Self-adaptive adjusting type spring bolt

Abstract

The invention provides a self-adaptive adjusting type spring bolt which is applied to the technical field of vehicle seat safety belt assemblies, when a vehicle is normally used, a pin shaft is kept at a first position of a pin hole through a keeping part of the pin hole, meanwhile, relative rotation of an inserting piece and a spring bolt body is limited through a limiting part, and when the vehicle collides, the pin shaft is kept at the first position of the pin hole. The posture and angle of a passenger change to drive the posture of the safety belt to change, the pin shaft breaks through the retaining part through the pulling force of the safety belt to move out of the first position so that the limiting part can relieve limitation, and the spring bolt body can rotate relative to the inserting piece along with the posture change of the safety belt to conduct self-adaptive adjustment. By means of the structure, the braid and the belt hole in the spring bolt body are in a smooth penetrating state all the time, the braid is not prone to being stacked and clamped, the braid is not prone to being cut off, and better safety guarantee 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 locking tongue. Background Art

[0002] The seat belt lock tongue is a component that can be installed in the car seat belt buckle. Its main function is to ensure that the seat belt can be firmly fixed to the body after the passenger or driver fastens the seat belt, avoiding safety hazards caused by not fastening the seat belt or the seat belt is loose. When the seat belt is pulled out for use, the lock tongue will automatically lock the seat belt to prevent it from accidentally retracting when the car stops suddenly or collides, thereby providing safety protection for passengers.

[0003] There is a seat belt lock tongue in the related technology. When a vehicle collides, the occupant will move or change his 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 even 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] An adaptively adjustable lock tongue provided according to the present application includes 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 is used to lock with a lock buckle; the pin shaft is fixed to one of the lock tongue body and the insert, and the pin shaft can slide through the pin hole of the other of the lock tongue body and the insert; the pin hole has a retaining portion to keep the pin shaft located at a first position of the pin hole, the insert and / or the lock tongue body are provided with a limiting portion, the limiting portion limits the relative rotation of the insert 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 is separated 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] The two 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, 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 insertion piece, and the pin hole penetrates 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 extension direction of the pin hole is perpendicular to the flat direction of the flat hole.

[0018] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted in the present application include at least:

[0019] When the lock tongue of the present application is in normal use in a 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 plug piece 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, and the pin shaft breaks through the retaining portion and moves out of the first position through the pulling force of the seat belt to release the restriction of the limiting portion. The lock tongue body can adaptively adjust relative to the plug piece 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 the webbing is not easy to accumulate or get stuck, and it is not easy to cut the webbing, which can provide better safety protection for passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 paying creative work.

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

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

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

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

[0025] Figure 5 is a back view of the self-adjustable locking tongue in the present application in an initial state;

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

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

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

[0029] Fig. 9 is a schematic diagram of the lock tongue body in the present application;

[0030] Fig.10 It is a schematic diagram of the seat belt wearing state (adaptive angle adjustment state) in the middle and late stages of a vehicle collision in the present application;

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

[0032] Fig.12 It is a back view of the self-adaptive adjustment type lock tongue in the present application in a state of self-adaptive adjustment of angle;

[0033] Fig.13 It 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. 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 implementation methods 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 implementation methods, 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 following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present 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 the present 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 the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device 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 drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0039] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

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

[0041] The embodiment of this specification proposes an adaptive adjustable lock tongue, such as Figure 1 , Figure 2 as well as Figure 3 As shown, it includes a bolt body 1, an insert 2 and a pin 501; the bolt body 1 has a belt hole for passing the safety belt 6, and the insert 2 is used to lock with the lock buckle 7; the pin 501 is fixed to one of the bolt body 1 and the insert 2, and the pin 501 can slide through the pin hole 8 of the other of the bolt body 1 and the insert 2; the pin hole 8 has a retaining portion to keep the pin 501 at the first position 801 of the pin hole 8, characterized in that the insert 2 and / or the bolt body 1 are provided with a limiting portion 9, the limiting portion 9 limits the relative rotation of the insert 2 and the bolt body 1 at the first position 801, and the limiting portion 9 releases the restriction after the bolt 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 hole 8 after the pin 501 moves out of the first position 801 can be used 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 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, and the uncoated portion of the tongue plate portion 102 forms an installation area stacked with a portion of the insert 2, the pin 501 and / or the pin hole 8 are arranged in the installation area, and the limiting portion 9 includes a limiting end face formed at the end of the plastic-coated portion 101 and a limiting base formed at the end of the insert 2 close to the plastic-coated portion 101, the limiting end face cooperates with the limiting base to limit when the pin 501 is in the first position 801, and the limiting end face is separated from the limiting base after the pin 501 moves out of the first position 801. For example, the end face profile of the limiting end face 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, if Figure 2 and Figure 3 As shown, the extension direction of the pin hole 8 coincides with the axis of the bolt 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 buckle 7 and extends outward, and the end of the insert 2 close to the overmolded portion 101 matches the end profile of the overmolded portion 101 to improve the stability of the limiting portion 9. The axis of the bolt body 1 and / or the insert 2 can be their respective vertical center lines, and when the pin shaft 501 is in the first position 801, the axis of the bolt body 1 and the insert 2 coincide.

[0045] In one embodiment, if Figure 1 and Figure 2 As shown, the inserting piece 2 is provided with a fixing hole for the pin 501 to be inserted, and the pin hole 8 is located on the bolt body 1; the two ends of the pin 501 are provided with fixing parts 502, the pin 501 is inserted through the fixing hole and the pin hole 8, and the two fixing parts 502 respectively abut against the mutually opposite surfaces of the bolt body 1 and the inserting piece 2. The pin 501 and the fixing parts 502 at both ends can be formed by rivets 5.

[0046] In one embodiment, if 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 is transitionally matched with the locking hole portion, and the pin shaft 501 is transitionally or clearance-matched with the rotating hole portion. 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, if 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, if Figure 1 and Figure 2 As shown, a bushing 3 is installed on the lock tongue body 1 by forming a sleeve hole, and 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, if Figure 1 and Figure 2 As shown, a gasket 4 is sandwiched between the inserting piece 2 and the bolt body 1 , and a plate hole is opened in the gasket 4 around the pin hole 8 , and the pin shaft 501 is inserted through the plate 2 hole.

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

[0051] This application is a self-adjustable lock tongue that is easy to assemble. Fig.13 As shown, it is mainly composed of a lock tongue body 1, an insert 2, a gasket 4, a bushing 3 and a rivet 5. The bushing 3 is inserted into the sleeve hole of the lock tongue body 1, and then the gasket 4 and the insert 2 are penetrated through the rivet 5 for overall connection, and finally riveted by a rotary riveting process. The lock tongue is used to cooperate with the seat belt 6 and the lock buckle 7 to achieve the locking function. The lock tongue has no difference in use from an ordinary lock tongue when used normally by passengers. When a collision occurs, this part can be switched to an adaptive angle adjustment style, so that the webbing of the lock tongue part is always in a smooth penetration state during the entire collision process to prevent the webbing from accumulating and jamming.

[0052] In the present application, when the vehicle is in normal use, 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 additional 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 the force conditions, so that the occupant can keep the webbing in a smooth penetration state in the middle and late stages of a vehicle collision, avoiding the dangerous situation of webbing accumulation, jamming or even webbing cutting.

[0053] Normal wearing and use Figure 3 , Figure 4 as well as Figure 5 As shown, the plastic-coated 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. By connecting the rivet 5 and the common structural limiting cooperation of the plastic-coated lock tongue body 1 and the insert 2, it is made to have no angle adjustment capability in the initial state, that is, at this time, it is no different from the existing integrated lock tongue; at the initial 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, the bolt 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 buckle 7 of the seat belt 6 will restrain the occupant on the seat. However, the force on the webbing will continue to increase. When a certain force value is reached, the bolt body 1 will be pulled out a small distance, and its own limiting structure will fail at this time, and it will be in the adaptive angle adjustment stage. The switching principle and angle adjustment principle are as follows: Fig. 9 As shown, the structure of 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, and 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. Fig.10 , Fig.11 as well as Fig.12 As shown, in the middle and late stages of a collision, since the existing seat belt 6 basically has a limited force 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 occupant in the middle and late stages of a collision. In this process, the movement of the occupant will increase, and the posture of the occupant on the seat will change, that is, the occupant will move toward the front of the vehicle. At this time, the webbing will also change with the occupant at a corresponding angle. At this stage, the adaptive function will play a corresponding role, that is, to adapt its own angle in conjunction with the angle change of the webbing, thereby ensuring that the webbing passes smoothly throughout the 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 is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An adaptively adjustable lock tongue, comprising a lock tongue body, an insert and a pin; the lock tongue body has a belt hole for passing a safety belt, the insert is used to lock with a lock buckle; the pin is fixed to one of the lock tongue body and the insert, and the pin can slide through the pin hole of the other of the lock tongue body and the insert; the pin hole has a retaining portion to keep the pin located at a first position of the pin hole, characterized in that: The insert and / or the lock tongue body are provided with a limiting portion, which limits the relative rotation of the insert and the lock tongue body of the pin at 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 pulling force of the safety belt.

2. The self-adaptive locking tongue according to claim 1, characterized in that: 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 the 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 is separated from the limiting base after the pin shaft moves out of the first position.

3. The self-adaptive locking tongue according to claim 2, 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.

4. The self-adaptive locking tongue according to claim 3, 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.

5. The self-adaptive locking tongue according to any one of claims 1 to 4, characterized in that: 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; The two 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.

6. The self-adaptive locking tongue according to claim 5, characterized in that: The pin hole comprises 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.

7. The self-adaptive locking tongue according to claim 6, characterized in that: The length of the pin hole is less than twice the diameter of the pin shaft.

8. The self-adaptive locking tongue according to claim 6, 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 insertion piece, and the pin hole penetrates the sleeve body along the insertion direction of the sleeve body.

9. The self-adaptive locking tongue according to claim 5, characterized in that: A gasket is sandwiched between the insert and the lock tongue body, and the gasket is provided with a sheet hole around the pin hole, and the pin shaft is inserted through the sheet hole.

10. The self-adaptive lock tongue according to any one of claims 1 to 4, 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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