TW201306786A - Electrical vacuum cleaner - Google Patents

Abstract

The present invention comprises a vacuum cleaner body, in which an electrical blower is built, the electrical blower generating a suction wind that draws in dust from a surface to be cleaned; and a sound absorption section, which is arranged in a suction wind passage that conducts the suction wind generated by the electrical blower to the vacuum cleaner body. The sound absorption section is composed of the following components: a barrel that forms therein an air suction passage that constitutes in part the suction wind passage and forms at least one opening; a cover that is mounted on the barrel and covers the opening; and a sound absorption member that is arranged between the opening and the cover. The sound absorption member is formed to have a density in a cover side thereof greater than a density of an opening side thereof.

Description

Electric vacuum cleaner Technical field

The present invention relates to an electric vacuum cleaner.

Background technique

In the electric vacuum cleaner, in order to improve the mute performance of the vacuum cleaner, a structure in which a sound absorbing material is disposed in a hand tube provided at an end portion of the extension pipe side of the hose is disclosed (for example, see Patent Document 1).

That is, as shown in FIG. 13A, the conventional vacuum cleaner is composed of an electric vacuum cleaner body 201, a suction hose 203, an extension pipe 204, and a suction member 205. The electric vacuum cleaner body 201 is internally provided with an electric blower (not shown). The suction hose 203 has one end connected to the electric vacuum cleaner body 201 so as to be detachable, and has a hand tube 202 at the other end. The extension tube 204 is connected at one end to the hand tube 202 of the suction hose 203 so as to be detachable. The suction member 205 is connected to the other end of the extension tube 204 so as to be detachable.

As shown in FIG. 13B, a portion of the hand tube 202 of the conventional electric vacuum cleaner is formed with a ridge portion 206, and an air volume adjusting hole 207 is formed above the ridge portion 206. Further, in the air volume adjusting hole 207, the air volume adjusting valve 208 for adjusting the opening area of the air volume adjusting hole 207 to adjust the air volume from the suction member 205 is configured to be slidable, and the air volume adjusting hole 207 and the air volume adjusting valve 208 are provided by the air volume adjusting hole 207. The air volume adjusting mechanism 209 is configured. Further, below the air volume adjusting hole 207, a slit 210 communicating with the hand tube 202 is formed through an appropriate space (not shown). The space formed by the air volume adjusting hole 207 and the slit 210 (not As shown in the figure, a sound absorbing material 211 having a gas permeable property such as a foamed polyurethane foam is disposed.

In addition, a structure in which a sound absorbing material is placed in a hand tube which is provided at an end portion of the extension tube side of the hose is disclosed (for example, see Patent Document 2).

That is, as shown in FIG. 13C, the extension tube 220 of the conventional electric vacuum cleaner (not shown) is composed of a cylindrical body 222, an inner cover 224, an outer cover 225, and a sound absorbing material 226. The cylindrical body 222 has an opening portion 221 along the longitudinal direction on the top surface. The inner cover 224 is fitted into the opening 221 from the outside and welded, and has a plurality of sound absorbing holes 223 on the bottom surface. The outer cover 225 is welded to the upper end of the inner cover 224, and abuts against the rib (not shown) of the cylindrical body 222 on the outer side of the inner cover 224 and is welded. The sound absorbing material 226 is sandwiched between the inner cover 224 and the outer cover 225.

However, in the conventional electric vacuum cleaner described above, there is still improvement from the viewpoint of effectively suppressing the noise generated by the air flowing in the hose or the extension pipe and improving the silent performance of the vacuum cleaner. There is room for it.

That is, in the conventional vacuum cleaner described above, since it is a structure in which a sound absorbing material formed by a single density is disposed in a hand tube or an extension tube of a hose, it is sometimes impossible to use a hand tube in a hose. The noise generated by the air flowing inside or in the extension pipe is effectively diffused into the sound absorbing material. Therefore, it is sometimes impossible to effectively mute the noise generated by the air flowing in the hand tube or the extension tube of the hose by the sound absorbing material, and the noise of the electric vacuum cleaner cannot be reduced.

Advanced technical literature Patent literature

[Patent Document 1] Japanese Utility New Case Public Gazette Shi Gongzhao 63-152253 Bulletin

[Patent Document 2] Japanese Patent Laid-Open Publication No. Hei 2-307418

Summary of invention

An electric vacuum cleaner according to the present invention includes: a vacuum cleaner body that is internally provided with an electric blower, and the electric blower generates a suction air that attracts dust on the surface to be cleaned; and the sound absorbing portion is disposed in a suction wind generated by the electric blower A person who attracts the wind to the vacuum cleaner body. The sound absorbing portion is configured such that the cylindrical body has an intake air flow path that constitutes one of the suction air passages and has at least one opening portion, and the cover body is attached to the tubular body and covers the opening. And the sound absorbing member is disposed between the opening and the cover. The sound absorbing member is formed such that the density on the side of the lid body is higher than the density on the side of the opening portion.

Thereby, since the sound absorbing member is formed such that the density on the side of the lid body is higher than the density on the side of the opening portion, it is possible to effectively generate noise by the suction wind flowing through the intake passage formed in the inside of the cylinder. The opening is diffused from the opening to the inside of the sound absorbing member. Therefore, the noise generated by the suction wind flowing inside the cylinder can be effectively silenced by the sound absorbing member, and the mute performance of the electric vacuum cleaner can be improved.

Simple illustration

Fig. 1 is a perspective view showing the entirety of a first embodiment of the electric vacuum cleaner of the present invention.

Fig. 2 is a cross-sectional view showing the entire vacuum cleaner body in the first embodiment of the electric vacuum cleaner of the present invention.

3A is a perspective view of the extension pipe in a state in which the second pipe body is housed inside the first pipe body in the first embodiment of the electric vacuum cleaner of the present invention.

Fig. 3B is a perspective view showing the entire length of the extension pipe in a state in which the first pipe body and the second pipe body are extended in the first embodiment of the electric vacuum cleaner of the present invention.

Fig. 4 is a cross-sectional view showing the entire center portion of the extension pipe shown in Fig. 3B.

Fig. 5 is an exploded perspective view showing the first pipe body in the first embodiment of the electric vacuum cleaner of the present invention.

Fig. 6 is an exploded perspective view showing the second tube body when the second tube body in the first embodiment of the electric vacuum cleaner of the present invention is viewed from above (the arrow mark X direction disclosed in Figs. 3A and 3B).

Fig. 7 is an exploded perspective view showing the second tube body when the second tube body in the first embodiment of the electric vacuum cleaner of the present invention is viewed from above (the arrow symbol Y direction disclosed in Figs. 3A and 3B).

Fig. 8 is a cross-sectional view showing the entire longitudinal center portion of the extension pipe in the second embodiment of the electric vacuum cleaner of the present invention.

Fig. 9 is a perspective view showing the entire hose of the third embodiment of the electric vacuum cleaner of the present invention.

Figure 10 is a central cross-sectional view showing a hose in a third embodiment of the electric vacuum cleaner of the present invention.

Fig. 11 is an exploded perspective view showing the front end tube in the third embodiment of the electric vacuum cleaner of the present invention as seen from above.

Fig. 12 is an exploded perspective view showing the front end tube in the third embodiment of the electric vacuum cleaner of the present invention viewed from below.

Fig. 13A is a side view showing a conventional electric vacuum cleaner.

Figure 13B is a cross-sectional view of a hand held tube of a conventional electric vacuum cleaner.

Figure 13C is an exploded perspective view showing an extension tube of a conventional electric vacuum cleaner.

Form for implementing the invention

Hereinafter, preferred embodiments of the electric vacuum cleaner of the present invention will be described in detail with reference to the drawings. In the following description, the same or corresponding portions are denoted by the same reference numerals, and the description thereof will be omitted.

(Embodiment 1)

Embodiment 1 of the electric vacuum cleaner of the present invention will be described with reference to Figs. 1 to 7 .

Fig. 1 is a perspective view showing the entirety of a first embodiment of the electric vacuum cleaner of the present invention. 2 is a cross-sectional view of the entire vacuum cleaner body in the first embodiment of the electric vacuum cleaner of the present invention. 3A is a perspective view of the extension tube in a state in which the second tube body is accommodated in the first tube body in the first embodiment of the vacuum cleaner according to the first embodiment of the present invention, and FIG. 3B shows the implementation of the electric vacuum cleaner of the present invention. An overall perspective view of the extension tube of the first tube body and the second tube body in the first embodiment in the first embodiment. 4 is a cross-sectional view of the entire center portion of the extension pipe shown in FIG. 3B. Fig. 5 is an exploded perspective view showing the first tube body in the first embodiment of the electric vacuum cleaner of the present invention. In addition, FIG. 6 is an exploded perspective view of the second pipe body when the second pipe body in the first embodiment of the electric vacuum cleaner of the present invention is viewed from above (the arrow mark X direction disclosed in FIGS. 3A and 3B). In addition, FIG. 7 is an exploded perspective view of the second pipe body when the second pipe body in the first embodiment of the electric vacuum cleaner of the present invention is viewed from above (the direction of the arrow Y in FIG. 3A and FIG. 3B).

As shown in FIG. 1 , the electric vacuum cleaner 100 is provided with a cleaner body 1 and dust collecting. Device 2, inhalation member 3, hose 4 and extension tube 5. The cleaner body 1 is internally provided with an electric blower (not shown) that generates a wind. The dust collecting device 2 is connected to the cleaner body 1 so as to be detachable. The suction member 3 attracts dust on the surface to be cleaned. One end of the hose 4 is connected to the suction port 1a which is already provided in the front portion of the cleaner body 1, so that it can be detachably attached. One end of the extension tube 5 is connected to the other end of the hose 4 so as to be detachable, and the other end is connected to the suction member 3 so as to be detachable and freely extendable or freely coupled.

In the suction tool 3, a rotating brush (not shown) is provided to close the dust on the surface to be cleaned, and a motor (not shown) is used to rotationally drive the rotating brush (not shown). Further, a distal end tube 7 is provided at an end portion of the hose 4 on the side of the extension tube 5, and the distal end tube 7 is provided with a handle portion 6 held by a user during dust collection. Through the front end pipe 7, the hose 4 and the extension pipe 5 are connected so as to be detachable. Further, a connecting pipe 8 is provided at an end portion of the hose 4 on the side of the cleaner body 1. Through the connecting pipe 8, the suction port 1a of the cleaner body 1 is connected to the hose 4 so as to be detachable.

As shown in FIGS. 1 and 2, an electric blower chamber 10 is disposed behind the cleaner body 1, and the electric blower chamber 10 houses an electric blower 9 that generates suction air. Moreover, the dust collecting device mounting portion 11 is disposed in front of the cleaner body 1. Separation and collection of the dust collecting device 2, which has been sucked by the wind, is attached to the dust collecting device mounting portion 11 so as to be detachable, and the suction air is generated by the electric blower 9. Further, a pair of wheels 12 for traveling are disposed on both sides of the rear side of the cleaner body 1, and the wheels 12 are attached to the cleaner body 1 so as to be freely rotatable. Further, before the bottom surface of the cleaner body 1, the traveling casters 13 are arranged to be freely rotatable. Furthermore, in the upper part of the cleaner body 1, when the user carries the vacuum cleaner body 1 The body handle 14 is held.

As shown in Fig. 2, the dust collecting device 2 includes a dust collecting device body 15, a primary filter 16, an umbrella-like projecting portion 17, a secondary filter 18, an upper cover 19, a lower cover 20, and a dust collecting device handle. twenty one. The dust collector main body 15 is formed in a substantially cylindrical shape having openings (not shown) at both ends. The primary filter 16 is disposed inside the dust collecting device body 15 so as to be concentric with the dust collecting device body 15. The extension 17 is attached to the lower end of the primary filter 16. The secondary filter 18 is disposed above the primary filter 16. The upper cover 19 covers an opening (not shown) at the upper end of the dust collector main body 15 and an upper surface of the secondary filter 18. The lower cover body 20 is rotatably supported by the dust collecting device body 15 and covers an opening (not shown) at the lower end of the dust collecting device body 15 and is freely switchable. The dust collecting device handle 21 is rotatably supported by the upper cover body 19. Further, a dust removing portion 22 is disposed between the secondary filter 18 and the upper lid body 19, and the dust removing portion 22 removes dust that has adhered to the secondary filter 18. Further, a driving portion 23 is built in the inside of the upper cover 19, and the driving portion 23 drives the dust removing portion 22.

As shown in FIG. 3A, FIG. 3B and FIG. 4, the extension tube 5 as the sound absorbing portion is configured such that the first tube body 24 is connected to the front end tube 7 of the hose 4 so as to be freely detachable; The second tube body 25 is connected to the other end of the first tube body 24 so as to be slidable, and the other end is connected to the suction member 3 so as to be freely detachable.

As shown in FIG. 3A to FIG. 5, the first tubular body 24 is composed of a first tubular body 27, an upper cover 28 attached to the upper portion of the first tubular body 27, and a lower casing 29. It is attached to the lower part of the first cylinder 27. One end of the first cylinder 27 is connected to the front end pipe 7 of the hose 4 so as to be detachable, and the second pipe body 25 is detachably attached. The other end is inserted into the other end and is slidable, and has a first suction flow path 26 through which the suction air generated by the electric blower 9 flows. Further, the upper cover body 28 and the lower cover body 29 are formed such that the length in the longitudinal direction is substantially the same as the length in the longitudinal direction of the first tubular body 27.

A sliding operation portion 30 is provided on an upper portion of the end portion of the first tubular body 27 on the second tubular body 25 side, and the sliding operation portion 30 releases and restricts the sliding operation of the first tubular body 24 and the second tubular body 25. Further, an engagement protrusion portion 30a is provided on a lower portion of the end portion of the first tubular body 27 on the second tube body 25 side, and the engagement projection portion 30a operates in conjunction with the operation of the slide operation portion 30.

Here, in the present embodiment, the upper portion of the first tubular body 27 is the upper portion of the first cylindrical body 27 in the radial direction, and is the arrow symbol X side shown in FIGS. 3A to 7 . Further, the lower portion of the first tubular body 27 is a lower portion in the radial direction of the first tubular body 27, and is on the side of the arrow mark Y shown in FIGS. 3A to 7 .

The upper cover body 28 is configured such that the first cover body 28a covers the upper surface of the first tubular body 27, and the second cover body 28b covers the upper surface of the slide operation portion 30. The through hole portion 28c is provided in the second cover body 28b, and the through hole portion 28c is used to attach the slide operation portion 30 to the first tube body 24 in a state where the second cover body 28b is attached to the first tube body 27. Highlighted above. Further, the first cover 28a, the second cover 28b, and the lower cover 29 are provided with fitting claws (not shown), and the fitting claws (not shown) are provided in the first cylinder A plurality of fitting recesses (not shown) of 27 are fitted. The fitting claws (not shown) provided in the first cover 28a, the second cover 28b, and the lower cover 29 are fitted into the fitting recesses (not shown) provided in the first cylindrical body 27 The first cover 28a, the second cover 28b, and the lower cover 29 are attached to the first tubular body 27.

The first cover 28a and the first cylindrical body 27 are attached to form a space portion 31 between the first cover 28a and the first cylindrical body 27. Further, an insertion port 32 is provided below the slide operation unit 30, that is, between the slide operation unit 30 and the first cylindrical body 27, and the insertion port 32 is inserted into the slide support portion 37 which is already provided in the second tube body 25 which will be described later. . The slide support portion 37, which will be described later, inserted into the insertion port 32 is housed in the space portion 31 formed between the first tubular body 27 and the first cover 28a and is slidable. Further, a lead wire (not shown) is disposed inside the space portion 31 and the slide support portion 37, which will be described later, and the lead wire (not shown) is supplied to the cleaner body 1 through the hose 4 and the extension pipe 5. A commercial power source (not shown) is supplied to the suction member 3.

As shown in FIGS. 3A, 3B, 4, 6, and 7, the second tubular body 25 is inserted into the first tubular body 27 of the first tubular body 24 at one end and is slidable, and the suction member 3 is attached to the other. One end is connected to be freely attachable and detachable. Further, the second tubular body 25 is configured such that the second tubular body 34 has a second intake air flow path 33 that communicates with the first intake air flow path 26 therein, and the outer cover 35 It is attached to the lower part of the second cylinder 34 and serves as a cover.

A loading/unloading operation portion 36 is provided on an upper portion of the end portion of the second cylindrical body 34 on the suction member 3 side, and the second loading and detaching operation portion 36 attaches and detaches the second tubular body 25 and the suction member 3. Further, a sliding support portion 37 is provided on the upper end portion of the second cylindrical body 34 on the suction member 3 side, and the sliding support portion 37 is attached to the rear surface of the operation portion 36, that is, the first tubular body of the attachment and detachment operation portion 36. The end of the 24 side is extended toward the side of the first pipe body 24. The slide support portion 37 is formed to have substantially the same length as the length of the end portion of the second tubular body 34 from the detachment operation portion 36 to the end portion of the second tubular body 34 on the first tubular body 24 side. Moreover, the end portion of the second tubular body 25 on the first tubular body 24 side of the second tubular body 25 is inserted into the first tubular body 27 and is slidable. Moreover, the sliding support portion 37 The end portion on the first tube body 24 side is inserted into the space portion 31 through the insertion port 32 of the first tube body 24 and is slidable. Thereby, the second pipe body 25 is connected to the first pipe body 24 so as to be slidable. Further, a cavity portion 38 is formed inside the slide support portion 37, and a lead wire (not shown) is disposed inside the cavity portion 38. The wire (not shown) is transmitted through the hose 4 and the extension tube 5, and is already A commercial power source (not shown) supplied to the cleaner body 1 is supplied to the suction tool 3.

Here, in the present embodiment, the upper portion of the second cylindrical body 34 is an upper portion in the radial direction of the second cylindrical body 34, and is on the side of the arrow mark X shown in FIGS. 3A to 7 . Further, the lower portion of the second cylindrical body 34 is a lower portion in the radial direction of the second cylindrical body 34, and is on the side of the arrow mark Y shown in FIGS. 3A to 7 .

The opening portion 39 that communicates with the second suction flow path 33 that has been formed inside the second cylindrical body 34 is formed along the longitudinal direction of the second cylindrical body 34 in the lower portion of the second cylindrical body 34. In order to cover the opening portion 39, the outer cover 35 is attached to the lower portion of the second cylindrical body 34. Moreover, the inner cover 41 is disposed in the opening 39, and the inner cover 41 covers the opening 39 and has a plurality of communication ports 40 communicating with the second intake air flow path 33. Further, a sound absorbing member 42 is disposed between the opening portion 39 and the outer cover 35, that is, between the inner lid 41 and the outer lid 35. The sound absorbing member 42 absorbs noise generated when the suction air generated by the electric blower 9 flows in the second intake air flow path 33.

On the outer surface of the outer cover 35, that is, the surface on the side of the arrow mark Y shown in Figs. 3A to 7 of the outer cover 35, the engagement recess 35a is provided at a constant interval along the longitudinal direction of the outer cover 35. The engagement recessed portion 35a is engaged with the engagement projection portion 30a that is provided on the lower portion of the end portion of the first tubular body 24 on the second tubular body 25 side. The first tubular body 24 and the second tubular body 25 are formed by the engaging projections 30a and the second tubular body of the first tubular body 27 The engaging recessed portion 35a of the 34 is engaged, and the sliding of the first tubular body 24 and the second tubular body 25 is restricted. Further, the user can operate the slide operation unit 30 to release the engagement protrusion 30a of the first tubular body 27 and the engagement recessed portion 35a of the second cylindrical body 34, thereby making the first tubular body 24 and the second tubular body 24 The tubular body 25 slides. Further, the first pipe body 24 and the second pipe body 25 can be engaged with the slide operation portion 30 by the user, and the engagement between the engagement projection portion 30a and the engagement recess portion 35a can be released, and the second pipe body 25 can be disposed at the same time. The engagement recessed portion 35a of any one of the plurality of engagement recesses 35a of the outer cover 35 engages with the engagement projection 30a to adjust the length of the second tubular body 25 that comes in and out of the first tubular body 24. Thereby, the length of the extension pipe 5 can be made into an arbitrary length.

The inner surface of the outer cover 35, that is, the surface of the outer cover 35 on the side of the arrow mark X shown in Figs. 3A to 7 is formed as a rib portion 43 extending from the inner surface of the outer cover 35 toward the inner cover 41 side. The rib portion 43 is formed so as to surround the entire circumference of the opening portion 39 at a position where the outer lid 35 and the opening portion 39 face each other. Moreover, in a state in which the outer cover 35 is attached to the second cylindrical body 34, it is formed in contact with the lower surface of the second cylindrical body 34. Further, the inner lid 41 is configured such that the inner surface of the inner lid 41, that is, the surface of the inner lid 41 on the side of the arrow mark X shown in Figs. 3A to 7 and the second surface are attached to the second cylindrical body 34. The inner faces of the cylinders 34 will constitute the same face.

The sound absorbing member 42 is disposed inside a space (not shown) formed by the outer cover 35, the ribs 43, and the inner lid 41. The sound absorbing member 42 is formed such that the length of the long direction is substantially the same as the length of the long direction of the opening 39, and the length of the short direction is substantially the same as the length of the short direction of the opening 39. Further, the sound absorbing member 42 is formed by laminating a plurality of sound absorbing materials (not shown) so that the density on the side of the outer cover 35 is higher than the density on the side of the inner lid 41.

Here, in the present embodiment, the density of the sound absorbing member 42 on the outer cover 35 side and the density of the sound absorbing member 42 on the inner cover 41 side are set to 1 cm in the thickness of the sound absorbing member 42, and the area of the sound absorbing member 42 is made 1 m. ^{At 2} o'clock, the number of grams of the sound absorbing material (not shown) included in the outer cover 35 side and the inner cover 41 side of the sound absorbing member 42.

In general, in a state where the hose 4, the extension tube 5, and the suction member 3 are connected to the cleaner body 1, when the user starts the operation of the vacuum cleaner 100 and the suction blows by the electric blower 9, the cleaning surface is cleaned. The dust flows into the cleaner body 1 from the suction port 1a through a suction air passage (not shown) formed by the suction member 3, the extension pipe 5, and the hose 4. At this time, in the suction air passage (not shown) until the suction air generated by the electric blower 9 reaches the cleaner body 1 from the suction body 3, the inner wall of the extension pipe 5, the suction member 3 and the extension pipe 5 are extended. The connection portion (not shown) and the connection portion (not shown) between the extension tube 5 and the hose 4 and the suction wind may generate noise in a high frequency region including 1 kHz or more. In particular, sounds in the high frequency range of 1 kHz to 4 kHz sometimes give the user an unpleasant feeling.

Therefore, in order to sufficiently prevent the user from feeling unpleasant due to the noise in the high-frequency range of 1 kHz or more generated by the suction air passage, it is necessary to reduce the noise in the high-frequency range including 1 kHz or more generated by the suction air passage. noise. In particular, in noises including high frequency fields of 1 kHz or more, it is necessary to reduce the sound in the high frequency range of 1 kHz to 4 kHz.

Therefore, the sound absorbing member 42 can be formed such that the density of the sound absorbing member 42 on the outer cover 35 side is higher than that of the inner cover 41 side. When the sound of the sound absorbing member 42 on the side of the cover 35 is D1 and the density of the inner cover 41 is D2, the sound absorbing member 42 is covered 35. The density D1 of the side and the density D2 of the inner lid 41 side of the sound absorbing member 42 preferably satisfy the conditions (1) and (2).

Condition (1) 200 ≦ D1 ≦ 800

Condition (2) 0.1 × D1 ≦ D2 ≦ 0.9 × D1

Hereinafter, the relationship between the density D1 on the outer cover 35 side of the sound absorbing member 42 and the density D2 on the inner cover 41 side of the sound absorbing member 42 will be described using Table 1.

The extension tube 5 used in the experiment was formed by ABS resin. Moreover, the cross-sectional area of the second suction flow path 33 formed in the second cylindrical body 34 in the radial direction is 900 mm ² , the length of the long length of the second cylindrical body 34 is 440 mm, and the second cylindrical body is formed. The flow of the attractive air flowing inside 34 was made 2.5 m ³ /min. Further, 382 communication ports 40 having a diameter of 2.2 mm are formed in the inner cover 41.

The noise is determined by comparing the following noise, that is, when the flow rate is 2.5 m ³ /min, and the air is caused to flow into the second cylinder 34 without the opening 39 and the sound absorbing member 42. And when the flow rate is 2.5 m ³ /min and the air flows into the inside of the second cylindrical body 34 in which the sound absorbing member 42 is provided, it is generated in the second cylindrical body 34. When the sound of the high frequency range of 1 kHz or more is reduced by 30% or more by the sound absorbing member 42, and ○ can be sufficiently used as a product, the sound of the high frequency range of 1 kHz or more can be reduced by the sound absorbing member 42. When it is less than 30%, it can be used as a product, and Δ can be used, and the sound in the high-frequency range of 1 kHz or more can be reduced by less than 10% by the sound absorbing member 42 and can not be used as a product.

As shown in Table 1, the density D1 on the outer cover 35 side of the sound absorbing member 42 is made 100 g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is 0.1 times the density D1 on the outer cover 35 side of the sound absorbing member 42. When the value is changed to 1.1 times, the sound in the high frequency range of 1 kHz or more cannot be sufficiently reduced in all the densities of the density D2 on the inner lid 41 side of the sound absorbing member 42. This is considered to be because the density D1 on the side of the cover 35 on the sound absorbing member 42 is too low. Therefore, the noise from the plurality of communication ports 40 intruding into the sound absorbing member 42 cannot be silenced by the outer cover 35 side of the sound absorbing member 42.

Further, the density D1 of the sound absorbing member 42 on the outer cover 35 side is set to 1000 g, and the density D2 of the inner cover 41 side of the sound absorbing member 42 is changed from 0.1 times to 0.9 times the density D1 of the outer cover 35 side of the sound absorbing member 42. At all the densities of the density D2 on the inner cover 41 side of the sound absorbing member 42, the sound in the high frequency range of 1 kHz or more cannot be sufficiently reduced. It is considered that the density D1 on the side of the cover 35 is excessively high due to the sound absorbing member 42, and therefore, the self-sounding member 42 cannot be effectively made. The side of the inner lid 41 is diffused toward the outer cover 35 side of the sound absorbing member 42, and cannot be silenced by the outer cover 35 side of the sound absorbing member 42. Further, when the density D1 of the sound absorbing member 42 on the outer cover 35 side is 1000 g, and the density D2 of the sound absorbing member 42 on the inner cover 41 side is 1.0 times and 1.1 times the density D1 of the sound absorbing member 42 on the outer cover 35 side. It is also impossible to sufficiently reduce the sound of the high frequency field above 1 kHz. It is considered that since the density D2 on the inner cover 41 side of the sound absorbing member 42 is too high, the noise intruding into the sound absorbing member 42 from the plurality of communication ports 40 is sound-insulated by the inner cover 41 side of the sound absorbing member 42, and cannot be effectively It is diffused to the inside of the sound absorbing member 42.

Further, the density D1 on the outer cover 35 side of the sound absorbing member 42 is made 200 g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is changed from 0.1 times the density D1 on the outer cover 35 side of the sound absorbing member 42 to 0.9. In the case of multiple times, in the density D2 of the inner cover 41 side of the sound absorbing member 42, the sound in the high frequency range of 1 kHz or more can be reduced, and in particular, the sound in the high frequency range near 4 kHz can be reduced. However, when the density D1 on the outer cover 35 side of the sound absorbing member 42 is 200 g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is 1.0 times and 1.1 times the density D1 on the outer cover 35 side of the sound absorbing member 42. It is impossible to sufficiently reduce the sound of the high frequency field above 1 kHz. It is considered that the sound absorbing member 42 has a characteristic that the lower the density of the sound absorbing member 42, the sound in the high frequency region is easily absorbed in the high frequency region of 1 kHz or higher, and the sound absorbing by the sound absorbing member 42 is possible. The frequency field is narrowed, and the density of the sound absorbing member 42 is higher. In the high frequency region of 1 kHz or higher, it is easy to widely absorb sound in the low frequency range to the high frequency range, and at the same time, the frequency of sound sounded by the sound absorbing member 42 The field will be wider. That is, outside the sound absorbing member 42 When the density D1 on the side of the cover 35 is 200 g and the density D2 on the inner cover 41 side of the sound absorbing member 42 is changed from 0.1 times to 0.9 times the density D1 of the outer cover 35 side of the sound absorbing member 42, the self-complex communication port 40 is generally considered. The noise that intrudes into the sound in the high-frequency range of 1 kHz or more in the sound absorbing member 42 is effectively diffused from the inner lid 41 side of the sound absorbing member 42 toward the outer cover 35 side of the sound absorbing member 42, and is in the sound of the high frequency region of 1 kHz or higher. The sound in the frequency domain higher than 4 kHz is sound-absorbing by the inner cover 41 side of the sound absorbing member 42, and in the sound of the high frequency region of 1 kHz or higher, the sound in the frequency domain near 4 kHz is covered by the sound absorbing member 42 35 side sound absorption. Moreover, when the density D1 of the sound absorbing member 42 on the outer cover 35 side is 200 g, and the density D2 of the sound absorbing member 42 on the inner cover 41 side is 1.0 times and 1.1 times the density D1 of the sound absorbing member 42 on the outer cover 35 side. In the noise in which the sound of the high frequency region of 1 kHz or more is intruded into the sound absorbing member 42 from the plurality of communication ports 40, sound in the frequency domain near 4 kHz is sound-absorbing, and therefore it is generally considered that the high frequency of 1 kHz or more cannot be sufficiently reduced. The voice of the field.

Further, the density D1 on the outer cover 35 side of the sound absorbing member 42 is set to 400 g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is changed from 0.1 times to 0.9 times the density D1 on the outer cover 35 side of the sound absorbing member 42. At all the densities of the density D2 on the inner cover 41 side of the sound absorbing member 42, the sound in the high frequency range of 1 kHz or more can be reduced. In particular, it is possible to sufficiently reduce the sound of the high frequency field of 1 kHz to 4 kHz which is easy to give the user an unpleasant feeling. However, when the density D1 on the outer cover 35 side of the sound absorbing member 42 is 400 g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is 1.0 times and 1.1 times the density D1 on the outer cover 35 side of the sound absorbing member 42. It is impossible to sufficiently reduce the sound of the high frequency field above 1 kHz. One It is considered that, according to the characteristics of the sound absorbing member 42, the density D1 on the outer cover 35 side of the sound absorbing member 42 is made 400g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is made from the sound absorbing member 42. When the density D1 of the side is changed by 0.1 times to 0.9 times, the noise that intrudes into the sound absorbing member 42 from the sound of the high frequency region of 1 kHz or more from the plurality of communication ports 40 is effective from the inner cover 41 side of the sound absorbing member 42 toward the sound absorbing member 42. The outer cover 35 is diffused on the side, and in the sound of the high frequency region of 1 kHz or higher, the sound in the frequency region higher than 4 kHz is sound-absorbing by the inner cover 41 side of the sound absorbing member 42, and at the same time in the high frequency region of 1 kHz or higher. In the high frequency range of 1 kHz to 4 kHz, which is easy to give the user an unpleasant feeling, the sound is absorbed by the outer cover 35 side of the sound absorbing member 42. Further, when the density D1 of the sound absorbing member 42 on the outer cover 35 side is 400 g, and the density D2 of the inner cover 41 side of the sound absorbing member 42 is 1.0 times and 1.1 times the density D1 of the sound absorbing member 42 on the outer cover 35 side. In the noise in which the sound in the high-frequency range of 1 kHz or higher is included in the sound absorbing member 42 from the plurality of communication ports 40, the sound in the frequency domain of the sound in the high frequency range of only 1 kHz to 4 kHz is sound-absorbing, and therefore it is generally considered that the sound is insufficient. Reduce the sound of the high frequency field above 1 kHz. Further, when the density D1 on the outer cover 35 side of the sound absorbing member 42 is 400 g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is 0.9 times the density D1 on the outer cover 35 side of the sound absorbing member 42, the sound absorbing member The density D1 on the side of the outer cover 35 and the density D2 on the inner cover 41 side of the sound absorbing member 42 are substantially the same density, and the density D1 on the outer cover 35 side of the sound absorbing member 42 and the inner cover 41 side of the sound absorbing member 42. Since the difference in density D2 is reduced, the frequency of the sound absorbing sound by the outer cover 35 side of the sound absorbing member 42 and the inner cover 41 side of the sound absorbing member 42 is substantially the same. Therefore, the density D1 on the side of the cover 35 of the sound absorbing member 42 is When 400 g is formed and the density D2 on the inner lid 41 side of the sound absorbing member 42 is 0.9 times the density D1 on the outer cover 35 side of the sound absorbing member 42, the density D1 of the cover 35 side of the sound absorbing member 42 is 0.1. When the frequency is higher than 0.8 times, the sound in the frequency domain higher than 4 kHz is not easily absorbed by the inner cover 41 side of the sound absorbing member 42, and it is generally considered that the sound in the high frequency range of 1 kHz or more cannot be sufficiently reduced.

Further, the density D1 on the outer cover 35 side of the sound absorbing member 42 is set to 600 g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is changed from 0.1 times the density D1 of the outer cover 35 side of the sound absorbing member 42 to 0.9. In all the densities of the density D2 on the inner cover 41 side of the sound absorbing member 42, the sound in the high frequency range of 1 kHz or more can be reduced, and in particular, the 1 kHz to 4 kHz which is easy to give the user an unpleasant feeling can be sufficiently reduced. The sound of the high frequency field. However, when the density D1 on the outer cover 35 side of the sound absorbing member 42 is 600 g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is 1.0 times and 1.1 times the density D1 on the outer cover 35 side of the sound absorbing member 42. It is impossible to sufficiently reduce the sound of the high frequency field above 1 kHz. It is considered that, according to the characteristics of the sound absorbing member 42, the density D1 on the outer cover 35 side of the sound absorbing member 42 is made 600g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is made from the sound absorbing member 42. When the density D1 of the side is changed to 0.9 times, the noise that intrudes into the sound absorbing member 42 from the sound of the high frequency region of 1 kHz or more in the sound absorbing member 42 is effective from the inner cover 41 side of the sound absorbing member 42 toward the sound absorbing member. 42 The outer cover 35 is diffused on the side, and in the sound of the high frequency region of 1 kHz or higher, the sound in the frequency domain higher than 4 kHz is sound-absorbing by the inner cover 41 side of the sound absorbing member 42, and at the same time in the high frequency region of 1 kHz or higher. In the sound, the sound of the high frequency range of 1 kHz to 4 kHz, which is easy to give the user an unpleasant feeling, is sound absorbing by the cover 35 side of the sound absorbing member 42. The reason. Moreover, when the density D1 of the sound absorbing member 42 on the outer cover 35 side is 600 g, and the density D2 of the sound absorbing member 42 on the inner cover 41 side is 1.0 times and 1.1 times the density D1 of the sound absorbing member 42 on the outer cover 35 side. Since the density D2 on the inner cover 41 side of the sound absorbing member 42 is too high, it is generally considered that the inner cover 41 side of the sound absorbing member 42 cannot be effectively diffused toward the outer cover 35 side of the sound absorbing member 42, and sound absorption cannot be performed. The member 42 infiltrates the noise from the complex communication port 40 into the sound absorbing member 42 including the sound of the high frequency region of 1 kHz or more. Further, when the density D1 on the outer cover 35 side of the sound absorbing member 42 is 600 g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is 0.9 times the density D1 on the outer cover 35 side of the sound absorbing member 42, When the density D1 of the inner cover 41 side of the sound absorbing member 42 is increased by 0.1 to 0.8 times the density D1 of the sound absorbing member 42 on the outer cover 35 side, it is generally considered that the plurality of communication ports 40 are invaded into the sound absorbing member 42. The noise of the sound in the high frequency range of 1 kHz or more is less likely to diffuse into the inside of the sound absorbing member 42, and is not easily silenced by the sound absorbing member 42.

Further, the density D1 on the outer cover 35 side of the sound absorbing member 42 is set to 800 g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is changed from 0.1 times the density D1 of the outer cover 35 side of the sound absorbing member 42 to 0.9. In all the densities of the density D2 on the inner cover 41 side of the sound absorbing member 42, the sound in the high frequency range of 1 kHz or more can be reduced, and in particular, the 1 kHz to 4 kHz which is easy to give the user an unpleasant feeling can be sufficiently reduced. The sound of the high frequency field. However, when the density D1 on the outer cover 35 side of the sound absorbing member 42 is 800 g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is 1.0 times and 1.1 times the density D1 on the outer cover 35 side of the sound absorbing member 42. It is impossible to sufficiently reduce the sound of the high frequency field above 1 kHz. It is generally believed that this is due to the characteristics of the sound absorbing member 42 described above. The density D1 of the sound absorbing member 42 on the outer cover 35 side is set to 800 g, and the density D2 of the inner cover 41 side of the sound absorbing member 42 is changed from 0.1 times to 0.9 times the density D1 of the outer cover 35 side of the sound absorbing member 42. The noise that the communication port 40 intrudes into the sound-absorbing member 42 including the sound in the high-frequency range of 1 kHz or more is effectively diffused from the inner cover 41 side of the sound absorbing member 42 toward the outer cover 35 side of the sound absorbing member 42, and is in the high frequency range of 1 kHz or more. Among the sounds, the sound in the frequency domain higher than 4 kHz is sound-absorbing by the inner cover 41 side of the sound absorbing member 42, and at the same time, in the sound of the high frequency region of 1 kHz or more, it is easy to give the user an unpleasant 1 kHz to 4 kHz. The sound in the high frequency range is sound absorbing by the outer cover 35 side of the sound absorbing member 42. Moreover, when the density D1 of the sound absorbing member 42 on the outer cover 35 side is 800 g, and the density D2 of the sound absorbing member 42 on the inner cover 41 side is 1.0 times and 1.1 times the density D1 of the sound absorbing member 42 on the outer cover 35 side. Since the density D2 on the inner cover 41 side of the sound absorbing member 42 is too high, it is generally considered that the inner cover 41 side of the sound absorbing member 42 cannot be effectively diffused toward the outer cover 35 side of the sound absorbing member 42, and sound absorption cannot be performed. The member 42 infiltrates the noise from the complex communication port 40 into the sound absorbing member 42 including the sound of the high frequency region of 1 kHz or more. Further, when the density D1 on the outer cover 35 side of the sound absorbing member 42 is 800 g, and the density D2 on the inner cover 41 side of the sound absorbing member 42 is 0.7 to 0.9 times the density D1 on the outer cover 35 side of the sound absorbing member 42. When the density D2 of the inner cover 41 side of the sound absorbing member 42 is increased as compared with the case where the density D1 of the sound absorbing member 42 is set to be 0.1 to 0.6 times the outer surface of the sound absorbing member 42, it is considered that the sound absorbing member is invaded from the plurality of communication ports 40. The noise of the sound including the high frequency region of 1 kHz or more in 42 is less likely to diffuse into the inside of the sound absorbing member 42, and is not easily silenced by the sound absorbing member 42.

According to the foregoing, in order to sufficiently prevent the package generated by the attraction air path The noise in the high frequency range of 1 kHz or more is unpleasant to the user, and the density D1 on the outer cover 35 side of the sound absorbing member 42 and the density D2 on the inner cover 41 side of the sound absorbing member 42 should satisfy the condition (1) and the condition. (2). Further, in order to more sufficiently prevent the user from being disturbed by the noise in the high frequency range of 1 kHz or more due to the suction air passage, the density D1 of the sound absorbing member 42 on the outer cover 35 side and the sound absorbing member 42 are provided. The density D2 on the side of the inner lid 41 should satisfy the condition (3) and the condition (4).

Condition (3) 400 ≦ D1 ≦ 800

Condition (4) 0.1 × D1 ≦ D2 ≦ 0.6 × D1

The operation and action of the electric vacuum cleaner configured as described above will be described below.

When the hose 4, the extension tube 5, and the suction tool 3 are connected to the cleaner body 1, when the user starts the operation of the vacuum cleaner 100, the suction blows by the electric blower 9 generate an attractive force. In this state, when the user moves the suction tool 3 on the surface to be cleaned, the dust on the surface to be cleaned is sucked from the suction tool 3 together with the air. The air sucked from the suction member 3 containing dust passes through a suction air passage (not shown) formed by the suction tool 3, the extension pipe 5, and the hose 4, and flows into the cleaner body 1 from the suction port 1a. The dust-containing air that flows into the cleaner body 1 flows into the interior of the dust collecting device 2.

At this time, in the suction air passage (not shown) until the suction air generated by the electric blower 9 reaches the cleaner body 1 from the suction body 3, the inner wall of the extension pipe 5, the suction member 3 and the extension pipe 5 are extended. The connection between the connecting portion (not shown) and the connecting portion (not shown) of the extension tube 5 and the hose 4 and the suction wind may cause noise in a high frequency region including 1 kHz or more, and may be used. It brings a sense of dissatisfaction.

In the present embodiment, the sound absorbing member 42 is formed as the sound absorbing member 42. The density gradually increases from the side of the inner lid 41 toward the side of the outer lid 35, so that the density of the outer cover 35 side of the sound absorbing member 42 is higher than the density of the inner lid 41 side of the sound absorbing member 42. Therefore, the noise that has been intruded into the sound absorbing member 42 by the plurality of communication ports 40 provided in the inner cover 41 is diffused in the sound absorbing member 42 having a low density on the inner cover 41 side, and the sound pressure is attenuated. The noise that is silenced in the sound absorbing member 42 having a low density on the inner cover 41 side advances in the sound absorbing member 42 from the inner cover 41 side toward the outer cover 35 side, and the sound pressure is attenuated by the sound absorbing member 42. Further, the noise that has reached the side of the outer cover 35 is diffused in the sound absorbing member 42 having a high density on the side of the outer cover 35, and the sound pressure is attenuated and silenced. Thereby, the noise generated in the second suction flow path 33 of the second pipe body 25 constituting one of the suction air passages (not shown) can be effectively diffused into the sound absorbing member 42 while being sound absorbing. Member 42 effectively mutes. Therefore, the mute performance of the vacuum cleaner 100 can be improved, and the user can be sufficiently prevented from being unpleasant by the noise generated by the suction air passage (not shown). Further, in the above-described structure, in particular, the sound absorbing effect in the high frequency region of 1 kHz or more included in the following noise is remarkable, that is, the second tube body 25 of the extension tube 5 constituting one of the suction air passages (not shown). Produced within.

Further, in the present embodiment, a structure in which a plurality of sound absorbing materials (not shown) are stacked and the sound absorbing member 42 is formed so that the density on the side of the outer cover 35 is higher than the density on the side of the inner lid 41 is described. However, the sound absorbing member 42 is formed. The density of the side of the outer cover 35 is higher than the density of the inner cover 41. For example, the sound absorbing member 42 may be formed such that the density of the sound absorbing member 42 on the side of the outer lid 35 is higher than the density of the inner lid 41 by a permeable sound absorbing material (not shown). Further, when the sound absorbing member 42 is configured by a sound absorbing material (not shown) having a different complex density, only a plurality of sound absorbing materials (not shown) may be stacked. A plurality of sound absorbing materials (not shown) may be integrally formed with each other by a backing material or heat welding or the like. Further, when the sound absorbing member 42 is formed by at least three sound absorbing materials (not shown) having different densities, the density may be gradually increased from the side of the inner lid 41 toward the outer lid 35 side, and may be gradually increased. The density between the inner cover 41 side and the outer cover 35 side of the sound absorbing member 42 is higher than the density of the inner cover 41 side of the sound absorbing member 42.

In the present embodiment, the structure in which the sound absorbing member 42 is disposed in the second tubular body 34 of the second tubular body 25 will be described. However, the sound absorbing member 42 may be disposed in the first tubular body 27 of the first tubular body 24, Further, it may be disposed in both the first cylinder 27 and the second cylinder 34. Thereby, since the noise generated by the suction wind flowing in the first pipe body 24 and the second pipe body 25 can be effectively silenced by the sound absorbing member 42, the sound absorbing member 42 can be used by the sound absorbing member 42. The noise generated in the extension tube 5 constituting one of the suction air passages (not shown) is effectively silenced. Thereby, the silent performance of the vacuum cleaner 100 can be further improved, and the user can be more sufficiently prevented from being unpleasant by the noise generated by the suction air passage (not shown).

In the present embodiment, a configuration is described in which an opening portion 39 is provided in the lower portion of the second cylindrical body 34 to communicate with the second intake air flow path 33, and the inner cover 41 covers the opening portion. 39, the plurality of communication ports 40 communicating with the second suction flow path 33; and the outer cover 35 covering the opening 39 and the inner cover 41; and being disposed between the outer cover 35 and the inner cover 41 There is a sound absorbing member 42. However, a configuration may be adopted in which a plurality of communication ports 40 communicating with the second intake air flow path 33 are directly formed on the lower portion of the second cylindrical body 34, and the outer cover 35 is disposed to cover the communication port 40, and at the same time The industry has been formed directly on the second cylinder 34 The sound absorbing member 42 is disposed between the plurality of communication ports 40 and the outer cover 35. Thereby, the number of parts of the extension pipe 5 can be reduced, and the assembly property of the extension pipe 5 can be improved.

Further, in the present embodiment, the opening portion 39 that communicates with the second intake air flow path 33 that has been formed inside the second cylindrical body 34 along the lower portion of the second cylindrical body 34 will be described. One of the second cylindrical bodies 34 is provided in the longitudinal direction, and the inner cover 41 is disposed in the opening 39. However, the opening 39 is provided so as to be formed in the second suction flow formed inside the second cylindrical body 34. The road 33 can be connected. For example, the opening 39 may be provided in plural along the longitudinal direction of the second cylinder 34. Further, when a plurality of openings 39 are provided along the longitudinal direction of the second cylindrical body 34, the outer cover 35 may be formed separately for the plurality of openings 39, or may be formed to cover the entirety of the plurality of openings 39.

In the present embodiment, the structure in which the sound absorbing member 42 is disposed in the lower portion of the second cylindrical body 34 will be described. However, the opening 39, the inner cover 41, and the outer cover 35 may be provided in the following configuration. In the upper portion of the second cylindrical body 34, the sound absorbing member 42 is disposed between the outer lid 35 and the inner lid 41, and the sound absorbing member 42 is disposed above the second tubular body 34.

In general, when the user uses the vacuum cleaner 100, the suction air flowing in the extension pipe 5 flows along the upper surfaces of the first cylinder 27 and the second cylinder 34. Therefore, when the sound absorbing member 42 is disposed in the upper portion of the second cylindrical body 34, the noise generated inside the second cylindrical body 34 can be effectively silenced by the sound absorbing member 42, and sound absorbing can be performed. The member 42 effectively mutes the noise generated in the extension tube 5. Therefore, the mute performance of the vacuum cleaner 100 can be improved, and the user can be sufficiently prevented from being unpleasant by the noise generated by the suction air passage (not shown).

However, in general, the suction wind generated by the electric blower 9 contains moisture such as moisture in the air, and the dust on the cleaning surface contains moisture such as moisture in the air. When the moisture contained in the suction wind and the dust is absorbed by the sound absorbing member 42, the moisture absorbed by the sound absorbing member 42 is prevented from being generated in the second suction flow path 33 which has been formed inside the second cylindrical body 34. The noise is diffused into the sound absorbing member 42 and the noise generated by the suction wind flowing through the second suction flow path 33 cannot be effectively silenced by the sound absorbing member 42. Further, when the moisture is absorbed by the sound absorbing member 42, the dust is likely to adhere to the sound absorbing member 42 by the absorbed moisture, and the dust adhering to the sound absorbing member 42 also hinders the second suction flow path 33. The generated noise is diffused into the sound absorbing member 42, and the noise generated by the suction wind flowing through the second suction flow path 33 may not be effectively silenced by the sound absorbing member 42. Further, since the suction air containing dust flowing in the extension pipe 5 flows along the upper surface of the inside of the first cylinder 27 and the second cylinder 34, the sound absorbing member 42 is disposed in the second cylinder 34. In the upper portion, the moisture contained in the suction wind and the dust is easily absorbed by the sound absorbing member 42 as compared with the case where the sound absorbing member 42 is disposed in the lower portion of the second cylindrical body 34, and the sound absorbing member 42 may not be silenced for a long period of time. performance.

Therefore, the sound absorbing member 42 may be disposed on the upper portion of the second cylindrical body 34. However, it is preferable to arrange the sound absorbing member 42 at the lower portion of the second cylindrical body 34 from the viewpoint of maintaining the sound absorbing performance of the sound absorbing member 42 for a long period of time. By arranging the sound absorbing member 42 in the lower portion of the second cylindrical body 34, it is possible to sufficiently prevent the moisture contained in the dust attracting wind from being absorbed by the sound absorbing member 42. Therefore, the sound absorbing performance of the sound absorbing member 42 can be maintained for a long period of time, and at the same time, the sound absorbing member 42 can be formed by the second in the industry. The noise generated by the suction wind flowing through the second suction flow path 33 inside the cylindrical body 34 is effectively silenced, and the silent performance of the electric vacuum cleaner 100 can be improved.

(Embodiment 2)

Embodiment 2 of the electric vacuum cleaner of the present invention will be described with reference to Fig. 8 . The same components as those in the first embodiment are denoted by the same reference numerals and will not be described.

Fig. 8 is a cross-sectional view showing the entire longitudinal center portion of the extension pipe in the second embodiment of the electric vacuum cleaner of the present invention.

As shown in Fig. 8, in the present embodiment, the sound absorbing member 42 is composed of the first sound absorbing material 42a, the second sound absorbing material 42b, and the third sound absorbing material 42c. The first sound absorbing material 42a is disposed on the inner lid 41 side. The second sound absorbing material 42b is disposed on the outer cover 35 side and has a higher density than the first sound absorbing material 42a. The third sound absorbing material 42c is disposed between the first sound absorbing material 42a and the second sound absorbing material 42b, and has a higher density than the first sound absorbing material 42a, and has a lower density than the second sound absorbing material 42b. Further, a gap 44 is formed between the first sound absorbing material 42a and the third sound absorbing material 42c, and between the third sound absorbing material 42c and the second sound absorbing material 42b. Further, the gap 44 formed between the first sound absorbing material 42a and the third sound absorbing material 42c and between the third sound absorbing material 42c and the second sound absorbing material 42b is sandwiched between the first sound absorbing material 42a and the third portion by the protruding portion 45. The sound absorbing material 42c is formed between the third sound absorbing material 42c and the second sound absorbing material 42b. The projection 45 is attached to the rib 43 of the outer cover 35 and extends inward from the rib 43. Further, the width of the gap 44 is preferably from 1 mm to 2 mm.

The operation and action of the electric vacuum cleaner configured as described above will be described below.

If the user starts the operation of the vacuum cleaner 100, it will be sent by electric power. The fan 9 produces an attractive wind and creates an attractive force. In this state, when the user moves the suction tool 3 on the surface to be cleaned, the dust on the surface to be cleaned is sucked from the suction tool 3 together with the air. The air sucked from the suction member 3 containing dust passes through a suction air passage (not shown) formed by the suction tool 3, the extension pipe 5, and the hose 4, and flows into the cleaner body 1 from the suction port 1a. The dust-containing air that flows into the cleaner body 1 flows into the interior of the dust collecting device 2.

At this time, in the suction air passage (not shown) until the suction air generated by the electric blower 9 reaches the cleaner body 1 from the suction body 3, the inner wall of the extension pipe 5, the suction member 3 and the extension pipe 5 are extended. The connection between the connecting portion (not shown) and the connecting portion (not shown) of the extension tube 5 and the hose 4 and the suction wind may cause noise in a high frequency region including 1 kHz or more, and the noise may sometimes occur. Give the user an unpleasant feeling.

In the present embodiment, the sound absorbing member 42 is configured such that the first sound absorbing material 42a is disposed on the side of the inner lid 41, and the second sound absorbing material 42b is disposed on the outer lid 35 side, and has a higher density. The first sound absorbing material 42a and the third sound absorbing material 42c are disposed between the first sound absorbing material 42a and the second sound absorbing material 42b, and have a higher density than the first sound absorbing material 42a, and the density is lower than the second sound absorbing material. In the density of 42b, a gap 44 is provided between the first sound absorbing material 42a, the third sound absorbing material 42c, and the second sound absorbing material 42b. Therefore, the noise that has entered the sound absorbing member 42 from the communication port 40 is diffused and silenced in the first sound absorbing material 42a, and then enters the gap 44 between the first sound absorbing material 42a and the third sound absorbing material 42c, that is, the air layer. (not shown), and by the gap 44, the sound pressure is attenuated and silenced. The noise attenuated by the gap 44 provided between the first sound absorbing material 42a and the third sound absorbing material 42c is intruded into the third sound absorbing material 42c and diffused in the third sound absorbing material 42c. After the sound is silenced, the intrusion is provided in the gap 44 between the third sound absorbing material 42c and the second sound absorbing material 42b, and the sound pressure is attenuated by the gap 44, and the sound is silenced. Further, the noise attenuated by the gap 44 provided between the third sound absorbing material 42c and the second sound absorbing material 42b is diffused, attenuated, and silenced in the second sound absorbing material 42b.

In this way, the noise that has entered the sound absorbing member 42 from the communication port 40 can be gradually increased from the side of the first sound absorbing material 42a disposed on the inner cover 41 side toward the second sound absorbing material 42b on the side of the outer cover 35. Diffusion and attenuation and silence. Therefore, the noise generated in the second suction flow path 33 of the second pipe body 25 constituting one of the suction air passages (not shown) can be effectively diffused into the sound absorbing member 42 while being provided by the sound absorbing member. 42 effectively silences. Thereby, the silent performance of the vacuum cleaner 100 can be improved, and the user can be sufficiently prevented from being unpleasant by the noise generated by the suction air passage (not shown).

In the present embodiment, the projection 45 that has been extended inward from the rib 43 is sandwiched between the first sound absorbing material 42a and the third sound absorbing material 42c, and the third sound absorbing material. Between 42c and the second sound absorbing material 42b, a gap 44 is formed between the first sound absorbing material 42a and the third sound absorbing material 42c and between the third sound absorbing material 42c and the second sound absorbing material 42b. However, as a method of forming a gap 44 between the first sound absorbing material 42a and the third sound absorbing material 42c and between the third sound absorbing material 42c and the second sound absorbing material 42b, the inner lid 41 may be provided to extend toward the outer lid 35 side. a needle-like projection (not shown), and the first sound absorbing material 42a, the third sound absorbing material 42c, and the second sound absorbing material 42b are pierced and held by the needle protrusion (not shown) for the first sound absorbing material 42a A gap 44 is formed between the third sound absorbing material 42c and the third sound absorbing material 42c and the second sound absorbing material 42b. Further, a needle-like projection (not shown) may be extended inward from the outer cover 35, and the first sound absorbing material 42a and the third suction may be sucked. The sound absorbing material 42c and the second sound absorbing material 42b are punctured and held by the acicular projections (not shown), and between the first sound absorbing material 42a and the third sound absorbing material 42c, and the third sound absorbing material 42c and the second sound absorbing material. A gap 44 is formed between 42b.

Further, in the present embodiment, a configuration is described in which a gap 44 is formed between the first sound absorbing material 42a and the third sound absorbing material 42c and between the third sound absorbing material 42c and the second sound absorbing material 42b. However, it may be formed between the first sound absorbing material 42a and the third sound absorbing material 42c, and the gap 44 between the third sound absorbing material 42c and the second sound absorbing material 42b, and may be disposed differently from the first sound absorbing material 42a and the second sound absorbing material. A material of the material 42b and the third sound absorbing material 42c and having a sound absorbing effect.

(Embodiment 3)

Embodiment 3 of the electric vacuum cleaner of the present invention will be described with reference to Figs. 9 to 12 . In addition, since the entire structure of the vacuum cleaner and the structure of the cleaner body are the same as those of the first embodiment, the detailed description thereof will be omitted. Hereinafter, the hose according to the features of the present embodiment will be described in detail.

Fig. 9 is a perspective view showing the entire hose of the third embodiment of the electric vacuum cleaner of the present invention. Fig. 10 is a central cross-sectional view showing a hose in a third embodiment of the electric vacuum cleaner of the present invention. In addition, FIG. 11 is an exploded perspective view of the front end tube in the third embodiment of the electric vacuum cleaner of the present invention viewed from above. In addition, FIG. 12 is an exploded perspective view of the front end tube in the first embodiment of the electric vacuum cleaner of the present invention viewed from below.

As shown in FIG. 9 and FIG. 10, the hose 4a is provided with a hose main body 51 which is flexible, and the connecting pipe 8 is provided at the end of the vacuum cleaner main body 1 side of the hose main body 51; The tube 7a is provided at the end of the extension body 5 side of the hose body 51 and serves as a sound absorbing portion. The hose 4a is configured to pass through the connecting pipe 8. The suction port 1a of the cleaner body 1 is connected to be detachably attached, and is connected to the extension pipe 5 through the front end pipe 7a so as to be detachable. Further, an intake air passage 54 is formed in the inside of the hose main body 51, the connecting pipe 8, and the front end pipe 7a, and the suction flow path 54 constitutes attraction of the suction wind generated by the electric blower 9 to the cleaner body 1. One part of the wind road (not shown).

The first attaching and detaching operation portion 55 is provided on the upper surface of the connecting pipe 8, and the first attaching and detaching operating portion 55 is attached to and detached from the hose 4a and the cleaner body 1. The fitting projection 55a provided at the end of the first attachment/detachment operation portion 55 on the cleaner body 1 side is fitted into a fitting recess (not shown) provided in the suction port 1a of the cleaner body 1, and the hose 4a is fitted. It is connected to the cleaner body 1 so as to be detachable. Further, a connection terminal (not shown) that is electrically connected to a commercial power source (not shown) that has been supplied to the cleaner body 1 is provided at an end portion of the connection pipe 8 on the side of the cleaner body 1. Further, a lead wire (not shown) electrically connected to a connection terminal (not shown) is disposed in the connection pipe 8, the hose main body 51, the distal end pipe 7a, and the extension pipe 5. By connecting the hose 4a to the cleaner body 1, the commercial power source (not shown) that has been supplied to the cleaner body 1 is supplied to a connection terminal (not shown) and a lead wire (not shown), and is supplied to the cleaner body. A commercial power source (not shown) is supplied to the suction tool 3 through the connection pipe 8, the hose main body 51, the front end pipe 7a, and the extension pipe 5.

As shown in FIGS. 9 to 12, the distal end tube 7a is composed of a cylindrical body 57, a lid body 58, and a sound absorbing member 59. The cylindrical body 57 has an intake air passage 54 that constitutes a part of a suction air passage (not shown), and has a plurality of openings 56 that communicate with the intake air passage 54 at the lower portion. The lid body 58 is attached to the lower portion of the cylindrical body 57 and the cylindrical body 57 while covering the plurality of openings 56. The sound absorbing member 59 is disposed between the plurality of openings 56 and the lid 58.

Here, in the present embodiment, the upper portion of the upper portion of the cylindrical body 57 in the radial direction of the cylindrical body 57 is the arrow mark X side shown in Figs. 9 to 12 . Further, the lower portion of the cylindrical body 57 is a lower portion in the radial direction of the cylindrical body 57, and is on the side of the arrow mark Y shown in Figs. 9 to 12 .

A second attaching and detaching operation portion 60 is provided at an end portion of the upper portion of the tubular body 57 on the side of the extension pipe 5, and the second attaching and detaching operation portion 60 attaches and detaches the extension pipe 5 and the hose 4a. Moreover, the hose 4a is fitted by engaging the engaging claw portion 60a provided in the second attaching and detaching operation portion 60 with the engaging projection portion (not shown) provided at the end portion of the extension tube 5 on the side of the hose 4a. It is connected to the extension tube 5 so as to be freely attachable and detachable. Further, a handle portion 6 held by the user when the vacuum cleaner 100 is used is provided on the upper portion of the tubular body 57. A manual operation unit 62 is provided on the upper surface of the handle portion 6, and the manual operation unit 62 is a user who selects an operation mode (for example, a strong, medium, weak, or closed suction force) for operating the electric blower 9.

The plurality of openings 56 are provided in the lower portion of the cylinder 57 along the longitudinal direction of the cylinder 57. Further, a first rib 63 extending from the cylindrical body 57 toward the lid body 58 is formed at a lower portion of the cylindrical body 57, and the first rib portion 63 is formed to surround the plurality of openings 56. Further, a second rib 64 extending from the lid body 58 toward the cylindrical body 57 is formed at a position facing the first rib 63 on the inner surface of the lid body 58. The second rib 64 is formed in a state in which the lid body 58 is attached to the tubular body 57, and the first rib 63 is inserted into the inside of the second rib 64. Further, a sealing member 65 is disposed on the outer circumference of the first rib 63. When the lid body 58 is attached to the tubular body 57, the end portion of the second rib portion 64 on the cylindrical body 57 side is in contact with the sealing member 65, whereby the first rib portion 63 and the second rib portion 64 are held. Air tightness.

The sound absorbing member 59 is disposed in the shape of the first rib 63 and the second rib 64 The interior of the space (not shown). Further, the sound absorbing member 59 is formed to have a size substantially equal to the size of the space formed by the first rib 63 and the second rib 64. Further, the sound absorbing member 59 is formed by laminating a plurality of sound absorbing materials (not shown) so that the density on the side of the lid body 58 is higher than the density on the side of the opening portion 56.

Here, in the present embodiment, the density of the sound absorbing member 59 on the side of the lid body 58 and the density of the sound absorbing member 59 on the side of the opening portion 56 are set to 1 cm in the thickness of the sound absorbing member 59, and the area of the sound absorbing member 59 is made 1 m. ^{At 2} o'clock, the number of grams of the sound absorbing material (not shown) included in the side of the lid body 58 of the sound absorbing member 59 and the side of the opening portion 56 of the sound absorbing member 59.

In general, in a state where the hose 4a, the extension tube 5, and the suction member 3 are connected to the cleaner body 1, when the user starts the operation of the vacuum cleaner 100 and the suction blows by the electric blower 9, the cleaning surface is cleaned. The dust flows into the cleaner body 1 from the suction port 1a through a suction air passage (not shown) formed by the suction member 3, the extension pipe 5, and the hose 4a. At this time, in the suction air passage (not shown) when the suction air generated by the electric blower 9 reaches the cleaner body 1 from the suction tool 3, the inner wall of the front end pipe 7a rubs against the suction wind, and the front end The connection between the tube 7a and the connection portion (not shown) of the hose body 51 and the suction wind may cause noise in a high frequency region including 1 kHz or more. In particular, sounds in the high frequency range of 1 kHz to 4 kHz sometimes give the user an unpleasant feeling.

Therefore, in order to sufficiently prevent the user from feeling unpleasant due to the noise in the high-frequency range of 1 kHz or more generated by the suction air passage (not shown), it is necessary to reduce the noise caused by the suction air passage to include 1 kHz or more. The noise of the high frequency field. Especially in the noise of high frequency areas containing more than 1 kHz, it must be reduced Low frequency sounds from 1 kHz to 4 kHz.

Therefore, the sound absorbing member 59 can be formed such that the density of the side of the cover body 58 of the sound absorbing member 59 is higher than the density of the side of the opening portion 56. When the density of the sound-absorbing member 59 on the lid body 58 side is D3 and the density on the opening portion 56 side is D4, the cover body 58 of the sound absorbing member 59 is obtained from the viewpoint of reducing the sound in the high-frequency range of 1 kHz or more. The density D3 of the side and the density D4 of the opening portion 56 side of the sound absorbing member 59 preferably satisfy the conditions (5) and (6).

Condition (5) 200 ≦ D3 ≦ 800

Condition (6) 0.1 × D3 ≦ D4 ≦ 0.9 × D3

Hereinafter, the relationship between the density D3 on the lid body 58 side of the sound absorbing member 59 and the density D4 on the opening portion 56 side of the sound absorbing member 59 will be described using Table 2.

The front end tube 7a used in the experiment was formed by ABS resin. Further, the cross-sectional area in the radial direction of the suction flow path 54 formed in the cylindrical body 57 is 1300 mm ² , the length of the longitudinal direction of the cylindrical body 57 is 254 mm, and the suction wind flowing inside the cylindrical body 57 is formed. The flow rate was made to 2.5 m ³ /min. Further, 123 openings 56 having a diameter of 2 mm were formed in the lower portion of the cylindrical body 57.

The following noise is compared, that is, when the flow rate is 2.5 m ³ /min, and air is caused to flow into the inside of the cylindrical body 57 without the opening 56 and the sound absorbing member 59, and When the flow rate is 2.5 m ³ /min and the air flows into the inside of the cylindrical body 57 in which the sound absorbing member 59 is provided, it is generated in the cylindrical body 57. When the sound of the high frequency range of 1 kHz or more can be reduced by 30% or more by the sound absorbing member 59, and ○ can be sufficiently used as a product, the sound of the high frequency range of 1 kHz or more can be reduced by the sound absorbing member 59. When it is less than 30%, it can be used as a product, and Δ can be used, and the sound in the high-frequency range of 1 kHz or more can be reduced by less than 10% by the sound absorbing member 59, and can be used as a product.

As shown in Table 2, the density D3 on the side of the lid body 58 of the sound absorbing member 59 is made 100 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is 0.1 times the density D3 of the side of the lid body 58 of the sound absorbing member 59. When the value is changed to 1.1 times, the sound in the high frequency range of 1 kHz or more cannot be sufficiently reduced in all the densities of the density D4 on the side of the opening portion 56 of the sound absorbing member 59. It is considered that since the density D3 on the side of the lid body 58 of the sound absorbing member 59 is too low, the noise that has entered the sound absorbing member 59 from the plurality of openings 56 cannot be silenced by the side of the lid body 58 of the sound absorbing member 59.

Further, the density D3 on the side of the lid body 58 of the sound absorbing member 59 is set to 1000 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is changed from 0.1 times to 0.9 times the density D3 of the lid body 58 side of the sound absorbing member 59. At the time of opening the sound absorbing member 59 In all the densities of the density D4 on the side of the mouth portion 56, the sound in the high frequency range of 1 kHz or more cannot be sufficiently reduced. It is considered that since the density D3 on the side of the lid body 58 of the sound absorbing member 59 is too high, the opening portion 56 side of the sound absorbing member 59 cannot be effectively diffused toward the side of the lid body 58 of the sound absorbing member 59, and cannot be used by The cover 58 side of the sound absorbing member 59 is silenced. Further, when the density D3 on the side of the lid body 58 of the sound absorbing member 59 is 1000 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is 1.0 times and 1.1 times the density D3 on the side of the lid body 58 of the sound absorbing member 59. It is also impossible to sufficiently reduce the sound of the high frequency field above 1 kHz. It is considered that the density D4 of the sound absorbing member 59 on the side of the opening portion 56 is too high. Therefore, the noise that enters the sound absorbing member 59 from the plurality of openings 56 is sound-insulated by the opening portion 56 of the sound absorbing member 59, and cannot be effectively It is diffused to the inside of the sound absorbing member 59.

Further, the density D3 on the side of the lid body 58 of the sound absorbing member 59 is made 200 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is changed from 0.1 times the density D3 of the side of the lid body 58 of the sound absorbing member 59 to 0.9. In the case of the multiple density D4 of the sound absorbing member 59 on the side of the opening portion 56, the sound in the high frequency region of 1 kHz or more can be reduced, and in particular, the sound in the high frequency region near 4 kHz can be reduced. However, when the density D3 on the lid body 58 side of the sound absorbing member 59 is 200 g, and the density D4 on the opening portion 56 side of the sound absorbing member 59 is 1.0 times and 1.1 times the density D3 on the lid body 58 side of the sound absorbing member 59. It is impossible to sufficiently reduce the sound of the high frequency field above 1 kHz. It is considered that the sound absorbing member 59 has a characteristic that the lower the density of the sound absorbing member 59, the sound in the high frequency region is easily absorbed in the high frequency region of 1 kHz or higher, and the sound absorbing by the sound absorbing member 59 is possible. The frequency domain will be narrower, and the sound absorption structure The higher the density of the member 59, the sound in the low frequency region to the high frequency region is easily sound-absorbing widely in the high frequency region of 1 kHz or higher, and the frequency of the sound absorbing sound by the sound absorbing member 59 is widened. In other words, the density D3 on the side of the lid body 58 of the sound absorbing member 59 is made 200 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is changed from 0.1 times to 0.9 times the density D3 of the lid body 58 side of the sound absorbing member 59. In the case where the sound of the high-frequency field of 1 kHz or more in the sound absorbing member 59 is infiltrated into the sound absorbing member 59, the noise is effectively diffused from the opening 56 side of the sound absorbing member 59 toward the lid 58 side of the sound absorbing member 59, and Among the sounds of the high frequency range of 1 kHz or more, sounds in the frequency domain higher than 4 kHz are sound-absorbing by the opening portion 56 side of the sound absorbing member 59, and sounds in the frequency domain near 4 kHz in the sound of the high frequency region of 1 kHz or more. The sound is absorbed by the cover 58 side of the sound absorbing member 59. Moreover, when the density D3 on the side of the lid body 58 of the sound absorbing member 59 is 200 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is 1.0 times and 1.1 times the density D3 of the lid body 58 side of the sound absorbing member 59. In the noise in which the sound in the high frequency range of 1 kHz or more is intruded into the sound absorbing member 59 from the plurality of openings 56, the sound in the frequency domain near 4 kHz is sound-absorbing. Therefore, it is generally considered that the high frequency of 1 kHz or more cannot be sufficiently reduced. The voice of the field.

Further, the density D3 on the side of the lid body 58 of the sound absorbing member 59 is set to 400 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is changed from 0.1 times to 0.9 times the density D3 of the lid body 58 side of the sound absorbing member 59. In all the densities of the density D4 on the side of the opening portion 56 of the sound absorbing member 59, the sound in the high frequency range of 1 kHz or more can be reduced, and in particular, the 1 kHz to 4 kHz which is easy to give the user an unpleasant feeling can be sufficiently reduced. The sound of the high frequency field. However, in the sound absorbing member When the density D3 on the side of the lid body 58 of 59 is 400 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is 1.0 times and 1.1 times the density D3 on the side of the lid body 58 of the sound absorbing member 59, the 1 kHz cannot be sufficiently reduced. Above the sound of the high frequency field. It is considered that the density D3 on the side of the lid body 58 of the sound absorbing member 59 is made 400g in accordance with the characteristics of the sound absorbing member 59, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is made from the lid body 58 of the sound absorbing member 59. When the density D3 of the side is changed to 0.9 times, the noise that infiltrates the sound in the high-frequency range of 1 kHz or more from the complex opening 56 into the sound absorbing member 59 is effectively from the opening 56 side of the sound absorbing member 59 toward the sound absorbing member. In the sound of the high frequency region of 1 kHz or higher, sound of a frequency region higher than 4 kHz is sound-absorbing by the opening portion 56 side of the sound absorbing member 59, and at the same time in the high frequency region of 1 kHz or more. In the sound, the sound of the high frequency range of 1 kHz to 4 kHz which is liable to give the user an unpleasant feeling is sound-absorbing by the cover 58 side of the sound absorbing member 59. Further, when the density D3 on the side of the lid body 58 of the sound absorbing member 59 is 400 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is 1.0 times and 1.1 times the density D3 on the side of the lid body 58 of the sound absorbing member 59. In the noise in which the sound in the high-frequency range of 1 kHz or more is included in the sound-absorbing member 59 from the plurality of openings 56, the sound in the frequency domain of the sound in the high-frequency range of only 1 kHz to 4 kHz is sound-absorbing, and therefore it is generally considered that the sound is insufficient. Reduce the sound of the high frequency field above 1 kHz. Further, when the density D3 on the side of the lid body 58 of the sound absorbing member 59 is 400 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is 0.9 times the density D3 on the side of the lid body 58 of the sound absorbing member 59, the sound absorbing member The density D3 on the side of the cover 58 of 59 and the density D4 on the side of the opening 56 of the sound absorbing member 59 constitute substantially the same density, and the density of the side of the cover 58 of the sound absorbing member 59 The difference between the density D4 of the D3 and the opening portion 56 side of the sound absorbing member 59 is reduced. Therefore, the frequency of the sound absorbing sound by the side of the lid body 58 of the sound absorbing member 59 and the opening portion 56 of the sound absorbing member 59 is substantially the same. Therefore, when the density D3 on the side of the lid body 58 of the sound absorbing member 59 is 400 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is 0.9 times the density D3 on the side of the lid body 58 of the sound absorbing member 59, When the density D3 of the sound absorbing member 59 is made 0.1 to 0.8 times the density D3 of the sound absorbing member 59, the sound in the frequency range higher than 4 kHz is hard to be sound-absorbing by the opening 56 side of the sound absorbing member 59, and it is generally considered that the frequency cannot be sufficiently reduced by 1 kHz or more. The sound of the high frequency field.

Further, the density D3 on the side of the lid body 58 of the sound absorbing member 59 is set to 600 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is changed from 0.1 times the density D3 of the side of the lid body 58 of the sound absorbing member 59 to 0.9. In all the densities of the density D4 on the side of the opening portion 56 of the sound absorbing member 59, the sound in the high frequency range of 1 kHz or more can be reduced, and in particular, the 1 kHz to 4 kHz which is easy to give the user an unpleasant feeling can be sufficiently reduced. The sound of the high frequency field. However, when the density D3 on the side of the lid body 58 of the sound absorbing member 59 is 600 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is 1.0 times and 1.1 times the density D3 on the side of the lid body 58 of the sound absorbing member 59, It is impossible to sufficiently reduce the sound of the high frequency field above 1 kHz. It is considered that, according to the characteristics of the sound absorbing member 59, the density D3 on the side of the lid body 58 of the sound absorbing member 59 is made 600g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is made from the lid body 58 of the sound absorbing member 59. When the density of the side D3 is changed to 0.9 times, the noise that enters the sound-absorbing member 59 from the high-frequency domain of 1 kHz or more from the plurality of openings 56 is effectively from the opening 56 side of the sound absorbing member 59 toward the sound absorbing member 59. Side cover 58 side expansion Among the sounds of the high frequency range of 1 kHz or more, the sound of the frequency domain higher than 4 kHz is sound-absorbing by the opening 56 side of the sound absorbing member 59, and is easy to use in the sound of the high frequency range of 1 kHz or more. The sound of the high frequency range of 1 kHz to 4 kHz which brings an unpleasant feeling is absorbed by the cover 58 side of the sound absorbing member 59. Further, when the density D3 on the side of the lid body 58 of the sound absorbing member 59 is 600 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is 1.0 times and 1.1 times the density D3 on the side of the lid body 58 of the sound absorbing member 59. Since the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is too high, it is generally considered that the opening portion 56 side of the sound absorbing member 59 cannot be effectively diffused toward the side of the lid body 58 of the sound absorbing member 59, and sound absorption cannot be performed. The member 59 infiltrates the noise from the complex opening portion 56 into the sound absorbing member 59 including the sound of the high frequency region of 1 kHz or more. Further, when the density D3 on the side of the lid body 58 of the sound absorbing member 59 is 600 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is 0.9 times the density D3 on the side of the lid body 58 of the sound absorbing member 59, When the density D4 of the sound absorbing member 59 on the side of the opening portion 56 of the sound absorbing member 59 is increased by 0.1 times to 0.8 times the density D3 of the sound absorbing member 59, it is considered that the opening of the plurality of openings 56 into the sound absorbing member 59 is generally included. The noise of the sound in the high frequency range of 1 kHz or more is less likely to diffuse into the inside of the sound absorbing member 59, and is not easily silenced by the sound absorbing member 59.

Further, the density D3 on the side of the lid body 58 of the sound absorbing member 59 is set to 800 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is changed from 0.1 times the density D3 of the side of the lid body 58 of the sound absorbing member 59 to 0.9. In all the densities of the density D4 on the side of the opening portion 56 of the sound absorbing member 59, the sound in the high frequency range of 1 kHz or more can be reduced, and in particular, it can be sufficiently reduced to be easily taken to the user. The sound of the high frequency field of 1 kHz to 4 kHz that is unpleasant. However, when the density D3 on the side of the lid body 58 of the sound absorbing member 59 is 800 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is 1.0 times and 1.1 times the density D3 on the side of the lid body 58 of the sound absorbing member 59, It is impossible to sufficiently reduce the sound of the high frequency field above 1 kHz. It is considered that the density D3 on the side of the lid body 58 of the sound absorbing member 59 is set to 800 g in accordance with the characteristics of the sound absorbing member 59, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is made from the lid body 58 of the sound absorbing member 59. When the density of the side D3 is changed to 0.9 times, the noise that enters the sound-absorbing member 59 from the high-frequency domain of 1 kHz or more from the plurality of openings 56 is effectively from the opening 56 side of the sound absorbing member 59 toward the sound absorbing member 59. In the sound of the high frequency region of 1 kHz or higher, the sound of the frequency region higher than 4 kHz absorbs sound by the opening portion 56 side of the sound absorbing member 59, and sounds in the high frequency region of 1 kHz or higher. In the high frequency range of 1 kHz to 4 kHz, which is liable to give the user an unpleasant feeling, the sound is absorbed by the cover 58 side of the sound absorbing member 59. Moreover, when the density D3 on the side of the lid body 58 of the sound absorbing member 59 is 800 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is 1.0 times and 1.1 times the density D3 of the lid body 58 side of the sound absorbing member 59. Since the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is too high, it is generally considered that the opening portion 56 side of the sound absorbing member 59 cannot be effectively diffused toward the side of the lid body 58 of the sound absorbing member 59, and sound absorption cannot be performed. The member 59 infiltrates the noise from the complex opening portion 56 into the sound absorbing member 59 including the sound of the high frequency region of 1 kHz or more. Further, when the density D3 on the side of the lid body 58 of the sound absorbing member 59 is 800 g, and the density D4 on the side of the opening portion 56 of the sound absorbing member 59 is 0.7 times to 0.9 times the density D3 of the lid body 58 side of the sound absorbing member 59. Compared to making When the density D4 of the sound absorbing member 59 on the side of the opening portion 56 of the sound absorbing member 59 is increased by 0.1 times to 0.6 times the density D3 of the sound absorbing member 59, it is considered that the sound insulating member 59 is inserted into the sound absorbing member 59 from the complex opening portion 56 to include 1 kHz or more. The noise of the sound in the high frequency range is less likely to diffuse into the inside of the sound absorbing member 59, and is not easily silenced by the sound absorbing member 59.

According to the above, in order to sufficiently prevent the user from being dissatisfied by the noise in the high frequency region including 1 kHz or more generated by the suction air passage, the density D3 of the cover 58 side of the sound absorbing member 59 and the sound absorbing member 59 are The density D4 on the side of the opening portion 56 preferably satisfies the condition (5) and the condition (6). Further, in order to more sufficiently prevent the user from being disturbed by the noise in the high frequency range of 1 kHz or more due to the suction air passage, the density D3 on the side of the cover 58 of the sound absorbing member 59 and the sound absorbing member 59 are The density D4 on the side of the opening portion 56 preferably satisfies the condition (7) and the condition (8).

Condition (7) 400 ≦ D3 ≦ 800

Condition (8) 0.2 × D3 ≦ D4 ≦ 0.6 × D3

The operation and action of the electric vacuum cleaner configured as described above will be described below.

When the user attaches the hose 4a, the extension tube 5, and the suction member 3 to the cleaner body 1, when the user starts the operation of the vacuum cleaner 100, the suction blows by the electric blower 9 generate an attractive force. In this state, when the user moves the suction tool 3 on the surface to be cleaned, the dust on the surface to be cleaned is sucked from the suction tool 3 together with the air. The air that sucks the dust from the suction member 3 is transmitted through the suction air passage (not shown) formed by the suction tool 3, the extension pipe 5, and the hose 4a, and flows into the cleaner body 1 from the suction port 1a. The dust-containing air that flows into the cleaner body 1 flows into the interior of the dust collecting device 2.

At this time, in the suction air passage (not shown) when the suction air generated by the electric blower 9 reaches the cleaner body 1 from the suction tool 3, the inner wall of the front end pipe 7a rubs against the suction wind, and the front end The friction between the connection portion (not shown) of the tube 7a and the hose main body 51 and the suction wind may cause noise in a high frequency region including 1 kHz or more, and may cause an unpleasant feeling to the user.

In the present embodiment, the sound absorbing member 59 is formed such that the density of the sound absorbing member 59 gradually increases from the opening portion 56 side toward the lid body 58 side, so that the density of the sound absorbing member 59 on the side of the lid body 58 is higher than that of the sound absorbing member. The density of the opening portion 56 side of the member 59. Therefore, the noise that has entered the sound absorbing member 59 by the plurality of openings 56 provided in the opening 56 is diffused in the sound absorbing member 59 having a low density on the side of the opening 56, and the sound pressure is attenuated. The noise that is silenced in the sound absorbing member 59 having a low density on the opening portion 56 side advances in the sound absorbing member 59 from the opening portion 56 side toward the lid body 58 side, and the sound pressure is attenuated by the sound absorbing member 59. Further, the noise that has reached the side of the lid body 58 is diffused in the sound absorbing member 59 having a high density on the side of the lid body 58, and the sound pressure is attenuated and silenced. Thereby, the noise generated in the suction flow path 54 of the distal end tube 7a constituting one of the suction air passages (not shown) can be effectively diffused into the sound absorbing member 59 while being effectively effective by the sound absorbing member 59. Silence. Therefore, the mute performance of the vacuum cleaner 100 can be improved, and the user can be sufficiently prevented from being unpleasant by the noise generated by the suction air passage (not shown). Further, in the above-described structure, in particular, the sound absorbing effect in the high frequency region of 1 kHz or more included in the following noise is remarkable, that is, in the cylindrical body 57 of the distal end tube 7a constituting one of the suction air passages (not shown). Producer.

In the present embodiment, a plurality of superimposed sound absorbing materials (not shown) will be described. On the other hand, the sound absorbing member 59 has a structure in which the density on the side of the lid body 58 is higher than the density on the side of the opening portion 56. However, the sound absorbing member 59 may be formed so that the density of the side of the lid body 58 is higher than the density of the opening portion 56. For example, the sound absorbing member 59 may be formed such that the density of the sound absorbing member 59 on the side of the lid body 58 is higher than the density of the opening portion 56 by a permeable sound absorbing material (not shown). Further, when the sound absorbing member 59 is configured by a sound absorbing material (not shown) having a plurality of different densities, only a plurality of sound absorbing materials (not shown) may be stacked, or may be laminated or thermally welded. A plurality of sound absorbing materials (not shown) are integrally formed. Further, when the sound absorbing member 59 is formed by at least three sound absorbing materials (not shown) having different densities, the density may be gradually increased from the side of the opening portion 56 toward the side of the lid body 58. The density between the side of the opening 56 of the sound absorbing member 59 and the side of the lid 58 may be higher than the density of the side of the opening 56 of the sound absorbing member 59.

In the present embodiment, the structure in which the sound absorbing member 59 is disposed on the lower portion of the cylindrical body 57 will be described. However, the opening 56 and the lid 58 may be provided on the upper portion of the cylindrical body 57, and at the same time. The sound absorbing member 59 is disposed between the lid body 58 and the opening portion 56, and the sound absorbing member 59 is disposed above the tubular body 57.

In general, in a state where the user uses the electric vacuum cleaner 100, the suction air flowing in the end pipe 7a before the hose 4a flows along the upper surface of the inside of the cylinder 57. Therefore, when the sound absorbing member 59 is disposed in the upper portion of the cylindrical body 57, the noise generated inside the cylindrical body 57 can be effectively silenced by the sound absorbing member 59, and the sound absorbing member 59 can be used. The noise generated in the end tube 7a before the hose 4a is effectively silenced. Therefore, the silent performance of the vacuum cleaner 100 can be improved, and the suction path can be sufficiently prevented (not shown). The noise generated by the display gives the user an unpleasant feeling.

However, in general, the suction wind generated by the electric blower 9 contains moisture such as moisture in the air, and the dust on the cleaning surface contains moisture such as moisture in the air. When the moisture contained in the suction wind and the dust is absorbed by the sound absorbing member 59, the moisture absorbed by the sound absorbing member 59 hinders the noise generated by the suction flow path 54 which has been formed inside the cylindrical body 57, and absorbs the sound. The diffusion in the member 59 may cause the noise generated by the suction wind flowing through the suction flow path 54 to be effectively silenced by the sound absorbing member 59. Further, when the moisture is absorbed by the sound absorbing member 59, the dust is likely to adhere to the sound absorbing member 59 by the absorbed moisture, and the dust which has adhered to the sound absorbing member 59 also hinders the generation of the air absorbing path 54. The noise is diffused into the sound absorbing member 59, and the noise generated by the suction wind flowing through the suction flow path 54 may not be effectively silenced by the sound absorbing member 59. Further, since the suction air containing dust flowing in the end pipe 7a before the hose 4a flows along the upper surface of the inside of the cylindrical body 57, when the sound absorbing member 59 is disposed on the upper portion of the cylindrical body 57, compared with When the sound absorbing member 59 is disposed below the cylindrical body 57, the moisture contained in the suction wind and the dust is easily absorbed by the sound absorbing member 59, and the sound absorbing performance of the sound absorbing member 59 may not be maintained for a long period of time.

Therefore, the sound absorbing member 59 may be disposed on the upper portion of the tubular body 57. However, it is preferable to arrange the sound absorbing member 59 at the lower portion of the tubular body 57 from the viewpoint of maintaining the sound absorbing performance of the sound absorbing member 59 for a long period of time. By arranging the sound absorbing member 59 at the lower portion of the cylindrical body 57, it is possible to sufficiently prevent the moisture contained in the dust attracting wind from being absorbed by the sound absorbing member 59. Therefore, the sound absorbing performance of the sound absorbing member 59 can be maintained for a long period of time. At the same time, the noise generated by the suction wind flowing through the suction flow path 54 which has been formed inside the cylindrical body 57 can be effectively silenced by the sound absorbing member 59, and the silent performance of the electric vacuum cleaner 100 can be improved.

As described above, the electric vacuum cleaner of the present invention includes: a vacuum cleaner body that is internally provided with an electric blower, and the electric blower generates a suction air that attracts dust on the surface to be cleaned; and the sound absorbing portion is disposed by the electric blower The generated wind is attracted to the air cleaner by the suction air. The sound absorbing portion is configured such that the cylindrical body has an intake air flow path that constitutes one of the suction air passages and has at least one opening portion, and the cover body is attached to the tubular body and covers the opening. And the sound absorbing member is disposed between the opening and the cover. The sound absorbing member is formed such that the density on the side of the lid body is higher than the density on the side of the opening portion.

Thereby, since the sound absorbing member is formed such that the density on the side of the lid body is higher than the density on the side of the opening portion, it is possible to effectively generate noise by the suction wind flowing through the intake passage formed in the inside of the cylinder. The opening is diffused from the opening to the inside of the sound absorbing member. Therefore, the noise generated by the suction wind flowing inside the cylinder can be effectively silenced by the sound absorbing member, and the mute performance of the electric vacuum cleaner can be improved.

Further, in the electric vacuum cleaner of the present invention, the sound absorbing member is formed by a plurality of sound absorbing materials.

Thereby, the sound absorbing member can be easily formed as the sound absorbing member, and the density of the outer cover side is higher than the density of the opening side, and the sound absorbing member can be formed by matching the shape of the cylindrical body or the shape of the opening portion. The noise generated by the suction wind flowing through the intake passage formed inside the cylinder, The effect is diffused from the opening to the inside of the sound absorbing member, and the noise generated by the suction wind flowing inside the cylinder can be effectively silenced by the sound absorbing member, and the silent performance of the vacuum cleaner can be improved.

Further, in the electric vacuum cleaner of the present invention, a structure is formed in which a gap is formed between the plurality of sound absorbing materials.

Thereby, the noise generated by the suction wind flowing through the intake passage formed inside the cylinder is diffused into the interior of the sound absorbing material, and then diffused into the gap formed between the plurality of sound absorbing materials, that is, the air layer. And then diffused into the sound absorbing material, so that the noise generated by the suction wind flowing through the intake passage formed inside the cylinder can be effectively silenced by the sound absorbing material, and can be formed by The gap between the multiple sound absorbing materials attenuates the noise. Therefore, the noise generated by the suction wind flowing through the intake passage formed inside the cylinder can be effectively silenced by the sound absorbing member, and the silent performance of the vacuum cleaner can be improved.

Further, in the electric vacuum cleaner of the present invention, the sound absorbing member is configured to be disposed on the lower portion of the tubular body.

Thereby, the sound absorbing performance of the sound absorbing member can be maintained, and the noise generated by the suction wind flowing through the intake passage formed inside the cylinder can be effectively silenced by the sound absorbing member, and the electric vacuum cleaner can be improved. Silent performance.

Further, in the electric vacuum cleaner of the present invention, the suction tool that sucks the dust on the surface to be cleaned and the extension pipe that is detachably connected to the suction member are provided. The sound absorbing portion is an extension tube, and a rib portion extending from the inner surface of the lid body toward the cylindrical body side is provided at a position facing the lid body and the opening portion. The sound absorbing member is configured to borrow The inside of the space formed by the cover, the rib, and the opening.

Thereby, by arranging the sound absorbing member inside the space formed by the lid body, the rib portion, and the opening portion, the sound absorbing member is not separated from the position facing the opening portion during the dust collecting operation, and the sound absorbing member can be surely The ground is held between the opening and the cover. Therefore, the noise generated by the suction wind flowing through the intake passage formed in the inside of the cylinder can be efficiently and surely diffused from the opening to the inside of the sound absorbing member. As a result, the noise generated by the suction wind flowing inside the cylinder can be effectively silenced by the sound absorbing member, and the silent performance of the vacuum cleaner can be improved.

Further, the electric vacuum cleaner of the present invention includes a hose, and the hose has one end connected to the cleaner body and a distal end tube at the other end. The sound absorbing portion is a front end tube, and a first rib extending from the cylindrical body toward the lid body is provided at an opening of the cylindrical body. A second rib extending from the inner surface of the lid body toward the tubular body side is provided at a position facing the lid body and the opening portion. The sound absorbing member is disposed inside the space formed by the first rib and the second rib.

Thereby, by arranging the sound absorbing member in the space formed by the first rib and the second rib, the sound absorbing member is not detached from the position facing the opening during the dust collecting operation, and the sound absorbing member can be surely It is held between the opening and the cover. Therefore, the noise generated by the suction wind flowing through the intake passage formed in the inside of the cylinder can be efficiently and surely diffused from the opening to the inside of the sound absorbing member. As a result, the noise generated by the suction wind flowing inside the cylinder can be effectively silenced by the sound absorbing member, and the silent performance of the vacuum cleaner can be improved.

As described above, the electric vacuum cleaner of the present invention can be constructed by using a hose The noise generated by the suction of the internal flow of the front end pipe or the extension pipe effectively silences the sound, and can improve the silent performance of the electric vacuum cleaner, and therefore can be suitably applied to the field of household electric vacuum cleaners and industrial electric vacuum cleaners. use.

1‧‧‧ vacuum cleaner body

1a‧‧‧Inhalation

2‧‧‧dust collection device

3,205‧‧‧Inhalation parts

4,4a‧‧‧Hose

5,204,220‧‧‧ Extension tube

6‧‧‧Hands

7,7a‧‧‧ front end tube

8‧‧‧Connecting tube

9‧‧‧Electric blower

10‧‧‧Electric blower room

11‧‧‧Dust collector installation department

12‧‧‧ Wheels

13‧‧‧ casters

14‧‧‧ body handle

15‧‧‧Dust collector body

16‧‧‧One filter

17‧‧‧Outreach

18‧‧‧Secondary filter

19‧‧‧Upper cover

20‧‧‧Under cover

21‧‧‧ dust collecting device handle

22‧‧‧Dust Removal Department

23‧‧‧ Drive Department

24‧‧‧1st body

25‧‧‧2nd body

26‧‧‧1st suction flow path

27‧‧‧1st cylinder

28‧‧‧Upper cover

28a‧‧‧1st cover

28b‧‧‧2nd cover

28c‧‧‧through hole

29‧‧‧Lower cover

30‧‧‧Sliding operation department

30a‧‧‧Snap protrusion

31‧‧‧ Space Department

32‧‧‧Inlet

33‧‧‧2nd suction flow path

34‧‧‧2nd cylinder

35,225‧‧‧ Cover

35a‧‧‧Clamping recess

36‧‧‧Loading and Discharging Operations Department

37‧‧‧Sliding Support

38‧‧‧The Ministry of the Cavity

39,56,221‧‧‧ openings

40‧‧‧Connected

41,224‧‧‧ inner cover

42,59‧‧‧Acoustic components

42a‧‧‧1st sound absorbing material

42b‧‧‧2nd sound absorbing material

42c‧‧‧3rd sound absorbing material

43‧‧‧ ribs

44‧‧‧ gap

45‧‧‧ protrusion

51‧‧‧Hose body

54‧‧‧Intake flow path

55‧‧‧1st loading and unloading operation department

55a‧‧‧ fitting protrusion

57,222‧‧‧Cylinder

58‧‧‧ Cover

60‧‧‧2nd loading and unloading operation department

60a‧‧‧Clamping claws

62‧‧‧Manual operation department

63‧‧‧1st rib

64‧‧‧2nd rib

65‧‧‧ Sealing members

100‧‧‧ electric vacuum cleaner

201‧‧‧ electric vacuum cleaner body

202‧‧‧Hand tube

203‧‧‧ suction hose

206‧‧‧Uplift

207‧‧‧Air volume adjustment hole

208‧‧‧Air volume control valve

209‧‧‧Air volume adjustment mechanism

210‧‧‧slit

211,226‧‧‧Acoustic materials

223‧‧‧ Sound absorbing holes

X, Y‧‧‧ arrow mark

Fig. 1 is a perspective view showing the entirety of a first embodiment of the electric vacuum cleaner of the present invention.

Fig. 2 is a cross-sectional view showing the entire vacuum cleaner body in the first embodiment of the electric vacuum cleaner of the present invention.

3A is a perspective view of the extension pipe in a state in which the second pipe body is housed inside the first pipe body in the first embodiment of the electric vacuum cleaner of the present invention.

Fig. 3B is a perspective view showing the entire length of the extension pipe in a state in which the first pipe body and the second pipe body are extended in the first embodiment of the electric vacuum cleaner of the present invention.

Fig. 4 is a cross-sectional view showing the entire center portion of the extension pipe shown in Fig. 3B.

Fig. 5 is an exploded perspective view showing the first pipe body in the first embodiment of the electric vacuum cleaner of the present invention.

Fig. 6 is an exploded perspective view showing the second tube body when the second tube body in the first embodiment of the electric vacuum cleaner of the present invention is viewed from above (the arrow mark X direction disclosed in Figs. 3A and 3B).

Fig. 7 is an exploded perspective view showing the second tube body when the second tube body in the first embodiment of the electric vacuum cleaner of the present invention is viewed from above (the arrow symbol Y direction disclosed in Figs. 3A and 3B).

Fig. 8 is a cross-sectional view showing the entire longitudinal center portion of the extension pipe in the second embodiment of the electric vacuum cleaner of the present invention.

Fig. 9 is a perspective view showing the entire hose of the third embodiment of the electric vacuum cleaner of the present invention.

Figure 10 is a central cross-sectional view showing a hose in a third embodiment of the electric vacuum cleaner of the present invention.

Fig. 11 is an exploded perspective view showing the front end tube in the third embodiment of the electric vacuum cleaner of the present invention as seen from above.

Fig. 12 is an exploded perspective view showing the front end tube in the third embodiment of the electric vacuum cleaner of the present invention viewed from below.

Fig. 13A is a side view showing a conventional electric vacuum cleaner.

Figure 13B is a cross-sectional view of a hand held tube of a conventional electric vacuum cleaner.

Figure 13C is an exploded perspective view showing an extension tube of a conventional electric vacuum cleaner.

5‧‧‧Extension tube

24‧‧‧1st body

25‧‧‧2nd body

26‧‧‧1st suction flow path

27‧‧‧1st cylinder

28‧‧‧Upper cover

28a‧‧‧1st cover

28b‧‧‧2nd cover

28c‧‧‧through hole

29‧‧‧Lower cover

30‧‧‧Sliding operation department

30a‧‧‧Snap protrusion

31‧‧‧ Space Department

32‧‧‧Inlet

33‧‧‧2nd suction flow path

34‧‧‧2nd cylinder

35‧‧‧ Cover

35a‧‧‧Clamping recess

36‧‧‧Loading and Discharging Operations Department

37‧‧‧Sliding Support

38‧‧‧The Ministry of the Cavity

40‧‧‧Connected

41‧‧‧ Inner cover

42‧‧‧Acoustic components

43‧‧‧ ribs

X, Y‧‧‧ arrow mark

Claims (6)

An electric vacuum cleaner comprising: a vacuum cleaner body; a built-in electric blower, wherein the electric blower generates suction attracting dust of the surface to be cleaned; and the sound absorbing part is disposed in the suction wind generated by the electric blower a sound absorbing portion that reaches the vacuum cleaner body; the sound absorbing portion has a cylindrical body, and has an intake air flow path that constitutes one of the suction air passages, and has at least one opening; And the sound absorbing member is disposed between the opening and the cover; and the sound absorbing member is formed such that the density of the cover side is higher than the opening The density of the sides. The electric vacuum cleaner of claim 1, wherein the sound absorbing member is formed by a plurality of sound absorbing materials. An electric vacuum cleaner according to claim 2, wherein a gap is formed between the plurality of sound absorbing materials. The electric vacuum cleaner of claim 1, wherein the sound absorbing member is disposed at a lower portion of the cylindrical body. An electric vacuum cleaner according to any one of claims 1 to 4, further comprising: a suction member for sucking dust on the surface to be cleaned, and an extension tube detachably connected to the suction member, wherein the sound absorbing portion is extended as described above a tube, and the position of the cover body facing the opening portion is set from the front The inner surface of the lid body faces the rib portion extending toward the cylindrical body side, and the sound absorbing member is disposed inside the space formed by the lid body, the rib portion, and the opening portion. The electric vacuum cleaner according to any one of claims 1 to 4, further comprising: a hose, wherein the one end of the hose is connected to the vacuum cleaner body, and the other end has a front end tube, and the sound absorbing portion is the aforementioned The front end pipe is provided with a first rib extending from the cylindrical body toward the lid body in the opening portion of the cylindrical body, and is provided at a position facing the opening portion of the lid body from the lid body The second rib extending from the inner surface toward the tubular body side, and the sound absorbing member is disposed inside the space formed by the first rib and the second rib.