CN212980135U - Safety belt retractor and automobile - Google Patents

Abstract

The utility model provides a safety belt coiler and car. The seatbelt retractor includes: the automatic locking device comprises a base, a ratchet wheel, a pawl, an automatic locking driving mechanism and a sensitivity adjusting mechanism; the ratchet wheel is rotatably arranged on the base; the first end of the pawl is hinged to the base, and the second end of the pawl is used for locking the ratchet wheel; the automatic locking driving mechanism is used for driving the pawl to lock the ratchet wheel; the sensitivity adjusting mechanism comprises a rotating piece and a spring piece; the rotating member is rotatably installed on the base, the first end of the elastic sheet is fastened on the rotating member, the second end of the elastic sheet is connected to the bottom of the second end of the pawl, and the rotating member can drive the elastic sheet to rotate so as to drive the second end of the pawl to be far away from or close to the ratchet wheel. The automobile comprises an automobile body and the safety belt retractor arranged in the automobile body. The utility model discloses a fix the one end of shell fragment on rotatable rotating member to can adjust the initial distance of pawl and ratchet through the rotation of rotating member, realize the regulation of sensitivity.

Description

Safety belt retractor and automobile

Technical Field

The utility model relates to a safe technical field especially relates to a safety belt coiler and car.

Background

The safety belt retractor is a retractor with an emergency locking function, is a core component of an automobile safety belt, and can realize emergency locking when a vehicle is inclined, suddenly accelerated, suddenly decelerated and the like.

In the prior art, a safety belt retractor usually comprises a ratchet wheel, a pawl, a bouncing ball and a rotating arm, wherein the pawl is used for locking the ratchet wheel, the pawl is connected with one end of an elastic sheet to reset the pawl, and the other end of the elastic sheet is fixedly arranged on a mounting support. One end of the pawl is connected with the rotating arm so as to drive the pawl to lock the ratchet wheel. When the automobile jolts, the bouncing ball bouncing upwards can drive the rotating arm to rotate towards the direction close to the ratchet wheel, so that the pawl connected with the rotating arm is driven to rotate towards the ratchet wheel, and the ratchet wheel is locked.

However, since the sensitivity of the pawl locking ratchet wheel in the prior art cannot be adjusted, when the vehicle passes through a road surface with small bumping degree, if the sensitivity of the seat belt retractor is too high, the webbing of the seat belt brings oppressive feeling to the driver, and the driving comfort of the driver is affected.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a safety belt coiler and car to solve vehicle safety belt coiler locking sensitivity and can not adjust, influence the problem of driving the travelling comfort.

An embodiment of the utility model provides a safety belt retractor, include: the automatic locking device comprises a base, a ratchet wheel, a pawl, an automatic locking driving mechanism and a sensitivity adjusting mechanism;

the ratchet wheel is rotatably arranged on the base;

the first end of the pawl is hinged on the base, and the second end of the pawl is used for locking the ratchet wheel;

the automatic locking drive mechanism includes: the top end of the driving arm is provided with an installation seat with an opening, a bouncing small ball accommodated in the installation seat and a driving arm; the mounting seat is fastened on the base; the driving arm covers the opening at the top end of the mounting seat, the first end of the driving arm is hinged to the mounting seat, and the second end of the driving arm can abut against the bottom of the second end of the pawl;

the sensitivity adjustment mechanism includes: a rotating piece and a spring plate; the rotating piece is rotatably installed on the base, the first end of the elastic sheet is fastened on the rotating piece, the second end of the elastic sheet is connected to the bottom of the second end of the pawl, and the rotating piece can drive the elastic sheet to rotate so as to drive the second end of the pawl to be far away from or close to the ratchet wheel.

The safety belt retractor provided by the utility model is fixed on the rotating piece through the first end of the elastic sheet, and the rotating piece can rotate on the base, when the rotating piece rotates, the second end of the elastic sheet can be driven to pull the bottom of the pawl, so that the initial distance between the pawl and the ratchet wheel is changed; when the rotating piece is rotated to enable the second end of the pawl to be far away from the ratchet wheel, the acting force of the pawl to be locked by the rotating arm arranged on the automatic locking driving mechanism is large, and the sensitivity of the safety belt retractor is reduced; when the rotating piece is rotated to enable the second end of the pawl to be close to the ratchet wheel, the acting force of the rotating arm arranged on the automatic locking driving mechanism for driving the pawl to lock the ratchet wheel is reduced, and the sensitivity of the safety belt retractor is improved; thereby realizing the sensitivity adjustment of the safety belt retractor.

In a possible implementation manner of the above safety belt retractor, the first end of the elastic sheet is provided with a fastener, the rotating member is provided with a clamping groove matched with the fastener, and the fastener is clamped in the clamping groove.

In one possible embodiment, the rotating member comprises: dwang and spacing seat, the rotatable installation of spacing seat is in on the base, the dwang is installed on the spacing seat and the dwang perpendicular to spacing seat, the draw-in groove is located on the dwang and the length of draw-in groove with the length of dwang is the same.

In a possible embodiment, the limiting seat includes a bottom plate, a cylindrical boss located on the bottom plate, and a damping portion disposed on the boss, the base is provided with a mounting through hole, the boss is rotatably mounted in the mounting through hole, and the damping portion is configured to provide additional frictional resistance to relative rotation between the boss and the base; the dwang sets up perpendicularly on the boss.

In a possible embodiment, the damping portion is at least one protrusion disposed on the top of the boss and extending outward, and a bottom plane of the protrusion is in contact with a surface of the base.

In a possible embodiment, a plurality of said projections are distributed along the circumference of said boss.

In a possible embodiment, the damping portion is a damping rubber ring sleeved outside the boss.

In a possible embodiment, the rotating rod, the boss and the damping portion are formed as a single piece through an integral molding process.

In a possible implementation manner, a second limit boss close to the rotating member is arranged on the base, and the second limit boss is used for limiting the rotation angle of the elastic sheet.

The utility model also provides a car, including the automobile body to and set up in the automobile body as above the safety belt coiler.

By arranging the safety belt retractor on the automobile, the sensitivity of the safety belt retractor can be adjusted, so that the riding comfort of a passenger is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural view of a seat belt retractor according to an embodiment of the present invention;

FIG. 2 is an enlarged view of part A of FIG. 1;

FIG. 3 is an enlarged view of a portion B of FIG. 1;

FIG. 4 is a schematic view of a fastening member according to an embodiment of the present invention;

fig. 5 is a front view of a rotating member according to an embodiment of the present invention;

fig. 6 is a top view of a rotating member according to an embodiment of the present invention;

fig. 7 is a schematic view illustrating a clockwise rotation of a rotating member of a seatbelt retractor according to an embodiment of the present invention;

fig. 8 is a schematic view illustrating the counterclockwise rotation of the rotating member of the seatbelt retractor according to an embodiment of the present invention.

Description of reference numerals:

10-a base;

11-a first limit boss;

12-a second limit boss;

20-ratchet wheel;

30-an automatic locking driving mechanism;

31-a rotating arm;

32-beating pellets;

33-a mounting seat;

40-pawl;

50-a sensitivity adjustment mechanism;

51-a spring plate;

511-a snap;

512-card head portion;

513-a mounting section;

52-a rotating member;

521-rotating rods;

522-damping part;

523-boss;

524-a bottom plate;

525-limit seat;

526-card slot.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present specification, reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The safety belt retractor is a core component of an automobile safety belt, when a vehicle suddenly receives an inertia force during driving, for example, when the vehicle suddenly brakes or turns sharply, a passenger can not autonomously tilt forward or left or right under the action of the inertia force, and at the moment, the safety belt can play a role in preventing the passenger from colliding with a windshield forward or avoiding the passenger from being injured due to left or right collision, and a device for realizing the emergency locking function is the safety belt retractor.

When the vehicle runs on a bumpy road surface, the locking device in the safety belt retractor can be triggered to lock the mesh belt, but the driving process is different in the mesh belt locking effect due to the fact that the sensitivity of the safety belt locking devices produced by different manufacturers is different. When the sensitivity of the locking device is very high, when the vehicle passes through a bumpy road surface, the woven belt can bring oppressive feeling to a passenger due to continuous locking and loosening of the locking device, so that the driving comfort is influenced; when the sensitivity of the locking device is too low, the occupant feels that the seat belt is not operated, and the safety of the occupant is affected.

Among the prior art, safety belt coiler's pawl is connected with the one end of shell fragment, and the other end of shell fragment is fixed on the base, and this kind of structural style's shell fragment only has a state of drawing the pawl, and can't adjust, therefore safety belt locking sensitivity also has a state, hardly satisfies the demand of driving travelling comfort and security. And the core component who realizes locking device sensitivity adjustment in the safety belt coiler is the shell fragment that links to each other with the pawl, and the pawl makes its swinging boom that sets up on with automatic locking actuating mechanism offset through the effect of this shell fragment, and this swinging boom is driven to the beating force that the bobble that beats produced through setting up in this automatic locking actuating mechanism, and in rethread swinging boom pushed the pawl into the tooth of ratchet to realize the locking of safety belt.

The utility model discloses an adjustment mechanism adjusts the distance of pawl free end and ratchet to the realization is to the regulation of its sensitivity. Specifically, a resilient tab abutting the free end of the pawl is mounted on a rotatable member so that the position of the free end of the pawl relative to the ratchet wheel can be adjusted by rotating the member. When one end of the elastic sheet pulls the free end of the pawl to be far away from the ratchet wheel, the free end of the pawl can move upwards to be locked with the ratchet wheel only by a larger acting force, and the sensitivity of the safety belt retractor is reduced; when one end of the elastic sheet pushes the free end of the pawl to be close to the ratchet wheel, the free end of the pawl can move upwards and be locked with the ratchet wheel through smaller acting force, and the sensitivity of the safety belt retractor is improved.

Some alternative embodiments are described in detail below with reference to the accompanying drawings.

Example one

Fig. 1 is a schematic structural diagram of a seat belt retractor provided in the present embodiment; FIG. 2 is an enlarged view of part A of FIG. 1; FIG. 3 is an enlarged view of a portion B of FIG. 1; FIG. 4 is a schematic view of the fastener of the present embodiment; FIG. 5 is a front view of the rotary member provided in this embodiment; FIG. 6 is a top view of the rotating member provided in this embodiment; fig. 7 is a schematic view illustrating clockwise rotation of the seatbelt retractor rotating member according to the present embodiment; fig. 8 is a schematic view illustrating counterclockwise rotation of the seatbelt retractor rotating member according to the present embodiment. Referring to fig. 1 to 8, the seatbelt retractor includes a base 10, a ratchet 20, a pawl 40, an automatic lock driving mechanism 30, and a sensitivity adjustment mechanism 50.

Referring to fig. 1, a ratchet 20 is rotatably mounted on a base 10; a first end of pawl 40 is hinged to base 10 and a second end of pawl 40 is used to lock ratchet 20.

Specifically, the ratchet 20, which is a main component of the locking device, is connected to the revolving portion of the webbing, and the locking device locks the ratchet 20 by driving the pawl 40 to rotate to effect the deadlocking of the webbing; the second end of the pawl 40 is rotatable about its hinge point at the first end of the base 10. optionally, a first limit projection 11 is provided on the base 10 to limit the range of rotation of the pawl 40. as shown in fig. 1, the first limit projection 11 is provided near the second end of the pawl 40.

With continued reference to fig. 1, the automatic lock drive mechanism 30 includes: a mounting base 33 having an opening at the top end, a bounce ball 32 and a driving arm 31 accommodated in the mounting base 33; the mounting seat 33 is fastened on the base 10; the driving arm 31 is covered on the top opening of the mounting seat 33, and the first end of the driving arm 31 is hinged on the mounting seat 33, and the second end of the driving arm 31 can abut against the bottom of the second end of the pawl 40.

Specifically, the mounting seat 33 is fixed to the base 10, the driving arm 31 is provided at an opening of the mounting seat 33, the driving arm 31 can cover the opening at the top end of the mounting seat 33, partial accommodating cavities for accommodating the bouncing balls 32 are formed at the bottom of the driving arm 31 and in the mounting seat 33, respectively, and the bouncing balls 32 are arranged in the accommodating cavities. When the vehicle is braked suddenly, turned suddenly or driven on a bumpy road, the bouncing ball 32 bounces freely in the accommodating cavity due to inertia, and because the first end of the driving arm 31 is hinged at the open end of the mounting seat 33, when the bouncing ball 32 bounces upwards, the bouncing ball collides with the driving arm 31 and pushes the driving arm open, so that the second end of the driving arm 31 rotates at an angle around the hinged position of the first end, and the second end of the pawl 40 is pushed to rotate clockwise in the drawing, and the locking with the ratchet wheel 20 is realized.

Alternatively, the bouncing ball 32 may be configured as a steel ball, but may also be a ball made of other materials.

With continued reference to fig. 1, the sensitivity adjustment mechanism 50 includes: a rotary member 52 and a spring plate 51; the rotating member 52 is rotatably mounted on the base 10, a first end of the elastic piece 51 is fastened on the rotating member 52, a second end of the elastic piece 51 is connected to a bottom of a second end of the pawl 40, and the rotating member 52 can drive the elastic piece 51 to rotate so as to drive the second end of the pawl 40 to be far away from or close to the ratchet 20.

Specifically, the elastic sheet 51 is used for tensioning the second end of the pawl 40 to make the second end of the pawl 40 abut against the second end of the rotating arm 31, and after the pawl 40 locks the ratchet 20, the elastic sheet 51 can realize the resetting of the pawl 40 to release the locking of the pawl 40 and the ratchet 20.

Optionally, the second end of the elastic sheet 51 is connected to the bottom of the second end of the pawl 40, the first end of the elastic sheet 51 is fixed on the rotating member 52, and since the rotating member 52 is rotatably mounted on the base 10, the second end of the elastic sheet 51 can drive the second end of the pawl 40 to approach the ratchet wheel 20 or be away from the ratchet wheel 20 by rotating the rotating member 52 clockwise or counterclockwise, so as to change the sensitivity of the seatbelt retractor. For example, when the rotating element 52 rotates clockwise, the elastic sheet 51 can drive the second end of the pawl 40 to approach the ratchet 20, so that the rotating arm 31 only needs a small driving force to drive the pawl 40 to lock the ratchet 20, and therefore the rotating arm 31 can drive the pawl 40 to rotate more easily, i.e. the sensitivity is improved; when the rotating member 52 rotates counterclockwise, the spring 51 drives the second end of the pawl 40 away from the ratchet 20, so that the rotating arm 31 requires a larger driving force to drive the pawl 40 to lock the ratchet 20, and thus the driving of the pawl 40 becomes difficult, i.e., the sensitivity decreases.

The utility model discloses during the safety belt coiler specifically uses, use the vehicle to travel on the road surface of jolting as the example, the vehicle is because the road surface unevenness on the road surface of jolting, beat ball 32 in the safety belt coiler is at the in-process of jolting, because inertial action collision swinging boom 31 makes it upwards rotate, thereby it sets up the pawl 40 in swinging boom 31 second end top to go up the top, pawl 40's second end rotates certain angle and locking ratchet 20 around the pin joint of pawl 40 on base 10, because ratchet 20 is connected with the portion of revoluting of meshbelt, when ratchet 20 locking, correspondingly, the pivot of meshbelt is also locked, the messenger revolutes the portion and can not continue the unwrapping wire, so the meshbelt just can not extend again, thereby can prevent that the health from continuing to empty. On the road surface of jolting, if the safety belt sensitivity is too high, the safety belt coiler will constantly lock and loosen, leads to the passenger to have great locking oppression to feel, and at this moment, accessible anticlockwise rotation rotating member 52 makes the sensitivity of safety belt coiler reduce to improve the travelling comfort of driving.

Referring to fig. 7 and 8, the present invention connects one end of the elastic sheet 51 affecting the sensitivity of the seatbelt retractor to the bottom of the pawl 40, and the other end is fixed to the rotatable rotating member 52, so that the elastic sheet 51 can drive the second end of the pawl 40 to be close to or away from the ratchet 20. Specifically, as shown in fig. 8, when the rotating member 52 rotates counterclockwise, the first end of the elastic sheet 51 is fixed on the rotating member 52 and can rotate along with the rotating member 52, so that the second end of the elastic sheet 51 can drive the pawl 40 to be away from the ratchet 20, the relative distance between the pawl 40 and the ratchet 20 becomes longer, and the jumping ball can drive the pawl to lock the ratchet by a larger acting force, thereby reducing the sensitivity; similarly, as shown in fig. 7, when the rotating member 52 rotates clockwise, the pawl 40 is driven to approach the ratchet 20, and the relative distance between the pawl 40 and the ratchet 20 is reduced, so that the driving of the automatic locking driving mechanism 30 is changed easily, i.e. the sensitivity is improved. The sensitivity of the safety belt retractor is adjusted adaptively by twisting the rotating member 52 to a proper position, so that the oppressive feeling of the webbing on a human body on different bumpy roads is reduced, and the driving comfort of a passenger can be improved.

Referring to fig. 2 to 4, in a possible implementation manner, a first end of the elastic sheet 51 is provided with a snap piece 511, and the snap piece 511 may be fastened to the first end of the elastic sheet 51 by a fastener such as a screw, or may be fixed to the first end of the elastic sheet 51 by welding; similarly, the second end of the resilient plate 51 may be mounted in a slot at the bottom of the pawl 40 by a fastener such as a screw, or may be fixed to the bottom of the pawl 40 by welding.

Referring to fig. 2 and 4, optionally, the latch 511 includes a mounting portion 512 and a clamping portion 513, wherein a groove is provided in the mounting portion 512, the elastic sheet 51 is inserted into the groove, and a first end of the elastic sheet 51 is fixed in the groove by a fastener such as a screw, and the mounting form of the fastener is adopted to facilitate replacement of the accessory; the chuck portion 513 is disposed at one end of the mounting portion 512, and optionally, the chuck portion 513 may be configured as a substantially T-shaped structure, and correspondingly, a clamping groove 526 adapted to the chuck portion 513 is disposed on the rotating member 52, and the clamping groove 526 may be configured as a substantially T-shaped groove. The elastic sheet 51 is clamped into a clamping groove 526 formed in the rotary member 52 through a clamping head part 513 arranged on the clamping part 511 to realize position limitation, and when the rotary member 52 rotates, the rotary member 52 can drive the elastic sheet 51 to rotate together.

Referring to fig. 5 and 6, in one possible embodiment, the rotating member 52 may include: dwang 521 and spacing seat 525, the rotatable installation of spacing seat 525 on base 10, dwang 521 install on spacing seat 525 and dwang 521 perpendicular to spacing seat 525, draw-in groove 526 locate the dwang 521 on and the length of draw-in groove 526 is the same with the length of dwang 521.

Specifically, the rotating rod 521 is used as a knob portion of the rotating member 52, and the rotating rod 521 is rotated to drive the elastic sheet 51 to rotate. In order to make the rotating rod 521 rotatable, in a possible implementation manner, it can be implemented by rotatably mounting the limiting seat 525 disposed at the bottom of the rotating rod 521 on the base 10, that is, the rotating rod 521 can drive the limiting seat 525 to rotate together on the base 10, that is, the limiting seat 525 can limit the position of the rotating rod 521 on the base 10, that is, the limiting seat 525 can only rotate on the base 10 and cannot move up and down. Optionally, the rotating rod 521 is vertically disposed on the limiting seat 525, and the locking groove 526 is disposed on the rotating rod 521. In order to facilitate the clamping of the latch 511, the length of the latch groove 526 is set to be the same as the length of the rotating rod 521, that is, the latch groove 526 penetrates from one end of the rotating rod 521 to the other end of the rotating rod 521, the latch 511 is inserted into the latch groove 526 from one end of the rotating rod 521, and can slide in the length direction of the latch groove 526 to realize the self-adaptive adjustment of the installation height, so as to meet the requirement that the elastic sheet 51 is installed at different installation heights from the plane of the base 10.

With continued reference to fig. 5 and 6, in order to realize the rotation of the limiting seat 525 on the base 10, optionally, the limiting seat 525 includes a bottom plate 534, a cylindrical boss 523 located on the bottom plate 534, and a damping portion 522 disposed on the boss 523, the base 10 is provided with a mounting through hole, the boss 523 is rotatably mounted in the mounting through hole, and the damping portion 522 is configured to provide additional frictional resistance for the relative rotation of the boss 523 and the base 10; the rotating lever 521 is vertically disposed on the boss 523.

That is to say, the limiting seat 525 limits the position through the boss 523, the bottom plate 534 disposed at the bottom of the boss 523, and the damping portion 522 disposed at the top of the boss 523, specifically, an installation through hole for installing the boss 523 is disposed on the base 10, and the boss 523 is in clearance fit with the installation through hole, so that the boss 523 can rotate in the installation through hole. In order to prevent the boss 523 from moving up and down, the bottom plate 534 abuts against the reverse surface of the plate body of the base 10, and the damping part 522 abuts against the front surface of the plate body of the base 10, that is, the position is limited by clamping the bottom plate 534 and the damping part 522. The damping portion 522 is used to provide additional frictional resistance for the relative rotation of the boss 523 and the base 10, that is, the frictional resistance between the damping portion 522 and the base 10 can prevent the rotating member 52 from automatically twisting and resetting under the elastic force of the elastic sheet 51 after rotating a certain angle, so that the adjustment is not effective. Optionally, the rotating rod 521 is vertically disposed on the top of the boss 523, the boss 523 may be disposed in a cylindrical shape, and the rotating rod 521 may also be disposed in a cylindrical shape, wherein the rotating rod 521 and the boss 523 share a central axis, so that the rotating rod 521 is convenient to rotate.

In order to facilitate the installation of the limiting seat 525, the connection form of the bottom plate 534 of the limiting seat 525 and the boss 523 can be a threaded connection form, that is, a threaded hole is formed at the bottom of the boss 523, correspondingly, a threaded protrusion is formed on one surface of the base 10, and after the boss 523 is installed in the installation through hole on the base 10, the bottom plate 534 is installed at the bottom of the boss 523, so that the damping part 522 and the surface of the base 10 have a certain pressing force, and the damping effect is improved.

Referring to fig. 5 and 6, the damping part 522 may be, for example, a bump disposed on the top of the boss 523 and extending outward, and the bottom plane of the bump is in contact with the surface of the base 10. Of course, the bump can also be arranged on the side wall of the boss 523 as long as the surface contact with the base 10 can be satisfied, and the corresponding frictional resistance is provided, the utility model discloses do not limit the position of the concrete setting on the boss 523 of bump. Additional frictional resistance is provided for relative rotation of the boss 523 and the base 10 by the bottom planar surface of the boss contacting the surface of the base 10. Obviously, the larger the contact area between the protrusion and the surface of the base 10, the larger the friction resistance provided, the less the rotary member 52 can not be restored, and alternatively, the protrusion may be provided in plurality and distributed along the circumference of the cylindrical boss 523, so that the friction resistance of the rotary member 52 is uniformly distributed, and the damping effect can be further improved while the rotary member 52 is rotatable.

In a possible implementation, dwang 521, boss 523 and damping part 522 are the fashioned integrative piece through integrated into one piece technology, and this integrated into one piece technology can be injection moulding or other shaping modes, the utility model discloses do not do specific restriction, can reduce the manufacturing degree of difficulty through integrated into one piece technology, improve bulk strength. Of course, the rotating rod 521, the boss 523 and the damping portion 522 may be in a separate structure, that is, the rotating rod 521 and the boss 523 may be in a threaded connection, and the damping portion 522 and the boss 523 may be fixed thereto by a fastener such as a screw.

Optionally, the damping portion 522 may also be a damping rubber ring sleeved outside the boss 523, and the damping rubber ring is in surface contact with the base 10, so that the damping effect is good, the installation is convenient, and the manufacturing cost is reduced.

Referring to fig. 1 and 2, in order to enable the elastic sheet 51 to be mounted on the rotating member 52 and rotate within a certain range, so as not to cause the sensitivity to be too high or too low, a second limiting boss 12 close to the rotating member 52 and used for limiting the rotation angle of the elastic sheet 51 are disposed on the base 10. Two second limit projections 12 may be provided for limiting the clockwise or counterclockwise rotation range of the rotary member 52. Alternatively, when the damping portion 522 is a projection, when the projection is disposed at a proper position, the second limit projection 12 may also be disposed as only one, that is, one of the projections of the damping portion 522 may contact with the second limit projection 12 to block the rotation of the rotating member 52.

Example two

The embodiment also provides an automobile which comprises an automobile body and the safety belt retractor arranged in the automobile body. The safety belt retractor is arranged on one side of a seat in the vehicle body, and a mesh belt revolves in the safety belt retractor. When the automobile brakes suddenly or turns sharply, the safety belt plays a role in preventing the passengers from continuously toppling due to inertia. And go on the road surface of jolting when the car, the safety belt coiler also can be continuous locking, if the sensitivity of safety belt coiler is too high, can bring the sense of oppression for the passenger, can reduce the sensitivity of safety belt coiler through rotating member 52 to improve the travelling comfort of driving.

The safety belt retractor in the embodiment has the same structural function as that in the embodiment, and the details are not repeated.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A safety belt retractor is characterized by comprising a base, a ratchet wheel, a pawl, an automatic locking driving mechanism and a sensitivity adjusting mechanism;

the ratchet wheel is rotatably arranged on the base;

the first end of the pawl is hinged on the base, and the second end of the pawl is used for locking the ratchet wheel;

the automatic locking drive mechanism includes: the top end of the driving arm is provided with an installation seat with an opening, a bouncing small ball accommodated in the installation seat and a driving arm; the mounting seat is fastened on the base; the driving arm covers the opening at the top end of the mounting seat, the first end of the driving arm is hinged to the mounting seat, and the second end of the driving arm can abut against the bottom of the second end of the pawl;

the sensitivity adjustment mechanism includes: a rotating piece and a spring plate; the rotating piece is rotatably installed on the base, the first end of the elastic sheet is fastened on the rotating piece, the second end of the elastic sheet is connected to the bottom of the second end of the pawl, and the rotating piece can drive the elastic sheet to rotate so as to drive the second end of the pawl to be far away from or close to the ratchet wheel.

2. The seatbelt retractor according to claim 1, wherein a latch is disposed at a first end of the resilient member, and a slot adapted to the latch is disposed on the rotating member, and the latch is engaged with the slot.

3. The seatbelt retractor according to claim 2, wherein the rotating member includes: dwang and spacing seat, the rotatable installation of spacing seat is in on the base, the dwang is installed on the spacing seat and the dwang perpendicular to spacing seat, the draw-in groove is located on the dwang and the length of draw-in groove with the length of dwang is the same.

4. The seatbelt retractor according to claim 3, wherein the stopper seat includes a base plate, a cylindrical boss on the base plate, and a damping portion provided on the boss, the base plate having a mounting through hole, the boss being rotatably mounted in the mounting through hole, the damping portion being configured to provide additional frictional resistance to relative rotation of the boss and the base plate; the dwang sets up perpendicularly on the boss.

5. The seatbelt retractor according to claim 4, wherein the damping portion is at least one projection provided at a top of the boss and extending outward, a bottom plane of the projection being in contact with a surface of the base.

6. The seatbelt retractor according to claim 5, wherein a plurality of the projections are distributed along a circumferential direction of the boss.

7. The seatbelt retractor according to claim 4, wherein the damping portion is a damping rubber ring fitted over the boss.

8. The seatbelt retractor according to claim 4, wherein the rotating lever, the boss and the damping portion are an integral piece formed through an integral molding process.

9. The seatbelt retractor according to any one of claims 1 to 8, wherein a second limit projection is provided on the base adjacent to the rotary member, the second limit projection being for limiting a rotation angle of the resilient plate.

10. An automobile, comprising a vehicle body, and a seatbelt retractor according to any one of claims 1 to 9 provided in the vehicle body.

Images