Retractor with multi-locking-block locking mechanism

Abstract

The utility model discloses a retractor with a multi-locking-block locking mechanism. The problems that an existing retractor is provided with a single locking block, stress is not uniform, and locking is inclined are solved. The winding device comprises a frame assembly, a mandrel assembly and a driving mechanism, the frame assembly serves as a supporting structure of the winding device, the mandrel assembly is used for winding and releasing a braid, a shaft head is at least provided with two locking cavities, a locking block is installed in each locking cavity, and the driving mechanism is provided with installation holes corresponding to the locking blocks. A pin column is arranged on the locking block and is mounted in the mounting hole; the locking device is compact in structure and convenient to use, and by arranging the multiple locking blocks, the locking reliability and safety are improved; and due to the design of the multiple locking blocks, abrasion of a single locking block can be reduced, friction and damage between parts are reduced, and the service life of the locking blocks is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of automobile equipment, and in particular to a retractor with a locking mechanism having multiple locking blocks. Background Art

[0002] A retractor is a device used to wind and store rolled objects, and is widely used in automotive seat belt systems, wire storage, industrial material winding, etc. As an important automotive safety device, its function is to work with the seat belt to secure people in the seat during a collision to reduce the possibility of casualties.

[0003] The traditional retractor is provided with a single locking block, which may cause uneven force and eccentric load when locking. This phenomenon may cause increased wear of the locking block, locking tilt, reduced locking performance, and even affect the reliability and safety of the retractor. Utility Model Content

[0004] To this end, the present application provides a retractor with a locking mechanism having multiple locking blocks, so as to solve the problem that the existing retractor is provided with a single locking block and is prone to uneven force and tilted locking.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A retractor with a multi-locking block locking mechanism comprises: a frame assembly and a spindle assembly;

[0007] The mandrel assembly includes a mandrel and a shaft head, the mandrel is installed inside the frame assembly, the mandrel is used to wind the webbing, and the shaft head is provided at one end of the mandrel, at least two locking cavities are provided along the circumferential direction of the shaft head, and locking blocks are installed inside the locking cavities, and each of the locking blocks can slide out or slide in along the corresponding locking cavity respectively through a driving mechanism;

[0008] The driving mechanism is arranged outside the shaft head, and a mounting hole corresponding to the locking block is opened on the driving mechanism, and a pin is arranged on the locking block, and the pin is installed in the mounting hole.

[0009] Optionally, there are two locking chambers, which are respectively recorded as the first locking chamber and the second locking chamber. Correspondingly, there are also two locking blocks, which are respectively recorded as the first locking block and the second locking block. There are also two mounting holes, which are respectively recorded as the first mounting hole and the second mounting hole.

[0010] Optionally, the shaft head is provided with at least two through holes along the axial direction, and the core shaft is provided with connecting columns inserted into the through holes.

[0011] Optionally, a first locking tooth is provided on an outer side surface of the locking block corresponding to a side close to an inner wall of the frame assembly, and a second locking tooth matched with the first locking tooth is provided on the inner wall of the frame assembly.

[0012] Optionally, the plurality of locking cavities are evenly distributed along the axis of the shaft head;

[0013] The plurality of mounting holes are evenly distributed along the axis of the driving mechanism.

[0014] Compared with the prior art, this application has at least the following beneficial effects:

[0015] Based on further analysis and research on the existing technical problems, the present application provides a retractor with a locking mechanism with multiple locking blocks, including a frame assembly, a core shaft assembly and a driving mechanism. The frame assembly serves as a supporting structure of the retractor, the core shaft assembly is used to wind and release the webbing, at least two locking cavities are installed on the shaft head, a locking block is installed inside each locking cavity, a mounting hole corresponding to the locking block is opened on the driving mechanism, and a pin is provided on the locking block, and the pin is installed in the mounting hole; the present application has a compact structure and is easy to use. By providing multiple locking blocks, the reliability and safety of locking are improved; the design of multiple locking blocks can also reduce the wear of a single locking block, reduce friction and damage between components, and extend the service life of the locking block. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components) based on the technical concepts and exemplary drawings disclosed in the present application.

[0017] Figure 1 A schematic diagram of the structure of a retractor with a locking mechanism of multiple locking blocks provided in one embodiment of the present application;

[0018] Figure 2 for Figure 1 The exploded schematic diagram shown;

[0019] Figure 3 for Figure 1 The structural diagram of the frame assembly, the core shaft assembly and the two locking blocks shown;

[0020] Figure 4 for Figure 1 Schematic diagram of the structure of the central shaft;

[0021] Figure 5 for Figure 1The structure of the middle axis head Figure 1 ;

[0022] Figure 6 for Figure 1 The structure of the middle axis head Figure 2 ;

[0023] Figure 7 for Figure 1 A schematic diagram of the structure of the first locking block and the second locking block;

[0024] Figure 8 for Figure 1 Schematic diagram of the structure of the driving mechanism.

[0025] Description of reference numerals:

[0026] 1. Frame assembly; 11. Second locking tooth;

[0027] 2. Mandrel assembly; 21. Mandrel; 211. Connecting column; 22. Shaft head; 221. First locking cavity; 222. Second locking cavity; 223. Through hole;

[0028] 3. First locking block; 31. First pin; 4. Second locking block; 41. Second pin; 5. First locking tooth;

[0029] 6. Driving mechanism; 61. First mounting hole; 62. Second mounting hole. DETAILED DESCRIPTION

[0030] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0031] In the description of this application: unless otherwise specified, "plurality" means two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0032] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the purpose of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0033] One embodiment of the present application is a retractor having a locking mechanism with multiple locking blocks, such as Figure 1-Figure 8 As shown, it includes: a frame assembly 1, a core shaft assembly 2 and a driving mechanism 6, the frame assembly 1 serves as a supporting structure of the retractor, and the core shaft assembly 2 is used to wind and release the webbing;

[0034] The mandrel assembly 2 includes a mandrel 21 and a shaft head 22. The mandrel 21 is installed inside the frame assembly 1. The mandrel 21 is used to wind the webbing, and one end of the mandrel 21 is provided with a shaft head 22. The shaft head 22 is coaxially connected to one end of the mandrel 21. At least two locking cavities are provided on the shaft head 22 along the circumferential direction; a locking block is installed inside each locking cavity, and each locking block can slide out or slide in along the corresponding locking cavity through the driving mechanism 6;

[0035] The driving mechanism 6 is arranged outside the shaft head 22 . A mounting hole corresponding to the locking block is opened on the driving mechanism 6 . The locking block is provided with a pin column which is installed in the mounting hole.

[0036] Preferably, a first locking tooth 5 is provided on the outer side surface of the locking block corresponding to a side close to the inner wall of the frame assembly 1 , and a second locking tooth 11 matched with the first locking tooth 5 is provided on the inner wall of the frame assembly 1 .

[0037] Preferably, the shaft head 22 is provided with at least two through holes 223 along the axial direction, and the core shaft 21 is provided with a connecting column 211 inserted into the through holes 223 .

[0038] Preferably, the plurality of locking cavities are evenly distributed along the axis of the shaft head 22 ; and the plurality of mounting holes are evenly distributed along the axis of the driving mechanism 6 .

[0039] Preferably, there are two locking chambers, which are respectively recorded as the first locking chamber 221 and the second locking chamber 222; correspondingly, there are also two locking blocks, which are respectively recorded as the first locking block 3 and the second locking block 4, the pin on the first locking block 3 is recorded as the first pin 31, and the pin on the second locking block 4 is recorded as the second pin 41; there are also two mounting holes, which are respectively recorded as the first mounting hole 61 and the second mounting hole 62.

[0040] Of course, the number of the locking chamber, the locking block and the mounting hole is not limited to two, and may also be three or four.

[0041] Further preferably, the first locking cavity 221 and the second locking cavity 222 are evenly distributed along the axis of the shaft head 22 ; the first mounting hole 61 and the second mounting hole 62 are evenly distributed along the axis of the driving mechanism 6 .

[0042] A structure of the driving mechanism 6, for example, includes a ratchet, a pawl, a return spring and a belt-sensitive spring, etc. This part belongs to the prior art and will not be described in detail again.

[0043] The use principle of the above embodiment is as follows:

[0044] Taking two locking blocks as an example, when any function of the belt angle sensor of the retractor starts the locking drive mechanism 6, the webbing continues to be pulled out, and the core shaft assembly 2 rotates relative to the drive mechanism 6, and the first pin 31 on the first locking block 3 and the second pin 41 on the second locking block 4 slide in the first mounting hole 61 and the second mounting hole 62 respectively, and drive the first locking block 3 and the second locking block 4 to slide out of the first locking cavity 221 and the second locking cavity 222 on the shaft head 22, and then the first locking teeth 5 on the outer sides of the first locking block 3 and the second locking block 4 are meshed with the second locking teeth 11 on the frame assembly 1, thereby realizing the locking function, and the reliability and safety of locking are increased by setting the two locking blocks;

[0045] On the contrary, when the webbing is recovered, the core shaft 21 assembly is reversed, the first locking tooth 5 on the outer side of the first locking block 3 and the second locking block 4 is separated from the second locking tooth 11 of the frame assembly 1, and the driving mechanism 6, under the action of its return spring, rotates back to the initial position relative to the shaft head 22, driving the first locking block 3 and the second locking block 4 to slide into the first locking cavity 221 and the second locking cavity 222 on the shaft head 22, thereby releasing the lock.

[0046] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A retractor with a locking mechanism having multiple locking blocks, characterized in that: include: Frame assembly and mandrel assembly; The mandrel assembly includes a mandrel and a shaft head, the mandrel is installed inside the frame assembly, the mandrel is used to wind the webbing, and the shaft head is provided at one end of the mandrel, at least two locking cavities are provided along the circumferential direction of the shaft head, and locking blocks are installed inside the locking cavities, and each of the locking blocks can slide out or slide in along the corresponding locking cavity respectively through a driving mechanism; The driving mechanism is arranged outside the shaft head, and a mounting hole corresponding to the locking block is opened on the driving mechanism, and a pin is arranged on the locking block, and the pin is installed in the mounting hole.

2. The retractor with a multi-locking block locking mechanism according to claim 1, characterized in that: There are two locking chambers, which are respectively recorded as the first locking chamber and the second locking chamber. Correspondingly, there are also two locking blocks, which are respectively recorded as the first locking block and the second locking block. There are also two mounting holes, which are respectively recorded as the first mounting hole and the second mounting hole.

3. The retractor with a multi-locking block locking mechanism according to claim 1, characterized in that: The shaft head is provided with at least two through holes along the axial direction, and the core shaft is provided with connecting columns inserted into the through holes.

4. The retractor with a multi-locking block locking mechanism according to claim 1, characterized in that: The outer side surface of the locking block is provided with a first locking tooth corresponding to a side close to the inner wall of the frame assembly, and the inner wall of the frame assembly is provided with a second locking tooth matched with the first locking tooth.

5. The retractor with a multi-locking block locking mechanism according to claim 1, characterized in that: The plurality of locking cavities are evenly distributed along the axis of the shaft head; The plurality of mounting holes are evenly distributed along the axis of the driving mechanism.

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