WO2021220619A1 - Extension hose for electric vacuum cleaner, and electric vacuum cleaner provided with said extension hose - Google Patents

Extension hose for electric vacuum cleaner, and electric vacuum cleaner provided with said extension hose Download PDF

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Publication number
WO2021220619A1
WO2021220619A1 PCT/JP2021/008928 JP2021008928W WO2021220619A1 WO 2021220619 A1 WO2021220619 A1 WO 2021220619A1 JP 2021008928 W JP2021008928 W JP 2021008928W WO 2021220619 A1 WO2021220619 A1 WO 2021220619A1
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WIPO (PCT)
Prior art keywords
vacuum cleaner
extension pipe
tubular portion
extension
thickness
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PCT/JP2021/008928
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French (fr)
Japanese (ja)
Inventor
遼 山谷
則和 伊藤
雅瑛 横田
寿之 田村
慶太 板垣
孔陽 川本
優志 土門
Original Assignee
日立グローバルライフソリューションズ株式会社
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Application filed by 日立グローバルライフソリューションズ株式会社 filed Critical 日立グローバルライフソリューションズ株式会社
Priority to CN202180021340.0A priority Critical patent/CN115297754A/en
Publication of WO2021220619A1 publication Critical patent/WO2021220619A1/en

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/24—Hoses or pipes; Hose or pipe couplings

Definitions

  • the present invention relates to an extension pipe of an electric vacuum cleaner and an electric vacuum cleaner.
  • Patent Document 1 proposes a technique of applying carbon to the material of an extension tube to make it lightweight and strong.
  • the extension pipe described in Patent Document 1 has a uniform wall thickness, and there is a problem that the strength is lowered when the wall thickness is reduced in order to further reduce the weight.
  • the present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an extension pipe of an electric vacuum cleaner capable of reducing the weight without reducing the strength, and an electric vacuum cleaner provided with the extension pipe thereof.
  • the present invention has a cylindrical portion formed in a cylindrical shape, and the tubular portion has a base end side connecting portion that is directly or indirectly connected to the vacuum cleaner main body at one end of the tubular portion.
  • the other end of the tubular portion is provided with a tip-side connecting portion to which a suction port is connected, and the tubular portion is characterized by having an irregular pattern having a non-uniform thickness.
  • an extension tube of an electric vacuum cleaner and an electric vacuum cleaner capable of reducing the weight without reducing the strength.
  • FIG. 1 is a perspective view showing a vacuum cleaner provided with an extension pipe of the first embodiment.
  • the electric vacuum cleaner 1 is a canister type (cylinder type) vacuum cleaner, and is a vacuum cleaner main body 2, a hose portion 3, an operation pipe 4, an extension pipe 5, and a suction port 6 (suction). Including the tool).
  • the vacuum cleaner main body 2 includes an electric blower 20 that generates suction force, a dust collector 7 that stores dust collected by the suction force of the electric blower 20 and the like.
  • the dust collecting unit 7 is a paper pack type, a cyclone type, or the like.
  • One end of the hose portion 3 is connected to the connection port 11a of the vacuum cleaner main body 2 so as to communicate with the dust collecting portion 7 of the vacuum cleaner main body 2.
  • the other end of the hose portion 3 is connected to one end of the operation pipe 4.
  • the operation tube 4 is provided with a grip 4a or the like equipped with a hand operation switch SW or the like. By operating the hand operation switch SW of the operation tube 4, it is possible to switch the operation strength of the electric blower 20 and the like.
  • the extension tube 5 has a tubular portion 51 formed in a tubular shape (substantially cylindrical shape). At one end of the tubular portion 51 in the longitudinal direction (axial direction), a base end side connecting portion 52 connected to the operation pipe 4 (indirectly connected to the vacuum cleaner main body 2) and a suction port 6 are connected. It has a connection portion 53 on the tip side.
  • the suction port 6 is rotatably connected to, for example, a case 6a accommodating a rotary brush (not shown) that comes into contact with a surface to be cleaned (floor surface or the like), and the case 6a, and is connected to the tip end side of the extension pipe 5. It is composed of a joint portion 6b or the like that is detachably connected to the 53.
  • FIG. 2 is a perspective view showing an extension pipe of the first embodiment. Although the extension tube 5 that does not expand and contract is shown in FIG. 2, it may be applied to a stretchable tube.
  • the base end side connecting portion 52 has a cylindrical insertion portion 52a to be inserted into the operation tube 4. Further, the base end side connecting portion 52 has a pair of terminal portions 52b that are electrically connected to the operation tube 4. The terminal portion 52b is located outside the insertion portion 52a in the radial direction.
  • the tip side connecting portion 53 is formed with an opening 53a connected to the suction port 6 (see FIG. 1). Further, the tip side connecting portion 53 has a pressing type unlock button 53b for releasing the connection with the suction port 6 (see FIG. 1).
  • the material of the extension tube 5 reinforced plastic containing glass fiber, carbon resin containing carbon fiber, and the like can be mentioned. By using such a material, the strength of the product can be ensured even if the extension pipe 5 is formed to have a thin wall thickness to reduce the weight.
  • the present invention is not limited to those formed of a material containing reinforcing fibers such as glass fiber and carbon fiber, and may be formed of a synthetic resin containing no reinforcing fibers.
  • the tubular portion 51 between the base end side connecting portion 52 and the tip end side connecting portion 53 has a non-uniform thickness (thickness) and has an uneven surface (concavo-convex shape) formed by an irregular pattern. ) 51a (see FIG. 3) and a concave-convex surface (concave-convex shape) 51b (see FIG. 3) are formed. Since the extension pipe 5 is a member through which air passes, a hole-shaped extension pipe 5 is not formed on the outer peripheral surface of the extension pipe 5.
  • the optimum material density distribution of the uneven surfaces 51a and 51b is derived by topology optimization. In other words, by topology optimization, unnecessary parts of the structure of the extension pipe 5 are deleted (thinned). As a result, it is possible to generate a three-dimensional structure that can be reduced in weight without impairing the strength.
  • FIG. 3 is a schematic cross-sectional view showing an unsteady pattern of the extension pipe of the first embodiment.
  • uneven surfaces (concavo-convex portions) 51a and 51b are formed on the outer wall surface 51s and the inner wall surface 51t of the pipe.
  • the uneven surfaces 51a and 51b are not regular patterns but irregular patterns. That is, the concave-convex surface 51a has concave portions 55a, 55b, 55c and convex portions 56a, 56b, and the areas of the concave portions are different.
  • the concave-convex surface 51b (concave-convex portion) has concave portions 57a, 57b, 57c at positions corresponding to the concave portions 55a, 55b, 55c, and convex portions 58a, 58b at positions corresponding to the convex portions 56a, 56b.
  • the extension pipe 5 may have a configuration in which the recesses 55a to 55c and the recesses 57a to 57c do not face each other. Further, the convex portions 56a and 56b and the convex portions 58a and 58b may not face each other.
  • the recesses 55a to 55c and 57a to 57c are formed by forming the thickness (thickness) of the pipe wall of the extension pipe 5 to be thin.
  • the convex portions 56a, 56b, 58a, 58b are formed by forming the wall thickness (thickness) of the extension pipe 5 to be thicker than the wall thickness (thickness) of the concave portions 55a to 55c.
  • the extension pipe 5 is configured such that the patterns of the uneven surfaces 51a and 51b in the axial direction (longitudinal direction) become unsteady.
  • the uneven surfaces 51a and 51b are configured to have an unsteady pattern P not only in the axial direction but also in the circumferential direction of the extension pipe 5.
  • FIG. 4 is a schematic cross-sectional view when the wall thickness of the extension pipe of the first embodiment is subtracted.
  • the non-stationary pattern P (see FIG. 3) of the extension tube 5 is to reduce the wall thickness (pull: ⁇ d), for example, to form a recess 55a on the surface of the extension tube 5.
  • the method of reducing the wall thickness may be configured by forming a recess in the inner wall surface (back surface) 51t of the extension pipe 5, or as shown in FIG. 3, the extension pipe 5 It may be configured by forming recesses on both the outer wall surface 51s and the inner wall surface 51t.
  • FIG. 5 is a schematic cross-sectional view when the wall thickness of the extension pipe of the present embodiment is added.
  • the non-stationary pattern P (see FIG. 3) of the extension tube 5 is formed by increasing the wall thickness (addition: + d), for example, by forming a convex portion 56a on the surface of the extension tube 5. It is composed.
  • the method of increasing the wall thickness may be configured by forming a convex portion on the inner wall surface (back surface) of the extension pipe 5, or as shown in FIG. 3, the extension pipe. 5 may be configured by forming convex portions on both the outer wall surface 51s and the inner wall surface 51t.
  • 6A and 6B are schematic views showing evaluation conditions for lateral compression of the extension tube.
  • 7A and 7B are schematic views showing evaluation conditions for longitudinal compression of the extension tube.
  • 8A and 8B are schematic views showing the evaluation conditions for the deflection deformation of the extension pipe.
  • 9A to 9C are schematic views showing evaluation conditions for torsional deformation of the extension pipe.
  • the evaluation method shown below is an example and is not limited to the present embodiment, and some of them may be selected and evaluated.
  • FIGS. 6A and 6B when evaluating lateral compression, a load is applied to four points (A to D) of the extension pipe 5 for evaluation.
  • the vertical front direction of the paper surface is the upper surface of the extension tube 5.
  • the vertical front direction of the paper surface is the left side surface of the extension tube 5.
  • the evaluation of FIG. 6A assumes a case where a load is applied so as to simply crush the extension pipe 5 from the lateral direction.
  • the evaluation of FIG. 6B assumes the case where the extension pipe 5 is stepped on with a foot from above.
  • the proximal end side connecting portion 52 of the extension pipe 5 is on the upper side and the distal end side connecting portion 53 is on the lower side, and as shown by the white arrows, the proximal end side connecting portion 52 is connected to the distal end side. It is assumed that the button is pushed toward the unit 53.
  • FIGS. 7A and 7B when evaluating the longitudinal (axial) compression, a load is applied in the axial direction from the axial end surface 52c of the proximal end side connecting portion 52 (see FIG. 7B). , As shown by the broken line, the end face 53c in the axial direction of the tip side connecting portion 53 is restrained (see FIG. 7A) for evaluation.
  • FIG. 8A and 8B assume that the center of the extension pipe 5 in the longitudinal direction (axial direction) is pushed by hand. As shown by dots in FIG. 8A, the inner wall surface 53a1 of the tip end side connecting portion 53 of the extension pipe 5 is restrained, and as shown by dots in FIG. 8B, the outer wall surface of the proximal end side connecting portion 52 of the extension pipe 5 is restrained. The evaluation is made by applying a load to the center (white arrow) of the extension pipe 5 in the longitudinal direction (axial direction) while the 52a1 is restrained.
  • FIG. 9A to 9C assume a case where the mouthpiece 6 (see FIG. 1) is connected and twisted to the left and right.
  • the inner wall surface 53a1 of the tip end side connecting portion 53 of the extension pipe 5 is restrained, and as shown by dots in FIG. 9B, the outer wall surface of the proximal end side connecting portion 52 of the extension pipe 5 is restrained.
  • the outer wall surface 52a1 is evaluated by applying a load that twists in the counterclockwise direction.
  • the extension tube 5 having a non-uniform thickness and an unsteady pattern P is configured by the topology optimization. Then, by performing the evaluation tests shown in FIGS. 6A and 6B, 7A and 7B, 8A and 8B, and 9A to 9C, the extension tube 5 in which the uneven shape obtained by the topology optimization was obtained. Check whether or not is valid as a product.
  • the extension pipe 5 of the first embodiment has a cylindrical portion 51 formed in a cylindrical shape, and the tubular portion 51 is indirectly connected to the vacuum cleaner main body 2 at one end of the cylindrical portion 51.
  • the base end side connecting portion 52 to be specifically connected and the tip end side connecting portion 53 to which the suction port 6 is connected to the other end of the cylindrical portion 51 are provided, and the tubular portion 51 has a non-uniform thickness. It has an unsteady pattern P. According to this, the weight can be reduced without reducing the strength of the extension pipe 5.
  • the non-stationary pattern P is configured by subtracting the thickness of the cylindrical portion 51. According to this, it is possible to contribute to the weight reduction of the extension pipe 5.
  • the non-stationary pattern P is configured by adding the thickness of the cylindrical portion 51. According to this, the required strength of the extension pipe 5 can be secured.
  • the vacuum cleaner 1 of the first embodiment includes a vacuum cleaner main body 2 incorporating an electric blower 20 and an extension pipe 5 connected to the vacuum cleaner main body 2. According to this, the handleability of the vacuum cleaner 1 can be improved by further reducing the weight.
  • FIG. 10 is a cross-sectional view showing an extension pipe of the second embodiment.
  • an uneven surface 51a is formed on the outer wall surface (outer surface) 51s of the tubular portion 51.
  • the uneven surface 51a is composed of recesses 55a to 55c having a non-uniform thickness and formed of an unsteady pattern P, and convex portions 56a and 56b.
  • the inner wall surface (back surface) 51u of the extension pipe 5A is formed with a smooth surface (a surface without steps, a surface without unevenness) instead of the uneven surface shown in FIG.
  • the inner wall surface 51u is formed in a substantially straight line along the axial direction and a substantially circular shape along the radial direction.
  • the extension pipe 5A of the second embodiment has an uneven surface 51a on the outer wall surface 51s (outside) of the tubular portion 51 and a smooth surface on the inner wall surface 51u of the tubular portion 51. This makes it possible to prevent dust from being caught and prevent it from becoming a suction resistance.
  • FIG. 11 is a schematic view showing the density of the convex portion of the extension pipe of the third embodiment.
  • the density (denseness) of the convex portion 56a formed on the proximal end side connecting portion 52 side of one end in the axial direction (longitudinal direction) becomes sparse. It is configured as follows. Further, the extension pipe 5B is configured so that the density (denseness) of the convex portions 56a formed on the tip side connecting portion 53 side of the other end in the axial direction (longitudinal direction) becomes sparse.
  • the fact that the density of the convex portion 56a is sparse means that the area formed in the convex shape is small. As a result, it is possible to contribute to the weight reduction of the extension pipe 5B by reducing the wall thickness of the end portion where the strength can be relatively secured in the extension pipe 5B.
  • the extension pipe 5B is configured so that the density (denseness) of the convex portions 56a becomes dense in the center in the axial direction (longitudinal direction).
  • the density of the convex portions 56a means that the convexly formed area is formed more than both ends in the axial direction of the extension pipe 5B.
  • FIG. 12 is a cross-sectional view showing the uneven shape of the extension pipe of the fourth embodiment.
  • the sheet material 60 is integrally formed by insert molding.
  • the resin does not flow in the molding mold unless the wall thickness is to some extent. Therefore, as a method of forming the wall thickness as thin as possible, the extension pipe 5C is constructed by insert molding the sheet material 60 of another part.
  • the recess 55a of the cylindrical portion 51 is composed of the sheet material 60 as a separate part. According to this, the wall thickness of the recess can be made thin, and the weight can be further reduced. Further, if further weight reduction is required, the sheet material 60 is not limited to a material having a certain degree of rigidity, and may be a film-shaped material.
  • a case where a pattern P having a non-uniform thickness and an unsteady thickness is formed on the extension tube 5 by using topology optimization is an example.
  • it is not limited to the extension pipe 5, and the main body of the canister (cylinder type) vacuum cleaner, the main body of the stick vacuum cleaner, the main body of the handy vacuum cleaner, the main body of the robot vacuum cleaner, the mouthpiece, etc. are attached.
  • Topology optimization may also be applied to a product or the like to have an unsteady pattern P with a non-uniform thickness. Even in such a case, the weight can be reduced without reducing the strength.
  • Vacuum cleaner body Vacuum cleaner body 20 Electric blower 5,5A, 5B, 5C Extension pipe 51 Cylindrical part 51a, 51b Concavo-convex surface (concave and convex shape) 52 Base end side connection part 52a Insertion part 53 Tip side connection part 55a, 55b, 55c, 57a, 57b, 57c Concave part 56a, 56b, 58a, 58b Convex part P Unsteady pattern

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  • Electric Vacuum Cleaner (AREA)

Abstract

A cylindrical part (51) is provided with a base-end-side connection part that is directly or indirectly connected to a vacuum cleaner body at one end, and a distal-end-side connection part to which a suction opening is connected at the other end. The cylindrical part (51) has an irregular pattern (P) in which the thickness is non-uniform. The irregular pattern (P) is configured by subtracting from the thickness of the cylindrical part (51). Additionally, the irregular pattern (P) is configured by adding to the thickness of the cylindrical part (51).

Description

電気掃除機の延長管およびその延長管を備えた電気掃除機Vacuum cleaner extension tube and vacuum cleaner with the extension tube
　本発明は、電機掃除機の延長管および電気掃除機に関する。 The present invention relates to an extension pipe of an electric vacuum cleaner and an electric vacuum cleaner.
　電気掃除機では、軽量化を図る技術が種々提案されている。例えば、特許文献１には、延長管の材料にカーボンを適用することで、軽量で強固なものにする技術が提案されている。 For vacuum cleaners, various technologies for weight reduction have been proposed. For example, Patent Document 1 proposes a technique of applying carbon to the material of an extension tube to make it lightweight and strong.
国際公開第２０１８／０８７９３６号International Publication No. 2018/087936
　しかしながら、特許文献１に記載の延長管は、均一な肉厚であり、さらなる軽量化を図るために肉厚を薄くすると、強度が低下するという課題がある。 However, the extension pipe described in Patent Document 1 has a uniform wall thickness, and there is a problem that the strength is lowered when the wall thickness is reduced in order to further reduce the weight.
　本発明は、前記した従来の課題を解決するものであり、強度を落とさず軽量化が可能な電気掃除機の延長管およびその延長管を備えた電気掃除機を提供することを目的とする。 The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an extension pipe of an electric vacuum cleaner capable of reducing the weight without reducing the strength, and an electric vacuum cleaner provided with the extension pipe thereof.
　本発明は、筒状に形成される筒状部を有し、前記筒状部は、当該筒状部の一端に掃除機本体と直接的または間接的に接続される基端側接続部と、当該筒状部の他端に吸口が接続される先端側接続部と、を備え、前記筒状部は、厚さが不均一な不定常パターンを有することを特徴とする。 The present invention has a cylindrical portion formed in a cylindrical shape, and the tubular portion has a base end side connecting portion that is directly or indirectly connected to the vacuum cleaner main body at one end of the tubular portion. The other end of the tubular portion is provided with a tip-side connecting portion to which a suction port is connected, and the tubular portion is characterized by having an irregular pattern having a non-uniform thickness.
　本発明によれば、強度を落とさず軽量化が可能な電気掃除機の延長管および電気掃除機を提供できる。 According to the present invention, it is possible to provide an extension tube of an electric vacuum cleaner and an electric vacuum cleaner capable of reducing the weight without reducing the strength.
第１実施形態の延長管を備えた電気掃除機を示す斜視図である。It is a perspective view which shows the vacuum cleaner provided with the extension pipe of 1st Embodiment. 第１実施形態の延長管を示す斜視図である。It is a perspective view which shows the extension pipe of 1st Embodiment. 第１実施形態の延長管の厚みが不均一な不定常パターンを示す概略断面図である。It is a schematic cross-sectional view which shows the unsteady pattern which the thickness of the extension tube of 1st Embodiment is uneven. 第１実施形態の延長管の肉厚を引いた場合の概略断面図である。It is the schematic cross-sectional view when the wall thickness of the extension pipe of 1st Embodiment is subtracted. 第１実施形態の延長管の肉厚を足した場合の概略断面図である。It is the schematic cross-sectional view when the wall thickness of the extension pipe of 1st Embodiment is added. 延長管の横方向圧縮の評価条件を示す模式図である。It is a schematic diagram which shows the evaluation condition of the lateral compression of an extension tube. 延長管の横方向圧縮の評価条件を示す模式図である。It is a schematic diagram which shows the evaluation condition of the lateral compression of an extension tube. 延長管の縦方向圧縮の評価条件を示す模式図である。It is a schematic diagram which shows the evaluation condition of the vertical compression of an extension tube. 延長管の縦方向圧縮の評価条件を示す模式図である。It is a schematic diagram which shows the evaluation condition of the vertical compression of an extension tube. 延長管のたわみ変形の評価条件を示す模式図である。It is a schematic diagram which shows the evaluation condition of the deflection deformation of an extension pipe. 延長管のたわみ変形の評価条件を示す模式図である。It is a schematic diagram which shows the evaluation condition of the deflection deformation of an extension pipe. 延長管のねじり変形の評価条件を示す模式図である。It is a schematic diagram which shows the evaluation condition of the torsional deformation of an extension pipe. 延長管のねじり変形の評価条件を示す模式図である。It is a schematic diagram which shows the evaluation condition of the torsional deformation of an extension pipe. 延長管のねじり変形の評価条件を示す模式図である。It is a schematic diagram which shows the evaluation condition of the torsional deformation of an extension pipe. 第２実施形態の延長管を示す断面図である。It is sectional drawing which shows the extension pipe of 2nd Embodiment. 第３実施形態の延長管を示す概略図である。It is the schematic which shows the extension pipe of 3rd Embodiment. 第４実施形態の延長管を示す断面図である。It is sectional drawing which shows the extension pipe of 4th Embodiment.
　以下、本発明を実施するための形態（以下「実施形態」という）について、適宜図面を参照しながら詳細に説明する。なお、図１および図２では、厚さが不均一な不定常パターンＰの図示を省略している。
　図１は、第１実施形態の延長管を備えた電気掃除機を示す斜視図である。
　図１に示すように、電気掃除機１は、キャニスター式（シリンダー式）の掃除機であり、掃除機本体２と、ホース部３と、操作管４と、延長管５と、吸口６（吸込具）とを含んで構成されている。 Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate. Note that in FIGS. 1 and 2, the non-stationary pattern P having a non-uniform thickness is not shown.
FIG. 1 is a perspective view showing a vacuum cleaner provided with an extension pipe of the first embodiment.
As shown in FIG. 1, the electric vacuum cleaner 1 is a canister type (cylinder type) vacuum cleaner, and is a vacuum cleaner main body 2, a hose portion 3, an operation pipe 4, an extension pipe 5, and a suction port 6 (suction). Including the tool).
　掃除機本体２は、吸引力を発生させる電動送風機２０、この電動送風機２０の吸引力で集塵した塵埃を収容する集塵部７などを備えている。集塵部７は、紙パック式やサイクロン式などである。 The vacuum cleaner main body 2 includes an electric blower 20 that generates suction force, a dust collector 7 that stores dust collected by the suction force of the electric blower 20 and the like. The dust collecting unit 7 is a paper pack type, a cyclone type, or the like.
　ホース部３の一端は、掃除機本体２の集塵部７と連通するように掃除機本体２の接続口１１ａに接続されている。また、ホース部３の他端は、操作管４の一端に接続されている。 One end of the hose portion 3 is connected to the connection port 11a of the vacuum cleaner main body 2 so as to communicate with the dust collecting portion 7 of the vacuum cleaner main body 2. The other end of the hose portion 3 is connected to one end of the operation pipe 4.
　操作管４は、手元操作スイッチＳＷなどを備えたグリップ４ａなどを備えている。操作管４の手元操作スイッチＳＷを操作することなどによって、電動送風機２０の運転の強弱切り替えなどが可能となっている。 The operation tube 4 is provided with a grip 4a or the like equipped with a hand operation switch SW or the like. By operating the hand operation switch SW of the operation tube 4, it is possible to switch the operation strength of the electric blower 20 and the like.
　延長管５は、筒状（略円筒状）に形成された筒状部５１を有する。この筒状部５１の長手方向（軸方向）の一端には、操作管４と接続される（掃除機本体２と間接的に接続される）基端側接続部５２と、吸口６と接続される先端側接続部５３と、有している。 The extension tube 5 has a tubular portion 51 formed in a tubular shape (substantially cylindrical shape). At one end of the tubular portion 51 in the longitudinal direction (axial direction), a base end side connecting portion 52 connected to the operation pipe 4 (indirectly connected to the vacuum cleaner main body 2) and a suction port 6 are connected. It has a connection portion 53 on the tip side.
　吸口６は、例えば、被掃除面（床面など）と接触する回転式のブラシ（不図示）を収容するケース６ａ、このケース６ａと回動自在に連結され、延長管５の先端側接続部５３と着脱可能に接続される継手部６ｂなどで構成されている。 The suction port 6 is rotatably connected to, for example, a case 6a accommodating a rotary brush (not shown) that comes into contact with a surface to be cleaned (floor surface or the like), and the case 6a, and is connected to the tip end side of the extension pipe 5. It is composed of a joint portion 6b or the like that is detachably connected to the 53.
　図２は、第１本実施形態の延長管を示す斜視図である。なお、図２では、伸縮しない延長管５を示して説明するが、伸縮可能なものに適用してもよい。 FIG. 2 is a perspective view showing an extension pipe of the first embodiment. Although the extension tube 5 that does not expand and contract is shown in FIG. 2, it may be applied to a stretchable tube.
　基端側接続部５２は、操作管４に内挿される円筒状の挿入部５２ａを有している。また、基端側接続部５２は、操作管４と電気的に接続される一対の端子部５２ｂを有している。この端子部５２ｂは、挿入部５２ａの径方向の外側に位置している。 The base end side connecting portion 52 has a cylindrical insertion portion 52a to be inserted into the operation tube 4. Further, the base end side connecting portion 52 has a pair of terminal portions 52b that are electrically connected to the operation tube 4. The terminal portion 52b is located outside the insertion portion 52a in the radial direction.
　先端側接続部５３は、吸口６（図１参照）と接続される開口部５３ａが形成されている。また、先端側接続部５３は、吸口６（図１参照）との接続を解除する押圧式のロック解除ボタン５３ｂを有している。 The tip side connecting portion 53 is formed with an opening 53a connected to the suction port 6 (see FIG. 1). Further, the tip side connecting portion 53 has a pressing type unlock button 53b for releasing the connection with the suction port 6 (see FIG. 1).
　また、延長管５の材料としては、ガラス繊維入りの強化プラスチック、炭素繊維を含有するカーボン樹脂などを挙げることができる。このような材料を用いることによって、延長管５の肉厚を薄く形成して軽量化を図ったとしても、製品としての強度を確保できる。ただし、ガラス繊維や炭素繊維などの強化繊維を含む材料によって形成されるものに限定されるものではなく、強化繊維を含まない合成樹脂で形成されていてもよい。 Further, as the material of the extension tube 5, reinforced plastic containing glass fiber, carbon resin containing carbon fiber, and the like can be mentioned. By using such a material, the strength of the product can be ensured even if the extension pipe 5 is formed to have a thin wall thickness to reduce the weight. However, the present invention is not limited to those formed of a material containing reinforcing fibers such as glass fiber and carbon fiber, and may be formed of a synthetic resin containing no reinforcing fibers.
　また、基端側接続部５２と先端側接続部５３との間の筒状部５１は、厚さ（肉厚）が不均一であって、不定常なパターンによって構成された凹凸面（凹凸形状）５１ａ（図３参照）および凹凸面（凹凸形状）５１ｂ（図３参照）が形成されている。なお、延長管５は、空気が通る部材であるので、延長管５の外周面に孔形状のものは形成されていない。この凹凸面５１ａ，５１ｂは、トポロジー最適化によって、最適な材料の密度分布が導き出される。換言すると、トポロジー最適化によって、延長管５の構造に不必要な部分については削除（薄肉にする）することが行われる。これにより、強度を損なわずに軽量化可能な３次元構造のものを生成できる。 Further, the tubular portion 51 between the base end side connecting portion 52 and the tip end side connecting portion 53 has a non-uniform thickness (thickness) and has an uneven surface (concavo-convex shape) formed by an irregular pattern. ) 51a (see FIG. 3) and a concave-convex surface (concave-convex shape) 51b (see FIG. 3) are formed. Since the extension pipe 5 is a member through which air passes, a hole-shaped extension pipe 5 is not formed on the outer peripheral surface of the extension pipe 5. The optimum material density distribution of the uneven surfaces 51a and 51b is derived by topology optimization. In other words, by topology optimization, unnecessary parts of the structure of the extension pipe 5 are deleted (thinned). As a result, it is possible to generate a three-dimensional structure that can be reduced in weight without impairing the strength.
　図３は、第１実施形態の延長管の不定常パターンを示す概略断面図である。
　図３に示すように、延長管５は、管の外壁面５１ｓと内壁面５１ｔとに凹凸面（凹凸部）５１ａ，５１ｂが形成されている。この凹凸面５１ａ，５１ｂは、規則的なパターンではなく、不定常なパターンである。すなわち、凹凸面５１ａは、凹部５５ａ，５５ｂ，５５ｃと、凸部５６ａ，５６ｂと、を有し、凹状部分の面積が異なっている。また、凹凸面５１ｂ（凹凸部）は、凹部５５ａ，５５ｂ，５５ｃと対応する位置に凹部５７ａ，５７ｂ，５７ｃを有し、凸部５６ａ，５６ｂに対応する位置に凸部５８ａ，５８ｂを有している。なお、延長管５は、凹部５５ａ～５５ｃと凹部５７ａ～５７ｃとが対向しない構成であってもよい。また、凸部５６ａ，５６ｂと凸部５８ａ，５８ｂとが互いに対向しない構成であってもよい。 FIG. 3 is a schematic cross-sectional view showing an unsteady pattern of the extension pipe of the first embodiment.
As shown in FIG. 3, in the extension pipe 5, uneven surfaces (concavo-convex portions) 51a and 51b are formed on the outer wall surface 51s and the inner wall surface 51t of the pipe. The uneven surfaces 51a and 51b are not regular patterns but irregular patterns. That is, the concave-convex surface 51a has concave portions 55a, 55b, 55c and convex portions 56a, 56b, and the areas of the concave portions are different. Further, the concave-convex surface 51b (concave-convex portion) has concave portions 57a, 57b, 57c at positions corresponding to the concave portions 55a, 55b, 55c, and convex portions 58a, 58b at positions corresponding to the convex portions 56a, 56b. ing. The extension pipe 5 may have a configuration in which the recesses 55a to 55c and the recesses 57a to 57c do not face each other. Further, the convex portions 56a and 56b and the convex portions 58a and 58b may not face each other.
　凹部５５ａ～５５ｃ、５７ａ～５７ｃは、延長管５の管壁の肉厚（厚み）が薄く形成されることによって構成されている。凸部５６ａ，５６ｂ，５８ａ，５８ｂは、延長管５の管壁の肉厚（厚み）が凹部５５ａ～５５ｃの肉厚（厚み）よりも厚く形成されることによって構成されている。 The recesses 55a to 55c and 57a to 57c are formed by forming the thickness (thickness) of the pipe wall of the extension pipe 5 to be thin. The convex portions 56a, 56b, 58a, 58b are formed by forming the wall thickness (thickness) of the extension pipe 5 to be thicker than the wall thickness (thickness) of the concave portions 55a to 55c.
　なお、図３では、延長管５は、軸方向（長手方向）の凹凸面５１ａ，５１ｂのパターンが不定常となることによって構成されている。しかし、凹凸面５１ａ，５１ｂは、軸方向だけではなく、延長管５の周方向においても不定常パターンＰとなるように構成されている。 Note that, in FIG. 3, the extension pipe 5 is configured such that the patterns of the uneven surfaces 51a and 51b in the axial direction (longitudinal direction) become unsteady. However, the uneven surfaces 51a and 51b are configured to have an unsteady pattern P not only in the axial direction but also in the circumferential direction of the extension pipe 5.
　図４は、第１実施形態の延長管の肉厚を引いた場合の概略断面図である。
　図４に示すように、延長管５の不定常パターンＰ（図３参照）は、肉厚を薄くすること（引くこと：－ｄ）、例えば、延長管５の表面に凹部５５ａを形成することによって構成される。なお、図示していないが、肉厚を薄くする方法は、延長管５の内壁面（裏面）５１ｔに凹部を形成することによって構成してもよく、または図３で示したように延長管５の外壁面５１ｓと内壁面５１ｔの双方に凹部を形成することによって構成してもよい。 FIG. 4 is a schematic cross-sectional view when the wall thickness of the extension pipe of the first embodiment is subtracted.
As shown in FIG. 4, the non-stationary pattern P (see FIG. 3) of the extension tube 5 is to reduce the wall thickness (pull: −d), for example, to form a recess 55a on the surface of the extension tube 5. Consists of. Although not shown, the method of reducing the wall thickness may be configured by forming a recess in the inner wall surface (back surface) 51t of the extension pipe 5, or as shown in FIG. 3, the extension pipe 5 It may be configured by forming recesses on both the outer wall surface 51s and the inner wall surface 51t.
　図５は、本実施形態の延長管の肉厚を足した場合の概略断面図である。
　図５に示すように、延長管５の不定常パターンＰ（図３参照）は、肉厚を増やすこと（足すこと：＋ｄ）、例えば、延長管５の表面に凸部５６ａを形成することによって構成される。なお、図示していないが、肉厚を厚くする方法とは、延長管５の内壁面（裏面）に凸部を形成することによって構成してもよく、または図３で示したように延長管５の外壁面５１ｓと内壁面５１ｔの双方に凸部を形成することによって構成してもよい。 FIG. 5 is a schematic cross-sectional view when the wall thickness of the extension pipe of the present embodiment is added.
As shown in FIG. 5, the non-stationary pattern P (see FIG. 3) of the extension tube 5 is formed by increasing the wall thickness (addition: + d), for example, by forming a convex portion 56a on the surface of the extension tube 5. It is composed. Although not shown, the method of increasing the wall thickness may be configured by forming a convex portion on the inner wall surface (back surface) of the extension pipe 5, or as shown in FIG. 3, the extension pipe. 5 may be configured by forming convex portions on both the outer wall surface 51s and the inner wall surface 51t.
　以下、トポロジー最適化によって導き出された延長管５の評価方法について説明する。図６Ａおよび図６Ｂは、延長管の横方向圧縮の評価条件を示す模式図である。図７Ａおよび図７Ｂは、延長管の縦方向圧縮の評価条件を示す模式図である。図８Ａおよび図８Ｂは、延長管のたわみ変形の評価条件を示す模式図である。図９Ａ～図９Ｃは、延長管のねじり変形の評価条件を示す模式図である。なお、以下で示す評価方法は、一例であって本実施形態に限定されるものではなく、これらの一部を選択して評価するようにしてもよい。 Hereinafter, the evaluation method of the extension pipe 5 derived by the topology optimization will be described. 6A and 6B are schematic views showing evaluation conditions for lateral compression of the extension tube. 7A and 7B are schematic views showing evaluation conditions for longitudinal compression of the extension tube. 8A and 8B are schematic views showing the evaluation conditions for the deflection deformation of the extension pipe. 9A to 9C are schematic views showing evaluation conditions for torsional deformation of the extension pipe. The evaluation method shown below is an example and is not limited to the present embodiment, and some of them may be selected and evaluated.
　図６Ａおよび図６Ｂに示すように、横方向圧縮を評価する場合には、延長管５の４か所（Ａ～Ｄ）に荷重を与えて評価する。なお、図６Ａは、紙面垂直手前方向が延長管５の上面である。また、図６Ｂは、紙面垂直手前方向が延長管５の左側面である。また、図６Ａの評価は、延長管５を単純に横方向からつぶすように荷重をかけた場合を想定している。図６Ｂの評価は、延長管５を上から足で踏んだ場合を想定している。 As shown in FIGS. 6A and 6B, when evaluating lateral compression, a load is applied to four points (A to D) of the extension pipe 5 for evaluation. In FIG. 6A, the vertical front direction of the paper surface is the upper surface of the extension tube 5. Further, in FIG. 6B, the vertical front direction of the paper surface is the left side surface of the extension tube 5. Further, the evaluation of FIG. 6A assumes a case where a load is applied so as to simply crush the extension pipe 5 from the lateral direction. The evaluation of FIG. 6B assumes the case where the extension pipe 5 is stepped on with a foot from above.
　図６Ａに示すように、延長管５の軸方向を４等分したときに、先端側接続部５３の端部から４分の１（１／４）の位置をＡとし、２分の１（１／２）の位置（中央）をＢとし、４分の３（３／４）の位置をＣとする。これらＡ，Ｂ，Ｃの位置において、延長管５の右側面から荷重を与え、かつ、破線で示すように荷重を与える反対側（左側面）を拘束した状態にして評価する。 As shown in FIG. 6A, when the axial direction of the extension pipe 5 is divided into four equal parts, the position of a quarter (1/4) from the end of the tip side connecting portion 53 is defined as A, and the position is halved (1/4). Let B be the position (center) of 1/2) and C be the position of 3/4 (3/4). At these positions A, B, and C, the load is applied from the right side surface of the extension pipe 5, and the opposite side (left side surface) to which the load is applied is restrained as shown by the broken line for evaluation.
　図６Ｂに示すように、延長管５の軸方向（長手方向）の中央（先端側接続部５３から２分の１（１／２）の位置）をＤとする。この位置Ｄにおいて、延長管５の上面から荷重を与え、かつ、破線で示すように荷重を与える反対側（下面）を拘束した状態にして評価する。なお、位置Ａ～Ｄに与える荷重は、延長管５の材料や、延長管５の長さおよび径などに応じて適宜決定されるものである。 As shown in FIG. 6B, let D be the center of the extension pipe 5 in the axial direction (longitudinal direction) (the position of half (1/2) from the tip side connecting portion 53). At this position D, the load is applied from the upper surface of the extension pipe 5, and the opposite side (lower surface) to which the load is applied is restrained as shown by the broken line for evaluation. The load applied to the positions A to D is appropriately determined according to the material of the extension pipe 5, the length and diameter of the extension pipe 5, and the like.
　図７Ａおよび図７Ｂは、延長管５の基端側接続部５２を上側にし、先端側接続部５３を下側にして、白抜き矢印で示すように、基端側接続部５２から先端側接続部５３に向けて押したときを想定している。
　図７Ａおよび図７Ｂに示すように、縦方向（軸方向）圧縮を評価する場合には、基端側接続部５２の軸方向の端面５２ｃから軸方向に荷重を与え（図７Ｂ参照）、かつ、破線で示すように先端側接続部５３の軸方向の端面５３ｃを拘束した状態（図７Ａ参照）にして評価する。 In FIGS. 7A and 7B, the proximal end side connecting portion 52 of the extension pipe 5 is on the upper side and the distal end side connecting portion 53 is on the lower side, and as shown by the white arrows, the proximal end side connecting portion 52 is connected to the distal end side. It is assumed that the button is pushed toward the unit 53.
As shown in FIGS. 7A and 7B, when evaluating the longitudinal (axial) compression, a load is applied in the axial direction from the axial end surface 52c of the proximal end side connecting portion 52 (see FIG. 7B). , As shown by the broken line, the end face 53c in the axial direction of the tip side connecting portion 53 is restrained (see FIG. 7A) for evaluation.
　図８Ａおよび図８Ｂは、延長管５の長手方向（軸方向）の中央を手で押したときを想定している。
　図８Ａにおいてドットで示すように、延長管５の先端側接続部５３の内壁面５３ａ１を拘束し、かつ、図８Ｂにおいてドットで示すように、延長管５の基端側接続部５２の外壁面５２ａ１を拘束した状態において、延長管５の長手方向（軸方向）の中央（白抜き矢印）に荷重を与えることで評価する。 8A and 8B assume that the center of the extension pipe 5 in the longitudinal direction (axial direction) is pushed by hand.
As shown by dots in FIG. 8A, the inner wall surface 53a1 of the tip end side connecting portion 53 of the extension pipe 5 is restrained, and as shown by dots in FIG. 8B, the outer wall surface of the proximal end side connecting portion 52 of the extension pipe 5 is restrained. The evaluation is made by applying a load to the center (white arrow) of the extension pipe 5 in the longitudinal direction (axial direction) while the 52a1 is restrained.
　図９Ａ～図９Ｃは、吸口６（図１参照）を繋いだ状態で、左右にねじった場合を想定している。
　図９Ａにおいてドットで示すように、延長管５の先端側接続部５３の内壁面５３ａ１を拘束し、かつ、図９Ｂにおいてドットで示すように、延長管５の基端側接続部５２の外壁面５２ａ１を拘束した状態において、図９Ｃに示すように、外壁面５２ａ１を反時計回り方向をねじる荷重を与えることで評価する。 9A to 9C assume a case where the mouthpiece 6 (see FIG. 1) is connected and twisted to the left and right.
As shown by dots in FIG. 9A, the inner wall surface 53a1 of the tip end side connecting portion 53 of the extension pipe 5 is restrained, and as shown by dots in FIG. 9B, the outer wall surface of the proximal end side connecting portion 52 of the extension pipe 5 is restrained. With the 52a1 restrained, as shown in FIG. 9C, the outer wall surface 52a1 is evaluated by applying a load that twists in the counterclockwise direction.
　このように、トポロジー最適化によって、厚さが不均一であり、不定常パターンＰを有する延長管５を構成する。そして、図６Ａおよび図６Ｂ、図７Ａおよび図７Ｂ、図８Ａおよび図８Ｂ、図９Ａ～図９Ｃに示す評価試験を行うことによって、トポロジー最適化によって得られた凹凸形状が得られた延長管５が製品として成り立つか否かを確認する。 As described above, the extension tube 5 having a non-uniform thickness and an unsteady pattern P is configured by the topology optimization. Then, by performing the evaluation tests shown in FIGS. 6A and 6B, 7A and 7B, 8A and 8B, and 9A to 9C, the extension tube 5 in which the uneven shape obtained by the topology optimization was obtained. Check whether or not is valid as a product.
　以上説明したように、第１実施形態の延長管５は、筒状に形成される筒状部５１を有し、筒状部５１は、当該筒状部５１の一端に掃除機本体２と間接的に接続される基端側接続部５２と、当該筒状部５１の他端に吸口６が接続される先端側接続部５３と、を備え、筒状部５１は、厚さが不均一な不定常パターンＰを有する。これによれば、延長管５の強度を落とさずに軽量化できる。 As described above, the extension pipe 5 of the first embodiment has a cylindrical portion 51 formed in a cylindrical shape, and the tubular portion 51 is indirectly connected to the vacuum cleaner main body 2 at one end of the cylindrical portion 51. The base end side connecting portion 52 to be specifically connected and the tip end side connecting portion 53 to which the suction port 6 is connected to the other end of the cylindrical portion 51 are provided, and the tubular portion 51 has a non-uniform thickness. It has an unsteady pattern P. According to this, the weight can be reduced without reducing the strength of the extension pipe 5.
　また、第１実施形態は、不定常パターンＰは、筒状部５１の厚さを引くことによって構成されている。これによれば、延長管５の軽量化に寄与できる。 Further, in the first embodiment, the non-stationary pattern P is configured by subtracting the thickness of the cylindrical portion 51. According to this, it is possible to contribute to the weight reduction of the extension pipe 5.
　また、第１実施形態は、不定常パターンＰは、筒状部５１の厚さを足すことによって構成されている。これによれば、延長管５の必要な強度を確保できる。 Further, in the first embodiment, the non-stationary pattern P is configured by adding the thickness of the cylindrical portion 51. According to this, the required strength of the extension pipe 5 can be secured.
　また、第１実施形態の電気掃除機１は、電動送風機２０を内蔵した掃除機本体２と、掃除機本体２に接続される延長管５と、を備えている。これによれば、さらなる軽量化によって、電気掃除機１の取り扱い性を向上させることができる。 Further, the vacuum cleaner 1 of the first embodiment includes a vacuum cleaner main body 2 incorporating an electric blower 20 and an extension pipe 5 connected to the vacuum cleaner main body 2. According to this, the handleability of the vacuum cleaner 1 can be improved by further reducing the weight.
（第２実施形態）
　図１０は、第２実施形態の延長管を示す断面図である。
　図１０に示すように、延長管５Ａは、筒状部５１の外壁面（外面）５１ｓに凹凸面５１ａが形成されている。凹凸面５１ａは、厚さが不均一で不定常パターンＰからなる凹部５５ａ～５５ｃと凸部５６ａ，５６ｂとによって構成されている。また、延長管５Ａの内壁面（裏面）５１ｕは、図３に示す凹凸のある面ではなく、滑らかな面（段差の無い面、凹凸の無い面）が形成されている。換言すると、内壁面５１ｕは、軸方向に沿って略直線状かつ径方向に沿って略円形状に形成されている。 (Second Embodiment)
FIG. 10 is a cross-sectional view showing an extension pipe of the second embodiment.
As shown in FIG. 10, in the extension pipe 5A, an uneven surface 51a is formed on the outer wall surface (outer surface) 51s of the tubular portion 51. The uneven surface 51a is composed of recesses 55a to 55c having a non-uniform thickness and formed of an unsteady pattern P, and convex portions 56a and 56b. Further, the inner wall surface (back surface) 51u of the extension pipe 5A is formed with a smooth surface (a surface without steps, a surface without unevenness) instead of the uneven surface shown in FIG. In other words, the inner wall surface 51u is formed in a substantially straight line along the axial direction and a substantially circular shape along the radial direction.
　このように、第２実施形態の延長管５Ａは、筒状部５１の外壁面５１ｓ（外側）に凹凸面５１ａを有するとともに、当該筒状部５１の内壁面５１ｕに滑らかな面を有する。これにより、ごみの引っ掛かりを防いで、吸い込み抵抗になることを防止することが可能になる。 As described above, the extension pipe 5A of the second embodiment has an uneven surface 51a on the outer wall surface 51s (outside) of the tubular portion 51 and a smooth surface on the inner wall surface 51u of the tubular portion 51. This makes it possible to prevent dust from being caught and prevent it from becoming a suction resistance.
（第３実施形態）
　図１１は、第３実施形態の延長管の凸部の粗密を示す概略図である。
　図１１に示すように、第３実施形態の延長管５Ｂは、軸方向（長手方向）の一端の基端側接続部５２側に形成される凸部５６ａの密度（密集度）が疎となるように構成されている。また、延長管５Ｂは、軸方向（長手方向）の他端の先端側接続部５３側に形成される凸部５６ａの密度（密集度）が疎となるように構成されている。なお、凸部５６ａの密度が疎とは、凸状に形成されている面積が少なく形成されていることを意味する。これにより、延長管５Ｂにおいて比較的強度を確保できる端部の肉厚を少なくすることによって、延長管５Ｂの軽量化に寄与することができる。 (Third Embodiment)
FIG. 11 is a schematic view showing the density of the convex portion of the extension pipe of the third embodiment.
As shown in FIG. 11, in the extension pipe 5B of the third embodiment, the density (denseness) of the convex portion 56a formed on the proximal end side connecting portion 52 side of one end in the axial direction (longitudinal direction) becomes sparse. It is configured as follows. Further, the extension pipe 5B is configured so that the density (denseness) of the convex portions 56a formed on the tip side connecting portion 53 side of the other end in the axial direction (longitudinal direction) becomes sparse. The fact that the density of the convex portion 56a is sparse means that the area formed in the convex shape is small. As a result, it is possible to contribute to the weight reduction of the extension pipe 5B by reducing the wall thickness of the end portion where the strength can be relatively secured in the extension pipe 5B.
　また、延長管５Ｂは、軸方向（長手方向）の中央において、凸部５６ａの密度（密集度）が密となるように構成されている。なお、凸部５６ａの密度が密とは、凸状に形成されている面積が延長管５Ｂの軸方向の両端部より多く形成されていることを意味する。これにより、延長管５Ｂにおいて比較的強度の低い中央部の肉厚を厚くすることによって、延長管５の強度が低下するのを抑えることができる。 Further, the extension pipe 5B is configured so that the density (denseness) of the convex portions 56a becomes dense in the center in the axial direction (longitudinal direction). The density of the convex portions 56a means that the convexly formed area is formed more than both ends in the axial direction of the extension pipe 5B. As a result, it is possible to suppress a decrease in the strength of the extension pipe 5 by increasing the wall thickness of the central portion having a relatively low strength in the extension pipe 5B.
（第４実施形態）
　図１２は、第４実施形態の延長管の凹凸形状を示す断面図である。
　図１２に示すように、第４実施形態の延長管５Ｃは、シート材６０がインサート成形によって一体に形成されている。ところで、延長管５Ｃを軽量化しようとする場合、貫通した孔形状にすることはできないので、なるべく薄い肉厚の凹部５５ａを形成する必要がある。しかし、成形品で形成しようとする場合には、ある程度肉厚がないと、成形の型内において樹脂が流れなくなる。そこで、肉厚をできるだけ薄く形成する方法として、別部品のシート材６０をインサート成形することによって延長管５Ｃを構成したものである。 (Fourth Embodiment)
FIG. 12 is a cross-sectional view showing the uneven shape of the extension pipe of the fourth embodiment.
As shown in FIG. 12, in the extension pipe 5C of the fourth embodiment, the sheet material 60 is integrally formed by insert molding. By the way, when trying to reduce the weight of the extension pipe 5C, it is not possible to form a through hole shape, so it is necessary to form a recess 55a having a wall thickness as thin as possible. However, in the case of forming with a molded product, the resin does not flow in the molding mold unless the wall thickness is to some extent. Therefore, as a method of forming the wall thickness as thin as possible, the extension pipe 5C is constructed by insert molding the sheet material 60 of another part.
　このように、第４実施形態は、筒状部５１の凹部５５ａが別部品のシート材６０によって構成されている。これによれば、凹部の肉厚を薄く形成することができ、さらなる軽量化を図ることができる。また、さらなる軽量化を求めるのであれば、シート材６０がある程度剛性を有するものに限定されず、膜形状のものであってもよい。 As described above, in the fourth embodiment, the recess 55a of the cylindrical portion 51 is composed of the sheet material 60 as a separate part. According to this, the wall thickness of the recess can be made thin, and the weight can be further reduced. Further, if further weight reduction is required, the sheet material 60 is not limited to a material having a certain degree of rigidity, and may be a film-shaped material.
　なお、前記した実施形態では、延長管５（５Ａ，５Ｂ，５Ｃ）について、トポロジー最適化を利用することによって延長管５に厚さが不均一で不定常なパターンＰが形成される場合を例に挙げて説明したが、延長管５に限定されるものではなく、キャニスター（シリンダー式）掃除機の本体、スティック掃除機の本体、ハンディ掃除機の本体、ロボット掃除機の本体、吸口などの付属品などにもトポロジー最適化を適用して、不均一な厚さで不定常パターンＰを有するものとしてもよい。このような場合においても、強度を落とさず、軽量化を図ることができる。 In the above-described embodiment, for the extension tube 5 (5A, 5B, 5C), a case where a pattern P having a non-uniform thickness and an unsteady thickness is formed on the extension tube 5 by using topology optimization is an example. As explained above, it is not limited to the extension pipe 5, and the main body of the canister (cylinder type) vacuum cleaner, the main body of the stick vacuum cleaner, the main body of the handy vacuum cleaner, the main body of the robot vacuum cleaner, the mouthpiece, etc. are attached. Topology optimization may also be applied to a product or the like to have an unsteady pattern P with a non-uniform thickness. Even in such a case, the weight can be reduced without reducing the strength.
　１　　　電気掃除機
　２　　　掃除機本体
　２０　　電動送風機
　５，５Ａ，５Ｂ，５Ｃ　延長管
　５１　　筒状部
　５１ａ，５１ｂ　凹凸面（凹凸形状）
　５２　　基端側接続部
　５２ａ　挿入部
　５３　　先端側接続部
　５５ａ，５５ｂ，５５ｃ，５７ａ，５７ｂ，５７ｃ　凹部
　５６ａ，５６ｂ，５８ａ，５８ｂ　凸部
　Ｐ　　　不定常パターン 1 Vacuum cleaner 2 Vacuum cleaner body 20 Electric blower 5,5A, 5B, 5C Extension pipe 51 Cylindrical part 51a, 51b Concavo-convex surface (concave and convex shape)
52 Base end side connection part 52a Insertion part 53 Tip side connection part 55a, 55b, 55c, 57a, 57b, 57c Concave part 56a, 56b, 58a, 58b Convex part P Unsteady pattern

Claims (7)

  1. 　筒状に形成される筒状部を有し、
    　前記筒状部は、当該筒状部の一端に掃除機本体と直接的または間接的に接続される基端側接続部と、当該筒状部の他端に吸口が接続される先端側接続部と、を備え、
    　前記筒状部は、厚さが不均一な不定常パターンを有することを特徴とする電気掃除機の延長管。     It has a tubular portion that is formed in a tubular shape, and has a tubular portion.
    The tubular portion has a base end side connection portion that is directly or indirectly connected to the vacuum cleaner body at one end of the tubular portion, and a tip end side connection portion that has a suction port connected to the other end of the tubular portion. And with
    The tubular portion is an extension pipe of a vacuum cleaner characterized by having an irregular pattern having a non-uniform thickness.
  2. 　請求項１に記載の電気掃除機の延長管であって、
    　前記不定常パターンは、前記筒状部の厚さを引くことによって構成されていることを特徴とする電気掃除機の延長管。     The extension pipe of the vacuum cleaner according to claim 1.
    The non-stationary pattern is an extension tube of a vacuum cleaner, characterized in that it is formed by subtracting the thickness of the cylindrical portion.
  3. 　請求項１に記載の電気掃除機の延長管であって、
    　前記不定常パターンは、前記筒状部の厚さを足すことによって構成されていることを特徴とする電気掃除機の延長管。     The extension pipe of the vacuum cleaner according to claim 1.
    The non-stationary pattern is an extension pipe of a vacuum cleaner, characterized in that it is formed by adding the thicknesses of the tubular portions.
  4. 　請求項１に記載の電気掃除機の延長管であって、
    　前記筒状部は、当該筒状部の外側に凹凸形状を有するとともに、当該筒状部の内側に滑らかな形状を有することを特徴とする電気掃除機の延長管。     The extension pipe of the vacuum cleaner according to claim 1.
    The tubular portion is an extension pipe of an electric vacuum cleaner, characterized in that the tubular portion has a concave-convex shape on the outside of the tubular portion and a smooth shape on the inside of the tubular portion.
  5. 　請求項４に記載の電気掃除機の延長管であって、
    　前記筒状部の長手方向の中央部に、他の部分よりも凸部が密に形成されていることを特徴とする電気掃除機の延長管。     The extension pipe of the vacuum cleaner according to claim 4.
    An extension pipe of an electric vacuum cleaner, characterized in that a convex portion is formed more densely in a central portion in the longitudinal direction of the tubular portion than in other portions.
  6. 　請求項４に記載の電気掃除機の延長管であって、
    　前記筒状部の凹部は、別部品によって構成されていることを特徴とする電気掃除機の延長管。     The extension pipe of the vacuum cleaner according to claim 4.
    The recess of the cylindrical portion is an extension pipe of a vacuum cleaner, characterized in that it is composed of separate parts.
  7. 　電動送風機を内蔵した掃除機本体と、
    　前記掃除機本体に接続され、請求項１から請求項６のいずれか１項に記載の電気掃除機の延長管と、を備えたことを特徴とする電気掃除機。     A vacuum cleaner with a built-in electric blower and
    A vacuum cleaner which is connected to the vacuum cleaner main body and includes an extension pipe of the vacuum cleaner according to any one of claims 1 to 6.
PCT/JP2021/008928 2020-04-27 2021-03-08 Extension hose for electric vacuum cleaner, and electric vacuum cleaner provided with said extension hose WO2021220619A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013009784A (en) * 2011-06-29 2013-01-17 Hitachi Appliances Inc Vacuum cleaner
JP2018015299A (en) * 2016-07-28 2018-02-01 シャープ株式会社 Extension pipe for vacuum cleaner
JP2018202055A (en) * 2017-06-09 2018-12-27 パナソニックＩｐマネジメント株式会社 Extension pipe and vacuum cleaner using the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2603971B1 (en) * 1986-09-12 1989-01-13 Nicoll Raccords Plastiques IMPROVEMENT IN CENTRAL VACUUM CLEANING INSTALLATION PIPING
CN102679078B (en) * 2011-03-16 2015-09-09 北汽福田汽车股份有限公司 Concrete conveyance pipe bend
CN204986052U (en) * 2015-08-17 2016-01-20 天津滨海利德制管有限公司 Anti -oxidant PPR pipe of high strength

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013009784A (en) * 2011-06-29 2013-01-17 Hitachi Appliances Inc Vacuum cleaner
JP2018015299A (en) * 2016-07-28 2018-02-01 シャープ株式会社 Extension pipe for vacuum cleaner
JP2018202055A (en) * 2017-06-09 2018-12-27 パナソニックＩｐマネジメント株式会社 Extension pipe and vacuum cleaner using the same

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