CN208355339U - The connection structure of hose for electric vacuum cleaner - Google Patents
The connection structure of hose for electric vacuum cleaner Download PDFInfo
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- CN208355339U CN208355339U CN201721191344.0U CN201721191344U CN208355339U CN 208355339 U CN208355339 U CN 208355339U CN 201721191344 U CN201721191344 U CN 201721191344U CN 208355339 U CN208355339 U CN 208355339U
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- hose
- inner cylinder
- close
- outer cylinder
- cylinder
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 39
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 20
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- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000000470 constituent Substances 0.000 claims abstract description 8
- 230000009975 flexible effect Effects 0.000 claims description 64
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 claims description 4
- 230000008878 coupling Effects 0.000 abstract description 3
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- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 4
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Landscapes
- Electric Vacuum Cleaner (AREA)
Abstract
The connection structure of the utility model offer hose for electric vacuum cleaner.In electric cleaner in the hose for being formed with connecting elements on hose, the resistance to ag(e)ing of the coupling part of electric cleaner hose is improved.The end of electric cleaner hose (2) is connect with connecting elements (3).Connecting elements has inner cylinder (31), and inner cylinder is inserted into the inside of hose.Outer cylinder (32) are set in a manner of covering the hose peripheral side of the part inserted with inner cylinder, inner barrel and outer barrel, which mutually forms, to be integrated.Outer cylinder is integrally formed by the injection molded of synthetic resin in a manner of being close to hose outer peripheral surface.The synthetic resin for constituting outer cylinder is softer than the constituent material of inner cylinder, and the end (OE) in the close hose center of outer cylinder is configured to the end (IE) in the close hose center than inner cylinder close to hose center.In the end in the close hose center of inner cylinder, the peripheral side of end is chamfered or rounded corner.
Description
Technical field
The electricity for being connected with connecting elements the utility model relates to the end in hose for electric vacuum cleaner and being formed as one
The connection structure of dynamic hose for used dust collector.
Background technique
Electric dust collector uses flexible hose.When the flexible hose bulk end in such hose for electric vacuum cleaner
When interface component (being also recorded as " connecting elements " below) is formed as one by portion in advance, it can be realized and connecting elements is utilized
The attended operation of hose is very easily.In recent years, it in the integrated technique of flexible hose and connecting elements, actually answers
With following technology: passing through the injection molded skill for being referred to as so-called coating and injection moulding (overmolding) forming or being insert-molded
Hose main body end and connecting elements are formed as one and obtain hose by art.In the injection molded technology,
To the hose main body end of flexible hose inserted with the connecting elements made in the state of, by hose end and connection structure
Part imported into the injection molded for inside mold for injection molding and carrying out resin, be molded resin is utilized, by hose end and company
Connection member is formed as one.
For example, patent document 1 records following technology: using being insert-molded, will there is the hose of lip in hose inner circumferential
End be formed as one relative to interface component (connecting elements).Patent document 1 records following technology: carrying out time
And hose end defined length and after lip end is integrally formed at the processing of hose, will in being insert-molded process
The hose is integrally formed at interface component.According to the structure, the increase of the flow resistance of hose is prevented, the accumulation of foreign matter is prevented
Suffer from possible trouble.
Citation
Patent document 1: Japanese Unexamined Patent Publication 2012-255518 bulletin
In electric dust collector hose, flexible hose not only stretches, and the various inputs such as is also bent, is stretched.It can
Flexible hose seeks to cope with these inputs without damaged resistance to ag(e)ing.
However, the endurance for improving hose whiles maintaining the pliability etc. of hose exists in flexible hose
The limit.Become soft especially with hose, hose is presented and is easy breakage at the link position connecting with above-mentioned connecting elements
Trend.
Utility model content
The purpose of the utility model is to provide a kind of resistance to ag(e)ing of hose that can be improved coupling part, electronic
The connection structure of hose for used dust collector and connecting elements.
Inventor's further investigation as a result, obtaining following opinion: connect with hose end and the connection that is formed as one
Component has inner barrel and outer barrel, will be made of to the outer cylinder of the peripheral part injection molded of hose end the material softer than inner cylinder, and
And so that outer cylinder is longer than inner cylinder towards hose center side, inner cylinder end is furthermore set as specific mode, thus improves hose master
The resistance to ag(e)ing for the part that body is connect with connecting elements, to complete the utility model.
The utility model provides a kind of connection structure of hose for electric vacuum cleaner, is by the end of hose for electric vacuum cleaner
The structure that portion is connect with connecting elements, which is characterized in that hose for electric vacuum cleaner is spiral helicine intensive aspect and pliability
The hose that hose wall is formed as one, the connecting elements have inner cylinder, in a manner of the periphery of the end of hose covering inner cylinder
Inner cylinder is inserted into the inside of hose, also, covers the hose peripheral side of the part inserted with inner cylinder in the connecting elements
Mode outer cylinder is set, inner barrel and outer barrel, which mutually forms, to be integrated, and the outer cylinder is passed through in a manner of being close to hose outer peripheral surface
The injection molded of synthetic resin and it is integrally formed, the synthetic resin for constituting the outer cylinder is softer than the constituent material of the inner cylinder, institute
The end for stating the close hose center of outer cylinder is configured to, more central close to hose than the end in the close hose center of the inner cylinder,
In the end in the close hose center of the inner cylinder, the peripheral side of end is chamfered.(the first technical solution).
On the basis of the first technical solution, it is preferable that in the end in the close hose center of the inner cylinder, end
The rounded angle in peripheral side (the second technical solution).On the basis of the first technical solution or the second technical solution, it is preferable that will
The end in the close hose center of the outer cylinder is configured than the end in the close hose center of the inner cylinder close to hose center
Distance is set as L and the internal diameter of the hose is set as D, at this point, 0.05≤L/D≤0.5 (third technical solution).In addition,
One technical solution is into third technical solution on the basis of any technical solution, it is preferable that outer cylinder by A type durometer hardness be 60~
90 degree of synthetic resin constitutes (the 4th technical solution).
Utility model effect
Connection structure (the first technical solution, the second technical side of hose for electric vacuum cleaner according to the present utility model
Case), improve the resistance to ag(e)ing for the part that hose main body is connect with connecting elements.
In addition, if further increasing hose main body and connecting elements as third technical solution, the 4th technical solution
Coupling part resistance to ag(e)ing.
Detailed description of the invention
Fig. 1 is the partial sectional view for showing the hose for electric vacuum cleaner connection structure of first embodiment.
Fig. 2 is the deformation state shown when applying load to the hose for electric vacuum cleaner connection structure of first embodiment
Cross-sectional view.
Fig. 3 is the manufacture work for showing the hose of the hose for electric vacuum cleaner connection structure with first embodiment
The diagrammatic cross-section of a part of sequence.
Fig. 4 is the manufacture work for showing the hose of the hose for electric vacuum cleaner connection structure with first embodiment
The diagrammatic cross-section of a part of sequence.
Fig. 5 is the manufacture work for showing the hose of the hose for electric vacuum cleaner connection structure with first embodiment
The diagrammatic cross-section of a part of sequence.
Fig. 6 is the manufacture work for showing the hose of the hose for electric vacuum cleaner connection structure with first embodiment
The diagrammatic cross-section of a part of sequence.
Fig. 7 is the manufacture work for showing the hose of the hose for electric vacuum cleaner connection structure with first embodiment
The diagrammatic cross-section of a part of sequence.
Fig. 8 is the manufacture work for showing the hose of the hose for electric vacuum cleaner connection structure with first embodiment
The diagrammatic cross-section of a part of sequence.
Fig. 9 is the manufacture shown in the hose of the hose for electric vacuum cleaner connection structure with first embodiment
The schematic diagram of the structural example of interior mold used in process.
Description of symbols:
1 hose；
2 flexible hoses (hose main body)；
21 intensive aspects；
22 hose walls；
3 connecting elements；
31 inner cylinders；
32 outer cylinders；
33 interconnecting pieces；
M connecting elements center line；
Mold in ID；
CD cavity mold；
C chamber.
Specific embodiment
Hereinafter, being illustrated referring to attached drawing to the embodiments of the present invention.The utility model is not limited to following
Shown in other embodiment, its specific mode etc. can also be changed and be implemented.As first embodiment, to can
In the case that flexible hose configuration is between electric dust collector main body and on hand operation portion, electric dust collector flexible hose
The embodiment connecting via connecting elements with electric dust collector main body is illustrated.Fig. 1 shows first embodiment
The partial sectional view of hose for electric vacuum cleaner connection structure.It should be noted that Fig. 1 shows the top half of attached drawing with section
And lower half portion is shown with appearance.For the display of section, appearance in attached drawing, Fig. 3 to Fig. 8 is also identical.Hereinafter, at this
In specification, refer to close to hose center or hose center side, it is opposite with having 2 end of flexible hose of connecting elements 3
Side, that is, Fig. 1 in flexible hose 2 left side.
In electric dust collector, hose 1 is used as to be connected by main body of dust collector and on hand between operation portion (operation handle)
The hose of knot and use.In the end of hose 1, hose for electric vacuum cleaner 2 is (hereinafter, be also recorded as " flexible soft
Pipe ") it connect and is formed as one with connecting elements 3.Via the connecting elements 3 by flexible hose 2 and main body of dust collector etc.
Connection.Connecting elements 3 can only be set to one end of flexible hose 2, can also be set to both ends.
Hose for electric vacuum cleaner 2 has spiral helicine intensive aspect 21.Intensive aspect 21 and the hose wall 22 with pliability
It is formed as one.Hose wall can be substantially smooth cylindrical shape, be also possible to be formed as the corrugated tube shape of concave-convex waveform.It is preferred that
Ground, as the hose 2 of present embodiment, by configure intensive aspect 21 be partially toward hose periphery it is outstanding in a manner of, make spiral
Intensive aspect 21 and the hose wall of shape are formed as one.
The constituent material of hose wall 22 is there is no particularly limiting, for example, can be by flexible vinyl chloride resin, polyurethane tree
Synthetic resin as rouge constitutes hose wall 22.The constituent material of intensive aspect 21 is there is no particularly limiting, for example, can lead to
Resin covering steel wire, metal wire (especially steel wire), wire rod for being formed by synthetic resin etc. are crossed to constitute helical form intensive aspect 21.
As in the present embodiment, helical form intensive aspect 21 is preferably the steel wire covered by resin.
It should be noted that the manufacturing method of flexible hose 2 as described above is well known.
The connecting elements 3 connecting with the end of flexible hose 2 has inner cylinder 31 and outer cylinder 32.Inner cylinder 31 and outer cylinder 32 divide
It is not cylindrical.In a coupled condition, inner cylinder 31 is inserted in a manner of the periphery of the end of flexible hose 2 covering inner cylinder 31
Enter the inside of hose 2.Although being not required, the inner peripheral surface of preferred flexible hose 2 is engaged with the outer peripheral surface of inner cylinder 31.
Outer cylinder 32 is set as covering the peripheral side of the flexible hose 2 of the part inserted with inner cylinder 31.In addition, inner cylinder 31 with
Outer cylinder 32, which mutually forms, to be integrated.The integration of inner cylinder 31 and outer cylinder 32 can be based on mechanical engagement, screw, chimeric etc.
It realizes, can also be realized by each synthetic resin mutual deposition both constituted.As described later, due to outer cylinder 32
It is formed using so-called be insert-molded, it is preferred that the resin being molded is entered set on inner cylinder side when being insert-molded
Recess, hole, and outer cylinder 32 is packed in the peripheral part for being integrally formed with the component of inner cylinder 31, to make inner cylinder 31 and the mutual shape of outer cylinder 32
It is integrally formed.
Outer cylinder 32 is integrally formed by synthetic resin in a manner of being tightly attached to the outer peripheral surface of hose 2.Pass through the inner circumferential of outer cylinder 32
Face is close to the outer peripheral surface of hose 2, thus at the close part the end OE in the close hose center with outer cylinder 32, hose 2
Actually supported by outer cylinder 32.
Although being not required, the outer peripheral surface of preferred flexible hose 2 is engaged with the inner peripheral surface of outer cylinder 32.These connect
The bonding that can be using binder etc. is closed, can also be realized by thermally welded.
The synthetic resin for constituting the outer cylinder is softer than the constituent material of the inner cylinder.Preferably, the resin of outer cylinder is constituted
Hardness is calculated as 60~90 degree with A type durometer hardness.In addition, in the case where inner cylinder is also made of synthetic resin, it is preferable that with A
Type durometer hardness meter, constitutes low 3 degree of hardness or more of the resin of the hardness of the resin of outer cylinder than constituting inner cylinder, and more preferably low 5
Degree or more.
In addition, though be not required, in the connecting elements 3 of the opposite side of the side for being equipped with inner cylinder 31 and outer cylinder 32
End is equipped with interconnecting piece 33.Interconnecting piece 33 is installed on operation handle, main body of dust collector.There is no special for the concrete shape of interconnecting piece 33
It does not limit, is determined according to the shape of object side member.In addition, interconnecting piece and object side member (operation handle etc.) can also
With integrally formed.
The inner cylinder 31 of connecting elements 3 and the material of interconnecting piece 33 are constituted there is no particularly limiting, chlorine can be used for example
Synthetic resin materials, the metal materials such as vinyl (especially hard vinyl chloride resin) etc..As the resin for constituting outer cylinder 32
Material, as long as capableing of the resin of injection molded, such as can be using thermoplastic resins, thermoplastic such as flexible vinyl chloride resins
Property elastomer (for example, olefin series thermoplastic elastomer etc.).The resin material for constituting outer cylinder 32 is also possible to polyurethane resin etc.
The heat-curing resins such as reaction resin, rubber.Near the especially preferably at least end OE in the close hose center of outer cylinder 32
It is formed by the soft resin of the constituent material than inner cylinder.In addition, the resin material for constituting outer cylinder 32 is preferably capable and constitutes hose
The material of wall 22, the resin material for constituting inner cylinder 31 be thermally welded or the resin material of bonding.
In connecting elements 3, the end OE in the close hose center of outer cylinder 32 is configured to, than in the close hose of inner cylinder 31
Entreat the end IE in (left side in Fig. 1) close to hose central distance L.That is, outer cylinder 32 is set as compared with inner cylinder 31 towards in hose
Entreat side longlyer prominent.
It is further preferred that the internal diameter of flexible hose 2 is set as D, distance L is made to meet the relationship of 0.05≤L/D≤0.5,
It is highly preferred that meeting the relationship of 0.1≤L/D≤0.3.In typical home-use electric dust collector, representative hose it is interior
Diameter is 25~50mm or so.In such hose, distance L be preferably 2mm or more and 20mm hereinafter, especially preferably 4mm with
Upper and 12mm or less.
Furthermore it is preferred that the spacing of the spiral of the intensive aspect 21 of flexible hose 2 is set as p, the close hose of outer cylinder 32
The end OE in center is configured to, than inner cylinder 31 close hose center end IE close to hose center 0.8p or more (that is, L >=
0.8p)。
In addition, the peripheral side of the end of inner cylinder is chamfered at the end IE in the close hose center of inner cylinder 31.Alternatively,
At the end IE of inner cylinder 31, the rounded angle in the peripheral side of end.That is, the end IE in the close hose center of inner cylinder 31, soft
The ora terminalis of pipe the innermost side is configured to the ora terminalis than hose the outermost side close to hose center.The angle of chamfering is the face being chamfered
Angle formed by central axis m with inner cylinder 31 does not limit particularly, but preferably 35 degree or more and 75 degree are hereinafter, particularly preferably
It is 45 degree or more and 70 degree or less.The 0.3 of the wall thickness for being preferably sized to inner cylinder 31 of size, fillet on the radial direction of chamfering
Times or more and 0.8 times or less.In addition, the size of chamfering, the size of fillet for example preferably C0.5~C2.5 (mm), R0.8~
R3.0(mm)。
Hose 1 with above-mentioned connection structure can for example be manufactured by manufacturing method below.Firstly, in advance
Manufacture flexible hose 2.In addition, using injection molded etc. and the inner cylinder 31 of previously fabricated connecting elements 3 and interconnecting piece 33
Part.
Prepare the interior mold ID used in the manufacturing process of hose 1.Interior mold ID has columned part, should
Circular cylinder shaped portion has the diameter roughly the same with the inner peripheral surface of flexible hose 2.It can by the way that the circular cylinder shaped portion to be configured at
Thus the hose wall 22 from medial support pliability is played the role of in the inside of flexible hose 2 in injection molding.Fig. 3 only shows
The columned part in interior mold ID and omit other parts out.In addition, in the following description, the columned part
Referred to as " columned interior mold ".
Interior mold ID is configured to, and after the completion of hose 1, can take out from hose end.For example, shown in Fig. 9
Interior mold example in, for from the circular cylinder shaped portion of medial support hose wall in being substantially divided into clathrate 5
(ID1,ID2,ID3,ID4,ID5).Moreover, each interior mold is equipped with rodlike component, it is configured to these rod members with quilt
The mode tied up configures, so that the circular cylinder shaped portion of interior mold ID is completed.In Fig. 9, interior mold only illustrates circular cylinder shaped portion
And rod member, and omit the record of other parts.
Interior mold is configured to, if axially observing circular cylinder shaped portion, along longitudinal Central Line's (upper and lower of attached drawing
To；The direction X-X) and mold ID2 in mold ID3 in mold ID1 in first, third, second is successively adjacent to arrangement.Such as X-X
Shown in section, these interior mold ID1, ID3, ID2 are configured to mutually slide with tapered face, by by mold in third
Left direction extraction of the ID3 into X-X cross-sectional view makes in first in mold ID1 and second mold ID2 to position on the inside of radial direction
It moves, carries out undergauge so as to internal mold ID.
In addition, in by first mold ID1, mold ID3 in third, mold ID2 regards a mold chunking as in second
When (group mold), if axially observing circular cylinder shaped portion, interior mold ID is configured to, along the transverse direction (left and right directions of attached drawing；
The direction Y-Y) and mold ID5 in mold ID4 in the 4th, mold chunking (ID1, ID3, ID2), the 5th is successively adjacent to arrangement.
These interior mold ID4, ID5 and mold chunking (ID1, ID3, ID2) are configured to mutually slide with tapered face, pass through by
Upper direction extraction of the mold chunking (ID1, ID3, ID2) into Y-Y cross-sectional view, thus makes mold ID4 and the 5th internal model in the 4th
Have ID5 to displacement on the inside of radial direction, carries out undergauge so as to internal mold ID.
That is, in the example of interior mold shown in Fig. 9, by successively extracting mold in the third for constituting circular cylinder shaped portion out
ID3, mold ID1 in first, mold ID2 in second, mold ID4 in the 4th, mold ID5 in the 5th, can make interior mold undergauge.
If after the completion of hose 1, can be realized taking-up of the mold from hose end using such mold.It needs to illustrate
It is that, as long as can be realized taking-up of the mold from hose end, there is no particularly limit the specific structure of interior mold.Interior mold
Undergauge be not limited to the mechanism using the conical surface.Pin, wedge, screw etc. can be used in the undergauge of interior mold, and liquid also can be used
Pressure, air press and realize expanding, undergauge.In addition, interior mold is also configured to take out by decomposition from hose end.
As shown in figure 3, configuring columned internal model in the mode adjacent with the end IE in close hose center of inner cylinder 31
Has ID.The outer peripheral surface of the circular cylinder shaped portion of interior mold and the outer peripheral surface of inner cylinder 31 are in a manner of becoming the cylinder planar of nearly singular integral
Arranged coaxial.At this point, if interior mold as shown in Figure 9, then be configured to the circular cylinder shaped portion of interior mold and the end of inner cylinder 31
Portion IE is adjacent, and the rodlike part (illustration omitted in Fig. 3~Fig. 8) of interior mold passes through the inside of inner cylinder.Fig. 3 is with blank
Arrow shows the movement for abutting the circular cylinder shaped portion of interior mold with the end IE of inner cylinder 31.
The end IE in the close hose center of inner cylinder 31 is chamfered or rounded corner, therefore as in the present embodiment, excellent
Choosing make the circular cylinder shaped portion of interior mold become with the position of inner cylinder end abutment and these chamferings, the consistent shape of rounding angular shape
Shape.
Although the end IE of inner cylinder 31 and the circular cylinder shaped portion of interior mold are preferably configured adjacently in a manner of mutually abutting,
As long as in not to it is aftermentioned be insert-molded make a very bad impression in the range of, there may also be a little gaps between the two.
It is maintaining to configure columned interior mold ID in the mode adjacent with the end IE in close hose center of inner cylinder 31
State while, as shown in figure 4, interior mold ID and inner cylinder 31 to be inserted into the inside of hose end.At this point, so that interior mold
The mode that ID becomes hose center side carries out insertion operation.Fig. 4 with blank arrowhead shows interior mold ID and inner cylinder 31 be inserted into it is soft
The movement of tube end.In the state that insertion operation terminates, the end of flexible hose 2 is preferably elongation state, but can also be with
It is contraction state.
Fig. 3 and process shown in Fig. 4 are referred to as interior mold and are inserted into process.
Insertion operation can be the operation being pressed into straight, be also possible to the operation for being spirally pressed into and (being screwed into).At this
In embodiment, protrusion outstanding on the outside of oriented radial direction, ridge 311,311 are integrally formed in the outer peripheral surface of inner cylinder 31.?
When insertion operation, so that part and these ridges 311 between the helical form intensive aspect 21,21 for being present in hose of hose wall 22
Corresponding mode is screwed into inner cylinder 31 to hose 2.Although such protrusion, ridge 311 are not required, from by 31 He of inner cylinder
Hose main body 2 securely from the perspective of connection, is preferably provided with.
After interior mold is inserted into process, shaped referred to as so-called coating and injection moulding or what is be insert-molded is molded into
Shape, by 32 injection molded of outer cylinder in defined position.Refer to following technology here, being insert-molded: by hose end, defined
Component fastens mold in the state of being configured at the inside of cavity mold, carries out the injection molded of resin, and will be after injection molded
Component is integrally formed in hose end.In addition, being especially formed in most in the component for carrying out injection molded and being insert-molded
In the case where peripheral side, such injection molded is also commonly called as coating and injection moulding forming.
Firstly, being opened to cavity mold CD, CD for being configured to be formed outer cylinder.Then, by flexible hose 2,
Inner cylinder 31, the interior mold ID of the inner cylinder 31 of connecting elements and interior mold ID in the end of flexible hose 2 covering connecting elements
In the state of be integrally configured at the inside of cavity mold CD, CD, mold fastening is carried out after molding.Fig. 5 is with blank arrowhead
The mould assembling action of cavity mold CD is shown.After molding, if mold fastening terminates, as shown in fig. 6, by cavity mold CD and
The outer peripheral surface of flexible hose 2 forms cylindric cavity C.Outer cylinder 32 is formed by the cavity C.It should be noted that flexible
The spacing p of the helical form intensive aspect 21 of the hose of property refers to, is configured at when molding to cavity mold in cavity C and at it
The spacing of helical form intensive aspect 21 at the part of the flexible hose covered in process afterwards by outer cylinder 32.
In addition, at the part for forming cavity C, being configured in the inner circumferential side of flexible hose wall 22 in mold fastening
The circular cylinder shaped portion of inner cylinder 31 or interior mold ID, to prevent hose wall 22 to deformation on the inside of hose.In addition, in cavity C
Close to the end in hose center, due to clamping flexible hose between the circular cylinder shaped portion and cavity mold CD of interior mold ID
2, therefore prevent in injection molding resin from the partial compromise.Fig. 5 and process shown in fig. 6 are referred to as chamber and form work
Sequence.
After chamber formation process, to cavity C molded synthetic resin is formed by, make outer cylinder 32 to be tightly attached to outside hose
The mode of circumferential surface is integrally formed (Fig. 7).It should be noted that Fig. 3~Fig. 8 be omitted it is isostructural for the cast gate of casting resin
Diagram.In the case where resin is thermoplastic resin, thermoplastic elastomer (TPE), become be molded resin solidification by cooling
Outer cylinder 32, resin be reaction resin, heat-curing resin (especially rubber) in the case where, by carry out curing reaction,
Crosslinking makes be molded resin solidification and becomes outer cylinder 32.The process is referred to as injection step.
In injection step, by there are interior mold ID, hose wall 22, will be because of the high pressure that is molded by from medial support
Resin and make hose wall deform inwardly or there is a situation where breakage prevent trouble before it happens.In addition, by there are interior mold ID and
Flexible hose 2 is clamped between interior mold ID and cavity mold CD, thus also inhibits be molded resin to the side leakage of hose center
Out.
After forming outer cylinder 32 by injection step, the structure of hose 1 is completed in mould inside.In injection molding work
After sequence, as shown in figure 8, being opened to cavity mold CD, CD, and hose 1 is taken out from cavity mold CD.In addition, will
Interior mold ID is taken out by the inside of inner cylinder 31 from hose end.Fig. 8 shows the movement of these molds with blank arrowhead.?
This, the taking-up of interior mold can carry out in the following way, for example, using the interior mold for capableing of undergauge as shown in Figure 9,
In demoulding, internal mold ID carries out undergauge.It should be noted that the taking-up of interior mold ID is not limited thereto, can also pass through
Other methods are taken out.In addition, the mutual opportunity of the taking-up of the die sinking and interior mold ID of cavity mold CD, there is no particularly
It limits.Hose 1 is obtained by removal process shown in Fig. 8.
The effect and effect of the utility model are illustrated.It is used according to the electric dust collector of above-mentioned first embodiment
The resistance to ag(e)ing of the connection structure of hose, the part that hose main body is connect with connecting elements improves.
Technology as described in Patent Document 1 is such, in the connection structure of existing hose for electric vacuum cleaner, right
In the case that the interconnecting piece of hose and connecting elements applies input as the radial direction stretching hose along connecting elements, discovery
The reduction of the resistance to ag(e)ing of interconnecting piece.Inventor is to find out its cause, have found the reduction of the resistance to ag(e)ing mostly by the resin of hard
It is easy to produce at the terminal part for the inner cylinder that material is constituted.That is, when soft hose is sharply bent, because the bending sharply causes
It is easy at the terminal part of inner cylinder that there is a situation where helical form intensive aspect is damaged or hose wall rupture.
According to the connection structure of the hose for electric vacuum cleaner of above-mentioned first embodiment, at interconnecting piece, outer cylinder 32 with
The mode for being tightly attached to hose outer peripheral surface is integrally formed by the injection molded of synthetic resin, also, constitutes the synthesis of outer cylinder 32
Resin is softer than the constituent material of inner cylinder 31.In addition, the end OE in the close hose center of outer cylinder 32 is configured to leaning on than inner cylinder 31
The end IE in nearly hose center is close to hose center.Such structure is used by the connection structure of hose for electric vacuum cleaner,
Thus the end of outer cylinder 32 generates flexible.Moreover, supporting flexible hose 2 using the end of outer cylinder 32.It is flexible by this
Property, in the case where being inputted as the interconnecting piece to hose and connecting elements applies and stretches hose in the radial direction,
The local deformation of hose is mitigated, and resistance to ag(e)ing improves.
That is, being formed as the side for being tightly attached to hose outer peripheral surface to the end of hose center side outer cylinder 32 outstanding than inner cylinder 31
Formula is integrally formed.According to the structure, the end of outer cylinder 32 is integrally formed in a manner of being packed in hose wall from outside with hose wall
And it is supported, therefore the rigid of part that hose wall connects with inner cylinder end is improved.Also, outer cylinder 32 is by softer than inner cylinder 31
Resin material is formed, therefore the part of outer cylinder formed in a manner of more outstanding than inner cylinder allows to deform.
Therefore, it is applied in the hose of the connection structure to the hose for electric vacuum cleaner with above-mentioned first embodiment
Add by hose in the case where stretching such input F on the radial direction of connecting elements 3, as shown in Fig. 2, outer cylinder 32 with than
It the part that inner cylinder 31 is formed to hose center side mode outstanding can be upwardly-deformed in the side stretched by hose.By generating institute
The deformation for the outer cylinder 32 stated, part that hose main body 2 connects with inner cylinder end IE, hose main body 2 connect with outer cylinder end OE
Sharply bending, the local deformation of hose at part are able to mitigate.Pass through the mitigation of local deformation, the hose of interconnecting piece
Resistance to ag(e)ing improve.
Moreover, at the end IE in the close hose center of inner cylinder 31, the peripheral side of the end of inner cylinder 31 be chamfered or by
Rounded corner, therefore the resistance to ag(e)ing of hose transition further increases.This is because at the end IE of inner cylinder, outside inner cylinder
The ora terminalis of side relative to flexible hose 2 helical form intensive aspect 21 or hose wall and with the corner of ora terminalis contact, so as to
Enough inhibit the phenomenon that the resistance to ag(e)ing of hose reduces.That is, more prominent than inner cylinder by outer cylinder, outer cylinder is softer than inner cylinder, and inner cylinder
The peripheral side of end is chamfered or rounded angle, and the resistance to ag(e)ing for being thus connected the hose at portion improves.
Make the part of outer cylinder 32 formed in a manner of more outstanding than inner cylinder 31 with pliability, from the interconnecting piece for improving hose
Resistance to ag(e)ing from the perspective of, the end by the end OE in the close hose center of outer cylinder 32 than the close hose center of inner cylinder 31
Portion IE is set as L close to the distance that hose center configures, when the internal diameter of hose is set as D, preferred 0.05≤L/D≤0.5.Such one
Come, promote outer cylinder 32 than the deformation of the part outstanding of inner cylinder 31, the local deformation of flexible hose 2 is suppressed more, connection
The resistance to ag(e)ing of hose at portion improves.
From the same viewpoint, the hardness for constituting the synthetic resin of outer cylinder 32 is preferably to be located in terms of A type durometer hardness
In 60~90 degree of range.When constituting outer cylinder 32 by the synthetic resin of the hardness, it is easy to promote the protruding portion of outer cylinder 32
Deformation, the local deformation of flexible hose 2 are suppressed more, and the resistance to ag(e)ing of the hose at interconnecting piece improves.
In addition, the distance L outstanding of outer cylinder 32 is preferably L >=0.8p when the spacing of helical form intensive aspect 21 is set as p.This
Sample one, at the part that outer cylinder 32 is more prominent than inner cylinder 31 to be formed, helical form intensive aspect 21 is configured within the scope of substantially complete cycle,
The protruding portion of outer cylinder 32 is more integrally deformed with flexible hose 2.Therefore, the local deformation of flexible hose 2 is further
Inhibit, the resistance to ag(e)ing of the hose at interconnecting piece improves.
From the viewpoint of promoting the deformation of protruding portion of outer cylinder, the portion that is formed in such a way that outer cylinder 32 is more outstanding than inner cylinder 31
Point preferably, with towards hose center side and the diameter dullness of the outer peripheral surface of outer cylinder 32 reduces, especially preferably outer cylinder 32
Outer peripheral surface be formed as with towards hose center side and conical surface-shaped that diameter becomes smaller.According to the structure, flexible hose 2
Local deformation is more effectively inhibited, and the resistance to ag(e)ing of the hose at interconnecting piece improves.
In addition, according to the manufacturing method of above-mentioned hose, by using the interior mold that can be taken out from hose end,
It can manufacture to efficient and high-quality the hose group of the hose for electric vacuum cleaner connection structure with above-mentioned first embodiment
Part.Moreover, the resistance to ag(e)ing of the hose at the interconnecting piece of hose main body and connecting elements mentions according to obtained hose
It is high.
[embodiment]
Above-mentioned function and effect are confirmed by testing.
(embodiment 1)
Produce hose connecting structure corresponding with first embodiment.Here, the reinforcement of manufactured flexible hose 2
The coil diameter (internal diameter) of body 21 is 40mm.In addition, the spacing p of the helical form intensive aspect 21 of flexible hose 2 is 16mm.In pliability
In the state that hose 2 and connecting elements 3 are formed as one, compared with the end IE of inner cylinder 31, the end OE of outer cylinder 32 is into hose
Entreat side prominent 8mm (being equivalent to L=8mm, L/D=0.2, L/p=0.5).In addition, implementing in the peripheral side of the end of inner cylinder suitable
In the rounded corner of R1.0mm.Inner cylinder 31 is made of hard vinyl chloride resin, and outer cylinder 32 is the soft chlorine of 70 degree (Du sieve A) by hardness
Vinyl is constituted.
(embodiment 2)
Relative to embodiment 1, using by the end OE of outer cylinder 32 relative to the end IE of inner cylinder 31 and to hose center side
Amount L outstanding is set as the example of 5mm (being equivalent to L/D=0.13, L/p=0.31).
(comparative example)
Relative to embodiment, identical position (phase is in hose axial direction using the end of inner cylinder and the end of outer cylinder
When in L/D=0, L/p=0) example.In addition, in a comparative example, not implementing chamfering, rounding in the peripheral side of the end of inner cylinder
Angle.
For these embodiments, comparative example, bending load anti-aging test has been carried out.Test proceeds as follows: with
Connecting elements 3 is set as upside and connecting elements is installed on test fixture by the mode for making flexible hose 2 become downside, can
In the state that the lower part of flexible hose 2 hangs down weight and acts on the load of 2kgf (19.6N), to be given repeatedly just to test fixture
The mode of minus 90 degree of angle displacement makes test fixture periodic motion, gives bending to the interconnecting piece of hose and connecting elements and becomes
Shape.
In embodiment 1, embodiment 2, even if number of bends is more than 150,000 times also not in flexible hose, connecting elements hair
It now damages, deform.On the other hand, in a comparative example, number of bends hose wall 22 at 2.5 ten thousand times or so is ruptured.Than
Softer outer cylinder 32 by than inner cylinder 31 to hose center side it is outstanding in a manner of be tightly attached to hose periphery and integrally formed, and to inner cylinder
Chamfering, rounded corner are implemented in the peripheral side of end, at this point, the ageing-resistant intensity for confirming the hose at interconnecting piece sufficiently improves.
Utility model is not limited to above embodiment, can be subject to various changes and be implemented.Below to practical
Novel other embodiments are illustrated, but in the following description, mainly illustrate part different from the embodiment described above,
Detail explanation is omitted for same part.In addition, these embodiments can be combined with each other part of it or displacement
Part of it and implemented.
As long as realizing the connection with hose using flexible hose and by connecting elements, then electric dust collector
There is no particularly limit type.The connection structure of hose for electric vacuum cleaner as above embodiment is in addition to common
In home-use pot electric dust collector except use, for example, also vertical electric dust collector, various businesses electric dust collector,
It is used in the central electric dust absorption system with cast.
As long as specific form, the mode of flexible hose 2 have helical form intensive aspect, there is no particularly limited
It is fixed.As embodiment described above, flexible hose 2 can be in the prominent to periphery of substantially cylindric flexible hose wall
Position out is formed with helical form intensive aspect, is also possible to hose wall and is formed as corrugated tube shape and can extend to zero load
When length 3~8 times or so of hose.Even if in the case where hose is imbued with retractility, the spacing p of helical form intensive aspect
It can be treated as the spacing for the intensive aspect that outer cylinder 32 is close at the part formed and implement utility model.In addition, helical form
Intensive aspect can be set to a plurality of.In this case, the interval of intensive aspect adjacent in the longitudinal direction is handled as spacing p i.e.
It can.
In addition, in the above-described embodiment, at the part for being formed with helical form intensive aspect 21 pliability it is soft
Hose of the periphery of pipe 2 towards mode outstanding on the outside of radial direction illustrates embodiment, but the periphery of flexible hose
Face shape is not limited thereto, and for example, it can be substantially smooth cylinder planars.It should be noted that such as above-mentioned embodiment party
Formula is such, and in the case where the outer peripheral surface of flexible hose has spiral helicine ridge, outer cylinder 32 is tightly attached to such ridge
And it is formed, therefore the integraty of flexible hose 2 and the protruding portion of outer cylinder 32 becomes more reliable, the resistance to ag(e)ing of hose transition
It improves, therefore is preferred.
In addition, from the viewpoint of further increase the integraty of protruding portion of flexible hose 2 and outer cylinder 32 it is such, it is excellent
Bonding, thermally welded etc. were gated by the inner circumferential face bonding of the outer peripheral surface of flexible hose 2 and outer cylinder 32, as a result, hose transition
Resistance to ag(e)ing further increase.
In addition, the manufacturing method of above-mentioned hose 1 is not limited to Fig. 3 as described above~manufacture shown in Fig. 8
Method can also be manufactured by other manufacturing methods.For example, firstly, by well known method, by injection molded flexible
Property hose 2 the integrally formed outer cylinder 32 in outside the inner cylinder 31 being additionally formed then is inserted into the inside of flexible hose 2, will
Inner cylinder 31 is bonded in flexible hose 2 and outer cylinder 32 and is formed as one, and according to such manufacturing method, can also manufacture
The hose 1 stated.
Industrial applicibility
Hose for electric vacuum cleaner connection structure involved in the utility model can be improved the resistance to ag(e)ing of interconnecting piece,
The utility value of industrial aspect is high.
Claims (5)
1. a kind of connection structure of hose for electric vacuum cleaner is to connect the end of hose for electric vacuum cleaner with connecting elements
Structure, which is characterized in that
Hose for electric vacuum cleaner is the hose that spiral helicine intensive aspect is formed as one with flexible hose wall,
The connecting elements has inner cylinder, and inner cylinder is inserted into hose in a manner of the periphery of the end of hose covering inner cylinder
Side, also,
In the connecting elements, outer cylinder, inner barrel and outer barrel are set in a manner of the hose peripheral side for covering the part inserted with inner cylinder
It mutually forms and is integrated,
The outer cylinder is integrally formed by the injection molded of synthetic resin in a manner of being close to hose outer peripheral surface,
The synthetic resin for constituting the outer cylinder is softer than the constituent material of the inner cylinder,
The end in the close hose center of the outer cylinder is configured to, than the inner cylinder close hose center end close to hose
Center,
In the end in the close hose center of the inner cylinder, the peripheral side of end is chamfered.
2. the connection structure of hose for electric vacuum cleaner according to claim 1, which is characterized in that
In the end in the close hose center of the inner cylinder, the rounded angle in the peripheral side of end.
3. the connection structure of hose for electric vacuum cleaner according to claim 1 or 2, which is characterized in that
End by the end in the close hose center of the outer cylinder than the close hose center of the inner cylinder is close to hose center
The distance of configuration is set as L and the internal diameter of the hose is set as D, at this point, 0.05≤L/D≤0.5.
4. the connection structure of hose for electric vacuum cleaner according to claim 1 or 2, which is characterized in that
Outer cylinder is made of the synthetic resin that A type durometer hardness is 60~90 degree.
5. the connection structure of hose for electric vacuum cleaner according to claim 3, which is characterized in that
Outer cylinder is made of the synthetic resin that A type durometer hardness is 60~90 degree.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017047710 | 2017-03-13 | ||
| JP2017-047710 | 2017-03-13 | ||
| JP2017-087121 | 2017-04-26 | ||
| JP2017087121A JP2018149256A (en) | 2017-03-13 | 2017-04-26 | Connection structure of vacuum cleaner hose and manufacturing method of hose assembly having the connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208355339U true CN208355339U (en) | 2019-01-11 |
Family
ID=63681149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721191344.0U Active CN208355339U (en) | 2017-03-13 | 2017-09-15 | The connection structure of hose for electric vacuum cleaner |
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| Country | Link |
|---|---|
| JP (1) | JP2018149256A (en) |
| CN (1) | CN208355339U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7154170B2 (en) * | 2019-03-27 | 2022-10-17 | シャープ株式会社 | Vacuum cleaner extension tube and vacuum cleaner with the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6171028A (en) * | 1985-08-20 | 1986-04-11 | 松下電器産業株式会社 | Production of hose for electric cleaner |
| JP4049729B2 (en) * | 2003-10-29 | 2008-02-20 | 三洋電機株式会社 | Hose for vacuum cleaner |
| JP4049746B2 (en) * | 2004-01-22 | 2008-02-20 | 三洋電機株式会社 | Hose for vacuum cleaner |
-
2017
- 2017-04-26 JP JP2017087121A patent/JP2018149256A/en active Pending
- 2017-09-15 CN CN201721191344.0U patent/CN208355339U/en active Active
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