Bent pipe assembling mechanism used in safety belt retractor

Abstract

The utility model discloses a bend pipe assembling mechanism used in a safety belt retractor, which comprises a bend pipe, a special-shaped piece capable of being installed at one end of the bend pipe, a special-shaped piece rotating clamping assembly and a bend pipe fixing assembly right opposite to the special-shaped piece rotating clamping assembly, and the special-shaped piece comprises a double-ball and a plastic piece arranged on the double-ball. The special-shaped part rotary clamping assembly comprises a special-shaped part rotary support erected on the platform, a special-shaped part rotary air cylinder arranged on the special-shaped part rotary support and a special-shaped part telescopic air cylinder arranged on the upper side edge of an output shaft of the special-shaped part rotary air cylinder. And the special-shaped piece clamping pieces are arranged on an output shaft of the special-shaped piece telescopic air cylinder and an output shaft of the special-shaped piece rotating air cylinder. The device is high in automation degree, capable of correspondingly placing double balls and plastic parts into the bent pipe in a rotating mode and detecting the installed bent pipe, high in detection accuracy, time-saving and labor-saving, and capable of effectively improving production efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to a safety belt technical field especially relates to a kind of elbow pipe assembling mechanism in safety belt retractor. BACKGROUND

[0002] Vehicle safety belt is the important component in vehicle occupant restraint system, especially in traffic accident, can provide protection for vehicle occupant, avoid occupant to be injured or reduce injury to minimum degree. With the increasing vehicle population, vehicle user is more and more high to the safety performance of vehicle safety belt.

[0003] The traditional vehicle safety belt before the collision of vehicle, because of the gap between safety belt and occupant, safety belt can not effectively adhere to the body of occupant. When collision occurs, the gap between safety belt and occupant delays the time of vehicle safety belt protection, reduces protection effect.

[0004] In order to improve the protection effect of vehicle safety belt, another known pretensioner safety belt, including safety belt pretensioner, the safety belt pretensioner includes pretension trigger mechanism and pretension transmission mechanism, pretension trigger mechanism is usually formed as pyrotechnic trigger mechanism, pretension transmission mechanism usually includes a plurality of mutually successive metal spheres and ball gear fixedly connected with these metal spheres, which can interact with these metal spheres, wherein, when pretension trigger mechanism receives vehicle collision signal, the pyrotechnic generator of pretension trigger mechanism ignites, these mutually successive metal spheres are thus pushed, they are in turn engaged with ball gear, push ball gear, so that the reel assembly fixedly connected with ball gear is rotated towards the direction of winding, thus the safety belt is wound, thereby eliminating the gap between safety belt and occupant, so that vehicle safety belt can start to protect the function of occupant in the early stage of collision, which obviously improves the protection effect of vehicle safety belt.

[0005] In the prior art, double ball is installed on one end of the elbow pipe, and then metal ball is placed, but each component is small as a whole, and the shape of the elbow pipe determines the difficulty of assembly. After assembly, manual detection is required, which increases the detection time and reduces the work efficiency of the entire production process. UTILITY MODEL CONTENTS

[0006] In view of the above shortcomings, the utility model aims to provide an elbow pipe assembling mechanism in safety belt retractor, which has high automation degree, can correspondingly rotate double ball and plastic part into the elbow pipe, and detect the installed elbow pipe, with high detection accuracy, saving time and effort, and effectively improving production efficiency.

[0007] The utility model employs the technical scheme to achieve the above-mentioned purpose:

[0008] A kind of for the elbow pipe assembly mechanism in safety belt reel, including an elbow pipe, the special-shaped part that can be installed on the one end of elbow pipe, the special-shaped part includes a double ball and is provided on double ball One plastic part, further including a special-shaped part rotating clamping assembly erected on platform, and the elbow pipe fixed component that is erected on platform and is opposite special-shaped part rotating clamping assembly, the special-shaped part rotating clamping assembly includes a special-shaped part rotating support erected on platform, a special-shaped part telescopic cylinder is arranged on the side of the output shaft of the special-shaped part rotating cylinder, a special-shaped part clamping piece is arranged on the output shaft of the special-shaped part telescopic cylinder and the output shaft of special-shaped part rotating cylinder.

[0009] As a further improvement of the utility model, the elbow pipe fixed component further includes a special-shaped part sliding table erected on the platform, the special-shaped part sliding table includes a special-shaped part sliding plate arranged on the platform, special-shaped part sliding rails symmetrically arranged on both sides of one end of the special-shaped part sliding plate, a special-shaped part sliding block slidingly arranged on the special-shaped part sliding rails and fixed to the special-shaped part rotating support at the upper end, a special-shaped part rotating support frame arranged on the other end of the special-shaped part sliding plate, the special-shaped part telescopic cylinder is arranged on the side of the special-shaped part rotating support frame, and the output shaft of the special-shaped part rotating cylinder penetrates through the special-shaped part rotating support frame and is connected with the special-shaped part clamping piece.

[0010] As a further improvement of the utility model, the special-shaped part clamping piece is L-shaped as a whole, one end of which is arranged on the output shaft of the special-shaped part telescopic cylinder and the output shaft of the special-shaped part rotating cylinder, and the other end is provided with a special-shaped part clamping groove for placing the special-shaped part.

[0011] As a further improvement of the utility model, an upper surface of one end of the plastic part is formed with a special-shaped part embedding fixing column which can be embedded into one end of the elbow pipe, and one end wall of the elbow pipe is formed with a special-shaped part fixing hole for embedding and fixing the special-shaped part embedding fixing column.

[0012] As a further improvement of the utility model, the special-shaped part embedding fixing column is Y-shaped as a whole.

[0013] As a further improvement of the utility model, the elbow pipe fixed component includes an elbow pipe limiting table erected on the platform and for placing the elbow pipe, and at least one elbow pipe limiting structure is arranged around the outer side of the elbow pipe limiting table.

[0014] As a further improvement of the utility model, the elbow pipe limiting structure includes an elbow pipe limiting telescopic cylinder arranged around the elbow pipe limiting table, an elbow pipe limiting fixed block fixed to the side of the elbow pipe limiting table, and an elbow pipe limiting block arranged on the output shaft of the elbow pipe limiting telescopic cylinder and abutting against the side of the elbow pipe.

[0015] As a further improvement of the utility model, the elbow pipe fixing assembly further comprises an elbow pipe detection structure erected on the platform, the elbow pipe detection structure comprises an elbow pipe detection support erected on the platform and inclined towards the special-shaped piece on the elbow pipe, an elbow pipe detection sliding table arranged on the elbow pipe detection support and opposite to the special-shaped piece on the elbow pipe, and an elbow pipe detection proximity sensor arranged on the elbow pipe detection sliding table.

[0016] The utility model has the advantages of:

[0017] By setting the elbow pipe assembling mechanism to comprise an elbow pipe, a special-shaped piece installable on one end of the elbow pipe, the special-shaped piece comprising a double ball and a plastic piece arranged on the double ball, further comprising a special-shaped piece rotary clamping assembly erected on the platform and an elbow pipe fixing assembly erected on the platform and opposite to the special-shaped piece rotary clamping assembly, the special-shaped piece rotary clamping assembly comprising a special-shaped piece rotary support erected on the platform, a special-shaped piece rotary cylinder arranged on the special-shaped piece rotary support, a special-shaped piece telescopic cylinder arranged on the output shaft of the special-shaped piece telescopic cylinder and the output shaft of the special-shaped piece rotary cylinder, and a special-shaped piece clamping piece, an external mechanism places the assembled special-shaped piece on the special-shaped piece clamping piece of the special-shaped piece rotary clamping assembly, and then the special-shaped piece telescopic cylinder is started to push the special-shaped piece clamping piece with the special-shaped piece to one end of the elbow pipe in the elbow pipe fixing assembly, the special-shaped piece rotary cylinder is started to rotate the special-shaped piece clamping piece into the elbow pipe, thereby completing the whole assembling, which is high in automation degree and effectively improves production efficiency.

[0018] The foregoing is a summary of the utility model technical scheme, and the utility model will be further described in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole schematic view of the utility model;

[0020] Figure 2 It is a structural schematic view of the special-shaped piece;

[0021] Figure 3 It is a structural schematic view of the elbow pipe;

[0022] Figure 4 It is a structural schematic view of the special-shaped piece installed on the elbow pipe;

[0023] Figure 5 It is a structural schematic view of the special-shaped piece rotary clamping assembly;

[0024] Figure 6 It is a structural schematic view of the elbow pipe fixing assembly;

[0025] In the figure: 1, the elbow; 11, the special-shaped part fixing hole; 2, the special-shaped part; 21, double ball; 22, plastic part; 221, special-shaped part embedded fixing column; 3, special-shaped part rotating clamping assembly; 31, special-shaped part rotating support; 32, special-shaped part rotating cylinder; 33, special-shaped part telescopic cylinder; 34, special-shaped part clamping piece; 341, special-shaped part clamping groove; 35, special-shaped part sliding table; 351, special-shaped part sliding plate; 352, special-shaped part sliding rail; 353, special-shaped part sliding block; 354, special-shaped part rotating support frame; 4, elbow fixing assembly; 41, elbow limiting table; 42, elbow limiting structure; 421, elbow limiting telescopic cylinder; 422, elbow limiting fixed block; 423, elbow limiting block; 43, elbow detection structure; 431, elbow detection support; 432, elbow detection sliding table; 433, elbow detection proximity sensor. DETAILED DESCRIPTION

[0026] In order to further clarify the technical means and effects of the present application for achieving the predetermined purpose, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0027] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0029] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] Please refer to Figures 1 to 6The utility model embodiment provides a kind of elbow pipe assembly mechanism in safety belt reel, including one elbow pipe 1, the special-shaped part 2 being installable to one end of elbow pipe 1, the special-shaped part 2 includes a double ball 21 and is provided with one plastic part 22 on double ball 21, further include erecting one special-shaped part rotating clamping assembly 3 on platform, and erecting one elbow pipe fixed assembly 4 on platform and being just opposite special-shaped part rotating clamping assembly 3, the special-shaped part rotating clamping assembly 3 includes erecting one special-shaped part rotating support 31 on platform, is provided with one special-shaped part rotating cylinder 32 on the special-shaped part rotating support 31, is provided with one special-shaped part telescopic cylinder 33 on the output shaft upper side of the special-shaped part rotating cylinder 32, is provided with one special-shaped part clamping piece 34 on the output shaft of the special-shaped part telescopic cylinder 33 and the output shaft of special-shaped part rotating cylinder 32.External mechanism is placed into the special-shaped part clamping piece 34 of the special-shaped part rotating clamping assembly 3 with the special-shaped part 2 of assembled good, then the special-shaped part telescopic cylinder 33 is started, drives the special-shaped part clamping piece 34 with special-shaped part 2 and pushes to in the elbow pipe fixed assembly 4 in the one end of elbow pipe 1, the special-shaped part rotating cylinder 32 is started, drives special-shaped part clamping piece 34 and rotates into the elbow pipe 1, to complete entire assembly, and it is high in degree of automation, effectively improve production efficiency.

[0031] For the specific mode of operation of the elbow pipe fixed assembly 4, as Figure 1 And Figure 5As shown, the pipe fixing assembly 4 further comprises a special-shaped member sliding table 35 arranged on the platform, the special-shaped member sliding table 35 comprises a special-shaped member sliding plate 351 arranged on the platform, special-shaped member sliding rails 352 symmetrically arranged on both sides of one end of the special-shaped member sliding plate 351, a special-shaped member sliding block 353 slidingly arranged on the special-shaped member sliding rails 352 and fixed to the special-shaped member rotating support 31 at the upper end, and a special-shaped member rotating support frame 354 arranged on the other end of the special-shaped member sliding plate 351. The special-shaped member telescopic cylinder 33 is arranged on the side of the special-shaped member rotating support frame 354, and the output shaft of the special-shaped member rotating cylinder 32 penetrates through the special-shaped member rotating support frame 354 and is connected with the special-shaped member clamping piece 34. When the special-shaped member telescopic cylinder 33 is started, the special-shaped member telescopic cylinder 33 presses on the special-shaped member clamping piece 34, pushes the special-shaped member clamping piece 34 towards the direction of the pipe 1, at this time the special-shaped member clamping piece 34 drives the special-shaped member rotating cylinder 32 connected thereto to move forward, so that the special-shaped member rotating cylinder 32 drives the special-shaped member sliding block 353 arranged thereon to slide on the special-shaped member sliding rails 352, thereby realizing the position following change of the special-shaped member rotating cylinder 32. For the resetting mode of the special-shaped member rotating cylinder 32, the special-shaped member sliding plate 351 close to the one end of the special-shaped member rotating cylinder 32 is provided with a telescopic cylinder connected to the special-shaped member rotating support 31, when the special-shaped member rotating cylinder 32 is driven to be displaced, the telescopic cylinder is also started to push the special-shaped member rotating cylinder 32 out, and after the assembly is completed, the telescopic cylinder drives the special-shaped member rotating support 31 to retract, thereby realizing the resetting of the special-shaped member rotating cylinder 32.

[0032] For the specific mode that the special-shaped member clamping piece 34 keeps linkage with the special-shaped member telescopic cylinder 33 when the special-shaped member rotating cylinder 32 drives the special-shaped member clamping piece 34 to rotate, a connecting plate can be arranged on the output shaft of the special-shaped member telescopic cylinder 33, and a shaft or a column or the like is arranged on the end of the special-shaped member clamping piece 34 close to the special-shaped member telescopic cylinder 33, an arc-shaped movable groove is formed on the connecting plate, when the special-shaped member rotating cylinder 32 drives the special-shaped member clamping piece 34 to rotate, the shaft or the column or the like moves in the movable groove, thereby realizing the rotation while ensuring the connection between the special-shaped member clamping piece 34 and the special-shaped member telescopic cylinder 33, which can also be other connection modes, and the above mode is only a preferred solution, which can be arranged according to actual conditions.

[0033] For the specific structure of the special-shaped member clamping piece 34, as shown in the drawings, Figure 5As shown, the profiled part holder 34 is L-shaped as a whole, one end of which is arranged on the output shaft of the profiled part telescopic cylinder 33 and the output shaft of the profiled part rotating cylinder 32, and the other end is provided with a profiled part clamping groove 341 for placing the profiled part, and the external conveying mechanism conveys the assembled profiled part 2 into the profiled part clamping groove 341, so as to clamp and fix the profiled part 2, and the other end of the profiled part holder 34 is arranged on the output shaft of the profiled part telescopic cylinder 33 and the output shaft of the profiled part rotating cylinder 32, so as to ensure the normal driving of the profiled part 2.

[0034] For the specific way of mounting the profiled part 2 on the elbow pipe 1, as shown in Figures 2 to 4 As shown, the upper surface of one end of the plastic part 22 is formed with a profiled part embedding fixing column 221 which can be embedded into one end of the elbow pipe 1, and the wall of one end of the elbow pipe 1 is formed with a profiled part fixing hole 11 for embedding and fixing the profiled part embedding fixing column 221, the profiled part telescopic cylinder 33 drives the profiled part holder 34 to send the profiled part 2 to one end of the elbow pipe 1, and then the profiled part rotating cylinder 32 drives the profiled part holder 34 to rotate the profiled part 2 into one end of the elbow pipe 1, so that the profiled part embedding fixing column 221 of the plastic part 22 in the profiled part 2 is opposite to the position of the profiled part fixing hole 11, and then the profiled part rotating cylinder 32 and the profiled part telescopic cylinder 33 are simultaneously matched, so that the profiled part embedding fixing column 221 of the plastic part 22 in the profiled part 2 is rotated into the profiled part fixing hole 11 of the elbow pipe 1, so as to stably mount the profiled part 2 in the elbow pipe 1, and realize the purpose of mounting the profiled part 2 on the elbow pipe 1. By matching the profiled part embedding fixing column 221 and the profiled part fixing hole 11, the plastic part 22 drives the double ball 21 to be fixed on the elbow pipe, which prevents the displacement of the double ball 21 in the elbow pipe 1 from causing the subsequent safety belt to be unable to be locked, and improves the reliability of the safety belt.

[0035] Preferably, in order to better mount the profiled part 2 on the elbow pipe 1, as shown in Figure 2 and Figure 4 As shown, the profiled part embedding fixing column 221 is Y-shaped as a whole, and the Y-shaped part has good toughness and can withstand large impact load and pressure, which effectively ensures the reliability of mounting the profiled part 2 on the elbow pipe 1.

[0036] For the specific structure of the elbow pipe fixing assembly 4, as shown in Figure 6As shown, the elbow pipe fixing assembly 4 comprises an elbow pipe limiting table 41 erected on the platform and for placing the elbow pipe 1, and at least one elbow pipe limiting structure 42 arranged outside the elbow pipe limiting table 41, respectively. The elbow pipe 1 is conveyed into the elbow pipe limiting table 41 by an external conveying mechanism, and the elbow pipe limiting structure 42 protrudes from the side of the elbow pipe limiting table 41 to limit the elbow pipe 1 in the elbow pipe limiting table 41, thereby fixing the elbow pipe 1 and preventing the elbow pipe 1 from being displaced or falling off from the side.

[0037] For the specific structure of the elbow pipe limiting structure 42, as shown, Figure 6 As shown, the elbow pipe limiting structure 42 comprises an elbow pipe limiting telescopic cylinder 421 arranged around the elbow pipe limiting table 41, an elbow pipe limiting fixed block 422 fixed to the side of the elbow pipe limiting table 41, and an elbow pipe limiting block 423 arranged on the output shaft of the elbow pipe limiting telescopic cylinder 421 and abutting against the side of the elbow pipe. After the elbow pipe 1 is placed in the elbow pipe limiting table 41, the elbow pipe limiting telescopic cylinder 421 is started to drive the elbow pipe limiting block 423 arranged thereon to pass through the elbow pipe limiting fixed block 422 and abut against the side of the elbow pipe 1, thereby fixing and limiting the elbow pipe 1 and preventing the elbow pipe 1 from being displaced or falling off from the side. By arranging the elbow pipe limiting fixed block 422, the elbow pipe limiting block 423 passing through the elbow pipe limiting fixed block 422 is limited by the elbow pipe limiting fixed block 422, which effectively prevents the elbow pipe limiting block 423 from being displaced during the driving process by the elbow pipe limiting telescopic cylinder 421, thereby preventing the side of the elbow pipe 1 from being abutted and limited accurately.

[0038] In order to further improve the yield of finished products, as shown, Figure 6As shown, the elbow pipe fixing assembly 4 further comprises an elbow pipe detection structure 43 arranged on the platform, the elbow pipe detection structure 43 comprising an elbow pipe detection support 431 arranged on the platform and inclined towards the special-shaped part 2 on the elbow pipe 1, an elbow pipe detection slide table 432 arranged on the elbow pipe detection support 431 and directly opposite the special-shaped part 2 on the elbow pipe 1, and an elbow pipe detection proximity sensor 433 arranged on the elbow pipe detection slide table 432. When the special-shaped part 2 is installed on the elbow pipe 1, the elbow pipe detection slide table 432 is started to drive the elbow pipe detection proximity sensor 433 arranged thereon to approach the position of the special-shaped part embedding fixing column 221, so that the elbow pipe detection proximity sensor 433 detects the special-shaped part embedding fixing column 221 and feeds back the detected information to an external control mechanism. The external control mechanism knows the installation of the special-shaped part 2 on the elbow pipe 1 through comparison, so as to distinguish whether it is a good product or not. The defective product is sent to a defective product collecting box for subsequent repair, and the good product continues to be conveyed to the next step, further improving the good product rate of the finished product and improving the production efficiency. The proximity sensor is a conventional part in the art, and its structure and principle are prior art, so it is not described in detail in the embodiment.

[0039] It should be noted that the elbow pipe assembling mechanism for the safety belt retractor disclosed in the utility model is improved in specific structure, and the specific control mode is not the innovation point of the utility model. The telescopic air cylinder, slide table, rotary air cylinder, slide rail, slide block, proximity sensor, sensor and other components involved in the utility model can be general standard components or components known to those skilled in the art, and the structure, principle and control mode thereof are known to those skilled in the art through technical manuals or through conventional experimental methods.

[0040] The above is only a preferred embodiment of the utility model, and does not limit the technical range of the utility model, so other structures obtained by using the same or similar technical features as the above embodiment of the utility model are within the protection range of the utility model.

Claims

1. A tube assembly mechanism for use in a seat belt retractor, comprising a tube, a special-shaped member mountable on one end of the tube, the special-shaped member comprising a double ball and a plastic member provided on the double ball, characterized in that: Also include a special-shaped part rotating clamping assembly erected on the platform, and a bent pipe fixing assembly erected on the platform and opposite to the special-shaped part rotating clamping assembly, the special-shaped part rotating clamping assembly includes a special-shaped part rotating support erected on the platform, a special-shaped part rotating cylinder arranged on the special-shaped part rotating support, a special-shaped part telescopic cylinder arranged on the output shaft of the special-shaped part telescopic cylinder and the output shaft of the special-shaped part rotating cylinder, and a special-shaped part clamping piece arranged on the output shaft of the special-shaped part telescopic cylinder and the output shaft of the special-shaped part rotating cylinder.

2. The elbow assembly mechanism for use in a seat belt retractor according to claim 1, characterized in that: The bent pipe fixing assembly further includes a special-shaped part sliding table erected on the platform, the special-shaped part sliding table includes a special-shaped part sliding plate arranged on the platform, special-shaped part sliding rails symmetrically arranged on both sides of one end of the special-shaped part sliding plate, special-shaped part sliding blocks slidingly arranged on the special-shaped part sliding rails and fixed on the special-shaped part rotating support at the upper end, a special-shaped part rotating support frame arranged on the other end of the special-shaped part sliding plate, the special-shaped part telescopic cylinder is arranged on the side of the special-shaped part rotating support frame, and the output shaft of the special-shaped part rotating cylinder penetrates through the special-shaped part rotating support frame and is connected with the special-shaped part clamping piece.

3. The elbow assembly mechanism for use in a seat belt retractor according to claim 2, characterized in that: The special-shaped part clamping piece is in the shape of L as a whole, one end of which is arranged on the output shaft of the special-shaped part telescopic cylinder and the output shaft of the special-shaped part rotating cylinder, and the other end is provided with a special-shaped part clamping groove for placing the special-shaped part.

4. The elbow assembly mechanism for use in a seat belt retractor according to claim 1, characterized in that: An upper surface of one end of the plastic part is formed with a special-shaped part embedding fixing column which can be embedded into one end of the bent pipe, and one end wall of the bent pipe is formed with a special-shaped part fixing hole for embedding and fixing the special-shaped part embedding fixing column.

5. The elbow assembly mechanism for use in a seat belt retractor according to claim 4, characterized in that: The special-shaped part embedding fixing column is in the shape of Y as a whole.

6. The elbow assembly mechanism for use in a seat belt retractor according to claim 1, characterized by: The bent pipe fixing assembly includes a bent pipe limiting table erected on the platform and for placing the bent pipe, and at least one bent pipe limiting structure arranged on the outer side of the bent pipe limiting table.

7. The elbow assembly mechanism for use in a seat belt retractor according to claim 6, characterized in that: The bent pipe limiting structure includes a bent pipe limiting telescopic cylinder arranged on the bent pipe limiting table, a bent pipe limiting fixed block fixed on the side of the bent pipe limiting table, and a bent pipe limiting block arranged on the output shaft of the bent pipe limiting telescopic cylinder and abutting against the side of the bent pipe.

8. The elbow assembly mechanism for use in a seat belt retractor according to claim 6, characterized in that: The bent pipe fixing assembly further includes a bent pipe detection structure erected on the platform, the bent pipe detection structure includes a bent pipe detection support erected on the platform and inclined towards the direction of the special-shaped part on the bent pipe, a bent pipe detection sliding table arranged on the bent pipe detection support and opposite to the special-shaped part on the bent pipe, and a bent pipe detection proximity sensor arranged on the bent pipe detection sliding table.

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