
- ⁇ 15 in the left-right direction with respect to the straight line extending in the up-down direction can be set between 0 ° and ⁇ 45 ° in the horizontal direction.
- the predetermined angle is determined by the horizontal direction of the swing axis of the sensor housing. It is determined to be. Basically, the angle is determined by the inclination angle of the vehicle in the left-right direction when the retractor is attached to the seat back. That is, this predetermined angle is set according to the mounting angle of the retractor.
- the rotation track surfaces of both the rotating member or the pulley and the sensor housing when the rotation of the angle according to the inclination angle of the seat back is transmitted from the rotating member or from the pulley to the sensor housing, the rotation track surfaces of both the rotating member or the pulley and the sensor housing. Is non-parallel, the position of the contact point for force transmission changes in the radial direction according to the rotational angle position, and the contact point trajectory becomes non-circular (elliptical).
- a rotational angle deviation occurs between the rotating member and the sensor housing, or between the pulley and the sensor housing, and the inclination angle of the seat back and the rotational angle of the sensor housing are not synchronized.
- the inertia body support surface of the sensor housing is not accurately held horizontally.
- the rotational angle deviation is compensated by compensation means provided between the cable advancing / retreating mechanism and the attitude control mechanism, so that the inclination angle of the seat back and the rotation angle of the sensor housing are accurately determined. It can be synchronized well. Therefore, the inertial body support surface, which is the sensor reference surface, can be kept level with high precision even at an arbitrary seat back tilt angle, and the accuracy of the acceleration sensor can be improved.
- a cable length adjusting mechanism is provided on the outer periphery of the cam member that actually detects the tilt angle of the seat back, and is pulled from the end of the outer tube by pulling and moving the end of the cable with the cable adjuster. Since the cable drawing length (protrusion allowance) is adjusted, the length of the cable can be accurately adjusted so that no slack is generated. Therefore, the advance / retreat accuracy of the cable according to the reclining angle of the seat back is increased, and the performance of the acceleration sensor can be improved. Further, since the cable adjuster is disposed on the outer peripheral portion of the cam member, a compact configuration can be achieved.
- (A) is a side view of a reclining seat provided with a seat belt device according to the present invention
- (b) is a rear view of the left seat of the reclining seat
- (c) is a reclining seat of the reclining seat. It is a rear view of a right seat.
- (A) is sectional drawing which looked at the seatbelt retractor for right seats attached inclining by the predetermined angle (theta) to the left side in the 1st Embodiment of this invention from the vehicle front side
- (b) is a predetermined angle to the right side
- It is sectional drawing which looked at the seatbelt retractor for left seats attached by inclining only (theta) from the vehicle front side. It is a disassembled perspective view of the seatbelt retractor.
- FIG. 6B is a cross-sectional view taken along the line VI-VI in FIG. 5B and shows a state when the seat belt retractor is attached to the right side by a predetermined angle ⁇ .
- A) is a perspective view which shows the structure of the sensor housing used for the seatbelt retractor for left seats
- (b) is a perspective view which shows the structure of the sensor housing used for the seatbelt retractor for right seats.
- (A) is a side view showing that the seat belt retractor is mounted inclined in the vehicle width direction (right direction), and (b) is a rotation track surface of an adjustment gear (rotating member) of the attitude control mechanism.
- trajectory of the pin of an adjustment gear (d) is a figure which shows the movement locus
- (A) is a perspective view of a pulley of a posture control mechanism used for a seatbelt retractor for a left seat
- (b) is a sectional view thereof
- (c) is a sectional view taken along arrow IXc-IXc in (b)
- d) is a perspective view of a pulley of a posture control mechanism used for a seatbelt retractor for a right seat
- (e) is a cross-sectional view thereof
- (f) is a cross-sectional view taken along arrow IXf-IXf in (e).
- (A) is a side view showing the state of the seat belt retractor and the cable advance / retreat mechanism when the seat back is tilted back to 95 °
- (b) is a front view showing the internal state of the cable advance / retreat mechanism at that time.
- (A) is a side view showing the state of the seat belt retractor and the cable advancing / retreating mechanism when the seatback is tilted forward at 75 °
- (b) is a front view showing the internal state of the cable advancing / retreating mechanism at that time. It is explanatory drawing of the method when adjusting the length of a cable in a cable advance / retreat mechanism.
- a seat belt device 10 of the present embodiment is attached to a seat back 16 of a reclining seat 15, and a seat belt retractor 11 that can wind up a seat belt 19,
- a cable (also referred to as an inner cable) 13a is advanced and retracted by a length corresponding to the tilt angle of the seat back 16, which is disposed at a connecting portion 18 that rotatably connects the seat back 16 and the seat cushion 17 of the reclining seat 15.
- a cable advancing / retracting mechanism 100 that transmits the tilting operation of the seat back 16 to the seat belt retractor 11 via the cable 13a.
- the seat belt device 10 has a function of restraining a passenger in the vehicle with respect to the reclining seat 15 at the time of a vehicle collision.
- the cable (inner cable) 13a constitutes a cable unit 13 by being covered with an outer tube 13b (see FIG. 3) to be described later, and the terminal members 13d at both ends of the outer tube 13b are connected to the seat belt retractor 11 and the cable advance / retreat mechanism. It fixes to the casing member 120 (refer FIG. 11) of 100 mentioned later. Thereby, the cable 13a accommodated in the inside of the exterior tube 13b is configured so as to slide smoothly in the extending direction without slack with respect to the exterior tube 13b.
- the seat belt retractor 11 tilts at an arbitrary angle in the longitudinal direction of the vehicle according to the reclining angle of the seat back 16. Further, in the vehicle width direction (the vehicle left-right direction), the seat belt 19 can be smoothly fed out from the seat belt retractor 11 so that the seat belt 19 is attached at different predetermined angles ⁇ depending on the vehicle type and seat specifications.
- the seat belt retractor 11 is fixed to the seat back 16 while being inclined in the left-right direction of the vehicle with respect to a straight line extending in the up-down direction at the center in the left-right direction of the seat back 16.
- a spindle 22 for winding up the seat belt 19 is rotatably supported on the retractor frame 21.
- a retractor spring 23 is connected to one end side in the axial direction of the spindle 22 to rotate and urge the spindle 22 in the winding direction of the seat belt 19, and the retractor spring 23 is accommodated in a cover 23a.
- a steering wheel 25 that is one component of the lock mechanism 24 that locks the pull-out operation of the seat belt 19 and the longitudinal acceleration acting on the vehicle are detected and detected.
- the acceleration sensor 30 that activates the lock mechanism 24 according to the acceleration, and the attitude control mechanism 70 that keeps the sensor reference surface (an inertial body support surface 33 described later) of the acceleration sensor 30 substantially horizontal regardless of the tilt angle of the seat back 16. And are provided.
- the steering wheel 25 is coupled so as to rotate integrally with the spindle 22 and is arranged on the outer peripheral surface at a predetermined interval in the circumferential direction that engages with an upper claw portion 36b of an operating member (first sensor lever 36) described later. It has a plurality of engaging claws 25 a and is housed inside the steering wheel cover 27. Further, the entire side surface on the other end side of the seat belt retractor 11 including the acceleration sensor 30 is covered with a retractor cover 29.
- the acceleration sensor 30 includes a sensor cover 31 fixed to the outer surface of the retractor frame 21 so as to tilt in the vehicle front-rear direction integrally with the seat back 16, and the vehicle left-right direction.
- the vehicle is supported so as to be swingable in the vehicle front-rear direction with respect to the sensor cover 31 about the swing axis L1 (see FIG. 6).
- the sensor housing 32 that holds the inertia body support surface 33 as a sensor reference surface in the vehicle front-rear direction in a substantially horizontal state, and the inertia housing support surface 33 of the sensor housing 32 are supported on the predetermined value.
- An iron ball 35 as an inertial body that is displaced from the neutral position when the acceleration in the vehicle longitudinal direction is applied, and the ball 35 changes in the vehicle longitudinal direction. It has a second sensor lever 37, which is the actuating member for actuating the locking mechanism 24 to the lock side in conjunction upon.
- a pair of boss portions 32 a and 32 b protruding from the outer surface of the sensor housing 32 are fitted in the pair of support holes 31 a and 31 b of the sensor cover 31, respectively.
- the swing shaft L1 is configured, and the sensor housing 32 can swing in the vehicle front-rear direction around the swing shaft L1.
- the pair of rotating protrusions 37a and 37b of the second sensor lever 37 are fitted into the lever support holes 32e and 32f formed in the pair of brackets 32c and 32d of the sensor housing 32, and the first The two-sensor lever 37 is supported so as to be rotatable in the vehicle front-rear direction with respect to the sensor housing 32.
- the sensor housing 32 is provided with an inertial body support surface 33 that is a mortar-shaped concave surface that is recessed downward, on the upper inner bottom surface, and the ball 35 is placed on the inertial body support surface 33.
- the ball 35 which is an inertial body, detects an acceleration acting on the vehicle (that is, the seat belt retractor 11) by being displaced from the neutral position when receiving an acceleration in the vehicle front-rear direction that exceeds a predetermined value.
- the above-described state where the inertial body support surface 33 is substantially horizontal means that the reference surface of the inertial body support surface 33 (for example, the upper surface of the inertial body support surface 33) is substantially horizontal.
- the first sensor lever 36 has a boss portion 36 a having a fitting hole provided in the base end portion, and an upper claw portion 36 b that abuts the steering wheel 25 at the tip end portion and the second sensor.
- the lower claw portion 36 c that contacts the lever 37 is formed in a substantially Y shape.
- the first sensor lever 36 is disposed below the steering wheel 25, and the fitting hole of the boss portion 36a is rotatably fitted to a support shaft (not shown) fixed to the retractor frame 21. .
- the upper claw portion 36b engages with the engagement claw 25a of the steering wheel 25 by rotating upward about the boss portion 36a having the fitting hole, thereby restricting the rotation of the steering wheel 25. Therefore, the lock mechanism 24 is configured by the steering wheel 25 and the first sensor lever 36.
- the second sensor lever 37 includes rotating protrusions 37 a and 37 b formed at the base end portion, a flange portion 37 c formed at the distal end side and covering the upper surface of the ball 35, Rib 37d formed on the upper surface of the portion 37c.
- the rotation protrusions 37a and 37b are rotatably fitted in lever support holes 32e and 32f of the sensor housing 32.
- the flange portion 37c is in contact with the upper side of the ball 35
- the lower claw portion 36c of the first sensor lever 36 is in contact with the upper surface of the rib 37d.
- the first sensor lever 36 and the second sensor lever 37 are set so that the positions of the rotation axes are opposite to each other when viewed from the center of the ball 35 so that the ball 35 rotates in the opposite direction when the ball 35 is displaced. Has been.
- the attitude control mechanism 70 that controls the attitude of the sensor housing 32 in the front-rear direction includes a first pulley case 71 and a first pulley case 71 arranged on the inner side of the side plate of the retractor frame 21.
- the spring 75 and a rotation transmission mechanism 76 that transmits the rotation of the adjustment gear 74 to the sensor housing 32 of the acceleration sensor 30 are configured.
- the pulley 73 is rotatably supported by the first pulley case 71 and the second pulley case 72 around a support shaft 71 c provided in the first pulley case 71.
- the pulley 73 converts the forward / backward movement of the cable (inner cable) 13a by the cable advance / retreat mechanism 100 into a rotational movement, and rotates in the same direction as the tilting direction of the seat back 16 by an angle corresponding to the forward / backward movement of the cable 13a.
- the pulley 73 is provided with a cable winding groove 73b for winding the cable 13a on the outer peripheral surface, and one end (upper end) of the cable 13a is fixed to the pulley 73 via the end block 13c.
- the cable 13a is slidably passed through the outer tube 13b, and a terminal member 13d attached to one end of the outer tube 13b is fixed to the first pulley case 71 and the second pulley case 72.
- the torsion spring 75 urges the pulley 73 to rotate in the winding direction of the cable 13a.
- the adjustment gear 74 is a rotating member that meshes with a gear 73 a formed on the side of the pulley 73 and rotates synchronously at the same rotation angle in the direction opposite to the tilting direction of the seat back 16. As shown in FIG. 6, the adjustment gear 74 has one shaft protrusion 74 a fitted in a support hole 71 a formed in the first pulley case 71, and the other shaft protrusion 74 b having a spherical tip is connected to the first pulley case 71.
- the adjustment gear 74 is supported so as to be rotatable about the rotation axis L2 by being fitted into the spherical hole 32g on the end surface of the boss portion 32b of the sensor housing 32 through the opening window 71b (see FIG. 4). .
- the fitting of the spherical hole 32g and the spherical shaft protrusion 74b causes the rotation shaft L2 of the adjustment gear 74 and the swinging shaft L1 of the sensor housing 32 to have a shaft protrusion 74b even if both axes are in an arbitrary angular relationship. It intersects at one point in the center. That is, the rotation axis L2 and the swing axis L1 of the sensor housing 32 intersect at one point both when they are on the same straight line and when they have a tilted relationship.
- L2 is configured to have an arbitrary inclination.
- the rotation transmission mechanism 76 transmits the rotation of the adjustment gear 74 to the sensor housing 32 regardless of whether the rotation axis L2 of the adjustment gear 74 and the swing axis L1 of the sensor housing 32 are on the same straight line or have an inclination.
- the sensor housing 32 can be swung.
- the rotation transmission mechanism 76 directs the sensor reference line S1 of the acceleration sensor 30 (a line perpendicular to the sensor reference plane passing through the center point of the ball 35 at the neutral position) in the vertical direction in the vehicle longitudinal direction.
- the inertia body support surface 33 as a sensor reference surface perpendicular to the sensor reference line S1 is held substantially horizontally.
- the rotation transmission mechanism 76 in this embodiment is a pin that is formed in the adjustment gear 74 and the sensor housing 32 and is disposed at a position radially away from the swing shaft L1 and the rotation shaft L2 and engages with each other. 74c and the slit 32h are comprised.
- the pin 74c is formed on the adjustment gear 74 side and the slit 32h is formed on the sensor housing 32 side, it may be formed in reverse.
- the slit 32h is formed in an arm 32i that projects downward from the side of the sensor housing 32.
- the arm 32i needs to be able to reliably engage the slit 32h and the pin 74c and not interfere with other portions. Therefore, the sensor housing 32L (32) used for the seat belt retractor for the left seat as shown in FIG. 7A and the sensor housing used for the seat belt retractor for the right seat as shown in FIG. 7B. 32R (32) is slightly different in the shape of the arm 32i.
- the seat belt retractor 11 is attached at different inclination directions and angles in the vehicle width direction depending on the vehicle type and the seat specifications. This is because the inclination of the spindle 22 in the vehicle width direction matches the pull-out direction of the seat belt 19. This is to make it possible.
- the rotation shaft L2 of the adjustment gear 74 is inclined by a predetermined angle ⁇ with respect to the horizontal direction along the lateral direction of the vehicle. Even when the rotation axis L2 of the gear 74 is inclined with respect to the horizontal, the swing axis L1 of the sensor housing 32 of the acceleration sensor 30 is kept substantially horizontal, and the sensor reference line S1 of the acceleration sensor 30 points in the vertical direction. As described above, the sensor cover 31 is prepared for each type for the left and right seats. Therefore, the rotation axis L2 of the adjustment gear 74 inclined with respect to the horizontal and the swing axis L1 of the sensor housing 32 kept horizontal are not on the same straight line, and there is a predetermined angle ⁇ between the two axes. Yes.
- both shafts are not on the same straight line
- the turning shaft L2 of the adjustment gear 74 and the swinging shaft L1 of the sensor housing 32 are mutually connected as described above.
- the two axes are set to have a predetermined angle ⁇ and intersect at one point, and the rotation transmission mechanism 76 is configured by the combination of the pin 74c and the slit 32h. .
- the tilt angle (reclining angle) of the seat back 16 and the rotation angle of the sensor housing 32 need to be accurately synchronized. If the rotation angle of the seat back 16 and the rotation angle of the sensor housing 32 are not accurately synchronized, the inertial support surface 33 is not accurately maintained horizontal, and the acceleration sensor 30 cannot react accurately. .
- the rotation track K1 of the slit 32h of the sensor housing 32 becomes a perfect circle when viewed from the horizontal direction perpendicular to the rotation track surface (vertical surface) of the sensor housing 32.
- the rotation track K2 of the pin 74c of the adjustment gear 74 becomes a perfect circle when viewed from the horizontal direction perpendicular to the rotation track surface (vertical surface) of the adjustment gear 74 as shown in FIG.
- an ellipse is seen from the horizontal direction perpendicular to the rotational orbital surface (vertical surface) of the sensor housing 32.
- the position of the contact point changes in the radial direction according to the rotation angle, and the contact point trajectory deviates from a perfect circle as shown in FIG. 8E, and matches the trajectory of the non-circular (elliptical pin 74c).
- a rotational angle shift occurs between the adjustment gear 74 and the sensor housing 32.
- the sensor housing 32 may be rotated by 58 ° or 62 °. Then, the inclination angle of the seat back 16 and the rotation angle of the sensor housing 32 are not synchronized, and the inertia body support surface 33 of the sensor housing 32 is not accurately held horizontally.
- compensation means for compensating for such a rotational angle deviation is provided between the cable advance / retreat mechanism 100 and the attitude control mechanism 70. Then, the inclination angle of the seat back 16 is transmitted to the sensor housing 32 while correcting only the angle that allows for the rotational angle deviation. As a result, the sensor housing 32 is rotated in a state in which the rotational angle deviation is compensated, so that the sensor housing 32 can be rotated so as to be substantially synchronized with the inclination angle of the seat back 16.
- the compensation means is provided in the pulley 73 of the attitude control mechanism 70. That is, the attitude control mechanism 70 is provided with a pulley 73 that converts the forward / backward movement of the cable 13a into a rotational motion and transmits the rotation to the adjustment gear 74, and the circumferential path of the cable winding groove 73b of the pulley 73 is provided.
- the radius r of the cable winding groove 73b is set to change according to the rotation angle of the pulley 73.
- the compensating means is constituted by the cable winding groove 73b having a radius of the pulley 73 formed in the shape of the spline curve.
- FIGS. 9A to 9C are configuration diagrams of pulleys (referred to as “L15 ° pulleys” for convenience) used in the seat belt retractor for the left seat, and FIGS. 9D to 9F are seat belt retractors for the right seat.
- FIG. 6 is a configuration diagram of a pulley (referred to as “R15 ° pulley” for convenience) used in the embodiment.
- FIG. 10 is a diagram showing the profile of the cable winding groove 73b (change in radius r from the rotation center) of the L15 ° pulley 73L and the R15 ° pulley 73R in comparison with a perfect circle pulley.
- the radius r of the cable winding groove 73b is determined by a profile that can compensate for the rotational angle deviation between the adjustment gear 74 and the sensor housing 32. Therefore, by incorporating these pulleys 73L and 73R into the attitude control mechanism 70, the inclination angle of the seat back 16 and the rotation angle of the sensor housing 32 can be accurately synchronized, and the inertia body support surface 33, which is the sensor reference surface. Thus, even at an arbitrary seat back tilt angle, it can be kept horizontal with high accuracy, and the accuracy of the acceleration sensor 30 can be improved.
- the cable advance / retreat mechanism 100 As shown in FIGS. 11 and 12, the cable advance / retreat mechanism 100 is rotatably accommodated in the lever member 110, the casing member 120, the cover 130 that closes the opening surface of the casing member 120, and the casing member 120. And a cable length adjusting mechanism 200 including a cable adjuster 150 and a cable adjuster moving means 201.
- the lever member 110 includes an arm 113 that extends in the rotational radius direction of the casing member 120, and a ring portion 111 that is integrated with a base end portion of the arm 113 and has a circular hole 112 that is coaxial with the rotational center of the seat back 16 at the center. And a stopper projection 116 protruding in the axial direction on the side surface of the ring portion 111.
- the lever member 110 is fixed to the seat cushion 17 by the distal end portion 114 of the arm 113.
- the casing member 120 includes an annular outer peripheral wall 121 that covers the periphery of the cam member 140, and a cylindrical boss portion 123 that is formed inside the outer peripheral wall 121 via an annular recess 122.
- the cable introduction part 126 which protrudes outside is provided in the part.
- the cable introduction portion 126 is provided with cable guide grooves 127 a and 127 b extending in the tangential direction of the annular recess 122.
- the outer cable guide groove 127a is formed to have a size (large groove width) into which the end of the outer tube 13b of the cable unit 13 and the terminal member 13d attached to the end can be inserted.
- the inner cable guide groove 127b It is formed in such a size (small groove width) that only the cable 13a drawn from the end of the tube 13b can be inserted.
- the outer cable guide groove 127a is provided with an outer tube terminal fixing portion 128 that positions and fixes the terminal member 13d of the outer tube 13b.
- the cam member 140 abuts one end 143a of the cam portion 143 of the cam member 140, which will be described later, on the inner periphery of the outer peripheral wall 121 of the casing member 120.
- An abutting step portion 129 that rotates the member 140 in the same direction is provided.
- the casing member 120 is fixed to the seat back 16 together with the cover 130 in a state in which the boss portion 123 is positioned at a connecting portion 18 (see FIG. 1) that rotatably connects the seat cushion 17 and the seat back 16. . Further, by fitting the boss portion 123 of the casing member 120 into the circular hole 112 of the lever member 110, the casing member 120 rotates about the boss portion 123 with respect to the lever member 110 coaxially with the rotation center of the seat back 16. It is connected so that it can move and rotates as the seat back 16 tilts.
- the cam member 140 is provided so as to be rotatable with respect to the lever member 110 and the casing member 120 coaxially with the center of rotation of the seat back 16, and the cable 13a is wound or pulled out according to the rotation to pull the cable 13a into the seat.
- the distance corresponding to the inclination angle of the back 16 is advanced or retracted.
- the cam member 140 is rotated when the casing member 120 rotates with the tilt of the seat back 16. The movement is prevented by hitting a stopper projection 116 of the lever member 110 described later.
- the cam member 140 forms a circular hole 142 in the center of the ring portion 141, forms a fan-shaped cam portion 143 on a part of the outer peripheral portion of the ring portion 141 in the circumferential direction, and forms an outer peripheral surface of the cam portion 143.
- a cable winding groove 144 is formed along an arc centered on the rotation center of the cam member 140.
- the cam member 140 is accommodated in the annular recess 122 of the casing member 120 by being fitted to the boss portion 123 of the casing member 120 so as to be rotatable.
- the one end 143a in the circumferential direction of the fan-shaped cam portion 143 is a portion that contacts the stopper projection 116 of the lever member 110, and the cam member 140 rotates in the direction of arrow Y1 in FIG. The movement is blocked.
- the boss portion 123 of the casing member 120 is provided with a flexible claw 124 that prevents the ring portion 111 of the lever member 110 and the ring portion 141 of the cam member 140 from being detached when fitted.
- the lever member 110, the cam member 140, and the casing member 120 have positioning holes 115, 145, which penetrate the three members 110, 140, 120 when the seat back 16 is aligned with each other in the standard position. 125 is provided.
- an adjuster accommodating recess 149 is provided adjacent to the other end 143b of the fan-shaped cam portion 143 at a part in the circumferential direction of the ring portion 141 of the cam member 140.
- the adjuster accommodating recess 149 is provided with a cable.
- a cable adjuster 150 constituting the length adjusting mechanism 200 is accommodated.
- the cable adjuster 150 fixes the terminal portion on the base end (lower end) side of the cable 13 a with the distal end (upper end) wound around the pulley 73 (see FIGS. 4 and 6) of the attitude control mechanism 70 to the cam member 140.
- the length of the cable 13a is adjusted by pulling the cable 13a so that there is no slack.
- the cable adjuster 150 includes a small piece having a substantially rectangular parallelepiped shape as the adjuster main body 151.
- the adjuster main body 151 is mounted on the cam member 140 so as to be linearly slidable in a tangential direction of a circle around the rotation center of the cam member 140 (rotation center of the seat back 16).
- a C-shaped guide rail 152 is provided on the inner side surface of the adjuster main body 151 and fits into a guide rail 146 having a T-shaped cross section formed at the bottom of the adjuster receiving recess 149 of the cam member 140. .
- the T-shaped guide rail 146 and the C-shaped guide rail 152 are fitted by utilizing the elasticity of a resin material that is a molding material, and guide the cable adjuster 150 to slide in the tangential direction.
- the guide rail 146 having a T-shaped cross section may be provided on the adjuster body 151 side, and the C-shaped guide rail 152 may be provided on the cam member 140 side.
- the adjuster main body 151 may be linearly slid with respect to the tangential direction of the circle, or may be slid linearly other than the tangential direction of the circle.
- the end block 13c attached to the end of the cable 13a in a state of being wound around the cable winding groove 144 is accommodated on one end side of the adjuster body 151 in the sliding direction (side closer to the other end 143b of the cam portion 143).
- a cable terminal fixing part 154 for fixing the terminal part of the cable 13a is provided.
- the cable terminal fixing portion 154 is constituted by a recess, and is provided at the back end of the cable guide groove 153 that accommodates the cable 13a.
- a portion in the vicinity of the end of the cable 13a drawn from the end portion of the outer tube 13b is wound about a quarter of the maximum.
- a cable adjuster moving means 201 for adjustment is provided.
- the cable adjuster moving means 201 includes a screw receiving wall 147 formed at the end of the adjuster receiving recess 149 of the cam member 140, a screw insertion hole 148 formed through the screw receiving wall 147, and a slide of the cable adjuster 150.
- Screw hole 156 formed in the end face in the direction (the other end face of the adjuster body 151 in the sliding direction), and the tip end side of the screw shaft portion is passed through the screw insertion hole 148 in a state where the head is received by the screw receiving wall 147.
- the adjustment screw 160 is screwed into the screw hole 156 of the cable adjuster 150. By rotating the adjustment screw 160, the cable adjuster 150 can be displaced to an arbitrary position in the sliding direction via the adjustment screw 160. It can be done.
- the outer surface 157 of the adjuster main body 151 of the cable adjuster 150 can ensure a large sliding range of the cable adjuster 150 so that it does not interfere with the outer peripheral wall 121 of the casing member 120 as much as possible when the cable adjuster 150 slides. It is formed with a circular arc surface. Further, an insertion hole 155 for inserting the jig pin 301 (see FIG. 16) into the cable adjuster 150 is formed in the plate thickness direction at a position near the outer surface 157 opposite to the guide rail 152 of the adjuster main body 151. ing.
- a service window 170 with an open / close lid is provided on the outer peripheral wall 121 of the casing member 120 so that the adjusting screw 160 can be rotated by a driver from the outside in an assembled state.
- the cover 130 is screwed to the casing member 120 so as to cover the opening surface of the casing member 120 after the cam member 140 and the ring portion 111 of the lever member 110 are accommodated in the casing member 120.
- the process of assembling the seat belt device 10 of the embodiment to the reclining seat 15 will be described.
- the sensor housing 32 of the acceleration sensor 30 needs to be in an appropriate posture when assembled.
- the attitude of the sensor housing 32 is adjusted by the cable advance / retreat mechanism 100 and the cable 13a, before the seat belt device 10 is assembled, the lengths of the cable advance / retreat mechanism 100 and the cable 13a are set to It is necessary to adjust to a state corresponding to the initial position (standard position).
- the temporary fixing pins 300 are passed through positioning holes 115, 145, and 125 formed in the lever member 110, the cam member 140, and the casing member 120, respectively. By doing so, the lever member 110, the cam member 140, and the casing member 120 can be temporarily fixed by the temporary fixing pin 300 so as not to move relative to each other.
- the cable advance / retreat mechanism 100 is attached to the reclining seat 15 or a jig corresponding thereto, the adjustment screw 160 of the cable adjuster moving means 201 is adjusted, and the position of the cable adjuster 150 is adjusted. To do.
- the cable 13a is pulled out from the terminal portion of the outer tube 13b by moving the end block 13c of the cable 13a via the cable adjuster 150.
- the length (progress) can be adjusted.
- the sensor housing 32 of the acceleration sensor 30 is adjusted to an appropriate direction by adjusting the pull-out length of the cable 13a appropriately.
- the temporary fixing pin 300 is inserted into the positioning holes 115, 145, and 125 of the lever member 110, the cam member 140, and the casing member 120, and the lever member 110, the cam member 140, The casing member 120 is temporarily fixed.
- the jig pin 301 is inserted into the insertion hole 155 of the cable adjuster 150, and the cable adjuster 150 is slid by applying a constant load in the arrow direction Z, thereby eliminating the slack of the cable 13a.
- the load pushing the jig pin 301 is monitored by the load cell.
- the adjustment screw 160 is tightened in that state.
- the head of the adjustment screw 160 is in close contact with the receiving surface of the screw receiving wall 147 of the cam member 140.
- the cable adjuster 150 is pulled, and the force pushing the jig pin 301 decreases.
- the tightening of the adjustment screw 160 is stopped. This completes the length adjustment of the cable 13a.
- FIGS. 13 to 15 are views showing the state of the seat belt retractor and the cable advance / retreat mechanism for each tilt angle of the seat back.
- FIG. 13 shows a state when the seat back is tilted back to a standard position of 15 °
- FIG. 14 shows a state when the seat back is tilted 95 °
- FIG. 15 shows a state when the seat back is tilted 75 °.
- This cable advance / retreat mechanism 100 can advance / retreat the cable 13a by a length corresponding to the tilt angle of the seat back 16 when the seat back 16 tilts. For example, when the seat back 16 tilts in the arrow Y1 direction from the reference posture shown in FIG. 13 to the position shown in FIG. 14, the one end 143a of the cam portion 143 of the cam member 140 hits the stopper projection 116 of the lever member 110. Although the cam member 140 cannot move, the casing member 120 rotates together with the seat back 16, so that the outer tube 13 b of the cable 13 a moves together with the casing member 120.
- the cable 13a since the end of the cable 13a is drawn out from the outer tube 13b, the cable 13a has a drawing operation in the direction of the arrow N1 (corresponding to a winding operation for the cable winding groove 144 of the cam portion 143). Is given to the attitude control mechanism 70.
- the casing member 120 rotates in the reverse direction (arrow Y2 direction), so that the outer tube 13b is connected to the cable 13a. Since the cable 13a is returned to the terminal side, the cable 13a pulled by the torsion spring 75 of the attitude control mechanism 70 returns into the outer tube 13b, and the cable 13a is pushed out in the direction of the arrow N2 (the cable of the cam portion 143). For the winding groove 144, corresponding to a pulling operation) is given, and this is transmitted to the attitude control mechanism 70.
- the operation of the present embodiment will be described.
- the cable 13a advances and retreats by a length corresponding to the reclining angle
- the pulley 73 of the attitude control mechanism 70 rotates according to the advance and retreat of the cable 13a.
- the adjustment gear 74 rotates in the opposite direction by the same angle as the pulley 73, and the rotation is transmitted to the sensor housing 32 by the pin 74c and the slit 32h.
- the sensor housing 32 is rotated in the opposite direction by the same angle as the tilt angle of the seat back 16, and the inertia body support surface 33 of the sensor housing 32 is held substantially horizontally.
- the rotation angle deviation occurs depending on the rotation angle position of the adjustment gear 74 and the sensor housing 32.
- the rotation angle deviation is caused by the change in the radius of the cable winding groove 73b. Therefore, the inclination angle of the seat back 16 and the rotation angle of the sensor housing 32 are synchronized with each other with high accuracy. As a result, the inertial support surface 33 of the sensor housing 32 is always held horizontally with high accuracy regardless of the reclining angle of the seat back 16.
- the sensor housing 32 always maintains the inclination in the vehicle front-rear direction in a substantially horizontal state. Therefore, the acceleration sensor 30 is used when a slow deceleration acts on the vehicle traveling direction or when the vehicle gradually moves from slow deceleration. In any case, such as when shifting to deceleration, the acceleration is properly detected, and the seat belt 19 is pulled out without causing a lock delay of the seat belt 19.
- the cable length adjusting mechanism 200 in the cable advance / retreat mechanism 100 is provided on the cam member 140 that actually detects the tilt angle of the seat back 16, and the end of the cable 13a is connected to the cable adjuster.
- the length of the cable 13a drawn from the end portion of the outer tube 13b protrusion allowance
- the advance / retreat accuracy of the cable 13a according to the reclining angle of the seat back 16 is increased, and the performance of the acceleration sensor 30 can be improved.
- the cable adjuster 150 is disposed on the outer peripheral portion of the cam member 140, the outer shape of the cable advance / retreat mechanism 100 can be made compact.
- the position of the cable adjuster 150 can be moved only by performing a simple operation of turning the adjustment screw 160, and the length of the cable 13a is adjusted so that no slack occurs. Can do.
- the rotational angle deviation generated between the adjustment gear 74 and the sensor housing 32 is provided between the cable advance / retreat mechanism 100 and the attitude control mechanism 70. Therefore, the inclination angle of the seat back 16 and the rotation angle of the sensor housing 32 can be accurately synchronized. Therefore, the inertial body support surface 33 that is the sensor reference surface can be kept horizontal with high accuracy even at an arbitrary seat back tilt angle, and the accuracy of the acceleration sensor 30 can be improved.
- the pulley 73 absorbs the rotational change of the pulley 73 due to the profile of the cable winding groove 73b (compensation means) of the pulley 73 in the attitude control mechanism 70. This can be realized simply by preparing 73.
- the rotation shaft L2 of the adjustment gear 74 and the swing shaft L1 of the sensor housing 32 are not on the same straight line, and there is a rotational angle deviation between the adjustment gear 74 and the sensor housing 32.
- the compensation means profile of the cable winding groove 73b of the pulley 73
- the retractor frame 21 to be attached in common can be used as a common part. Therefore, the retractor frame 21 that is troublesome to process can be made into one common component, which can contribute to cost reduction.
- the attitude control mechanism 70 synchronizes with the rotation of the pulley 73 and adjusts the rotation of the adjustment gear 74 by rotating the angle according to the forward or reverse distance of the cable 13a by the cable advance / retreat mechanism 100 and the sensor housing.
- a rotation transmission mechanism 76 that transmits the sensor housing 32 in the vehicle longitudinal direction.
- the sensor cover 31 is provided separately from the attitude control mechanism 70, and the rotation shaft of the adjustment gear 74 is arranged so that the swing shaft L1 of the sensor housing 32 is installed in the horizontal direction with respect to the vehicle left-right direction.
- the sensor cover 31 is formed so that L2 and the swing axis L1 of the sensor housing 32 intersect with a predetermined angle with respect to the vehicle left-right direction.
- the sensor housing 32, the sensor cover 31, the pulley 73, etc. can be made separate parts for the right seat and the left seat, and the remaining parts can be shared, so that the mounting posture is set for the right seat and the left seat. Even in different seat belt retractors, the components can be shared.
- the compensating means is configured by making the profile of the cable winding groove 73b of the pulley 73 of the attitude control mechanism 70 into a spline curve, but the cable of the cam member 140 of the cable advance / retreat mechanism 100
- the compensating means may be configured by making the profile of the winding groove 144 into a spline curve.
- the winding radius of the cable 13 a is set to change according to the rotation angle of the cam member 140. By doing so, it is possible to compensate for the rotational angle deviation between the adjustment gear 74 and the sensor housing 32.
- the profile of the cable winding groove 73b of the pulley 73 of the attitude control mechanism 70 is not a spline curve but a perfect circle.
- the adjustment gear 74 is engaged with the gear 73a of the pulley 73 of the attitude control mechanism 70, whereby the adjustment gear 74 is used as a rotating member, and the rotation of the adjustment gear 74 is transmitted to the sensor housing 32 with the pin 74c and the slit.
- the rotating member may be configured by the pulley 73 itself.
- the pulley 73 of the attitude control mechanism 70 can be rotated in the direction opposite to the rotation direction of the seat back 16, so By providing a pin and engaging with the slit 32 h of the sensor housing 32, the sensor housing 32 can be rotated in the direction opposite to the seat back 16.
- the rotation track surface of the pulley 73 and the rotation track surface of the sensor housing 32 are non-parallel, and when the rotation is transmitted from the pulley 73 to the sensor housing 32, both rotation track surfaces are non-parallel.
- Compensation means for compensating for the rotational angle deviation caused by this is provided between the cable advance / retreat mechanism 100 and the attitude control mechanism 70.
- the cable advancing / retreating mechanism 100 for example, a system combining a pinion and a rack can be employed.
- the cable adjuster 150 is cabled from the terminal part of the exterior tube 13b. It can also be configured by a spring biased in the direction of pulling out 13a. For example, when a compression coil spring is used, a compression coil spring is inserted between the cable adjuster 150 and the other end 143b of the cam portion 143, and the cable adjuster 150 is urged away from the other end 143b of the cam portion 143. Good.
- the cable adjuster 150 can be moved by the biasing force of the spring, and the length of the cable 13a can be adjusted so that no slack occurs.
- the present invention relates to a Japanese patent application filed on November 14, 2011 (Japanese Patent Application No. 2011-248981), a Japanese patent application filed on November 14, 2011 (Japanese Patent Application No. 2011-248982), and a December 14, 2011 application. This is based on a Japanese patent application (Japanese Patent Application No. 2011-273694) filed in Japan, the contents of which are incorporated herein by reference.
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Abstract
Description
(1) リクライニング式シートのシートバックに取り付けられ、必要時にシートベルトを巻き取るシートベルトリトラクタと、
前記リクライニング式シートのシートバックとシートクッションの連結部に配置され、前記シートバックが車両前後方向に傾動する時の傾き角度を検出し、当該傾き角度を前記シートベルトリトラクタに伝えるためのケーブルを有し、前記ケーブルが、前記シートバックの前記傾き角度に対応する距離を、前記ケーブルの長さ方向に前進または後進するケーブル進退機構と、
を備えるシートベルト装置であって、
前記シートベルトリトラクタが、
前記シートバックの左右方向の中心を上下方向に延びる直線に対して車両の左右方向に傾斜して前記シートバックに固定されるリトラクタフレームと、
前記リトラクタフレームにより支持され、前記シートベルトを巻き取るためのスピンドルと、
前記リトラクタフレームに取り付けられ、車両前後方向における加速度を検出する加速度センサと、
該加速度センサによって検出される車両前後方向の加速度に応じて、シートベルトの引き出し動作をロックするロック機構と、
前記加速度センサのセンサ基準面を水平に保つ姿勢制御機構と、
を有し、
前記加速度センサは、
前記リトラクタフレームに固定されたセンサカバーと、
車両前後方向に所定値以上の加速度が作用したとき車両の前後方向へ移動する慣性体と、
車両左右方向に沿った揺動軸を有し、前記センサカバーに保持され、前記慣性体が載置される慣性体支持面を有するセンサハウジングと、
前記慣性体が車両前後方向へ移動することに連動して前記ロック機構をロック側へ作動させる作動部材と、
を有し、
前記姿勢制御機構は、
前記ケーブル進退機構による前記ケーブルの前進または後進の距離に応じた角度を回動する回転部材と、
前記回転部材の回転を前記センサハウジングに伝達して、前記センサハウジングを車両前後方向に揺動させる回転伝達機構と、
を備え、
前記センサハウジングの揺動軸が、車両左右方向に対して水平方向に設置されるように、前記回転部材の回動軸と前記センサハウジングの揺動軸とが車両左右方向に対して所定角度を持って交差し、
前記シートバックが車両前後方向に傾動しても、前記センサハウジングの車両前後方向の揺動により、前記センサハウジングの前記慣性体支持面が水平な状態に保持されており、
前記回転部材の回転軌道面と前記センサハウジングの回転軌道面とが非平行であり、
前記回転伝達機構によって前記回転部材から前記センサハウジングに回転を伝える際に、前記両回転軌道面が非平行であることに起因して発生する回転角度ズレを補償する補償手段が、前記ケーブル進退機構から前記姿勢制御機構までの間に設けられていることを特徴とするシートベルト装置。
(2) 前記姿勢制御機構には、前記ケーブルの進退の動きを回転運動に変換し、前記回転部材に回転を伝えるプーリが設けられており、前記プーリのケーブル巻き付け部がスプライン曲線状に形成されることで、ケーブルの巻き付け半径が前記プーリの回転角度に応じて変化するように設定され、
前記補償手段は、前記スプライン曲線状に形成された前記プーリのケーブル巻き付け部によって構成されることを特徴とする(1)に記載のシートベルト装置。
(3) 前記ケーブル進退機構には、回転に応じてケーブルを巻き付けたり引き出したりしてケーブルをシートバックの前記傾き角度に応じた距離を進退させるカム部材が設けられており、該カム部材のケーブル巻き付け部がスプライン曲線状に形成されることで、ケーブルの巻き付け半径が前記カム部材の回転角度に応じて変化するように設定され、
前記補償手段は、前記スプライン曲線状に形成された前記カム部材のケーブル巻き付け部によって構成されることを特徴とする(1)に記載のシートベルト装置。
(4) 前記回転伝達機構は、前記回転部材と前記センサハウジングにそれぞれ設けられ、前記揺動軸および回動軸から半径方向に離れた位置に配されて互いに係合するピンとスリットとを有することを特徴とする(1)~(3)のいずれか1項に記載のシートベルト装置。
(5) リクライニング式シートのシートバックに取り付けられ、必要時にシートベルトを巻き取るシートベルトリトラクタと、
前記リクライニング式シートのシートバックとシートクッションの連結部に配置され、前記シートバックが車両前後方向に傾動する時の傾き角度を検出し、当該傾き角度を前記シートベルトリトラクタに伝えるためのケーブルを有し、該ケーブルが、前記シートバックの前記傾き角度に対応する距離を、前記ケーブルの長さ方向に前進または後進するケーブル進退機構と、
を備えるシートベルト装置であって、
前記シートベルトリトラクタが、
前記シートバックの左右方向の中心を上下方向に延びる直線に対して車両の左右方向に傾斜して前記シートバックに固定されるリトラクタフレームと、
前記リトラクタフレームにより支持され、前記シートベルトを巻き取るためのスピンドルと、
前記リトラクタフレームに取り付けられ、車両前後方向における加速度を検出する加速度センサと、
該加速度センサによって検出される車両前後方向の加速度に応じて、シートベルトの引き出し動作をロックするロック機構と、
前記加速度センサのセンサ基準面を水平に保つ姿勢制御機構と、
を有し、
前記加速度センサは、
前記リトラクタフレームに固定されたセンサカバーと、
車両前後方向に所定値以上の加速度が作用したとき車両の前後方向へ移動する慣性体と、
車両左右方向に沿った揺動軸を有し、前記センサカバーに保持され、前記慣性体が載置される慣性体支持面を有するセンサハウジングと、
前記慣性体が車両前後方向へ移動することに連動して前記ロック機構をロック側へ作動させる作動部材と、
を有し、
前記姿勢制御機構は、前記ケーブル進退機構のケーブルの進退の動きを回転運動に変換するプーリを備え、該プーリの回転軌道面と前記センサハウジングの回転軌道面とが非平行であり、
前記プーリから前記センサハウジングに回転を伝える際に、前記両回転軌道面が非平行であることに起因して発生する回転角度ズレを補償する補償手段が、前記ケーブル進退機構から前記姿勢制御機構までの間に設けられていることを特徴とするシートベルト装置。
(6) 前記プーリのケーブル巻き付け部がスプライン曲線状に形成されることで、ケーブルの巻き付け半径が前記プーリの回転角度に応じて変化するように設定され、
前記補償手段は、前記スプライン曲線状に形成された前記プーリのケーブル巻き付け部によって構成されることを特徴とする(5)に記載のシートベルト装置。
(7) 前記ケーブル進退機構には、回転に応じてケーブルを巻き付けたり引き出したりしてケーブルをシートバックの前記傾き角度に応じた距離を進退させるカム部材が設けられており、該カム部材のケーブル巻き付け部がスプライン曲線状に形成されることで、ケーブルの巻き付け半径が前記カム部材の回転角度に応じて変化するように設定され、
前記補償手段は、前記スプライン曲線状に形成された前記カム部材のケーブル巻き付け部によって構成されることを特徴とする(5)に記載のシートベルト装置。
(8) 前記姿勢制御機構は、
前記プーリの回転と同期し、前記ケーブル進退機構による前記ケーブルの前進または後進の距離に応じた角度を回動する回転部材と、
前記回転部材の回転を前記センサハウジングに伝達して、前記センサハウジングを車両前後方向に揺動させる回転伝達機構と、
をさらに備え、
前記センサカバーは、前記姿勢制御機構と別体に設けられ、
前記センサハウジングの揺動軸が、車両左右方向に対して水平方向に設置されるように、前記回転部材の回動軸と前記センサハウジングの揺動軸とが車両左右方向に対して所定角度を持って交差するように前記センサカバーが形成されていることを特徴とする(5)~(7)のいずれかに記載のシートベルト装置。
(9) 前記回転伝達機構は、前記回転部材と前記センサハウジングにそれぞれ設けられ、前記揺動軸および回動軸から半径方向に離れた位置に配されて互いに係合するピンとスリットとを有することを特徴とする(8)に記載のシートベルト装置。
(10) 前記ケーブル進退機構が、
前記シートクッションに固定されるレバー部材と、
前記シートバックの回動中心と同軸に、前記レバー部材に対して回動自在に配置され、前記シートバックに固定されてシートバックの傾動に伴って回動するケーシング部材と、
前記シートバックの回動中心と同軸に、前記レバー部材及び前記ケーシング部材に対して回動自在に設けられ、前記シートバックの傾動角度が所定範囲にある間は、前記シートバックの傾動に伴って前記ケーシング部材が回動するときに、前記レバー部材によって移動を阻止されるカム部材と、
を有しており、
前記ケーシング部材には、前記ケーブルをスライド自在に保持する外装チューブの端末部を固定するための外装チューブ端末固定部が設けられ、
前記カム部材には、該カム部材の外周面に沿って形成されて前記外装チューブの端末部から引き出されたケーブルを巻き付けるケーブル巻き付け溝が設けられ、
該ケーブル巻き付け溝に巻き付けられた状態の前記ケーブルの端末部を固定するケーブル端末固定部を備え、前記カム部材の外周部で直線的にスライド自在に装着されたケーブルアジャスタと、該ケーブルアジャスタをスライドさせることで前記外装チューブの端末部からのケーブルの引き出し長さを調節するケーブルアジャスタ移動手段と、を有するケーブル長さ調整機構が、前記カム部材に設けられていることを特徴とする(5)~(7)のいずれかに記載のシートベルト装置。
(11) 前記ケーブルアジャスタ移動手段が、
前記カム部材に形成されたネジ受壁と、
該ネジ受壁に貫通形成されたネジ挿通孔と、
前記ケーブルアジャスタのスライド方向の端面に形成されたネジ孔と、
前記ネジ受壁に頭部を受け止められた状態でネジ軸部の先端側が前記ネジ挿通孔に通されて前記ケーブルアジャスタのネジ孔にねじ込まれた調節ネジと、
を含んでおり、
前記調節ネジの回転操作により前記ケーブルアジャスタを該調整ネジを介して変位させることを特徴とする(10)に記載のシートベルト装置。
(12) 前記ケーブルアジャスタ移動手段が、
前記ケーブルアジャスタを、前記外装チューブの端末部から前記ケーブルを引き出す方向に付勢するバネを含むことを特徴とする(10)に記載のシートベルト装置。
(13) 前記レバー部材と前記ケーシング部材と前記カム部材とに、位置合わせしたときに当該3つの部材を貫通する位置決め孔がそれぞれ設けられていることを特徴とする(10)~(12)のいずれかに記載のシートベルト装置。
(14) 前記ケーブルアジャスタは、前記カム部材の外周部に前記シートバックの回動中心を中心とする円の接線方向にスライド自在に装着されたことを特徴とする(10)~(13)のいずれかに記載のシートベルト装置。
また、「水平」または「水平方向」とは、水平(水平方向)を含み、当該水平から少し変化しても、製造上で発生する誤差や、製品を設計する場合に本発明の効果を生じることができる範囲を含む。
ケーブル進退機構100は、図11及び図12に示すように、レバー部材110と、ケーシング部材120と、ケーシング部材120の開口面を塞ぐカバー130と、ケーシング部材120の内部に回動可能に収容されるカム部材140と、ケーブルアジャスタ150及びケーブルアジャスタ移動手段201よりなるケーブル長さ調整機構200と、を有している。
リクライニング式シート15にシートベルト装置10を組み付ける際の前提として、加速度センサ30のセンサハウジング32は、組み付けられたときに適正な姿勢となっている必要がある。ここで、センサハウジング32の姿勢は、ケーブル進退機構100及びケーブル13aによって調整されるので、シートベルト装置10の組み付けを行う前に、ケーブル進退機構100及びケーブル13aの長さを、シートバック16の初期位置(標準位置)に対応した状態に調整しておく必要がある。
図13~図15は、シートバックの傾動角度ごとのシートベルトリトラクタとケーブル進退機構の状態を示す図である。図13はシートバックが後ろ倒し15°の標準姿勢のときの状態、図14は後ろ倒し95°のときの状態、図15は前倒し75°のときの状態を示している。
シートバック16のリクライニング角度が調節されると、そのリクライニング角度に応じた長さだけケーブル13aが進退し、ケーブル13aの進退に応じて姿勢制御機構70のプーリ73が回転する。プーリ73がシートバック16の傾動方向と同方向に回転すると、アジャストギヤ74がプーリ73と同じ角度だけ逆方向に回動し、その回動がピン74cとスリット32hによってセンサハウジング32に伝えられ、センサハウジング32がシートバック16の傾動角度と同角度だけ反対方向に回動して、センサハウジング32の慣性体支持面33が略水平に保持される。
例えば、上記実施形態のシートベルト装置では、姿勢制御機構70のプーリ73のケーブル巻き付け溝73bのプロフィールをスプライン曲線状とすることで補償手段を構成したが、ケーブル進退機構100のカム部材140のケーブル巻き付け溝144のプロフィールをスプライン曲線状とすることで、補償手段を構成してもよい。
また、アジャストギヤ74とセンサハウジング32の回転角度ズレを補償する補償手段としては、姿勢制御機構70のプーリ73の支持軸、すなわち、本実施形態では、プーリ73を支持する第1プーリケース71の支持軸71c、のプロフィールをスプライン曲線状としても、同様の効果を奏することができる。
また、上記実施形態では、姿勢制御機構70のプーリ73のギヤ73aにアジャストギヤ74を噛み合わせることで、アジャストギヤ74を回転部材とし、そのアジャストギヤ74の回転をセンサハウジング32にピン74cとスリット32hの組み合わせで伝達させるようにした場合を説明したが、回転部材をプーリ73自体によって構成することも可能である。
なお、本発明は、2011年11月14日出願の日本特許出願(特願2011-248981)、2011年11月14日出願の日本特許出願(特願2011-248982)、及び2011年12月14日出願の日本特許出願(特願2011-273694)に基づくものであり、その内容はここに参照として取り込まれる。
11 シートベルトリトラクタ
13a ケーブル
13b 外装チューブ
13c エンドブロック(ケーブルの端末部)
15 リクライニング式シート
16 シートバック
17 シートクッション
18 シートバックとシートクッションの連結部
19 シートベルト
21 リトラクタフレーム
22 スピンドル
24 ロック機構
30 加速度センサ
31 センサカバー
32 センサハウジング
32h スリット(回転伝達機構)
33 慣性体支持面(センサ基準面)
35 ボール(慣性体)
36 第1センサレバー(作動部材)
37 第2センサレバー(作動部材)
70 姿勢制御機構
73 プーリ
73b ケーブル巻き付け溝(ケーブル巻き付け部、補償手段)
74 アジャストギヤ(回転部材)
74c ピン
76 回転伝達機構
100 ケーブル進退機構
110 レバー部材
115 位置決め孔
120 ケーシング部材
125 位置決め孔
128 外装チューブ端末固定部
140 カム部材
144 ケーブル巻き付け溝(ケーブル巻き付け部、補償手段)
145 位置決め孔
147 ネジ受壁
148 ネジ挿通孔
149 アジャスタ収容凹部
150 ケーブルアジャスタ
154 ケーブル端末固定部
156 ネジ孔
160 調整ネジ
S1 センサ基準線
L1 揺動軸
L2 回動軸
Claims (14)
- リクライニング式シートのシートバックに取り付けられ、必要時にシートベルトを巻き取るシートベルトリトラクタと、
前記リクライニング式シートのシートバックとシートクッションの連結部に配置され、前記シートバックが車両前後方向に傾動する時の傾き角度を検出し、当該傾き角度を前記シートベルトリトラクタに伝えるためのケーブルを有し、前記ケーブルが、前記シートバックの前記傾き角度に対応する距離を、前記ケーブルの長さ方向に前進または後進するケーブル進退機構と、
を備えるシートベルト装置であって、
前記シートベルトリトラクタが、
前記シートバックの左右方向の中心を上下方向に延びる直線に対して車両の左右方向に傾斜して前記シートバックに固定されるリトラクタフレームと、
前記リトラクタフレームにより支持され、前記シートベルトを巻き取るためのスピンドルと、
前記リトラクタフレームに取り付けられ、車両前後方向における加速度を検出する加速度センサと、
該加速度センサによって検出される車両前後方向の加速度に応じて、シートベルトの引き出し動作をロックするロック機構と、
前記加速度センサのセンサ基準面を水平に保つ姿勢制御機構と、
を有し、
前記加速度センサは、
前記リトラクタフレームに固定されたセンサカバーと、
車両前後方向に所定値以上の加速度が作用したとき車両の前後方向へ移動する慣性体と、
車両左右方向に沿った揺動軸を有し、前記センサカバーに保持され、前記慣性体が載置される慣性体支持面を有するセンサハウジングと、
前記慣性体が車両前後方向へ移動することに連動して前記ロック機構をロック側へ作動させる作動部材と、
を有し、
前記姿勢制御機構は、
前記ケーブル進退機構による前記ケーブルの前進または後進の距離に応じた角度を回動する回転部材と、
前記回転部材の回転を前記センサハウジングに伝達して、前記センサハウジングを車両前後方向に揺動させる回転伝達機構と、
を備え、
前記センサハウジングの揺動軸が、車両左右方向に対して水平方向に設置されるように、前記回転部材の回動軸と前記センサハウジングの揺動軸とが車両左右方向に対して所定角度を持って交差し、
前記シートバックが車両前後方向に傾動しても、前記センサハウジングの車両前後方向の揺動により、前記センサハウジングの前記慣性体支持面が水平な状態に保持されており、
前記回転部材の回転軌道面と前記センサハウジングの回転軌道面とが非平行であり、
前記回転伝達機構によって前記回転部材から前記センサハウジングに回転を伝える際に、前記両回転軌道面が非平行であることに起因して発生する回転角度ズレを補償する補償手段が、前記ケーブル進退機構から前記姿勢制御機構までの間に設けられていることを特徴とするシートベルト装置。 - 前記姿勢制御機構には、前記ケーブルの進退の動きを回転運動に変換し、前記回転部材に回転を伝えるプーリが設けられており、前記プーリのケーブル巻き付け部がスプライン曲線状に形成されることで、ケーブルの巻き付け半径が前記プーリの回転角度に応じて変化するように設定され、
前記補償手段は、前記スプライン曲線状に形成された前記プーリのケーブル巻き付け部によって構成されることを特徴とする請求項1に記載のシートベルト装置。 - 前記ケーブル進退機構には、回転に応じてケーブルを巻き付けたり引き出したりしてケーブルをシートバックの前記傾き角度に応じた距離を進退させるカム部材が設けられており、該カム部材のケーブル巻き付け部がスプライン曲線状に形成されることで、ケーブルの巻き付け半径が前記カム部材の回転角度に応じて変化するように設定され、
前記補償手段は、前記スプライン曲線状に形成された前記カム部材のケーブル巻き付け部によって構成されることを特徴とする請求項1に記載のシートベルト装置。 - 前記回転伝達機構は、前記回転部材と前記センサハウジングにそれぞれ設けられ、前記揺動軸および回動軸から半径方向に離れた位置に配されて互いに係合するピンとスリットとを有することを特徴とする請求項1~3のいずれか1項に記載のシートベルト装置。
- リクライニング式シートのシートバックに取り付けられ、必要時にシートベルトを巻き取るシートベルトリトラクタと、
前記リクライニング式シートのシートバックとシートクッションの連結部に配置され、前記シートバックが車両前後方向に傾動する時の傾き角度を検出し、当該傾き角度を前記シートベルトリトラクタに伝えるためのケーブルを有し、該ケーブルが、前記シートバックの前記傾き角度に対応する距離を、前記ケーブルの長さ方向に前進または後進するケーブル進退機構と、
を備えるシートベルト装置であって、
前記シートベルトリトラクタが、
前記シートバックの左右方向の中心を上下方向に延びる直線に対して車両の左右方向に傾斜して前記シートバックに固定されるリトラクタフレームと、
前記リトラクタフレームにより支持され、前記シートベルトを巻き取るためのスピンドルと、
前記リトラクタフレームに取り付けられ、車両前後方向における加速度を検出する加速度センサと、
該加速度センサによって検出される車両前後方向の加速度に応じて、シートベルトの引き出し動作をロックするロック機構と、
前記加速度センサのセンサ基準面を水平に保つ姿勢制御機構と、
を有し、
前記加速度センサは、
前記リトラクタフレームに固定されたセンサカバーと、
車両前後方向に所定値以上の加速度が作用したとき車両の前後方向へ移動する慣性体と、
車両左右方向に沿った揺動軸を有し、前記センサカバーに保持され、前記慣性体が載置される慣性体支持面を有するセンサハウジングと、
前記慣性体が車両前後方向へ移動することに連動して前記ロック機構をロック側へ作動させる作動部材と、
を有し、
前記姿勢制御機構は、前記ケーブル進退機構のケーブルの進退の動きを回転運動に変換するプーリを備え、該プーリの回転軌道面と前記センサハウジングの回転軌道面とが非平行であり、
前記プーリから前記センサハウジングに回転を伝える際に、前記両回転軌道面が非平行であることに起因して発生する回転角度ズレを補償する補償手段が、前記ケーブル進退機構から前記姿勢制御機構までの間に設けられていることを特徴とするシートベルト装置。 - 前記プーリのケーブル巻き付け部がスプライン曲線状に形成されることで、ケーブルの巻き付け半径が前記プーリの回転角度に応じて変化するように設定され、
前記補償手段は、前記スプライン曲線状に形成された前記プーリのケーブル巻き付け部によって構成されることを特徴とする請求項5に記載のシートベルト装置。 - 前記ケーブル進退機構には、回転に応じてケーブルを巻き付けたり引き出したりしてケーブルをシートバックの前記傾き角度に応じた距離を進退させるカム部材が設けられており、該カム部材のケーブル巻き付け部がスプライン曲線状に形成されることで、ケーブルの巻き付け半径が前記カム部材の回転角度に応じて変化するように設定され、
前記補償手段は、前記スプライン曲線状に形成された前記カム部材のケーブル巻き付け部によって構成されることを特徴とする請求項5に記載のシートベルト装置。 - 前記姿勢制御機構は、
前記プーリの回転と同期し、前記ケーブル進退機構による前記ケーブルの前進または後進の距離に応じた角度を回動する回転部材と、
前記回転部材の回転を前記センサハウジングに伝達して、前記センサハウジングを車両前後方向に揺動させる回転伝達機構と、
をさらに備え、
前記センサカバーは、前記姿勢制御機構と別体に設けられ、
前記センサハウジングの揺動軸が、車両左右方向に対して水平方向に設置されるように、前記回転部材の回動軸と前記センサハウジングの揺動軸とが車両左右方向に対して所定角度を持って交差するように前記センサカバーが形成されていることを特徴とする請求項5~7のいずれか1項に記載のシートベルト装置。 - 前記回転伝達機構は、前記回転部材と前記センサハウジングにそれぞれ設けられ、前記揺動軸および回動軸から半径方向に離れた位置に配されて互いに係合するピンとスリットとを有することを特徴とする請求項8に記載のシートベルト装置。
- 前記ケーブル進退機構が、
前記シートクッションに固定されるレバー部材と、
前記シートバックの回動中心と同軸に、前記レバー部材に対して回動自在に配置され、前記シートバックに固定されてシートバックの傾動に伴って回動するケーシング部材と、
前記シートバックの回動中心と同軸に、前記レバー部材及び前記ケーシング部材に対して回動自在に設けられ、前記シートバックの傾動角度が所定範囲にある間は、前記シートバックの傾動に伴って前記ケーシング部材が回動するときに、前記レバー部材によって移動を阻止されるカム部材と、
を有しており、
前記ケーシング部材には、前記ケーブルをスライド自在に保持する外装チューブの端末部を固定するための外装チューブ端末固定部が設けられ、
前記カム部材には、該カム部材の外周面に沿って形成されて前記外装チューブの端末部から引き出されたケーブルを巻き付けるケーブル巻き付け溝が設けられ、
該ケーブル巻き付け溝に巻き付けられた状態の前記ケーブルの端末部を固定するケーブル端末固定部を備え、前記カム部材の外周部で直線的にスライド自在に装着されたケーブルアジャスタと、該ケーブルアジャスタをスライドさせることで前記外装チューブの端末部からのケーブルの引き出し長さを調節するケーブルアジャスタ移動手段と、を有するケーブル長さ調整機構が、前記カム部材に設けられていることを特徴とする請求項5~7のいずれか1項に記載のシートベルト装置。 - 前記ケーブルアジャスタ移動手段が、
前記カム部材に形成されたネジ受壁と、
該ネジ受壁に貫通形成されたネジ挿通孔と、
前記ケーブルアジャスタのスライド方向の端面に形成されたネジ孔と、
前記ネジ受壁に頭部を受け止められた状態でネジ軸部の先端側が前記ネジ挿通孔に通されて前記ケーブルアジャスタのネジ孔にねじ込まれた調節ネジと、
を含んでおり、
前記調節ネジの回転操作により前記ケーブルアジャスタを該調整ネジを介して変位させることを特徴とする請求項10に記載のシートベルト装置。 - 前記ケーブルアジャスタ移動手段が、
前記ケーブルアジャスタを、前記外装チューブの端末部から前記ケーブルを引き出す方向に付勢するバネを含むことを特徴とする請求項10に記載のシートベルト装置。 - 前記レバー部材と前記ケーシング部材と前記カム部材とに、位置合わせしたときに当該3つの部材を貫通する位置決め孔がそれぞれ設けられていることを特徴とする請求項10~12のいずれか1項に記載のシートベルト装置。
- 前記ケーブルアジャスタは、前記カム部材の外周部に前記シートバックの回動中心を中心とする円の接線方向にスライド自在に装着されたことを特徴とする請求項10~13のいずれか1項に記載のシートベルト装置。
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US9132802B2 (en) | 2015-09-15 |
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US20140306508A1 (en) | 2014-10-16 |
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JP5950931B2 (ja) | 2016-07-13 |
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