Safety belt retractor

Abstract

The utility model discloses a safety belt retractor which comprises a retractor frame, a reel, a safety belt and a belt guide assembly, the reel is rotatably fixed on the retractor frame, a first end of the safety belt is wound on the reel, the belt guide assembly comprises a base installed on the retractor frame, the base is provided with a woven belt outlet for a second end of the safety belt to penetrate through, and the woven belt outlet is communicated with the reel. The guide belt assembly further comprises a sliding rail, a sliding cover and a bias structure. Wherein the sliding rail is arranged on the base and extends in the direction parallel to the first direction; the sliding cover is arranged on the sliding rail and can move between a first position and a second position of the braid outlet under the action of the sliding rail; the bias structure is arranged on the base and pushes the sliding cover to enable the sliding cover to have the trend of moving from the second position to the first position. The hand feeling when the safety belt is stretched or rolled can be optimized through the sliding cover, and the problems that the friction force between an existing belt guiding structure and the safety belt is large, and the woven belt outlet is difficult to be completely sealed are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive safety equipment, and particularly relates to a seat belt retractor. Background Art

[0002] The function of the retractor is to cooperate with the safety belt to fix the vehicle occupants on the seat during a collision to protect the occupants. The retractor generally includes components such as a main body bracket, a reel, and a locking assembly. The main body bracket is a cavity structure with an opening. The reel and the locking assembly are both arranged inside the main body bracket. The reel is used to wind one end of the safety belt, and the other end of the safety belt extends outwards from the opening of the main body bracket. When the safety belt is wound around the reel or released from the reel, due to the change in the winding thickness of the safety belt on the reel, the lateral position of the safety belt at the opening part of the main body bracket will change inside the opening. In addition, in order to guide the safety belt in and out of the retractor, a belt guiding assembly is provided on the retractor in the prior art, and an inlet and outlet for the safety belt to pass through are reserved on the belt guiding assembly, and the width of the inlet and outlet is reduced to prevent dust from entering.

[0003] In the prior art, since the position of the inlet and outlet of the belt guiding assembly cannot change with the change in the position of the part of the safety belt at the opening of the main body bracket, when the position of the safety belt changes inside the opening of the main body bracket, the safety belt rubs violently against the side wall of the inlet and outlet, resulting in difficulty in winding and stretching the safety belt.

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

[0005] In view of this, an embodiment of the utility model provides a seat belt retractor to at least solve the problems that the inlet and outlet of the existing belt guiding assembly are prone to violent friction with the seat belt, resulting in difficulty in winding or retracting the seat belt and difficulty in achieving an effective dust-proof effect.

[0006] The embodiment of the utility model provides the following technical solutions:

[0007] A first aspect of the embodiment of the utility model provides a seat belt retractor, including a retractor frame, a reel, a seat belt, and a belt guiding assembly. The reel is rotatably fixed on the retractor frame. The first end of the seat belt is wound on the reel. The belt guiding assembly includes a base installed on the retractor frame. The base is provided with a webbing outlet for the second end of the seat belt to pass through. When the seat belt is being pulled out, the seat belt can move along a first direction at the webbing outlet. The belt guiding assembly further includes:

[0008] A slide rail, which is arranged on the base and extends along a direction parallel to the first direction;

[0009] A sliding cover is disposed on the slide rail and can move between a first position and a second position of the webbing outlet under the action of the slide rail. Wherein, the first position is the position of the sliding cover when the webbing outlet is closed, and the second position is the position of the sliding cover when the webbing outlet is opened;

[0010] A biasing structure is disposed on the base and pushes the sliding cover so that the sliding cover has a tendency to move from the second position to the first position and keeps the sliding cover in contact with the safety belt.

[0011] Furthermore, there are two slide rails, which are relatively spaced apart on the base. Each slide rail includes:

[0012] A sliding rib, the sliding rib extends along a direction parallel to the first direction and is disposed on the base, and is matched with a sliding groove opened at the bottom of the sliding cover;

[0013] A limiting rod is erected on the sliding rib;

[0014] Wherein, the sliding cover is embedded between the sliding rib and the limiting rod and can move along the sliding rib through the sliding groove.

[0015] Furthermore, the biasing structure includes:

[0016] A link assembly, the link assembly includes a connecting portion and two rod portions located on both sides of the connecting portion. The connecting portion is fixed on the base. Each rod portion extends along a direction parallel to the first direction and is located on the side of the corresponding slide rail away from the center of the base;

[0017] Two return springs, the two return springs are correspondingly sleeved on the two rod portions;

[0018] Furthermore, the sliding cover further includes:

[0019] Two sliding sleeves are disposed on both sides of the sliding cover and sleeved on the corresponding rod portions. When the sliding sleeves are pushed by the corresponding return springs, the sliding sleeves and the sliding cover have a tendency to move from the second position to the first position.

[0020] Furthermore, the base further includes:

[0021] A buckle plate is disposed at the end of the base away from the webbing outlet. The first end of the buckle plate extends upward from the base and is provided with a card slot, and the card slot is cooperatively engaged with a clamping portion formed on the connecting portion to clamp the connecting portion on the base.

[0022] Furthermore, the base further comprises:

[0023] Two undercut parts, the two undercut parts are arranged on both sides of the end of the base away from the ribbon outlet;

[0024] Furthermore, the connecting portion further comprises:

[0025] Two undercut plates are arranged at the bottom ends of both sides of the connecting portion and extend downwardly from the connecting portion, and each of the undercut plates is provided with an undercut hole matched with the undercut portion.

[0026] Further, the end of the base away from the webbing outlet extends downward to correspond to the top of the retractor frame, and a plurality of limiting protrusions are provided at intervals on a side wall facing the retractor frame;

[0027] Furthermore, the retractor frame further comprises:

[0028] A frame part, the frame part includes a main board and two side boards, the two side boards are arranged at two ends of the main board opposite to each other to form a U-shaped frame, and when the base is installed on the frame part, at least two side boards are pre-installed between the base;

[0029] The cover plate is connected to one end of the two side plates away from the main board, and a plurality of limiting grooves are arranged at intervals on the top of the cover plate, and the plurality of limiting grooves correspond to and are cooperatively connected with the plurality of limiting protrusions.

[0030] Furthermore, each of the side panels comprises:

[0031] A first pre-installation step, wherein the first pre-installation step is arranged at a top end of the side plate close to a side of the cover plate;

[0032] a second pre-installation step, the second pre-installation step being arranged at a top end of the side plate close to a side of the main plate and lower than the first pre-installation step;

[0033] Among them, at least the second pre-installation step is rolled toward the outside of the frame part to form a curled edge, and the curled edge forms a recess on the side away from the side panel, and the recess corresponds to and is cooperatively connected with a block arranged on the end side of the base close to the webbing outlet.

[0034] Furthermore, the card block:

[0035] A clamping plate, the clamping plate is led out from the clamping block and extends in a direction away from the base;

[0036] Furthermore, the retractor frame further comprises:

[0037] Two end caps, the two end caps are correspondingly arranged on the outer sides of the two side plates, and clamping grooves are provided at the tops of the two end caps, and the clamping grooves are correspondingly and cooperatively arranged with the clamping plates, and are used for fixing the base on the retractor frame when the end caps are fixedly arranged on the corresponding side plates.

[0038] Further, the base further includes:

[0039] A supporting part, the supporting part is arranged at the bottom end of the base and is correspondingly arranged with the top end of the second pre-installation step, and is used for supporting the end of the base with the webbing outlet when abutting against the second pre-installation step.

[0040] The second aspect of the present invention further provides a seat belt retractor, including a retractor frame, a reel, a seat belt and a guide belt assembly. The reel is rotatably fixed on the retractor frame. The first end of the seat belt is wound on the reel. The guide belt assembly includes a base fixed on the retractor frame. A webbing outlet for the second end of the seat belt to pass through is provided on the base. During the process of pulling out or winding up the seat belt, the seat belt can move in a first direction at the webbing outlet. The guide belt assembly further includes:

[0041] A slide rail, the slide rail is arranged on the base and extends along the first direction;

[0042] A sliding cover, the sliding cover is placed on the slide rail, and an opening for the second end of the seat belt to pass through is provided on the sliding cover, and the sliding cover can move between a first position and a second position of the webbing outlet under the action of the slide rail. Among them, the first position is the position of the sliding cover when the sliding cover closes the webbing outlet, and the second position is the position of the sliding cover when the sliding cover opens the webbing outlet;

[0043] A biasing structure, the biasing structure is arranged on the base and pushes the sliding cover so that the sliding cover and the seat belt have a tendency to move from the second position to the first position.

[0044] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted in the embodiments of the present invention at least include:

[0045] In a seat belt retractor of the present invention, when the seat belt is pulled out, the seat belt pushes the sliding cover to move from the first position to the second position in the first direction, and always pushes the sliding cover during the movement. The sliding cover pushes the biasing structure so that the biasing structure is stressed and contracted. Therefore, through the movement of the sliding cover, the friction force of the sliding cover on the seat belt when it is stretched is reduced and minimized, the feel of pulling out the webbing is optimized, and it is convenient to pull out the seat belt;

[0046] When the seat belt is retracted, the seat belt moves in the first direction and no longer actively pushes against the sliding cover. At this time, the sliding cover actively pushes against the seat belt under the pushing of the biasing structure, causing the seat belt to move from the second position of the webbing outlet to the first position to close the webbing outlet. Finally, when the seat belt is retracted to the designated position, the sliding cover pushes against the seat belt to completely close the webbing outlet, preventing dust from entering the retractor frame through the webbing outlet, thereby achieving the dust-proof effect of the seat belt retractor. Moreover, due to the biasing structure and the sliding cover pushing against the seat belt, a certain frictional force is given when the seat belt is retracted, optimizing the feel when the seat belt is retracted and preventing the seat belt from being retracted quickly. Brief Description of the Drawings

[0047] 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 in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0048] Figure 1 Structural schematic diagram of the sliding cover in the first position in a seat belt retractor of the present utility model;

[0049] Figure 2 Structural schematic diagram of the sliding cover in the second position in a seat belt retractor of the present utility model;

[0050] Figure 3 Side sectional view of the sliding cover in the first position in a seat belt retractor of the present utility model;

[0051] Figure 4 Test sectional view of the sliding cover in the second position in a seat belt retractor of the present utility model;

[0052] Figure 5 Structural schematic diagram of the webbing guiding assembly of the present utility model;

[0053] Figure 6 Exploded view of the webbing guiding assembly of the present utility model;

[0054] Figure 7 Back view schematic diagram of the sliding cover of the present utility model;

[0055] Figure 8 Partial exploded view of the link assembly and the base of the present utility model;

[0056] Figure 9 Partial exploded view of a seat belt retractor of the present utility model from two different perspectives;

[0057] Figure 10The utility model is an exploded view of the end cover and frame of a seat belt retractor.

[0058] The accompanying drawings of the present utility model are as follows:

[0059] 10. Retractor frame; 11. Frame portion; 111. Main board; 112. Side board; 1121. First pre-installation step; 1122. Second pre-installation step; 1123. Curling; 12. Cover plate; 121. Positioning groove; 13. End cover; 131. Snap-in groove;

[0060] 20. Scroll;

[0061] 30. Safety belts;

[0062] 40. Guide belt assembly;

[0063] 41, base; 411, webbing outlet; 412, buckle plate; 4121, slot; 413, undercut portion; 414, limit convex block; 415, clamping block; 4151, clamping plate; 416, support portion;

[0064] 42, slide rail; 421, sliding convex strip; 422, limit rod;

[0065] 43, sliding cover; 431, sliding groove; 432, sliding sleeve; 433, opening;

[0066] 44. Biasing structure; 441. Connecting rod assembly; 4411. Connecting portion; 4412. Rod portion; 4413. Clamping portion; 4414. Undercut plate; 4415. Undercut hole; 442. Return spring. DETAILED DESCRIPTION

[0067] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0068] 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.

[0069] It should be noted that the following description relates to various aspects of embodiments within the scope of the appended claims. It will 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 illustrative only. Based on this application, those skilled in the art should understand that one 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 aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionality in addition to one or more of the aspects set forth herein.

[0070] It should also be noted that the diagrams provided in the following embodiments only illustrate the basic concept of this application schematically. Only the components related to this application are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in its actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0071] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that these examples can be practiced without these specific details.

[0072] In order to prevent dust from entering the retractor for the existing seat belt 30 belt guide, the width of the belt outlet of the belt guide is usually close to the thickness of the seat belt 30. At this time, since the width of the belt outlet is small and cannot move, when the seat belt 30 is pulled out or retracted, the frictional force is large, making it difficult to pull out or retract the seat belt 30, and the pulling feel is also poor. In addition, in order to enable the seat belt 30 to slide within the belt outlet, the belt outlet cannot be in close contact with the seat belt 30, which will also cause dust to easily enter the retractor from between the seat belt 30 and the belt outlet.

[0073] Based on this, the embodiments of this specification propose a processing solution: As Figures 1-2 shown, for a seat belt retractor of the present utility model, by slidably arranging the sliding cover 43 of the belt guiding assembly 40 on the base 41, when the seat belt 30 is pulled out, the sliding cover 43 can be pushed to move to the second position of the webbing outlet 411 and squeeze the biasing structure 44, thereby reducing the frictional force when the seat belt 30 is pulled out; when the seat belt 30 is retracted, the seat belt 30 can be actively pushed by the biasing structure 44 and the sliding cover 43, and the sliding cover 43 can close the webbing outlet 411 after the seat belt 30 is retracted to prevent dust from entering the retractor frame 10 and optimize the retracting feel of the seat belt 30.

[0074] The following describes the technical solutions provided by the embodiments of this application in conjunction with the accompanying drawings.

[0075] As Figures 1-6 shown, a seat belt retractor provided by the utility model includes a retractor frame 10, a reel 20, a seat belt 30, and a belt guiding assembly 40. Among them, the reel 20 is rotatably fixed on the retractor frame 10, the first end of the seat belt 30 is wound on the reel 20, and the belt guiding assembly 40 includes a base 41 installed on the retractor frame 10. A webbing outlet 411 for the second end of the seat belt 30 to pass through is provided on the base 41. During the process of the seat belt 30 being pulled out, the seat belt 30 can move in a first direction at the webbing outlet 411.

[0076] Among them, when the reel 20 rotates, the reel 20 can wind the seat belt 30 in sequence from the first end to the second end of the seat belt 30. And when the thickness of the seat belt 30 wound on the reel 20 changes, the position of the seat belt 30 at the webbing outlet 411 also changes. That is to say, as the seat belt 30 is pulled out or the reel 20 rotates, the seat belt 30 can reciprocally move in the first direction within the webbing outlet 411.

[0077] Among them, the seat belt 30 moving in the first direction at the webbing outlet 411 means that the part of the seat belt 30 at the webbing outlet 411 can move in the first direction according to the thickness of the seat belt 30 wound on the reel 20.

[0078] Among them, the seat belt 30 moving in the first direction at the webbing outlet 411 includes the seat belt 30 moving forward in the first direction or moving backward in the first direction.

[0079] For example, when the seat belt 30 is pulled out from the webbing outlet 411, it moves from the first end of the webbing outlet 411 to the second end of the webbing outlet 411; when the seat belt 30 is wound by the reel 20, the seat belt 30 moves from the second end of the webbing outlet 411 to the first end of the webbing outlet 411. Among them, the first end and the second end of the webbing outlet 411 are both located in the first direction.

[0080] Among them, the belt guiding assembly 40 is used to guide the seat belt 30 to be pulled out or wound.

[0081] Among them, after the base 41 is installed on the retractor frame 10, the seat belt 30 extends outwards from the webbing outlet 411 or is wound from the webbing outlet 411.

[0082] Among them, the webbing outlet 411 has a certain width so that the seat belt 30 can move within the webbing outlet 411 without contacting the side wall of the webbing outlet 411.

[0083] For example, the width of the webbing outlet 411 is greater than or equal to the maximum thickness of the seat belt 30 wound on the reel 20.

[0084] Among them, the length of the webbing outlet 411 is similar to the width of the seat belt 30, so as to facilitate the movement of the seat belt 30 within the webbing outlet 411. Preferably, the length of the webbing outlet 411 is equal to or slightly greater than the width of the seat belt 30.

[0085] Among them, the principle of the reel 20 for retracting the seat belt 30 is the same as that of the prior art, and will not be elaborated here.

[0086] As Figure 6 shown, the webbing guiding assembly 40 further includes a slide rail 42, a sliding cover 43, and a biasing structure 44. Among them, the slide rail 42 is disposed on the base 41 and extends along a direction parallel to the first direction; the sliding cover 43 is placed on the slide rail 42 and can move between a first position and a second position of the webbing outlet 411 under the action of the slide rail 42, where the first position is the position of the sliding cover 43 when the webbing outlet 411 is closed, and the second position is the position of the sliding cover 43 when the webbing outlet 411 is opened; the biasing structure 44 is disposed on the base 41 and pushes the sliding cover 43 so that the sliding cover 43 has a tendency to move from the second position to the first position, and keeps the sliding cover 43 in contact with the seat belt 30.

[0087] Among them, the slide rail 42 has a certain length so that when the sliding cover 43 moves on the slide rail 42, it can completely close or open the webbing outlet 411.

[0088] Among them, the size of the sliding cover 43 is larger than the size of the webbing outlet 411 so that the sliding cover 43 can completely close the webbing outlet 411.

[0089] Among them, the sliding cover 43 can be a plate-shaped structure.

[0090] When the sliding cover 43 is pressed by the seat belt 30 and moves from the first position to the second position, the sliding cover 43 can push the biasing structure 44 so that the biasing structure 44 contracts; when the sliding cover 43 is not pressed by the seat belt 30, the biasing structure 44 is released and pushes the sliding cover 43 to move from the second position to the first position, and at the same time the sliding cover 43 always keeps in contact with the seat belt 30 and pushes the seat belt 30.

[0091] Preferably, when the biasing structure 44 is in a non-compressed state, the sliding cover 43 just completely closes the webbing outlet 411 and does not apply a thrust to the seat belt 30, so as to facilitate the retraction of the seat belt 30.

[0092] Specifically, when the seat belt 30 is pulled out, the seat belt 30 moves from the first end to the second end of the webbing outlet 411. At this time, the seat belt 30 pushes against the sliding cover 43 to open the webbing outlet 411, causing the sliding cover 43 to move from the first position to the second position and compressing the biasing structure 44. When the seat belt 30 is retracted, the seat belt 30 moves from the second end to the first end of the webbing outlet 411 to release the sliding cover 43. Then, the sliding cover 43 moves from the second position to the first position under the action of the biasing structure 44, and the sliding cover 43 is always in contact with the seat belt 30 until the sliding cover 43 completely closes the webbing outlet 411 under the action of the biasing structure 44.

[0093] Wherein, the slide rail 42 is provided as at least one or more.

[0094] Specifically, when the slide rail 42 is provided as one, the slide rail 42 can be set to the middle position of the base 41. When there are multiple slide rails 42, the slide rails 42 can be spaced apart on the base 41 to maintain the stability of the sliding cover 43.

[0095] In some embodiments, the longitudinal section of the slide rail 42 can be set to structures such as an L shape or a T shape to fix the sliding cover 43 on the slide rail 42 and prevent the sliding cover 43 from detaching from the slide rail 42.

[0096] In some embodiments, there are two slide rails 42, which are relatively spaced apart and arranged in parallel on the base 41.

[0097] Preferably, the heads and tails of the two slide rails 42 are correspondingly arranged.

[0098] Specifically, as Figures 6-7 shown, each slide rail 42 includes a sliding rib 421 and a limiting rod 422. Among them, the sliding rib 421 extends along a direction parallel to the first direction and is arranged on the base 41, and is matched with a sliding groove 431 opened at the bottom of the sliding cover 43. The limiting rod 422 is erected on the sliding rib 421.

[0099] Among them, the sliding rib 421 has a certain length so that when the sliding cover 43 slides along the sliding rib 421, it can completely cover or open the webbing outlet 411.

[0100] Among them, one end of the sliding rib 421 close to the sliding cover 43 is set to a strip structure to simplify the structure of the sliding rib 421.

[0101] Among them, the limiting rod 422 is erected on the sliding rib 421 along a direction parallel to the first direction, and the webbing outlet 411 is located between the two limiting rods 422. The width between the two limiting rods 422 is greater than or equal to the width of the seat belt 30.

[0102] The sliding cover 43 is embedded between the sliding protrusion 421 and the limiting rod 422 , and can move along the sliding protrusion 421 through the sliding groove 431 .

[0103] Among them, the limiting rod 422 can be roughly a "[" structure, and after the sliding cover 43 is assembled with the sliding protrusion 421 through the sliding groove 431, the top of the sliding cover 43 is close to the limiting rod 422, so that the sliding cover 43 can move between the limiting rod 422 and the sliding protrusion 421 while the sliding cover 43 does not separate from the limiting rod 422 and the sliding groove.

[0104] In some of the embodiments, the two limiting rods 422 on the two slide rails 42 may be at least partially connected by a plate structure to seal the gap between the slide cover 43 and the base 41 .

[0105] For example, the ends of the two limit rods 422 away from the safety belt 30 are connected to each other through a plate structure, and the longitudinal section of the plate structure is the same as the longitudinal section of the limit rod 422. The ends of the two limit rods 422 away from the safety belt 30 cooperate with the base 41 to form a sealed cavity to seal the gap between the sliding cover 43 and the base 41, and the sliding cover 43 can slide in the sealing structure.

[0106] like Figure 6 As shown, the biasing structure 44 includes a connecting rod assembly 441 and two return springs 442. The connecting rod assembly 441 includes a connecting portion 4411 and two rod portions 4412 located on both sides of the connecting portion 4411. The connecting portion 4411 is fixed on the base 41. Each rod portion 4412 extends in a direction parallel to the first direction and is located on a side of the corresponding slide rail 42 away from the center of the base 41. The two return springs 442 are correspondingly sleeved on the two rod portions 4412.

[0107] Specifically, both ends of the connecting portion 4411 extend outward to the outside of the slide rail 42 , so that the rod portion 4412 is located on the outside of the corresponding slide rail 42 , wherein the outside of the slide rail 42 is the side of the slide rail 42 away from the center of the base 41 .

[0108] There is a certain distance between the rod portion 4412 and the slide rail 42 , so that the return spring 442 can be compressed or released on the rod portion 4412 .

[0109] The sliding cover 43 also includes two sliding sleeves 432, which are arranged on both sides of the sliding cover 43 and sleeved with corresponding rods 4412. When the sliding sleeves 432 are pushed by the corresponding return springs 442, the sliding sleeves 432 and the sliding cover 43 have a tendency to move from the second position to the first position.

[0110] Among them, when the sliding cover 43 is embedded between the limiting rod 422 and the sliding convex strip 421, both sliding sleeves 432 are located outside the corresponding slide rails 42, so as to be sleeved on the corresponding rod parts 4412.

[0111] Among them, the sliding sleeve 432 has a cylindrical structure and is fixedly installed on both sides of the sliding cover 43.

[0112] Among them, the inner diameter of the sliding sleeve 432 is smaller than the diameter of the return spring 442, so that when the sliding sleeve 432 is sleeved on the rod part 4412 and slides along the rod part 4412, the sliding sleeve 432 can compress the return spring 442 or slide along the rod part 4412 under the action of the return spring 442.

[0113] Specifically, when the safety belt 30 is stretched and the sliding cover 43 is pressed by the safety belt 30 to move from the first position to the second position, the sliding cover 43 can compress the two return springs 442 through the sliding sleeves 432 on both sides; when the safety belt 30 is retracted, the safety belt 30 moves in the webbing outlet 411 and releases the sliding cover 43. At this time, the two return springs 442 drive the sliding cover 43 to push against the safety belt 30 through the two sliding sleeves 432, so that the sliding cover 43 remains in contact with the safety belt 30.

[0114] In some of the embodiments, the connecting portion 4411 can be fixed to the base 41 by bolts or other fasteners.

[0115] In some of the embodiments, as Figure 6 、 8 shown, the base 41 further includes a buckle plate 412. The buckle plate 412 is arranged at the end of the base 41 far from the webbing outlet 411. The first end of the buckle plate 412 extends upward from the base 41 and is provided with a card slot 4121. The card slot 4121 cooperates with the engaging portion 4413 formed on the connecting portion 4411 to engage and fix the connecting portion 4411 to the base 41.

[0116] Among them, the buckle plate 412 extends along the width direction of the base 41 and covers the gap between the base 41 and the reel 20 frame. For example, the width of the buckle plate 412 is equal to the width of the base 41.

[0117] Among them, the buckle plate 412 can be bent toward the direction of the base 41, and a card slot 4121 is provided on the inner surface formed after the buckle plate 412 is bent. For example, the card slot 4121 can be opened on the surface of the buckle plate 412 facing the base 41.

[0118] Among them, the engaging portion 4413 formed on the connecting portion 4411 can be integrally provided on the connecting portion 4411.

[0119] For example, the snap-fitting portion 4413 can be directly the side of the connecting portion 4411 close to the buckle plate 412, in which case the side of the connecting portion 4411 close to the buckle plate 412 can be directly snapped into the interior of the slot 4121; or the snap-fitting portion 4413 is formed on the side of the connecting portion 4411 close to the buckle plate 412, and the thickness of the snap-fitting portion 4413 is less than the thickness of the connecting portion 4411, and can be snapped into the interior of the slot 4121.

[0120] In some of the embodiments, the card slot 4121 extends along the width direction of the buckle plate 412 and is snap-connected with the snap-connecting portion 4413 formed on the connecting portion 4411. At this time, the snap-connecting portion 4413 can be integrally arranged on the side of the connecting portion 4411 close to the buckle plate 412 or directly on the side of the connecting portion 4411 close to the buckle plate 412.

[0121] In some of the embodiments, the card slot 4121 can be formed by a plurality of sub-card slots 4121 spaced apart from each other, and correspond to and cooperate with a sub-card connecting portion 4413 formed on the connecting portion 4411. In this case, the card connecting portion 4413 can include a plurality of sub-card connecting portions 4413, and are spaced apart on one side of the connecting portion 4411 close to the buckle plate 412.

[0122] Among them, the shape of the longitudinal section of the card slot 4121 matches the shape of the longitudinal section of the card connection portion 4413, which can be a rectangular, C-shaped, "["-shaped or other structures.

[0123] Preferably, the shape of the longitudinal section of the card slot 4121 is set to “【” so as to match with the card connection portion 4413 formed on the connecting portion 4411.

[0124] In some of the embodiments, the buckle plate 412 can be bent upward from the base 41 to form a slot 4121, thereby simplifying the production process of the slot 4121, and also enabling the top of the buckle plate 412 to form an arc, so that the seat belt retractor as a whole is more compact and beautiful.

[0125] like Figure 8 As shown, the base 41 further includes two undercut portions 413 , which are disposed at both sides of the end of the base 41 away from the webbing outlet 411 , and are used to preliminarily install and fix the connecting portion 4411 to the base 41 .

[0126] The undercut portion 413 may be a prism-shaped structure with a longitudinal cross-section having a triangular, rectangular, semicircular or other structure.

[0127] The undercut portion 413 is fixedly mounted on the side wall of the base 41 .

[0128] The connecting portion 4411 further includes two undercut plates 4414 , which are disposed at the bottom ends of both sides of the connecting portion 4411 and extend downward from the connecting portion 4411 , and each undercut plate 4414 is provided with an undercut hole 4415 that cooperates with the undercut portion 413 .

[0129] Among them, after the base 41 is engaged through the slot 4121 and the engaging portion 4413, the base 41 and the connecting portion 4411 are not limited and fixed, so the undercut portion 413 can be inserted into the undercut hole 4415 to preliminarily install and fix the base 41 and the connecting portion 4411.

[0130] Specifically, after the snap-fitting portion 4413 of the connecting portion 4411 is inserted into the slot 4121, the connecting portion 4411 is pressed downward so that the inverted plate 4414 drives the inverted portion 413 to move downward to correspond to the inverted portion 413 on the base 41, and the inverted portion 413 enters the corresponding inverted hole 4415 to preliminarily fix the connecting portion 4411 to the base 41.

[0131] Furthermore, the end of the base 41 away from the webbing outlet 411 extends downward to correspond to the top of the retractor frame 10 , and a plurality of limiting protrusions 414 are provided at intervals on a side wall facing the retractor frame 10 .

[0132] Among them, the end of the base 41 away from the webbing outlet 411 extends downward to form a mounting plate structure, and the mounting plate structure extends to a corresponding setting with the top of the retractor frame 10. At this time, multiple limiting protrusions 414 can be spaced apart on the side of the mounting plate structure facing the retractor frame 10.

[0133] In some of the embodiments, the pinch plate 412 may extend downward, and a plurality of limiting protrusions 414 may be disposed on the pinch plate 412 .

[0134] like Figure 9 As shown, the retractor frame 10 also includes a frame portion 11 and a cover plate 12, the frame portion 11 includes a main board 111 and two side plates 112, the two side plates 112 are relatively arranged at both ends of the main board 111 to form a U-shaped frame, and when the base 41 is buckled on the frame portion 11, at least the two side plates 112 are pre-installed with the base 41; the cover plate 12 is connected to one end of the two side plates 112 away from the main board 111, and a plurality of limiting grooves 121 are spaced apart at the top end of the cover plate 12, and the plurality of limiting grooves 121 correspond to and are cooperatively connected with a plurality of limiting protrusions 414.

[0135] After the main board 111 and the two side boards 112 are connected, the top of the main board 111 and the top of the two side boards 112 are substantially at the same height, so that the base 41 can be easily installed on the main board 111 and the two side boards 112 .

[0136] Wherein, the two side plates 112 are vertically installed on the main board 111 to form a U-shaped structure, which also facilitates the installation of the reel 20 between the two side plates 112.

[0137] Wherein, at least part of the edge of one end of the two side plates 112 away from the main board 111 is provided with an arc-shaped structure to adapt to the cylindrical winding structure formed after the reel 20 winds the safety belt 30.

[0138] Wherein, at least part of the cover plate 12 is arc-shaped in the vertical direction, and its shape matches the edge of one end of the side plate 112 away from the main board 111, so as to be able to cooperate and connect with the side plate 112 and adapt to the cylindrical winding structure formed after the reel 20 winds the safety belt 30.

[0139] Wherein, after the cover plate 12, the two side plates 112 and the main board 111 are assembled, a frame structure with openings at both the upper and lower parts is formed, and the safety belt 30 can extend outwards from the upper opening of the frame structure.

[0140] Wherein, a plurality of limiting grooves 121 can be arranged at equal intervals at the top end of the cover plate 12 and are arranged in cooperation with corresponding limiting protrusions 414.

[0141] Wherein, the longitudinal cross-sectional shape of the limiting protrusion 414 is equal to the longitudinal cross-sectional shape of the limiting groove 121, and can be in shapes such as circular, rectangular or triangular.

[0142] Further, each side plate 112 includes a first pre-installation step 1121 and a second pre-installation step 1122. Wherein, the first pre-installation step 1121 is arranged on one side of the top end of the side plate 112 close to the cover plate 12 for abutting against and supporting the base 41; the second pre-installation step 1122 is arranged on one side of the top end of the side plate 112 close to the main board 111 and is lower than the first pre-installation step 1121. The second pre-installation step 1122 is turned outwards towards the frame part 11 to form a curled edge 1123, and a concave part is formed on the side of the curled edge 1123 away from the side plate 112. The concave part corresponds to and is connected in cooperation with a clamping block 415 arranged on one end side of the base 41 close to the webbing outlet 411.

[0143] Wherein, the first pre-installation step 1121 is used to abut against the bottom of one end of the base 41 when the base 41 is installed on the reel 20 frame to support one end of the base 41; the second pre-installation step 1122 is used to connect the base 41 to the reel 20 frame through the cooperation between the concave part on the second pre-installation step 1122 and the clamping block 415 on the base 41 to limit the other end of the base 41, so as to realize the pre-installation and fixation of the base 41. Wherein, one end of the base 41 is the end of the base 41 away from the webbing outlet 411, and the other end of the base 41 is the end of the base 41 close to the webbing outlet 411.

[0144] Among them, an interference connection can be formed between the recess on the curled edge 1123 and the clamping block 415 on the base 41, so that a firm connection can be achieved between the recess and the clamping block 415.

[0145] Among them, by checking whether the first pre-installation step 1121 is in full contact with the bottom of the base 41 and whether the recess on the curled edge 1123 of the second pre-installation step 1122 is in mating connection with the clamping block 415, it is also convenient for the staff to determine whether the base 41 is pre-installed in place.

[0146] In some of these embodiments, when forming the curled edge on the second pre-installation step 1122, the top end of the side plate can be turned up simultaneously, so that curled edges are formed on both the first pre-installation step 1121 and the second pre-installation step 1122.

[0147] Specifically, one end of the base 41 is pre-installed at one end of the reel 20 frame through the limit groove 121 and the limit protrusion 414, and the other end of the base 41 is pre-installed at the other end of the reel 20 frame through the recess on the curled edge 1123 of the second pre-installation step 1122 and the clamping block 415, so that the base 41 can be completely pre-installed on the reel 20 frame.

[0148] The base 41 further includes a support portion 416, which is arranged at the bottom end of the base 41 and corresponds to the top end of the second pre-installation step 1122, and is used to support the end of the base 41 with the webbing outlet 411.

[0149] Among them, the support portion 416 can be arranged along the width direction of the base 41 at the end of the base 41 with the webbing outlet 411, and is used to abut against the second pre-installation step 1122 to support the end of the base 41 with the webbing outlet 411.

[0150] Specifically, since the other end of the base 41 does not abut against the top end of the second pre-installation step 1122 and is only connected by interference between the recess of the curled edge 1123 and the clamping block 415, therefore, it is necessary to use the support portion 416 to support the other end of the base 41 so that the base 41 can be stably installed on the retractor frame 10.

[0151] Furthermore, the clamping block 415 includes a clamping plate 4151, and the clamping plate 4151 extends from the clamping block 415 in a direction away from the base 41.

[0152] Among them, after the clamping plate 4151 extends from the clamping block 415 in a direction away from the base 41, a plate-like structure is formed.

[0153] Such as Figure 10As shown, the retractor frame 10 also includes two end covers 13, which are correspondingly arranged on the outer sides of the two side plates 112, and the top ends of the two end covers 13 are provided with a snap-in groove 131, and the snap-in groove 131 corresponds to and cooperates with the snap-in plate 4151, and is used to fix the base 41 on the retractor frame 10 when the end cover 13 is fixedly arranged on the corresponding side plate 112.

[0154] Each end cover 13 is fixed to the outer side of the corresponding side plate 112 and can be fixedly connected to the corresponding side plate 112 by bolts.

[0155] After the clamping plate 4151 is inserted into the clamping slot 131 , the clamping plate 4151 abuts against the inner wall of the clamping slot 131 .

[0156] Specifically, after the snap-in plate 4151 is inserted into the corresponding snap-in groove 131, the end cover 13 is fixed to the corresponding side plate 112 by bolts, so that the snap-in plate 4151 is limited to the snap-in groove 131, and then the base 41 is fixed to the frame of the reel 20.

[0157] The working principle of the utility model is as follows:

[0158] When the safety belt 30 is pulled out, the safety belt 30 moves along the first direction at the webbing outlet 411 and pushes the sliding cover 43 to move from the first position to the second position. At the same time, the sliding cover 43 pushes the return spring 442 through the sliding sleeve 432, so that the return spring 442 contracts.

[0159] When the seat belt 30 is retracted, the seat belt 30 moves in the first direction at the webbing outlet 411 and no longer pushes the sliding cover 43. At this time, the sliding cover 43 no longer pushes the return spring 442 through the sliding sleeve 432. The return spring 442 is reset and pushes the sliding cover 43 through the sliding sleeve 432, so that the sliding cover 43 actively pushes the seat belt 30 and closes the webbing outlet 411. After the seat belt 30 is completely retracted, the return spring 442 extends outward to the maximum stroke and the sliding cover 43 completely closes the webbing outlet 411.

[0160] Some installation steps of this utility model are as follows:

[0161] After the spring is sleeved on the rod 4412, the sliding cover 43 is inserted from the side between the limiting convex strip and the limiting rod 422, and the sliding sleeve 432 is sleeved on the rod 4412 accordingly;

[0162] The clamping portion 4413 formed on the connecting portion 4411 is matched and connected with the clamping groove 4121, and the base 41 is pressed down so that the undercut portion 413 is matched and connected with the undercut hole 4415 on the connecting portion 4411, so as to fix the connecting portion 4411 to the base 41;

[0163] Fix one end of the base 41 to the retractor frame 10 using the limit bump 414 and the limit groove 121, and place one end of the base 41 on the first pre-installation step 1121 so that the first pre-installation step 1121 supports one end of the base 41;

[0164] Connect the latch 415 on the base 41 with the recess on the second pre-installation step 1122 to pre-install the other end of the base 41 to the retractor frame, and use the support portion 416 to cooperate with the second pre-installation step 1122 to support the other end of the base 41 so that the base 41 can be pre-installed and stably fixed to the reel 20 frame;

[0165] Finally, connect the snap groove 131 on the end cap 13 with the snap plate 4151, and fix the end cap 13 to the corresponding side plate 112 to fix it to the reel 20 frame through the snap plate 4151 and the snap groove 131.

[0166] When the seat belt 30 of the present utility model is pulled out, since the seat belt 30 on the reel 20 gradually decreases, the position of the seat belt 30 at the webbing outlet 411 gradually moves forward. However, the sliding cover 43 cooperating with the biasing structure 44 and the slide rail 42 enables the sliding cover 43 to synchronize with the forward movement trend of the webbing, and cooperate with the return spring 442 to make the moving speed of the sliding cover 43 stable, so as to optimize the feel when the seat belt 30 is pulled out.

[0167] When the seat belt 30 of the present utility model is retracted by the reel 20, since the seat belt 30 on the retractor shaft gradually increases, the position of the seat belt 30 at the webbing outlet 411 gradually moves backward. At this time, the sliding cover 43 can move backward stably with the assistance of the return spring 442 to optimize the feel when the seat belt 30 is retracted and close the webbing outlet 411.

[0168] The cooperation between the sliding cover 43 and the slide rail 42 of the present utility model can minimize the frictional resistance received by the seat belt 30 when the seat belt 30 is pulled out or retracted, improving the comfort of passengers using it.

[0169] When the seat belt 30 of the seat belt retractor of the present utility model is wound by the reel 20 and received into the seat belt retractor, the sliding cover 43 cooperating with the base 41 can cover the top area of the retractor frame 10, so that when the seat belt 30 on the vehicle is not worn, dust will not enter the inside of the retractor to contaminate the seat belt 30, improving the cleanliness of the seat belt 30 inside the seat belt retractor.

[0170] Embodiment 2

[0171] The difference between this embodiment and Embodiment 1 is that the structure of the sliding cover 43 is different.

[0172] AsFigures 5-6 As shown, the sliding cover 43 is placed on the slide rail 42, and an opening 433 is provided on the sliding cover 43 for the second end of the safety belt 30 to pass through. The sliding cover 43 can move between a first position and a second position of the webbing outlet 411 under the action of the slide rail 42. Among them, the first position is the position of the sliding cover 43 when the sliding cover 43 closes the webbing outlet 411, and the second position is the position of the sliding cover 43 when the sliding cover 43 opens the webbing outlet 411; the biasing structure 44 is arranged on the base 41 and pushes the sliding cover 43 so that the sliding cover 43 and the safety belt 30 tend to move from the second position to the first position.

[0173] Among them, after the safety belt 30 extends outward from the opening 433, if the safety belt 30 is stretched, the safety belt 30 pushes the sliding cover 43 through one side wall of the opening 433, so that the sliding cover 43 moves from the first position to the second position; if the safety belt 30 is retracted, when the sliding cover 43 moves from the second position to the first position, the safety belt 30 is continuously pushed and moved, and when the driving force given by the biasing structure 44 to the sliding cover 43 is not sufficient to push the sliding cover 43 to move, the safety belt 30 can drive the sliding cover 43 to move to the first position through the other side wall of the opening 433, so that the sliding cover 43 completely covers the webbing outlet 411.

[0174] In this specification, the same or similar parts among the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the product embodiments described later, since they correspond to the methods, the descriptions are relatively simple, and the relevant parts can be referred to the partial descriptions of the system embodiments.

[0175] The above is only the specific implementation manner 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 those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A seat belt retractor, comprising a retractor frame, a reel, a seat belt and a belt guiding assembly. The reel is rotatably fixed on the retractor frame. The first end of the seat belt is wound on the reel. The belt guiding assembly includes a base mounted on the retractor frame. A webbing outlet through which the second end of the seat belt passes is provided on the base. During the process of pulling out the seat belt, the seat belt can move in a first direction at the webbing outlet. It is characterized in that, The guide belt assembly also includes: A slide rail, the slide rail is arranged on the base and extends in a direction parallel to the first direction; a sliding cover, the sliding cover being placed on the sliding rail and being movable between a first position and a second position of the webbing outlet under the action of the sliding rail, wherein the first position is the position of the sliding cover when the webbing outlet is closed, and the second position is the position of the sliding cover when the webbing outlet is opened; A biasing structure is arranged on the base and pushes the sliding cover so that the sliding cover has a tendency to move from the second position to the first position and keeps the sliding cover in contact with the safety belt.

2. The seat belt retractor according to claim 1, characterized in that, There are two slide rails, which are relatively spaced and arranged on the base, and each of the slide rails includes: A sliding convex strip extending in a direction parallel to the first direction and arranged on the base, and cooperating with a sliding groove provided at the bottom of the sliding cover; A limiting rod, the limiting rod is mounted on the sliding convex strip; Wherein, the sliding cover is embedded between the sliding protrusion and the limiting rod, and can move along the sliding protrusion through the sliding groove.

3. The seat belt retractor according to claim 2, characterized in that, The bias structure comprises: A connecting rod assembly, the connecting rod assembly comprising a connecting portion and two rod portions located on both sides of the connecting portion, the connecting portion being fixed to the base, each of the rod portions extending in a direction parallel to the first direction and being located on a side of the corresponding slide rail away from the center of the base; Two return springs, the two return springs are correspondingly sleeved on the two rods; The sliding cover also includes: Two sliding sleeves are arranged on both sides of the sliding cover and sleeved with the corresponding rod parts. When the sliding sleeves are pushed by the corresponding return springs, the sliding sleeves and the sliding cover have a tendency to move from the second position to the first position.

4. The seat belt retractor according to claim 3, characterized in that, The base also includes: A gusset plate is arranged at the end of the base away from the webbing outlet, the first end of the gusset plate extends upward from the base and is provided with a slot, the slot cooperates with the snap-fitting portion formed on the connecting portion to snap the connecting portion onto the base.

5. The seat belt retractor according to claim 4, characterized in that, The base also includes: Two undercut parts, the two undercut parts are arranged on both sides of the end of the base away from the ribbon outlet; The connecting portion further comprises: Two undercut plates are arranged at the bottom ends of both sides of the connecting portion and extend downwardly from the connecting portion, and each of the undercut plates is provided with an undercut hole matched with the undercut portion.

6. The seat belt retractor according to any one of claims 1-5, characterized in that, The end of the base away from the webbing outlet extends downward to correspond to the top of the retractor frame, and a plurality of limiting protrusions are arranged at intervals on a side wall facing the retractor frame; The retractor frame also includes: A frame part, the frame part includes a main board and two side boards, the two side boards are arranged at two ends of the main board opposite to each other to form a U-shaped frame, and when the base is installed on the frame part, at least two side boards are pre-installed between the base; A cover plate, which is connected to one end of the two side plates away from the main board, and a plurality of limiting grooves are provided at intervals at the top end of the cover plate, and the plurality of limiting grooves correspond to and are connected in cooperation with the plurality of limiting bumps.

7. The seat belt retractor according to claim 6, characterized in that, Each of the side plates includes: A first pre-installation step, which is arranged on one side of the top end of the side plate close to the cover plate; A second pre-installation step, which is arranged on one side of the top end of the side plate close to the main board and is lower than the first pre-installation step; Wherein, at least the second pre-installation step is turned up to form a curled edge towards the outside of the frame part, and a concave part is formed on one side of the curled edge away from the side plate, and the concave part corresponds to and is connected in cooperation with a clamping block arranged on one end side of the base close to the webbing outlet.

8. The seat belt retractor according to claim 7, wherein, The base further includes: A support part, which is arranged at the bottom end of the base and corresponds to the top end of the second pre-installation step, and is used for supporting one end of the base with the webbing outlet when abutting against the second pre-installation step.

9. The seat belt retractor according to claim 7, characterized in that, The clamping block includes: A clamping plate, which extends from the clamping block in a direction away from the base; The retractor frame further includes: Two end caps, which are correspondingly arranged on the outer sides of the two side plates, and clamping grooves are provided at the top ends of the two end caps, and the clamping grooves correspond to and are arranged in cooperation with the clamping plate, and are used for fixing the base on the retractor frame when the end cap is fixedly arranged on the corresponding side plate.

10. A seat belt retractor, comprising a retractor frame, a reel, a seat belt and a belt guiding assembly. The reel is rotatably fixed on the retractor frame. The first end of the seat belt is wound on the reel. The belt guiding assembly includes a base fixed on the retractor frame. A webbing outlet through which the second end of the seat belt passes is provided on the base. During the process of pulling out or winding in the seat belt, the seat belt can move in a first direction at the webbing outlet. It is characterized in that, The webbing guiding assembly further includes: A slide rail, which is arranged on the base and extends along the first direction; A sliding cover, which is placed on the slide rail, and an opening for the second end of the safety belt to pass through is provided on the sliding cover, and the sliding cover can move between a first position and a second position at the webbing outlet under the action of the slide rail, wherein the first position is the position of the sliding cover when the sliding cover closes the webbing outlet, and the second position is the position of the sliding cover when the sliding cover opens the webbing outlet; A biasing structure, which is arranged on the base and pushes the sliding cover so that the sliding cover and the safety belt have a tendency to move from the second position to the first position.

Images