CN211468387U - Coiler locking cover and coiler - Google Patents

Abstract

The application discloses coiler locking cover and coiler, wherein, coiler locking cover includes: the cover comprises a cover body, wherein a locking wheel rim is arranged on the bottom surface of the inner side of the cover body, and a plurality of locking structures are distributed on the inner circumferential surface of the locking wheel rim. The locking wheel rim of this embodiment sets up on the cover body, so make the coiler locking cover have the function of locking, also make the locking wheel rim not need the support of other structures just can realize firm, thereby optimized the structure of coiler.

Description

Coiler locking cover and coiler

Technical Field

The application relates to the technical field of automobile equipment, in particular to a retractor locking cover and a retractor.

Background

The retractor is a core component of an automobile safety belt, has an emergency locking function, and can lock the safety belt when the automobile is braked, so that a passenger is fixed on a seat, and the riding safety of the passenger is protected.

Among them, the retractor has many related components, and most of these components are mounted in a housing of the retractor. In the prior art, the retractor is provided with a housing only used for preventing dust from entering into the components inside the housing, and the function is relatively single, which is not beneficial to the optimization of the retractor structure.

SUMMERY OF THE UTILITY MODEL

The application provides a coiler locking cover to solve current coiler casing function singleness relatively, be unfavorable for the problem of the optimization of coiler structure. This application has still applied for a coiler simultaneously.

The application provides a coiler locking cover includes: the cover comprises a cover body, wherein a locking wheel rim is arranged on the bottom surface of the inner side of the cover body, and a plurality of locking structures are distributed on the inner circumferential surface of the locking wheel rim.

Optionally, the locking rim protrudes from the bottom surface of the cover body.

Optionally, the locking rim is recessed in the bottom surface of the cover body.

Optionally, still include the bowl form shrinkage pool, the bowl form shrinkage pool sets up the bottom surface of the cover body, and is located the central axis of locking wheel rim.

Optionally, a central concave hole is further formed in the bottom of the bowl-shaped concave hole.

Optionally, the bowl-shaped concave hole protrudes from the bottom surface of the cover body.

Optionally, the bowl-shaped concave hole is recessed in the bottom surface of the cover body.

Optionally, the locking structure comprises a locking tooth or a locking groove.

The present application further provides a retractor, including: the retractor comprises a ratchet wheel, an inertia block and a retractor locking cover;

the retractor locking cover includes: the locking structure comprises a cover body, a locking wheel ring and a locking mechanism, wherein the bottom surface of the inner side of the cover body is provided with the locking wheel ring, and a plurality of locking structures are distributed on the inner circumferential surface of the locking wheel ring;

the ratchet wheel is buckled on the outer peripheral surface of the locking wheel rim and forms a locking space with the locking wheel rim;

the inertia block is arranged on the radial end surface of the ratchet wheel and is arranged in the locking space; and when in a locking state, the tail end of the inertia block is abutted against the locking structure to realize locking.

Compared with the prior art, the method has the following advantages:

the application provides a coiler locking cover includes: the cover comprises a cover body, wherein a locking wheel rim is arranged on the bottom surface of the inner side of the cover body, and a plurality of locking structures are distributed on the inner circumferential surface of the locking wheel rim. The locking wheel rim of this embodiment sets up on the cover body, so make the coiler locking cover have the function of locking, also make the locking wheel rim not need the support of other structures just can realize firm, thereby optimized the structure of coiler.

Drawings

Fig. 1 is a schematic structural diagram of a retractor provided in an embodiment of the present application;

fig. 2 is an exploded view of a retractor according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a retractor locking cover according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a fixing cover provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a first connecting portion of a retractor spindle according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a second connecting portion of a retractor spindle according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a retractor locking assembly provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a lock block in the retractor locking assembly according to an embodiment of the present application;

fig. 9 is a schematic structural view of a retractor locking mechanism according to an embodiment of the present application;

fig. 10 is a schematic structural view of a ratchet wheel in the retractor locking mechanism provided in the embodiment of the present application;

fig. 11 is a schematic structural diagram of an inertia block in a retractor locking mechanism provided in an embodiment of the present application.

Wherein, the retractor 100, the support frame 1, the limit structure 11, the bolt structure 12,

the retractor locking cover 2, a cover body 21, a first accommodating cavity 211, a second accommodating cavity 212, a locking wheel rim 22, a locking structure 221, a bowl-shaped concave hole 23, a central concave hole 24, a fixed cover 3, a third accommodating cavity 31, a conical concave hole 32, a cover body 33, a retractor mandrel 4, a mandrel main body 41, a first connecting part 42, a second connecting part 43, a linkage wheel 44, a supporting platform 45, an installation groove 451, a connecting end 46, a supporting body 461, a limiting wheel 47, a connecting end 48, a limiting ring 471, a limiting slide 472, a linkage wheel 473, a supporting boss 474 and a coil spring connecting shaft 49;

the retractor locking assembly 5, a locking block 51, a connecting column 52, an elastic piece 53, a ring hook structure 531, a clamping portion 54, a clamping opening 541, a supporting portion 55, a clamping hook structure 551, the retractor locking mechanism 6, a ratchet wheel 61, an inertia block 62, an abutting end 621, an abutting column 6211, a positioning column 6212, a limiting end 622, an arc-shaped supporting portion 623, an opening 6231, an elastic piece 63, a central shaft hole 64, a central supporting boss 65, a connecting shaft 66, a limiting support 67, a spring positioning column 671, a supporting column 672, a limiting portion 68, a first limiting block 681, a second limiting block 682, a limiting sliding groove 69, a coil spring assembly 7, a coil spring end cover 71, a coil spring 72, a vehicle sensing assembly 8, a vehicle sensing fixing seat 81 and a vehicle sensing sensor assembly 82.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of implementation in many different ways than those herein set forth and of similar import by those skilled in the art without departing from the spirit of this application and is therefore not limited to the specific implementations disclosed below.

The embodiment of the application provides a retractor 100, and fig. 1 is a schematic structural diagram of the retractor 100 provided by the embodiment of the application.

Referring to fig. 1 and 2, a retractor 100 provided in the embodiment of the present application includes a support frame 1, a retractor locking cover 2, a fixing cover 3, a retractor spindle 4, a retractor locking assembly 5, a retractor locking mechanism 6, a coil spring assembly 7 and a vehicle sensing assembly 8. Wherein, the dabber main part 41 of coiler dabber 4 sets up in support frame 1, limit structure 11 so that coiler dabber 4 sets up on support frame 1 of the both sides of support frame 1 is run through respectively at its both ends, coiler locking cover 2 and fixed cover 3 are respectively through 12 fixed connection in the both sides of support frame 1 of bolt structure, coiler locking subassembly 5 sets up in coiler locking cover 2, and be connected with one of them end of coiler dabber 4, the other end of coiler dabber 4 is connected in coil spring subassembly 7, coil spring subassembly 7 is established in fixed cover 3, the safety belt twines on the dabber main part 41 of coiler dabber 4.

Specifically, as shown in fig. 1 to 3 in conjunction, the retractor locking cover 2 of the embodiment of the present application includes: the cover body 21, the bottom surface of the inside of the cover body 21 is provided with a locking rim 22, a plurality of locking structures 221 are distributed on the inner circumferential surface of the locking rim 22, and the locking structures 221 can be locking teeth or locking grooves distributed along the inner circumferential surface. In this embodiment, as shown in fig. 3, the cover 21 has a first receiving cavity 211 and a second receiving cavity 212, and the second receiving cavity 212 is disposed at a side of the first receiving cavity 211 and is close to an edge of the cover 21. The first receiving chamber 211 has an approximately circular horizontal cross section throughout, and the first receiving chamber 211 is used for disposing the locking rim 22 and the retractor locking mechanism 6. The second accommodating cavity 212 is used for accommodating the vehicle sensing assembly 8, wherein the vehicle sensing assembly 8 comprises a vehicle sensing fixing seat 81 and a vehicle sensing sensor assembly 82, the vehicle sensing fixing seat 81 is sleeved in the second accommodating cavity 212, and the vehicle sensing sensor assembly 82 is fixedly installed in the vehicle sensing fixing seat 81.

In the present embodiment, as shown in fig. 3, the locking rim 22 may be disposed to protrude from the bottom surface of the cover body 21, and then the locking rim 22 has an outer surface opposite to the inner circumferential surface, and the outer surface is in a smooth state. The locking rim 22 protrudes from the bottom surface of the cover 21 to be matched with the ratchet wheel 61 of the retractor locking mechanism 6, so that the ratchet wheel 61 of the retractor locking mechanism 6 can rotate against the outer peripheral surface of the locking rim 22 and forms a locking space with the locking rim 22.

Of course, in other embodiments of the present invention, the locking rim 22 may be recessed in the bottom surface of the cover 21 (not shown), so that the locking rim 22 has only one inner circumferential surface. At this time, a slideway corresponding to the circumferential edge of the ratchet wheel 61 may be provided at the circumferential edge of the locking rim 22, the width dimension of the slideway corresponding to the thickness of the circumferential edge of the ratchet wheel 61, so that the ratchet wheel 61 of the retractor locking mechanism 6 can rotate against the slideway of the cover 21.

Further, in the present embodiment, the cover 21 is further provided with a bowl-shaped concave hole 23, the bowl-shaped concave hole 23 is provided on the bottom surface of the cover 21 and is located on the central axis of the locking rim 22, and the bowl-shaped concave hole 23 is used for being connected with the connecting end 46 (shown in fig. 5) of the first connecting portion 42 of the spindle main body 41. Wherein, the bottom of the bowl-shaped concave hole 23 is also provided with a central concave hole 24. It can be understood that the bowl-shaped concave hole 23 may be disposed to protrude from the bottom surface of the cover 21, or may be disposed to be recessed into the bottom surface of the cover 21.

Further, in the present embodiment, as shown in fig. 2 and 4 in conjunction, the fixed cover 3 disposed opposite to the retractor locking cover 2 is used to accommodate the coil spring assembly 7, that is, the fixed cover 3 is provided with a third accommodating chamber 31, and the coil spring assembly 7 is disposed in the third accommodating chamber 31. As shown in fig. 4, a tapered concave hole 32 is further provided at a bottom surface position of the fixed cover 3, and the tapered concave hole 32 is used for connecting with a connection end 48 (shown in fig. 6) of the second connection portion 43 of the mandrel main body 41. Wherein, the conical concave hole 32 is coaxially arranged with the bowl-shaped concave hole 23 on the retractor locking cover 2.

It is to be understood that in other embodiments, the bowl-shaped concave hole 23 may be provided on the fixed cover 3 and the tapered concave hole 32 may be provided on the retractor locking cover 2. It is also understood that only the bowl-shaped recessed hole 23 or the tapered recessed hole 32 is provided in both the retractor locking cover 2 and the fixed cover 3. As long as it is used for assembling with the mandrel body 41, the scope of protection of the present application is intended.

The present embodiment provides a retractor locking cover 2 including: the cover body 21 and the bottom surface of the inner side of the cover body 21 are provided with locking rims 22, and a plurality of locking structures 221 are distributed on the inner circumferential surface of each locking rim 22. Wherein, because the locking rim 22 is set up on the cover body 21, so make the retractor locking cover 2 have the function of locking, also make the locking rim 22 not need the support of other structures just can realize stabilizing, thereby optimized the structure of retractor.

Further, in the present embodiment, as shown in fig. 2, 5 and 6, the circumferential end surface of the spindle main body 41 of the retractor spindle 4 is provided with grooves arranged in an array, so that when a seat belt is wound around the circumferential end surface of the spindle main body 41, the friction force between the seat belt and the spindle main body is increased. A first connecting portion 42 and a second connecting portion 43 are provided at both ends of the spindle main body 41, and the first connecting portion 42 and the second connecting portion 43 are provided in the axial direction of the spindle main body 41.

In this embodiment, the first connecting portion 42 includes a linkage wheel 44, a support platform 45 and a connecting end 46, which are disposed adjacent to the mandrel main body 41 in sequence. Wherein, be provided with spacing arch on the circumference terminal surface of coordinated wheel 44, be provided with at least one mounting groove 451 on the circumference terminal surface of brace table 45. The second connecting portion 43 includes a limiting wheel 47 and a connecting end 48 which are sequentially close to the mandrel main body 41, wherein the limiting wheel 47 includes a limiting ring 471, a limiting slide way 472 and a linkage wheel 473 which are sequentially close to the mandrel main body 41, the limiting ring 471 protrudes out of the circumferential end face of the mandrel main body 41, the limiting slide way 472 is arranged between the limiting ring 471 and the linkage wheel 473, and the limiting structure 11 on one side of the support frame 1 is clamped in the limiting slide way 471, so that the mandrel main body 41 is lifted and installed on the support frame 1 in the axial direction. In the present embodiment, a support boss 474 protruding from the limiting wheel 47 is further provided along the central axis direction of the limiting wheel 47, the support boss 474 being used for connecting the wrap spring end cap 71 of the wrap spring assembly 7; a coil spring coupling shaft 49 is further provided between the support boss 474 and the coupling end 48, the coil spring coupling shaft 49 for coupling the coil spring 72 of the coil spring assembly 7. The connecting end 46 of the first connecting portion 42 and the connecting end 48 of the second connecting portion 43 are coaxially disposed.

In the embodiment of the present application, the connecting ends of the two ends of the retractor mandrel 4 may be configured as follows, specifically, the end of at least one connecting end of the retractor mandrel 4 is configured to be a convex bowl shape, and the end can be matched with the corresponding bowl-shaped concave hole 23 of the cover body 21; this connection end is the connection end 46 of the first connection portion 42, referred to as the bowl-shaped connection end; the cover body 21 is the cover body 21 close to the first connecting portion 42, and is referred to as a retractor locking cover 2. In this embodiment, the end of the bowl-shaped connection end is further provided with a support body 461 protruding from the end along the axial direction of the mandrel, wherein the support body 461 may be a rectangular parallelepiped or a cylinder. Correspondingly, the bottom of the bowl-shaped concave hole 23 of the retractor locking cover 2 corresponding to the end of the bowl-shaped connecting end is further provided with a central concave hole 24, and the central concave hole 24 is used for accommodating the support body 461.

In this embodiment, the end of the connecting end opposite to the bowl-shaped connecting end is provided with a cone, and the end can be matched with the corresponding conical concave hole 32 of the cover body 33; this connecting end is the connecting end 48 of the second connecting portion 43, called the tapered connecting end, and the cover 33 is the cover 33 adjacent to the second connecting portion 43, called the fixed cover 3. It is understood that in other solutions of this embodiment, the end of the connecting end opposite to the bowl-shaped connecting end is provided with a convex bowl shape and can be matched with the bowl-shaped concave hole 23 of the cover body 21 which is the retractor locking cover 2. It will also be appreciated that the overall construction of the retractor 100 to which the retractor spindle 4 is mounted is different.

In this application embodiment, set up the end of at least one link of coiler dabber 4 into convex bowl form, this end can cooperate with the bowl form shrinkage pool 23 of the cover body 21 that corresponds to promote the flexibility of coiler dabber 4 pivoted, and reduce the noise of coiler dabber 4 with the coiler casing, and then promoted and used experience.

In an alternative embodiment of the present application, the connecting ends of the two ends of the retractor spindle 4 may be configured as follows (not shown), specifically, the end of at least one connecting end of the retractor spindle 4 is configured as a cone, and the end can be matched with the corresponding conical concave hole 32 of the cover 33; this connecting end is a connecting end of the first connecting portion 42, referred to as a tapered connecting end, and the cover body 33 is a cover body 33 adjacent to the first connecting portion 42, referred to as a fixed cover 3.

In this embodiment, the end of the connecting end opposite to the conical connecting end is provided with a protruding bowl shape, and the end can be matched with the corresponding bowl-shaped concave hole 23 of the cover body 21; this connecting end is a connecting end of the second connecting portion 43, which is referred to as a bowl-shaped connecting end, and the cover body 21 is a cover body 21 close to the second connecting portion 43, which is referred to as a retractor locking cover 2. Wherein, the end of bowl form link still is provided with along dabber axial direction protrusion in terminal supporter, and the bottom of the bowl form shrinkage pool 23 of the coiler locking cover 2 that corresponds with the end of bowl form link still is provided with central shrinkage pool 24, and central shrinkage pool 24 is used for the holding supporter.

It will be appreciated that in other embodiments of this embodiment, the end of the connection end opposite to the tapered connection end may be provided as a cone, which end is capable of mating with the tapered recess 32 of the cover 33, which is the fixed cover 3. It will be appreciated that the overall construction of the retractor to which the retractor spindle 4 is mounted is also different.

In this application optional embodiment, set up the end of at least one link of coiler dabber 4 to the cone, this end can cooperate with the toper shrinkage pool 32 of the cover body 33 that corresponds to promote the flexibility of coiler dabber 4 pivoted, and reduce the noise of coiler dabber 4 with the coiler casing, and then promoted and used and experienced.

Further, in the present embodiment, as shown in fig. 2, 7 and 8 in combination, the retractor locking assembly 5 is attached to one side of the first connecting portion 42 of the retractor spindle 4, specifically between the spindle main body 41 and the ratchet wheel 61 of the retractor locking mechanism 6. Specifically, the retractor locking assembly 5 includes: a locking block 51, a connecting column 52 and an elastic piece 53; the locking block 51 is arranged in the mounting groove 451 of the axial end face of the spindle main body 41 and rotates with the spindle main body 41; the connecting column 52 is arranged on the locking block 51 along the axial direction of the mandrel main body 41 and is inserted into the limit sliding chute 69 of the ratchet wheel 61; an elastic member 53 having one end fixed to the connecting column 52 and the other end connected to the mandrel body 41 and providing an elastic force toward the inner circumference to the locking block 51; when the ratchet wheel 61 is stopped, if the spindle main body 41 rotates, the connecting post 52 moves along the limit sliding groove 69, drives the locking block 51 to move toward the outer periphery away from the central axis of the spindle main body 41, and finally engages with the limit structure of the support frame 1 of the retractor 100, so that the spindle main body 41 cannot rotate continuously.

In the present embodiment, the lock block 51 includes the catching portion 54 and the supporting portion 55, and the peripheral edge of the supporting portion 55 is fitted with the groove bottom of the installation groove 451, so that the lock block 51 can slide in the installation groove 451; wherein, the supporting portion 55 is provided with a protruding hook structure 551; the hook structure 551 extends into the mandrel body 41 to provide a limit for the locking block 51. Of course, in other embodiments, the supporting portion 55 may have a cylindrical shape, and the end surface of the supporting portion 55 is configured as a circular arc end surface. The clamping portion 54 is provided with a clamping interface 541 facing the outside of the mounting groove 451, and the clamping with the limiting structure 11 on the supporting frame 1 is realized through the clamping interface 541, wherein, in the present embodiment, the clamping interface 541 is provided with a tooth shape or a concave-convex structure. Correspondingly, the limiting structure 11 on one side of the support frame 1 is also provided with a tooth shape or a concave-convex structure which can be meshed. In the present embodiment, the clamping portion 54 has at least one of the following shapes: sector, semi-circular, and quarter-circular.

The elastic part 53 is a circular arc-shaped clamp spring, one end of the clamp spring connected with the connecting column 52 is provided with a ring hook structure 531, and the clamp spring is connected to the connecting column 52 through the ring hook structure 531.

The retractor locking assembly 5 provided by the present embodiment includes: a locking block 51, a connecting column 52 and an elastic piece 53; the locking block 51 is arranged in the mounting groove 451 of the axial end face of the spindle main body 41 and rotates with the spindle main body 41; the connecting column 52 is arranged on the locking block 51 along the axial direction of the mandrel main body 41 and is inserted into the limit sliding chute 69 of the ratchet wheel 61; one end of the elastic member is fixed to the connection column 52, and the other end is connected to the mandrel main body 41 and provides an elastic force toward the inner periphery to the lock block 51; when the ratchet wheel 61 is stopped, if the spindle main body 41 rotates, the connecting post 52 moves along the limit sliding groove 69, drives the locking block 51 to move toward the outer periphery, and finally engages with the limit structure 11 on the support frame 1 of the retractor 100, so that the spindle main body 41 cannot rotate continuously. The locking can be accomplished through the removal of locking piece 51 to the locking of the coiler locking subassembly 5 of this application embodiment when locking dabber main part 41, and coiler locking subassembly 5 can be independent of dabber main part 41, and its volume is less, and simple structure can also reduce the complexity that dabber main part 41 made when promoting the nimble degree of locking.

Further, in the present embodiment, the retractor locking mechanism 6, which serves as a hinge connecting the spindle main body 41 and the retractor locking cover 2, can cooperate with the locking block 51 on the spindle main body 41 to complete the vehicle feel locking of the retractor 100, and can cooperate with the locking block 51 on the spindle main body 41 to complete the belt feel locking of the retractor 100. The vehicle sensing locking mechanism is that the vehicle sensing assembly 8 is matched with the retractor locking mechanism 6, so that the locking block 51 on the spindle main body 41 completes locking of the spindle main body 41; the belt-sensing locking means is that the safety belt drives the spindle main body 41 to rotate, and when the rotation speed of the spindle main body 41 is increased, the locking block 51 on the spindle main body 41 can complete locking of the spindle main body 41 through braking of the retractor locking mechanism 6.

Specifically, in the present embodiment, as shown in fig. 2, 9 to 11 in combination, the retractor locking mechanism 6 includes: a ratchet wheel 61, an inertia block 62, and an elastic member 63; wherein, the ratchet wheel 61 is connected to the connecting end of the spindle main body 41 and is sleeved on the locking rim 22 of the retractor locking cover 2. As shown in fig. 10, the ratchet wheel 61 is configured to be a circular groove, the radial end surface of the ratchet wheel 61 is a groove bottom, the circumferential end surface of the ratchet wheel 61 is a groove wall, a central shaft hole 64 is provided at the central position of the radial end surface, and corresponding to the foregoing, the connecting end of the spindle main body 41 connected with the ratchet wheel 61 is the connecting end 46 of the first connecting portion 42, and the connecting end 46 protrudes out of the limiting structure 11 of the support frame 1, so that after the connecting end 46 is sleeved on the central shaft hole 64 of the ratchet wheel 61, the ratchet wheel 61 can be disposed on the outer side of the support frame 1, and further, the ratchet wheel 61 can be installed in the first accommodating cavity 211 of the. In the present embodiment, the ratchet wheel 61 is sleeved on the locking rim 22 of the retractor locking cover 2, specifically, a circumferential end surface of the ratchet wheel 61 is sleeved on the locking rim 22, and the locking rim 22 is accommodated in a groove space of the ratchet wheel 61, so as to form a locking space; and the inner peripheral surface of the circumferential end surface of the ratchet 61 is brought into close proximity with the outer peripheral surface of the locking rim 22.

In this embodiment, as shown in fig. 10, a central support boss 65, a connecting shaft 66, a limit support 67, a limit portion 68 and a limit sliding groove 69 are further provided on the radial end surface of the ratchet wheel 61; wherein, the central supporting boss 65 is arranged on the circumferential end face of the central shaft hole 64, and the central supporting boss 65 has a concave cambered surface; the connecting shaft 66 is disposed at a position close to the concave arc surface of the center support boss 65 with a space therebetween to accommodate the middle region of the inertia mass 62, and the inertia mass 62 is rotatably positioned on the radial end surface of the ratchet wheel 61 by the connecting shaft 66 disposed at the middle region thereof.

In this embodiment, the limiting support 67 and the limiting portion 68 are symmetrically disposed around the central shaft hole 64, wherein the limiting support 67 includes a spring positioning post 671 and a supporting post 672, the spring positioning post 671 is disposed below the supporting post 672, and the supporting post 672 has a cylindrical structure and has an inclination angle with respect to the spring positioning post 671. The limiting portion 68 includes a first limiting block 681 and a second limiting block 682, and a space is provided between the first limiting block 681 and the second limiting block 682. The limit sliding groove 69 is disposed at the side of the limit support 67, and the limit sliding groove 69 can limit the movement of the locking block 51 on the spindle body 41, that is, as mentioned above, one end of the connecting column 52 on the locking block 51 is inserted into the limit sliding groove 69, and the connecting column 62 can swing in the limit sliding groove 69.

In this embodiment, the whole of the inertia block 62 is arc-shaped, the two ends of the inertia block 62 are respectively the abutting end 621 and the limiting end 622, the abutting end 621 is disposed opposite to the limiting support 67, and the limiting end 622 is located in the limiting portion 68, that is, the limiting end 622 swings in the space between the first limiting block 681 and the second limiting block 682. The restricting end 622 is columnar, and has a trapezoidal groove on a side close to the inner peripheral surface of the ratchet 61. The middle region of the inertia block 62 is an arc support 623, the arc support 623 is provided with an opening 6231, the connecting shaft is inserted into the opening to connect the inertia block to the ratchet wheel 61, the inertia block 62 abuts against the central support boss 65 of the ratchet wheel 61 through the arc support 623, and a space for accommodating the locking rim 22 is formed between the inertia block 62 and the inner circumferential surface of the ratchet wheel 61. Wherein, the end of the limiting end 622 is provided with a locking tooth or a ridge-shaped protrusion to cooperate with the locking structure 221 of the locking rim 22, and the locking structure 221 can be a locking tooth or a locking groove.

In the present embodiment, the abutting end 621 of the inertia block 62 includes an abutting column 6211 and a positioning column 6212, and the column head of the abutting column 6211 is a flat column shape and has a small volume. The abutment column 6211 is arranged opposite to the support column 672 of the limiting support 67; the positioning column 6212 is disposed opposite to the spring positioning column 671 of the position limiting support 67. The elastic member 63 is a spring with a cylindrical structure, one end of the elastic member is fixed to the limit support 67, the other end of the elastic member is connected to the abutting end 621, and provides an elastic force far away from the limit support 67 for the inertia block 62. When the rotation speed of the spindle main body 41 is increased, the abutment column 6211 of the abutment end 621 abuts against the support column 672 of the limit support 67, and simultaneously the positioning column 6212 of the inertia block 62 is drawn close to the spring positioning column 671 direction of the limit support 67, and when the elastic piece 63 is compressed, the limiting end 622 protrudes from the limit part 68 along the radial direction and abuts against the locking structure 221 on the locking rim 22, so that the ratchet wheel 61 cannot rotate continuously; if the spindle main body 41 rotates, the connecting post 52 moves along the limiting sliding groove 69, drives the locking block 51 to move towards the outer periphery, and finally engages with the limiting structure 11 on the support frame 1 of the retractor 100, so that the spindle main body 41 cannot rotate continuously.

The embodiment of the application provides a coiler locking mechanism 6, include: a ratchet wheel 61, an inertia block 62, and an elastic member 63; wherein, the ratchet wheel 61 is connected to the connecting end of the spindle main body 41 and is sleeved on the locking rim 22 of the retractor locking cover 2; a limiting support 67 and a limiting part 68 are arranged on the radial end surface of the ratchet wheel 61; the inertia block 62 is rotatably positioned on the radial end surface of the ratchet wheel 61 through a connecting shaft 66 arranged in the middle area of the inertia block 62, the two ends of the inertia block 62 are respectively an abutting end 621 and a limiting end 622, the abutting end 621 is arranged opposite to the limiting support 67, the limiting end 622 is positioned in the limiting part 68, and a space for accommodating the locking rim 22 is formed between the inertia block 62 and the inner circumferential surface of the ratchet wheel 61; one end of the elastic element 68 is fixed on the limit support 67, and the other end is connected to the abutting end 621, and provides elastic force far away from the limit support 67 for the inertia block 62; when the elastic member 63 is compressed, the limiting end 622 protrudes from the limiting portion 68 along the radial direction and abuts against the locking structure 221 on the locking rim 22, so that the ratchet wheel 61 cannot rotate any further. The retractor locking mechanism 6 of the embodiment is simple in structure and small in size, so that the manufacturing cost is reduced, and mass production is facilitated.

The present application provides a retractor 100 including: the retractor locking mechanism comprises a spindle main body 41, a retractor locking assembly 5, a retractor locking mechanism 6 and a retractor locking cover 2 provided with a locking rim 22, wherein the retractor locking assembly 5 comprises a locking block 51 and a connecting column 52 arranged on the locking block 51; the lock block 51 is disposed in the mounting groove 451 of the axial end face of the spindle main body 41, and rotates with the spindle main body 41; the retractor locking mechanism 6 includes a ratchet wheel 61 and an inertia block 62 provided on a radial end surface of the ratchet wheel, the inertia block 62 having a space between an inner peripheral surface of the ratchet wheel 61 to accommodate the locking rim 22; the ratchet wheel 61 is connected to the connecting end 46 of the spindle main body 41 and is sleeved on the locking rim 22 of the retractor locking cover 2; the limit end 622 of the inertia mass 51 is located at the limit portion 68 of the ratchet wheel 61; the connecting column 52 is inserted into the limit sliding groove 69 of the ratchet wheel 61 along the axial direction of the mandrel main body 41; the limiting end 622 protrudes from the limiting portion 68 along the radial direction and abuts against the locking structure 221 on the locking rim 22, so that the ratchet wheel 61 cannot rotate continuously, and if the spindle main body 41 rotates, the connecting column 52 moves along the limiting sliding groove 69, drives the locking block 51 to move towards the outer periphery, and finally engages with the limiting structure 11 on the support frame 1 of the retractor 100, so that the spindle main body 41 cannot rotate continuously. The locking block 51 of the embodiment is arranged on the mandrel main body 41, and locking can be completed by moving the locking block 51, so that the mandrel main body 41 is reduced in size and simple in structure; and the inertia block 62 can complete the locking of the ratchet wheel 61 by matching with the locking rim 22 of the retractor locking cover 2, so that the independent arrangement of the locking rim 22 is reduced, and the structure of the retractor 100 is optimized.

In order to clearly illustrate the working principle of the retractor provided by the embodiment of the present application, the following description is provided in conjunction with a specific application scenario.

The application scene one: when the automobile runs on a flat road surface, a passenger ties a safety belt in the automobile, and the automobile suddenly encounters an obstacle, and is emergently braked, at this time, the inertia block 62 in the retractor locking mechanism 6 starts to move due to the action of inertia force, that is, the abutting column 6211 of the abutting end 621 of the inertia block 62 abuts against the supporting column 672 of the limit support 67, and the positioning column 6212 of the inertia block 62 is closed towards the spring positioning column 671 of the limit support 67, and when the elastic member 63 is compressed, the limiting end 622 protrudes out of the limiting portion 68 along the radial direction and abuts against the locking structure 221 on the locking rim 22, so that the ratchet wheel 61 cannot rotate continuously. After ratchet 61 no longer rotates, because the passenger can be with the help of self inertia in order to drive the safety belt, thereby make the dabber main part 41 of connecting the safety belt continue to rotate, so that the locking piece 51 that sets up in the mounting groove 451 of dabber main part 41 continues to move, because the removal of locking piece 51, then the spliced pole 52 that connects on locking piece 51 moves along spacing spout 69, drive the outside week of locking piece 51 and remove, and finally with the limit structure 11 block on the support frame 1 of coiler 100, thereby make dabber main part 41 unable continuation rotation, and then restricted the slip of safety belt, passenger's safety has been ensured.

Application scenario two: when the automobile suddenly jolts, the limiting arm in the automobile feeling component 8 is lifted by the gravity center ball, and the limiting arm is clamped on the limiting teeth on the periphery of the ratchet wheel 61, so that the ratchet wheel 61 cannot rotate continuously. After ratchet 61 no longer rotates, because the passenger can be with the help of self inertia in order to drive the safety belt, thereby make the dabber main part 41 of connecting the safety belt continue to rotate, so that the locking piece 51 that sets up in the mounting groove 451 of dabber main part 41 continues to move, because the removal of locking piece 51, then the spliced pole 52 that connects on locking piece 51 moves along spacing spout 69, drive the outside week of locking piece 51 and remove, and finally with the limit structure 11 block on the support frame 1 of coiler 100, thereby make dabber main part 41 unable continuation rotation, and then restricted the slip of safety belt, passenger's safety has been ensured.

Although the present application has been described with reference to the preferred embodiments, it is not intended to limit the present application, and those skilled in the art can make variations and modifications without departing from the spirit and scope of the present application, therefore, the scope of the present application should be determined by the claims that follow.

Claims (8)

1. A retractor locking cover, comprising: the locking structure comprises a cover body, a locking wheel ring and a locking mechanism, wherein the bottom surface of the inner side of the cover body is provided with the locking wheel ring, and a plurality of locking structures are distributed on the inner circumferential surface of the locking wheel ring; the locking structure is used for being abutted against an inertia block of the locking mechanism so as to lock the locking mechanism;

further comprising: the bowl-shaped concave hole is formed in the bottom surface of the cover body and is positioned on the central axis of the locking rim; the bowl-shaped concave hole is used for being connected with the connecting end of the first connecting part of the mandrel main body.

2. The retractor locking cover according to claim 1, wherein the locking rim is provided to protrude from a bottom surface of the cover body.

3. The retractor locking cover according to claim 1, wherein the locking rim is recessed in a bottom surface of the cover body.

4. The retractor locking cover according to claim 1, wherein a center recessed hole is further provided at a bottom of the bowl-shaped recessed hole.

5. The retractor locking cover according to claim 1, wherein the bowl-shaped concave hole is provided to protrude from a bottom surface of the cover body.

6. The retractor locking cover according to claim 1, wherein the bowl-shaped concave hole is provided recessed in a bottom surface of the cover body.

7. The retractor locking cover according to claim 1, wherein the locking structure includes a locking tooth or a locking groove.

8. A retractor, comprising: the retractor comprises a ratchet wheel, an inertia block and a retractor locking cover;

the retractor locking cover includes: the locking structure comprises a cover body, a locking wheel ring and a locking mechanism, wherein the bottom surface of the inner side of the cover body is provided with the locking wheel ring, and a plurality of locking structures are distributed on the inner circumferential surface of the locking wheel ring; the locking structure is used for being abutted against an inertia block of the locking mechanism so as to lock the locking mechanism;

the ratchet wheel is buckled on the outer peripheral surface of the locking wheel rim and forms a locking space with the locking wheel rim;

the inertia block is arranged on the radial end surface of the ratchet wheel and is arranged in the locking space; when in a locking state, the tail end of the inertia block abuts against the locking structure to realize locking;

further comprising: the bowl-shaped concave hole is formed in the bottom surface of the cover body and is positioned on the central axis of the locking rim; the bowl-shaped concave hole is used for being connected with the connecting end of the first connecting part of the mandrel main body.

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