Safety belt lock catch device, seat assembly and vehicle
By introducing a reset elastic element and a limiting element into the seat belt buckle device, the interference problem when the seat back is folded is solved, ensuring smooth folding and protecting the safety of the seat and passengers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG GEELY HLDG GRP CO LTD
- Filing Date
- 2025-05-09
- Publication Date
- 2026-04-28
AI Technical Summary
Traditional seatbelt buckle devices can easily interfere with the side wings of the seat back when the seat back is folded forward, hindering the folding action and potentially causing crushing damage.
A seatbelt buckle device is designed, including a pivot, a lock head, a lever, a reset elastic element, and a limiting element. By utilizing the rebound force of the reset elastic element and the limitation of the limiting element, the lock head and lever are ensured to swing back smoothly when the seat back is folded, avoiding excessive swinging and repeated swaying.
It enables smooth forward folding of the seat back, avoids interference between the lock and the side wings of the seat back, protects the safety of passengers and seats, and reduces repeated swinging and inertial impact of the lock.
Smart Images
Figure CN224165825U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of vehicle components, specifically proposing a seat belt buckle device, a seat assembly, and a vehicle. Background Technology
[0002] Currently, with the development of intelligent driving technology and diversified scenarios in intelligent cockpits, people have placed higher demands on the functionality and comfort of seats. For example, in some scenarios, the seat back needs to be folded forward and laid flat. However, with the traditional seat belt buckle fixing mechanism, when the seat back is folded forward, the side wing of the seat back will interfere with the seat belt buckle, thus hindering the folding action of the seat back and possibly even causing compression damage to the seat back. Utility Model Content
[0003] The purpose of this application is to solve at least some of the technical problems mentioned above, and this purpose is achieved through the following technical solutions:
[0004] In a first aspect, this application proposes a seatbelt buckle device, which includes a pivot, a lock head, a rod, a reset elastic element, and a limiting element; one end of the rod is connected to the lock head, and the other end of the rod is connected to the pivot and can rotate around the pivot; the reset elastic element has a first end, a second end, and an elastic part, the first end is connected to the rod, and the second end is connected to the seat, and when the rod rotates around the pivot, the elastic part stores energy and has a restoring force on the rod; the limiting element is connected to the seat and is used to limit the swing position of the rod.
[0005] In some embodiments, the reset elastic element is a first return spring, which applies a first force to the rod; the limiting element is a second return spring, which connects to the rod and applies a second force to the rod; the second force is opposite in direction to the first force; when the rod is in the initial position, the first force and the second force are equal in magnitude; when the rod swings forward toward the vehicle, the first force is greater than the second force.
[0006] In some embodiments, the rod is located between the first return spring and the second return spring. One end of the first return spring and one end of the second return spring are respectively connected to the rod. The other end of the first return spring and the other end of the second return spring are connected to each other and bent to form a protrusion. The protrusion is connected to the seat.
[0007] In some embodiments, the reset elastic element is a first return spring, and the limiting element is a limiting bracket. The limiting bracket has a limiting portion and a bending portion. The bending portion is connected to the seat. When the rod is in the initial position, the limiting portion abuts against the rod.
[0008] In some embodiments, the first end of the first return spring is connected to the side of the rod, or the rod is provided with a connecting hole and the first end of the first return spring is disposed in the connecting hole; the second end of the first return spring is connected to the limiting portion, or the limiting bracket has an extension portion and the second end of the first return spring is connected to the extension portion.
[0009] In some embodiments, the seat belt buckle device further includes an anti-slip element covering the rod, one end of a first return spring being connected to the anti-slip element, and / or a limiting portion abutting against the anti-slip element; and / or, the rod having a limiting protrusion abutting against the limiting protrusion; or, the rod having a limiting groove abutting against the limiting groove.
[0010] In some embodiments, the side of the rod is provided with a recessed groove, and the reset elastic element is partially housed in the recessed groove; and / or, one end of the rotating shaft has an anti-disengagement part, and the other end of the rotating shaft is fitted with a locking element; and / or, a gasket is fitted on the rotating shaft; and / or, a sleeve is fitted on the rotating shaft, and the reset elastic element is fitted on the sleeve.
[0011] In some embodiments, the seatbelt buckle device further includes a locking sensor and its wiring, the locking sensor being disposed within the lock head, and the wiring extending at least partially along the rod; a restraint member being provided on the rod to secure the wiring to the rod; and / or, the rod being fitted with a protective sleeve, and the wiring being at least partially housed within the protective sleeve.
[0012] Secondly, this application proposes a seat assembly including a seat and a seatbelt buckle device as described in the first aspect, the seatbelt buckle device being located on one side of the seat.
[0013] Thirdly, this application proposes a vehicle that includes the seat assembly described in the second aspect.
[0014] The technical solution proposed in this application has at least the following technical effects:
[0015] In this application, the lock head is connected to the lever. When the seat back is folded forward, the side wing of the seat back compresses the lock head, causing the lock head to drive the lever to swing forward relative to the vehicle around the pivot. The lever is equipped with a return elastic element, which has a restoring force on the lever. When the seat back returns to its original position, the lock head also swings back to its original position using the restoring force of the return elastic element, which is convenient and reliable. In addition, the limiting member on the seat limits the swing position of the lever and the lock head, preventing the lock head from swinging back too violently and injuring passengers or the side wing of the seat back; at the same time, it prevents the swing inertia from being too large, causing the lock head to swing beyond the initial position and resulting in repeated swinging. Attached Figure Description
[0016] To better integrate the content illustrated in the accompanying drawings with the description of the specific embodiments, a brief introduction to the drawings is provided below. It is understood that the accompanying drawings mentioned below are merely schematic illustrations of some embodiments of the relevant technical solutions and the technical solutions of this application. Without creative effort, those skilled in the art can create drawings illustrating other embodiments.
[0017] Specifically, the annotations for the accompanying drawings are as follows:
[0018] Figure 1 This is a schematic diagram of the seat assembly described in some embodiments of this application;
[0019] Figure 2 This is a schematic diagram of the structure of the first type of seat belt buckle device described in some embodiments of this application;
[0020] Figure 3 This is a partial exploded view of the first seatbelt buckle device described in some embodiments of this application;
[0021] Figure 4 This is a schematic diagram of the structure of the reset elastic element and the limiting element in the first type of seat belt buckle device described in some embodiments of this application;
[0022] Figure 5 This is a schematic diagram of the structure of the second type of seat belt buckle device described in some embodiments of this application;
[0023] Figure 6 This is a partial exploded view of the second type of seatbelt buckle device described in some embodiments of this application;
[0024] Figure 7 This is a first isometric view of a third type of seatbelt buckle device described in some embodiments of this application;
[0025] Figure 8 This is a second isometric view of a third type of seatbelt buckle device described in some embodiments of this application;
[0026] Figure 9 This is a partial exploded view of the third type of seatbelt buckle device described in some embodiments of this application;
[0027] Figure 10 This is a structural schematic diagram of the fourth type of seat belt buckle device described in some embodiments of this application;
[0028] Figure 11 This is a partial exploded view of the fourth type of seat belt buckle device described in some embodiments of this application.
[0029] Specifically, the annotations for the figure marks in the instruction manual are as follows:
[0030] 10. Rotating shaft; 101. Anti-slip part; 20. Lock head; 30. Rod; 301. Connecting hole; 302. Limiting protrusion; 303. Limiting groove; 401. First return spring; 4011. Protrusion; 402. Limiting bracket; 4021. Limiting part; 4022. Bending part; 4023. Extension part; 403. Second return spring; 50. Anti-slip part; 60. Locking part; 70. Washer; 80. Sleeve; 90. Wiring; 100. Protective cover; 110. Snap-on plate; 120. Restraint strap; 200. Seat; 210. Backrest; 220. Base. Detailed Implementation
[0031] To make the embodiments of this application clearer, they will be described below in conjunction with the accompanying drawings. It is to be understood that the content mentioned below is only a partial embodiment of this application, while the complete list of all embodiments is provided. Therefore, other embodiments obtained based on the following embodiments without any inventive effort all fall within the protection scope of this application.
[0032] It should be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to impose strict limitations on the technical solutions unless the context clearly indicates otherwise. For example, the use of "a," "an," and "the" to modify a feature does not preclude the possibility that the feature may be plural in other embodiments.
[0033] It should be understood that the terms "comprising," "including," and "having" are open-ended, indicating the presence of the stated features but not excluding the possibility of other features in the embodiment. Similarly, the use of terms such as "first," "second," etc., to describe multiple features only indicates the distinction between one feature and another, and such terms do not imply order or sequence unless explicitly stated in the context.
[0034] It should be understood that, unless the context clearly indicates otherwise, the terms "setup," "connection," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a direct connection or an indirect connection via a medium. Those skilled in the art will understand the specific meaning of these terms in this document based on the specific circumstances.
[0035] In addition, for ease of description, the text will use terms of spatial relative relationship to describe the position of one feature relative to another feature, such as "inner", "outer", "end", "side", "upper", "middle", "lower", "high", "low", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It can be understood that the spatial relative relationship between two features should include other specific situations besides those shown in the accompanying drawings of the specification.
[0036] The embodiments of this application are described below with reference to the accompanying drawings. It can be understood that the technical features involved in the different embodiments described below can be combined with each other as long as they do not conflict with each other.
[0037] Firstly, referring to Figures 2 to 11 This application provides a seatbelt buckle device comprising a pivot 10, a lock head 20, a rod 30, a reset elastic member, and a limiting member. One end of the rod 30 is connected to the lock head 20, and the other end of the rod 30 is connected to the pivot 10 and can rotate around the pivot 10. The reset elastic member has a first end, a second end, and an elastic portion. The first end is connected to the rod 30, and the second end is connected to the seat 200. When the rod 30 rotates around the pivot 10, the elastic portion stores energy and has a restoring force on the rod 30. The limiting member is connected to the seat 200 and is used to limit the swing position of the rod 30.
[0038] In this embodiment, the lock head 20 is connected to the rod 30. When the backrest 210 of the seat 200 is folded forward, its side wings press against the lock head 20, causing the lock head 20 to drive the rod 30 to swing forward relative to the vehicle around the pivot 10. The rod 30 is provided with a reset elastic element, which has a restoring force on the rod 30. When the backrest 210 of the seat 200 returns to its original position, the lock head 20 also swings back to its original position using the restoring force of the reset elastic element, which is convenient and reliable. In addition, the limiting member provided on the seat 200 also limits the swing position of the rod 30 and the lock head 20, preventing the lock head 20 from swinging back too violently and injuring passengers or the side wings of the seat back; at the same time, it also prevents the swing inertia from being too large, causing the swing to exceed the initial position and resulting in repeated swinging.
[0039] In some embodiments, refer to Figures 2 to 4 The reset elastic element is a first return spring 401, which applies a first force to the rod 30; the limiting element is a second return spring 403, which connects to the rod 30 and applies a second force to the rod 30; the second force is opposite in direction to the first force; when the rod 30 is in the initial position, the first force and the second force are equal in magnitude; when the rod 30 swings forward of the vehicle, the first force is greater than the second force.
[0040] This embodiment illustrates a specific implementation of the reset elastic element and the limiting element. It utilizes the cooperation of the first return spring 401 and the second return spring 403. The first return spring 401 provides the rebound force, and the second return spring 403 provides the rebound damping force, thereby limiting the swing speed of the rod 30 and achieving the effect of the rod 30 swinging back slowly, avoiding the problem of the lock head 20 swinging back and hitting other objects and repeatedly swinging.
[0041] In some embodiments, refer to Figure 2 and Figure 3The rod 30 is located between the first return spring 401 and the second return spring 403. One end of the first return spring 401 and one end of the second return spring 403 are respectively connected to the rod 30. The other end of the first return spring 401 and the other end of the second return spring 403 are connected to each other and bent to form a protrusion 4011. The protrusion 4011 is connected to the seat 200.
[0042] In this embodiment, the rod 30 is located between the first return spring 401 and the second return spring 403, which facilitates the connection of the first return spring 401 and the second return spring 403 to the rod 30 respectively. Moreover, this arrangement makes full use of the space along the axis of the rotating shaft 10, reducing the space occupied on the side of the seat 200.
[0043] It should be noted that in some embodiments, the rotating shaft 10 and the protrusion 4011 formed by bending the first return spring 401 and the second return spring 403 are all inserted into the seat frame on one side of the seat 200.
[0044] It should be noted that in most vehicles, the seat belts of the left and right seats 200 extend from the B-pillars on both sides of the vehicle body and are inserted into the buckles on the inner side of the seat 200. That is, under normal circumstances, the two seat belt buckles on the left and right seats 200 are positioned facing each other. This embodiment uses a first return spring 401 and a second return spring 403 to achieve a symmetrical overall structure, thus allowing direct adaptation to both the left and right seats 200, resulting in greater versatility.
[0045] In some embodiments, refer to Figures 5 to 11 The reset elastic element is the first return spring 401, and the limiting element is the limiting bracket 402. The limiting bracket 402 has a limiting part 4021 and a bending part 4022. The bending part 4022 is connected to the seat 200. When the rod 30 is in the initial position, the limiting part 4021 abuts against the rod 30.
[0046] This embodiment illustrates another specific implementation of the reset elastic element 40 and the limiting element, namely, the first return spring 401 cooperates with the limiting bracket 402, the first return spring 401 provides the rebound force, and the limiting part 4021 of the limiting bracket 402 limits the swing position of the rod 30, so as to avoid the lock head 20 swinging too violently and hitting other objects and the problem of repeated swinging.
[0047] In addition, refer to Figures 5 to 11 The bending direction of the bent portion 4022 is consistent with the extending direction of the rotating shaft 10, and both are inserted into the seat frame. Further, in some embodiments, referring to... Figure 5 and Figure 6The bending portion 4022 and the limiting portion 4021 bend in the same direction. The bending portion 4022 not only serves to connect with the seat frame, but also limits the maximum forward swing position of the rod 30. That is, the limiting portion 4021 and the bending portion 4022 together limit the swing range of the rod 30. In some embodiments, refer to Figures 7 to 11 The bending direction of the bending portion 4022 is opposite to that of the limiting portion 4021, that is, the bending portion 4022 only serves to connect with the seat frame. All of the above are acceptable implementation methods.
[0048] Specifically, when seatbelt buckle devices are respectively installed on the inner sides of the left and right seats 200, i.e., the two seatbelt buckles are arranged facing each other, in this embodiment, due to the presence of the limiting bracket 402, the overall structure is not symmetrically arranged. That is, the same seatbelt buckle device cannot be directly adapted to the left and right seats 200. Of course, in some embodiments, when the left and right seats 200 are equipped with seatbelt buckle devices in the same direction, the seatbelt buckle device in this embodiment can be directly adapted to the left and right seats 200. That is, the seatbelt buckle device is arranged on the inner side of one seat 200 and on the outer side of the other seat 200, and the seatbelt is led out from the seat 200 rather than from the B-pillar of the vehicle, which is also a desirable implementation method.
[0049] Understandably, in some embodiments not shown in the figures, the seatbelt buckle device may also include a limiting bracket 402 and a first return spring 401 and a second return spring 403, thereby enabling the limiting member to both limit the swing speed of the lever 30 and limit the maximum swing position of the lever 30. Understandably, the maximum swing position may be the initial position before the swing, or slightly greater than the initial position.
[0050] In some embodiments, refer to Figures 5 to 11 The first end of the first return spring 401 is connected to the side of the rod 30, or the rod 30 is provided with a connecting hole 301, and the first end of the first return spring 401 is located in the connecting hole 301; the second end of the first return spring 401 is connected to the limiting part 4021, or the limiting bracket 402 has an extension part 4023, and the second end of the first return spring 401 is connected to the extension part 4023.
[0051] This embodiment illustrates various forms in which the two ends of the first return spring 401 are connected to the rod 30, including: (Refer to...) Figure 10 and Figure 11 The first end of the first return spring 401 is connected to the side of the rod 30, and the second end of the first return spring 401 is connected to the limiting part 4021; the first end of the first return spring 401 is connected to the side of the rod 30, and the second end of the first return spring 401 is connected to the extension part 4023; see reference. Figures 7 to 9The first end of the first return spring 401 is connected to the connecting hole 301, and the second end of the first return spring 401 is connected to the limiting part 4021; see reference. Figure 5 and Figure 6 The first end of the first return spring 401 is connected to the connecting hole 301, and the second end of the first return spring 401 is connected to the extension 4023. The above are all preferred specific embodiments. Of course, the connection between the first return spring 401 and the rod 30 can also be in other specific ways, which will not be described in detail here.
[0052] In some embodiments, refer to Figure 10 and Figure 11 The seat belt buckle device also includes an anti-slip element 50, which covers the rod 30. One end of the first return spring 401 is connected to the anti-slip element 50, and / or the limiting part 4021 abuts against the anti-slip element 50.
[0053] In this embodiment, the anti-slip component 50 can prevent frequent friction between the first return spring 401 and the limiting part 4021 and the rod 30, thus avoiding abnormal noise. Specifically, the anti-slip component 50 can be made of plastic.
[0054] In some embodiments, refer to Figures 7 to 9 The rod 30 is provided with a limiting protrusion 302, and the limiting part 4021 abuts against the limiting protrusion 302; or, refer to Figure 5 and Figure 6 The rod 30 is provided with a limiting groove 303, and the limiting part 4021 abuts against the limiting groove 303.
[0055] In this embodiment, the rod 30 is provided with a limiting protrusion 302 or a limiting groove 303 to abut against the limiting part 4021, and the limiting effect is reliable.
[0056] In some embodiments not shown in the figures, the rod 30 has a groove on at least one side, and the reset elastic member is at least partially housed in the groove.
[0057] In this embodiment, the recess can accommodate the reset elastic element, reducing the space occupied by the structure on the side of the seat 200. Specifically, the rod 30 can have a recess on one side, or recesses on both sides, or a recess on one side and a boss on the other side to reinforce the structural strength. All of these are preferred implementation methods.
[0058] In some embodiments, refer to Figure 2 and Figure 3 as well as Figures 5 to 11 One end of the rotating shaft 10 has an anti-detachment part 101, and the other end of the rotating shaft 10 is fitted with a locking member 60; and / or, refer to Figure 6 , Figure 9 and Figure 11A washer 70 is fitted on at least one side of the rod 30 on the pivot 10; and / or, refer to Figure 6 , Figure 9 and Figure 11 A sleeve 80 is fitted on the rotating shaft 10, and a reset elastic element is fitted on the sleeve 80.
[0059] In this embodiment, the structures on both ends of the rotating shaft 10 are restricted by anti-detachment parts 101 and locking members 60 to prevent axial disengagement. Understandably, in some embodiments, the end of the rotating shaft 10 with the locking member 60 is inserted into the seat frame. Optionally, the rotating shaft 10 is a regular bolt or a stepped bolt, with its nut serving as the anti-detachment part 101. Optionally, the locking member 60 is a snap-locking member, which is snapped and fixed onto the rotating shaft 10. Furthermore, the gasket 70 ensures that there is not excessive space on both sides of the rod 30 to prevent wobbling; the sleeve 80 separates the reset elastic element from the rotating shaft 10 to prevent friction and abnormal noise.
[0060] In some embodiments, refer to Figure 7 , Figure 8 and Figure 10 The seatbelt buckle device also includes a locking sensor and its wiring 90. The locking sensor is located inside the lock head 20, and the wiring 90 extends at least partially along the rod 30. The rod 30 is provided with a restraint member that secures the wiring 90 to the rod 30. And / or, the rod 30 is fitted with a protective sleeve 100, and the wiring 90 is at least partially housed within the protective sleeve 100.
[0061] In this embodiment, the locking sensor can be used to identify whether the seat belt latch is inserted into the buckle; the locking sensor is not shown in the figure. (Refer to...) Figure 7 and Figure 8 The restraint can be a snap-fit plate 110 that snaps onto the rod 30 and / or a restraint strap 120 that tightens onto the rod 30. The snap-fit plate 110 can also be used to prevent the rod 30 from scratching other objects. Similarly, the protective sleeve 100 can also restrict the line 90 and wrap the rod 30 to prevent the rod 30 from scratching other objects. Optionally, the protective sleeve 100 is flocked fabric.
[0062] Secondly, referring to Figure 1 This application proposes a seat assembly including a seat 200 and a seat belt buckle device of the first aspect, the seat belt buckle device being disposed on one side of the seat 200.
[0063] Specifically, the seat 200 includes a backrest 210 and a base 220. The seat belt buckle device can be installed on one side of the base 220. Specifically, the pivot 10 of the seat belt buckle device is connected to the frame of the base 220.
[0064] Thirdly, this application proposes a vehicle that includes the seat assembly described in the second aspect.
[0065] In summary, both the seat assembly of the second aspect and the vehicle of the third aspect include the seat belt buckle device of the first aspect. Therefore, both the seat assembly of the second aspect and the vehicle of the third aspect have at least all the technical effects of the seat belt buckle device of the first aspect, and their specific technical effects will not be elaborated here.
[0066] It should be noted that the embodiments of this application only illustrate the structures of the seat assembly of the second aspect and the vehicle of the third aspect related to the improvement points of this application, but it does not mean that they do not have other structures. For example, the seat assembly of the second aspect also includes a seat heating device, the vehicle of the third aspect also includes a power system, etc. Other structures will not be described one by one here.
[0067] It should be understood that the vehicle can be, but is not limited to, traditional fuel-powered vehicles, new energy vehicles, and flying cars.
[0068] In particular, the term "and / or" in this application should be understood as follows:
[0069] In the first case, the term “and / or” between the first subject and the second subject includes any of the following meanings: (1) only the first subject; (2) only the second subject; and (3) both the first subject and the second subject.
[0070] In the second case, the term "and / or" between the last two of three or more subjects means including at least any one of the subjects. For example, "first subject, second subject and / or third subject" has the same meaning as "first subject and / or second subject and / or third subject", specifically including the following combinations: (1) only the first subject; (2) only the second subject; (3) only the third subject; (4) first subject and second subject and no third subject; (5) first subject and third subject and no second subject; (6) second subject and third subject and no first subject; and (7) first subject, second subject and third subject;
[0071] Furthermore, the character " / " in this application indicates that the objects before and after it are in an "or" relationship.
[0072] Finally, although the embodiments of this application have been described above in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the concept of this application, and such modifications and variations all fall within the scope of protection of this application.
Claims
1. A seatbelt buckle device, characterized in that, Includes a pivot (10), a lock head (20), a lever (30), a reset elastic element, and a limiting element; One end of the rod (30) is connected to the lock head (20), and the other end of the rod (30) is connected to the rotating shaft (10) and can rotate around the rotating shaft (10); The reset elastic element has a first end, a second end and an elastic part. The first end is connected to the rod (30) and the second end is connected to the seat (200). When the rod (30) rotates around the pivot (10), the elastic part stores energy and has a rebound force on the rod (30). The limiting member is connected to the seat and is used to limit the swing position of the rod (30).
2. The seatbelt buckle device according to claim 1, characterized in that, The reset elastic element is a first return spring (401), which applies a first force to the rod (30). The limiting component is a second return spring (403), which connects to the rod (30) and applies a second force to the rod (30); the second force is opposite in direction to the first force. When the rod (30) is in its initial position, the first force and the second force are equal in magnitude; when the rod (30) swings forward toward the vehicle, the first force is greater than the second force.
3. The seatbelt buckle device according to claim 2, characterized in that, The rod (30) is located between the first return spring (401) and the second return spring (403). One end of the first return spring (401) and one end of the second return spring (403) are respectively connected to the rod (30). The other end of the first return spring (401) and the other end of the second return spring (403) are connected to each other and bent to form a protrusion (4011). The protrusion (4011) is connected to the seat (200).
4. The seatbelt buckle device according to claim 1, characterized in that, The reset elastic element is a first return spring (401), and the limiting element is a limiting bracket (402). The limiting bracket (402) has a limiting part (4021) and a bending part (4022). The bending part (4022) is connected to the seat (200). When the rod (30) is in the initial position, the limiting part (4021) abuts against the rod (30).
5. The seatbelt buckle device according to claim 4, characterized in that, The first end of the first return spring (401) is connected to the side of the rod (30), or the rod (30) is provided with a connecting hole (301), and the first end of the first return spring (401) is located in the connecting hole (301); The second end of the first return spring (401) is connected to the limiting part (4021), or the limiting bracket (402) has an extension part (4023), and the second end of the first return spring (401) is connected to the extension part (4023).
6. The seatbelt buckle device according to claim 4, characterized in that, The seat belt buckle device further includes an anti-slip element (50), which covers the rod (30), one end of the first return spring (401) is connected to the anti-slip element (50), and / or the limiting part (4021) abuts against the anti-slip element (50); And / or, the rod (30) is provided with a limiting protrusion (302), and the limiting part (4021) abuts against the limiting protrusion (302); or, the rod (30) is provided with a limiting groove (303), and the limiting part (4021) abuts against the limiting groove (303).
7. The seatbelt buckle device according to any one of claims 1 to 6, characterized in that, The side of the rod (30) is provided with a recessed groove, and the reset elastic element is partially housed in the recessed groove; And / or, one end of the rotating shaft (10) has an anti-detachment part (101), and the other end of the rotating shaft (10) is fitted with a locking member (60); And / or, a gasket (70) is fitted on the rotating shaft (10); And / or, a sleeve (80) is sleeved on the rotating shaft (10), and the reset elastic element is sleeved on the sleeve (80).
8. The seatbelt buckle device according to any one of claims 1 to 6, characterized in that, The seat belt buckle device also includes a locking sensor and its wiring (90), the locking sensor being located inside the lock head (20), and the wiring (90) extending at least partially along the rod (30); The rod (30) is provided with a restraint member, which fixes the line (90) to the rod (30); And / or, the rod (30) is fitted with a protective sleeve (100), and the line (90) is at least partially housed within the protective sleeve (100).
9. A seat assembly, characterized in that, Includes a seat (200) and a seat belt buckle device as described in any one of claims 1 to 8, the seat belt buckle device being disposed on one side of the seat (200).
10. A vehicle, characterized in that, Includes the seat assembly as described in claim 9.