Safety belt locking device and safety belt assembly

Abstract

The utility model discloses a safety belt locking device and a safety belt assembly, the safety belt locking device comprises a spring bolt body, the spring bolt body is provided with a hollow groove, and the groove is used for a belt part to penetrate through; the clamping piece is hinged to the position, corresponding to the groove, of the spring bolt body through a hinge shaft, and the clamping piece is provided with a first clamping part; the spring bolt body is further provided with a second clamping part extending outwards from the spring bolt body, and when the belt component is arranged in the groove in a penetrating mode, the belt component is located between the first clamping part and the second clamping part; the elastic element and the clamping piece are arranged in a related mode, the elastic element applies elastic force to the clamping piece so that the clamping piece can be kept at a release station, and a gap is formed between the first clamping part and the second clamping part at the release station; when the clamping piece is subjected to external force resisting elastic force, the clamping piece rotates around a hinge shaft of the clamping piece so as to rotate from a release station to a clamping station, and the first clamping part and the second clamping part clamp the belt component at the clamping station.

Description

Technical Field

[0001] The utility model relates to a seat belt device, in particular to a locking device. Background Art

[0002] Seat belts are common safety accessories in vehicles, such as means of transportation.

[0003] A common seat belt structure is that a nylon belt passes through a slot of a tongue installed on a seat. When a user is traveling in a vehicle, the tongue is inserted into a buckle installed on the seat, so that the seat belt can restrain the user's body.

[0004] For the currently common seat belt tongues, the seat belt only passes through the slot of the tongue without a clamping function. Therefore, when a collision occurs, the seat belt will still slide between the user's waist and chest, and thus cannot prevent the passenger from moving forward further. Summary of the Utility Model

[0005] One of the purposes of the utility model is to provide a seat belt locking device, which can lock the sliding of the seat belt when a collision occurs, so as to restrain the forward movement distance of the human hip, make the seat belt on the waist share the impact kinetic energy of the lower body, and make the shoulder seat belt only need to bear the kinetic energy of the chest, thereby further ensuring the safety of the passenger.

[0006] To achieve the above purpose, the utility model provides a seat belt locking device, which includes a tongue body. The tongue body has a hollowed slot for threading a belt component. In addition:

[0007] The seat belt locking device further includes a clamping member, which is hinged to the tongue body at a position corresponding to the slot through a hinge shaft. The clamping member has a first clamping portion.

[0008] The tongue body further has a second clamping portion extending outwards from the tongue body. When the belt component is threaded in the slot, it is located between the first clamping portion and the second clamping portion.

[0009] An elastic element is associated with the clamping member and applies an elastic force to the clamping member to keep the clamping member in a release position. In the release position, there is a gap between the first clamping portion and the second clamping portion.

[0010] Wherein, when the clamping member is subjected to an external force resisting the elastic force, it rotates around its hinge shaft to rotate from the release position to the clamping position. In the clamping position, the first clamping portion and the second clamping portion clamp the belt component.

[0011] Further, in some embodiments of the present utility model, the clamping member is configured as a U shape, which includes the first clamping portion and the arms extending from two axial ends of the first clamping portion.

[0012] Further, in some embodiments of the present utility model, the hinge shaft is configured as two short pin shafts respectively connected to the two arms.

[0013] Further, in some embodiments of the present utility model, the elastic element is configured as a torsion spring.

[0014] Further, in some embodiments of the present utility model, the cross-section of the first clamping portion is in a runway shape.

[0015] Further, in some embodiments of the present utility model, the extension length of the second clamping portion in the length direction corresponds to the axial extension length of the first clamping portion.

[0016] Further, in some embodiments of the present utility model, the cross-section of the second clamping portion is in an arc shape.

[0017] Further, in some embodiments of the present utility model, the geometric axis of the hinge shaft and the first clamping portion are respectively located on both sides of the belt member.

[0018] Another object of the present utility model is to provide a seat belt assembly, which can lock the slippage of the seat belt when a collision occurs, thereby restricting the forward movement distance of the human hip, allowing the seat belt of the waistband to share the impact kinetic energy of the lower body, and allowing the shoulder seat belt to only bear the kinetic energy of the chest, thereby effectively ensuring the safety of the occupant.

[0019] Based on the above utility model object, the present utility model further provides a seat belt assembly, which includes a belt member and the seat belt locking device as described above, wherein the belt member is threaded through the slot and wrapped around the first clamping portion between the first clamping portion and the second clamping portion, wherein at the release position, the belt member can move freely in the gap, and at the clamping position, the belt member is clamped between the first clamping portion and the second clamping portion.

[0020] The seat belt locking device of the present utility model, through the first clamping portion and the second clamping portion, when the force value that tightens the belt member exceeds the elastic critical value of the elastic element, the first clamping portion will rotate to the clamping position, squeezing the seat belt, realizing locking the slippage of the seat belt when a collision occurs, thereby restricting the forward movement distance of the occupant's hip, allowing the seat belt of the waistband to share the impact kinetic energy of the lower body, and allowing the shoulder seat belt to only bear the kinetic energy of the chest, thereby reducing the pressure of the chest seat belt on the chest cavity and reducing the injury to the chest.

[0021] The safety belt assembly described in the utility model also has the above beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional structural schematic diagram of the seat belt locking device of the utility model in one embodiment at one viewing angle is shown.

[0023] Figure 2 A three-dimensional structural schematic diagram of the seat belt locking device of the utility model in another viewing angle under one embodiment is shown.

[0024] Figure 3 A three-dimensional structural schematic diagram of a safety belt assembly according to the utility model in one embodiment is shown.

[0025] Figure 4 A front view of a safety belt assembly according to the present invention is shown.

[0026] Figure 5 The state of the utility model in a release position under one embodiment is shown in a sectional view.

[0027] Figure 6 The state of the utility model in a clamping station under one embodiment is shown in a sectional view.

[0028] Figure 7 A three-dimensional structural schematic diagram of a clamping member of a seat belt locking device or a seat belt assembly according to the utility model in one embodiment is shown. DETAILED DESCRIPTION

[0029] The seat belt locking device and the seat belt assembly of the present invention will be further explained and illustrated below in conjunction with the accompanying drawings and specific embodiments of the specification. However, such explanation and illustration do not constitute an improper limitation on the technical solution of the present invention.

[0030] The common seat belt structure is a nylon belt passing through the slot of the lock tongue installed on the seat. When riding in a vehicle, the passenger inserts the lock tongue into the lock seat set on the seat to buckle the seat belt. However, for the current seat belt lock tongue, the seat belt only passes through the slot of the lock tongue without a clamping function. Therefore, when a collision occurs, the seat belt will still slide between the waist and chest of the passenger, thereby failing to prevent the passenger from moving forward.

[0031] In view of the above technical problems, the utility model provides a seat belt locking device in one embodiment.

[0032] Figure 1Shows a three-dimensional structural schematic diagram of the seat belt locking device according to the present utility model from one perspective (front) in an embodiment.

[0033] Figure 2 Shows a three-dimensional structural schematic diagram of the seat belt locking device according to the present utility model from another perspective (back) in an embodiment.

[0034] As Figure 1 and Figure 2 shown, in some embodiments, the seat belt locking device includes a tongue body 1, a clamping member 2, and an elastic element 3.

[0035] The tongue body has a hollowed-out groove 11 and a buckle portion 12. The groove 11 is used for threading a belt member, and the buckle portion 12 is used for inserting into a lock seat on the seat, so as to fasten the seat belt on the occupant. In addition, the tongue body 1 also has a second clamping portion 13 extending outward from the tongue body 1.

[0036] The clamping member 2 is hinged to the tongue body 1 at a position corresponding to the groove through a hinge shaft. The clamping member 2 has a first clamping portion 21, which is located between the first clamping portion 21 and the second clamping portion 13 when the belt member is threaded through the groove.

[0037] The elastic element 3 is associated with the clamping member 2 and applies an elastic force to the clamping member 2, so as to hold the clamping member 2 in a release position. In this release position, there is a gap between the first clamping portion 21 and the second clamping portion 13. When the clamping member 2 is subjected to an external force resisting the elastic force, it rotates around its hinge shaft to rotate from the release position to a clamping position. In the clamping position, the first clamping portion 21 and the second clamping portion 13 clamp the belt member.

[0038] In another embodiment, the present utility model also provides a seat belt assembly, which includes a belt member 4 and the seat belt locking device as described above.

[0039] Figure 3 Shows a three-dimensional structural schematic diagram of the seat belt assembly according to the present utility model in an embodiment.

[0040] Figure 4 Shows a front view of the seat belt assembly according to the present utility model in an embodiment.

[0041] As Figure 3 and Figure 4 shown, the belt member 4 is threaded through the groove of the tongue body and passes between the first clamping portion 21 and the second clamping portion 13, and is wrapped around the first clamping portion 21 in a U shape.

[0042] As Figure 5As shown, when the clamping member is in the release position, the belt member 4 can move freely in the gap between the first clamping portion 21 and the second clamping portion 13.

[0043] When a collision occurs, the belt member 4 is tensioned. At this time, the belt member 4 applies a force to the clamping member 2 through friction, causing it to rotate counterclockwise around the hinge axis, so that the first clamping portion 21 approaches the second clamping portion until it reaches the Figure 6 shown clamping position. At this clamping position, the belt member 4 is clamped between the first clamping portion 21 and the second clamping portion 13. Thus, when a collision occurs, the slip of the belt member is locked, thereby restricting the forward movement distance of the occupant's buttocks. Let the seat belt of the waist share the impact kinetic energy of the lower body, and let the shoulder belt only bear the kinetic energy of the chest, thereby reducing the pressure of the chest seat belt on the chest cavity and reducing the injury to the chest.

[0044] Figure 7 Shows a three-dimensional structural schematic diagram of the clamping member of the seat belt locking device or seat belt assembly according to the present invention in an embodiment.

[0045] As Figure 7 shown, in some embodiments of the present invention, the clamping member 2 is configured as a U shape, which includes a first clamping portion 21 extending in the axial direction of the hinge axis and arms 22 extending from two axial ends of the first clamping portion. With this arrangement, there is a certain distance between the first clamping portion 21 and the hinge axis. Thus, as the clamping member rotates around the hinge axis, the first clamping portion 21 can approach the second clamping portion, thereby realizing the switching from the release position to the clamping position.

[0046] As Figure 1 and Figure 3 shown, in some embodiments of the present invention, the geometric axis P of the hinge axis and the first clamping portion 21 are respectively located on both sides of the belt member 4.

[0047] With this arrangement, when the belt member 4 is subjected to a tension force, it will not Figure 3 contact the hinge axis on the left side and move axially, but tightly wrap around the first clamping portion 21, thereby effectively avoiding edge clamping and edge tearing of the belt member edge, and thus greatly improving the safety service life of the seat belt.

[0048] As Figure 1 and Figure 7 shown, in some more specific embodiments of the present invention, the hinge axis can be configured as two short pin shafts 5 respectively connected to the two arms 22 of the clamping member 2.

[0049] Of course, in other embodiments, the hinge shaft can also be configured as a long shaft, and both ends of the long shaft are respectively connected to the arms of the clamping member.

[0050] However, compared with setting the hinge shaft as a long shaft, the long shaft and the first clamping portion 21 are also respectively located on both sides of the belt member 4. In some more specific embodiments, in order not to interfere with the second clamping portion, it can be arranged outside the second clamping portion. In this case, the arms of the clamping member have a longer extension length. In some other more specific embodiments, the long shaft can also be formed as the second clamping portion.

[0051] In some more specific embodiments of the present utility model, the short pin shaft 5 can be fixedly connected to the arm by interference fit, and the short pin shaft can be arranged in the hole formed on the flange 14 of the lock tongue body by clearance fit and can rotate in the hole.

[0052] In some more specific embodiments of the present utility model, the elastic element 3 can be configured as a torsion spring. One leg of the torsion spring can abut against the lock tongue body, and the other leg of the torsion spring can abut against the hinge shaft or the clamping member.

[0053] In some more specific embodiments of the present utility model, the elastic element 3 can also be configured as an elastic band or a similar element that applies a torsional force to the clamping member.

[0054] As Figure 5 and Figure 6 shown, in some embodiments of the present utility model, the cross-section of the first clamping portion 21 can be in a runway shape.

[0055] As Figure 1 shown, in some more specific embodiments of the present utility model, the extension length of the second clamping portion 13 in the length direction corresponds to the axial extension length of the first clamping portion. Such an arrangement can enable the present utility model to have a larger clamping contact area, thereby further improving the clamping effect.

[0056] Of course, in some other more specific embodiments, the extension length of the second clamping portion in the length direction can also be shorter than the axial extension length of the first clamping portion.

[0057] As Figure 1 、 Figure 5 and Figure 6 shown, in some more specific embodiments of the present utility model, the cross-section of the second clamping portion 13 is arc-shaped.

[0058] Of course, in some other more specific embodiments, the cross-section of the second clamping portion 13 can also be L-shaped.

[0059] It should be noted that the terms "up", "down", "left", "right" and "counterclockwise" described in this article are for ease of understanding and are based on Figures 1 to 7 This is an exemplary description of the setting method and direction, which is not intended to limit the present invention.

[0060] It should be noted that the prior art part in the protection scope of the utility model is not limited to the embodiments given in the application documents. All prior art that does not contradict the scheme of the utility model, including but not limited to prior patent documents, prior public publications, prior public uses, etc., can be included in the protection scope of the utility model.

[0061] In addition, the combination of the various technical features in this case is not limited to the combination described in the claims of this case or the combination described in the specific embodiments. All technical features recorded in this case can be freely combined or combined in any way unless there is a contradiction between them.

[0062] It should also be noted that the above-listed embodiments are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and similar changes or modifications made therewith are directly derived or easily associated with the contents disclosed by those skilled in the art from the present invention, and should all fall within the protection scope of the present invention.

Claims

1. A safety belt locking device, comprising a locking tongue body, wherein the locking tongue body has a hollow groove, and the groove is used to pass a belt component; characterized in that: The seat belt locking device further comprises a clamping member, which is hinged to the locking tongue body via a hinge shaft at a position corresponding to the groove, and the clamping member has a first clamping portion; The locking tongue body also has a second clamping portion extending outward from the locking tongue body, and when the belt member is inserted into the groove, the second clamping portion is located between the first clamping portion and the second clamping portion; an elastic element, which is associated with the clamping member and applies an elastic force to the clamping member to keep the clamping member in a release position, in which a gap exists between the first clamping portion and the second clamping portion; When the clamping member is subjected to an external force resisting the elastic force, it rotates around its hinge axis to rotate from a releasing position to a clamping position, where the first clamping portion and the second clamping portion clamp the belt component.

2. The seat belt locking device according to claim 1, characterized in that: The geometric axis of the hinge shaft and the first clamping portion are respectively located on two sides of the belt component.

3. The seat belt locking device according to claim 1, characterized in that: The clamping member is configured in a U shape and includes the first clamping portion and arms extending from two axial ends of the first clamping portion.

4. The seat belt locking device according to claim 3, characterized in that: The hinge shaft is constructed as two short pin shafts respectively connected to the two arms.

5. The seat belt locking device according to claim 1, characterized in that: The elastic element is designed as a torsion spring.

6. The seat belt locking device according to claim 1, characterized in that: The cross section of the first clamping portion is in a racetrack shape.

7. The seat belt locking device according to claim 1, characterized in that: An extension length of the second clamping portion in the length direction corresponds to an axial extension length of the first clamping portion.

8. The seat belt locking device according to claim 1, characterized in that: The cross section of the second clamping portion is arc-shaped.

9. A safety belt assembly, comprising a belt component, characterized in that: It also includes a seat belt locking device as described in any one of claims 1 to 8, wherein the belt component is inserted into the groove and passes between the first clamping part and the second clamping part and is wrapped around the first clamping part, wherein at the release station, the belt component can move freely between the gap, and at the clamping station, the belt component is clamped between the first clamping part and the second clamping part.

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