CN207737247U - A kind of preloader lid anti-retrogression structure - Google Patents

Abstract

The utility model discloses a kind of preloader lid anti-retrogression structure, including lid and guide pipe, the guide pipe passes through the lid and is fixedly mounted；The inside of the lid is equipped with several anti-retrogressions protrusion, the retroversion for preventing preload piece.Advantageous effect is：Using the structure of anti-retrogression protrusion, the pre- next retroversion of preload piece can be effectively avoided, belt slack is made to reduce safety；The preloader cover body structure is simple, effectively raises safety.

Description

A kind of preloader lid anti-retrogression structure

Technical field

The utility model is related to retractor pretensioner lid design fields, and in particular to a kind of preloader lid anti-retrogression knot Structure.

Background technology

Belt with pre-load device is one kind of car belt, with other safety belts except that on belt with pre-load device Pretensioner is increased, pretensioner can perceive certain impact in collision, be acted by generations such as gas-forming agents, Moment furthers the device of safety belt.Belt with pre-load device generally can all be equipped with force-limiting device.Current safety belt pretensioner is pre- next It will appear the case where preload piece is fallen back, be easy to cause the phenomenon of the pre- next relaxation of safety belt, reduce safety.

Utility model content

The purpose of this utility model is that solve the above-mentioned problems and provides a kind of preloader lid anti-retrogression structure, The anti-retrogression structure is equipped with anti-retrogression protrusion on preloader lid can be blocked using anti-retrogression protrusion when preload piece is pre- next Firmly preload piece prevents from falling back.

The utility model is achieved through the following technical solutions above-mentioned purpose：

A kind of preloader lid anti-retrogression structure, including lid and guide pipe, the guide pipe pass through the lid and consolidate Dingan County fills；The inside of the lid is equipped with several anti-retrogressions protrusion, the retroversion for preventing preload piece.

Further, several anti-retrogression protrusions be uniformly distributed along the periphery on the inside of the lid or in order according to Secondary non-uniform Distribution.

Further, the anti-retrogression protrusion is triangular prism structure, and several triangular prisms preload piece along the guide pipe prolongs Direction inclination is stretched, and the lateral surface of the triangular prism is flange arcuate structure.

Further, the anti-retrogression protrusion is ratchet structure, and several ratchets extend along preload piece in the guide pipe Direction tilts.

Further, the anti-retrogression protrusion is integrally machined molding with the lid.

Using the above structure, preload piece along the guide pipe enter the lid in, preload piece along lid on the inside of Circumference is pre-tightened with safety belt, completely pre- next when reaching, and the anti-retrogression protrusion can utilize friction to prevent preload piece It retreats；Avoid preload piece retrogressing that belt slack is made to reduce safety.

To sum up, the beneficial effects of the utility model are：Using the structure of anti-retrogression protrusion, can effectively avoid The pre- next retroversion of preload piece makes belt slack reduce safety；The preloader cover body structure is simple, effectively raises safety Property.

Description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, other drawings may also be obtained based on these drawings.

Fig. 1 is the assembling assumption diagram of the utility model preload piece and lid；

Structure chart when Fig. 2 is the utility model Pre strained state.

The reference numerals are as follows：

1, lid；2, anti-retrogression protrusion；3, preload piece；4, guide pipe.

Specific implementation mode

It, below will be to the technology of the utility model to keep the purpose of this utility model, technical solution and advantage clearer Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work Obtained all other embodiment is put, the range that the utility model is protected is belonged to.

Embodiment one：

Shown in Fig. 1-Fig. 2, the utility model provides a kind of 1 anti-retrogression structure of preloader lid, including 1 He of lid Guide pipe 4, the guide pipe 4 pass through the lid 1 and are fixedly mounted；The inside of the lid 1 is equipped with several anti-retrogressions protrusion 2, the retroversion for preventing preload piece 3.

As preferred embodiment, several anti-retrogression protrusions 2 are uniformly distributed along the periphery of 1 inside of the lid Or non-uniform Distribution successively in order；The anti-retrogression protrusion 2 is triangular prism structure, and several triangular prisms are along the guide pipe 4 3 extending direction of preload piece tilts, and the lateral surface of the triangular prism is flange arcuate structure, into the preload of preloader lid 1 Part 3 can advance along flange arc, when completely it is pre- next, the stupefied of the triangular prism can support the preload piece 3, and prevent It retreats.

Further, the anti-retrogression protrusion 2 is integrally machined molding with the lid 1, facilitates processing.

Using the above structure, preload piece 3 enters along the guide pipe 4 in the lid 1, and preload piece 3 is along lid 1 The circumference of inside is pre-tightened with safety belt, completely pre- next when reaching, and it is pre- that the anti-retrogression protrusion 2 can utilize friction to prevent The retrogressing of tight part 3；Avoid the retrogressing of preload piece 3 that belt slack is made to reduce safety.

Embodiment two：

What is different from the first embodiment is that the anti-retrogression protrusion 2 is ratchet structure, several ratchets are along the guide pipe 4 3 extending direction of interior preload piece tilts, and can increase the friction between preload piece 3 using ratchet structure, improve the property of anti-retrogression Energy.

Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to In this, any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with the power Subject to the protection domain that profit requires.

Claims (5)

1. a kind of preloader lid anti-retrogression structure, it is characterised in that：Including lid and guide pipe, the guide pipe passes through described Lid is simultaneously fixedly mounted；The inside of the lid is equipped with several anti-retrogressions protrusion, the retroversion for preventing preload piece.

2. a kind of preloader lid anti-retrogression structure according to claim 1, it is characterised in that：Several anti-retrogression protrusions It is uniformly distributed along the periphery on the inside of the lid or non-uniform Distribution successively in order.

3. a kind of preloader lid anti-retrogression structure according to claim 2, it is characterised in that：The anti-retrogression protrusion is three Prism structure, several triangular prisms preload piece extending direction along the guide pipe tilts, and the lateral surface of the triangular prism is convex Edge arcuate structure.

4. a kind of preloader lid anti-retrogression structure according to claim 2, it is characterised in that：The anti-retrogression protrusion is spine Toothing, several ratchets are tilted along preload piece extending direction in the guide pipe.

5. a kind of preloader lid anti-retrogression structure according to claim 1, it is characterised in that：The anti-retrogression protrusion and institute It states lid and is integrally machined molding.