TW487562B - Electric vacuum cleaner hose and electric vacuum cleaner - Google Patents

Abstract

The present invention provides a vacuum cleaner with a hose capable of reducing poor operation, allowing exhausted air from an electric blower built in a cleaner body to be returned into a suction implement via a hose and a pipe. This vacuum cleaner has a suction passage and an exhaust passage formed in a hose 21, a pipe 32 and a suction implement 33 to be connected to a cleaner body in which an electric blower 14 is built, and the exhaust passage serves for returning exhausted air from the electric blower. The hose 21 consists of an outside hose 22 and an inside hose 23 to form the exhaust passage and the suction passage, and a long member is wound on the outside hose 22 and the inside hose 23 to form a tubular and flexible hose which assures easier flexibility of the outside hose 22 than that of the inside hose 23.

Description

487562

V. Description of the invention (1) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economics [Technical Field of the Invention] The present invention relates to an electric vacuum cleaner, and more particularly to exhaust gas discharged by an electric blower built in the vacuum cleaner Exhaust return (circulation) type electric vacuum cleaner and hose that return to the inhaler through the hose and rigid tube. [Advanced technology] General floor-type electric vacuum cleaners exhaust all the exhaust air from the electric blower built in the body of the cleaner through the exhaust ports formed on the back side of the main body, etc. All the generated exhaust gas is discharged, so the exhaust gas is blown out to the outside with a relatively strong wind force. Therefore, this problem occurs that the exhaust air is about to blow up the dust that stagnates on the floor or carpet and spreads to the indoor space. For the purpose of reducing > exhausting the exhaust gas from the outside, or enhancing the dust collection effect, there are solutions disclosed in, for example, Japanese Public Sho Sho 39_36553 or Japanese Patent Laid-Open No. 9-135795. The hard pipe and the inhaler form an electric vacuum cleaner which forms part or all of the exhaust gas discharged by the electric blower while returning the exhaust gas flow path while forming the suction air flow path. However, the above-mentioned electric vacuum cleaner has a double-layered structure of a hose and a rigid tube. The suction flow path is formed on the inside and the exhaust flow path is formed on the outside. However, no particular consideration is given to the specific structure of the hose. In addition, the above-mentioned electric vacuum cleaner has the disadvantages that the hose and the rigid pipe are made into a double reconstruction, so that it is difficult to bend the hose and the operability of the hose is not good. [Problems to be Solved by the Invention] The object of the present invention is to provide a III which can reduce the deterioration of operability. ---------III-III I --- ^ --- IIIII (Please read the precautions on the back first (Fill in this page again.) This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public love) 1 311550 487562 This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public f B7) V. Description of the invention (2) Soft & electric vacuum cleaners return the exhaust gas discharged from the electric blower built in the body of the vacuum cleaner to the inhaler and other parts via hoses and hard pipes. [To solve the problem Means] In order to solve the above-mentioned problem, the first means is to use a hose for an electric vacuum cleaner composed of an outer hose and an inner hose, and the hose is formed by winding a long material and joining the joints. A tube-shaped flexible hose, and the outer hose is formed to be more flexible than the inner hose. Among the first means to solve the above-mentioned problem, the outer hose is made more flexible than the inner hose. Good formation of easily deflected materials. ≫ In the first method, the thickness I of the bonding material used to join the joint portion of the outer hose is preferably thinner than the thickness of the joint material used to join the joint portion of the inner hose. In the i-th means, the thickness of the long-sized material constituting the outer hose is preferably thinner than the thickness of the long-formed material constituting the inner hose. The width of the long-form material constituting the outer hose is preferably narrower than the width of the inner hose. ## In order to solve the second problem of the above problem, the wound is connected to the inside with The hose of the vacuum cleaner body of the electric blower is connected to the rigid tube and the inhaler to form an air suction path and an exhaust flow path for the exhaust air flow of 0 gas ^ discharged by the electric blower. & Consists of an outer hose holder and an inner hose to form an exhaust flow path and a suction flow path. _ Asia and each of the above hoses _____________ 311550 (Please read the precautions on the back before filling this page)

V. Description of the invention (3) It is a tube made of a flexible hose made of a long material, and the upper part and the soft part are joined together to form a tube. In order to solve the above problem, the second inner hose is more flexible than the inner hose. The outer hose is formed of a material that is easier to flex than the inner hose. Better. In order to solve the above-mentioned problem, the joining material of the joint portion of the second hose is preferably made thinner. Shout ... Among the means of solving the above problems, the thickness of the long-shaped material constituting the outer soft camp is preferably thinner than the thickness. Among the second means to solve the above-mentioned problems, the length of the long material in the soft job is set to be wider than the width of the long material forming the inner hose. It is better to be narrow. [Embodiments] Fig. 1 to Fig. 8 show an embodiment of the present invention, which will be described below based on these drawings. In the figure, 1 is the main body of the vacuum cleaner, which is composed of the upper case 2 and the lower case 3 and the dust collecting cover 4 as shown in FIG. 2. The vacuum cleaner body i is formed with a hose connection opening 5 connected to a later-described body-side hose connection portion 17 at the front side, and a slit-shaped exhaust hole is formed at the rear side. The bottom of the vacuum cleaner body is formed by a partition wall 7 to be separated from the upper part of the interior of the vacuum cleaner body 1, and an exhaust flow path B1 communicating with the hose connection opening 5 and an exhaust hole are formed. 6 Connected external exhaust flow path C. The partition wall 7 is set upright. The paper size of the partition wall 7 is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) < J 311550 Printed by the Employees ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 311550 487562 A7 --- ------ B7_____ V. Description of the invention (4) The partition space above the partition wall is divided into front and rear compartments by 8 °. 9 is a dust collection chamber formed in front of the partition wall 8 above. A hose insertion port 9a is formed on a concentric circle of the pipe connection port. A dust bag installation box 11 capable of detachably fixing the dust collecting bag 10 is detachably housed in the dust collecting room 9, and the opening of the dust collecting bag 10 is formed in a state where the device is completed. The hose insertion opening 9a facing the dust collecting chamber 9 described above. 12 is a fine dust filter installed on the partition wall 8 above, and is located behind the dust collecting bag 10 to remove fine dust. 13 is an electric blower accommodating chamber formed behind the partition wall 8 described above, and the electric blower 14 is housed inside. An opening 13a is formed below the electric blower accommodating chamber 13 so as to communicate the electric blower accommodating chamber 13 with the above-mentioned exhaust flow path B1 and the external exhaust flow path c. The exhaust gas is divided by the ribs 15 provided vertically in the lower box 3, part of which is introduced into the hose connection port 5 side through the above-mentioned opening 13a through the above-mentioned exhaust flow path B1, and the other part is through the above-mentioned opening i3a through the external exhaust flow Path C, and is discharged out of the cleaner body 1 through the exhaust hole 6 through an exhaust filter 16 provided in the exhaust hole 6. 17 is a body-side hose connection part connected to a hose 2m described later and installed at the hose connection port $, as shown in Figs. 3 and 4, a cylindrical outer hard tube 18 and the outside The hard tube 18 has a double structure in which a plurality of supporting ribs form an integral inner hard tube 19. -Connect one end of the hose connection port 5 installed on the outer hard pipe 18 above to form a fastening claw 18a 'for fastening the fastened portion "provided on the hose connection port 5 and the other end side to the pipe The axis direction is inclined to form a bolt-like standard other than the standard of this paper ~ -—- (Please read the precautions on the back before filling this page)

487562 Canton .A7

The above-mentioned inner hard pipe 19 is longer than the outer hard pipe 18 to be attached to and connected to one end of the hose connection port 5 so that the end portion protrudes from the dust collecting chamber 9 by the hose insertion port%. The other end side is also made longer than the outer rigid tube 18, and the outer peripheral side is formed with an inner rib 19b inclined in the same direction as the outer rib j 8b of the outer rigid tube 8. In the figure, 20 is a cylindrical cover provided to cover the connection hose 21 side of the body-side hose connection portion 17. Ribs 18b. The above body side hose connecting portion 17 printed by the employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is the above body side hose connecting portion 17 after the above-mentioned fastening claw 18a is fastened to the hose connection opening 5 of the above vacuum cleaner body 1. The inner hard tube 19 protrudes from the above-mentioned dust collecting chamber 9 and communicates with the dust collecting chamber, and the inner hard tube 19 becomes the suction air flow path A2. Furthermore, the outer hard tube 18 communicates with the exhaust flow path Bi in the cleaner body 1, and the outer hard tube 18 and the inner hard tube 19 become an exhaust flow path B2. 21 is a hose that is connected to the body-side hose connection part I? And a hose connection part 27 described later, and is an outer hose as shown in FIG. 5. Double structure with inner hose 23. As shown in FIG. 6, the outer hose 22 is made of a styrene-based elastic plastic (elastomer) and is thinner than the inner hose 23, and is wound into a spiral shape. The joint portion 22a at the widthwise end portion is formed into a tube by joining with an adhesive made of polypropylene, and a spiral-shaped protrusion 22b is formed at each of the joint portion 22a and a substantially central portion of the long-sized material in the width direction. And 22c. A conductive coil wire 22d serving as a signal line is housed in the projection 22b, and a shape-preserving coil wire 22e is housed in the projection 22c. As the coil line 22d of the outer hose 22! Μ ----------------- ^ (Please read the precautions on the back before filling this page} This paper size applies to Chinese national standards ( CNS) A4 specification (210 X 297) 5 311550 A7 B7 5. Description of the invention (6) The strength of the soft & 21 is ensured. In addition, the outer hose is made of translucent material. On the one hand, the inner hose 23 is shown in Fig. 7 and is formed with the outer hose 5. The long material made of styrene-based elastic plastic is wound into a spiral shape, and the width of the long material is The joints 23a at the end portions in the direction are formed into a tubular shape by joining with a bonding agent made of polypropylene, and at the joints ... the substantially central portions of the inch-shaped material in the width direction each have spiral protrusions 23b and 23c. The above inner hose 23 is formed by adding a coloring agent to the styrene-based elastic plastic to form opaqueness, so that the inner hose can be seen through the outer hose 22. When manufacturing this hose 21, first, the inner hose is made The winding ribs 23 of the steering wheel body side hose connection portion 17 are inclined in the same direction, and then the inner hose 23 Check the inner rib to jump inside. At this time, the -end side of the inner hard tube 19 used to connect the hose 21 is more protruding than the outer hard tube, so the inner tube-once is hooked first at this protruding part and then It can be installed by inserting it. Therefore, the installation and connection of the inner hose is easy. It is the same as the case where the inner hose is connected to the ladies, so that the winding direction of the outer hose 22 is the same as that of the main body side hose connection portion 17 The outer ribs i8b are inclined in the same direction, and then the outer hose 22 is bolted into the outer ribs 18b. Then, the installation and connection of the hose 21 to the body-side hose connection portion 17 is completed: It communicates with the suction flow path A2 of the main body side hose connection part 17 and becomes the suction flow path A3. On the other hand, the space between the outer hose and the inner part 23 is connected with the exhaust of the main body side hose connection part 17 Flow path This paper scale applies CNS A4 specification (_21 () χ 297 public love) — 6 311550 V. Description of the invention (7: B2 is connected to become exhaust flow path B3. At this time, 'peak tube 23 The winding age is in the same direction as the winding side food of the outer hose 22, so the directions in which the inner hose 23 and the outer hose 22 are easily twisted are in the same direction. Therefore, in the use of the vacuum cleaner body i, the hose 24 is twisted or torn, and the outer hose 23 and the inner hose η will follow each other to twist or bend, so the outer hose 22 and the inner hose 23 is not resistant to twisting or bending, and can ensure the softness of the soft palate. 24 is connected at one end to the hose 21, and the other end is provided with a grip portion for connecting the hard pipe 32 described later. It consists of a handle part 35 for attaching and connecting the rigid pipe 32 and a hose connection part 27 for attaching the one end side of the connection hose 21 to the handle part 35 at the other end side. The hose connection part 27 is a cylindrical outer hard tube 28 and the double structure formed by the inner hard tube 29 which is integrated with the outer hard tube 28 by supporting ribs 29a, and is provided with a cover 31 to cover the end of the connection hose 21. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the outer hard tube 28 and inner hard tube 29 are each formed on the outer periphery with the same inclined outer ribs as the outer ribs 18b and inner ribs i9b of the body-side hose connection portion 17 28a and the inner ribs 29a form a structure in which the outer hose 22 and the inner hose 23 of the hose 21 can be rotated by rotating in the same direction. Therefore, the assembly operation is simple and easy. Then, the space between the outer hard tube 28 and the inner hard tube 29 communicates with the exhaust flow path B3 of the hose 21 and becomes the exhaust flow path B4. The inside hard tube 29 communicates with the suction flow path A3 inside the hose 21 and becomes the suction flow path A4. The handle part 35 above is printed by the tubular part 25 with a slightly L-shape, and this paper size applies the Chinese National Standard (CNS) A4 specification (21 × 297 mm).

A7 V. Description of the invention (S) A handle 26 extending over the tubular portion 25, such as a handle of a vehicle, is formed, and a mounting opening 25a for mounting and connecting a hard pipe 32 is formed, and an upper portion of the mounting opening 25a is provided. Holder 25b. A cylindrical portion 30 communicating with the mounting port 25 & and inserting the end portion of the inner hard tube 29 is formed inside. The cylindrical portion 30 is communicated with the breast pumping flow path A4 of the inner hard tube 29 to become Suction airflow path 85; and communicates the space between the outer side of the cylindrical part% and the outer contour of the grip part 24 with the exhaust flow path formed by the inner hard tube 29 and the outer hard tube 28, and becomes an exhaust flow. Road B5. Reference numeral 32 denotes a connection hard pipe which is fastened to the holder 25b and is attached to the mounting port 25a of the grip portion 24, and is formed by connecting two hard pipes 32a. The connecting rigid pipe 32 is composed of an outer cylindrical portion 32b having a slightly circular cross section and an inner cylindrical portion 32c which is eccentric with the outer cylindrical portion 32b and whose upper portion is integrated with the outer cylindrical portion 3, and The inner cylindrical portion 32c and the outer cylindrical portion 3 form a half-hook-shaped space. When this connection hard tube 32 is mounted on the grip portion 24, the inner cylindrical portion 32c communicates with the suction flow path 85 of the grip portion 24 to form an suction flow path A6 inside, and the outer local portion 32b and the inner portion The cylindrical portions 32c communicate with the exhaust flow path B5 of the grip portion 24 to form an exhaust flow path B6. The exhaust through the exhaust flow path B6 is clean air that has passed through the dust collection bag 10 or the fine dust filter 12 of the cleaner body ^ to remove dust. Therefore, this embodiment focuses on the need not to worry about the inner cylindrical portion 32 It is necessary to form a substantially circular cross section by being clogged with dust. As described above, the exhaust flow path B6 is formed into a substantially half-hook-shaped cross section, and the outer cylindrical portion 32b is formed into a substantially circular cross section. 33 is an inhaler connected to the connecting hard tube 32. The joints 33a and 3 3b connected to the connecting hard tube ^ have a double concentric circle structure, and the above-mentioned paper size applies the Chinese National Standard (CNS) A4 specification ( 21〇X 297 mm) ;, — ^ — " I order --------- (Please read the precautions on the back before filling out this page) 1 1 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 '~ ^ -----____ V. Description of the invention (9) The part to be connected to the hard pipe 32 is the same shape as the hard pipe 32. The electric vacuum cleaner configured as described above, when in use, due to the suction of the electric blower 14, the air mixed with dust by the inhaler 33 is sucked through the suction flow path A5 of the hard pipe 32 and the suction of the hose 21 The flow path A3 enters the cleaner body 1. In the vacuum cleaner body i, the air that has been removed by the dust collecting bag and then purified by the fine dust filter 12 is sucked by the electric blower 14 and cools the electric blower 14. Then, a part of the exhaust gas discharged by the electric blower 14 is discharged to the outside through the exhaust hole 6 of the cleaner body 1, and the rest passes through the exhaust flow channel 3 through the exhaust flow path B1 of the cleaner body 1. At this time, since the directions of the protrusions 22b and 22c of the outer hose 22 and the directions of the protrusions 23b and 23c of the inner hose 23 are formed in the same direction, the protrusions 23b and 23c are opposite to the outer hose 22 and The resistance of air flow between the inner hoses 23 is reduced. In addition, the flow loss of the hose 21 in the exhaust flow path B3 can be suppressed. As described above, the thickness of the long-formed material constituting the outer hose 22 is made thinner than the thickness of the long-formed material constituting the inner hose 23, and the outer hose 22 is formed more easily than the inner hose 23. Since the inside hose 23 has a suction flow path A3, the inside hose 23 has a negative pressure 'and the space between the outside hose 22 and the inside hose 23 has an exhaust flow path B3, so the pressure is positive. Therefore, the inner hose 23 has the effect of deforming inward, but since the inner hose 23 is more difficult to flex than the outer hose 22, it can prevent deformation in the diameter direction due to the suction pressure, and can prevent the inner hose 23 from moving inward. Increased dust ventilation resistance due to reduced cross-sectional area of internal deformation. Also, even if you carefully step on the hose 21 so that it is pressed down I -------- t --------- ^ (Please read the precautions on the back before filling this page ) This paper size applies Chinese national standard specifications (21 × 297 mm) 9 311550 487562 A7 V. Description of the invention (10) When the flat force acts, it can also prevent the inner hose which is difficult to confirm from the outer side of the outer hose 22 The deformation of 23 can eliminate the problems specific to the hose 21 having a double structure. In addition, since the outer hose 22 is more easily deflected, the force to bend the outer hose 22 is reduced, and the strength of the entire flexed hose 21 is reduced, so that the operability of the hose 21 can be reduced. The exhaust gas passing through the exhaust flow path B3 of the hose 21 is returned to the inhaler 33 through the exhaust flow path B6 connected to the hard pipe 32, and the dust blown up by the exhaust wind is recycled to the connection The suction flow path A6 of the hard tube 32. As described above, since a part of the exhaust gas flows back, the exhaust air blown out from the outside is reduced and weakened, so it can be effectively suppressed, and the dust is diffused into the room air during the vacuuming operation. ^ In the above embodiment, the thickness of the long-form material constituting the outer hose 22 is made thinner than the thickness of the long-form material constituting the inner hose 23 to make the outer hose 22 easier to flex. The width of the long-sized material constituting the outer hose 22 is made narrower than the width of the long-sized material constituting the inner hose 23, so that the interval between the joint portions 22a is shortened, so that the outer hose 23 can be easily bent. In this way, the same effect as that of the above embodiment can be obtained. Moreover, in the above-mentioned embodiment, the thickness of the long-sized material constituting the outer hose 22 is made thinner than that of the long-sized material constituting the inner hose 23, so that the outer hose 22 is more easily bent, but the joint The thickness of the protrusion 22b (joining material) of the joint portion of the outer hose 22 is made thinner than the thickness of the protrusion 23b (joining material) that joins the inner hose, so that the outer hose 22 = 'This paper size applies Cap National Standard (CNS) A4 Specification Coffee χ 297 Public Director) _ 川] _ (Please read the precautions on the back before filling this page)

Printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 487562 V. Description of the invention (11) It is also easy to deflect, and this structure can also obtain the same effect as the above embodiment. The hose 21 is generally formed by a gas vinyl machine. However, dioxin, which has an adverse impact on the environment, will be produced during incineration, so it is too extravagant to prepare, ^ ^ Therefore, this example considers environmental issues. 'The outer hose 22 and the inner soft f 23 are made of stupid vinyl plastic. . In order to make the outer hose 22 easier to flex than the inner hose 23, the inner hose 23 is made of stupid vinyl-based elastic plastic, and the outer hose 22 is made of a material that is easier to flex than the inner hose 23. For example, it may be made of an olefin-based elastic plastic to make it easier for the outer soft 22 to flex. In addition, the same function and effect as those of the above embodiment can be obtained by using this structure. In addition, the material used for the hose 21 is not limited only as long as the material used for the outer hose 22 is easier to flex than the material used for the inner hose 23 so that the outer hose 22 is easier to flex. The elastic plastic used in this embodiment is used. [Effects of the Invention] According to the present invention, since the outer hose is formed to be more flexible than the inner hose, it can be prevented that the inner hose is under negative pressure in the inner hose and between the inner hose and the outer hose. Deformation in the diameter direction due to positive pressure in the exhaust gas flow path or external pressure can prevent the increase in dust ventilation resistance caused by the deformation of the inner hose, and because it makes the outer hose easily flexible Therefore, the force required for flexing the hose has been reduced by the amount of force that can easily be flexed by the outer hose, and the effect of reducing the deterioration of the operability of the hose has been obtained. [Simplified description of the drawing] Fig. 1 is a side section showing the entire structure of the electric vacuum cleaner of the present invention -------------- ^ --- I ---- ^ --- ------ ^ (Please read the notes on the back before filling out this page) This paper size applies to China National Standard (CNS) A4 (210 X 297). 11 311550 487562 Employees ’Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs Print A7 V. Description of the invention (l2 view 'where the middle part of the hose is omitted. Figure 2 is an enlarged cross-sectional view of the body of the electric vacuum cleaner. Figure 3 is a hose connected to the body side of the electric vacuum cleaner Enlarged sectional view of the state of the hose connection part β FIG. 4 is a sectional view of the state where the hose is omitted in FIG. 3. FIG. 5 is a side view of a part of the hose of the electric vacuum cleaner. The figure is a side view of a part of the outer hose in Fig. 5. Fig. 7 is a side view of a part of the inner hose in Fig. 5. Fig. 8 is a side view of the electric vacuum cleaner. A cross-sectional view of the grip part. [Element symbol description] 311550 (Please read the precautions on the back before filling this page)

1 Vacuum cleaner main body 14 Electric blower 17 Main body side hose connection part 18 Rigid tube outside body side hose connection part 18b Main body side hose connection part outside rib 19 Inner body hose connection part inside hard tube 19b Main body side Inner help piece for hose connection 21 Hose 22 Outer hose 23 Inner hose 27 Hose connection 28 28 Rigid tube outside hose connection 28b Rib outside hose connection CNS) A4 specification (21〇x 297 public love)-487562 A7 V. Description of the invention (U) 29 Inner tube of hose connection 29b Inner rib of hose connection 32 Connection of rigid pipe 33 Inhalers A2 to A6 Suction flow path B1 to B6 Exhaust flow path

The paper size printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs applies to the Chinese National Standard (CNS) A4 (210 X 297 mm) 13 311550 ------------- install ------ --Order --------- line (please read the notes on the back before filling this page)

Claims (1)

χ, ί No. 89111697 Patent Application for Amendment of Patent Park ^ Yi Si Gong (January 29, 91). A kind of hose for electric vacuum cleaner is composed of an outer hose and an inner hose. The pipe system is composed of a flexible hose that is wound with a long-length material and joined at a joint to form a tube, and the feeding hose is made more flexible than the inner hose. 2. The hose for an electric vacuum cleaner, such as the one applied for patent_item, wherein the outer hose is formed of a material that is more flexible than the inner hose. 3. If the hose for an electric vacuum cleaner according to item 1 of the patent application scope, wherein the thickness of the joining material joining the joint portion of the outer hose is thinner than that of the joining material joining the joint portion of the inner hose. 4. The hose for an electric vacuum cleaner as described in the patent application No. 丨, wherein the thickness of the long-sized material constituting the outer hose is thinner than that of the long-sized material constituting the inner hose. Printed by the Staff Welfare Committee of the Central Standards Bureau of the Ministry of Economic Affairs. 5. If the hose for an electric vacuum cleaner is in the first scope of the patent application, the width of the long material forming the outer hose is longer than that of the inner hose. The width of the dimensional material is narrow. 6 · An electric vacuum cleaner, which is an exhaust flow path forming a suction flow path in a hose connected to a body of the vacuum cleaner with an electric blower built therein and returning exhaust gas discharged from the electric blower, the hose It consists of an outer hose and an inner hose to form an exhaust flow path and an intake air flow path, and each of the above hoses is formed of a flexible tube that is formed by winding a long material and joining the joints to form a tube. It is easier to form the outer hose than the inner hose. The paper size is applicable to China National Standard (CNS) A4 (210 X 297). 1 311550 487562 Printed by H3 of the Staff Welfare Committee of the Central Standards Bureau of the Ministry of Economic Affairs. Songwriter. 7. The electric vacuum cleaner according to item 6 of the patent application scope, wherein the outer sound is formed by a softer hose than the inner hose. 8. The electric vacuum cleaner according to item 6 of the patent application scope, wherein the thickness of the joining material joining the joint portion of the outer hose is thinner than the joining material joining the joint portion of the inner hose. 9. The electric vacuum cleaner according to item 6 of the patent application scope, wherein the thickness of the long-sized material constituting the outer hose is thinner than that of the long-sized material constituting the inner hose. 10. The electric vacuum cleaner according to item 6 of the applied patent garden, wherein the width of the long-sized material constituting the outer hose is narrower than that of the long-sized material constituting the inner hose. This paper size applies to China National Standard (CNS) A4 specifications (210X 297 public love) 2 311550