Lock tongue assembly of safety belt and safety belt assembly

Abstract

The utility model relates to the technical field of safety belts, and provides a spring bolt assembly of a safety belt and a safety belt assembly. The spring bolt assembly of the safety belt comprises a spring bolt provided with a first notch and a supporting plate protruding relative to the first notch; the cam part is movably contained in the cavity of the spring bolt and located at the first notch; the elastic piece is contained in the cavity of the spring bolt and elastically abuts against the cam piece; the cam part can rotate to abut against the supporting plate and can be pushed by the elastic part to reset so as to loosen the supporting plate. According to the safety belt locking device, dynamic locking of the safety belt can be achieved through matching of the spring bolt, the cam piece and the elastic piece, the situation that the safety of passengers is threatened due to the fact that the shoulder belt part / the waist belt part of the safety belt is uncontrollably pulled when a vehicle collides is avoided, and stress of the waist belt part can be adjusted under the normal driving working condition so that the safety belt can meet the use requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of safety belts, in particular to a safety belt locking tongue assembly and a safety belt assembly. Background Art

[0002] Seat belts are important safety equipment in vehicles. They can secure passengers in their seats when the vehicle collides, reducing casualties. The problems with current seat belts are:

[0003] Some safety belts are designed to separate the shoulder belt and the waist belt through a locking tongue, which will make it impossible to adjust the tightness of the waist belt, and thus make the safety belt unable to meet the use requirements;

[0004] Some seat belts are designed to slide in the groove of the locking tongue member, which may cause the shoulder belt portion / lap belt portion to be pulled uncontrollably when the vehicle collides, threatening the safety of the occupants. Usually, the shoulder belt portion is pulled by the lap belt portion, causing the force of the shoulder belt portion to increase uncontrollably, thereby causing severe compression on the occupant's chest.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0006] In view of this, the utility model provides a seat belt tongue assembly and a seat belt assembly, which can realize dynamic locking of the seat belt to prevent the shoulder belt portion / waist belt portion of the seat belt from being pulled uncontrollably when the vehicle collides and threaten the safety of the occupants, and can adjust the force of the waist belt portion under normal driving conditions so that the seat belt meets the usage requirements.

[0007] One aspect of the utility model provides a safety belt lock tongue assembly, comprising: a lock tongue, provided with a first notch and a support plate raised relative to the first notch; a cam member, movably accommodated in a cavity of the lock tongue and located at the first notch; an elastic member, accommodated in the cavity of the lock tongue and elastically abutting against the cam member; wherein the cam member can rotate to abut against the support plate, and can be reset under the push of the elastic member to release the support plate.

[0008] In some embodiments, the cam member includes a U-shaped portion, the arc surface of the U-shaped portion cooperates with the support plate, and the bottom surface of the U-shaped portion cooperates with the elastic member and the end edge of the first notch.

[0009] In some embodiments, a rivet structure is provided on the bottom surface of the U-shaped portion, and one end of the elastic member is connected to the rivet structure.

[0010] In some embodiments, a limiting rib is provided on the inner wall of the cavity of the locking tongue, and the other end of the elastic member abuts against the limiting rib.

[0011] In some embodiments, a wedge-shaped groove is provided on the bottom surface of the U-shaped portion, and the wedge-shaped groove abuts against an end edge of the first notch.

[0012] In some embodiments, the arc surface of the U-shaped portion is provided with anti-slip grooves distributed at intervals.

[0013] In some embodiments, legs are provided on both sides of the cam member, and the legs abut against the side walls of the cavity of the locking tongue.

[0014] In some embodiments, the ends of the legs and the side walls of the cavity of the locking tongue are both formed into arc-shaped structures.

[0015] In some embodiments, the locking tongue is integrally formed from a metal piece.

[0016] In some embodiments, the lock tongue assembly also includes: a first cover body, which is provided with a slot and a second notch, the lock tongue is inserted into the first cover body, the tongue portion of the lock tongue passes through the slot, and the position of the second notch corresponds to the position of the first notch; a second cover body, which is buckled with the lock tongue and the first cover body.

[0017] In some embodiments, the side wall of the lock tongue is provided with a groove structure and a hole structure, the side wall of the first cover body is provided with a first buckle, and the side wall of the second cover body is provided with a second buckle; the first buckle is buckled with the groove structure, and the second buckle is buckled with the hole structure.

[0018] In some embodiments, the inner wall of the first cover body is provided with a positioning rib, and the locking tongue is inserted into the first cover body along the positioning rib.

[0019] In some embodiments, a protrusion is disposed on the inner wall of the second cover body, and the protrusion abuts against the surface of the locking tongue.

[0020] Another aspect of the utility model provides a seat belt assembly, comprising: a seat belt; a locking tongue assembly as described in any of the above embodiments, wherein the seat belt passes through the first slot and is wrapped around the cam member; the cam member can be rotated to press against the support plate under the pull of the seat belt to lock the seat belt; the cam member can be rotated to leave the support plate under the push of the elastic member to loosen the seat belt.

[0021] Compared with the prior art, the beneficial effects of the present invention include at least:

[0022] The lock tongue assembly of the utility model realizes dynamic locking of the safety belt through the cooperation of the lock tongue, the cam member and the elastic member: the first notch of the lock tongue is for the safety belt to pass through, and the cam member is for the safety belt to be wound around; the cam member can rotate to abut against the support plate under the action of a specific force, corresponding to the actual working condition, for example, when the waist belt portion of the safety belt pulls the shoulder belt portion, the cam member is pulled by the safety belt to rotate to abut against the support plate, at this time, the cam member presses the safety belt against the support plate to lock the safety belt, which can prevent the shoulder belt portion / waist belt portion of the safety belt from being pulled uncontrollably and threatening the safety of the occupant, especially preventing the shoulder belt portion from being pulled by the waist belt portion and compressing the chest of the occupant; in other cases, that is, when there is no specific force to drive the cam member to rotate to abut against the support plate, the cam member can be reset under the push of the elastic member to loosen the support plate, and at this time the safety belt is in a relaxed state that can slide in the notch of the lock tongue, so as to adjust the force of the shoulder belt portion and the waist belt portion, for example, by loosening the shoulder belt portion to adjust the force of the waist belt portion, so that the safety belt meets the use requirements.

[0023] The seat belt assembly equipped with the locking tongue assembly of the utility model can meet the scoring standard of C-NCAP (China New Car Assessment Program), so that the vehicle has excellent safety performance.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present utility model, and together with the specification, are used to explain the principles of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 and Figure 2 The exploded structural schematic diagram of the lock tongue assembly in the embodiment of the utility model is shown;

[0027] Figure 3 A schematic diagram showing the structure of the locking tongue assembly in the embodiment of the utility model for releasing the safety belt;

[0028] Figure 4 A schematic diagram showing the structure of a locking tongue assembly for locking a safety belt in an embodiment of the utility model is shown;

[0029] Figure 5 A schematic structural diagram of a cam member of a locking tongue assembly in an embodiment of the utility model is shown;

[0030] Figure 6A schematic structural diagram showing the assembly of a cam member and an elastic member of a lock tongue assembly in an embodiment of the present utility model;

[0031] Figure 7 A schematic diagram showing the structure of the cam member of the locking tongue assembly and the safety belt in cooperation with each other in the embodiment of the utility model;

[0032] Figure 8 A schematic structural diagram showing a first cover body of a locking tongue assembly in an embodiment of the utility model;

[0033] Fig. 9 A schematic structural diagram showing a second cover body of a lock tongue assembly in an embodiment of the utility model;

[0034] Fig.10 A schematic structural diagram of a lock tongue of a lock tongue assembly in an embodiment of the utility model is shown;

[0035] Fig.11 A schematic structural diagram showing the matching of the lock tongue of the lock tongue assembly with the first cover body and the second cover body in an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0036] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Instead, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0037] The words "first", "second" and similar words used in the specific description do not indicate any order, quantity or importance, but are only used to distinguish different components. The term "plurality" means two or more, unless otherwise clearly and specifically defined. In addition, in the description of the present utility model, when it is said that a device is "connected" to another device, this includes not only the case of direct connection, but also the case of indirect connection through other elements.

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in different embodiments may be combined with each other.

[0039] Figure 1 and Figure 2 The exploded structure of the bolt assembly is shown. Figure 3 It shows the structure of the tongue assembly to release the seat belt. Figure 4 The structure of the lock tongue assembly for locking the seat belt is shown; Figures 1 to 4 As shown, the lock tongue assembly of the safety belt provided by the embodiment of the utility model includes:

[0040] The locking tongue 10 is provided with a first notch 11 and a support plate 12 protruding relative to the first notch 11;

[0041] The cam member 20 is movably accommodated in the cavity of the locking tongue 10 and located at the first notch 11;

[0042] An elastic member 30 is accommodated in the cavity of the locking tongue 10 and elastically abuts against the cam member 20;

[0043] The cam member 20 can rotate to abut against the support plate 12 (eg Figure 4 As shown), and can be reset under the push of the elastic member 30 to release the branch plate 12 (as shown Figure 3 shown).

[0044] The lock tongue assembly of the utility model realizes dynamic locking of the safety belt 80 through the cooperation of the lock tongue 10, the cam member 20 and the elastic member 30: the first notch 11 of the lock tongue 10 is for the safety belt 80 to pass through, and the cam member 20 is for the safety belt 80 to be attached and wound around; the cam member 20 can rotate to abut against the support plate 12 under the action of a specific force, corresponding to the actual working condition, for example, when the waist belt portion 82 of the safety belt 80 pulls the shoulder belt portion 83 (the direction of the specific force can be referred to Figure 4 The cam member 20 is pulled by the safety belt 80 to rotate to press against the support plate 12. At this time, the cam member 20 presses the safety belt 80 against the support plate 12 to lock the safety belt 80, which can prevent the shoulder belt portion 83 / the waist belt portion 82 of the safety belt 80 from being pulled uncontrollably and threatening the safety of the occupant, especially preventing the shoulder belt portion 83 from being pulled by the waist belt portion 82 and compressing the chest of the occupant; in addition, the safety belt 80 will not slide after being locked, which can ensure the restraint effect on the occupant; in other cases, that is, when there is no specific force driving the cam member 20 to rotate to press against the support plate 12, the cam member 20 can be reset under the push of the elastic member 30 to release the support plate 12 (the reset direction of the elastic member 30 can be referred to Figure 3 The safety belt 80 is in a relaxed state and can slide in the groove of the locking tongue 10, so as to adjust the stress of the shoulder belt portion 83 and the waist belt portion 82, for example, by loosening the shoulder belt portion 83 to adjust the stress of the waist belt portion 82, so that the safety belt 80 meets the use requirements.

[0045] If the existing seat belts want to achieve the locking and resetting functions, they usually need to cooperate with multiple structural components such as locking springs, locking members, and resetting springs, which not only has many parts, but also has a complicated assembly process. The seat belt lock tongue assembly of the utility model can achieve locking and resetting through the cooperation of the cam member 20 and the elastic member 30, which can simplify the parts; and the elastic member 30 and the cam member 20 can be pre-assembled, so that the installation of the seat belt lock tongue assembly can be completed automatically, and the operation is simple.

[0046] Figure 5The structure of the cam is shown schematically. Figure 6 The structure of the cam member and the elastic member is shown; Figures 1 to 6 As shown, in some embodiments, the cam member 20 includes a U-shaped portion 22 , the arc surface of the U-shaped portion 22 matches with the support plate 12 , and the bottom surface of the U-shaped portion 22 matches with the elastic member 30 and the end edge 111 of the first notch 11 .

[0047] The arc surface of the U-shaped portion 22 cooperates with the support plate 12, so that the locking process and the tension adjustment process of the safety belt 80 are smooth and stable; the bottom surface of the U-shaped portion 22 cooperates with the elastic member 30, so that the U-shaped portion 22 compresses the elastic member 30 when locking the safety belt 80, and can be reset under the action of the elastic member 30. In addition, the bottom surface of the U-shaped portion 22 also cooperates with the end edge 111 of the first notch 11, so that the bottom surface of the U-shaped portion 22 always abuts against the end edge 111 of the first notch 11 during the rotation process to maintain stability.

[0048] In some embodiments, a rivet structure 221 is provided on the bottom surface of the U-shaped portion 22, and one end of the elastic member 30 is connected to the rivet structure 221. In this way, the installation of the elastic member 30 and the cam member 20 is facilitated, so that the elastic member 30 and the cam member 20 can be pre-assembled to realize the automatic installation of the bolt assembly.

[0049] The elastic member 30 may be a spring sheet or other suitable elastic components. A plurality of rivet structures 221 may be provided to achieve a stable connection between the elastic member 30 and the U-shaped portion 22. The elastic member 30 and the U-shaped portion 22 may also be connected via other suitable connection structures.

[0050] In some embodiments, the inner wall of the locking tongue 10 is provided with a limiting rib 13, and the other end of the elastic member 30 abuts against the limiting rib 13. Thus, when the cam member 20 is acted upon by a specific force in the R1 direction, the cam member 20 rotates to lock the safety belt 80, and the elastic member 30 is compressed to store energy; as the specific force in the R1 direction decreases, the elastic member 30 pushes the cam member 20 to return to its original position in the R2 direction.

[0051] In some embodiments, a wedge-shaped groove 222 is disposed on the bottom surface of the U-shaped portion 22 , and the wedge-shaped groove 222 abuts against the end edge 111 of the first notch 11 .

[0052] Ideally, under the pulling of the safety belt 80 / the pushing of the elastic member 30, the U-shaped portion 22 rotates slightly to switch the locking / relaxing state of the safety belt 80. The wedge-shaped groove 222 abuts against the end edge 111 of the first notch 11, which can limit the rotation of the U-shaped portion 22 and prevent the U-shaped portion 22 from rotating out in extreme cases.

[0053] Figure 7 The structure of the cam member and the safety belt is shown; Figures 1 to 7As shown, in some embodiments, the arc surface of the U-shaped portion 22 is provided with spaced anti-skid grooves 223. The anti-skid grooves 223 can prevent the safety belt 80 from sliding sideways, thereby preventing the safety belt 80 from slipping when the vehicle collides, so as to enhance reliability.

[0054] Further, in some embodiments, legs 24 are provided on both sides of the cam member 20, and the legs 24 abut against the cavity side wall 10b of the lock tongue 10. The legs 24 are provided on both sides of the U-shaped portion 22; under the action of the elastic member 30, the legs 24 always abut against the cavity side wall 10b of the lock tongue 10, so that the movement of the cam member 20 is stable and reliable.

[0055] In some embodiments, the end of the leg 24 and the cavity side wall 10b of the lock tongue 10 are both formed into an arc structure. In this way, the movement of the cam member 20 is smooth and stable. In addition, the cavity side wall 10b of the lock tongue 10 is formed into an arc structure, which can increase the thickness of the lock tongue 10. The thickness of the lock tongue 10 can be increased to 6mm to enhance the strength of the lock tongue 10.

[0056] In the above embodiments, the locking tongue 10 can be integrally formed of a metal member.

[0057] In the current design of seat belts, the lock tongue is usually processed by plastic coating to form the lock tongue parts. The lock tongue needs to be mechanically shaped during the stamping process and needs to withstand high temperature heat treatment during the plastic coating process. The more complex the heat treatment, the more serious the deformation, and the higher the precision requirements for the mold, the more likely it is to cause scrap.

[0058] The utility model forms a high-strength lock tongue 10 by integrally forming metal parts, which not only simplifies the production process of the lock tongue 10 but also ensures the strength of the lock tongue 10 .

[0059] Figure 8 The structure of the first cover of the lock tongue assembly is shown in FIG. Fig. 9 The structure of the second cover of the lock tongue assembly is shown in FIG. Fig.10 The structure of the lock tongue of the lock tongue assembly is shown. Fig.11 The structure of the lock tongue matching with the first cover body and the second cover body is shown; Figures 1 to 11 As shown, in some embodiments, the bolt assembly further includes:

[0060] The first cover body 50 is provided with a slot 51 and a second slot 52. The lock tongue 10 is inserted into the first cover body 50, and the tongue portion 16 of the lock tongue 10 passes through the slot 51. The position of the second slot 52 corresponds to the position of the first slot 11.

[0061] The second cover body 60 is buckled with the locking tongue 10 and the first cover body 50 .

[0062] The first cover 50 and the second cover 60 can be plastic parts, separated from the metal lock tongue 10, which can reduce the requirements for manufacturing process and dimensional accuracy. During assembly, the cam member 20 can be riveted with the elastic member 30, inserted into the cavity of the lock tongue 10, and then the lock tongue 10 can be inserted into the first cover 50, and then the second cover 60 can be fastened to complete the assembly of the lock tongue assembly. The entire assembly process is simple and convenient, and is suitable for automated production lines. The assembled lock tongue assembly has a stable and reliable structure and can realize dynamic locking of the safety belt 80; wherein, the safety belt 80 can pass through the first notch 11 of the lock tongue 10, be wrapped around the cam member 20, and pass through the second notch 52 of the first cover 50.

[0063] In some embodiments, the side wall of the locking tongue 10 is provided with a groove structure 17 and a hole structure 18, the side wall of the first cover body 50 is provided with a first buckle 56, and the side wall of the second cover body 60 is provided with a second buckle 62; the first buckle 56 is buckled with the groove structure 17, and the second buckle 62 is buckled with the hole structure 18.

[0064] In this way, the locking tongue 10 , the first cover body 50 and the second cover body 60 are stably buckled together.

[0065] In some embodiments, the inner wall of the first cover body 50 is provided with a positioning rib 55 , and the locking tongue 10 is inserted into the first cover body 50 along the positioning rib 55 .

[0066] The positioning rib 55 plays a positioning role in the operation of inserting the locking tongue 10 into the first cover body 50, so as to ensure that the two are assembled accurately.

[0067] In some embodiments, a protrusion 66 is disposed on the inner wall of the second cover 60 , and the protrusion 66 abuts against the surface of the locking tongue 10 .

[0068] The protrusion 66 can be embedded in the groove of the limiting rib 13 to achieve a stable assembly of the second cover body 60 and the locking tongue 10 .

[0069] The utility model also provides a safety belt assembly, which can be combined with the above Figures 1 to 11 As shown, the seat belt assembly includes: a seat belt 80; and a locking tongue assembly, wherein the seat belt 80 passes through the first notch 11, is attached to the cam member 20, and passes out from the second notch 52.

[0070] The cam member 20 can rotate to abut against the support plate 12 under the pull of the safety belt 80 to lock the safety belt 80. Figure 4As shown, when the waist belt portion 82 of the safety belt 80 pulls the shoulder belt portion 83, the cam member 20 is pulled by the safety belt 80 to rotate to press against the support plate 12. At this time, the cam member 20 presses the safety belt 80 against the support plate 12 to lock the safety belt 80, which can prevent the shoulder belt portion 83 / waist belt portion 82 of the safety belt 80 from being pulled uncontrollably and threatening the safety of the occupant, especially preventing the shoulder belt portion 83 from being pulled by the waist belt portion 82 and compressing the chest of the occupant; in addition, the safety belt 80 will not slide after being locked, which can ensure the restraint effect on the occupant.

[0071] The cam member 20 can be pushed by the elastic member 30 to rotate away from the support plate 12 to loosen the seat belt 80. Figure 3 and Figure 4 As shown, when the safety belt 80 does not pull the cam member 20 in the R1 direction, the cam member 20 can be reset in the R2 direction under the push of the elastic member 30 to loosen the branch plate 12. At this time, the safety belt 80 is in a relaxed state and can slide in the grooves of the locking tongue 10 and the first cover body 50, so as to adjust the force of the shoulder belt part 83 and the waist belt part 82, for example, by loosening the shoulder belt part 83 to adjust the force of the waist belt part 82, so that the safety belt 80 meets the use requirements.

[0072] Thus, through the cooperation of the locking tongue 10, the cam member 20 and the elastic member 30, dynamic locking of the seat belt 80 is achieved, so that the seat belt assembly equipped with the locking tongue assembly of the utility model can meet the scoring standards of C-NCAP (China New Car Assessment Program), so that the vehicle has excellent safety performance.

[0073] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A safety belt tongue assembly, characterized in that: include: The locking tongue is provided with a first notch and a support plate raised relative to the first notch; A cam member, movably received in the cavity of the locking tongue and located at the first notch; An elastic member, accommodated in the cavity of the locking tongue and elastically abutting against the cam member; The cam member can be rotated to abut against the support plate, and can be reset under the push of the elastic member to release the support plate.

2. The bolt assembly according to claim 1, characterized in that: The cam member comprises a U-shaped portion, the arc surface of the U-shaped portion matches with the support plate, and the bottom surface of the U-shaped portion matches with the elastic member and the end edge of the first notch.

3. The bolt assembly according to claim 2, characterized in that: A rivet structure is provided on the bottom surface of the U-shaped portion, and one end of the elastic member is connected to the rivet structure.

4. The bolt assembly according to claim 3, characterized in that: The inner wall of the cavity of the lock tongue is provided with a limiting rib, and the other end of the elastic member abuts against the limiting rib.

5. The bolt assembly according to claim 2, characterized in that: A wedge-shaped groove is provided on the bottom surface of the U-shaped portion, and the wedge-shaped groove abuts against the end edge of the first notch.

6. The bolt assembly according to claim 2, characterized in that: The arc surface of the U-shaped portion is provided with anti-slip grooves distributed at intervals.

7. The bolt assembly according to claim 1, characterized in that: Support legs are arranged on both sides of the cam member, and the support legs abut against the side walls of the cavity of the locking tongue.

8. The bolt assembly according to claim 7, characterized in that: The ends of the legs and the side walls of the cavity of the locking tongue are both formed into arc-shaped structures.

9. The bolt assembly according to claim 1, characterized in that: The locking tongue is integrally formed of a metal piece.

10. The bolt assembly according to any one of claims 1 to 9, characterized in that: Also includes: A first cover body is provided with a slot and a second notch, the locking tongue is inserted into the first cover body, the tongue portion of the locking tongue passes through the slot, and the position of the second notch corresponds to the position of the first notch; The second cover body is buckled with the locking tongue and the first cover body.

11. The bolt assembly according to claim 10, characterized in that: The side wall of the lock tongue is provided with a groove structure and a hole structure, the side wall of the first cover body is provided with a first buckle, and the side wall of the second cover body is provided with a second buckle; The first buckle is buckled with the slot structure, and the second buckle is buckled with the hole structure.

12. The bolt assembly according to claim 10, characterized in that: The inner wall of the first cover body is provided with a positioning rib, and the locking tongue is inserted into the first cover body along the positioning rib.

13. The bolt assembly according to claim 10, characterized in that: The inner wall of the second cover body is provided with a protrusion, and the protrusion abuts against the surface of the locking tongue.

14. A seat belt assembly, characterized in that: include: seat belt; The locking tongue assembly according to any one of claims 1 to 13, wherein the safety belt passes through the first notch and is wrapped around the cam member; The cam member can be rotated to abut against the support plate under the pulling of the safety belt to lock the safety belt; The cam member can be rotated to leave the support plate under the push of the elastic member to loosen the safety belt.

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