Seat belt self-locking tongue

Abstract

The present disclosure discloses a self-locking tongue for a safety belt, comprising: a tongue body, the tongue body having a horizontal opening through which a safety belt webbing passes; a swivel, the swivel is supported near the horizontal opening of the tongue body and can rotate between an initial position and a locking position, the swivel has a through hole located inside the swivel, the through hole only opens from the left and right surfaces of the swivel; and a reset member, the reset member is arranged in the through hole of the swivel and is configured to bias the swivel to the initial position. The self-locking tongue for a safety belt can realize the locking function of the safety belt webbing.

Description

Technical Field

[0001] The present disclosure relates to the field of automobile safety, and more particularly to a self-locking tongue of a seat belt. Background Art

[0002] Currently, three-point safety belts are widely used in vehicles. A sliding lock tongue is provided on the webbing of the three-point safety belt. When wearing the safety belt, the passenger inserts the lock tongue into the latch to restrain the passenger on the vehicle seat. The lock tongue divides the webbing into a shoulder belt section for limiting the forward movement of the passenger's upper body and a waist belt section for limiting the forward movement of the passenger's waist.

[0003] Ordinary seat belt lock tongues do not have the ability to lock the webbing, so the length of the shoulder and waist sections can change with the movement of the passenger's body. Under normal vehicle conditions, the webbing can be freely pulled out and reeled in from the retractor to secure the passenger in a specified position. In emergency situations such as vehicle collisions, the retractor locks the total length of the webbing due to the inertia mechanism, and the passenger's waist will be greatly displaced, the waist section of the webbing will be lengthened, resulting in a shortening of the shoulder section. The shortening of the shoulder section will compress the passenger's chest, causing damage to the passenger's chest.

[0004] At present, a safety belt lock tongue with a locking function has been developed, which limits the mutual movement between the waist belt section and the shoulder belt section by applying a locking force on the webbing, thereby reducing the damage to the passenger's chest. The lock tongue is provided with a rotating body supported by a rotating shaft, and the rotating body can be rotated from an initial position to a locking position to lock the webbing, and can be reset from the locking position to the initial position by a reset member. In the existing safety belt lock tongue, the reset member is installed in the rotating body from the front of the rotating body and covered by a side cover, or the reset member is embedded in the plastic-coated part of the lock tongue body.

[0005] However, using the rotating shaft as a support or guide for the rotating body increases the difficulty of assembling the lock tongue and the complexity of the structure. Installing the reset member into the rotating body from the front requires an additional side cover, and when the load applied to the webbing is too large, the side cover is easy to loosen from the rotating body; embedding the reset member in the overmolded part increases the difficulty of the process and reduces the stability of the part. Summary of the invention

[0006] One of the purposes of the present disclosure is to provide a seat belt self-locking tongue that can overcome at least one of the drawbacks of the prior art.

[0007] The subject technology of the present disclosure is explained according to the various aspects described below. For convenience, various examples of various aspects of the subject technology are described as numbered clauses (1, 2, 3, etc.). These clauses are provided as examples, rather than limiting the subject technology of the present disclosure.

[0008] 1. A self-locking tongue for a safety belt, wherein the self-locking tongue for a safety belt comprises:

[0009] a locking tongue body having a horizontal opening through which the seat belt webbing passes;

[0010] A rotator supported near the horizontal opening of the bolt body and rotatable between an initial position and a locked position, the rotator having a through hole inside the rotator, the through hole opening only from the left and right surfaces of the rotator; and

[0011] A reset member is disposed in the through hole of the rotating body and is configured to bias the rotating body to an initial position.

[0012] 2. A seat belt self-locking lock tongue according to clause 1, wherein a lock tongue body is provided with a left supporting portion and a right supporting portion on the left and right sides of a horizontal opening, respectively, and the left supporting portion and the right supporting portion are configured to support a rotating body.

[0013] 3. The self-locking tongue of the safety belt according to clause 1 or 2, wherein the reset member is arranged to pass through the through hole of the left supporting part, the through hole of the rotating body and the through hole of the right supporting part.

[0014] 4. The self-locking safety belt tongue according to clause 2, wherein the reset element is substantially linear and has one or more wavy portions in the center portion.

[0015] 5. The self-locking tongue for a safety belt according to clause 4, wherein the height of the wavy portion is greater than the height of the through hole of the rotating body, and the wavy portion is assembled in the through hole of the rotating body in a pre-compressed manner.

[0016] 6. A self-locking tongue for a safety belt according to clause 4, wherein one end portion of the reset member has a limiting portion, and the limiting portion is configured to cooperate with a limiting groove on one of the left supporting portion and the right supporting portion.

[0017] 7. The self-locking tongue of a safety belt according to clause 6, wherein the limiting portion is substantially hook-shaped.

[0018] 8. The self-locking tongue of a safety belt according to clause 6, wherein the limiting groove is arranged on the horizontal outer side of the through hole of the one supporting part.

[0019] 9. The self-locking tongue of the safety belt according to clause 6, wherein the wavy portion and the limiting portion of the reset member form a certain angle, and the limiting groove of the one supporting portion and the through hole of the one supporting portion form the same angle.

[0020] 10. The self-locking tongue of a safety belt according to clause 6, wherein the through hole of the one supporting portion and the through hole of the rotating body have the same shape.

[0021] 11. The self-locking tongue of a safety belt according to clause 2, wherein the rotating body is substantially C-shaped and comprises an upper curved surface, a lower curved surface, a front surface, a rear surface, and the left and right surfaces connecting the upper curved surface, the lower curved surface, the front surface and the rear surface.

[0022] 12. The self-locking tongue for a safety belt according to clause 11, wherein the through hole of the rotating body is located at a rear portion of the rotating body and is substantially waist-shaped.

[0023] 13. The seat belt self-locking tongue according to clause 12, wherein in a cross section along the front-rear direction, the curvature of the outer contour of the through hole of the body of revolution is kept substantially the same as the curvature of the upper curved surface of the body of revolution.

[0024] 14. The self-locking tongue for a safety belt according to clause 11, wherein the through hole of the rotating body is located at the front part of the rotating body and is substantially waist-shaped with a branch part at the end.

[0025] 15. The self-locking safety belt tongue according to clause 14, wherein, in a cross section along the front-rear direction, the curvature of the outer contour of the branch portion of the through hole of the rotating body is substantially the same as the upper curved surface of the rotating body.

[0026] 16. The self-locking tongue of the safety belt according to clause 11, wherein the left supporting portion and the right supporting portion are provided with arc-shaped protrusions extending inwardly in a horizontal direction, and the rotating body is supported on the arc-shaped protrusions and can rotate around the arc-shaped protrusions.

[0027] 17. The self-locking tongue of the safety belt according to clause 16, wherein the lower curved surface of the rotating body and the upper surface of the arc-shaped protrusion fit together, so that the lower curved surface of the rotating body can rotate around the upper surface of the arc-shaped protrusion between an initial position and a locking position.

[0028] 18. A self-locking safety belt tongue according to clause 16, wherein the upper curved surface of the rotating body fits the upper surface of the horizontal opening, so that when the rotating body rotates around the arc-shaped protrusion between the initial position and the locking position, the upper curved surface of the rotating body can slide along the upper surface of the horizontal opening.

[0029] 19. The self-locking safety belt tongue according to clause 18, wherein the upper surface of the horizontal opening is in an outwardly convex arc shape.

[0030] 20. The seat belt self-locking tongue according to clause 16, wherein the rotating body is configured to rotate in a channel formed by an upper surface of the horizontal opening and an upper surface of the arc-shaped protrusion.

[0031] 21. The seat belt self-locking tongue according to clause 11, wherein the rear surface of the rotator abuts against the seat belt webbing, so that the movement of the seat belt webbing can drive the rotator to rotate from the initial position to the locking position.

[0032] 22. A seat belt self-locking lock tongue according to clause 11, wherein a webbing channel for the seat belt webbing to pass through is formed between the front surface of the rotating body and the lower surface of the horizontal opening, wherein, when the rotating body is in an initial position, the front surface of the rotating body and the lower surface of the horizontal opening are spaced apart by a distance, and when the rotating body is in a locked position, the front surface of the rotating body and the lower surface of the horizontal opening clamp the seat belt webbing together.

[0033] 23. The self-locking safety belt tongue according to clause 22, wherein the front surface of the rotating body and / or the lower surface of the horizontal opening is provided with one or more teeth.

[0034] 24. The self-locking tongue of a safety belt according to clause 1 or 2, wherein the tongue body, the reset member and the rotating body are made of metal.

[0035] Other features and advantages of the subject technology of the present disclosure will be set forth in the following description, and in part will be apparent from the description, or can be learned by practicing the subject technology of the present disclosure. The advantages of the subject technology of the present disclosure will be realized and obtained through the structures particularly pointed out in the written description and its claims and the accompanying drawings.

[0036] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the subject technology of the present disclosure as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Aspects of the present disclosure will be better understood after reading the following detailed description in conjunction with the accompanying drawings, in which:

[0038] Figure 1 is an assembly perspective view of a safety belt self-locking tongue according to a first embodiment of the present disclosure;

[0039] Figure 2 is an exploded perspective view of a safety belt self-locking tongue according to a first embodiment of the present disclosure;

[0040] Figure 3 yes Figure 1 A cross-sectional view showing a seat belt self-locking tongue in an initial position;

[0041] Figure 4 yes Figure 1 A cross-sectional view showing a seat belt self-locking tongue in a locked position;

[0042] Figure 5 yes Figure 1 A partial enlarged view of the limit groove of the self-locking tongue of the safety belt is shown;

[0043] Figure 6 yes Figure 1A schematic diagram of the assembly operation of the seat belt self-locking tongue is shown;

[0044] Figure 7 is a cross-sectional view of a seat belt self-locking tongue in an initial position according to a second embodiment of the present disclosure; and

[0045] Figure 8 yes Figure 7 A cross-sectional view showing a seat belt self-locking tongue in a locked position. DETAILED DESCRIPTION

[0046] The present disclosure will be described below with reference to the accompanying drawings, wherein the accompanying drawings illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in a variety of different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0047] It should be understood that the same reference numerals represent the same elements throughout the drawings. In the drawings, the dimensions of certain features may be distorted for clarity.

[0048] It should be understood that the terms used in the specification are only used to describe specific embodiments and are not intended to limit the present disclosure. All terms (including technical terms and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of simplicity and / or clarity, well-known functions or structures may not be described in detail.

[0049] The singular forms "a", "the" and "the" used in the specification include the plural forms unless clearly indicated. The terms "include", "comprise" and "contain" used in the specification indicate the presence of the claimed features, but do not exclude the presence of one or more other features. The term "and / or" used in the specification includes any and all combinations of one or more of the relevant listed items. The terms "between X and Y" and "between approximately X and Y" used in the specification should be interpreted as including X and Y. The term "between approximately X and Y" used in this specification means "between approximately X and approximately Y", and the term "from approximately X to Y" used in this specification means "from approximately X to approximately Y".

[0050] In the specification, when an element is said to be "on", "attached", "connected", "coupled", or "contacting" another element, the element may be directly on, attached, connected, coupled, or contacting another element, or there may be an intermediate element. In contrast, when an element is said to be "directly" "on", "directly attached", "directly connected", "directly coupled", or "directly contacting" another element, there will be no intermediate element. In the specification, a feature is arranged "adjacent" to another feature, which may refer to a feature having a portion that overlaps with an adjacent feature or a portion that is located above or below an adjacent feature.

[0051] In the specification, spatial relational terms such as "upper", "lower", "left", "right", "front", "back", "higher", "lower", etc. may describe the relationship of one feature to another feature in the drawings. It should be understood that the spatial relational terms include different orientations of the device in use or operation in addition to the orientation shown in the drawings. For example, when the device in the drawings is turned over, features previously described as being "below" other features may now be described as being "above" the other features. The device may also be oriented in other ways (rotated 90 degrees or in other orientations), and the relative spatial relationships will be interpreted accordingly.

[0052] Figure 1 and 2 The assembled stereogram and exploded stereogram of the safety belt self-locking tongue 1 according to the first embodiment of the present disclosure are respectively shown. As shown in the figure, the safety belt self-locking tongue 1 includes a tongue body 2, and a rotating body 3 and a reset member 4 arranged on the tongue body 2. The tongue body 2 is connected to the safety belt webbing 5 in a slidable manner and can be removably inserted into the safety belt latch (not shown). The rotating body 3 is rotatably supported on the tongue body 2, and can be rotated from an initial position to a locked position to clamp and lock the safety belt webbing 5 together with the tongue body 2. The reset member 4 is arranged in the rotating body 3, and is used to reset the rotating body 3 from the locked position to the initial position.

[0053] The bolt body 2 includes a lower latch portion 22 and an upper webbing portion 21. The latch portion 22 is connected to the webbing portion 21, and the two can be integrally formed. The latch portion 22 extends downward from the webbing portion 21 and is elongated. The latch portion 22 can be inserted into the seat belt latch, so that the seat belt webbing 5 can restrain the passenger on the vehicle seat.

[0054] The webbing portion 21 is in the shape of a roughly rectangular plate, and the four corners of the rectangle may be rounded. The webbing portion 21 may have a certain curvature in the vertical direction. The convex side of the webbing portion 21 is referred to as the front side, and the concave side is referred to as the rear side. A horizontal opening 212 is provided on the base plate 211 of the webbing portion 21 for the seat belt webbing 5 to pass through. The horizontal opening 212 may be elongated and approximately located at the center of the base plate 211. Figure 3 and 4 As shown, the horizontal opening 212 includes an upper surface 212T, a lower surface 212B, and two side surfaces connecting the upper surface 212T and the lower surface 212B. The upper surface 212T is in an outwardly convex arc shape, which is used to contact the rotating body 3 and guide the rotating body 3 to slide thereon. The lower surface 212B is substantially flat and is opposite to the rotating body 3, so that a webbing channel 212C for the safety belt webbing 5 to pass through is formed therebetween. When the rotating body 3 is in the initial position (see Figure 3 ), the lower surface 212B and the rotating body 3 are spaced apart by a distance, the webbing channel 212C is opened, and the safety belt webbing 5 can freely move through it. Figure 4 ), the webbing channel 212C is closed, and the rotating body 3 and the lower surface 212B clamp the seat belt webbing 5, thereby locking the seat belt webbing 5 in place.

[0055] return Figure 2 The webbing portion 21 is provided with left and right support portions 213 on the left and right sides of the horizontal opening 212 to rotatably support the rotating body 3 on the lock tongue body 2. Each support portion 213 includes a support portion main body 214 extending rearward perpendicularly to the base plate 211. The outer surface of the support portion main body 214 can be arranged to be flush with the side surface of the base plate 211, or spaced inward from the side surface of the base plate 211. The inner surface of the support portion main body 214 is provided with an arc-shaped protrusion 215 extending inward in the horizontal direction. The rotating body 3 can be supported on the arc-shaped protrusion 215 and rotate around the arc-shaped protrusion 215. The inner surface of the support portion main body 214 can prevent the rotating body 3 from shifting in the horizontal direction. Each support portion 213 is also provided with a horizontal through hole 216 for the reset member 4 to pass through. In addition, see Figure 5 A limiting groove 217 is provided on the outer side of the horizontal through hole 216 of the left supporting portion 213 to control the assembly angle of the reset member 4 and prevent the reset member 4 from being over-assembled and completely extending into the horizontal through hole 216 of the right supporting portion 213 .

[0056] The rotating body 3 cooperates with the locking tongue body 2 to clamp and lock the seat belt webbing 5 when an emergency occurs in the vehicle. Figure 2As shown, the rotating body 3 is roughly C-shaped and includes an upper curved surface 3T, a lower curved surface 3B, a front surface 3F, a rear surface 3R, and two side surfaces 3S connecting the above four surfaces. The lower curved surface 3B is placed on the arc-shaped protrusions 215 of the left and right supporting parts 213. The lower curved surface 3B is fitted with the upper surface of the arc-shaped protrusions 215, so that the lower curved surface 3B can rotate around the arc-shaped protrusions 215 between the initial position and the locked position. The upper curved surface 3T is fitted with the upper surface 212T of the horizontal opening 212 of the bolt body 2 or has the same radius of curvature, so that when the lower curved surface 3B rotates around the arc-shaped protrusions 215 between the initial position and the locked position, the upper curved surface 3T can slide along the upper surface 212T of the horizontal opening 212. That is, the rotating body 3 rotates in the channel formed by the upper surface 212T of the horizontal opening 212 of the lock tongue body 2 and the upper surface of the arc-shaped protrusion 215, so that the rotating body 3 can omit the rotating shaft that plays a supporting role, thereby reducing the weight of the parts.

[0057] The rear surface 3R abuts against the seat belt webbing 5, so that the movement of the seat belt webbing 5 can drive the rotating body 3 to rotate from the initial position to the locked position when an emergency occurs in the vehicle. When the rotating body 3 is in the locked position, the front surface 3F can clamp and lock the seat belt webbing 5 together with the lower surface 212B of the horizontal opening 212 of the lock tongue body 2. Figure 4 In some embodiments, the front surface 3F of the rotating body 3 and / or the lower surface 212B of the horizontal opening 212 has one or more teeth to increase the friction force so that no slipping occurs when clamping and locking the safety belt webbing 5 .

[0058] The rotating body 3 also includes a through hole 31 that passes through its two side surfaces 3S, which is used to accommodate the reset member 4. The through hole 31 is only open on the two side surfaces 3S, and is not exposed on other surfaces of the rotating body 3. In the cross section along the front-to-back direction, the curvature of the outer contour of the through hole 31 is roughly the same as the upper curved surface 3T of the rotating body 3, so that the movement trajectory of the reset member 4 and the rotating body 3 is consistent, which is conducive to the reset member 4 returning to the initial position smoothly. The through hole 31 can be located at the rear side of the rotating body 3. In some embodiments, the through hole 31 is roughly waist-shaped.

[0059] The reset member 4 is used to hold the rotating body 3 on the bolt body 2 and bias it to the initial position, and reset the rotating body 3 from the locked position to the initial position when the rotating body 3 is in the locked position. Figure 2As shown, the reset member 4 is roughly linear. The reset member 4 has one or more wavy portions 41 at its center, and the height of the wavy portions 41 is greater than the height of the through hole 31 of the rotating body 3, so that the reset member 4 can be assembled in the through hole 31 in a pre-compressed manner. The right end of the reset member 4 is linear, and is used to be inserted into the horizontal through hole 216 of the right support portion 213. The left end of the reset member 4 is inserted into the horizontal through hole 216 of the left support portion 213, and the end has a roughly hook-shaped limiting portion 42, which is used to cooperate with the limiting groove 217 of the left support portion 213 to control the assembly angle of the reset member 4 and prevent the reset member 4 from being over-assembled and fully extending into the horizontal through hole 216 of the right support portion 213.

[0060] The limiting portion 42 and the wavy portion 41 form a certain angle, and the limiting groove 217 in the left support portion 213 forms the same angle as the horizontal through hole 216. The horizontal through hole 216 of the left support portion 213 is consistent in shape with the through hole 31 of the rotating body 3, so that the wavy portion 41 of the reset member 4 can be smoothly installed through the two through holes, thereby controlling the angle of the reset member 4 after installation. The limiting groove 217 contacts the end surface of the limiting portion 42 of the reset member 4 to prevent the reset member 4 from being over-assembled and completely extending into the horizontal through hole 216 of the right support portion 213.

[0061] like Figure 6 As shown, the reset member 4 sequentially passes through the horizontal through hole 216 of the left support portion 213 of the bolt body 2, the through hole 31 of the swivel 3, and the horizontal through hole 216 of the right support portion 213 of the bolt body 2, so that the swivel 3 is assembled on the bolt body 2 and maintained in the initial position. The horizontal through hole 216 of the right support portion 213 can not only support the reset member 4, but also facilitate the insertion of a disassembly tool therein to disassemble the reset member 4.

[0062] Below the joint Figure 3 and 4 The working principle of the seat belt self-locking tongue 1 according to the first embodiment of the present disclosure is described. When an emergency such as a vehicle collision occurs, the load on the seat belt webbing 5 exceeds the specified load, and the seat belt webbing 5 tends to move from its shoulder belt section 52 through the webbing channel 212C toward the waist belt section 51. The waist belt section 51 of the seat belt webbing 5 is tightly attached to the rear surface 3R of the rotating body 3 and generates sliding friction, thereby pushing the rotating body 3 to resist the restoring force of the restoring member 4 and rotate counterclockwise (see arrow A) around the arc-shaped protrusion 215 of the tongue body 2 from the initial position to the locked position.

[0063] In the locked position, the webbing channel 212C is closed, and the front surface 3F of the rotating body 3 presses the seat belt webbing 5 onto the lower surface 212B of the horizontal opening 212 until it is deformed, thereby clamping and locking the seat belt webbing 5. As a result, the waist belt section 51 and the shoulder belt section 52 of the seat belt webbing 5 cannot move relative to each other, thereby reducing the displacement of the passenger's waist and reducing the damage to the passenger's chest. At this time, the reset member 4 is in an elastically deformed state.

[0064] When the load applied to the seat belt webbing 5 is released, the waist belt section 51 of the seat belt webbing 5 is released from the contact with the rear surface 3R of the rotating body 3, and the restoring force of the reset member 4 returns the rotating body 3 from the locked position to the initial position. As a result, the front surface 3F of the rotating body 3 moves away from the lower surface 212B of the horizontal opening 212, and the webbing passage 212C is opened. The seat belt webbing 5 can move freely through the webbing passage 212C.

[0065] The following will refer to Figure 7 and 8 A seat belt self-locking tongue 1001 according to a second embodiment of the present disclosure is described. The seat belt self-locking tongue 1001 will use the reference numerals in the seat belt self-locking tongue 1 plus 1000 to indicate the same or similar structures.

[0066] like Figure 7 and 8 As shown, the safety belt self-locking bolt 1001 includes a bolt body 1002, and a rotating body 1003 and a reset member 1004 arranged on the bolt body 1002. The webbing portion 1021 of the bolt body 1002 is connected to the safety belt webbing 5 in a slidable manner, and the locking portion 1022 can be removably inserted into the safety belt latch (not shown). The lower surface 1003B of the rotating body 1003 is rotatably supported on the arc-shaped protrusion 1215 of the bolt body 1002, and the upper surface 1003T can slide along the upper surface 1212T of the horizontal opening 1212 of the webbing portion 1021 to rotate from the initial position to the locking position, thereby clamping and locking the safety belt webbing 5 together with the lower surface 1212B of the horizontal opening 1212. The reset member 1004 is disposed in the through hole 1031 of the rotating body 1003 and is used to reset the rotating body 1003 from the locked position to the initial position.

[0067] The difference between the safety belt self-locking tongue 1001 and the safety belt self-locking tongue 1 lies in the position and shape of the through hole 1031 of the rotating body 1003. The through hole 1031 is located at the front part of the tongue body 1002, not the rear part. The shape of the through hole 1031 is not a regular waist shape. Compared with the through hole 31 of the safety belt self-locking tongue 1, a relatively short branch portion 1031A is added at the end of the waist shape, which forms a certain angle (for example, 15 degrees) with the main waist. The curvature of the outer contour of the branch portion 1031A is roughly the same as the upper curved surface 1003T of the rotating body 1003, thereby ensuring that the reset member 1004 has enough space for compression during the process of the rotating body turning from the initial position to the locked position, ensuring that the movement trajectory of the reset member 1004 is consistent with the movement trajectory of the rotating body 1003, and preventing jamming during movement.

[0068] In an embodiment, the bolt body, the return member and the rotating body can be made of metal.

[0069] According to an embodiment of the present disclosure, a seat belt self-locking tongue with a locking function is provided, which can realize the locking function of the seat belt webbing.

[0070] The self-locking tongue of the safety belt according to the embodiment of the present disclosure utilizes an arc-shaped protrusion to support the rotating body instead of a rotating shaft, and has a simple structure and is easy to process and assemble.

[0071] According to the self-locking tongue of the seat belt according to the embodiment of the present disclosure, the reset part is installed into the rotating body from the side, eliminating the side cover, thereby reducing the number of parts, reducing the weight of the product, facilitating processing and assembly, and making the product more competitive in the market among similar products.

[0072] Although the exemplary embodiments of the present disclosure have been described, it should be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included in the scope of protection of the present disclosure as defined by the claims. The present disclosure is defined by the appended claims, and the equivalents of these claims are also included.

Claims

1. A self-locking tongue for a safety belt, characterized in that: The safety belt self-locking tongue comprises: a locking tongue body having a horizontal opening through which the seat belt webbing passes; A rotator supported near the horizontal opening of the bolt body and rotatable between an initial position and a locked position, the rotator having a through hole inside the rotator, the through hole opening only from the left and right surfaces of the rotator; and a reset member disposed in the through hole of the rotating body and configured to bias the rotating body to an initial position; Wherein, the bolt body is provided with a left supporting part and a right supporting part on the left and right sides of the horizontal opening respectively, and the left supporting part and the right supporting part are configured to support the rotating body; wherein the reset member is substantially linear and has one or more wavy portions in the center; Wherein, one end portion of the reset member has a limiting portion, and the limiting portion is configured to cooperate with a limiting groove on one of the left supporting portion and the right supporting portion; Wherein, the wavy portion of the reset member and the limiting portion form a certain angle, and the limiting groove of the one supporting portion and the through hole of the one supporting portion form the same angle.

2. The seat belt self-locking tongue according to claim 1, characterized in that: The reset member is arranged to pass through the through hole of the left supporting part, the through hole of the rotating body and the through hole of the right supporting part.

3. The seat belt self-locking tongue according to claim 1, characterized in that: The height of the wavy portion is greater than the height of the through hole of the rotating body, and the wavy portion is assembled in the through hole of the rotating body in a pre-compressed manner.

4. The seat belt self-locking tongue according to claim 1, characterized in that: The limiting portion is substantially hook-shaped.

5. The self-locking tongue of the safety belt according to claim 1, characterized in that: The limiting groove is arranged on the outer side of the through hole of the one supporting part in the horizontal direction.

6. The self-locking tongue of the safety belt according to claim 1, characterized in that: The through hole of the one supporting portion and the through hole of the rotating body have the same shape.

7. The seat belt self-locking tongue according to claim 1, characterized in that: The rotating body is substantially C-shaped and includes an upper curved surface, a lower curved surface, a front surface, a rear surface, and the left and right surfaces connecting the upper curved surface, the lower curved surface, the front surface, and the rear surface.

8. The self-locking tongue of the safety belt according to claim 7, characterized in that: The through hole of the rotating body is located at the rear side of the rotating body and is roughly waist-shaped.

9. The seat belt self-locking tongue according to claim 8, characterized in that: In the cross section along the front-rear direction, the curvature of the outer contour of the through hole of the revolution body is kept substantially the same as the curvature of the upper curved surface of the revolution body.

10. The self-locking tongue of the safety belt according to claim 7, characterized in that: The through hole of the rotating body is located at the front side portion of the rotating body and is substantially waist-shaped with a branch portion at the end.

11. The self-locking tongue of the safety belt according to claim 10, characterized in that: In a cross section along the front-rear direction, the curvature of the outer contour of the branch portion of the through hole of the revolution body is substantially the same as the upper curved surface of the revolution body.

12. The seat belt self-locking tongue according to claim 7, characterized in that: The left supporting part and the right supporting part are provided with arc-shaped protrusions extending inwardly in the horizontal direction, and the rotating body is supported on the arc-shaped protrusions and can rotate around the arc-shaped protrusions.

13. The self-locking tongue of the safety belt according to claim 12, characterized in that: The lower curved surface of the rotating body is fitted with the upper surface of the arc-shaped protrusion, so that the lower curved surface of the rotating body can rotate around the upper surface of the arc-shaped protrusion between an initial position and a locking position.

14. The seat belt self-locking tongue according to claim 12, characterized in that: The upper curved surface of the rotating body fits with the upper surface of the horizontal opening, so that when the rotating body rotates around the arc-shaped protrusion between the initial position and the locking position, the upper curved surface of the rotating body can slide along the upper surface of the horizontal opening.

15. The self-locking tongue of the safety belt according to claim 14, characterized in that: The upper surface of the horizontal opening is in an outwardly convex arc shape.

16. The seat belt self-locking tongue according to claim 12, characterized in that: The rotating body is configured to rotate in a channel formed by the upper surface of the horizontal opening and the upper surface of the arc-shaped protrusion.

17. The self-locking tongue of the safety belt according to claim 7, characterized in that: The rear surface of the rotator abuts against the seat belt webbing, so that the movement of the seat belt webbing can drive the rotator to rotate from the initial position to the locking position.

18. The self-locking tongue of the safety belt according to claim 7, characterized in that: A webbing channel for the seat belt webbing to pass through is formed between the front surface of the rotator and the lower surface of the horizontal opening, wherein when the rotator is in the initial position, the front surface of the rotator and the lower surface of the horizontal opening are spaced a distance apart, and when the rotator is in the locked position, the front surface of the rotator and the lower surface of the horizontal opening clamp the seat belt webbing together.

19. The seat belt self-locking tongue according to claim 18, characterized in that: The front surface of the rotating body and / or the lower surface of the horizontal opening are provided with one or more teeth.

20. The self-locking tongue of the safety belt according to claim 1, characterized in that: The bolt body, the reset piece and the rotating body are made of metal.

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