Adaptively adjustable lock tongue

Abstract

The application provides a self-adaptive adjustment type lock tongue applied to the technical field of vehicle seat safety belt components, wherein when the vehicle is normally used, the pin shaft is kept in the first position of the pin hole through the retaining part of the pin hole, and the relative rotation of the insertion sheet and the lock tongue body is limited through the limiting part; when the vehicle is in a collision, the passenger posture and angle change drives the safety belt posture to change, the pin shaft breaks through the retaining part and moves out of the first position through the pulling force of the safety belt to make the limiting part release the limitation, the lock tongue body can be relatively rotated with the insertion sheet to adaptively adjust the posture change, so that the braid is always in a smooth passing state with the belt hole on the lock tongue body, the braid is not easy to accumulate and jam, and the braid is not easy to be cut, and better safety protection can be provided for passengers.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle seat belt assemblies, and in particular to an adaptively adjustable lock tongue. Background Art

[0002] The seatbelt tongue is a component installed in the seatbelt buckle of a vehicle. Its primary function is to ensure that the seatbelt is securely fastened to the body after the passenger or driver has fastened it, preventing safety hazards caused by not wearing the seatbelt or the belt coming loose. When the seatbelt is withdrawn for use, the tongue automatically locks the belt, preventing it from accidentally retracting in the event of a sudden stop or collision, thus providing passenger safety.

[0003] There is a seat belt lock tongue in the related technology. In the event of a vehicle collision, the occupant will move or change posture, and the seat belt will change accordingly with the occupant. At this time, the seat belt is easily stuck in the belt hole of the seat belt lock tongue, causing the webbing to accumulate, and even dangerous situations such as the webbing being stuck or cut.

[0004] Based on this, a new technical solution is needed. Summary of the Invention

[0005] In view of this, the present application provides a self-adaptive adjustable lock tongue.

[0006] This application provides the following technical solutions:

[0007] According to the present application, an adaptively adjustable lock tongue is provided, comprising a lock tongue body, an insert and a pin shaft; the lock tongue body has a belt hole for passing a safety belt, and the insert piece is used to cooperate with a lock buckle for locking; the pin shaft is fixed to one of the lock tongue body and the insert piece, and the pin shaft can slide through the pin hole of the other of the lock tongue body and the insert piece; the pin hole has a retaining portion to keep the pin shaft in a first position of the pin hole, the insert piece and / or the lock tongue body is provided with a limiting portion, the limiting portion limits the relative rotation of the insert piece and the lock tongue body at the first position, and the limiting portion releases the restriction after the pin shaft breaks through the retaining portion and moves out of the first position due to the pulling force of the safety belt. Preferably, the lock tongue body includes a tongue plate portion and a plastic-coated portion, the uncoated portion of the tongue plate portion forms an installation area stacked with part of the insert, the pin shaft and / or pin hole are arranged in the installation area, the limiting portion includes a limiting end face formed at the end of the plastic-coated portion and a limiting base formed at the end of the insert close to the plastic-coated portion, the limiting end face cooperates with the limiting base to limit when the pin shaft is in the first position, and the limiting end face separates from the limiting base after the pin shaft moves out of the first position.

[0008] Preferably, the limiting end surface further includes a groove, and the limiting base further includes a protrusion engaged with the groove, and the recessed direction of the groove is parallel to the extending direction of the pin hole.

[0009] Preferably, the extension direction of the pin hole coincides with the axis of the lock tongue body and / or the insert, the limiting base has a circular contour, the protrusion is located at the end of the insert away from the lock buckle and extends outward; the end of the insert close to the overmolded portion matches the end contour of the overmolded portion.

[0010] Preferably, the end contour of the protrusion facing away from the lock buckle and the end contours on both sides of the protrusion on the insert are arc contours with the same center, so that the protrusion can slide in cooperation with the end contours on both sides of the groove on the overmolded part when the pin shaft and the lock tongue body rotate relative to each other.

[0011] Preferably, the insert is provided with a fixing hole for the pin to be inserted, and the pin hole is located on the lock tongue body;

[0012] Both ends of the pin shaft are provided with fixing parts, the pin shaft is inserted into the fixing hole and the pin hole, and the two fixing parts respectively abut against the surfaces of the lock tongue body and the inserting piece which are away from each other.

[0013] Preferably, the pin hole includes a locking hole portion and a rotating hole portion arranged along the extension direction of the pin hole, the first position corresponds to the locking hole portion, the locking hole portion is connected to the position of the rotating hole portion facing away from the limiting portion, and the retaining portion is a relative protrusion formed between the locking hole portion and the rotating hole portion; the pin shaft is adapted to be inserted into the locking hole portion.

[0014] Preferably, the length of the pin hole is less than twice the diameter of the pin shaft.

[0015] Preferably, a bushing is installed on the lock tongue body by forming a sleeve hole, and the bushing includes a sleeve body and an abutment portion, and the abutment portion is arranged around one end of the circumferential side wall of the sleeve body; the sleeve body is inserted into the sleeve hole so that the abutment portion abuts against the surface of the lock tongue body facing away from the insert piece, and the pin hole passes through the sleeve body along the insertion direction of the sleeve body.

[0016] Preferably, a gasket is sandwiched between the insert and the lock tongue body, and the gasket is provided with a plate hole around the pin hole, and the pin shaft is inserted through the plate hole.

[0017] Preferably, the belt hole is a flat hole, and the extending direction of the pin hole is perpendicular to the flat direction of the flat hole.

[0018] Compared with the prior art, the at least one technical solution adopted in this application can achieve the following beneficial effects:

[0019] When the lock tongue of the present application is in normal use in the vehicle, the pin shaft is maintained in the first position of the pin hole by the retaining portion of the pin hole, and the relative rotation of the insert and the lock tongue body is restricted by the limiting portion. When the vehicle collides, the change in the occupant's posture and angle drives the change in the seat belt posture. The pin shaft breaks through the retaining portion and moves out of the first position due to the tension of the seat belt to release the restriction of the limiting portion. The lock tongue body can adaptively adjust to the relative rotation of the insert following the change in the posture of the seat belt, so that the seat belt webbing is always in a smooth penetration state with the belt hole on the lock tongue body, and it is not easy for the webbing to accumulate or get stuck, and it is not easy to cut the webbing, which can provide better safety protection for the passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of the self-adaptive adjustable lock tongue of the present application;

[0022] Figure 2 It is an exploded schematic diagram of the self-adaptive lock tongue of the present application;

[0023] Figure 3 This is a schematic diagram of the occupant wearing the seat belt normally (initial state) in this application;

[0024] Figure 4 It is a front view of the self-adaptive lock tongue in the present application in the initial state;

[0025] Figure 5 It is a back view of the self-adaptive lock tongue in the present application in the initial state;

[0026] Figure 6 Schematic diagram of the seat belt wearing state (stressed and stretched state) at the initial stage of a vehicle collision in this application;

[0027] Figure 7 It is a front view of the self-adaptive lock tongue in the present application in a stressed and stretched state;

[0028] Figure 8 It is a back view of the self-adaptive lock tongue in the present application in a stressed and stretched state;

[0029] Figure 9 It is a schematic diagram of the lock tongue body in this application;

[0030] Figure 10 This is a schematic diagram of the seat belt wearing state (adaptive angle adjustment state) in the late stage of a vehicle collision in this application;

[0031] Figure 11 It is a front view of the self-adaptive lock tongue in the present application in a self-adaptive angle adjustment state;

[0032] Figure 12 This is a back view of the self-adaptive lock tongue in the present application in a self-adaptive angle adjustment state;

[0033] Figure 13 This is a schematic diagram of the installation of the self-adaptive adjustable lock tongue in this application.

[0034] Figure numerals: 1. Lock tongue body; 101. Plastic-coated part; 102. Tongue plate part; 2. Insert; 3. Bushing; 4. Gasket; 5. Rivet; 501. Pin shaft; 502. Fixing part; 6. Safety belt; 7. Lock buckle; 8. Pin hole; 801. First position; 802. Second position; 9. Limiting part; 901. Protrusion; 902. Groove. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0036] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0037] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0038] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0039] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0040] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0041] The embodiment of this specification proposes an adaptive adjustment type lock tongue, such as Figure 1 、 Figure 2 as well as Figure 3 As shown, the invention comprises a lock tongue body 1, an insert 2, and a pin 501. The lock tongue body 1 has a belt hole for passing the safety belt 6, and the insert 2 is used to lock with the buckle 7. The pin 501 is fixed to one of the lock tongue body 1 and the insert 2 and can slide through the pin hole 8 of the other of the two. The pin hole 8 has a retaining portion to maintain the pin 501 in the first position 801 of the pin hole 8. The insert 2 and / or the lock tongue body 1 are characterized by a stopper 9. The stopper 9 restricts the relative rotation of the insert 2 and the lock tongue body 1 in the first position 801. The stopper 9 releases the restriction after the pin 501 breaks through the retaining portion and moves out of the first position 801 due to the tension of the safety belt 6. The position of the pin 501 in the pin hole 8 after moving out of the first position 801 can serve as the second position 802. The safety belt 6 is, for example, a webbing.

[0042] In one embodiment, if Figure 1 and Figure 2 As shown, the lock bolt body 1 includes a tongue plate portion 102 and a plastic-coated portion 101. The plastic-coated portion 101 partially covers the tongue plate portion 102. The uncoated portion of the tongue plate portion 102 forms an installation area that is stacked with a portion of the insert 2. The pin 501 and / or the pin hole 8 are provided in the installation area. The limiting portion 9 includes a limiting end surface formed at the end of the plastic-coated portion 101 and a limiting base formed at the end of the insert 2 adjacent to the plastic-coated portion 101. The limiting end surface cooperates with the limiting base to limit the position when the pin 501 is in the first position 801. The limiting end surface separates from the limiting base after the pin 501 moves out of the first position 801. For example, the end surface profile of the limiting end surface can be an elliptical arc profile, etc.

[0043] In one embodiment, if Figure 1 and Figure 2As shown, the limiting end surface further includes a groove 902 , and the limiting base further includes a protrusion 902 engaged with the groove 902 ; the recessed direction of the groove 902 is parallel to the extending direction of the pin hole 8 .

[0044] In one embodiment, Figure 2 and Figure 3 As shown, the extension direction of the pin hole 8 coincides with the axis of the lock tongue body 1 and / or the insert 2. The limiting base has a circular profile. The protrusion 902 is located at the end of the insert 2 away from the lock catch 7 and extends outward. The end of the insert 2 near the overmolded portion 101 matches the end profile of the overmolded portion 101 to improve the stability of the limiter 9. The axis of the lock tongue body 1 and / or the insert 2 can be their respective vertical centerlines. When the pin shaft 501 is in the first position 801, the axis of the lock tongue body 1 and the insert 2 coincide.

[0045] In one embodiment, Figure 1 and Figure 2 As shown, the insert 2 is provided with a fixing hole for inserting a pin 501, and the pin hole 8 is located on the lock body 1. The pin 501 is provided with fixing portions 502 at both ends. The pin 501 is inserted through the fixing hole and the pin hole 8, and the two fixing portions 502 respectively abut the mutually facing surfaces of the lock body 1 and the insert 2. The pin 501 and the fixing portions 502 at both ends can be formed by rivets 5.

[0046] In one embodiment, Figure 1 and Figure 2 As shown, the pin hole 8 includes a locking hole portion and a rotating hole portion arranged along the extension direction of the pin hole 8. The first position 801 corresponds to the locking hole portion. The locking hole portion is connected to the position of the rotating hole portion facing away from the limiting portion 9, and the retaining portion is a relative protrusion formed between the locking hole portion and the rotating hole portion. The pin shaft 501 is adapted to be plugged into the locking hole portion. For example, the pin shaft 501 and the locking hole portion are transitionally matched, and the pin shaft 501 and the rotating hole portion are transitionally or clearance-matched. The second position 802 corresponds to the rotating hole portion. The locking hole portion is composed of an upper circular hole, which serves as the upper mounting hole position of the pin hole 8; the rotating hole portion is composed of a lower circular hole, which serves as the lower mounting hole position of the pin hole 8.

[0047] In one embodiment, Figure 2 As shown, the extension length of the pin hole 8 is less than 2 times the diameter of the pin shaft 501, so that the pin hole 8 can be formed into a gourd shape, which makes it easy for the pin shaft 501 to break through the retaining portion and move out of the first position.

[0048] In one embodiment, Figure 1 and Figure 2 As shown, a bushing 3 is installed on the lock tongue body 1 by forming a sleeve hole. The bushing 3 includes a sleeve body and an abutment portion, and the abutment portion is arranged around one end of the circumferential side wall of the sleeve body; the sleeve body is inserted into the sleeve hole so that the abutment portion abuts against the surface of the lock tongue body 1 facing away from the inserting piece 2, and the pin hole 8 passes through the sleeve body along the insertion direction of the sleeve body.

[0049] In one embodiment, Figure 1 and Figure 2 As shown, a gasket 4 is sandwiched between the insert 2 and the lock tongue body 1, and the gasket 4 is provided with a plate hole around the pin hole 8, and the pin shaft 501 is inserted through the plate 2 hole.

[0050] In one embodiment, Figure 1 and Figure 2 As shown, the belt hole is a flat hole, and the extending direction of the pin hole 8 is perpendicular to the flat direction of the flat hole.

[0051] This application is a self-adaptive lock tongue that is easy to assemble. Figure 13 As shown, it primarily consists of a tongue body 1, an insert 2, a gasket 4, a bushing 3, and a rivet 5. The bushing 3 snaps into the hole in the tongue body 1. The gasket 4 and insert 2 are then threaded through the rivet 5 to connect them, and finally riveted together using a riveting process. The tongue is used in conjunction with the seatbelt 6 and buckle 7 to lock the seatbelt. During normal use, the tongue behaves identically to a standard tongue. However, in the event of a collision, it switches to an adaptive angle adjustment, ensuring smooth webbing flow throughout the collision, preventing webbing accumulation and jamming.

[0052] In the normal use of the vehicle, when the occupant inserts and disengages the seat belt 6 lock tongue, this part is completely consistent with the existing conventional lock tongue, and there is no extra cumbersome and inconvenient action. However, in the event of a vehicle collision, this lock tongue can instantly switch to an adaptive angle adjustment lock tongue through its own structure and force conditions, so that the occupant can keep the webbing in a smooth penetration state in the middle and late stages of the vehicle collision, avoiding the accumulation of webbing, the occurrence of jamming or even the dangerous situation of webbing cutting.

[0053] Normal wearing and use Figure 3 、 Figure 4 as well as Figure 5 As shown, the molded groove 902 of the lock tongue body 1 and the insert 2 form an auxiliary limiting structure of the limiting portion 9, and the rivet 5 is installed in the locking hole of the bushing 3. Due to the connection of the rivet 5 and the common structural limiting cooperation of the molded lock tongue body 1 and the insert 2, it has no ability to adjust the angle in the initial state, that is, at this time, it is no different from the existing integrated lock tongue; in the early stage of a vehicle collision, the switching and situation of this part are as follows Figure 6 、 Figure 7 as well as Figure 8As shown, when the lock tongue body 1 is pulled out by force, the auxiliary limiting structure fails, and the rivet 5 slides down to the rotating hole of the bushing 3. At this time, the occupant has a tendency to move toward the front of the vehicle, but the occupant will be restrained on the seat under the action of the buckle 7 of the seat belt 6. However, the force on the belt will continue to increase. When it reaches a certain force value, the lock tongue body 1 will be pulled out a small distance, and its own limiting structure will fail at this time, and it will enter the adaptive angle adjustment stage. The switching principle and angle adjustment principle are as follows Figure 9 As shown, the structure of the bushing 3 is composed of upper and lower circular holes of unequal sizes. The diameter of the upper circular hole matches the diameter of the rivet 5. This hole is used in the normal stage, while the diameter of the lower circular hole is slightly larger than the upper circular hole. After switching, there is a certain gap between the rivet 5 and it, thereby realizing the rotation function, and there is a certain interference between the two circular holes. Only when the force value reaches a certain level can the rivet 5 break through the interference value, thereby realizing the function switching. The key force value for the rivet 5 to break through the interference value comes from the force applied to it by the webbing, and the force given by the vehicle collision can just become the motive force for its switching.

[0054] In the middle and late stages of a vehicle collision, the adaptive angle adjustment of this part is shown in the following figure. Figure 10 、 Figure 11 as well as Figure 12 As shown, in the middle and late stages of a collision, since the existing seat belts 6 basically have a force-limiting function, that is, after the force value reaches a certain amount, the seat belt retractor will gradually and steadily release the webbing inside it. This function is mainly used to reduce the injuries to the chest and waist of the occupants in the middle and late stages of a collision. During this process, the movement of the occupants will increase, and the posture of the occupants on the seat will change, that is, the occupants will move toward the front of the vehicle. At this time, the webbing will also change with the occupants at a corresponding angle. At this stage, the adaptive function will play a corresponding role, that is, it will adapt its own angle in conjunction with the angle change of the webbing, thereby ensuring that the webbing passes smoothly throughout the entire middle and late stages.

[0055] In this specification, the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments described later, the description is relatively simple, and the relevant parts can be referred to the partial description of the previous embodiments.

[0056] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An adaptively adjustable lock tongue, comprising a lock tongue body, an insert, and a pin; the lock tongue body having a belt hole for passing a seat belt, the insert being used to lock with a buckle; the pin being fixed to one of the lock tongue body and the insert, and being slidable through the pin hole of the other of the lock tongue body and the insert; the pin hole having a retaining portion for retaining the pin in a first position of the pin hole, characterized in that: The inserting piece and / or the lock tongue body are provided with a limiting portion, which limits the relative rotation of the inserting piece and the lock tongue body when the pin is in the first position, and the limiting portion releases the restriction after the pin breaks through the retaining portion and moves out of the first position due to the tension of the safety belt; The lock bolt body includes a tongue plate portion and a plastic-coated portion, wherein the uncoated portion of the tongue plate portion forms an installation area stacked with a portion of the insert, the pin shaft and / or the pin hole are arranged in the installation area, and the limiting portion includes a limiting end surface formed at an end of the plastic-coated portion and a limiting base formed at an end of the insert close to the plastic-coated portion, wherein the limiting end surface cooperates with the limiting base to limit the position when the pin shaft is in the first position, and the limiting end surface separates from the limiting base after the pin shaft moves out of the first position; The insert is provided with a fixing hole for the pin to be inserted, and the pin hole is located on the lock tongue body; both ends of the pin are provided with fixing parts, the pin is inserted through the fixing hole and the pin hole, and the two fixing parts respectively abut against the surfaces of the lock tongue body and the insert that are away from each other; The pin hole includes a locking hole portion and a rotating hole portion arranged along the extending direction of the pin hole, the first position corresponds to the locking hole portion, the locking hole portion is connected to a position of the rotating hole portion facing away from the limiting portion, and the retaining portion is a relative protrusion formed between the locking hole portion and the rotating hole portion; The pin shaft is adapted to be inserted into the locking hole portion.

2. The self-adaptive lock tongue according to claim 1, characterized in that: The limiting end surface further includes a groove, and the limiting base further includes a protrusion engaged with the groove, and the recessed direction of the groove is parallel to the extending direction of the pin hole.

3. The self-adaptive lock tongue according to claim 2, characterized in that: The extension direction of the pin hole coincides with the axis of the lock tongue body and / or the insert, the limiting base has a circular contour, the protrusion is located at the end of the insert away from the lock buckle and extends outward; the end of the insert close to the overmolded portion matches the end contour of the overmolded portion.

4. The self-adaptive lock tongue according to claim 1, characterized in that: The length of the pin hole is less than twice the diameter of the pin shaft.

5. The self-adaptive lock tongue according to claim 1, characterized in that: A bushing is installed on the lock tongue body by forming a sleeve hole, and the bushing includes a sleeve body and an abutment portion, and the abutment portion is arranged around one end of the circumferential side wall of the sleeve body; the sleeve body is inserted into the sleeve hole so that the abutment portion abuts against the surface of the lock tongue body facing away from the inserting piece, and the pin hole passes through the sleeve body along the insertion direction of the sleeve body.

6. The self-adaptive lock tongue according to claim 1, characterized in that: A gasket is sandwiched between the insert and the lock tongue body, and the gasket is provided with a plate hole around the pin hole, and the pin shaft is inserted through the plate hole.

7. The self-adaptive lock tongue according to any one of claims 1 to 3, characterized in that: The belt hole is a flat hole, and the extending direction of the pin hole is perpendicular to the flat direction of the flat hole.

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