CN202774563U

CN202774563U - Self-opening umbrella and umbrella middle stick thereof

Info

Publication number: CN202774563U
Application number: CN 201220460617
Authority: CN
Inventors: 陈传扬; 陈亚明
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-09-11
Filing date: 2012-09-11
Publication date: 2013-03-13
Anticipated expiration: 2022-09-11

Abstract

The utility model provides an umbrella middle stick which has the forces of opening and closing an umbrella; the umbrella middle stick comprises an inner tube, a middle tube and an outer tube which are sequentially in sleeve connection in a stretching manner; the middle tube is divided into two cavities; and an umbrella opening spring is correspondingly divided into two sections which are respectively arranged in the two cavities. The two cavities are arranged in the middle tube, and the dual springs replace a single spring to serve as the umbrella opening spring, thus the problem that the stretching length of the single spring is long can be avoided, the forces of opening and closing the umbrella can be balanced, and the technical effect of ensuring smooth umbrella opening and umbrella closing without overlarge umbrella closing force is achieved.

Description

A kind of automatic umbrella and umbrella shaft thereof

Technical field

The utility model relates to automatic umbrella, relates in particular to a kind of umbrella shaft of automatic umbrella.

Background technology

In the umbrella shaft of the automatic umbrella of prior art, adopt single Compress Spring as the power of parachute-opening, as shown in Figure 1, just there is following defective in this more:

1. the external diameter of Compress Spring 4 is subject to the internal diameter size of inner tube, can only be according to the internal diameter design that is slightly less than inner tube, and the internal diameter of middle pipe 2 and outer tube 3 is larger than inner tube, after this will cause Compress Spring 4 to stretch, in middle pipe 2 and outer tube 3 than large space in can't correcting, easily distortion causes blocking that other inner parts or elastic force can not all be brought into play etc., and impact is used normally.So the inner tube inside of the umbrella shaft of prior art generally all need arrange pipe 5, be used for pocketed springs 4 and correcting it.

2. in order to realize reliable parachute-opening effect, the increasing of just must in the useful space of inner tube, trying one's best of the wire diameter of single spring 4 and length, so, required strength causes using inconvenient also in requisition for increasing when closing one's umbrella.It is large that wall scroll spring 4 is stretched out length, and the limited space in the rear umbrella shaft that closes one's umbrella, if consider the power of closing one's umbrella is controlled at less level, then when spring 4 is stretched out fully, its deploying force may deficiency, smoothly parachute-opening.Situation about can not automatically open often occurs in present automatic umbrella in actual use, and part is exactly that this reason causes.

Summary of the invention

The defective that exists for solving prior art, the utility model provides a kind of can take into account parachute-opening and the umbrella shaft of the strength that closes one's umbrella simultaneously, it comprises the inner tube, the tube and the outer tube that connect together successively in scalable mode, be divided into two chambers in the described middle pipe, deployment spring is corresponding to be divided into two sections and to place respectively in two chambers.

Preferably, described two chambers form by the interior plug in being fixedly installed on described middle pipe.

Further preferred, described interior plug is established the first Compress Spring towards a side of inner tube, establishes the second Compress Spring towards a side of outer tube, and the external diameter of described the first Compress Spring is less than the external diameter of described the second Compress Spring.

The utility model also provides a kind of automatic umbrella, comprises the umbrella cover, umbrella frame assembly, umbrella shaft and the handle that connect successively, and wherein said umbrella shaft adopts aforementioned arbitrary described umbrella shaft.

The beneficial effects of the utility model are:

By at middle pipe two-chamber is set, dual spring replaces single spring as deployment spring, can avoid single spring to stretch out the large problem of length, thereby can balance parachute-opening and the strength that closes one's umbrella, reach the technique effect that not only guarantees smooth parachute-opening but also do not need the too large power that closes one's umbrella.

Adopt the two-part Compress Spring, the one, can shorten the length of spring, two is that the external diameter of two sections Compress Springs can be set to according to the internal diameter of inner tube and middle pipe different sizes, thereby correcting spring preferably, the situation such as avoid twisting, block and occur, and can simplify structure and the manufacturing cost of product.

Description of drawings

Fig. 1 is the partial sectional view of the umbrella shaft of prior art, and its inside is provided with the single spring that runs through inner tube, the tube and the outer tube.

Fig. 2 is the partial schematic sectional view of the umbrella shaft structure of an embodiment of the utility model.

The specific embodiment

Below in conjunction with embodiment and contrast accompanying drawing the utility model is described in further detail.

As shown in Figure 2, this umbrella shaft comprises inner tube (not shown), middle pipe 2 and the outer tube 3 that connects together successively in scalable mode, is divided into two chambers in the described middle pipe 2, and deployment spring is corresponding to be divided into two sections and to place respectively in two chambers.Described two chambers form by the interior plug 5 in being fixedly installed on described middle pipe, described interior plug 5 is established the first Compress Spring 41 towards a side of inner tube, establish the second Compress Spring 42 towards a side of outer tube 3, in the situation of the spring that adopts same material to make, the external diameter of described the first Compress Spring 41 and central diameter are less than external diameter and the central diameter of described the second Compress Spring 42.Like this, can be according to the internal diameter situation of inner and outer tubes 3, come the spring of the suitable external diameter size of corresponding selection, reach better matching effect, allow the inside of inner and outer tubes well play the correcting effect, thereby the situation generation such as avoid twist, block.

The position of aforementioned interior plug 5 in middle pipe 2 can suitably arrange according to the concrete selection of the first Compress Spring 41, the second Compress Spring 42.

Certainly, above-mentioned the first Compress Spring 41 and the second Compress Spring 42 also can be considered according to opening the dynamic balance that closes one's umbrella, and the spring of employing different materials, namely the first Compress Spring 41 is different with the coefficient of elasticity of the second Compress Spring 42.

Need to prove: although the umbrella shaft in the present embodiment only depends on preferably correcting spring of inner and outer tubes, in the prior art in umbrella shaft set pipe 5 for correcting remain the automatic umbrella folding and unfolding parts that must have.Because the Main Function of this pipe 5 is except the spring of correcting compression, outside the undesirable conditions such as the spring torsional deformation in preventing from compressing, or cooperate the necessary parts of draw cord system in the automatic umbrella folding and unfolding, its inner circular aperture is held the line of connexon bullet, prevent that it from being scraped by main spring, and when closing one's umbrella, sub warhead is caught on toward being depressed into the position, to allow sub warhead be in SBR in order to deal with next time the folding movable of opening, can be 202311635U referring to publication number specifically, name be called the Chinese utility model patent of " a kind of multi-section automatic opening-closing umbrella and umbrella stand thereof ".

The utility model also provides a kind of automatic umbrella, and it comprises umbrella cover, umbrella frame assembly, umbrella shaft and the handle that connects successively, and wherein said umbrella shaft adopts the described umbrella shaft of previous embodiment.

According to Hooke's law, in elastic limit, the length variations amount Δ x of the elastic force △ F of spring and spring is directly proportional, i.e. △ F=k Δ x, and k is the coefficient of elasticity of material.That is to say that spring is at the initial stage that releases energy and begin to stretch, elastic force is larger, and then elastic force is can be little a lot of extending to final stage, if adopt single Compress Spring, then be difficult to balance parachute-opening dynamics enough large the and dynamics that closes one's umbrella reach contradiction between little.Because, in this limited space of umbrella shaft, the length of spring and external diameter do not have vicissitudinous leeway substantially, if adopt the spring of larger coefficient of elasticity or central diameter to guarantee the reliability of parachute-opening, in the end required strength of stage is larger when then closing one's umbrella, inconvenience and dangerous concerning the user weak, that power is little; If adopt the spring of less coefficient of elasticity or central diameter, the strength that then closes one's umbrella reduces, and has made things convenient for the user to close one's umbrella, but again can be unreliable during parachute-opening.

In the utility model, spring is divided into two sections has then solved this problem, also solved to a certain extent simultaneously the problem that single spring can not correcting.Parachute-opening under collapse state, after pressing the button, the energy of the first Compress Spring 41, the second Compress Spring 42 discharges and stretches in the umbrella shaft, the first Compress Spring 41 extends to inner tube and stretches out namely fully from middle pipe and stop, and 42 of the second Compress Springs extend to middle pipe 2 to be stopped from outer tube 3 interior stretching out namely fully.The coefficient of elasticity k that supposes the first Compress Spring 41 is identical with the coefficient of elasticity of single spring in the prior art, then because total length and the length variations amount Δ x of the first Compress Spring 41 reduce, reduce so when closing one's umbrella, need to compress the power of the first Compress Spring 41, as long as guarantee this power inner tube is stretched out fully from middle pipe 2 is interior; The second Compress Spring 42 is selected larger external diameter, makes things convenient for like this correcting, and the length that from outer tube 3 interior sizes of stretching out required power fully the second Compress Spring 42 is set according to middle pipe 2 can guarantee the reliability of parachute-opening.And show according to experiment, can find the second Compress Spring 42(of suitable external diameter and length can adopt in case of necessity the first Compress Spring 41 and second Compress Spring 42 of different central diameters fully), so that when guaranteeing the reliability of parachute-opening, required power when required power is compressed fully less than single deployment spring again when being compressed to umbrella closing state.

Need to prove that the first Compress Spring 41, the length variations of the second Compress Spring 42 when compression or stretching, extension are subject to the restriction of umbrella shaft structure, its length variations amount is fixed.Such as, under complete deployed condition, between inner tube and the middle pipe 2, all be spacing by structure between middle pipe 2 and the outer tube 3, the first Compress Spring 41, the second Compress Spring 42 all still have certain decrement, but not are stretched over drift.This that is to say that the required maximum, force that closes one's umbrella equals receiving state down spring the greater fully in the first Compress Spring 41 and the second Compress Spring 42.

Above content is in conjunction with concrete preferred embodiment further detailed description of the utility model, can not assert that implementation of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, make without departing from the concept of the premise utility some substituting or obvious modification, and performance or purposes are identical, all should be considered as belonging to protection domain of the present utility model.

Claims

1. umbrella shaft is characterized in that: comprise the inner tube, the tube and the outer tube that connect together successively in scalable mode, be divided into two chambers in the described middle pipe, deployment spring is corresponding to be divided into two sections and to place respectively in two chambers.

2. umbrella shaft as claimed in claim 1 is characterized in that: described two chambers form by the interior plug in being fixedly installed on described middle pipe.

3. umbrella shaft as claimed in claim 1, it is characterized in that: described interior plug is established the first Compress Spring towards a side of inner tube, establishes the second Compress Spring towards a side of outer tube, and the external diameter of described the first Compress Spring is less than the external diameter of described the second Compress Spring.

4. an automatic umbrella comprises the umbrella cover, umbrella frame assembly, umbrella shaft and the handle that connect successively, it is characterized in that: described umbrella shaft adopts the arbitrary described umbrella shaft of claim 1-3.