Vehicle seat

Abstract

The invention relates to a vehicle seat comprising a seat cushion part, a backrest part rotatable relative to the seat cushion part and a safety belt arranged on the vehicle seat, the safety belt comprises a webbing and a bolt arranged on the webbing, a first end of the webbing is fixed to the seat cushion part via a first retractor, and a second end of the webbing is fixed to the backrest part via a second retractor. The spring bolt is limited at a preset position of the braid; the limiting module comprises a first limiting piece and a second limiting piece which interact with each other, and the first limiting piece is fixed to the side face of the seat cushion part and provided with a first abutting part; the second limiting piece is fixed to the side face of the backrest part and provided with a second abutting part. When a preset condition is met, the backrest part rotates from a first angle to a second angle smaller than the first angle relative to the seat cushion part in the first rotating direction, so that the first limiting piece is driven to rotate relative to the second limiting piece in the first rotating direction; the first abutment portion and the second abutment portion gradually approach and ultimately abut against each other to define the backrest portion at a second angle.

Description

Technical Field

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

[0002] In vehicles, vehicle seats are generally equipped with seat belts as safety protection devices. When the locking tongue on the seat belt is inserted into the buckle, that is, after the seat belt is fastened, the seat belt will not be able to move from the occupant's shoulders to their legs, thereby restricting the occupant to the vehicle seat. However, if the difference between the tension of the seat belt at the shoulders and the tension of the seat belt at the legs is less than a predetermined value, the seat belt can move from the occupant's shoulders to their legs, which will cause the seat belt to be too loose at the legs and thus create a large gap between the legs. This situation includes the backrest of the seat being converted to an upright configuration in response to a vehicle collision, at which time the occupant's legs can move freely relative to the vehicle seat, thereby sliding forward and leaving the vehicle seat.

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

[0004] The object of the present invention is to provide a safer vehicle seat, which is particularly suitable for scenarios where the backrest of the seat is converted towards an upright configuration in the event of a collision.

[0005] The present invention provides a vehicle seat, comprising:

[0006] a seat cushion portion, a backrest portion rotatable relative to the seat cushion portion, and a seat belt provided on the vehicle seat,

[0007] in,

[0008] The safety belt comprises a webbing and a locking tongue arranged on the webbing, 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 defined at a predetermined position of the webbing;

[0009] Limit module, including:

[0010] The first stopper and the second stopper interact with each other,

[0011] The first limiting member is fixed to the side of the seat portion and is provided with a first abutting portion;

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

[0013] When the predetermined condition is met, the backrest portion rotates in a first rotation 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 rotation 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 at the second angle.

[0014] According to an embodiment of the present invention, the first stopper is provided with a first opposite abutting portion spaced apart from the first abutting portion, and the second stopper 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;

[0015] The limiting module is further provided with a force applying member, and the force applying member is configured to apply a force to the first limiting member or the second limiting member to make the two members abut against each other at the first abutting portion and the second abutting portion when the predetermined condition is met.

[0016] 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 portion of the main body portion is constructed to protrude relative to an adjacent portion to form a protrusion positioned in the groove, a pair of circumferentially opposite side surfaces of the protrusion and the groove 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.

[0017] 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.

[0018] According to an embodiment of the present invention, both the first limiting member and the second limiting member are configured as disc-shaped members.

[0019] According to an 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.

[0020] 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.

[0021] According to an embodiment of the present invention, the limiting module 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 and the second limiting member.

[0022] 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.

[0023] 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 interval from each other, and the pair of grooves are arranged at a predetermined angle interval from each other.

[0024] 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.

[0025] According to an embodiment of the present invention, the predetermined angle is set to 180 degrees. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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:

[0027] Figure 1 A vehicle seat according to the invention is shown schematically.

[0028] Figure 2-Figure 4 The limiting module and its components in the vehicle seat according to the present invention are schematically shown. DETAILED DESCRIPTION

[0029] The following will describe the specific implementation of the vehicle seat according to the present invention in conjunction with the accompanying drawings. The following detailed description and the accompanying drawings are used to exemplarily illustrate the principles of the present invention. The present invention is not limited to the preferred embodiments described. The various embodiments described in the present invention can be used alone or in any combination. The scope of protection of the present invention is defined by the claims.

[0030] 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 directions different from those shown in the drawings when used. Obviously, although for ease of description, all of these spatially relative terms refer to the directions shown in the drawings, those skilled in the art will understand that directions different from those shown in the drawings can be used.

[0031] Figure 1 A vehicle seat according to the invention is schematically shown. Figure 1A vehicle seat according to the invention is described.

[0032] like Figure 1 As shown, the vehicle seat 10 of the present invention includes a seat cushion portion 11 and a backrest portion 12, and the backrest portion 12 is rotatable relative to the seat cushion portion 11, that is, the passenger can adjust the angle of the backrest portion 12 relative to the seat cushion portion 11 to improve comfort. In addition, the vehicle seat 10 of the present invention is also equipped with a safety belt, which is arranged on the vehicle seat 10 to fix the passenger on the vehicle seat 10. The safety belt includes a webbing 13 and a locking tongue 14 arranged on the webbing 13, as shown in FIG. Figure 1 In the case shown, the locking tongue 14 is inserted into the lock buckle, which can be used to protect passengers. In the present invention, two retractors are provided for the webbing 13, specifically, the first end of the webbing 13 (i.e., Figure 1 The lower end of the webbing 13 is fixed to the seat cushion 11 via the first retractor 15, and the second end of the webbing 13 (ie, Figure 1 The upper end of the backrest 12 is fixed to the backrest 12 via the second retractor 16, and the locking tongue 14 is limited to a predetermined position of the webbing 13. For example, the locking tongue 14 is fixed in the loop of the webbing 13, and the loop is formed by: a section of the webbing 13 is folded in half and fixed via a suture along the width direction of the webbing to form a ring-shaped section. Since the locking tongue 14 is limited to the changing section, it can be understood that it is limited to the predetermined position of the webbing; for another example, the locking tongue 14 can be limited to the predetermined position of the webbing 13 via a fixing member, bonding, etc.

[0033] It can be understood that if the difference between the tension of the seat belt webbing at the shoulder and the tension at the leg is less than a predetermined value, the webbing can move from the occupant's shoulder to his leg, which will cause the seat belt to be too loose at the leg and thus create a larger gap between the leg. This situation includes the seat backrest rotating toward the upright configuration in response to a vehicle collision, at which time the occupant's legs can move freely relative to the vehicle seat, thereby sliding forward and leaving the vehicle seat. Considering the use of a zero-gravity safety seat, the rotation of the backrest may be configured to cause the seat cushion to rotate, so that the occupant is more likely to slide off the vehicle seat.

[0034] To address this problem, in the present invention, the lock tongue is limited to a predetermined position of the webbing, ensuring that the section of the webbing at the shoulder of the passenger cannot pass through the through hole of the lock tongue and move to the leg. Similarly, ensuring that the section of the webbing at the leg of the passenger 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 respectively tighten the sections of the webbing at the shoulder and leg of the passenger, thereby firmly fixing the passenger to the vehicle seat.

[0035] The vehicle seat of the present invention further comprises 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.

[0036] Figure 2-Figure 4 The limiting module and its components in the vehicle seat according to the present invention are schematically shown. Figure 2-Figure 4 A positioning module in a vehicle seat according to the present invention is described in detail.

[0037] Please refer to Figure 2-Figure 4 The limiting module 17 of the present invention includes a first limiting member 171 and a second limiting member 172. Figure 2 and Figure 3 The first limit member 171 and the second limit member 172 shown in the figure are disc-mounted components, but this is only an example. The shapes of the first limit member and the second limit member of the limit 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.

[0038] Combination Figure 1 As shown, the first position-limiting member 171 is fixed on the side of the seat cushion portion 11, and the second position-limiting member 172 is fixed on the side of the backrest portion 12. In this embodiment, the first position-limiting member 171 is provided with a through-hole portion 1711, and the through-hole portion 1711 is configured to penetrate the entire thickness of the first position-limiting member 171, and can be arranged concentrically with the disc-shaped first position-limiting member 171. At least one section of the through-hole portion 1711 in the circumferential direction is configured to be recessed relative to the adjacent section to form a groove 1712, where "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 FIG. Figure 4 As shown, 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. The second stopper 172 includes a base 1723 and a main body portion 1721 protruding from one side surface of the base 1723, and the main body portion 1721 protrudes from one side surface of the base 1723 in the thickness direction, that is, the second stopper 172 has a greater thickness at the main body portion 1721. The main body portion 1721 is rotatably accommodated in the above-mentioned through hole portion 1711 of the first stopper 171. In addition, at least one portion of the main body portion 1721 is constructed as a protrusion 1722 protruding relative to an adjacent portion, and the protrusion 1722 protrudes radially outward relative to its adjacent portion and will be positioned in the above-mentioned groove 1712 of the first stopper 171. Similarly, as Figure 4As shown, the protrusion 1722 has a first side surface 1722A and a second side surface 1722B that are opposite to each other in the circumferential direction. Therefore, when the first stopper 171 and the second stopper 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 opposite to each other in the circumferential direction.

[0039] 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. Figure 4 As shown, when a predetermined condition is met, the backrest portion 12 rotates in the first rotation direction R relative to the seat cushion portion 11 from a first angle toward a second angle smaller than the first angle, thereby driving the first limiting member 171 to rotate in the first rotation direction R relative to the second limiting member 172, 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 12 relative to the seat cushion portion 11 to the second angle.

[0040] The second side surface 1722B of the protrusion 1722 and the second side surface 1712B of the groove 1712 act as the first opposite abutment portion and the second opposite abutment portion, respectively. When the predetermined condition is not met, the second side surface 1722B of the protrusion 1722 and the second side surface 1712B of the groove 1712 abut against each other to keep the position of the first stopper 171 relative to the second stopper 172 at another position, and the other position makes the first abutment portion and the second abutment portion be a certain distance apart. It can be understood that the certain distance is related to the degree of recovery of the backrest portion 12 relative to the seat cushion portion 11. Specifically, when the certain distance is larger, the degree of recovery of the backrest portion 12 relative to the seat cushion portion 11 is larger, that is, the backrest portion 12 is closer to the upright position; when the certain distance is smaller, the degree of recovery of the backrest portion 12 relative to the seat cushion portion 11 is smaller, that is, the backrest portion 12 is farther from the upright position.

[0041] As an embodiment of the present invention, the limiting module 17 may 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 only an example, and the pair of protrusions and the pair of grooves may be arranged at other angles, such as any angle in the range of 100 degrees to 180 degrees; the limiting module 17 may be provided with other numbers (for example, more than two) of protrusions and grooves on the first limiting member and the second limiting member.

[0042] As an embodiment of the present invention, the surface of the groove 1712 extending in the circumferential direction is configured as a gradual surface 1712C. When the first abutting portion gradually approaches the second abutting portion, as shown in FIG. Figure 4 As shown, the gap between the protrusion 1722 and the gradual surface 1712C becomes smaller and smaller until they contact each other. It can be understood that the setting of the gradual surface can reduce the rotation speed of the first limiter through the friction between itself and the protrusion, so as to reduce the impact generated when the first abutting portion and the second abutting portion abut against each other.

[0043] The first limiting member 171 and the second limiting member 172 are connected in the following manner.

[0044] like Figure 2 As shown, the first stopper 171 is provided with a fixing hole 1713, and four fixing holes 1713 are distributed along the periphery of the first stopper 171. Correspondingly, the second stopper 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 stopper 171 and the second stopper 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, the following configuration is performed: the fixing member is removed when a predetermined condition is met. For this purpose, the stopper module 17 also includes a removal device, which is, for example, a device capable of generating 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 stopper 171 and the second stopper 172, thereby enabling the first stopper 171 and the second stopper 172 to generate relative rotation.

[0045] In addition, the second stopper can be directly fixed on the frame of the backrest of the seat, and the first stopper can be connected to the frame of the cushion part through a recliner, and the recliner is used to adjust the angle of the backrest relative to the cushion part to provide comfort. That is to say, when the predetermined condition is not met, the first stopper and the second stopper are fixed together and do not rotate relative to each other. At the same time, the adjustment of the angle of the backrest relative to the cushion part is achieved by the recliner. As is well known, during the use of the seat, when the angle adjustment of the backrest of the seat is completed, the recliner of the seat is in a locked state, and even if a collision occurs, the backrest of the seat will no longer rotate relative to the cushion part. In the vehicle seat of the present invention, since a stopper module including a first stopper and a second stopper is provided, when a collision occurs, for example, the backrest of the seat is allowed to rotate at a controllable angle (rather than rotating forward without restriction) while tightening the seat belt, so that the occupant will not slide forward from the seat and leave the seat, reducing the injury to the occupant.

[0046] As an embodiment of the present invention, the limit module also includes a force-applying member, which is configured to apply a force to the first limit member or the second limit member to make 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 limit member and the other end is fixed to the frame of the backrest portion. The spring is used to store a certain elastic force, and when the predetermined condition is not met, it cannot drive the backrest portion to rotate. It can be understood that after the fixing member used to lock the first limit member and the second limit 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 limit member, thereby overcoming the friction force on the first limit member and ensuring that the backrest portion rotates to the above-mentioned second angle as soon as possible.

[0047] Of course, the vehicle seat of the present invention is not limited to the above-mentioned examples. For example, the specific structures of the first stopper and the second stopper described above can be interchanged, that is, the second stopper can be provided with a through hole portion, at least one section of the through hole portion in the circumferential direction is constructed to be recessed relative to the adjacent section to form a groove, and the first stopper can be 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 the adjacent part to form a protrusion positioned in the groove. Similarly, a pair of side surfaces of the protrusion and the groove in the circumferential direction that are opposite to each other are respectively constructed as the above-mentioned first abutment portion and the above-mentioned second abutment portion, and another pair of side surfaces of the protrusion and the groove in the circumferential direction that are opposite to each other are respectively constructed as the above-mentioned first opposite abutment portion and the above-mentioned second opposite abutment portion.

[0048] Furthermore, the first opposing abutment and the second opposing abutment respectively provided on the first stopper and the second stopper of the present invention are not limited to the structures described in the above examples. For example, the first abutment and the first opposing abutment of the first stopper can be provided as two separate structures, such as two separate protrusions, and the second abutment and the second opposing abutment of the second stopper can be provided as two separate structures. In addition, the force applying member of the stopper module can also be provided as other devices capable of providing driving force.

[0049] 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.

[0050] 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-mentioned specific embodiments, and the protection scope 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.

Images