WO2022258000A1 - Compensation assembly for seat belt retractor - Google Patents

Abstract

Provided is a compensation assembly (4) for a seat belt retractor. A planetary gear train device (41) is respectively connected to a first connection device (42), a second connection device (43), and the retractor (44); the adjustment of each of the first connection device (42) and the second connection device (43) is related to the angle of the retractor (44); the planetary gear train device (41) is connected to the retractor (44) to directly compensate for the angle of the retractor (44); a sun gear (411) is connected to the first connection device (42); planet gears (412) meshed around the sun gear (411) are rotatably mounted on a planet carrier (413); the planet carrier (413) is connected to the retractor (44); and a ring gear (414) meshes with the planet gears (412) on the outside of the planet gears (412), and is connected to the second connection device (43). By means of the planetary gear train device (41), the compensation assembly (4) feeds back the adjustment of the first connection device (42) and of the second connection device (43) in real time to the retractor (44) to perform angle compensation and adjust the retractor (44), so that a seat belt can be normally used in a full adjustment process of a seat.

Description

Compensation components for seat belt retractors technical field

The present disclosure relates to car seats, and more particularly to a compensating assembly for a seat belt retractor, and a car seat including the compensating assembly.

Background technique

In the technical field of vehicle safety, the vehicle safety belt is an important part of the vehicle passive safety system, and is used to protect the safety of the occupants when the vehicle has an emergency (such as emergency braking, collision or overturning). The vehicle seat belt restrains the occupant through a belt-like webbing. The webbing can be retracted by the mandrel of the seat belt retractor and can be fixed to the vehicle by the deadbolt.

With the development of vehicle technology, users have higher and higher requirements for the comfort of vehicle seats. In the development of vehicle seats, the inclination angle of the seat back has evolved from fixed to adjustable, and the adjustable angle is getting larger and larger. On some commercial vehicles, the adjustment angle close to flat lying of the seat back has even been realized. Some known safety belt retractors are equipped with a vehicle sensing device, which can be used as a mechanical sensor in the safety belt retractor to sense the state of the vehicle, such as the acceleration and inclination angle of the vehicle. When the vehicle is in an emergency state, the vehicle sensing device can sense the emergency state, and can promote the locking of the mandrel of the seat belt retractor, preventing the webbing from continuing to be pulled out from the mandrel, so that the occupant can be well restrained by the webbing, thereby obtaining Good security protection.

A recliner assembly for a seat belt retractor has been developed. In the predetermined initial position of the backrest, the vehicle sensing device is in a substantially vertical orientation, and the safety belt can be pulled out normally at this time. When the backrest is adjusted backward from the initial position to a certain angle, on the one hand, this will cause the vehicle sensor device to deviate from the vertical orientation at this angle, and on the other hand, it will simultaneously cause the recliner assembly to pull the core wire assembly and finally cause the vehicle sensor The device is rotated in the opposite direction at another angle that at least partially compensates for the aforementioned angle such that the vehicle-sensing device can remain substantially in a vertical orientation. However, this known adjustment method is not suitable for more diverse seats, such as seats with an integral inclination adjustment function or height adjustment of the seat cushion. When the seat cushion is adjusted separately, the seat cushion and the backrest will move at the same time, the angle of the backrest relative to the vertical direction will change, and the car sensor device in the retractor will deviate from the vertical orientation; while the relative position of the seat cushion and the backrest will not change, the adjustment The corner plate assembly will not function, causing the car sensor to deviate from the vertical orientation and the seat belt will not pull out properly.

Contents of the invention

In order to solve the problem that the angle adjustment disc assembly in the prior art does not work if the relative position of the seat cushion and the backrest does not change, the present disclosure provides a compensation assembly for a seat belt retractor and a car seat.

According to the compensation assembly for a seat belt retractor of the present disclosure, it includes a planetary gear train device, a first connecting device, a second connecting device and a retractor, wherein the planetary gear train device is respectively connected to the first connecting device, the second connecting device Two connection devices and the retractor, the adjustment of the first connection device and the second connection device are related to the angle of the retractor, the planetary gear train device is connected with the retractor to directly compensate the retractor angle, the planetary gear train device It includes a sun gear, a planetary gear, a planet carrier and a ring gear, wherein the sun gear is connected with the first connecting device, and the planet gear meshing around the sun gear is rotatably installed on the planet carrier, and the planet carrier is connected with the retractor, The ring gear meshes with the planet wheels on the outside of the planet wheels and is connected to the second connecting device.

In some embodiments, when the sun gear is fixed and the ring gear rotates, the planetary gear rotates and drives the planet carrier to revolve around the sun gear; when the ring gear is fixed and the sun gear rotates, the planet gear rotates and drives the planetary gear The carrier revolves around the sun gear; when the sun gear and the ring gear rotate at the same time, the planetary gear system is a differential gear system, and the planetary gears rotate on their own, and at the same time drive the planet carrier to revolve around the sun gear.

In some embodiments, the compensation assembly further includes a retractor cable, and the retractor is connected to the planet carrier through the retractor cable.

In some embodiments, the retractor has a rotatable vehicle sensor connected to the planet carrier.

According to the car seat of the present disclosure, it includes the compensation assembly mentioned above.

In some embodiments, the car seat includes a seat cushion and a backrest, wherein the seat cushion is rotatably mounted on the slide rail, and the backrest is rotatably mounted on the seat cushion around a pivot.

In some embodiments, the first connecting device is a seat cushion angle input device and connects the planetary gear train device and the slide rail, and the second connecting device is a backrest angle input device and connects the planetary gear train device and the backrest.

In some embodiments, the retractor is secured to the backrest.

In some embodiments, the sun gear is connected with the seat cushion, and the ring gear is connected with the backrest; or the ring gear is connected with the seat cushion, and the sun gear is connected with the backrest.

In some embodiments, the planetary gear device is coaxially mounted on the pivot of the backrest and mounted on the lower connecting plate of the recliner through a base.

Additional features and advantages of the subject technology of the present disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the subject technology of the present disclosure. The advantages of the subject technology of the present disclosure will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the subject technology of the present disclosure as claimed.

Description of drawings

Aspects of the present disclosure will be better understood after reading the following detailed description in conjunction with the accompanying drawings, in which:

1 is a schematic diagram of the overall structure of a car seat according to Embodiment 1 of the present disclosure;

Fig. 2 is a simplified diagram of the car seat shown in Fig. 1;

Fig. 3 is a partially enlarged view of a compensation assembly and a safety belt retractor for the car seat of Fig. 1;

Fig. 4 is a partial exploded view of the compensating assembly shown in Fig. 3;

Fig. 5 is a schematic diagram of the planetary gear train device of the compensation assembly shown in Fig. 3;

Fig. 6 is the cushion adjustment of the compensation assembly shown in Fig. 3 from the initial position;

Fig. 7 is the backrest adjustment of the compensation assembly shown in Fig. 3 from the initial position;

8 is a schematic diagram of the overall structure of a car seat according to Embodiment 2 of the present disclosure;

FIG. 9 is a partial exploded view of a compensation assembly for the car seat of FIG. 8 .

Detailed ways

The present disclosure will be described below with reference to the accompanying drawings, which illustrate several embodiments of the disclosure. However, it should be understood that the present disclosure can be presented in many different ways, and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and contribute to this Those skilled in the art fully explain the protection scope of the present disclosure. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide even more additional embodiments.

It should be understood that like reference numerals refer to like elements throughout the drawings. In the drawings, the dimensions of some features may be distorted for clarity.

It should be understood that the terminology used in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. Unless otherwise defined, all terms (including technical terms and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art. Well-known functions or constructions may not be described in detail for brevity and/or clarity.

The singular forms "a", "the" and "the" used in the specification include plural forms unless clearly stated otherwise. The terms "comprising", "comprising" and "comprising" are used in the specification to indicate the presence of claimed features but not to exclude the presence of one or more other features. The term "and/or" used in the specification includes any and all combinations of one or more of the related listed items. The terms "between X and Y" and "between about X and Y" used in the specification should be construed to include X and Y. As used in this specification, the phrase "between about X and Y" means "between about X and about Y", and the phrase "from about X to Y" is used in this specification to mean "from about X to about Y".

In the specification, when an element is referred to as being “on,” “attached to,” “connected to,” “coupled to,” or “in contact with” another element, etc., another element, The element may be directly on, attached to, connected to, coupled to, or contact another element, or intervening elements may be present. In contrast, saying that an element is "directly on" another element, "directly attached to" another element, "directly connected to" another element, "directly coupled" to another element or, or " When "directly contacting" another element, there will be no intervening elements present. In the specification, a feature arranged "adjacent" to another feature may mean that a feature has a portion overlapping an adjacent feature or a portion above or below the adjacent feature.

In the specification, terms of spatial relation such as "upper", "lower", "left", "right", "front", "rear", "high", "low", etc. may describe the relationship between one feature and another. Relationships in the attached drawings. It will be understood that the spatially relative terms encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, features described as "below" other features would then be oriented "above" the other features. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the relative spatial relationships interpreted accordingly.

Example 1

As shown in FIGS. 1 and 2 , a car seat according to Embodiment 1 of the present disclosure includes a seat cushion 1 , a slide rail 2 and a backrest 3 . The seat cushion 1 is rotatably mounted on the slide rail 2 , so as to realize, for example, the inclination adjustment or height adjustment of the seat cushion 1 as a whole around its pivot 11 . The backrest 3 is rotatably mounted on the seat cushion 1 around its pivot 31 so as to be foldable relative to the seat cushion 1 . The retractor 44 of the safety belt retractor is fixedly installed on the backrest 3 , and a rotatable vehicle sensing device 441 is integrated in the retractor 44 .

As shown in Figures 1 and 2, the car seat also includes a compensating assembly 4 for the seat belt retractor. The compensation assembly 4 includes a planetary gear train device 41 , a first connecting device 42 and a second connecting device 43 . The planetary gear train device 41 is coaxially mounted on the pivot 31 of the backrest 3 and is mounted on the lower connecting plate of the recliner fixed to the seat cushion 1 through its base 41a. The first connecting device 42 connects the planetary gear train device 41 and the slide rail 2, and serves as an input device for the angle of the seat cushion. The second connection device 43 connects the planetary gear train device 41 and the backrest 3 and serves as an input device for the backrest angle. The retractor 44 is connected to the planetary gear train device 41 via its retractor cable 45 . In some embodiments, as shown in FIG. 3 , the vehicle sensing device 441 in the retractor 44 is coupled to the planetary gear train device 41 through the retractor cable 45 .

As shown in FIG. 4 , the planetary gear train device 41 includes a sun gear 411 , a planetary gear 412 , a planet carrier 413 and a ring gear 414 . The sun gear 411 is rotatably fixed on the base 41a through a stepped bolt 411a, and is connected with the slide rail 2 through a first connecting device 42 (see FIG. 1 ). In some embodiments, the first connecting device 42 protrudes from the sun gear 411 and is pivotally connected with the slide rail 2 . Three planetary gears 412 are arranged around the sun gear 411 and mesh with the sun gear 411 respectively. The three planet wheels 412 are rotatably mounted on the planet carrier 413 through stepped rivets 412a respectively. The planet carrier 413 is connected to the retractor 44 (see FIG. 2 ) through the retractor cable 45 . In some embodiments, the outer race of the planet carrier 413 is left with a feature that connects to the retractor cable 45 . The ring gear 414 surrounds the planet gear 412 and meshes with the planet gear 412 , and is connected with the backrest 3 through the second connecting device 43 . In some embodiments, the second connecting device 43 protrudes from the ring gear 414 and is connected with the backrest 3 . However, it should be understood that, in other embodiments, the ring gear 414 can be configured to be coupled with the slide rail 2, the sun gear 411 can be configured to be connected to the backrest 3, and the planet carrier 413 is connected to the retractor cable 45, This arrangement can still achieve the corresponding functional requirements.

The working principle of the planetary gear train device 41 will be described below with reference to FIG. 5 . When the sun gear 411 is fixed and the ring gear 414 rotates, the planetary gear 412 will rotate and at the same time drive the planet carrier 413 to revolve around the sun gear 411 . When the ring gear 414 is fixed and the sun gear 411 rotates, the planetary gear 412 will rotate and drive the planet carrier 413 to revolve around the sun gear 411 at the same time. When the sun gear 411 and the ring gear 414 rotate at the same time, the gear train becomes a differential gear train, and the planetary gear 412 still rotates, and at the same time drives the planetary carrier 413 to revolve around the sun gear 411 .

Figure 6 shows the adjustment of the cushion from the initial position. It can be seen from FIGS. 1-3 that when the backrest 3 is in the initial position, the vehicle sensing device 441 is in a substantially vertical orientation, and the seat belt can be pulled out normally at this time. When the seat cushion 1 is adjusted backward by a certain angle A around its pivot 11 from the initial position, the seat cushion 1 and the backrest 3 rotate backward by a certain angle A at the same time. On the one hand, this backward rotation causes the vehicle sensor device 441 to deviate from the vertical orientation by the angle A accordingly. On the other hand, the first connecting device 42 moves with the movement of the seat cushion 1 , thereby driving the sun gear 411 to rotate, and the ring gear 414 is fixed. As mentioned above, when the ring gear 414 is fixed and the sun gear 411 rotates, the planetary gear 412 will rotate, thereby driving the planetary carrier 413 to revolve around the sun gear 411, and pulling the retractor cable 45, finally causing the The sensing device 441 rotates by another angle B in the opposite direction. Angle B may at least partially compensate, and in some embodiments substantially completely, compensate for aforementioned angle A, such that the vehicle-sensing device 441 may remain substantially in a vertical orientation.

Figure 7 shows the adjustment of the backrest from the initial position. It can be seen from FIGS. 1-3 that when the backrest 3 is in the initial position, the vehicle sensing device 441 is in a substantially vertical orientation, and the seat belt can be pulled out normally at this time. When the backrest 3 is adjusted backward by a certain angle C around its pivot 31 from the initial position, on the one hand, this causes the vehicle sensor device 441 to deviate from the vertical orientation correspondingly at this angle C; on the other hand, this causes the second connecting device 43 to The ring gear 414 is driven to rotate, and the sun gear 411 is fixed. As mentioned above, when the sun gear 411 is fixed and the ring gear 414 rotates, the planetary gear 412 will rotate, thereby driving the planetary carrier 413 to revolve around the sun gear 411, and pulling the retractor cable 45, finally causing the vehicle to rotate. The sensing device 441 rotates by another angle D in the opposite direction. Angle D may at least partially compensate, and in some embodiments substantially completely, compensate for aforementioned angle C, such that the vehicle-sensing device 441 may remain substantially in a vertical orientation.

It should be understood that when the seat cushion 1 and the backrest 3 are adjusted simultaneously, the planetary gear train becomes a differential gear train at this time. As mentioned above, the planetary gear 412 still rotates, thereby driving the planetary carrier 413 to revolve around the sun gear 411 and pulling the retractor cable 45 to compensate for the angle of the vehicle sensing device 441 .

Example 2

A car seat according to Embodiment 2 of the present disclosure will be described below with reference to FIGS. 8 and 9 . Only the differences from Embodiment 1 will be described below, and the same parts will not be repeated here. A return spring (not shown) is installed inside the sun gear, one end of the spring is connected to the sun gear, and the other end is connected to the base of the planetary gear train device. The first connection device 42' is a sun gear cable, and one end of the sun wheel cable 42' is fixed on the slide rail, and the other end is fixed on the outstretched column 411b of the sun wheel.

When the cushion was adjusted backwards, the sun gear cable 42' was tightened, thereby making the sun gear rotate. The rotation of the sun gear drives the retractor cable, eventually causing the vehicle sensing device 441 to rotate in the opposite direction, and meanwhile the rotation of the sun gear also causes the spring to twist and deform. When the seat cushion was adjusted back, the sun gear drag cable 42 ' was loose, and the torsionally deformed spring was used to drive the sun gear to rotate back.

When the seat cushion does not move and only the backrest is adjusted, the sun gear is locked by the spring, thereby also realizing the same motion as in embodiment 1.

The compensation assembly for the seat belt retractor according to the embodiment of the present disclosure uses a mechanical method to feed back the adjustment of the first connection device (seat cushion) and the adjustment of the second connection device (backrest) to the retractor in real time through the planetary gear train device. Adjust the retractor according to the angle compensation, so that the seat belt can be used normally in the full adjustment stroke of the seat.

According to the compensation assembly for the seat belt retractor of the present disclosure, the adjustment of the first connection device (seat cushion) and the adjustment of the second connection device (backrest) can be input independently of each other through the planetary gear train device, and are synchronously sent to the retractor. Receiver output results, the entire structure is compact, stepless transmission, to ensure safety and accuracy.

What is described above is only a preferred embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure, and various changes can also be made to the above-mentioned embodiments of the present disclosure. That is to say, all simple and equivalent changes and modifications made according to the claims of the disclosed application and the contents of the specification all fall within the protection scope of the claims of the disclosed patent. What is not described in detail in this disclosure is conventional technical content.

Claims (19)

A compensation assembly for a seat belt retractor, characterized in that the compensation assembly includes a planetary gear train device, a first connecting device, a second connecting device and a retractor, wherein the planetary gear train device is respectively connected to the first The connecting device, the second connecting device and the retractor, the adjustment of the first connecting device and the second connecting device are all related to the angle of the retractor, the planetary gear train device is connected with the retractor to directly compensate the angle of the retractor, The planetary gear system device includes a sun gear, a planetary gear, a planetary carrier and a ring gear, wherein the sun gear is connected with the first connecting device, and the planetary gear meshing around the sun gear is rotatably installed on the planetary carrier, and the planetary carrier is connected with the winding The ring gear is connected with the planetary gear on the outside of the planetary gear and connected with the second connecting device. The compensation assembly according to claim 1, characterized in that, when the sun gear is fixed and the ring gear rotates, the planetary gear rotates and drives the planet carrier to revolve around the sun gear; when the ring gear is fixed and the sun gear rotates, The planetary gear rotates, and drives the planetary carrier to revolve around the sun gear; when the sun gear and the ring gear rotate at the same time, the planetary gear system is a differential gear system, and the planetary gear rotates, and drives the planetary carrier to revolve around the sun gear at the same time. Revolution. The compensation assembly according to claim 1, further comprising a retractor cable, and the retractor is connected to the planet carrier through the retractor cable. The compensating assembly according to claim 1, wherein the retractor has a rotatable vehicle sensing device connected with the planet carrier. A car seat comprising the compensating assembly according to any one of claims 1-4. The car seat according to claim 5, characterized in that the car seat comprises a seat cushion and a backrest, wherein the seat cushion is rotatably mounted on the slide rail, and the backrest is rotatably mounted on the seat cushion around a pivot. The car seat according to claim 6, wherein the first connecting device is a seat cushion angle input device and connects the planetary gear train device and the slide rail, and the second connecting device is a backrest angle input device and connects the planetary gear train device and the slide rail. backrest. The car seat according to claim 6, wherein the retractor is fixed on the backrest. The car seat according to claim 6, characterized in that, the sun gear is connected with the seat cushion, and the ring gear is connected with the backrest; or the ring gear is connected with the seat cushion, and the sun gear is connected with the backrest. The car seat according to claim 6, characterized in that the planetary gear train device is coaxially installed on the pivot of the backrest and installed on the lower connecting plate of the recliner through the base. A compensation assembly for a safety belt retractor of a car seat, the car seat includes a seat cushion rotatably installed on a slide rail and a backrest rotatably installed on the seat cushion, the retractor is fixed on On the backrest and including the vehicle sensor device, it is characterized in that the compensation assembly includes: a planetary gear train device mounted on the seat cushion and comprising a sun gear, a planet gear, a planet carrier and a ring gear, wherein the planet gear meshes around the sun gear and is rotatably mounted on the planet carrier, The planet carrier is connected with the retractor through the retractor cable, and the ring gear meshes with the planet gear outside the planet gear; a first connecting device, the first connecting device is configured as an input device for inputting the angle of the seat cushion to the planetary gear train device, thereby driving one of the sun gear and the ring gear to rotate; and a second connecting device, the second connecting device is configured as an input device for inputting a backrest angle to the planetary gear train device, thereby driving the other of the sun gear and the ring gear to rotate; Wherein, the planetary gear train device drives the planet carrier to rotate through the rotation of the sun gear and/or the ring gear, thereby compensating the angle of the vehicle sensor device. The compensation assembly according to claim 11, wherein when the sun gear is fixed and the ring gear rotates, the planetary gear rotates on its own, and at the same time drives the planet carrier to revolve around the sun gear; When the ring gear is fixed and the sun gear rotates, the planet gear rotates on its own, and at the same time drives the planet carrier to revolve around the sun gear; and When the sun gear and the ring gear rotate at the same time, the planetary gear system is a differential gear system, and the planetary gears rotate on their own, and at the same time drive the planet carrier to revolve around the sun gear. A compensating assembly according to claim 11 or 12, wherein a first connecting means connects the slide rail to said one of the sun gear and ring gear and a second connecting means connects the backrest to said one of the sun gear and the ring gear. said other in the circle. The compensating assembly according to claim 11 or 12, characterized in that the first connection means protrudes from the sun gear and is pivotally connected with the slide rail. Compensation assembly according to claim 11 or 12, characterized in that the first connection means is configured as a sun gear cable and connects the slide rail to the sun gear, wherein the sun gear is equipped with a return spring. The compensating assembly according to claim 11 or 12, characterized in that the second connection means protrudes from the ring gear and is connected with the backrest. The compensating assembly according to claim 11 or 12, characterized in that the outer ring of the planet carrier has a feature connected to the retractor cable. The car seat according to claim 11 or 12, characterized in that the planetary gear device is coaxially mounted on the pivot of the backrest, and is mounted on the lower connecting plate of the recliner fixed to the seat cushion through the base. A car seat comprising a compensating assembly according to any one of claims 11-18.

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