Vehicle seat

Abstract

The present invention relates to a vehicle seat. The vehicle seat comprises: a seat cushion part, a backrest part capable of rotating relative to the seat cushion part, and a seat belt arranged on the vehicle seat, wherein the seat belt comprises a webbing and a lock tongue arranged on the webbing, a first end of the webbing being fixed to the seat cushion part via a first retractor, a second end of the webbing being fixed to the backrest part via a second retractor, and the lock tongue being limited at a predetermined position on the webbing; and a limiting module, comprising a first limiting member and a second limiting member which interact with one another, wherein the first limiting member is fixed to a side face of the seat cushion part and is provided with a first abutting part, and the second limiting member is fixed to a side face of the backrest part and is provided with a second abutting part. When a predetermined condition is satisfied, the backrest part rotates relative to the seat cushion part in a first rotation direction from a first angle to a second angle smaller than the first angle, thus driving the second limiting member to rotate relative to the first limiting member in the first rotation direction, such that the first abutting part and the second abutting part gradually move closer to one another and finally abut against one another, so as to limit the backrest part at the second angle.

Description

Vehicle seats Technical Field

[0001] The present invention relates to automobile components, in particular to a vehicle seat. Background Art

[0002] Vehicle seats are commonly equipped with seatbelts as a safety feature. When the seatbelt's locking tongue is engaged with the buckle, i.e., when the seatbelt is fastened, the belt cannot move from the occupant's shoulders toward their legs, thereby restraining the occupant in the vehicle seat. However, if the difference between the belt tension at the shoulders and the belt tension at the legs is less than a predetermined value, the belt can move from the occupant's shoulders toward their legs, causing excessive slack around the legs and creating a significant gap between the belt and the legs. This occurs when the seatback shifts to an upright configuration in response to a vehicle collision, allowing the occupant's legs to move freely relative to the vehicle seat, allowing them to slide forward and off the seat.

[0003] Therefore, it is desired to provide a vehicle seat with higher safety.

[0004] Summary of the Invention

[0005] The object of the present invention is to provide a safer vehicle seat, which is particularly suitable for scenarios where the seat backrest is converted towards an upright configuration in the event of a collision.

[0006] The present invention provides a vehicle seat, comprising:

[0007] a seat cushion portion, a backrest portion rotatable relative to the seat cushion portion, and a seat belt provided on the vehicle seat,

[0008] in,

[0009] The safety belt includes a webbing and a locking tongue provided on the webbing, wherein a first end of the webbing is fixed to the seat cushion portion via a first retractor, a second end of the webbing is fixed to the backrest portion via a second retractor, and the locking tongue is limited to a predetermined position on the webbing;

[0010] Limit module, including:

[0011] The first and second limiting members interact with each other,

[0012] The first limiting member is fixed to the side of the seat portion and is provided with a first abutting portion;

[0013] The second limiting member is fixed to the side of the backrest and is provided with a second abutting portion;

[0014] When the predetermined condition is met, the backrest portion rotates in a first rotational direction relative to the seat cushion portion from a first angle toward a second angle smaller than the first angle, thereby driving the first limiting member to rotate in the first rotational direction relative to the second limiting member, so that the first abutting portion and the second abutting portion gradually approach and eventually abut against each other, thereby limiting the angle of the backrest portion relative to the seat cushion portion to the second angle.

[0015] According to an embodiment of the present invention, the first limiting member is provided with a first opposite abutting portion spaced apart from the first abutting portion, and the second limiting member is provided with a second opposite abutting portion spaced apart from the second abutting portion, and when the predetermined condition is not met, the first opposite abutting portion and the second opposite abutting portion abut against each other;

[0016] The limiting module is further provided with a force applying member, which is configured to apply a force to the first limiting member or the second limiting member to cause the two to abut against each other at the first abutting portion and the second abutting portion when the predetermined condition is met.

[0017] According to an embodiment of the present invention, one of the first limiting member and the second limiting member is configured to have a through-hole portion, at least one section of the through-hole portion in the circumferential direction is constructed to be recessed relative to an adjacent section to form a groove, the other of the first limiting member and the second limiting member is provided with a main body portion rotatably accommodated in the through-hole portion, at least one part of the main body portion is constructed to protrude relative to an adjacent part to form a protrusion positioned in the groove, a pair of side surfaces of the protrusion and the groove that are opposite in the circumferential direction are respectively constructed as the first abutment portion and the second abutment portion, and another pair of side surfaces of the protrusion and the groove that are opposite in the circumferential direction are respectively constructed as the first opposite abutment portion and the second opposite abutment portion.

[0018] According to an embodiment of the present invention, the surface of the groove extending in the circumferential direction is configured as a gradual surface, and when the first abutting portion gradually approaches the second abutting portion, the gap between the protrusion and the gradual surface becomes smaller and smaller until they contact each other.

[0019] According to an embodiment of the present invention, both the first limiting member and the second limiting member are configured as disc-shaped members.

[0020] According to an embodiment of the present invention, the predetermined condition is defined as a vehicle collision / an acceleration of the vehicle being greater than a predetermined value.

[0021] According to an embodiment of the present invention, the first limiting member and the second limiting member are fixed together via a fixing member, and the fixing member is removed when the predetermined condition is met.

[0022] According to an embodiment of the present invention, the limiting module further includes a removing device, and when the predetermined condition is met, the removing device applies force to the fixing member to remove it from the first limiting member and the second limiting member.

[0023] According to an embodiment of the present invention, the force applying member is configured as an elastic member having one end fixed to the first limiting member or the second limiting member and the other end fixed to the seat cushion frame.

[0024] According to an embodiment of the present invention, the limiting module is provided with a pair of protrusions and a pair of grooves, and the pair of protrusions are arranged at a predetermined angle apart from each other, and the pair of grooves are arranged at a predetermined angle apart from each other.

[0025] According to an embodiment of the present invention, the range of the predetermined angle is set within the range of 100 degrees to 180 degrees.

[0026] According to an embodiment of the present invention, the predetermined angle is set to 180 degrees. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The features, advantages and technical effects of the exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the accompanying drawings, the same symbols indicate the same elements, wherein:

[0028] FIG1 schematically shows a vehicle seat according to the invention.

[0029] 2 to 4 schematically illustrate a positioning module and components thereof in a vehicle seat according to the present invention. DETAILED DESCRIPTION

[0030] The following describes specific embodiments of a vehicle seat according to the present invention in conjunction with the accompanying drawings. The following detailed description and accompanying drawings are intended to illustrate the principles of the present invention. The present invention is not limited to the preferred embodiments described herein. The various embodiments described herein may be used individually or in any combination. The scope of protection of the present invention is defined by the claims.

[0031] In addition, spatially relative terms (such as "upper," "lower," "left," and "right") are used to describe the relative positional relationship of an element shown in the drawings to another element. Therefore, the spatially relative terms can be applied to orientations different from those shown in the drawings when used. Obviously, although all of these spatially relative terms refer to the orientations shown in the drawings for ease of description, those skilled in the art will understand that orientations different from those shown in the drawings can be used.

[0032] Fig. 1 schematically shows a vehicle seat according to the present invention. The vehicle seat according to the present invention will be described below with reference to Fig. 1 .

[0033] As shown in FIG1 , the vehicle seat 10 of the present invention includes a seat cushion 11 and a backrest 12. The backrest 12 is rotatable relative to the seat cushion 11, allowing the passenger to adjust the angle of the backrest 12 relative to the seat cushion 11 for improved comfort. Furthermore, the vehicle seat 10 of the present invention is equipped with a seatbelt, which is provided on the vehicle seat 10 to secure the passenger. The seatbelt includes a webbing 13 and a locking tongue 14 provided on the webbing 13. As shown in FIG1 , the locking tongue 14 is inserted into the buckle to secure the passenger. In the present invention, the webbing 13 is equipped with two retractors. Specifically, the first end of the webbing 13 (i.e., the lower end in FIG1 ) is secured to the seat cushion 11 via a first retractor 15, and the second end of the webbing 13 (i.e., the upper end in FIG1 ) is secured to the backrest 12 via a second retractor 16. The locking tongue 14 is positioned at a predetermined position on the webbing 13. For example, the locking tongue 14 is fixed in the loop portion of the webbing 13, and the loop portion is formed in the following manner: a section of the webbing 13 is folded in half and fixed via stitches along the width direction of the webbing to form a ring-shaped section. Since the locking tongue 14 is restricted to the changing section, it can be understood as being restricted to a predetermined position of the webbing; for another example, the locking tongue 14 can be restricted to a predetermined position of the webbing 13 by means of fixings, bonding, etc.

[0034] It is understood that if the difference between the tension in the seatbelt webbing at the shoulders and the tension in the legs is less than a predetermined value, the webbing can move from the occupant's shoulders to their legs, causing the seatbelt to become too loose at the legs and creating a large gap between the legs. This situation involves the seatback rotating toward the upright configuration in response to a vehicle collision. At this point, the occupant's legs can move freely relative to the vehicle seat, allowing them to slide forward and off the vehicle seat. Considering that in the use of a zero-gravity safety seat, the rotation of the backrest may be configured to cause the seat cushion to rotate, making it more likely that the occupant will slide off the vehicle seat.

[0035] To address this problem, the lock tongue in the present invention is confined to a predetermined position of the webbing, ensuring that the section of the webbing at the passenger's shoulder cannot pass through the through hole of the lock tongue and move to the leg. Similarly, the section of the webbing at the passenger's leg cannot pass through the through hole of the lock tongue and move to the shoulder. On this basis, the two retractors located at both ends of the webbing can work independently to tighten the sections of the webbing at the passenger's shoulder and leg, respectively, thereby firmly fixing the passenger to the vehicle seat.

[0036] The vehicle seat of the present invention further includes a limiting module 17, which is used to limit the degree of restoration of the backrest portion 12 relative to the seat cushion portion 11 when a predetermined condition is met. The limiting module of the present invention will be described in detail below.

[0037] 2 to 4 schematically illustrate a position limiting module and components thereof in a vehicle seat according to the present invention. The position limiting module in a vehicle seat according to the present invention will be described in detail below with reference to FIG.

[0038] Please refer to Figures 2 to 4. The limiting module 17 of the present invention includes a first limiting member 171 and a second limiting member 172. The first limiting member 171 and the second limiting member 172 shown in Figures 2 and 3 are disc-mounted components, but this is only an example. The shapes of the first limiting member and the second limiting member of the limiting module of the present invention are not limited and can be determined according to actual conditions, such as a square shape or other irregular shapes.

[0039] As shown in FIG1 , the first stopper 171 is fixed to the side of the seat cushion portion 11, and the second stopper 172 is fixed to the side of the backrest portion 12. In this embodiment, the first stopper 171 is configured to have a through-hole portion 1711. The through-hole portion 1711 is configured to penetrate the entire thickness of the first stopper 171 and can be concentrically arranged with the disc-shaped first stopper 171. At least one circumferential section of the through-hole portion 1711 is configured to be recessed relative to an adjacent section to form a groove 1712. Here, "recessed" refers to a radially outward recess, that is, the through-hole portion 1711 has a larger diameter at the groove 1712. As shown in FIG4 , the groove 1712 has a first side surface 1712A and a second side surface 1712B that are opposite to each other in the circumferential direction. Second stopper 172 includes a base 1723 and a main body 1721 protruding from one side of base 1723. Main body 1721 protrudes from one side of base 1723 in the thickness direction. That is, second stopper 172 has a greater thickness at main body 1721. Main body 1721 is rotatably accommodated in through-hole 1711 of first stopper 171. Furthermore, at least one portion of main body 1721 is configured as a protrusion 1722 that protrudes relative to an adjacent portion. Protrusion 1722 protrudes radially outward relative to its adjacent portion and is positioned within recess 1712 of first stopper 171. Similarly, as shown in FIG. 4 , protrusion 1722 has a first side surface 1722A and a second side surface 1722B that are circumferentially opposed to each other. Therefore, when the first limiting member 171 and the second limiting member 172 are assembled, the first side surface 1722A and the second side surface 1722B of the protrusion 1722 and the first side surface 1712A and the second side surface 1712B of the groove 1712 are circumferentially opposite to each other.

[0040] The first side surface 1722A of the protrusion 1722 and the first side surface 1712A of the groove 1712 function as a first abutment portion and a second abutment portion, respectively. As shown in FIG4 , when a predetermined condition is satisfied, the backrest portion 12 rotates relative to the seat cushion portion 11 in the first rotational direction R from a first angle toward a second angle smaller than the first angle, thereby driving the first limiting member 171 to rotate relative to the second limiting member 172 in the first rotational direction R, so that the first abutment portion and the second abutment portion gradually approach and eventually abut against each other, thereby limiting the angle of the backrest portion 12 relative to the seat cushion portion 11 to the second angle.

[0041] The second side 1722B of the protrusion 1722 and the second side 1712B of the groove 1712 function as a first opposing abutment portion and a second opposing abutment portion, respectively. When a predetermined condition is not met, the second side 1722B of the protrusion 1722 and the second side 1712B of the groove 1712 abut against each other to maintain the position of the first stopper 171 relative to the second stopper 172 in an alternate position. This alternate position places the first abutment portion and the second abutment portion at a predetermined distance. It will be understood that this predetermined distance is related to the degree of recovery of the backrest portion 12 relative to the seat cushion portion 11. Specifically, when the predetermined distance is greater, the backrest portion 12 has recovered more relative to the seat cushion portion 11, i.e., the backrest portion 12 is closer to an upright position. When the predetermined distance is smaller, the backrest portion 12 has recovered less relative to the seat cushion portion 11, i.e., the backrest portion 12 is further from the upright position.

[0042] As one embodiment of the present invention, the limiting module 17 can be provided with a pair of protrusions 1722 and a pair of grooves 1712 to ensure that the first limiting member and the second limiting member are evenly stressed when they abut against each other. For example, the pair of protrusions 1722 are arranged 180 degrees apart from each other, and the pair of grooves 1712 are arranged 180 degrees apart from each other. Of course, this is merely an example, and the pair of protrusions and the pair of grooves can be arranged at other angles, such as any angle within the range of 100 degrees to 180 degrees. The limiting module 17 can be provided with other numbers (e.g., more than two) of protrusions and grooves on the first limiting member and the second limiting member, respectively.

[0043] As one embodiment of the present invention, the circumferentially extending surface of groove 1712 is configured as a gradual surface 1712C. As the first abutting portion gradually approaches the second abutting portion, as shown in FIG4 , the gap between protrusion 1722 and gradual surface 1712C gradually decreases until they contact each other. It will be appreciated that the provision of the gradual surface can reduce the rotational speed of the first stopper through the friction between the gradual surface and the protrusion, thereby reducing the impact generated when the first and second abutting portions abut against each other.

[0044] The first limiting member 171 and the second limiting member 172 are connected in the following manner.

[0045] As shown in Figure 2, the first limiter 171 is provided with a fixing hole 1713, and four fixing holes 1713 are distributed along the periphery of the first limiter 171. Correspondingly, the second limiter 172 is also provided with four fixing holes. When the first opposite abutting portion and the second opposite abutting portion abut against each other, the fixing holes of the first limiter 171 and the second limiter 172 are aligned one by one, and are fixed together via a fixing member (e.g., a pin) passing through these fixing holes. In addition, it is arranged as follows: the fixing member is removed when a predetermined condition is met. To this end, the limiter module 17 also includes a removal device, which is, for example, a device that can generate thrust (which can be generated by igniting gunpowder) to push the fixing member away from the fixing hole. When the predetermined condition is met, the removal device applies force to the fixing member to remove it from the first limiter 171 and the second limiter 172, thereby enabling the first limiter 171 and the second limiter 172 to generate relative rotation.

[0046] Furthermore, the second stopper can be directly fixed to the frame of the seat backrest, while the first stopper can be connected to the frame of the seat cushion via a recliner. The recliner is used to adjust the angle of the backrest relative to the seat cushion to provide comfort. That is, when a predetermined condition is not met, the first stopper and the second stopper are fixed together and do not rotate relative to each other. Meanwhile, the angle of the backrest relative to the seat cushion is adjusted by the recliner. As is well known, during seat use, after the angle of the seat backrest is adjusted, the recliner is locked, preventing the seat backrest from rotating relative to the seat cushion even in the event of a collision. In the vehicle seat of the present invention, the stopper module comprising the first stopper and the second stopper allows the seat backrest to rotate at a controlled angle (rather than rotating forward without restriction) in the event of a collision while the seat belt is tightened. This prevents the occupant from sliding forward and leaving the seat, minimizing injury to the occupant.

[0047] As an embodiment of the present invention, the limiting module further includes a force-applying member, which is configured to apply a force to the first limiting member or the second limiting member so that the two abut against each other at the first abutting portion and the second abutting portion when a predetermined condition is met. For example, the force-applying member is configured as a spring, one end of which is fixed to the first limiting member and the other end is fixed to the frame of the backrest. The spring is used to store a certain elastic force, and cannot drive the backrest to rotate when the predetermined condition is not met. It can be understood that after the fixing member used to lock the first limiting member and the second limiting member together is pushed away from the fixing hole, considering that, for example, in the initial stage of a collision, the inertia force of the passenger and the tension of the seat belt are too small, the elastic force stored in the spring can apply an initial driving torque to the first limiting member, thereby overcoming the friction force on the first limiting member and ensuring that the backrest rotates to the above-mentioned second angle as soon as possible.

[0048] Of course, the vehicle seat of the present invention is not limited to the above-described example. For example, the specific structures of the first and second stoppers described above may be interchanged. That is, the second stopper may be provided with a through-hole portion, wherein at least one circumferential section of the through-hole portion is configured to be recessed relative to an adjacent section to form a groove, and the first stopper may be provided with a main body portion rotatably accommodated in the through-hole portion, wherein at least one portion of the main body portion is configured to protrude relative to an adjacent portion to form a protrusion positioned within the groove. Similarly, a pair of circumferentially opposing side surfaces of the protrusion and the groove are respectively configured as the above-mentioned first abutment portion and the above-mentioned second abutment portion, and another pair of circumferentially opposing side surfaces of the protrusion and the groove are respectively configured as the above-mentioned first opposing abutment portion and the above-mentioned second opposing abutment portion.

[0049] Furthermore, the first and second opposing abutting portions, respectively, provided on the first and second limiting members of the present invention are not limited to the structures described in the above examples. For example, the first abutting portion and the first opposing abutting portion of the first limiting member can be provided as two separate structures, such as two separate protrusions, and the second abutting portion and the second opposing abutting portion of the second limiting member can be provided as two separate structures. Furthermore, the force-applying member of the limiting module can also be provided as other devices capable of providing a driving force.

[0050] As one embodiment of the present invention, the predetermined condition is defined as a collision of the vehicle / an acceleration of the vehicle being greater than a predetermined value.

[0051] As mentioned above, although the exemplary embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above specific embodiments, and the scope of protection of the present invention should be defined by the claims and their equivalents.

Claims

1. A vehicle seat (10), comprising: A seat cushion portion (11), a backrest portion (12) rotatable relative to the seat cushion portion (11), and a safety belt arranged on the vehicle seat (10), It is characterized in that The safety belt comprises a webbing (13) and a locking tongue (14) arranged on the webbing (13); a first end of the webbing (13) is fixed to the seat cushion portion (11) via a first retractor (15); a second end of the webbing (13) is fixed to the backrest portion (12) via a second retractor (16); and the locking tongue (14) is limited to a predetermined position of the webbing (13); The limit module (17) comprises: A first stopper (171) and a second stopper (172) interacting with each other, The first limiting member (171) is fixed to the side of the seat cushion portion (11) and is provided with a first abutting portion; The second limiting member (172) is fixed to the side of the backrest portion (12) and is provided with a second abutting portion; When a predetermined condition is met, the backrest portion (12) rotates relative to the seat cushion portion (11) in a first rotation direction (R) from a first angle toward a second angle smaller than the first angle, thereby driving the first limiting member (171) to rotate relative to the second limiting member (172) in the first rotation direction (R), so that the first abutting portion and the second abutting portion gradually approach and finally abut against each other, thereby limiting the angle of the backrest portion (12) relative to the seat cushion portion (11) to the second angle.

2. The vehicle seat (10) according to claim 1, wherein: The first stopper (171) is provided with a first opposite abutting portion spaced apart from the first abutting portion, and the second stopper (172) is provided with a second opposite abutting portion spaced apart from the second abutting portion, and when the predetermined condition is not satisfied, the first opposite abutting portion and the second opposite abutting portion abut against each other; The limiting module (17) is also provided with a force applying member, which is configured to apply a force to the first limiting member (171) or the second limiting member (172) so that the two are pressed against each other at the first abutting portion and the second abutting portion when the predetermined condition is met.

3. The vehicle seat (10) according to claim 2, wherein: One of the first limiting member (171) and the second limiting member (172) is configured to have a through hole portion (1711), at least one section of the through hole portion (1711) in the circumferential direction is constructed to be recessed relative to an adjacent section to form a groove (1712), the other of the first limiting member (171) and the second limiting member (172) is provided with a main body portion (1721) rotatably accommodated in the through hole portion (1711), at least one portion of the main body portion (1721) is constructed to protrude relative to an adjacent portion to form a protrusion (1722) positioned in the groove (1712), a pair of circumferentially opposite side surfaces of the protrusion (1722) and the groove (1712) are respectively constructed as the first abutment portion and the second abutment portion, and another pair of circumferentially opposite side surfaces of the protrusion and the groove are respectively constructed as the first opposite abutment portion and the second opposite abutment portion.

4. The vehicle seat (10) according to claim 3, wherein: The surface of the groove (1712) extending in the circumferential direction is constructed as a gradual surface (1712C), and when the first abutment portion gradually approaches the second abutment portion, the gap between the protrusion (1722) and the gradual surface (1712C) becomes smaller and smaller until they contact each other.

5. The vehicle seat (10) according to claim 5, wherein: The first limiting member (171) and the second limiting member (172) are both configured as disc-shaped members.

6. The vehicle seat (10) according to claim 1, wherein: The predetermined condition is defined as a collision of the vehicle / an acceleration of the vehicle being greater than a predetermined value.

7. The vehicle seat (10) according to claim 1, wherein: The first limiting member (171) and the second limiting member (172) are fixed together via a fixing member, and the fixing member is removed when the predetermined condition is met.

8. The vehicle seat (10) according to claim 7, wherein: The limiting module (17) further comprises a removing device, and when the predetermined condition is met, the removing device applies force to the fixing member to remove it from the first limiting member (171) and the second limiting member (172).

9. The vehicle seat (10) according to claim 2, wherein: The force applying member is constructed as an elastic member having one end fixed to the first limiting member (171) or the second limiting member (172) and the other end fixed to the seat cushion frame.

10. The vehicle seat (10) according to claim 3, wherein: The limiting module (17) is provided with a pair of protrusions (1722) and a pair of grooves (1712), and the pair of protrusions (1722) are arranged at a predetermined angle from each other, and the pair of grooves (1712) are arranged at a predetermined angle from each other.

11. The vehicle seat (10) according to claim 10, wherein: The range of the predetermined angle is set within the range of 100 degrees to 180 degrees.

12. The vehicle seat (10) according to claim 11, wherein: The predetermined angle is set to 180 degrees.

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