KR101766844B1 - Safety belt retractor having vehicle sensor - Google Patents

Abstract

A safety belt retractor having a vehicle sensor comprises: a fixing frame connected to a vehicle body; a spool mounted on the fixing frame to be rotated, and having a seat belt wound on the outside thereof; a control disc rotated with the spool, and having an outer gear tooth part; and a vehicle sensor unit including an inertia body mounted in a housing fixed to one side of the fixing frame and flowing in a dangerous situation in which a deceleration which is higher than a normal deceleration of a vehicle is applied to the vehicle, and including a sensor lever interconnected by the inertia body and having a locking tip hung on the outer gear tooth part of the control disc. The sensor lever is formed in a structure in which a decrease in a suitable distance for allowing the outer gear tooth part of the control disc and the locking tip of the sensor lever to interact with each other is compensated as the control disc is moved in an inclined direction of the fixing frame when the fixing frame is coupled with the vehicle body while being inclined at a predetermined angle. According to the structure of the present invention, a mounting angle of a retractor can be increased.

Description

[0001] SAFETY BELT RETRACTOR HAVING VEHICLE SENSOR [0002]

The present invention relates to a seat belt retractor, and more particularly, to a seat belt retractor having a vehicle sensor.

A seatbelt device mounted on a vehicle is for restricting a passenger seated on a seat by a seatbelt drawn from a seatbelt retractor so as to protect an occupant in a vehicle collision or the like.

The seat belt retractor detects the acceleration with a vehicle sensor when an acceleration greater than a predetermined value is applied in a horizontal direction at the time of a vehicle collision, etc., and activates the lock device of the seat belt, thereby disabling the withdrawal of the seat belt. It is known to use a ball or a self-supporting inert body as an inertial body used in a vehicle sensor.

The vehicle sensor interacts with the external teeth of the control disk, which is moved by the inertia body and rotates together with the spool of the seat belt retractor, when the vehicle decelerates at a higher deceleration than the normal deceleration of the vehicle, And a sensor lever.

Such a seat belt retractor can be mounted on a vehicle body, such as a center pillar of a vehicle, a seat back, a rear pillar, or the like. Therefore, the mounting posture of the seat belt retractor can be variously changed depending on the structure of the center pillar, the seat back, and the rear pillar. That is, the seat belt retractor is not always mounted horizontally but can be mounted at a predetermined angle from the horizontal position to the left and right.

As described above, if the attitude of the seat belt retractor is changed over a certain range, the acceleration can not be properly detected.

For example, when the retractor having the vehicle sensor has an attitude inclined over a certain range from the horizontal state, the sensor lever of the control disc and the vehicle sensor become too close to each other, Can not be performed.

Further, when the retractor having the above-described vehicle sensor is mounted on, for example, a seat back and the seat back is inclined in all directions of the vehicle, the sensor lever of the vehicle sensor is caught by the external teeth of the control disc, Constrain rotation. As a result, when the occupant wishes to wear the seat belt, it is impossible to wear the seat belt as the rotation of the spool is restrained.

U.S. Patent Publication No. US2003234310 United States Patent Number: US4,979,695

An object of the present invention is to provide a seat belt retractor having a vehicle sensor that compensates for a distance between a sensor lever of a vehicle sensor and an external tooth portion of a control disk when the retractor is slantly mounted on the vehicle body.

Another object of the present invention is to provide an anti-locking device for preventing the sensor lever of the vehicle sensor from being caught by the external tooth portion of the control disk even when the retractor is tilted from the horizontal state at the time of pulling out the seat belt, There is provided a seat belt retractor having a vehicle sensor capable of smoothly performing an operation and capable of performing a smooth sensing function by eliminating interferences between a stopper of the locking preventing device and a sensor lever during a releasing operation of the locking preventing device .

According to an embodiment of the present invention, there is provided a vehicle comprising: a fixed frame connected to a vehicle body; A spool rotatably mounted on the stationary frame and externally threaded on the seat belt; A control disk rotating together with the spool and having an external tooth portion; An inertial body mounted in a housing fixed to one side of the fixed frame and oscillating when a deceleration higher than a normal deceleration of the vehicle is applied to the vehicle; And a sensor lever including a sensor lever having a locking tip that engages with an external tooth of the disk, wherein when the fixed frame is coupled to the vehicle body at a predetermined angular inclination, The seat belt retractor having a vehicle sensor configured to compensate for a decrease in the proper distance at which the locking tip of the sensor lever can interact with the external teeth of the control disc as the seat belt moves in the tilting direction of the seat belt / RTI >

The end of the locking tip of the sensor lever may be formed to have a sloped inclination in such a way that the distance from the external tooth is increased along the direction in which the control disk flows.

Wherein the angle of the inclined portion of the locking tip maintains the contact surface of the inertial body in the horizontal state when the retractor is installed to be inclined at a predetermined angle from the horizontal state, May be formed smaller than the maximum mounting angle of the vehicle sensor unit with respect to the reference position of the housing which permits proper interaction with the vehicle sensor unit.

The angle of the inclined portion of the locking tip may be between 10 degrees and 25 degrees.

The retractor further includes an anti-lock unit for restraining the sensor lever to prevent the sensor lever from being engaged with the external tooth portion of the control disk while the retractor is inclined while the seat belt is being pulled out , The locking preventing unit is rotatably supported at a locking position for restricting the sensor lever to the housing and an unlocking position for releasing restraint of the sensor lever, and the locking tip of the sensor lever in the locked state of the sensor lever A ring member having a stopper selectively in contact with the spool, a ring member having a contact pin for allowing rotation to the locking position and the unlocking position, a disc tooth portion eccentric to the center of the spool and meshing with an internal tooth portion in the housing, Having a driving projection for rotating the ring member in contact with the contact pin of the ring member Comprises a disc, and the sensor lever may be a case that the ring member is rotated to the unlocking position form the structure to avoid interfering with said stopper of said ring member.

The sensor lever may include an interference preventing groove formed by cutting a portion corresponding to the stopper of the ring member while the ring member is rotated to the lock releasing position.

According to an embodiment of the present invention, the end of the locking tip of the sensor lever is formed to have a sloped inclined portion in such a way that the distance from the external tooth is increased along the direction in which the control disk flows, Can be increased.

According to the embodiment of the present invention, it is possible to effectively prevent the sensor lever from being engaged with the external tooth portion of the control disk by restraining the sensor lever even when the retractor is tilted through the locking prevention unit, The interference preventing groove is formed in a part of the lever to prevent the stopper of the locking preventing unit from interfering with the sensor lever of the vehicle sensor when the locking preventing unit is in the released state.

1 is a view for explaining a mounting state of a seat belt retractor according to the present invention.
2 is a perspective view showing a configuration of a seat belt retractor according to the present invention.
3 is an exploded perspective view of the seat belt retractor of the present invention.
4 is a partial perspective view showing a state in which the vehicle sensor unit is mounted in the housing of the present invention.
5 is a longitudinal sectional view showing the configuration of the vehicle sensor unit of the present invention.
6 is an exploded perspective view showing the configuration of the vehicle sensor unit of the present invention.
7 is a view showing a vehicle sensor unit mounted in a state of being inclined at a predetermined angle from a reference position in the housing when the retractor of the present invention is mounted with a certain angle of inclination.
8 is a plan view showing a state in which the locking preventing unit of the vehicle sensor unit of the present invention is mounted on the housing in a locked state.
9 is an exploded perspective view showing a configuration of an anti-lock unit of the vehicle sensor unit of the present invention.
10 is an enlarged view of the X display portion of Fig.
11 is a plan view showing a state in which the locking preventing unit of the vehicle sensor unit of the present invention is mounted on the housing in the unlocked state.
12 is a perspective view showing the configuration of the sensor lever of the vehicle sensor unit of the present invention.
13 is a partial plan view showing the unlocked state of the locking preventing unit of the vehicle sensor unit of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know.

1 is a view for explaining a mounting state of a seat belt retractor according to the present invention.

Referring to Fig. 1, there is shown a retractor 3 in which a seat belt 1 restricting a passenger seated on a seat is retractably pulled.

The retractor 3 can make the horizontal posture H and the inclined postures L and R inclined to the left and right at a predetermined angle from the horizontal state according to the state of attachment of the vehicle body.

For example, when mounted on a center pillar of a vehicle inclined at a predetermined angle, the retractor 3 has a tilted posture corresponding to the angle of the center pillar, or easily pulls out the seat belt when mounted on the seat back It is possible to attain an inclined posture in the width direction of the vehicle.

FIG. 2 is a perspective view showing a structure of a seat belt retractor according to the present invention, and FIG. 3 is an exploded perspective view of a seat belt retractor according to the present invention.

2 and 3, the retractor 1 includes a fixed frame 10, a spool 30, a winding spring unit 40, a locking unit 50, a vehicle sensor unit 60, 70, and left and right housings 80, 90.

The stationary frame 10 is fixed to a portion to which the spool 30, the winding spring unit 50, the locking unit 50, the vehicle sensor unit 60, the locking prevention unit 70, the housings 80, to be. The stationary frame 10 includes a base wall 11 mounted on a vehicle body, such as a center pillar, a rear pillar, a seat back, etc., and side walls 13, 15 rotatably installed through the spool 30.

The spool 30 is a portion where the seat belt is wound. The spool 30 includes a cylindrical body 31 rotatably operated on the fixed frame 10 and spool shafts 33 and 35 protruding from the centers of both sides of the cylindrical body 31. The two spool shafts 33 and 35 are rotatably coupled directly or indirectly to the center of the housings 80 and 90 fixed to both side walls 13 and 15 of the fixed frame 10.

The winding spool unit 40 includes a torsion spring 41 accommodated in the housing 90 and a spring seat 43 abutting the side portion 13 of the fixed frame 10 so as to generate a restoring force for pulling out the drawn- .

The locking unit 50 stops the rotation of the spool 30 when the seat belt acceleration of the seat belt exceeds a predetermined value. The locking unit 50 includes a control disc 51, a latch 53, and a locking arm 55.

The control disc 51 is coupled to the spool shaft 33 of the spool 30 via the bush 52 and rotates together with the spool 30 and has an external tooth portion 51a formed on the outer periphery thereof.

The latch 53 is pivotally mounted between the spool 30 and the control disc 53 and normally rotates together with the spool 30 and the control disc 51. The latch 53 includes a latch tooth portion 53a which is pivotally rotated when the vehicle is decelerated and is engaged with a toothed portion 15a formed in the fixed frame 15. [

The locking arm 55 is installed on the other side of the control disc 51 so as to be rotatable together with the control disc 51. The locking arm 55 operates as an inertial mass when the vehicle is decelerated to generate a locking column 91 formed inside the housing 90, Respectively.

The vehicle sensor unit 60 is operated upon rapid deceleration of the vehicle to restrain the control disk 51, thereby preventing the spool 30 from rotating. The vehicle sensor unit 60 includes a carrier portion 61, an inertia body 63, and a sensor lever 65. [

The tubular body 63 can be arranged in an upright position on the contact surface (described later) of the carrier portion 61 and can be tilted in the carrier portion 61 when the vehicle is rapidly decelerated.

The sensor lever 65 is coupled to the tubular body 63 in a form-fit manner and has a locking tip 65a which is engaged with the external tooth portion 51a of the control disk 51. [ The carrier portion 61 is coupled to the inside of the housing 90 through the sensor adapter 67.

Fig. 4 is a partial perspective view showing a state in which the vehicle sensor unit is mounted in the housing of the present invention, Fig. 5 is a longitudinal sectional view showing the configuration of the vehicle sensor unit of the present invention, Fig.

4 to 6, the vehicle sensor unit 60 is fixedly coupled to a predetermined position inside the housing 90 through the sensor adapter 67. [

A contact surface 61a is formed in the carrier portion 61 and an inertial body 63 is mounted on the contact surface 61a. The tubular member 63 includes an extended portion 63a, and a hole 63c is formed in the extended portion 63a. Shaped portion 65b of the sensor lever 65 is coupled through the hole 63c of the extended portion 63a in a shape-fitting manner. The sensor lever 65 includes a locking tip 65a which is caught by the external tooth portion 51a of the control disk 51 when the inertia body 63 is moved beyond its predetermined position by exceeding a predetermined acceleration value .

The sensor adapter 67 includes a mounting boss 67a into which the mounting projection 61b of the carrier portion 61 is inserted. The mounting projection 61b of the carrier portion 61 can be engaged with the mounting boss 67a without interference.

The mounting protrusion 61b of the carrier portion 61 can be mounted on the mounting boss 67a of the sensor adapter 67 while being rotated at various angles. Thus, when the retractor 1 is mounted in the vehicle body at a predetermined angle inclined posture, the vehicle sensor unit 60 can be mounted at various angles from the reference position in the housing 90.

7 is a view showing a vehicle sensor unit mounted in a state where the retractor of the present invention is mounted in a state of being tilted at a predetermined angle and inclined at a predetermined angle from a reference position in the housing.

Referring to Fig. 7, a state in which the vehicle sensor unit 60 is mounted at a predetermined angle [theta] from the reference position C of the housing 90 is shown.

Referring to Fig. 1, the retractor 1 can be mounted on the vehicle body in various mounting positions (H, R, L). Hereinafter, the retractor 1 will be described as an example in which the retractor 1 is inclined (R) from the horizontal posture H to the right.

1, 5 and 7, when the retractor 1 is mounted on the vehicle body in a state in which the retractor 1 is tilted to the right by a predetermined angle?, The reference surface of the inertial body 63, that is, The vehicle sensor unit 60 is slantly mounted at a predetermined angle? From the reference position C of the housing 90 in order to maintain the contact surface 61b of the housing 90 in a horizontal position. The rotation angle of the vehicle sensor unit 60 with respect to the reference position C of the housing 90 is substantially equal to the mounting angle of the retractor 1. [

When the retractor 1 is inclined to the right as described above, the control disc 51 can be moved in the direction of the arrow A along the direction in which the retractor 1 is tilted by the assembly tolerance. In this case, the distance D between the sensor lever 65 and the locking tip 65a is reduced, and as a result, sensitive sensing is performed, and a desired locking operation can not be performed. Therefore, the mounting angle of the retractor 1 is limited. For example, the maximum mounting angle at which the retractor 1 can be tilted from the horizontal posture is required to be limited to 30 degrees. That is, the maximum mounting angle [theta] [deg.] Of the vehicle sensor unit 60 to the reference position C of the housing 90 is required to be limited to 30 [deg.].

The sensor lever 65 of the present invention is configured to have a structure capable of further increasing the retractor mounting angle. To this end, the end of the locking tip 65a of the sensor lever 65 is formed with an inclined portion 62 inclined at a predetermined angle? The angle alpha of the inclined portion 62 may be 10 to 25 degrees. With this configuration, the maximum mounting angle [theta] [deg.] Of the vehicle sensor unit 60 can be increased.

When the retractor 1 is mounted in the posture L tilted to the left from the horizontal posture H, the inclined portion of the locking tip of the sensor lever 65 is formed in a vertically symmetrical shape with the shape of the locking tip in Fig. .

Fig. 8 is a plan view showing a state in which the locking preventing unit of the vehicle sensor unit according to the present invention is mounted on the housing in the locked state, Fig. 9 is an exploded perspective view showing the constitution of the locking preventing unit of the vehicle sensor unit of the present invention, 10 is an enlarged view of the X display portion of Fig.

1 and 8 to 10, the retractor 1 restrains the sensor lever 65 of the vehicle sensor 60 even when the retractor 1 is tilted while the seatbelt is pulled out, And an anti-lock unit 70 for preventing the disc 65 from being engaged with the external tooth portion 51a of the control disc 51. [

The locking preventing unit 70 includes an eccentric disc 71 and a ring member 73. [ The eccentric disc 71 is eccentric with the spool shaft 33 and comes into contact with the disc tooth portion 71a and the ring member 73 which are engaged with the internal tooth portion 93 in the housing 90, And a drive projection 71b for rotating the drive projection 71b.

The ring member 73 is rotatably installed in the housing 90 so as to move to the locking position P1 for restraining the sensor lever 65 and the unlocking position P2 for releasing the restraint of the sensor lever 65, The ring member (73) is provided concentrically with the spool shaft (33). The ring member 73 has a stopper 73a selectively in contact with the locking tip 65a of the sensor lever 65 in the locked state of the sensor lever 65 and a stopper 73a selectively in the locked position P1 and the unlocked position P2 And has a contact pin 73b which is rotatably contacted with the drive projection 71b of the eccentric disc 71. [

The stopper 73a protrudes outside the ring member 73 along the radial direction of the ring member 73 and the contact pin 73b protrudes in the axial direction of the ring member 73. [

Fig. 8 shows the cut-off state of the vehicle sensor 60. Fig. The stopper 73a of the ring member 73 is below the locking tip 65a of the sensor lever 65 and the locking tip 65a of the sensor lever 22 is located outside the external teeth 20 of the control disc 51. [ And is held on the outer side without being caught by. Therefore, when the seat belt is fed, the eccentric disc 71 is driven in the direction of the arrow 75 until the seat belt is completely wound, and the stopper 73a is moved to a position P1). Therefore, when the seat belt is wound, it is ensured that the vehicle sensor 60 does not react even when the position of the retractor is changed.

11 is a plan view showing a state in which the locking preventing unit of the vehicle sensor unit of the present invention is mounted on the housing in the unlocked state.

Referring to Fig. 11, when the seat belt is released from the retractor, the eccentric disc 71 is rotated together with the drive projection 71b in the direction opposite to Fig. 8, and then the ring member 73 is rotated in the direction opposite to Fig. As a result, the stopper 73a of the ring member 73 is moved to a position where it is released from the locking tip 65a of the sensor lever 65, and is positioned below the body of the sensor lever 65. [ Therefore, the sensor lever 65 can be made to interact with the external tooth portion 51a of the control disk 51 when the vehicle sensor 60 is reacted.

FIG. 12 is a perspective view showing the configuration of a sensor lever of the vehicle sensor unit of the present invention, and FIG. 13 is a partial plan view showing an unlocked state of an anti-lock unit of the vehicle sensor unit of the present invention.

12, the sensor lever 65 is rotated by the rotation of the ring member 73 to the unlocking position P2 so that the stopper 73a of the ring member 73 is rotated from the locking tip 65a of the sensor lever 65 It is possible to prevent the sensor lever 65 from interfering with the stopper 73a when the sensor lever 65 is located under the main body of the sensor lever 65. [

The sensor lever 65 has an interference preventing groove 65f formed by cutting off a portion corresponding to the stopper 73a of the ring member 73 while the ring member 73 is rotated to the unlocking position P2. .

With such a configuration, the stopper 73a of the ring member 73 is prevented from interfering with the sensor lever 65 when the vehicle is traveling, so that a smooth vehicle sensor function can be performed.

In another embodiment, a separate noise preventing layer for preventing noise may be formed on the upper surface of the stopper 73 or the sensor lever 65 or the stopper 65 corresponding to the stopper 73a of the ring member 73.

Although the present invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the present invention is not limited thereto but is limited by the following claims. Accordingly, those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the spirit of the following claims.

1: Retractor 10: Fixed frame
30: spool 33: spool shaft
51: Control disk 51a: External tooth
60: vehicle sensor 61: carrier part
63: inertial body 65: sensor lever
65a: Locking tip 65f: interference prevention groove
70: locking preventing unit 71: eccentric disc
71a: Disk tooth portion 71b: Driving projection
73: ring member 73a: stopper
73b: contact pin 90: housing

Claims (6)

A fixed frame connected to the vehicle body;
A spool mounted rotatably about an axis disposed in a direction set in the fixed frame and the seat belt is externally sensed;
A control disk connected to the rotating shaft of the spool to rotate together and having an external tooth portion; And
An inertial body which is installed in a housing fixed to one side of the fixed frame and which is provided in a space having a clearance inside the carrier part and which swings due to inertia generated when the speed of the vehicle is abruptly reduced, And a locking tip that is spaced apart from the outer teeth by the flow of the tubular body and is spaced apart from the outer teeth and interferes with the rotation of the control disk And a vehicle sensor unit including a sensor lever,
Wherein the locking tip has at least one locking tip at one side to compensate for a case where the control disc is moved toward the axis to narrow the spaced distance when the locking frame is tilted to the vehicle body, And an inclined portion inclined at an angle set toward the other side so as to correspond to the narrowed interval,
The seat belt retractor having a vehicle sensor. delete 2. The method of claim 1, wherein the angle of the ramp portion of the locking tip
When the retractor is installed to be inclined at a predetermined angle from the horizontal state, only when the end portion of the locking tip is pushed and moved by the flow of the tubular member, the locking tip is interposed between the locking tip and the external toothed portion To form the spaced apart spacing formed,
The vehicle sensor unit not being greater than the angle mounted on the housing
The seat belt retractor comprising: 4. The seat belt retractor according to claim 3, wherein the angle of the inclined portion of the locking tip is 10 to 25 degrees. The locking device according to claim 1, further comprising an anti-locking unit for restricting the sensor lever to prevent the sensor lever from being engaged with the external tooth portion of the control disk while the retractor is tilted while the seatbelt is being pulled out ≪ / RTI &
Wherein the locking preventing unit is rotatably supported at a locking position for restraining the sensor lever in the housing and an unlocking position for releasing restraint of the sensor lever, A ring member having a contact pin for allowing rotation to the locking position and the unlocking position,
And an eccentric disc having a disc tooth portion eccentric with the center of the spool and engaging with an internal tooth portion in the housing, and a drive projection for rotating the ring member in contact with the contact pin of the ring member,
And the sensor lever has a vehicle sensor configured to avoid interference with the stopper of the ring member when the ring member is rotated to the unlocking position. The seat belt retractor according to claim 5, wherein the sensor lever includes a seat belt having a vehicle sensor including an interference prevention groove formed by cutting a portion corresponding to the stopper of the ring member in a state where the ring member is rotated to the unlocking position tractor.

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