Locking bolt for safety belt and safety belt device

Abstract

The present disclosure relates to a locking bolt for a safety belt, comprising a bolt body having a mortise section configured for insertion into a safety belt mortise and a deflection section configured for deflection of a webbing of the safety belt, the deflection section having a passage opening for passage of the webbing, the device is characterized in that a clamping-elastic element is arranged on the deflection section, the clamping-elastic element can move between a release position and a clamping position, in the release position, the webbing can move freely, and in the clamping position, the webbing is clamped by the clamping-elastic element. The webbing is clamped between the clamping-elastic element and a lower surface of the through-opening, which is configured to clamp the webbing together with the clamping-elastic element, the clamping-elastic element being configured to be able to return from a clamping position to a release position by its own resilience force when the webbing is not constrained. In addition, the invention also relates to a safety belt device comprising the locking bolt.

Description

Technical Field

[0001] This disclosure relates to the field of motor vehicle safety technology, and more specifically, to a locking latch for a seat belt and a seat belt device including such a locking latch. Background Technology

[0002] Three-point seat belts are now widely used in vehicles. During use, the webbing of a three-point seat belt consists of two parts: shoulder straps to restrain the upper body and lap belts to restrain the waist. The seat belt webbing has a sliding latch. When the latch is inserted into the seat belt latch and fastened, it provides the restraint function of a standard seat belt to protect the occupant. However, ordinary seat belt latches do not have the ability to lock the webbing. This means that in emergency situations such as collisions, the latch may not provide sufficient friction to prevent the lap belt from being pulled out, affecting the occupant's posture and causing excessive hip displacement and forward leaning of the upper body.

[0003] In the locking tongue known from DE102004023394A1, when tightened, the webbing presses against the clamping elastic element due to the pressure acting on the webbing. The clamping elastic element is carried into the webbing channel by the webbing due to the friction between it and the webbing until the clamping elastic element locks the webbing.

[0004] To ensure that the clamping-elastic element returns to the released position after the constraint condition ends, without affecting the normal use of the latch, a deflection spring is provided in the latch known from DE202010013986U1. However, the disadvantage of this solution is that it involves a large number of parts.

[0005] In known latches, the spring element is integrally molded in one piece on the steering section, simplifying latch assembly. However, in the prior art, at least one additional spring element is provided, which loads the clamping element in the released position. Summary of the Invention

[0006] The purpose of this disclosure is to provide a locking bolt for a seat belt and a seat belt device including such a locking bolt, wherein the locking bolt according to this application has fewer parts, a simpler structure, and is lighter than the prior art. Furthermore, the clamping-elastic element of the locking bolt enables both clamping and resetting functions simultaneously.

[0007] According to a first aspect of this disclosure, a locking bolt for a seat belt is provided, the locking bolt comprising a bolt body having a locking section configured for insertion into a seat belt latch and a turning section configured for turning the webbing of the seat belt, the turning section having a through opening for the webbing to pass through, characterized in that a clamping-elastic element is provided on the turning section, the clamping-elastic element being movable between a release position and a clamping position, in which the webbing is free to move, and in the clamping position, the webbing is clamped between the clamping-elastic element and a lower surface of the through opening configured to clamp the webbing together with the clamping-elastic element, wherein the clamping-elastic element is configured to return from the clamping position to the release position by its own rebound force when the webbing is unrestrained.

[0008] Compared to existing solutions with two separate clamping and resilient elements, the locking tongue according to this disclosure can clamp and lock the webbing when constraint is required and self-reset after the constraint ends, thus simultaneously achieving clamping and resetting functions. This allows for the same functionality as in the prior art with fewer parts, resulting in fewer components and significantly reduced weight (i.e., lighter weight). Furthermore, it enables lower manufacturing costs and simpler assembly. According to this disclosure, because the clamping-resilient element is configured to simultaneously function as a resilient element, the installation and assembly of an additional resilient element that might otherwise be required is eliminated. Compared to the prior art, the locking tongue can achieve resetting without the need for additional spring components.

[0009] Generally, seat belts are used to protect occupants in the event of a vehicle collision. In a three-point seat belt, the webbing that passes through the occupant's waist and chest provides protection when the locking latch is properly engaged with the seat belt latch. Upon impact, a retractor can be engaged by means of a pretensioner or inertia mechanism, preventing the webbing from being pulled out. Thus, the webbing firmly restrains the occupant in the designated position in the seat, which is the desired restraint effect. Generally, in non-collision situations, the webbing can be freely pulled out of the retractor, and the locking latch can slide freely on the webbing, at which point the webbing is unrestrained.

[0010] In some embodiments, the turning section may have a receiving structure for receiving a clamping-elastic element, the receiving structure being configured to allow the clamping-elastic element to move in a guided manner at the receiving structure, and the receiving structure cooperating with the clamping-elastic element such that, in the unconstrained state of the webbing, the clamping-elastic element is guided to return to the release position based on its own rebound force.

[0011] In some embodiments, the clamping-elastic element may have a compressible compression structure configured to generate elastic potential energy in the clamped position due to compression of the compression structure by the webbing on the clamping-elastic element, such that in the unconstrained state of the webbing, the clamping-elastic element returns from the clamped position to the released position based on the rebound force caused by the elastic potential energy of the compression structure.

[0012] In some embodiments, viewed in a side projection, the receiving structure may have a cross-sectional geometry that complements the cross-sectional geometry of the compression structure of the clamping-elastic element, such that the clamping-elastic element, in the clamped position, both clamps the webbing and generates elastic potential energy for resetting based on the compression of the compression structure. Thus, in the clamped position, the clamping-elastic element tends to reset to the release position, allowing it to reset to the release position based on its rebound force when the webbing is unconstrained.

[0013] In some embodiments, viewed in a side projection, the compression structure of the clamping-elastic element may have a first side facing the webbing being turned in the installed state and a second side facing away from the webbing being turned. The receiving structure accordingly has a lower first receiving surface for contacting and engaging with the first surface and an upper second receiving surface for contacting and engaging with the second surface. The first and second receiving surfaces are configured relative to each other such that the clamping-elastic element will not get stuck in the receiving structure under the action of the rebound force in the clamped position and can be reset to the release position when the webbing is unconstrained.

[0014] In some embodiments, the second surface of the compression structure of the clamping-elastic element and the second receiving surface of the receiving structure can be configured such that the second surface of the compression structure of the clamping-elastic element can fit against the second receiving surface of the receiving structure and is flat in the fitting area, so that when the clamping-elastic element moves between a release position and a clamping position, the second surface of the compression structure of the clamping-elastic element can slide along the second receiving surface of the receiving structure. In this document, "flat" means without significant undulations or unevenness that would impede the movement of the clamping-elastic element.

[0015] In some embodiments, the first receiving surface may be configured to be curved and the second receiving surface to be flat, or both the first and second receiving surfaces may be flat; and / or, when viewed in a lateral projection, the cross-sectional geometry of the receiving structure may gradually or stepwise narrow from the outside in.

[0016] In some embodiments, the compression structure of the clamping-elastic element may include a front section located at the front and a rear section located at the rear in the insertion direction of the clamping-elastic element. The rear section includes a first opening portion at a rear end opposite to the front end face for clamping the webbing. The first opening portion is substantially outwardly oriented and is capable of closing at least partially during the movement of the clamping-elastic element from a released position to a clamped position, so that the compression structure of the clamping-elastic element is compressed and thereby generates elastic potential energy.

[0017] In some embodiments, the compression structure of the clamping-elastic element can be configured to have a V-shaped or C-shaped cross-sectional geometry in the release position.

[0018] In some embodiments, when viewed in a side projection, the first surface of the compression structure of the clamping-elastic element may be configured to be concave toward the interior of the compression structure of the clamping-elastic element and have an arc shape.

[0019] In some embodiments, viewed in a lateral projection, the clamping-elastic element may be configured to have an L-shaped cross-sectional profile in the release position, and the receiving structure accordingly has an L-shaped cross-sectional shape corresponding to the L-shaped cross-sectional profile of the clamping-elastic element and has an inner receiving section and an outer receiving section, wherein, at least in the release position, the front section of the clamping-elastic element is received in the inner receiving section of the receiving structure, while the rear section of the clamping-elastic element is received in the outer receiving section of the receiving structure.

[0020] In some embodiments, the turning section may have an arched portion inside the curved region of the L-shaped cross-section of the receiving structure. The arched portion is configured to allow the clamping-elastic element to slide on its arc-shaped first surface as it moves between a release position and a clamping position, so that the clamping-elastic element slides into the inner receiving section of the receiving structure when clamping the webbing or slides out of the inner receiving section based on the rebound force when the webbing is unrestrained.

[0021] In some embodiments, the first opening portion of the clamping-elastic element may be designed such that when the clamping-elastic element is under force, the portions of the clamping-elastic element at both ends of the first opening portion abut against each other and thus the first opening portion is completely closed, so that the clamping-elastic element can clamp the webbing at least partially with its front end face and retain at least partially with its rear section in the outer receiving section of the receiving structure, and when the clamping-elastic element is in a decompression state, the clamping-elastic element can return to the release position based on the rebound force when the webbing is unrestrained.

[0022] In some embodiments, in the clamping position of the clamping-elastic element, when the first opening is fully closed, the center of the arcuate section of the compression structure of the clamping-elastic element can extend into the inner receiving section of the receiving structure, while at least a rear portion of the arcuate section of the compression structure of the clamping-elastic element remains in the outer receiving section of the receiving structure.

[0023] In some embodiments, the dimensions of the receiving structure in the outer receiving section and the dimensions of the compression structure of the clamping-elastic element in the rear section can be designed such that the clamping-elastic element is received in the receiving structure in a pre-tightened state in the released position.

[0024] In some embodiments, a hook bend may be provided at the outer edge of the receiving structure in the turning section, and the two legs of the rear section of the clamping-elastic element can be stopped at the hook bend in the release position.

[0025] In some embodiments, a rod-shaped pin may be provided in the turning section, the pin being configured to provide support for the compression structure of the clamping-elastic element between the release position and the clamping position, and to limit over-clamping by restricting the position of the compression structure of the clamping-elastic element when the force on the webbing rises excessively.

[0026] In some embodiments, the pin can be inserted through a mounting hole located on the side of the turning section of the latch body and is interference-fitted with the mounting hole.

[0027] In some embodiments, the pin may have a circular, elliptical, or oval cross-sectional shape.

[0028] In some embodiments, the pin may be arranged in the steering section such that the compression structure of the clamping-elastic element at least partially abuts against the pin with its arcuate section in the released position, and thus the pin at least partially engages with the arcuate section of the compression structure of the clamping-elastic element.

[0029] In some embodiments, the compression structure of the clamping-elastic element can abut against the pin in the release position with the central portion of its arcuate segment.

[0030] In some embodiments, the pin can be configured to project outward relative to the first receiving surface of the receiving structure when viewed in a lateral projection, thereby causing the clamping-elastic element to reach its clamping position earlier when the pin is present compared to when the pin is absent.

[0031] In some embodiments, the clamping-elastic element may be made of metal or plastic with spring elasticity.

[0032] In some implementations, an additional elastic element may be provided inside the clamping-elastic element to increase the elasticity of the clamping-elastic element.

[0033] In some embodiments, the cross-sectional shape of the elastic element may correspond to the cross-sectional shape of the interior of the clamping elastic element in the clamping position.

[0034] In some embodiments, the elastic element may be made of rubber or plastic.

[0035] In some embodiments, the elastic element and the clamping-elastic element may be constructed as a single unit.

[0036] In some embodiments, the receiving structure may include first grooves for compressing the structure, respectively disposed at the two ends of the through opening in the turning section.

[0037] In some embodiments, the first receiving surface of the receiving structure for the compression structure may be formed by the lower surface of the first groove, while the second receiving surface of the receiving structure for the compression structure may be formed by the upper surface of the first groove and / or the upper surface of the through opening.

[0038] In some embodiments, when the second receiving surface of the receiving structure for the compression structure is simultaneously formed by the upper surface of the first groove and the upper surface of the through opening, the upper surface of the first groove and the upper surface of the through opening can be flush when viewed from the side.

[0039] In some embodiments, the upper surface of the through opening may form an acute angle with the extending direction of the lower surface of the through opening.

[0040] In some embodiments, the clamping-elastic element may have an expandable expansion structure configured to generate elastic potential energy in the clamped position due to the expansion of the expansion structure of the receiving structure on the clamping-elastic element, such that in the unconstrained state of the webbing, the clamping-elastic element returns from the clamped position to the released position based on the rebound force caused by the elastic potential energy of the expansion structure.

[0041] In some embodiments, viewed in a side projection, the receiving structure may have an insert that can be embedded into the expansion structure of the clamping-elastic element and has a cross-sectional geometry that matches the cross-sectional geometry of the expansion structure of the clamping-elastic element in such a way that the clamping-elastic element can clamp the webbing in the clamping position, and also generate elastic potential energy for resetting based on the expansion of the expansion structure.

[0042] In some embodiments, the expansion structure may include a second opening portion that opens substantially inward, the second opening portion being configured to further open as the receiving structure's engagement portion engages during movement from the release position to the clamping position.

[0043] In some embodiments, the expansion structure of the clamping-elastic element may be configured to have a V-shaped cross-sectional geometry in the release position.

[0044] In some embodiments, the interlocking portion may be configured with a substantially wedge-shaped form.

[0045] In some embodiments, the expansion structure may include at least one resilient arm extending laterally from the body of the clamping-elastic element.

[0046] In some embodiments, two or more elastic arms may be constructed, at least some of the elastic arms being constructed in pairs and symmetrically about the center plane of the clamping-elastic element.

[0047] In some embodiments, the magnitude of the rebound force of the expansion structure can be adjusted by lengthening or shortening the elastic arm.

[0048] In some embodiments, the clamping-elastic element may have, in addition to the expansion structure, a guide structure consisting of the body of the clamping-elastic element, the guide structure being configured to guide the clamping-elastic element during movement between a clamping position and a release position.

[0049] In some embodiments, the receiving structure may include a second groove for guiding the clamping-elastic element, the second groove being disposed beside the two ends of the through opening in the turning section.

[0050] In some embodiments, the upper and lower surfaces of the second groove may be constructed substantially parallel to each other.

[0051] In some embodiments, the friction between the guide structure of the clamping-elastic element and the locking tongue body can be adjusted by adjusting the gap between the upper and lower surfaces of the second groove.

[0052] In some embodiments, the insert portion of the receiving structure may be disposed between each of the second slots.

[0053] In some embodiments, the clamping-elastic element and the receiving structure can cooperate with each other such that, in the released position, the expansion structure is at least partially embedded by the engagement portion of the receiving structure in the pre-tightened state.

[0054] In some embodiments, the edge of the clamping-elastic element that contacts the webbing may be chamfered.

[0055] In some implementations, a single clamping-elastic element can be provided, which can simultaneously achieve clamping and resetting functions.

[0056] According to a second aspect of this disclosure, a seatbelt device for motor vehicles is provided. The seatbelt device may include webbing and includes a locking latch of the first aspect of this disclosure, capable of locking onto the webbing in an emergency. Thus, when the seatbelt is locked, the webbing is clamped by the clamping-elastic element of the locking latch, preventing the webbing from sliding freely in the torso and pelvic regions under restraint, protecting the pelvic region and preventing excessive forward movement of the upper body. Furthermore, after the restraint is lifted, the clamping-elastic element can return to its released position based on its rebound force, i.e., self-resetting. Attached Figure Description

[0057] The present disclosure will now be described in more detail with reference to the accompanying drawings and specific embodiments. The schematic drawings are briefly described below:

[0058] Figure 1 This is a schematic perspective view of the locking bolt according to the first embodiment of this disclosure;

[0059] Figure 2 yes Figure 1 A schematic exploded view of the locking bolt in the middle;

[0060] Figure 3 yes Figure 1 The locking tongue is shown in a cross-sectional view of the through-opening for the webbing, where the clamping-elastic element is in the released position;

[0061] Figure 4 yes Figure 1 Another cross-sectional view of the locking tongue in the through-hole for the webbing, wherein the clamping-elastic element is in the clamping position;

[0062] Figure 5 yes Figure 3 A cross-sectional view of the locking tongue in the middle, cut at the first groove for clamping the elastic element;

[0063] Figure 6 yes Figure 4 A cross-sectional view of the locking tongue in the middle, cut at the first groove for clamping the elastic element;

[0064] Figure 7 This is a schematic perspective view of a clamping-elastic element according to this disclosure without additional elastic elements;

[0065] Figure 8 It is a schematic perspective view of a clamping-elastic element according to this disclosure with additional elastic elements;

[0066] Figure 9 This is a cross-sectional view of the locking tongue according to the second embodiment of the present disclosure, cut at the through opening for the webbing, wherein the clamping-elastic element is in the released position;

[0067] Figure 10 This is another cross-sectional view of the locking tongue according to the second embodiment of the present disclosure, cut at the through opening for the webbing, wherein the clamping-elastic element is in the clamping position;

[0068] Figure 11 yes Figure 9 A cross-sectional view of the locking tongue in the middle, cut at the first groove for clamping the elastic element;

[0069] Figure 12 yes Figure 10 A cross-sectional view of the locking tongue in the middle, cut at the first groove for clamping the elastic element;

[0070] Figure 13 This is a cross-sectional view of the locking tongue according to the third embodiment of this disclosure;

[0071] Figure 14 This is a schematic perspective view of a locking bolt according to the fourth embodiment of this disclosure;

[0072] Figure 15 yes Figure 14 A cross-sectional view of the locking tongue at the engagement portion of the receiving structure, wherein the clamping-elastic element is in the released position;

[0073] Figure 16 yes Figure 14 Another cross-sectional view of the locking tongue at the engagement portion of the receiving structure, wherein the clamping-elastic element is in the clamping position;

[0074] Figure 17 This is a schematic perspective view of the clamping-elastic element of the locking tongue according to the fourth embodiment of this disclosure;

[0075] Figure 18 yes Figure 17 A cross-sectional view of the clamping-elastic element in the image. Detailed Implementation

[0076] First refer to Figures 1 to 6 The locking tongue 1 according to the first embodiment of this disclosure is described.

[0077] Figure 1 and Figure 2A schematic perspective view and a schematic exploded view of the locking bolt 1 according to the first embodiment of this disclosure are shown respectively. Figure 1 and Figure 2 As shown, the locking tongue 1 for the seat belt includes a tongue body 2 and a clamping-elastic element 3, wherein the clamping-elastic element 3 is disposed on the tongue body 2. The tongue body 2 is slidably connected to the webbing 5 of the seat belt (see...) Figure 3 and Figure 4 The latch body 2 includes a steering section 21 (also called a "webbing portion") configured to turn the webbing 5 of the seat belt, and a locking section 22 (also called a "locking portion") configured to be inserted into the seat belt lock (not shown). The locking section 22 is connected to the steering section 21, and the two may be integrally formed. The locking section 22 extends downward from the steering section 21 and is elongated. The locking section 22 can be inserted into the seat belt lock, thereby enabling the seat belt webbing 5 to restrain the passenger to the seat.

[0078] The steering section 21 is generally plate-shaped and may have chamfered corners. The steering section 21 may have a certain curvature when viewed from the side. A through opening 212 is provided in the steering section body 211 of the steering section 21 for the seatbelt webbing 5 to pass through. The through opening 212 may be elongated. The through opening 212 may be located approximately at the center of the steering section body 211.

[0079] like Figure 1 and Figure 2 As shown, the clamping-elastic element 3 is disposed on the turning section 21 and can be received in the receiving structure 4 for clamping-elastic element 3.

[0080] like Figures 1 to 6As shown, a receiving structure 4 for receiving the clamping-elastic element 3 is constructed in the turning section 21. The receiving structure 4 is configured to allow the clamping-elastic element 3 to move in a guided manner at the receiving structure 4, and the receiving structure 4 cooperates with the clamping-elastic element 3 such that, in the unconstrained state of the webbing 5, the clamping-elastic element 3 is guided to return to the release position based on its own rebound force. Here, the receiving structure 4 includes a first groove 410 respectively provided in the turning section 21 beside the two ends of the through opening 212, and a portion of the through opening 212 (here, the upper surface 212A of the through opening 212). At this time, the upper surface 410A of the first groove 410 and the upper surface 212A of the through opening 212 are flush when viewed from the side. That is, the upper surface 410A of the first groove 410 and the upper surface 212A of the through opening 212 together constitute the upper surface of the receiving structure 4, while the lower surface 410B of the first groove 410 constitutes the lower surface of the receiving structure 4. The composition of receiving structure 4 will be described in detail later.

[0081] like Figure 1 and Figure 2 as well as Figure 5 and Figure 6 As shown, protrusions 213 are provided at both ends of the through opening 212 on the turning section 21. A first groove 410 extends partially into the protrusions 213 and partially into the turning section body 211. The first groove 410 can be extended such that the clamping-elastic element 3 can clamp the webbing 5 together with the lower surface 212B of the through opening 212 in the clamping position.

[0082] The following uses Figures 3 to 6 describe Figure 1 The working principle of the clamping-elastic element 3 of the locking tongue 1 in the first embodiment is as follows: Figure 3 and Figure 4 Show respectively according to Figure 1 A cross-sectional view of the locking tongue 1 taken at the through opening 212 for the webbing 5, showing the clamping-elastic element 3 in both the released and clamped positions. Figure 5 and Figure 6 Then show respectively Figure 3 and 4 A cross-sectional view of the locking tongue 1 in the middle, cut at the first groove 410 for clamping the elastic element 3.

[0083] like Figures 3 to 6As shown, the clamping-elastic element 3 has a compressible compression structure 310, which is configured to generate elastic potential energy in the clamped position due to the compression of the compression structure 310 by the webbing 5, such that when the webbing 5 is unconstrained, the clamping-elastic element 3 returns to the released position from the clamped position based on the rebound force caused by the elastic potential energy of the compression structure 310.

[0084] Clamping-elastic element 3 can Figure 3 The release position shown and Figure 4 The movement occurs between the clamping positions shown. In, as... Figure 3 In the released position shown, the webbing 5 can move freely. When moving from the released position to the clamped position, the clamping-elastic element 3 can move toward the lower surface 212B of the through-opening 212, configured to clamp the webbing 5 together with the clamping-elastic element 3, so that... Figure 4 In the clamping position shown, the webbing 5 is clamped between the clamping-elastic element 3, particularly the front end face 3C of the clamping-elastic element 3, and the lower surface 212B of the through opening 212. The lower surface 212B of the through opening 212 and the clamping-elastic element 3 form a webbing channel 212C through which the seatbelt webbing 5 passes. Figure 3 As shown, when the clamping-elastic element 3 is in the released position, the lower surface 212B of the through opening 212 and the clamping-elastic element 3 are spaced apart by a distance, allowing the webbing 5 to move freely within the webbing channel 212C. Figure 4 As shown, when the clamping-elastic element 3 moves from the release position to the clamping position, the webbing 5 of the seat belt is clamped between the clamping-elastic element 3 and the lower surface 212B of the through opening 212, thereby locking the webbing 5.

[0085] Unlike existing technologies, in this disclosure, the clamping-elastic element 3 also functions as a reset element. In the first embodiment of the locking tongue 1, the clamping-elastic element 3 generates elastic potential energy due to the compression of the compression structure 310 by the webbing 5, causing the clamping-elastic element 3 to reset to the release position under unconstrained conditions due to the elastic potential energy of the compression structure 310. The webbing 5 is then released and can move freely within the webbing channel 212C.

[0086] The clamping-elastic element 3 is made of metal with spring elasticity. In other embodiments, the clamping-elastic element 3 may also be made of plastic with spring elasticity.

[0087] To ensure that the clamping-elastic element 3 reliably enters the clamping position and simultaneously returns to the release position by its own rebound force, the receiving structure 4, viewed in side projection, has a cross-sectional geometry that interacts with the cross-sectional geometry of the compression structure 310 of the clamping-elastic element 3 in such a way that the clamping-elastic element 3, in the clamping position, can clamp the webbing 5 while simultaneously generating elastic potential energy for resetting based on the compression of the compression structure 310. For example, when the clamping-elastic element 3 can open, the cross-sectional geometry of the receiving structure 4 and the compression structure 310 of the clamping-elastic element 3 can interact in such a way that the clamping-elastic element 3 tends to open outward in the clamping position to return to the release position, thereby allowing the clamping-elastic element 3 to return to the release position based on its rebound force when the webbing 5 is unconstrained.

[0088] from Figures 3 to 6 As can be seen in the side projection, in the first embodiment of the locking tongue 1, the compression structure 310 of the clamping-elastic element 3 has a first surface 3A facing the turning webbing 5 in the installed state and a second surface 3B facing away from the turning webbing 5. The receiving structure 4 correspondingly has a lower first receiving surface 4A for contacting and engaging with the first surface 3A and an upper second receiving surface 4B for contacting and engaging with the second surface 3B. To ensure that the clamping-elastic element 3 can smoothly return to the release position in an unconstrained state, the first guide surface 4A and the second guide surface 4B are configured relative to each other such that the clamping-elastic element 3 will not be stuck in the receiving structure 4 under the action of the rebound force in the clamped position and can return to the release position in an unconstrained state of the webbing 5. In the first embodiment of the locking tongue 1, the first receiving surface 4A is formed by the lower surface 410B of the first groove 410, while the second receiving surface 4B is formed by the upper surface 410A of the first groove 410 and the upper surface 212A of the through opening 212. In other embodiments not shown, the second receiving surface 4B may also be formed solely by the upper surface 410A of the first groove 410 or the upper surface 212A of the through opening 212. The upper surface 212A of the through opening 212 may extend over the entire through opening 212. In other embodiments not shown, the upper surface 212A of the through opening 212 may also extend over a portion of the through opening 212.

[0089] To enable the clamping-elastic element 3 to slide within the receiving structure 4 during movement between the release and clamping positions, the second surface 3B of the compression structure 310 of the clamping-elastic element 3 and the second receiving surface 4B of the receiving structure 4 are configured such that the second surface 3B of the clamping-elastic element 3 can conform to the second receiving surface 4B of the receiving structure 4 and is flat in the conforming area. In this document, "flat" does not exclude the possibility of having a small curvature or slight undulations or unevenness. Thus, when the clamping-elastic element 3 moves between the release and clamping positions, the second surface 3B of the compression structure 310 of the clamping-elastic element 3 can slide along the second receiving surface 4B of the receiving structure 4.

[0090] The first receiving surface 4A and the second receiving surface 4B can be as follows: Figure 5 and Figure 6 The structure is constructed as described above, wherein the first receiving surface 4A can be curved, while the second receiving surface 4B can be flat. Alternatively, the first receiving surface 4A and the second receiving surface 4B can each be constructed flat. To enable the clamping-elastic element 3 to self-reset in the unconstrained state of the webbing 5, the cross-sectional geometry of the receiving structure 4, viewed in lateral projection, can gradually or stepwise narrow from the outside in. The extending directions of the first receiving surface 4A and the second receiving surface 4B can form approximately an acute angle with each other, chosen such that the clamping-elastic element 3, in the clamped position, does not self-lock under the action of the rebound force and can reset to the released position in the unconstrained state of the webbing 5. Here, the extending directions of the first receiving surface 4A and the second receiving surface 4B can refer to the average extending direction, which is applicable when the receiving surface is curved. Figures 3 to 6 As shown, when the clamping-elastic element 3 moves between the release position and the clamping position, the clamping-elastic element 3 can slide on the upper surface 410A of the first groove 410 and the upper surface 212A of the through opening 212.

[0091] In addition, such as from Figure 5 and Figure 6As can be seen, the compression structure 310 of the clamping-elastic element 3 includes a front section 31 located at the front end and a rear section 32 located at the rear end in the insertion direction of the clamping-elastic element 3. The rear section 32 has a first opening portion 3D at a rear end opposite to the front end face 3C used for clamping the webbing 5. The first opening portion 3D opens substantially outward. Here, "outward" means in the direction opposite to the insertion direction of the clamping-elastic element 3. The first opening portion 3D is capable of closing at least partially during the movement of the clamping-elastic element 3 from the release position to the clamping position, so that the compression structure 310 of the clamping-elastic element 3 is compressed and thereby generates elastic potential energy. This first opening portion 3D facilitates the compression of the compression structure 310 of the clamping-elastic element 3 when subjected to the action of the webbing 5.

[0092] The compression structure 310 of the clamping-elastic element 3 can be as follows: Figure 3 and Figure 5 The configuration shown is roughly C-shaped in the release position.

[0093] Viewed in a side projection, the first surface 3A of the compression structure 310 of the clamping-elastic element 3 is concave towards the interior of the compression structure 310 and is arc-shaped, thus having an arc-shaped section 3E. This arc-shaped section 3E of the clamping-elastic element 3 can substantially correspond geometrically to the curved first receiving surface 4A of the receiving structure 4. Therefore, an advantageous fit of the clamping-elastic element 3 within the receiving structure 4, particularly within the first groove 410, can be achieved.

[0094] like Figure 5 and Figure 6 As shown, viewed in a side projection, the clamping-elastic element 3 is configured with an L-shaped cross-sectional profile in the release position. The receiving structure 4 correspondingly has an L-shaped cross-sectional shape corresponding to this L-shaped profile of the clamping-elastic element 3 and has an inner receiving section 41 and an outer receiving section 42. At least in the release position, the front section 31 of the clamping-elastic element 3 is received in the inner receiving section 41 of the receiving structure 4, while the rear section 32 of the clamping-elastic element 3 is received in the outer receiving section 42 of the receiving structure 4. Preferably, the front section 31 and the rear section 32 of the clamping-elastic element 3 are received substantially in contact with each other in the inner receiving section 41 and the outer receiving section 42 of the receiving structure 4, respectively.

[0095] Inside the curved region of the L-shaped cross-section of the receiving structure 4, the turning section 21 has an arched portion 214. The arched portion 214 is configured to allow the clamping-elastic element 3 to slide on its arc-shaped first surface 3A as it moves between the release and clamping positions, so that the clamping-elastic element 3 slides into the inner receiving section 41 of the receiving structure 4 when clamping the webbing 5, or slides out of the inner receiving section 41 based on its resilience when the webbing 5 is unconstrained. Because a pin 8 is provided in the first embodiment of this disclosure for providing support for the clamping-elastic element 3 between the release and clamping positions, and this pin 8 partially overlaps the arched portion 214 in cross-section, therefore... Figure 5 and Figure 6 Only a portion of the arch bend 214 is visible in the image. For a more complete view of the arch bend 214 structure, please refer to the second embodiment involving the absence of the pin 8. Figure 11 and Figure 12 .

[0096] The design of the first opening portion 3D of the clamping-elastic element 3 is also important for the clamping and resetting effect of the clamping-elastic element 3. The first opening portion 3D of the clamping-elastic element 3 is designed such that when the clamping-elastic element 3 is under force, the portions at both ends of the first opening portion 3D abut against each other and thus the first opening portion 3D is completely closed. This allows the clamping-elastic element 3 to at least partially clamp the webbing 5 with its front end face 3C, and to at least partially retain its rear portion 32 in the outer receiving section 42 of the receiving structure 4. When the clamping-elastic element 3 is in a decompression state, it can reset to the release position based on the rebound force when the webbing 5 is unrestrained. The design of the first opening portion 3D affects the degree to which the clamping-elastic element 3 enters the inner receiving section 41. By designing the first opening portion 3D according to the present disclosure, in the clamping position of the clamping-elastic element 3, when the first opening portion 3D is fully closed, the center of the arcuate section 3E of the compression structure 310 of the clamping-elastic element 3 can extend into the inner receiving section 41 of the receiving structure 4, while at least a rear portion of the arcuate section 3E of the compression structure 310 of the clamping-elastic element 3 remains in the outer receiving section 42 of the receiving structure 4.

[0097] To achieve pre-tightening of the clamping-elastic element 3 in the release position, the dimensions of the receiving structure 4 in the outer receiving section 42 and the dimensions of the clamping-elastic element 3 in the rear section 32 are designed such that the clamping-elastic element 3 is received in the receiving structure 4 in a pre-tightened state in the release position. Therefore, as... Figure 5 and Figure 6As can be seen, in the turning section 21, a hook bend 215 is provided at the outer edge of the receiving structure 4, especially the outer receiving section 42, and the two legs 3F of the rear section 32 of the clamping-elastic element 3 are stopped at the hook bend 215 in the release position.

[0098] To prevent over-clamping of the clamping-elastic element 3, a rod-shaped pin 8 is provided in the turning section 21. The pin 8 is configured to provide support for the compression structure 310 of the clamping-elastic element 3 between the release and clamping positions, and to limit over-clamping by restricting the position of the compression structure 310 of the clamping-elastic element 3 when the force on the webbing 5 increases excessively. The pin 8 can be inserted into and interference-fitted with a mounting hole 8A provided on the side of the turning section 21 of the latch body 2. This mounting hole 8A allows for... Figure 1 and 2 This can be seen from it. For example... Figures 3 to 6 As shown, the pin 8 is arranged in the turning section 21 such that the compression structure 310 of the clamping-elastic element 3, in the released position, at least partially abuts against the pin 8 with its arcuate section 3E, and thus the pin 8 is at least partially engaged in the arcuate section 3E of the compression structure 310 of the clamping-elastic element 3. For example, the compression structure 310 of the clamping-elastic element 3 can abut against the pin 8 with the center portion of its arcuate section 3E in the released position. Furthermore, the pin 8 is constructed to project outward relative to the first receiving surface 4A of the receiving structure 4 when viewed in a side projection. Thus, with the pin 8, the clamping-elastic element 3 reaches its clamping position earlier than without the pin 8. In this embodiment, the pin 8 has a circular cross-sectional shape. In other embodiments, the pin 8 may also have an elliptical or oval cross-sectional shape.

[0099] To increase the elasticity of the clamping-elastic element 3, such as Figures 3 to 6 As shown, an additional elastic element 7 can be provided inside the clamping-elastic element 3. Figure 4 and Figure 6 As shown, the cross-sectional shape of the elastic element 7 substantially corresponds to the cross-sectional shape of the interior of the clamping-elastic element 3 in the clamping position. Here, the cross-sectional shape of the elastic element 7 may deviate from the cross-sectional shape of the interior of the clamping-elastic element 3 by less than 10%, preferably 20%. The elastic element 7 and the clamping-elastic element 3 are integrally constructed, for example, by plastic coating. The elastic element 7 is made of rubber or plastic.

[0100] In order to better withstand the force transmitted on the webbing 5 and to avoid wear on the webbing 5 after repeated use, the edge of the clamping elastic element 3 that contacts the webbing 5 is provided with a chamfer.

[0101] exist Figure 7 and Figure 8 The structure of the clamping-elastic element 3 and its additional elastic element 7 can be better seen in the image. The chamfered edge of the clamping-elastic element 3 that contacts the webbing 5, i.e., the front edge with the front end face 3C, can be seen. Furthermore, the opening portion 3D of the clamping-elastic element 3, the flat second surface 3B, and the first surface 3A, along with the arcuate section 3E, the support leg 3F, and the additional elastic element 7 housed within the clamping-elastic element 3, can also be seen.

[0102] The following uses Figures 9 to 12 The structure of the locking bolt 1 according to the second embodiment of this disclosure is described. Compared with the first embodiment, the locking bolt 1 according to the second embodiment does not have a pin 8. In other respects, the locking bolt 1 according to the first embodiment and the locking bolt 1 according to the second embodiment are substantially the same, so reference can be made here to the description of the other components except for the pin 8.

[0103] like Figure 10 and Figure 12 As shown, without the pin 8, the clamping-elastic element 3 can essentially completely clamp the webbing 5 onto the lower surface 212B of the through opening 212. This is in contrast to the first embodiment. Figure 4 and Figure 6 And related to the second embodiment Figure 10 and Figure 12 The difference between the two, with and without pin 8, can be seen more clearly.

[0104] Next, using Figure 13 The structure of the locking tongue 1 according to the third embodiment of this disclosure is described. For example... Figure 13 As shown, in the third embodiment, the compression structure 310' of the clamping-elastic element 3' of the locking tongue 1 is configured to have a generally V-shaped form in the released position. This is achieved through the combined action of the clamping-elastic element 3' itself and the corresponding cross-sectional geometry of the receiving structure 4'. Figure 13 As shown, in the released position, the second surface 3B' of the clamping-elastic element 3' may not initially be in contact with the second receiving surface 4B' of the receiving structure 4'. Contact between the second surface 3B' of the clamping-elastic element 3' and the second receiving surface 4B' of the receiving structure 4' can occur in an intermediate position between the released and clamped positions, or it can occur in the clamped position. For other aspects, refer to the description of the first and second embodiments of the locking bolt 1.

[0105] Then with Figures 14 to 18 The structure of the locking tongue 1 according to the fourth embodiment of this disclosure is described. Figure 15In the fourth embodiment shown, the clamping elastic element 3” of the locking tongue 1 is in the released position, while Figure 16 The clamping elastic element 3” shown is in the clamping position.

[0106] Unlike the clamping elastic element of the locking tongue 1 in the first to third embodiments, in the locking tongue 1 of the fourth embodiment, the clamping elastic element 3” may have an expansion structure 320” that can be expanded. The expansion structure 320” in the release position is configured to generate elastic potential energy in the clamping position due to the expansion of the expansion structure 320” of the clamping elastic element 3” by the receiving structure 4”, so that when the webbing 5 is unconstrained, the clamping elastic element 3” returns to the release position from the clamping position based on the rebound force caused by the elastic potential energy of the expansion structure 320”. In order to expand the expansion structure 320” to generate a rebound force, as viewed in the side projection, the receiving structure 4” of the locking tongue 1 of the fourth embodiment has a fitting portion 430” that can be embedded into the expansion structure 320” of the clamping-elastic element 3” and has a cross-sectional geometry that matches the cross-sectional geometry of the expansion structure 320” of the clamping-elastic element 3” so that the clamping-elastic element 3” can clamp the webbing in the clamping position and also generate elastic potential energy for resetting based on the expansion of the expansion structure 320”.

[0107] The expansion structure 320” of the clamping-elastic element 3” includes a second opening portion 3G”, which opens substantially inward. Here, “inward” means in the insertion direction of the clamping-elastic element 3”. The expansion structure 320” of the clamping-elastic element 3” is configured to have a V-shaped cross-sectional geometry in the release position. This V-shaped cross-sectional geometry also opens inward. Figures 14 to 18 As can be clearly seen, the expansion structure 320" includes elastic arms 3H" extending laterally from the body of the clamping-elastic element 3". Two elastic arms 3H" are constructed here. These two elastic arms 3H" are constructed in pairs and symmetrically about the center plane of the clamping-elastic element 3". In other embodiments, only one elastic arm 3H" may be constructed. This single elastic arm 3H" is preferably located on the center plane of the clamping-elastic element 3". In other embodiments, two or more elastic arms 3H" may be constructed. Of the two or more elastic arms 3H", preferably an even number, they may be constructed in pairs and symmetrically about the center plane of the clamping-elastic element 3. To obtain an appropriate restoring force that returns the clamping-elastic element 3" to the released position, the magnitude of the restoring force of the expansion structure 320" can be adjusted by lengthening or shortening the length of the elastic arms 3H".

[0108] In addition to the elastic arm 3H”, the expansion structure 320” may also be provided with other forms of extended spring structure, such as an elastic strip extending on a larger part of the clamping-elastic element 3”.

[0109] The engaging portion 430” is configured with a substantially wedge-shaped form. The clamping-elastic element 3” and the receiving structure 4” cooperate with each other such that, in the released position, the expansion structure 320” is at least partially engaged by the engaging portion 430” of the receiving structure 4” in a pre-tightened state. The second opening portion 3G” can further open as it moves from the released position to the clamping position with the engagement of the engaging portion 430” of the receiving structure 4”. As a result, the expansion structure 320” also further opens with the engagement of the engaging portion 430” of the receiving structure 4” and thus generates a greater restoring force.

[0110] In addition, such as Figures 14 to 16 As shown, the clamping-elastic element 3”, in addition to the expansion structure 320”, also has a guide structure 330” composed of the main body of the clamping-elastic element 3”. The guide structure 330” is configured to guide the clamping-elastic element 3” during movement between the clamping position and the release position. For this purpose, the receiving structure 4” includes a second groove 420” for guiding the guide structure 330” of the clamping-elastic element 3”, the second groove 420” being respectively provided beside the two ends of the through opening in the turning section. The engaging portion 430” of the receiving structure 4” is provided between the second grooves 420”.

[0111] The elastic arm 3H” is expanded, i.e., pre-tightened, in the released position when installed. In the clamped position, the clamping elastic element 3” can move upward along the lateral second groove 420” to a position near the upper edge. Due to the constraint of the interlocking portion 430” on the latch body 2, the end region of the elastic arm 3H” is further stretched, increasing the elastic potential energy. When the force on the webbing 5 decreases, the restoring force causes the clamping elastic element 3” to return to the released position along the second groove 420”, and the elastic arm 3H” resets simultaneously.

[0112] like Figure 15 and Figure 16 As shown, the upper surface 420A” and the lower surface 420B” of the second groove 420” are constructed to be substantially parallel to each other. The friction between the guide structure 330” of the clamping-elastic element 3” and the locking tongue body 2 can be adjusted by adjusting the gap d between the upper surface 420A” and the lower surface 420B” of the second groove 420”.

[0113] In embodiments not shown, the clamping-elastic element may also simultaneously have a compressible compression structure and an expandable expansion structure. The compression and expansion structures are respectively configured to generate elastic potential energy in the clamped position due to compression of the compression structure of the clamping-elastic element by the webbing and expansion of the expansion structure of the clamping-elastic element by the receiving structure, such that in the unconstrained state of the webbing, the clamping-elastic element returns to the released position from the clamped position based on the rebound force caused by the elastic potential energy of the compression and expansion structures. The compression and expansion structures can be constructed as described above. The compression structure can be constructed at the lower part of the clamping-elastic element, while the expansion structure can be constructed at the upper part. The compression and expansion structures can also be integrally constructed.

[0114] It should be noted that the terminology used herein is for illustrative purposes only and is not intended to limit the scope of the invention. The singular forms “a” and “the one” as used herein should include the plural forms unless the context clearly indicates otherwise. It is understood that the terms “comprising” and “including,” and other similar terms, when used in the application documents, specifically describe the presence of the stated operations, elements, and / or components, without excluding the presence or addition of one or more other operations, elements, components, and / or combinations thereof. The term “and / or” as used herein includes all arbitrary combinations of one or more of the associated listed items. In the description of the drawings, similar reference numerals always denote similar elements.

[0115] The thickness of the elements in the accompanying drawings may be exaggerated for clarity. It is also understood that if an element is described as being on, coupled to, or connected to another element, then the element may be directly formed on, coupled to, or connected to the other element, or there may be one or more intermediate elements between them. Conversely, if the expressions "directly on," "directly coupled to," and "directly connected to" are used herein, it indicates that there is no intermediate element. Other terms used to describe relationships between elements should be interpreted similarly, such as "between" and "directly between," "attached" and "directly attached," "adjacent" and "directly adjacent," etc.

[0116] Terms such as “top,” “bottom,” “above,” “below,” “over,” “under,” etc., are used to describe the relationship of one element, layer, or region relative to another element, layer, or region, as shown in the accompanying drawings. It is understood that these terms should also encompass other orientations of the device in addition to those described in the accompanying drawings.

[0117] It is understood that although the terms "first," "second," etc., may be used herein to describe different elements, these elements should not be limited by these terms. These terms are merely used to distinguish one element from another. Thus, a first element may be referred to as a second element without departing from the teachings of this disclosure.

[0118] It can also be considered that all the exemplary embodiments disclosed herein can be arbitrarily combined with each other. Furthermore, all individual technical features in this application can be arbitrarily combined with each other, as long as the combined technical features are not contradictory. All technically feasible combinations of features are the technical content described in this application.

[0119] Finally, it should be noted that the above embodiments are merely for understanding this disclosure and do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art can make modifications based on the above embodiments, and these modifications will not depart from the scope of protection of this disclosure.

Claims

1. A locking bolt (1) for a seat belt, the locking bolt comprising a bolt body (2) having a locking section (22) configured for insertion into a seat belt latch and a turning section (21) configured for turning a webbing (5) of the seat belt, the turning section having a through opening (212) for the webbing to pass through, characterized in that, A clamping-elastic element (3, 3', 3") is provided on the turning section. The clamping-elastic element is movable between a release position and a clamping position. In the release position, the webbing is free to move. In the clamping position, the webbing is clamped between the clamping-elastic element and a lower surface (212B) of a through opening configured to clamp the webbing together with the clamping-elastic element. The clamping-elastic element is configured to return from the clamping position to the release position by its own rebound force when the webbing is unconstrained.

2. The locking tongue according to claim 1, characterized in that, The turning section has receiving structures (4, 4', 4") for receiving a clamping-elastic element, the receiving structures being configured to allow the clamping-elastic element to move in a guided manner at the receiving structures, and the receiving structures cooperating with the clamping-elastic element such that, in the unconstrained state of the webbing, the clamping-elastic element is guided to return to the release position based on its own rebound force.

3. The locking tongue according to claim 2, characterized in that, The clamping-elastic element (3, 3') has a compressible compression structure (310, 310') configured to generate elastic potential energy in the clamped position due to the compression of the compression structure of the clamping-elastic element by the webbing, such that in the unconstrained state of the webbing, the clamping-elastic element is reset from the clamped position to the released position based on the rebound force caused by the elastic potential energy of the compression structure. and / or Viewed in side projection, the receiving structure has a cross-sectional geometry that interacts with the cross-sectional geometry of the compression structure of the clamping-elastic element in such a way that, in the clamping position, the clamping-elastic element can both clamp the webbing and generate elastic potential energy for repositioning based on the compression of the compression structure; and / or Viewed in side projection, the compression structure of the clamping-elastic element has a first surface (3A) facing the webbing that is being turned in the installed state and a second surface (3B) facing away from the webbing that is being turned. The receiving structure accordingly has a lower first receiving surface (4A) for contacting and engaging with the first surface and an upper second receiving surface (4B) for contacting and engaging with the second surface. The first and second receiving surfaces are configured relative to each other such that the clamping-elastic element will not be stuck in the receiving structure under the action of the rebound force in the clamped position and can be reset to the release position in the unconstrained state of the webbing. and / or The second surface of the compression structure of the clamping-elastic element and the second receiving surface of the receiving structure are configured such that the second surface of the compression structure of the clamping-elastic element can fit against the second receiving surface of the receiving structure and is flat in the fitting area, so that when the clamping-elastic element moves between the release position and the clamping position, the second surface of the compression structure of the clamping-elastic element can slide along the second receiving surface of the receiving structure. and / or The first receiving surface is constructed with a curve and the second receiving surface is flat, or both the first receiving surface and the second receiving surface are flat. and / or Viewed from the side projection, the cross-sectional geometry of the receiving structure gradually or in a stepped manner narrows from the outside to the inside; and / or The compression structure of the clamping-elastic element includes a front section (31) located at the front and a rear section (32) located at the rear in the insertion direction of the clamping-elastic element. The rear section includes a first opening (3D) at a rear end opposite to the front end face (3C) for clamping the webbing. The first opening is substantially outwardly oriented and is capable of at least partially closing during the movement of the clamping-elastic element from a release position to a clamping position, so that the compression structure of the clamping-elastic element is compressed and thereby generates elastic potential energy; and / or The compression structure of the clamping-elastic element is configured to have a V-shaped or C-shaped cross-sectional geometry in the release position; and / or Viewed in a side projection, the first surface of the compression structure of the clamping-elastic element is concave towards the interior of the compression structure of the clamping-elastic element and is configured with an arc shape; and / or Viewed in a lateral projection, the clamping-elastic element is configured to have an L-shaped cross-sectional profile in the release position, and the receiving structure accordingly has an L-shaped cross-sectional shape corresponding to the L-shaped cross-sectional profile of the clamping-elastic element and has an inner receiving section (41) and an outer receiving section (42), wherein, at least in the release position, the front section of the clamping-elastic element is received in the inner receiving section of the receiving structure, while the rear section of the clamping-elastic element is received in the outer receiving section of the receiving structure; and / or Inside the curved region of the L-shaped cross-section of the receiving structure, the turning section has an arched portion configured to allow the clamping-elastic element to slide along its arc-shaped first surface as it moves between a release position and a clamping position, so that the clamping-elastic element slides into the inner receiving section of the receiving structure when clamping the webbing or slides out of the inner receiving section based on its resilience when the webbing is unconstrained; and / or The first opening portion of the clamping-elastic element is designed such that when the clamping-elastic element is under force, the portions at both ends of the first opening portion abut against each other, thus completely closing the first opening portion. This allows the clamping-elastic element to at least partially clamp the webbing with its front end face while its rear portion remains at least partially within the outer receiving section of the receiving structure. When the clamping-elastic element is in a decompression state, it can return to the release position based on its rebound force when the webbing is unrestrained; and / or In the clamping position of the clamping-elastic element, with the first opening fully closed, the center of the arc-shaped section (3E) of the compression structure of the clamping-elastic element can extend into the inner receiving section of the receiving structure, while at least a rear portion of the arc-shaped section of the compression structure of the clamping-elastic element remains in the outer receiving section of the receiving structure; and / or The dimensions of the receiving structure in the outer receiving section and the dimensions of the compression structure of the clamping-elastic element in the rear section are designed such that the clamping-elastic element is received in the receiving structure in a pre-tightened state in the released position; and / or In the turning section, a hook bend (3F) is provided at the outer edge of the receiving structure, and the two legs of the rear section of the clamping-elastic element can be stopped at the hook bend in the release position.

4. The locking tongue according to claim 3, characterized in that, A rod-shaped pin (8) is provided in the steering section, the pin (8) being configured to provide support for the compression structure of the clamping-elastic element between the release position and the clamping position, and to limit over-clamping by restricting the position of the compression structure of the clamping-elastic element when the force on the webbing rises excessively; and / or The pin can be inserted through a mounting hole (8A) on the side of the turning section of the latch body and is interference-fitted with the mounting hole; and / or The pin has a circular, elliptical, or oval cross-sectional shape; and / or The pin is arranged in the steering section such that the compression structure of the clamping-elastic element at least partially abuts against the pin with its arcuate section in the released position, and thus the pin at least partially engages in the arcuate section of the compression structure of the clamping-elastic element. and / or The compression structure of the clamping-elastic element rests against the pin in the released position with the central portion of its arc-shaped segment; and / or The pin is constructed to project outward relative to the first receiving surface of the receiving structure when viewed in a lateral projection, thereby enabling the clamping-elastic element to reach its clamping position earlier when the pin is present compared to when the pin is absent.

5. The locking tongue according to claim 1, characterized in that, The clamping-elastic element is made of metal or plastic with spring elasticity.

6. The locking tongue according to claim 3, characterized in that, An additional elastic element (7) is provided inside the clamping-elastic element to increase the elasticity of the clamping-elastic element; and / or The cross-sectional shape of the elastic element corresponds to the cross-sectional shape of the interior of the clamping elastic element in the clamping position; and / or The elastic element is made of rubber or plastic; and / or The elastic element and the clamping-elastic element are constructed as a single unit.

7. The locking tongue according to claim 3, characterized in that, The receiving structure includes first grooves (410) for compressing the structure, respectively disposed at both ends of the through opening in the turning section; and / or The first receiving surface (4A) of the receiving structure (4) for the compression structure is formed by the lower surface (410B) of the first groove (410), while the second receiving surface (4B) of the receiving structure (4) for the compression structure is formed by the upper surface (410A) of the first groove (410) and / or the upper surface (212A) of the through opening (212); and / or When the second receiving surface of the receiving structure used for the compression structure is simultaneously formed by the upper surface of the first groove and the upper surface of the through opening, the upper surface of the first groove and the upper surface of the through opening are flush when viewed from the side; and / or The upper surface of the through opening and the lower surface of the through opening extend at an acute angle to each other.

8. The locking tongue according to claim 2, characterized in that, The clamping-elastic element (3”) has an expandable expansion structure (320”) configured to generate elastic potential energy in the clamped position due to the expansion of the expansion structure of the receiving structure, such that in the unconstrained state of the webbing, the clamping-elastic element returns from the clamped position to the released position based on the rebound force caused by the elastic potential energy of the expansion structure; and / or Viewed in side projection, the receiving structure (4”) has an insert (430”) that can be embedded into the expansion structure of the clamping-elastic element and has a cross-sectional geometry that matches the cross-sectional geometry of the expansion structure of the clamping-elastic element in such a way that the clamping-elastic element, in the clamping position, can clamp the webbing on the one hand, and on the other hand, generate elastic potential energy for repositioning based on the expansion of the expansion structure; and / or The expansion structure includes a second opening portion (3G”) that opens substantially inward and is configured to further open as the receiving structure engages during movement from the release position to the clamping position. and / or The expansion structure of the clamping-elastic element is configured to have a V-shaped cross-sectional geometry in the release position; and / or The interlocking portion is configured with a substantially wedge-shaped shape; and / or The expansion structure includes at least one elastic arm (3H”) extending laterally from the body of the clamping-elastic element; and / or The structure comprises two or more elastic arms, at least a portion of which are paired and symmetrically configured about the central face of the clamping-elastic element; and / or The magnitude of the rebound force of the expansion structure can be adjusted by lengthening or shortening the elastic arm; and / or In addition to the expansion structure, the clamping-elastic element also has a guide structure (330”) formed by the body of the clamping-elastic element, the guide structure being configured to guide the clamping-elastic element during movement between the clamping position and the release position; and / or The receiving structure includes a second groove (420”) for guiding the clamping-elastic element, the second groove being respectively disposed beside the two ends of the through opening in the turning section; and / or The upper and lower surfaces of the second groove are constructed to be substantially parallel to each other; and / or The friction between the guide structure of the clamping-elastic element and the latch body can be adjusted by adjusting the gap (d) between the upper surface (420A”) and the lower surface (420B”) of the second groove; and / or The receiving structure's interlocking portion is disposed between each of the second slots; and / or The clamping-elastic element and the receiving structure cooperate with each other such that, in the released position, the expansion structure is at least partially embedded by the interlocking portion of the receiving structure in the pre-tightened state.

9. The locking tongue according to claim 1, characterized in that, The edge of the clamping-elastic element that contacts the webbing is chamfered; and / or A single clamping-elastic element is configured to simultaneously achieve clamping and resetting functions.

10. A seat belt device for a motor vehicle, the seat belt device comprising webbing, characterized in that, The seat belt device includes a locking latch for a seat belt according to any one of claims 1 to 9, the locking latch being capable of locking onto the webbing in an emergency.

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