Safety belt locking device and safety belt assembly

Abstract

A safety belt locking device, comprising a tongue body (1), wherein the tongue body (1) is provided with a hollowed-out slot (11), the slot (11) being adapted for passage of a strap component (4). In addition, the safety belt locking device further comprises: a clamping member (2), which is hinged to the tongue body (1), by means of a hinge shaft, at a position corresponding to the slot (11), wherein the clamping member (2) is provided with a first clamping portion (21), the tongue body (1) is further provided with a second clamping portion (13) extending outwards from the tongue body (1), and when the strap component (4) passes through the slot (11), the strap component (4) is located between the first clamping portion (21) and the second clamping portion (13); and an elastic element (3) which is arranged in association with the clamping member (2) and applies an elastic force to the clamping member (2) to maintain the clamping member (2) in a release position, in which a gap is formed 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, the clamping member (2) rotates around the hinge shaft thereof from the release position to a clamping station, in which the first clamping portion (21) and the second clamping portion (13) clamp the strap component (4).

Description

Safety belt locking device and safety belt assembly TECHNICAL FIELD

[0001] The present invention relates to a safety belt device, in particular to a locking device. BACKGROUND

[0002] Safety belts are common safety accessories on vehicles, such as cars.

[0003] A common safety belt structure is a nylon belt passing through a slot of a lock tongue installed on a seat, and a user inserts the lock tongue into a lock seat provided on the seat when riding a vehicle, so that the safety belt is restrained on the user's body.

[0004] For the current common safety belt lock tongue, the safety belt only passes through the slot of the lock tongue without clamping function. Therefore, when a collision occurs, the safety belt will still slip between the user's waist and chest, thereby failing to prevent the user from further moving forward.

[0005] SUMMARY

[0006] One of the purposes of the present invention is to provide a safety belt locking device which can lock the sliding of the safety belt when a collision occurs, thereby restraining the forward movement distance of the human hip, allowing the waist belt to share the impact kinetic energy of the lower body, and allowing the shoulder belt to only bear the kinetic energy of the chest, thereby further ensuring the safety of the user.

[0007] In order to achieve the above purpose, the present invention provides a safety belt locking device, which comprises a lock tongue body having a hollow slot for passing a belt member, and further comprising:

[0008] The safety belt locking device further comprises a clamping member hinged to the lock tongue body at a position corresponding to the slot via a hinge shaft, and the clamping member has a first clamping portion;

[0009] The lock tongue body further has a second clamping portion extending outward from the lock tongue body, and when the belt member is passed through the slot, it is located between the first clamping portion and the second clamping portion;

[0010] 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 which the first clamping portion and the second clamping portion have a gap therebetween;

[0011] When the clamping member is subjected to an external force resisting the elastic force, it rotates around the hinge shaft to rotate from the release position to a clamping position, in which the first clamping portion and the second clamping portion clamp the belt member.

[0012] Further, in some embodiments of the present application, the clamping member is configured as a U-shape, comprising the first clamping portion and arms extending from both axial ends of the first clamping portion.

[0013] Further, in some embodiments of the present application, the hinge shaft is configured as two short pin shafts respectively connected with the two arms.

[0014] Further, in some embodiments of the present application, the elastic element is configured as a torsion spring.

[0015] Further, in some embodiments of the present application, the first clamping portion has a runway-shaped cross section.

[0016] Further, in some embodiments of the present application, the second clamping portion has an extension length in the length direction corresponding to the axial extension length of the first clamping portion.

[0017] Further, in some embodiments of the present application, the second clamping portion has an arc-shaped cross section.

[0018] Further, in some embodiments of the present application, the geometric axis of the hinge shaft and the first clamping portion are respectively located on both sides of the belt member.

[0019] Another object of the present application is to provide a seat belt assembly which can lock the sliding of the seat belt when a collision occurs, thereby limiting the forward movement distance of the hips of the occupant, allowing the seat belt to share the impact kinetic energy of the lower body, and allowing the shoulder belt to only bear the kinetic energy of the chest, thereby effectively ensuring the safety of the occupant.

[0020] Based on the above-mentioned objects, the present application further provides a seat belt assembly comprising a belt member and a seat belt locking device as described above, wherein the belt member is arranged in the slot and wrapped around the first clamping portion between the first clamping portion and the second clamping portion, wherein in the release position, the belt member can freely move between the gaps, and in the clamping position, the belt member is clamped between the first clamping portion and the second clamping portion.

[0021] The seat belt locking device of the present application, through the first clamping portion and the second clamping portion, allows the first clamping portion to rotate to the clamping position and press the seat belt when the tensioning force of the belt member exceeds the elastic critical value of the elastic element, thereby locking the sliding of the seat belt when a collision occurs, limiting the forward movement distance of the hips of the occupant, allowing the seat belt to share the impact kinetic energy of the lower body, and allowing the shoulder belt to only bear the kinetic energy of the chest, thereby reducing the pressure of the chest belt on the chest cavity and reducing the damage to the chest.

[0022] The safety belt assembly also has the above-mentioned advantages. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 shows a perspective view of the safety belt locking device according to the present application in one embodiment from one viewing angle.

[0024] Fig. 2 shows a perspective view of the safety belt locking device according to the present application in one embodiment from another viewing angle.

[0025] Fig. 3 shows a perspective view of the safety belt assembly according to the present application in one embodiment.

[0026] Fig. 4 shows a front view of the safety belt assembly according to the present application in one embodiment.

[0027] Fig. 5 shows the present application in one embodiment in a released position in a cross-sectional view.

[0028] Fig. 6 shows the present application in one embodiment in a clamped position in a cross-sectional view.

[0029] Fig. 7 shows a perspective view of the clamping element of the safety belt locking device or the safety belt assembly according to the present application in one embodiment. DETAILED DESCRIPTION

[0030] The safety belt locking device and the safety belt assembly according to the present application will be further explained and described below in connection with the drawings and specific embodiments, however, the explanation and description shall not constitute an undue limitation of the technical solution of the present application.

[0031] A common safety belt structure is a nylon belt passing through a slot of a lock tongue mounted on a seat, and a passenger inserts the lock tongue into a lock seat provided on the seat when riding a vehicle, so as to buckle the safety belt on the body. However, for the current safety belt lock tongue, the safety belt only passes through the slot of the lock tongue, and has no clamping function. Therefore, when a collision occurs, the safety belt will still slide between the waist and the chest of the passenger, so as to fail to prevent the passenger from moving forward.

[0032] In view of the above technical problems, the present application provides a safety belt locking device in one embodiment.

[0033] Fig. 1 shows a perspective view of the safety belt locking device according to the present application in one embodiment from one viewing angle (front view).

[0034] Fig. 2 shows a perspective view of the safety belt locking device according to the present application in one embodiment from another viewing angle (back view).

[0035] As shown in Figs. 1 and 2, in some embodiments, the safety belt locking device comprises a locking tongue body 1, a clamping member 2 and an elastic element 3.

[0036] The locking tongue body has a hollow groove 11 and a clasp 12, the groove 11 is used for passing the belt member, and the clasp 12 is used for being inserted into a locking seat on the seat, so as to buckle the safety belt on the passenger. In addition, the locking tongue body 1 also has a second clamping part 13 which extends outward from the locking tongue body 1.

[0037] The clamping member 2 is hinged with the locking tongue body 1 at the position corresponding to the groove, and has a first clamping part 21 which is located between the first clamping part 21 and the second clamping part 13 when the belt member is passed in the groove.

[0038] The elastic element 3 is arranged in association with the clamping member 2, and applies an elastic force to the clamping member 2, so as to keep the clamping member 2 in a release position in which the first clamping part 21 and the second clamping part 13 have a gap therebetween. 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 which the first clamping part 21 and the second clamping part 13 clamp the belt member.

[0039] In another embodiment, the present application also provides a safety belt assembly which comprises a belt member 4 and the safety belt locking device as described above.

[0040] Fig. 3 shows a perspective structural schematic diagram of the safety belt assembly in an embodiment of the present application.

[0041] Fig. 4 shows a front view of the safety belt assembly in an embodiment of the present application.

[0042] As shown in Figs. 3 and 4, the belt member 4 is passed in the groove of the locking tongue body, and passes between the first clamping part 21 and the second clamping part 13, and is wrapped on the first clamping part 21 in a U shape.

[0043] As shown in Fig. 5, when the clamping member is in the release position, the belt member 4 can freely move in the gap between the first clamping part 21 and the second clamping part 13.

[0044] When the collision occurs, the belt member 4 is tightened, at this time, the belt member 4 applies a force to the clamping member 2 through friction to make it rotate in the counterclockwise direction around the hinge shaft, so that the first clamping part 21 approaches the second clamping part until reaching the clamping position as shown in Figure 6, at which the belt member 4 is clamped between the first clamping part 21 and the second clamping part 13. Thus, the sliding of the belt member is locked when the collision occurs, thereby limiting the forward movement distance of the passenger's hips, allowing the lower body impact kinetic energy to be shared by the waist belt, and allowing the shoulder belt to only bear the kinetic energy of the chest, thereby reducing the pressure of the chest belt on the chest cavity and reducing the damage to the chest.

[0045] Figure 7 shows a perspective view of the clamping member of the safety belt locking device or safety belt assembly according to the present application in an embodiment.

[0046] As shown in Figure 7, in some embodiments of the present application, the clamping member 2 is configured as a U-shaped structure, which includes a first clamping part 21 extending in the axial direction of the hinge shaft and arms 22 extending from both axial ends of the first clamping part. In this arrangement, the first clamping part 21 is spaced apart from the hinge shaft, so that the first clamping part 21 can approach the second clamping part as the clamping member rotates around the hinge shaft, thereby achieving the switching from the release position to the clamping position.

[0047] As shown in Figures 1 and 3, in some embodiments of the present application, the geometric axis P of the hinge shaft and the first clamping part 21 are located on both sides of the belt member 4.

[0048] With this arrangement, when the belt member 4 is subjected to a tightening force, it will not move along the axial direction by contacting the hinge shaft on the left side of Figure 3, but will be tightly wrapped around the first clamping part 21, thereby effectively preventing the edge of the belt member from being caught and the edge from being torn, thereby greatly improving the safe service life of the safety belt.

[0049] As shown in Figures 1 and 7, in some more specific embodiments of the present application, the hinge shaft can be configured as two short pin shafts 5 connected to the two arms 22 of the clamping member 2 respectively.

[0050] Of course, in other embodiments, the hinge shaft can also be configured as a long shaft, the two ends of which are connected to the arms of the clamping member respectively.

[0051] However, compared to the arrangement of the hinge shaft as a long shaft, which is also spaced apart from the first clamping part 21 on both sides of the belt member 4. In some more specific embodiments, in order not to interfere with the second clamping part, it can be arranged outside the second clamping part, in which 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 part.

[0052] In some more specific embodiments of the present application, the short pin shaft 5 can be fixedly connected with the arm through interference fit, and the short pin shaft can be arranged in the hole of the flange 14 of the latch body through clearance fit and can rotate in the hole.

[0053] In some more specific embodiments of the present application, the elastic element 3 can be configured as a torsion spring. One leg of the torsion spring can abut against the latch body, and the other leg of the torsion spring can abut against the hinge shaft or the clamping member.

[0054] In some more specific embodiments of the present application, the elastic element 3 can also be configured as an elastic band or the like which applies torsion to the clamping member.

[0055] As shown in FIGS. 5 and 6, in some embodiments of the present application, the cross section of the first clamping portion 21 can be runway-shaped.

[0056] As shown in FIG. 1, in some more specific embodiments of the present application, the extension length of the second clamping portion 13 in the length direction corresponds to the axial extension length of the first clamping portion. This arrangement can make the present application have a larger clamping contact area, thereby further improving the clamping effect.

[0057] Of course, in 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.

[0058] As shown in FIGS. 1, 5 and 6, in some more specific embodiments of the present application, the cross section of the second clamping portion 13 is arc-shaped.

[0059] Of course, in other more specific embodiments, the cross section of the second clamping portion 13 can also be L-shaped.

[0060] It should be noted that the "upper", "lower", "left", "right", "counterclockwise" described herein are for the convenience of understanding and are exemplary descriptions based on the arrangement and direction of FIGS. 1 to 7, and do not limit the present application.

[0061] It should be noted that the prior art part in the protection scope of the present application is not limited to the embodiments given in the present application file, and all prior art which does not contradict the scheme of the present application, including but not limited to prior patent documents, prior published publications, prior public uses, etc., can be included in the protection scope of the present application.

[0062] In addition, the combination manners of the technical features in the present application are not limited to the combination manners described in the claims of the present application or the combination manners described in the specific embodiments, and all the technical features described in the present application can be freely combined or integrated in any manner, unless contradictory to each other.

[0063] It should also be noted that the above-mentioned embodiments are only specific embodiments of the present application. Obviously, the present application is not limited to the above-mentioned embodiments, and similar changes or modifications made on the basis of the disclosure of the present application are directly derived or easily thought by those skilled in the art, and should all belong to the protection scope of the present application.

Claims

1. A seat belt locking device comprising a latch body having a slotted opening for a belt member to pass through, characterized in that: the seat belt locking device further comprises a clamp member hingedly connected to the latch body at a hinge axis corresponding to the slotted opening, the clamp member having a first clamping portion; the latch body further has a second clamping portion extending outwardly from the latch body, the second clamping portion being located between the first clamping portion and the belt member when the belt member is passed through the slotted opening; a resilient member is associated with the clamp member to apply a resilient force to the clamp member to maintain the clamp member in a release position in which the first clamping portion and the second clamping portion have a gap therebetween; wherein when the clamp member is subjected to an external force against the resilient force, the clamp member rotates about the hinge axis to rotate from the release position to a clamping position in which the first clamping portion and the second clamping portion clamp the belt member. The geometric axis of the hinge axis and the first clamping portion are located on opposite sides of the belt member, respectively. The clamp member is configured in a U-shape comprising the first clamping portion and two arms extending from two axial ends of the first clamping portion, respectively. The hinge axis is configured as two short pin shafts connected to the two arms, respectively. The resilient member is configured as a torsion spring.

2. The belt locking device according to claim 1, wherein The first clamping portion has a runway-shaped cross section.

3. The belt lock apparatus of claim 1, wherein The second clamping portion has an axial extension corresponding to the axial extension of the first clamping portion.

4. The belt lock device of claim 3, wherein The second clamping portion has an arc-shaped cross section.

5. The belt lock apparatus of claim 1, wherein Further comprising the seat belt locking device according to any one of claims 1-8, wherein the belt member is passed through the slotted opening and wrapped around the first clamping portion between the first clamping portion and the second clamping portion, wherein in the release position, the belt member is free to move in the gap, and in the clamping position, the belt member is clamped between the first clamping portion and the second clamping portion.

6. The belt lock apparatus of claim 1, wherein ​ 7. The belt lock apparatus of claim 1, wherein ​ 8. The belt lock apparatus of claim 1, wherein, ​ 9. A seat belt assembly comprising a belt member, characterised in that, ​

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