CN210000283U - type safety belt retractor - Google Patents

Abstract

The utility model discloses an safety belt retractors relates to car technical field, the concrete implementation mode of this safety belt retractor includes retractor support, shroud and casing, wherein, the retractor support with shroud fixed connection, the shroud with casing fixed connection, the casing is indent nature, and the inside shape of casing is the same with the outside shape of shroud.

Description

type safety belt retractor

Technical Field

The utility model relates to the field of automotive technology, especially, relate to kinds of safety belt retractors.

Background

With the continuous development of the automobile industry, people have higher and higher requirements on Noise, Vibration and Harshness (NVH).

The safety belt is a key part for passive safety of the automobile, and the safety belt retractor can generate noise along with vibration of an automobile body in the driving process of the automobile. In order to reduce the noise generated by the seat belt retractor, the prior art generally coats a noise reduction layer, such as a foam layer, a plastic member or a felt, directly on the exterior of the seat belt retractor.

In realizing the utility model discloses the in-process, utility model people discover to have following problem among the prior art at least:

because the noise reduction layer of wrapping up is the lamellar structure that tiles like this, and the safety belt coiler is for having the device of fixed shape, consequently the noise reduction layer is difficult to with the tight laminating of safety belt coiler to the installation degree of difficulty of safety belt coiler has been increased.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the utility model provides an kind of safety belt retractors can reduce the installation degree of difficulty of retractor.

To achieve the above objects, according to aspects of embodiments of the present invention, there is provided a seatbelt retractor including a retractor bracket, a cover, and a housing, wherein,

the retractor bracket is fixedly connected with the cover;

the cover cap is fixedly connected with the shell;

the shell is of a concave type, and the inner shape of the shell is the same as the outer shape of the cover.

Optionally, a limiting groove is arranged on the outer side of the shell;

a limiting bulge is arranged on the side surface of the cover cap;

the limiting grooves correspond to the limiting protrusions in number and positions ;

the limiting groove can be clamped with the limiting protrusion to connect the cover cap and the shell.

Optionally, a connector is arranged on the cover cap, and the connector comprises an th expansion connection part;

the retractor bracket is provided with a th connecting hole;

the th expansion connecting portion may be engaged in the th connecting hole to connect the cover and the retractor bracket.

Optionally, the connector further comprises a fixed connection, wherein,

the fixed connection is formed integrally with the th expansion connection ;

the fixed connection part can be inserted into the th expansion connection part, so that the fixed connection part, the th expansion connection part and the th connection hole are fixedly connected through sliding friction force.

Optionally, the ratio of the area of the inner cross section of the housing to the area of the surface of the retractor bracket in contact with the cover is 0.05-0.90: 1.

Optionally, step includes a fastener;

the connector further includes a constriction formed integrally with the expansion joint ;

the shell is provided with a second connecting hole;

an end of the fastener is insertable into the expansion joint and into contact with the constriction such that the fastener, the expansion joint and the connection hole are fixedly connected by sliding friction, and another end of the fastener is insertable into the second connection hole to connect the cover and the housing by the fastener.

Optionally, the diameter of the end of the fastener is greater than the diameter of the middle of the fastener;

the connector further includes a second expansion joint, the expansion joint, the constriction and the second expansion joint being sequentially body-formed;

the second expansion joint may be engaged in the second coupling hole, and the fastener penetrates the th expansion joint and the second expansion joint to fixedly couple the cover and the housing by a sliding friction force between the fastener, the second expansion joint, and the second coupling hole.

Optionally, the cover cap upper is further provided with a connecting hole platform, the connecting hole platform is integrally formed with the cover cap , the connecting piece is arranged on the connecting hole platform, and the center of the tightening part and the center of the connecting hole platform are overlapped.

Optionally, the fastener comprises a hook part, an th platform part and a th gradual change part, wherein the hook part, the th platform part and the th gradual change part are molded in bodies;

the second connecting hole is a step hole;

the gradual change portion block in inflation connecting portion, and the lower surface of platform portion contacts with the surface of connecting hole platform, the block of trip portion in the step hole, just the top of block trip portion with the mutual block of big step portion in the step hole.

Optionally, the fastener includes a second tapered portion, a skirt portion, and a second platform portion, the second tapered portion, the skirt portion, and the second platform portion being integrally formed;

the second connecting hole is a step hole;

the second gradually-changing portion is clamped in the th expansion connecting portion, the lower surface of the skirt portion is in contact with the outer surface of the connecting hole platform, and the lower surface of the second platform portion is in contact with the outer surface of the large step portion of the stepped hole.

Optionally, the area of the inner cross section of the housing is equal to the area of the surface of the retractor bracket that contacts the cover.

According to another aspect of an embodiment of the present invention, there is provided a seatbelt retractor including a retractor assembly and a housing, wherein,

the housing is wrapped on the retractor assembly;

the casing is the indent type, just the inside shape of casing both sides with the outside shape of coiler assembly both sides is the same.

Optionally, step includes self-tapping screws;

a third connecting hole is formed in the shell;

a connecting hole platform is arranged on the retractor assembly, the connecting hole platform and the retractor assembly are integrally formed, a fourth connecting hole is arranged on the connecting hole platform, and the positions and the number of the third connecting hole and the fourth connecting hole correspond to each other;

the self-tapping screw penetrates through the third connecting hole and the fourth connecting hole, and the inner surface of the platform at the top of the self-tapping screw is in contact with the outer surface of the platform of the connecting hole.

embodiments in the utility model have the following advantage or beneficial effect that set up the casing that has fixed shape outside the shroud, and the inside shape of this casing is the same with the outside shape of shroud, so be convenient for the connection of casing and shroud to the installation of safety belt coiler of being convenient for, that is to say reduced the installation degree of difficulty of safety belt coiler.

The effect of step of the above non-conventional alternative is described below in conjunction with the detailed description.

Drawings

The accompanying drawings are included to provide a better understanding of the present invention and are not intended to constitute an undue limitation on the invention. Wherein:

fig. 1(a) is a schematic structural diagram of seat belt retractors provided by embodiments of the present invention;

fig. 1(b) is a schematic structural diagram of cases provided by embodiments of the present invention;

fig. 1(c) is a schematic structural diagram of covers provided by embodiments of the present invention;

fig. 2(a) is a schematic structural diagram of cases including limiting grooves according to embodiments of the present invention;

fig. 2(b) is a schematic structural diagram of covers including limiting protrusions, provided by embodiments of the present invention;

fig. 3(a) is a schematic position diagram of a th connecting element and a th connecting hole provided by embodiments of the present invention;

fig. 3(b) is a schematic structural diagram of a type of connector provided by embodiments of the present invention;

fig. 3(c) is a schematic position diagram of a th connecting element and a th connecting hole according to another embodiments of the present invention;

fig. 4(a) is a schematic structural diagram of a type fastener provided by embodiments of the present invention;

fig. 4(b) is a schematic structural diagram of a second connector provided by embodiments of the present invention;

fig. 4(c) is a schematic view of the connection between the type fastener and the second type connector provided by embodiments of the present invention;

FIG. 4(d) is a schematic view of another embodiments of the present invention providing a fastener in combination with a second fastener;

fig. 4(e) is a schematic structural diagram of seat belt retractors including th fasteners provided by embodiments of the present invention;

fig. 4(f) is a schematic structural diagram of seat belt retractors including fasteners according to another embodiments of the present invention;

fig. 4(g) is a schematic structural diagram of cases provided by another embodiments of the present invention;

fig. 4(h) is a schematic structural diagram of covers provided by another embodiments of the present invention;

fig. 5(a) is a structural schematic diagram of a second fastener provided by embodiments of the present invention;

fig. 5(b) is a schematic connection diagram of a second fastener provided by embodiments of the present invention;

fig. 5(c) is a schematic structural diagram of a seat belt retractor including a second fastener according to embodiments of the present invention;

fig. 5(d) is a schematic view of another embodiments of the present invention providing a second fastener connection;

fig. 5(e) is a schematic structural diagram of seat belt retractors including a second fastener according to another embodiments of the present invention;

fig. 5(f) is a schematic structural diagram of seat belt retractors including a second fastener according to still another embodiments of the present invention;

fig. 6(a) is a structural schematic view of a third fastener provided by embodiments of the present invention;

fig. 6(b) is a schematic structural diagram of seat belt retractors including a third fastener according to embodiments of the present invention;

fig. 6(c) is a schematic position diagram of kinds of second connecting holes, connecting pieces and connecting holes provided by embodiments of the present invention;

fig. 6(d) is a schematic connection diagram of a third fastener provided by embodiments of the present invention;

fig. 6(e) is a schematic structural diagram of seat belt retractors including a third fastener according to another embodiments of the present invention;

fig. 6(f) is a schematic structural diagram of seat belt retractors including a third fastener according to still another embodiments of the present invention;

fig. 7(a) is a schematic structural diagram of retractor assemblies provided by embodiments of the present invention;

fig. 7(b) is a schematic structural diagram of a housing corresponding to the retractor assembly provided in embodiments of the present invention;

fig. 7(c) is a schematic structural diagram of cases corresponding to retractor assemblies according to another embodiments of the present invention;

fig. 7(d) is a schematic structural diagram of the outer part of the housing corresponding to the retractor assemblies in cases provided by embodiments of the present invention;

fig. 7(e) is a schematic structural diagram of the exterior of the housing corresponding to retractor assemblies according to another embodiments of the present invention;

fig. 8(a) is a schematic position diagram of kinds of third connecting holes and fourth connecting holes provided by embodiments of the present invention;

fig. 8(b) is a schematic connection diagram of the tapping screws provided by embodiments of the present invention;

fig. 8(c) is a schematic structural diagram of types of seatbelt retractors including a self-tapping screw according to embodiments of the present invention;

fig. 8(d) is a schematic structural diagram of seat belt retractors including self-tapping screws according to another embodiments of the present invention;

fig. 8(e) is a schematic structural diagram of types of seatbelt retractors including a tapping screw according to still another embodiments of the present invention;

fig. 8(f) is a schematic structural diagram of types of seatbelt retractors including a tapping screw according to another embodiments of the present invention.

Detailed Description

Exemplary embodiments of the invention are described below with reference to the accompanying drawings, in which various details of embodiments of the invention are included to assist understanding, and which are to be considered exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

As shown in fig. 1(a), the present invention provides seatbelt retractors, which include a retractor bracket 11, a cover 12, and a housing 13, wherein,

the retractor bracket 11 is fixedly connected with the cover 12;

the cover cap 12 is fixedly connected with the shell 13;

the housing 13 is of a concave type, and the inner shape of the housing 13 is the same as the outer shape of the cover 12.

By providing the housing 13 having a fixed shape outside the cover 12 and making the inner shape of the housing 13 the same as the outer shape of the cover 12, the connection of the housing 13 and the cover 12 is facilitated, thereby facilitating the installation of the seatbelt retractor, i.e., reducing the difficulty of installing the seatbelt retractor.

When the shape of the cover 12 and the housing 13 is as shown in fig. 1(a), the inner shape of the housing 13 may be as shown in fig. 1(b), and the outer shape of the cover 12 may be as shown in fig. 1 (c). As can be seen from fig. 1(b) and 1(c), the outer shape of the cover 12 is the same as the inner shape of the housing 13, so that the housing 13 and the cover 12 can be conveniently locked in the installation process of the seatbelt retractor, and the installation of the seatbelt retractor is facilitated.

In order to facilitate the fixation between the housing 13 and the cover 12, the housing 13 and the cover 12 may be connected in a clamping manner, specifically, as shown in fig. 2(a) and 2(b), a limiting groove 131 is disposed on an outer side of the housing 13, a limiting protrusion 121 is disposed on a side surface of the cover 12, the cover 12 and the limiting protrusion 121 are formed integrally, the number and the position of the limiting groove 131 and the limiting protrusion 121 correspond, and the limiting groove 131 and the limiting protrusion 121 may be clamped with each other to connect the cover 12 and the housing 13.

It is understood that the main purpose of the limiting protrusions 121 and the limiting grooves 131 is to connect the housing 13 and the cover 12, so the objects (the cover 12 or the housing 13) of the limiting protrusions 121 and the limiting grooves 131 are not limited, and only the number and the positions of the limiting protrusions 121 and the limiting grooves 1031 are needed to correspond, that is, the limiting protrusions 121 may be disposed on the cover 12 or the housing 13, and correspondingly, the limiting grooves 131 may be disposed on the housing 13 or the cover 12. step , when there are a plurality of limiting protrusions 121 and limiting grooves 131, a part of the limiting protrusions 121 may be disposed on the cover 12, and a part of the limiting grooves 131 corresponding thereto is disposed on the housing 13, and when a part of the limiting protrusions 121 may be disposed on the housing 13, a part of the limiting grooves 131 corresponding thereto is disposed on the cover 12.

Of course, other connections between the cover 12 and the housing 13 are possible, and the connections between the cover 12 and the housing 13, and between the cover 12 and the retractor bracket 11 will be described in further detail at .

In the embodiments of the present invention, the cover 12 is provided with a connecting member 122, the connecting member 122 includes a expansion connecting portion 1221, the retractor bracket 11 is provided with a connecting hole 111, and the expansion connecting portion 1221 can be engaged with the connecting hole 111 to connect the cover 12 and the retractor bracket 11.

In the process of mounting the cover 12 and the retractor bracket 11, the th expansion connecting portion 1221 can be firstly self-adaptively deformed to pass through the th connecting hole 111, then expanded in the th connecting hole 111 and contacted with the inner wall of the th connecting hole 111, and the cover 12 and the retractor bracket 11 are sequentially connected.

In order to improve the connection fastness between the cover 12 and the retractor bracket 11, as shown in fig. 3(b), the connector 122 further includes a fixed connection portion 1222, wherein the fixed connection portion 1222 is integrally formed with the expansion connection portion 1221 , and the fixed connection portion 1222 is inserted into the expansion connection portion 1221 so that the fixed connection portion 1222, the expansion connection portion 1221 and the connection hole 111 are fixedly connected by sliding friction.

During the installation of the cover 12 and the retractor bracket 11, the st expansion joint 1221 expands in the th joint hole 111 and contacts the inner wall of the 0 th joint hole 111, and then the fixed joint 1222 is inserted into the 1 st expansion joint 1221 to fix the 2 th expansion joint 1221 in the th joint hole 111, at which time the st expansion joint 1221 and the fixed joint 1222 are positioned schematically as shown in fig. 3 (c). at this time, the expanded st expansion joint 1221 has the same diameter as that of the fixed joint 1222, that is, the outer surface of the st expansion joint 1221 contacts the inner wall of the th joint hole 111, and the inner surface of the st expansion joint 1221 contacts the outer surface of the fixed joint 1222. therefore, the cover 12 and the retractor 11 are fixedly connected by the sliding friction force between the fixed joint 1222, the st expansion joint 1221 and the th joint hole 111.

In combination with the above embodiment, the cover 12 and the housing 13 can be connected in a snap-fit manner, and at this time, the cover 12 and the retractor bracket are connected through the connecting piece 122, wherein the connecting piece 122 can be integrally formed with the cover 12 , which is convenient for the situation that the parts are lost and cannot be installed, so that is further adopted to reduce the installation difficulty of the seatbelt retractor, in this connection manner, the cover 12 can only partially cover the retractor bracket 11 , and the cover rate is 5% -90%, that is, the ratio of the area of the inner cross section of the housing 13 to the area of the surface of the retractor bracket 11, which is in contact with the cover 12, is 0.05-0.90: 1.

In addition, the cover 12 and the retractor bracket 11, and the cover 12 and the housing 13 can be directly connected by the body-formed fastening member 41, that is, the embodiment of the invention provides that the seatbelt retractor can further step comprises the fastening member 41, the connecting member 122 further step comprises a contraction portion 1223, the contraction portion 1223 is formed with the expansion connecting portion 1221 body-formed, the housing 13 is provided with the second connecting hole 132, the end of the fastening member 41 can be inserted into the expansion connecting portion 1221 and is in contact with the contraction portion 1223, so that the fastening member 41, the expansion connecting portion 1221 and the connecting hole 111 are fixedly connected by sliding friction force, and the other end of the fastening member 41 can be inserted into the second connecting hole 132 to connect the cover 12 and the housing 13 by the fastening member 41.

The fastening member 41 may be formed integrally with the cover 12 or formed separately from the cover 12 by injection molding, the fastening member 41 may be connected to the th expansion part 1221 in the same manner as the connecting member 122 is connected to the th expansion part 1221, and an intermediate portion of the fastening member 41 may be in contact with the constricted portion 1223 of the connecting member 122 when connected, that is, the fastening member 41 may connect the cover 12 and the retractor bracket 11 in the same manner as the connecting member 122, and the fastening member 41 may connect the cover 12 and the housing 13 in a different manner depending on the structure of the fastening member 41.

In embodiments of the present invention, the end of the fastening member 41 has a diameter larger than the middle of the fastening member 41, and the connecting member 122 further comprises a second expansion connecting portion 1224, wherein the expansion connecting portion 1221, the contraction portion 1223 and the second expansion connecting portion 1224 are sequentially shaped like , the second expansion connecting portion 1224 can be engaged with the second connecting hole 132, and the fastening member 41 penetrates the expansion connecting portion 1221 and the second expansion connecting portion 1224 to fixedly connect the cover 12 and the housing 13 by sliding friction force between the fastening member 41, the second expansion connecting portion 1224 and the second connecting hole 132.

The construction of the fastening member 41 is illustrated in fig. 4(a), the construction of the fastening member 41 is illustrated in fig. 4(b), the connection of the retractor bracket 11, the cover 12 and the housing 13 is illustrated in detail by the example of the fastening member 41 being injection molded separately from the cover 12 and the fastening member 122 being integrally molded with the cover 12 . in the connection, the cover 12 and the retractor bracket 11 may be connected first, i.e., the expansion connection 1221 is inserted through the first connecting hole by self-adaptive deformation of the second connecting hole . then, the fastening member 41 is preassembled on the cover 12, i.e., the fastening member 41 is preassembled on the second expansion connection 1224, as illustrated in fig. 4 (c). the second connecting hole 132 on the housing 13 is prepositioned with the end of the fastening member 41, i.e., the second connecting hole 132 is aligned with the end of the fastening member 41. after the housing 13 and the cover 12 are assembled, the fastening member 41 is inserted into the first expansion connection 1221 through the contraction 1223, the middle of the fastening member 41 is in contact with the contraction 1223 of the fastening member 122, the expansion connection 1221 of the retractor 12 is achieved, the fastening member 41 is inserted into the expansion connection 1222, the expansion connection 1224, the expansion connection of the housing 12, the second connecting hole 1224, and the expansion connection 132, and the expansion connection of the retractor bracket 12, and the expansion connection of the retractor bracket 1224 (see.

In this connection, the housing 13 can completely cover the side of the retractor bracket 11 that contacts the cover 12, that is, the housing 13 can be half-wrapped around the retractor bracket 11, that is, the area of the inner cross section of the housing 13 is equal to the area of the surface of the retractor bracket 11 that contacts the cover 12. therefore, when the housing 13 is made of sound absorbing material such as foamed aluminum, most of the noise generated by the cover 12 or the retractor bracket 11 can be absorbed due to the half-wrapping of the retractor bracket by the housing 13, which is beneficial to improve the noise reduction effect of the seatbelt retractor, at this time, the inner shape of the housing 13 can be as shown in fig. 4(g), and the outer shape of the cover 12 can be as shown in fig. 4 (h).

In the embodiments of the present invention, in order to facilitate the connection between the cover cap 12 and the housing 13 and the retractor bracket 11, a connecting hole platform 123 is further disposed on the cover cap 12 at steps, the connecting hole platform 123 and the cover cap 12 are integrally formed, the connecting member 122 is disposed on the connecting hole platform 123, and the center of the tightening portion 1223 and the center of the connecting hole platform 123 coincide with each other.

Based on this, different from the structure of the fastener shown in fig. 4(a), the present invention provides another fastener 41 with structures in another embodiments, as shown in fig. 5(a), the fastener 41 includes a hook portion 411, a platform portion 412 and a gradient portion 413, the hook portion 411, the platform portion 412 and the gradient portion 413 are integrally formed, the second connecting hole 132 is a stepped hole, the gradient portion 413 is engaged with the expansion connecting portion 1221, the lower surface of the platform portion 412 is in contact with the outer surface of the connecting hole platform 123, the hook portion 411 is engaged with the stepped hole, and the top of the hook portion 411 is engaged with a large step portion in the stepped hole.

When the fastener 41 has the structure shown in fig. 5(a), the connecting member 122 has only the expansion connecting portion 1221 and the contraction portion 1223 of the th position, and no expansion connecting portion 1224, in the connecting process, the cover 12 and the retractor bracket 11 may be connected first, i.e., the expansion connecting portion 1221 of the th position is deformed to pass through the connecting hole 111 of the th position, then the fastener 41 is preassembled on the cover 12, i.e., the fastener 41 is preassembled on the expansion connecting portion 1221 of the th position, the end of the fastener 41 is fixed by the contraction portion 1223, and the lower surface of the platform portion 412 of the th position is in contact with the outer surface of the connecting hole platform 123, as shown in fig. 5(b), in the case that the gradual change portion 413 of the passes through the cover 12 and the retractor bracket 11, as shown in fig. 5(c), then the cover 12 and the retractor bracket 11 are assembled, the second fastening member 41 on the cover 13 is aligned with the connecting hole 132 of the cover 13, and then the second fastening member 41 is connected with the retractor bracket 12, as shown in fig. 5(c), and the fastening member 132 is engaged with the connecting hole 132 of the retractor bracket 12, as shown in fig. 5(d, and fig. 5 (d).

In this connection, the housing 13 can also completely cover the side of the retractor bracket 11 that contacts the cover 12, that is, the housing 13 can be half-wrapped around the retractor bracket 11, that is, the area of the inner cross section of the housing 13 is equal to the area of the surface of the retractor bracket 11 that contacts the cover 12.

The utility model discloses embodiments also provide a fastener 41 different from the structure shown in fig. 4(a) and fig. 5(a), as shown in fig. 6(a), this fastener 41 includes second gradual change portion 414, skirt portion 415 and second platform portion 416, second gradual change portion 414, skirt portion 415 and second platform portion 416 are integrated into one piece, second connecting hole 132 is a step hole, second gradual change portion 414 is blocked in inflation connecting portion 1221, and the lower surface of skirt portion 415 contacts with the surface of connecting hole platform 123, the lower surface of second platform portion 416 contacts with the surface of the big step portion of step hole.

When the fastener has a structure as shown in fig. 6(a), the connecting member 122 has only the expansion connecting portion 1221 and the constricted portion 1223 at , but no second expansion connecting portion 1224, the cover 12 and the retractor bracket 11 may be connected first, i.e., the expansion connecting portion 1221 is inserted through the connecting hole 111 at by self-adaptive deformation of the expansion connecting portion , then the housing 13 and the cover 12 are pre-positioned, i.e., the housing 13 is aligned and covered on the cover 12 according to the same structure as the outside of the cover 12 inside the housing 13, as shown in fig. 6(b), where the positions of the connecting holes 132, 122 and correspond to those of the connecting holes 111 at the time of fig. 6(c), and then the fastener 41 is inserted through the connecting holes 132, 122 and in sequence, so that the second gradually-changed portion 414 of the fastener 41 contacts with the expansion connecting portion 1221 at the second , and the lower end portion 415 of the skirt platform 123 contacts with the outer surface 415 of the cover platform 415, and the connecting hole 415 of the main body 13, and the connecting hole 132 is connected to the outer surface of the retractor bracket 12 through the connecting hole 132, the connecting hole 416, and the connecting portion of the second gradually-stepped portion of the retractor bracket 12, as shown in fig. 6(d, the connecting portion 416, the connecting hole 12, the connecting portion of the second gradually-connecting portion 415 of the retractor bracket 12, the fastening member 12, and the.

In this connection, the housing 13 can also completely cover the side of the retractor bracket 11 that contacts the cover 12, that is, the housing 13 can be half-wrapped around the retractor bracket 11, that is, the area of the inner cross section of the housing 13 is equal to the area of the surface of the retractor bracket 11 that contacts the cover 12.

In addition, the housing 13 can also fully cover the retractor bracket 11, as shown in fig. 7(a), 7(b) and 7(c), in another embodiments of the present invention, seat belt retractors are provided, which comprise a retractor assembly 71 and a housing 13, wherein,

the housing 13 is wrapped on the retractor assembly 71;

the housing 13 is concave, and the inner shape of both sides of the housing 13 is the same as the outer shape of both sides of the retractor assembly 71.

In the above embodiment, the housing 13 having a fixed shape is provided at the outer side of the retractor assembly 71, and the inner shape of both sides of the housing is the same as the outer shape of the retractor assembly 71, so that the connection between the housing 13 and the retractor assembly 71 is facilitated, thereby facilitating the installation of the seatbelt retractor, that is, reducing the installation difficulty of the seatbelt retractor.

The schematic structure of the retractor assembly 71 can be as shown in fig. 7(a), and the structure outside the housing 13 can be in various shapes, and only the internal structure thereof is the same as the retractor assembly 71 for easy installation. For example, according to the installation scenario, the corners of the housing 13 may be rounded or chamfered, and when the corners of the housing 13 are rounded, the external structure of the housing 13 is as shown in fig. 7(d), which corresponds to the housing 13 shown in fig. 7 (b); when the corners of the housing 13 are chamfered, the outer structure of the housing 13 is as shown in fig. 7(e), which corresponds to the housing 13 shown in fig. 7 (c).

When the retractor assembly 71 is installed, in addition to mutually clamping the housing 13 and the retractor assembly 17 according to a structure that the shape of the interior of the housing 13 is the same as that of the retractor assembly 71, in order to further increase the connection fastness, the housing 13 and the retractor assembly 71 can be connected through the self-tapping screws 72, specifically, the housing 13 is provided with third connecting holes 133, the retractor assembly 71 is provided with connecting hole platforms 712, the connecting hole platforms 712 are formed with the retractor assembly in a body, the connecting hole platforms 712 are provided with fourth connecting holes 711, the positions and the number of the third connecting holes 133 and the fourth connecting holes 711 correspond, the self-tapping screws 72 penetrate through the third connecting holes 133 and the fourth connecting holes 711, and the inner surface of the top platform of the self-tapping screws 72 is in contact with the outer surface of the connecting hole platforms 712.

When the housing 13 and the retractor assembly 71 are connected by the self-tapping screw 72, the housing 13 and the retractor assembly 17 can be engaged with each other according to the structure of the same shape of the interior of the housing 13 and the retractor assembly 71, at this time, the positions of the third connecting hole 133 on the housing 13 and the fourth connecting hole 711 on the retractor assembly 71 are aligned, as shown in fig. 8(a), and then the connecting portion 721 of the self-tapping screw 72 sequentially penetrates through the third connecting hole 133 and the fourth connecting hole 711, so that the platform portion 722 of the self-tapping screw 72 and the connecting hole platform 712 on the retractor assembly 71 are contacted with each other, as shown in fig. 8(b), and the retractor assembly 71 and the housing 13 are fixedly connected. Wherein, the schematic structural diagrams before and after the housing 13 with the rounded corner is connected with the retractor assembly 71 and the tapping screw 72 are respectively shown in fig. 8(c) (the retractor assembly 71 is not shown in the figure) and fig. 8(d), and the schematic structural diagrams before and after the housing 13 with the chamfered corner is connected with the retractor assembly 71 and the tapping screw 72 are respectively shown in fig. 8(e) (the retractor assembly 71 is not shown in the figure) and fig. 8 (f).

According to the utility model discloses technical scheme sets up the casing that has fixed shape in the shroud or the coiler assembly outside, and the inside shape of this casing is the same with the outside shape of shroud or coiler assembly, and the casing of consequently being convenient for is connected with shroud or coiler assembly to the installation of the safety belt coiler of being convenient for has also reduced the installation degree of difficulty of safety belt coiler.

The above detailed description does not limit the scope of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1, A seat belt retractor, characterized in that, it comprises a retractor bracket (11), a cover (12) and a housing (13),

the retractor bracket (11) is fixedly connected with the cover (12);

the cover cap (12) is fixedly connected with the shell (13);

the shell (13) is concave, and the inner shape of the shell (13) is the same as the outer shape of the cover (12).

2. The seatbelt retractor according to claim 1,

a limiting groove (131) is formed in the outer side of the shell (13);

a limiting bulge (121) is arranged on the side surface of the cover cap (12);

the limiting grooves (131) correspond to the limiting protrusions (121) in number and positions ;

the limiting groove (131) and the limiting protrusion (121) can be clamped with each other to connect the cover cap (12) and the shell (13).

3. The seatbelt retractor according to claim 1,

the cover cap (12) is provided with a connecting piece (122), and the connecting piece (122) comprises an th expansion connecting part (1221);

the retractor bracket (11) is provided with a th connecting hole (111);

the th expansion connecting part (1221) can be engaged with the th connecting hole (111) to connect the cover (12) and the retractor bracket (11).

4. The seatbelt retractor according to claim 3,

the connecting member (122) further includes a fixed connecting portion (1222), wherein,

the fixed connection (1222) is formed integrally with the th expansion connection (1221) ;

the fixing connection part (1222) may be inserted into the th expansion connection part (1221) to fixedly connect the fixing connection part (1222), the th expansion connection part (1221), and the th connection hole (111) by sliding friction.

5. The seatbelt retractor according to any one of claims 1 to 4 and , wherein,

the ratio of the area of the inner cross section of the shell (13) to the area of the surface , which is in contact with the cover (12), on the retractor bracket (11) is 0.05-0.90: 1.

6. The seatbelt retractor according to claim 4,

includes a fastener (41);

the connector (122) further includes a constrictor portion (1223), the constrictor portion (1223) being formed integrally with the expansion joint (1221) ;

a second connecting hole (132) is formed in the shell (13);

an end of the fastening member 41 is inserted into the expansion joint 1221 and contacts the tightening part 1223 so that the fastening member 41, the expansion joint 1221 and the coupling hole 111 are fixedly coupled by sliding friction, and the other end of the fastening member 41 is inserted into the second coupling hole 132 so as to couple the cover 12 and the housing 13 by the fastening member 41.

7. The seatbelt retractor according to claim 6,

the diameter of the end of the fastening piece (41) is larger than that of the middle of the fastening piece (41);

the connector (122) further includes a second expansion joint (1224), the expansion joint (1221), the constriction (1223) and the second expansion joint (1224) being successively body-formed;

the second expansion joint part (1224) may be engaged in the second coupling hole (132), and the fastener (41) penetrates the th expansion joint part (1221) and the second expansion joint part (1224) to fixedly couple the cover (12) and the housing (13) by a sliding friction force between the fastener (41), the second expansion joint part (1224), and the second coupling hole (132).

8. The seatbelt retractor according to claim 6,

a connecting hole platform is arranged on the cover cap (12) at and is integrally formed with the cover cap (12) , the connecting piece (122) is arranged on the connecting hole platform, and the center of the tightening part (1223) and the center of the connecting hole platform are overlapped.

9. The seatbelt retractor according to claim 8,

the fastener (41) comprises a clamping hook part (411), an th platform part (412) and a th gradual change part (413), wherein the clamping hook part (411), the th platform part (412) and the th gradual change part (413) are molded in a body;

the second connecting hole (132) is a stepped hole;

the th gradual change portion (413) is clamped in the th expansion connecting portion (1221), the lower surface of the th platform portion (412) is in contact with the outer surface of the connecting hole platform, the clamping hook portion (411) is clamped in the stepped hole, and the top of the clamping hook portion (411) is mutually clamped with a large stepped portion in the stepped hole.

10. The seatbelt retractor according to claim 8,

the fastener (41) comprises a second gradually-changing part (414), a skirt part (415) and a second platform part (416), wherein the second gradually-changing part (414), the skirt part (415) and the second platform part (416) are formed in a body;

the second connecting hole (132) is a stepped hole;

the second gradually-changing portion (414) is engaged with the -th expansion connecting portion (1221), the lower surface of the skirt portion (415) is in contact with the outer surface of the connecting hole platform, and the lower surface of the second platform portion (416) is in contact with the outer surface of the large step portion of the stepped hole.

11. The seatbelt retractor according to any one of claims 6 to 10 and , wherein,

the area of the inner cross section of the shell (13) is equal to the area of the surface , which is in contact with the cover (12), on the retractor bracket (11).

12, A seat belt retractor, comprising a retractor assembly (71) and a housing (13),

the housing (13) is wrapped on the retractor assembly (71);

the shell (13) is of an inward concave type, and the inner shapes of two sides of the shell (13) are the same as the outer shapes of two sides of the retractor assembly (71).

13. The seatbelt retractor according to claim 12,

includes self-tapping screw (72);

a third connecting hole (133) is formed in the shell (13);

a connecting hole platform is arranged on the retractor assembly (71), the connecting hole platform is integrally formed with the retractor assembly (71) , a fourth connecting hole (711) is arranged on the connecting hole platform, and the positions and the number of the third connecting hole (133) and the fourth connecting hole (711) correspond to each other;

the self-tapping screw (72) penetrates through the third connecting hole (133) and the fourth connecting hole (711), and the inner surface of the top platform of the self-tapping screw (72) is in contact with the outer surface of the connecting hole platform.

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