Force limiting device and method based on stepless regulation type safety belt retractor

Abstract

The invention discloses a force limiting device and method based on a stepless adjusting type safety belt retractor. The force limiting device comprises a locking end cover, a force limiting adjusting assembly, a belt shaft and a belt shaft connecting end. The locking end cover is connected with the belt shaft connecting end through the force limiting adjusting assembly and the belt shaft, the belt shaft is connected with the safety belt, and the force limiting adjusting assembly is used for adjusting the limiting force between the belt shaft and the locking end cover. The force limiting adjusting assembly comprises a force limiting rod body, a force limiting rod sleeve and a magnetic adjusting assembly; one end of the force limiting rod body is relatively fixed with the locking end cover; the force limiting rod sleeve is fixedly arranged on the outer side of the force limiting rod body, and the outer side of the force limiting rod body is connected with the tooth-shaped outer sleeve through the magnetic adjusting assembly. The safety belt has the beneficial effects that the pressure of the braid on the chest of a passenger during collision can be effectively relieved through customized force limiting adjustment, more accurate protection can be provided for the passengers of different groups, and secondary injuries caused by a traditional safety belt to the passengers with special body types such as the old and children are avoided.

Description

Technical Field

[0001] This invention relates to the field of seat belts, and more particularly to a force-limiting device and method based on a steplessly adjustable seat belt retractor. Background Technology

[0002] The force limiter element used in traditional seat belts is typically a torsion bar, with one end fixed and the other end connected to the webbing via a hollow spindle. When a vehicle collision occurs, the webbing retracts rapidly, and the spindle drives the torsion bar to twist, releasing a portion of the webbing. This reduces the pressure on the occupant's chest during webbing retraction and prevents secondary injuries.

[0003] Traditional force limiters have a fixed force limit value and cannot be adjusted according to the individual characteristics of the occupant (such as age, gender, physical condition, etc.). Different occupants have different chest pressure resistance, and a fixed force limit value may cause excessive pressure on some occupants (such as the elderly or those with weaker constitutions), leading to secondary injuries. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to solve the technical problems in the prior art and provide a force limiting device and method based on a steplessly adjustable seat belt retractor.

[0005] Technical solution:

[0006] In a first aspect, this application proposes a force-limiting device based on a continuously adjustable seatbelt retractor, comprising:

[0007] Locking end cap, force limiting adjustment assembly, belt shaft, belt shaft connecting end;

[0008] The locking end cap is connected to the belt shaft and the belt shaft connection end via a force limiting adjustment component. The belt shaft is connected to the safety belt. The force limiting adjustment component is used to adjust the force limiting between the belt shaft and the locking end cap.

[0009] Preferably, the force limiting adjustment assembly includes a force limiting rod body, a force limiting rod sleeve, and a magnetic adjustment assembly;

[0010] One end of the force-limiting rod is fixed relative to the locking end cap;

[0011] The force-limiting rod sleeve is fixedly installed on the outside of the force-limiting rod body, and the outside of the force-limiting rod body is connected to the toothed outer sleeve through a magnetic adjustment component;

[0012] The outer side of the toothed outer sleeve is fixedly connected to the belt shaft via the inner sleeve with a belt shaft;

[0013] The inner and outer surfaces of the force-limiting sleeve and the toothed outer sleeve are both prismatic.

[0014] Preferably, the magnetic adjustment component includes a toothed permanent magnet and a toothed inner shell;

[0015] The toothed inner shell is fixed inside the toothed permanent magnet, and the toothed permanent magnet is sleeved on the outside of the force limiting rod sleeve;

[0016] The diameter of the force-limiting rod gradually increases from one end to the other.

[0017] Preferably, the toothed inner shell includes a spring and a top block;

[0018] The inner side of the toothed permanent magnet is connected to the top block via a spring, and the top block can abut against the force-limiting rod sleeve.

[0019] Preferably, the magnetic adjustment assembly further includes a coil fixedly disposed on the outside of the toothed outer sleeve.

[0020] Preferably, one end of the force-limiting rod is provided with a fixing tooth, which is embedded and fixed to one side of the locking end cap.

[0021] Preferably, one end of the force-limiting rod body is connected to the force-limiting rod end cap, and the force-limiting rod end cap is embedded in the shaft connection end.

[0022] Preferably, one end of the toothed outer sleeve is connected to the inner sleeve with shaft via an inner sleeve end cap.

[0023] Preferred options also include:

[0024] Adjustment knob, first conductive patch pair, second conductive patch pair and knob electrode post;

[0025] The adjustment knob is fixed at one end of the knob electrode post, and the first conductive patch pair and the second conductive patch pair are respectively disposed on both sides of the knob electrode post.

[0026] Secondly, this application proposes a force limiting method based on a force limiting device of a steplessly adjustable seat belt retractor, including a locking end cap, a force limiting adjustment assembly, a belt shaft, and a belt shaft connecting end;

[0027] The locking end cap is connected to the belt shaft and the belt shaft connection end via a force limiting adjustment component. The belt shaft is connected to the safety belt. The force limiting adjustment component is used to adjust the force limiting between the belt shaft and the locking end cap.

[0028] Beneficial effects: This invention proposes a steplessly adjustable force limiter design, allowing the force limit of the seat belt to be adjusted according to the different physical characteristics of the occupants, such as gender, age, and body type. This customized force limit adjustment not only effectively reduces the pressure of the webbing on the occupant's chest during a collision, but also provides more precise protection for different groups of occupants, avoiding secondary injuries caused by traditional seat belts to occupants with special body types, such as the elderly and children.

[0029] Traditional seat belts have fixed force limiting values, which cannot take into account the specific physical condition of the occupants. However, this invention uses an adjustable force limiting system to ensure that the force of the webbing pull back is matched to the occupant's bearing capacity during a collision. This greatly reduces the risk of internal injury caused by inappropriate force limiting values ​​and significantly improves the safety of occupants in collision accidents. Attached Figure Description

[0030] Figure 1 A three-dimensional schematic diagram is provided for this invention;

[0031] Figure 2 A schematic diagram of one side of the structure is provided for this invention;

[0032] Figure 3 A cross-sectional structural schematic diagram is provided for this invention;

[0033] Figure 4 This application provides a structural block diagram of the force-limiting rod;

[0034] Figure 5 This application provides a structural block diagram of the toothed outer sleeve;

[0035] Figure 6 This application provides a block diagram of the coil structure;

[0036] Figure 7 This application provides a structural block diagram of an inner sleeve with a shaft;

[0037] Figure 8 This application provides a block diagram of the toothed inner shell structure;

[0038] Figure 9 This application provides a structural block diagram of a toothed permanent magnet.

[0039] Figure label:

[0040] 1. Locking end cap; 2. Force limiting rod body; 3. Force limiting rod sleeve; 4. Toothed inner shell; 5. Toothed permanent magnet; 6. Force limiting rod end cap; 7. Toothed outer sleeve; 8. Coil; 9. Inner sleeve with shaft; 10. Inner sleeve end cap; 11. With shaft; 12. With shaft connecting end; 13. Adjusting knob; 14. First conductive patch pair; 15. Second conductive patch pair; 16. Knob electrode post; 17. Spring; 18. Top block; 19. Fixing tooth. Detailed Implementation

[0041] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Example 1

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but do not exclude other elements or objects.

[0044] In response to the problems existing in the current technology, such as Figure 1-9 As shown, a force-limiting device based on a steplessly adjustable seatbelt retractor is proposed, comprising:

[0045] Locking end cap 1, force limiting adjustment assembly, belt shaft 11, belt shaft connecting end 12;

[0046] The locking end cap 1 is connected to the belt shaft connection end 12 via a force limiting adjustment component, a belt shaft 11, and a belt shaft connection end 12. The belt shaft 11 is connected to the safety belt. The force limiting adjustment component is used to adjust the force limiting between the belt shaft 11 and the locking end cap 1.

[0047] Specifically, this application uses a force-limiting adjustment device to adjust the force limit of the seat belt according to the occupant's body shape requirements. Therefore, the pull-back force of the webbing is more in line with the force limit that the driver can withstand. This seat belt can better protect the driver and is more in line with the needs of modern intelligent vehicles.

[0048] In some specific embodiments, the force limiting adjustment assembly includes a force limiting rod body 2, a force limiting rod sleeve 3, and a magnetic adjustment assembly;

[0049] One end of the force-limiting rod 2 is fixed relative to the locking end cap 1;

[0050] The force-limiting rod sleeve 3 is fixedly installed on the outside of the force-limiting rod body 2, and the outside of the force-limiting rod body 2 is connected to the toothed outer sleeve 7 through a magnetic adjustment component;

[0051] The outer side of the toothed outer sleeve 7 is fixedly connected to the shaft 11 via the inner sleeve 9 with shaft.

[0052] The inner and outer surfaces of the force-limiting sleeve 3 and the toothed outer sleeve 7 are both prismatic.

[0053] Specifically, during use, the force-limiting rod body 2 is fixed to the locking end cap 1, and the shaft connecting end 12 can rotate relative to the force-limiting rod body 2. Since the shaft 11 and the shaft connecting end 12 are connected, the rotation of the shaft 11 relative to the force-limiting rod body 2 is facilitated by the prism-shaped force-limiting rod sleeve 3 and the toothed outer sleeve 7. In some embodiments, it can be a hexagonal prism-shaped cylindrical structure.

[0054] In some specific embodiments, the magnetic adjustment assembly includes a toothed permanent magnet 5 and a toothed inner shell 4;

[0055] The toothed inner shell 4 is fixed inside the toothed permanent magnet 5, and the toothed permanent magnet 5 is sleeved on the outside of the force limiting rod sleeve 3;

[0056] The diameter of the force-limiting rod 2 gradually increases from one end to the other.

[0057] Specifically, this application designs the force-limiting rod body 2 and the toothed inner shell 4 as separate types. The toothed inner shell 4 and the toothed permanent magnet 5 can move laterally on the force-limiting rod sleeve 3. The ultimate torsional force that the force-limiting rod body 2 can withstand is related to the axial position of the toothed inner shell 4. Based on the free setting of the thickness of the two ends of the force-limiting rod body 2, it can be configured such that the farther the toothed inner shell 4 is from the left end of the force-limiting rod body 2, the weaker its load-bearing capacity and the greater its torsional limit; the closer the toothed inner shell 4 is to the left end of the force-limiting rod body 2, the stronger its load-bearing capacity and the weaker its torsional limit. Since the toothed inner shell 4 can move left and right, it can adjust the force-limiting value of the force-limiting rod, thereby meeting the needs of different drivers who can withstand different seat belt webbing pull-back forces.

[0058] In some specific embodiments, the toothed inner shell 4 includes a spring 17 and a top block 18;

[0059] The inner side of the toothed permanent magnet 5 is connected to the top block 18 via a spring 17, and the top block 18 can abut against the force limiting sleeve 3.

[0060] Specifically, through the squeezing action of the spring 17 on the top block 18, and the uniform increase or decrease in thickness at both ends of the force limiting rod 2, the toothed inner shell 4 generates different squeezing forces on the force limiting rod sleeve 3 when sliding to different positions on the outside of the force limiting rod, so as to achieve the magnitude of force limiting at different positions.

[0061] In some specific embodiments, the magnetic adjustment assembly further includes a coil 8 fixedly disposed on the outside of the toothed outer sleeve 7.

[0062] In some specific embodiments, one end of the force limiting rod 2 is connected to a fixing tooth 19, which is embedded and fixed to one side of the locking end cover 1, so that the one end of the force limiting rod 2 can be relatively fixed to one end of the locking end cover 1.

[0063] In some specific embodiments, one end of the force-limiting rod body 2 is connected to the force-limiting rod end cap 6, and the force-limiting rod end cap 6 is embedded in the shaft connection end 12, so that the force-limiting rod body 2 can rotate relative to the force-limiting rod end cap 6.

[0064] In some specific embodiments, one end of the toothed outer sleeve 7 is connected to the inner sleeve 9 with shaft via the inner sleeve end cap 10.

[0065] In some specific embodiments, it also includes:

[0066] Adjustment knob 13, first conductive patch pair 14, second conductive patch pair 15 and knob electrode post 16;

[0067] The adjustment knob 13 is fixed to one end of the knob electrode post 16, and the first conductive patch pair 14 and the second conductive patch pair 15 are respectively disposed on both sides of the knob electrode post 16.

[0068] Specifically, when the vehicle is powered off and the driver does not adjust the adjustment knob 13, the electrode post 16 of the force limiter knob is in an unconnected state, the hexagonal coil 8 inside the seat belt retractor is not energized, and at this time the adjustment knob 13 and the toothed permanent magnet 5 are in the middle position of the force limiter body 2.

[0069] When the driver adjusts the knob 13 to the left, the electrode post 16 of the force limiter knob is connected to the first conductive patch pair. Since the first conductive patch pair is connected to the seat belt retractor control chip through the wire, the control chip will energize the hexagonal coil 8 and generate a magnetic field force with the direction of SN. At this time, the toothed permanent magnet 5 is attracted to move to the left, thereby increasing the force limiter value of the force limiter.

[0070] When the driver adjusts the knob 13 to the right, the electrode post 16 of the force limiter knob is connected to the second conductive patch pair 15. Since the second conductive patch pair 15 is connected to the seat belt retractor control chip through the wire, the control chip will energize the hexagonal coil 8, which will generate a magnetic field force with the direction of N-S. At this time, the toothed permanent magnet 5 is repelled and moves to the right, reducing the force limiter value of the force limiter.

[0071] When a vehicle collision occurs, because the force limiting value has been pre-adjusted, the chest pressure exerted on the driver when the webbing pulls back after the driver leaves the vehicle is adjusted, thus better protecting the driver and preventing secondary injuries. In the unadjusted state, the toothed permanent magnet is in the middle position of the force limiting rod 2, and the force limiting value of the force limiting rod 2 is the traditional force limiting value of a car. When the toothed permanent magnet moves to the right, its force limiting value decreases by a percentage. When the toothed permanent magnet 5 moves to the far right, its force limiting value is reduced to half of the standard value; the same applies when the toothed permanent magnet 5 moves to the left.

[0072] In some specific embodiments, the inner side of the shaft 11 is a prismatic shape that cooperates with the inner sleeve 9 of the shaft to drive a rotatable connection, and the inner side of the inner sleeve 9 of the shaft is a prismatic shape that cooperates with the outer side of the toothed permanent magnet 5 to drive a rotatable connection.

[0073] In some specific embodiments, a force limiting method for the force limiting device based on the stepless adjustable seat belt retractor is proposed, characterized in that it includes a locking end cap 1, a force limiting adjustment component, a belt shaft 11, and a belt shaft connecting end 12.

[0074] The locking end cap 1 is connected to the belt shaft connection end 12 via a force limiting adjustment component, a belt shaft 11, and a belt shaft connection end 12. The belt shaft 11 is connected to the safety belt. The force limiting adjustment component is used to adjust the force limiting between the belt shaft 11 and the locking end cap 1.

[0075] When a vehicle collides, the force limiter inside the large inertia seat belt retractor will twist. The twisting of the force limiter 2 will cause the belt shaft 11 to release part of the webbing, preventing secondary injury to the driver due to the rapid pullback of the webbing.

[0076] The existing seat belt retractor has its internal force limiting rod body 2 fixed to the inner shell of the force limiting rod, so the force limiting value of the force limiting rod cannot be adjusted.

[0077] This invention patent designs the force-limiting rod body 2 and the force-limiting rod teeth (the toothed inner shell 4 and the toothed permanent magnet 5 in this application) as separate types. The toothed inner shell 4 and the permanent magnet teeth can move laterally on the force-limiting rod sleeve 3. The ultimate torsional force that the force-limiting rod body 2 can withstand is related to the axial position of the force-limiting rod teeth. The farther the force-limiting rod teeth are from the left end of the force-limiting rod body 2, the weaker its load-bearing capacity and the greater its torsional limit; the closer the force-limiting rod teeth are to the left end of the force-limiting rod body 2, the stronger its load-bearing capacity and the weaker its torsional limit. Since the force-limiting rod teeth can move left and right, the force-limiting value of the force-limiting rod can be adjusted, thereby meeting the needs of different drivers who can withstand different seat belt webbing pull-back forces.

[0078] The movement of the force limiting rod tooth profile is achieved through the permanent magnet tooth outer sleeve 7 and the hexagonal coil 8.

[0079] The hexagonal coils 8 are arranged in a sparse-on-left-dense configuration on the surface of the permanent magnet body-shaped outer sleeve. When the coils 8 are energized, they generate a magnetic field. The magnetic field is amplified by passing through the surface of the toothed outer sleeve 7. The movement of the permanent magnet teeth is controlled by the repulsion and attraction between the magnetic field force and the toothed permanent magnet, thereby adjusting the limiting force value of the limiting rod.

[0080] The above description is merely a specific implementation of the embodiments of the present invention, but the protection scope of the embodiments of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiments of the present invention should be covered within the protection scope of the embodiments of the present invention. Therefore, the protection scope of the embodiments of the present invention should be determined by the protection scope of the claims.

Claims

1. A force-limiting device based on a steplessly adjustable seatbelt retractor, characterized in that, include: Locking end cap (1), force limiting adjustment assembly, belt shaft (11), belt shaft connecting end (12); The locking end cap (1) is connected to the belt shaft connection end (12) via a force limiting adjustment component, a belt shaft (11), and the belt shaft (11) is connected to the safety belt. The force limiting adjustment component is used to adjust the force between the belt shaft (11) and the locking end cap (1).

2. The force-limiting device based on a steplessly adjustable seatbelt retractor according to claim 1, characterized in that, The force limiting adjustment assembly includes a force limiting rod body (2), a force limiting rod sleeve (3), and a magnetic adjustment assembly; One end of the force-limiting rod (2) is fixed relative to the locking end cap (1); The force limiting rod sleeve (3) is fixedly installed on the outside of the force limiting rod body (2), and the outside of the force limiting rod body (2) is connected to the toothed outer sleeve (7) through a magnetic adjustment component; The outer side of the toothed outer sleeve (7) is fixedly connected to the shaft (11) through the inner sleeve (9); The inner and outer surfaces of the force-limiting sleeve (3) and the toothed outer sleeve (7) are both prismatic.

3. The force-limiting device based on a steplessly adjustable seatbelt retractor according to claim 2, characterized in that, The magnetic adjustment component includes a toothed permanent magnet (5) and a toothed inner shell (4). The toothed inner shell (4) is fixed inside the toothed permanent magnet (5), and the toothed permanent magnet (5) is sleeved on the outside of the force limiting rod sleeve (3); The diameter of the force-limiting rod (2) gradually increases from one end to the other.

4. The force-limiting device based on a steplessly adjustable seatbelt retractor according to claim 3, characterized in that, The toothed inner shell (4) includes a spring (17) and a top block (18); The inner side of the toothed permanent magnet (5) is connected to the top block (18) via a spring (17), and the top block (18) can abut against the force limiting sleeve (3).

5. A force-limiting device based on a steplessly adjustable seatbelt retractor according to claim 3, characterized in that, The magnetic adjustment assembly also includes a coil (8) fixed on the outside of the toothed outer sleeve (7).

6. A force-limiting device based on a steplessly adjustable seatbelt retractor according to claim 2, characterized in that, One end of the force limiting rod (2) is connected to a fixing tooth (19), which is embedded and fixed to one side of the locking end cap (1).

7. A force-limiting device based on a steplessly adjustable seatbelt retractor according to claim 2, characterized in that, One end of the force limiting rod body (2) is connected to the force limiting rod end cap (6), and the force limiting rod end cap (6) is embedded in the shaft connection end (12).

8. A force-limiting device based on a steplessly adjustable seatbelt retractor according to claim 2, characterized in that, One end of the toothed outer sleeve (7) is connected to the inner sleeve (9) with shaft through the inner sleeve end cap (10).

9. A force-limiting device based on a steplessly adjustable seatbelt retractor according to claim 1, characterized in that, Also includes: Adjustment knob (13), first conductive patch pair (14), second conductive patch pair (15) and knob electrode post (16). The adjustment knob (13) is fixed at one end of the knob electrode post (16), and the first conductive patch pair (14) and the second conductive patch pair (15) are respectively disposed on both sides of the knob electrode post (16).

10. A force-limiting method for a force-limiting device based on a continuously adjustable seatbelt retractor as described in any one of claims 1-9, characterized in that, Includes a locking end cap (1), a force limiting adjustment assembly, a belt shaft (11), and a belt shaft connecting end (12); The locking end cap (1) is connected to the belt shaft connection end (12) via a force limiting adjustment component, a belt shaft (11), and the belt shaft (11) is connected to the safety belt. The force limiting adjustment component is used to adjust the force between the belt shaft (11) and the locking end cap (1).

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