JPH0685647U - Vacuum cleaner - Google Patents

Abstract

(57) [Summary] [Purpose] To effectively shut off the fan noise of the electric blower fan. [Structure] The electric blower 32 housed in the cleaner body is constructed by housing a motor body 62 inside a cylindrical motor frame 61. The brush mechanism 77 is attached to the motor frame 61. A part of the brush mechanism 77 projects outside the motor frame 61. From the front side of the motor frame 61 to the flange 61
Project b. A fan 84 for blowing air is attached to the front end of the motor body 62. The fan 84 is covered by a fan cover 88 fitted to the flange portion 61b. Behind the fan cover 88, a high-density paper sound insulation plate that fits into the motor frame 61
38 is attached tightly to cut off the noise of feathers. A cut is made in the sound insulating plate 38 to form a cutout portion 92 and a foldable lid piece portion 94 that covers the cutout portion 92. [Effect] The sound insulating plate 38 can be fitted from the rear side of the motor frame 61 to be in close contact with the rear side of the fan cover 88. The cover piece portion 94 closes the notch portion 92, and the sound insulation effect can be improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to an electric vacuum cleaner designed for sound insulation of an electric blower.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, electric vacuum cleaners have been equipped with an electric blower, which sucks dust together with air and captures the dust in a dust bag or the like provided in a dust collection chamber.

For such an electric vacuum cleaner, for example, an electric blower 1 as shown in FIG. 10 is used. The electric blower 1 has a motor frame 2 having a substantially cylindrical shape. Inside the motor frame 2, a rotatable armature (armor) and a motor frame 2 fixed around the armature are fixed to the motor frame 2. And the field (stator). Further, the armature is provided with a commutator, and the motor frame 2 is fixed with a brush mechanism 3 that holds a carbon brush that is in sliding contact with the commutator and is conductive by a brush holder. The brush mechanism 3 is supported in a state of being substantially orthogonal to the axial direction of the armature, and has a large longitudinal dimension. Therefore, the brush mechanism 3 is partially fixed to the outer peripheral side of the motor frame 2 and fixed. There is.

On the other hand, a fan having a diameter larger than that of the motor frame 2 is attached to the tip of the rotary shaft of the armature. The fan is covered with a fan cover 5 having a substantially cylindrical shape. Further, the fan cover 5 is fitted to a flange portion 2a protruding from the tip of the motor frame 2 in the outer peripheral direction.

Then, by driving the armature to rotate the fan, air is sucked from the suction port formed at the tip of the fan cover 5 and blown out from the air outlet 2b formed at the side surface of the motor frame 2. It has become.

Further, when the fan is rotating, for example, a high-frequency fanning noise of about 4.5 kHz is generated, and the fanning noise causes a gap between the fan cover 5 and the flange portion 2a of the motor frame 2, It leaks from a screw hole or the like formed in this flange portion 2a. Therefore, in order to cut off the noise of the feathers, a sound insulating plate 6 made of high-density paper or the like is fitted to the motor frame 2 and in close contact with the rear side of the fan cover 5, It is designed to block out the whistling noise that leaks from screw holes.

[0007]

[Problems to be solved by the device]

 However, in the conventional electric blower 1 described above, a part of the brush mechanism 3 projects to the outer peripheral side of the motor frame 2, and the flange portion 2b projects from the front end of the motor frame 2 toward the outer peripheral side. ing. Therefore, in order to fit the sound insulation plate 6 from the rear side of the motor frame 2 and bring it into close contact with the rear side of the fan cover 5, it is necessary to form a cutout portion 6a for inserting the brush mechanism 3 in the sound insulation plate 6. There is. Therefore, even when the sound insulation plate 6 is in close contact with the rear side of the fan cover 5, it is difficult to improve the quietness of the electric vacuum cleaner because the fanning noise leaks from the notch 6a of the sound insulation plate 6. have.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an electric vacuum cleaner that can effectively block the sound generated by an electric blower.

[0009]

[Means for Solving the Problems]

 The electric vacuum cleaner according to claim 1 is provided with an electric blower and a sound insulating plate that shuts off the sound generated by the electric blower. The electric blower has a substantially cylindrical motor main body and an outer peripheral portion of the motor main body. A protrusion that is partially provided, a fan that is disposed on the front side of the motor body and is driven to rotate by the motor body, and a fan cover that covers the fan and that has a larger diameter than the motor body. The sound insulation plate has a fitting hole that fits into the outer peripheral portion of the motor main body, and the sound insulation plate has the fitting hole fitted into the outer peripheral portion of the motor main body. In the electric vacuum cleaner that is in close contact with the rear side of the fan cover, the sound insulation plate is provided with a notch through which the protrusion can be inserted, and a flexible lid that can close the notch. It is formed by one part.

An electric vacuum cleaner according to a second aspect of the present invention includes an electric blower and first and second sound insulating plates for cutting off sound generated by the electric blower, and the electric blower has a substantially cylindrical motor main body portion. A protrusion protruding from a part of the outer peripheral portion of the motor body, a fan arranged in front of the motor body and driven to rotate by the motor body, and the motor covering the fan. A fan cover having a diameter larger than that of the main body, and each of the sound insulation plates has a fitting hole that fits into an outer peripheral portion of the motor body. In an electric vacuum cleaner that is fitted to the outer peripheral portion of the motor main body and closely adheres to the rear side of the fan cover, notches are formed in each of the sound insulation plates through which the protrusions can be inserted. Install the sound insulation plate of the fan cover The positions of the cutouts of these sound insulation plates are made different from each other in a state of being in close contact with the rear side portion, and the respective cutouts are closed by the sound insulation plates.

[0011]

[Action]

 In the electric vacuum cleaner according to claim 1, since the sound insulation plate is formed with a cutout portion into which the protrusion can be inserted and a flexible lid piece portion capable of closing the cutout portion, the sound insulation plate is used as a motor. When fitted to the main body, the projection penetrates the notch while the lid piece is bent, and the sound insulation plate is easily attached to the rear side of the fan cover. Also, with the sound insulation plate in close contact with the rear side of the fan cover, the notch is closed by the lid piece, and the sound generated by the electric blower is shut off.

In the electric vacuum cleaner according to the second aspect of the present invention, since the first and second sound insulation plates each having the notch through which the protrusion can be inserted are provided, when each sound insulation plate is fitted to the motor main body, The protrusions pass through the cutouts of the sound insulation plates, and the sound insulation plates are easily attached to the rear side of the fan cover. Also, with these sound insulation plates in close contact with the rear side of the fan cover, the positions of the cutouts of these sound insulation plates were made different from each other, and the cutouts were closed by the sound insulation plates, so the electric blower The sound generated by is cut off.

[0013]

【Example】

 Hereinafter, a configuration of an embodiment of the vacuum cleaner of the present invention will be described with reference to the drawings.

In FIG. 2, 11 is a cleaner body, and this cleaner body 11 has a body case 12 whose upper side is opened, and an upper case 14 is attached to the upper side of the body case 12. A lid 15 is attached to the front upper side of the upper case 14 so as to openably and closably open the opening of the body case 12 from above. Further, the upper side of the upper case 14 is continuously covered with a case cover 16, an accessory cover 17, and an exhaust port cover 18 from the rear end of the lid 15 to the upper rear end of the main body case 12. As a whole, a vacuum cleaner body 11 having a substantially egg shell shape whose longitudinal direction is the front-rear direction is formed. In addition, a handle 19 having a substantially U-shape that is vertically slidable is attached to the cleaner body 11 at a substantially central portion in the front-rear direction.

Further, the case cover 16 is provided with a recess 16a for facilitating gripping of the handle 19. The accessory cover 17 is attached so as to be openable and closable, and the accessory storage portion 17a formed on the lower side of the accessory cover 17 stores accessories such as the vine 20. Further, in the exhaust port cover 18, the rear end surface 18a is formed in a substantially vertical plate shape, and the peripheral surface portion 18b is formed so that the diameter dimension is reduced stepwise from the front side to the rear side. In this peripheral surface portion 18b, two exhaust ports 18c, 18d curved in a substantially semicircular shape along the outer peripheral surface of the cleaner body 11 are formed in a substantially concentric shape by shifting the positions forward and backward.

A swing wheel 21 is rotatably mounted on the lower front side of the main body case 12, and a pair of driven wheels 22 is rotatably mounted on both sides of the rear portion. . Furthermore, a band-shaped bumper 23 made of an elastic body is attached to the front peripheral surface of the main body case 12.

Further, the inside of the main body case 12 is divided into front and rear by a partition wall 25 having a lattice hole 25a, and a dust collecting chamber 27 for housing a dust collecting bag 26 is formed in front of the partition wall 25. In addition, the electric blower chamber 28 is formed at the rear side of the partition wall 25. A detachable auxiliary filter 29 that covers the lattice holes 25a is attached to the front side of the partition wall 25.

A holder 31 is provided in the dust collecting chamber 27 so as to face the opening of the body case 12, and the mouth frame 26 a of the dust bag 26 is detachably held by the holder 31.

On the other hand, the electric blower chamber 28 houses an electric blower 32 whose front side is an intake side and whose rear side is an exhaust side. Further, the electric blower 32 is held between rubber holding members (support rubber) 36, 37 by vertical support walls 33, 34, 35 protruding from the main body case 12 and the upper case 14, respectively. In addition to being supported in a closed state, a sound insulating plate 38 having an annular shape is fitted to the outer peripheral portion, and the periphery is covered with a cylindrical sound deadening body 39.

In the electric blower chamber 28, the intake side and the exhaust side of the electric blower 32 are airtightly divided by the holding member 36 on the front side having an annular shape, and the intake side of the electric blower 32 is provided with the grid holes 25a. The exhaust side of the electric blower 32 is communicated with the inside of the exhaust port cover 18 while communicating with the dust collection chamber 27.

The lid 15 is rotatably supported with the rear end as a fulcrum, and is provided near the opening of the main body case 12 by a clamp 44 rotatably provided at the lower end of the front side. It is releasably locked to the locking portion 45 provided. Then, by pulling up the clamp 44 to the upper side, the engagement of the clamp 44 is released, the lid 15 is rotated to the upper side, the opening is opened, and the dust bag 26 is replaced. Has become.

In addition, a lid 51 is provided with an insertion port 51 that is directed upward and upward, and a tubular air passage plate 52 is attached to the rear side of the insertion port 51 and the air passage plate 52 is attached. A cylindrical connecting body 54 is rotatably mounted inside 52, and a suction port 55 is formed inside the connecting body 54 to connect the outside of the cleaner body 11 and the dust collecting chamber 27. There is.

Then, a hose (not shown) having an operation part at its tip is rotatably connected to the suction port 55, and the suction port body is further connected to the tip of the hose via an extension pipe or the like. Are connected. Further, a plate-like shutter 56 that closes the insertion port 51 without connecting the hose described above is provided between the insertion port 51 and the suction port 55 so as to be openable and closable.

Further, the lid 15 is provided with a display plate 58 provided with, for example, a plurality of light emitting diodes 57 indicating the operating state of the electric blower 32 and the like.

Next, the electric blower 32 and the sound insulation plate 38 will be described.

As shown in FIGS. 1 and 2, the electric blower 32 has a motor frame 61 having a substantially cylindrical shape, and the motor main body 62 is housed inside the motor frame 61. The part 63 is formed.

The motor frame 61 has an opening 61a formed in the front end surface thereof, and a flange 61b having a substantially U-shaped cross section which is bent toward the outer peripheral direction is formed around the opening 61a. Has been done. The rear end surface of the motor frame 61 is closed by a rear plate portion 61c, and the central portion of the rear plate portion 61c is recessed rearward to form a bearing recess 61d. The spring 64, the bearing 65, and the like housed in the recess 61d constitute a rear bearing 66. A holding member 37 is fitted on the outside of the bearing recess 61d.

Further, on the side surface near the rear end of the motor frame 61, a pair of air outlets 61e on both sides is formed.

A plurality of screw holes 67 are formed in the flange portion 61 b of the motor frame 61, and the screws 68 screwed into the screw holes 67 are positioned on the front side of the motor frame 61 so that the front frame 71 Is attached. A bearing recess 71a recessed toward the front side is formed in the center of the front frame 71, and a front bearing portion 73 is constituted by the bearing 72 housed in the bearing recess 71a. .

The motor main body 62 has a substantially cylindrical field (stator) 74 fixed to the motor frame 61, and an armature (electrical element) 75 arranged inside the field 74. The armature 75 is rotatably supported by a front and rear bearings 73 and 66 with a rotor shaft 76 provided at the center of the shaft.

Further, a pair of brush mechanisms 77 as protrusions are fixed to the motor frame 61 with screws 78. Then, each brush mechanism 77 has a carbon brush 78 that is in sliding contact with a commutator 75a provided on the armature 75, and a brush holder 79 that holds the carbon brush 78. The brush holder 79 has a longitudinal direction. The rotor shaft 76 is supported in a direction substantially orthogonal to the axial direction of the rotor shaft 76, and is partially supported outside the motor frame 61.

The carbon brush 78 is pressed by the brush holder 79 and slidably contacts the commutator 75 a, so that the carbon brush 78 and the commutator 75 a are electrically conducted to each other. .

On the other hand, a current plate 81 is fixed to the front side of the front frame 71 with screws 82. Furthermore, a fan 84 is arranged in front of the current plate 81. The fan 84 is sandwiched by washers 87, 87 by a sleeve 85 fitted to the rotor shaft 76 and a hexagonal nut 86 screwed to a screw part 76a formed at the tip of the rotor shaft 76. It is fixed to the tip of the armature 75.

Further, a fan cover 88 having a substantially cylindrical shape is fitted to the outer peripheral portion of the flange portion 61b of the motor frame 61, and the fan cover 88 covers the fan 84. The fan cover 88 has a suction port 88a formed in the center of the front surface, and a rear opening 88b formed in the entire rear surface.

Then, the sound insulating plate 38 is fitted to the motor frame 61 in a state of being closely attached to the rear end portion of the fan cover 88 and covering the rear opening portion 88b of the fan cover 88.

As shown in FIGS. 1 to 3, the sound insulating plate 38 has a substantially annular plate shape and is made of high-density paper or the like. A fitting hole 91 that fits into the outer peripheral portion of the motor frame 61 is formed in the sound insulating plate 38. The outer diameter of the fitting hole 91 is the outer diameter of the outer peripheral portion of the motor frame 61. The dimensions are almost the same. The outer diameter of the sound insulating plate 38 is larger than that of the fan cover 88.

Further, the sound insulating plate 38 is formed with a pair of cutouts 92 that communicate with the fitting holes 91 and face each other, and has a bendable tongue-like shape that covers the cutouts 92. A lid piece portion 94 is formed. That is, each notch portion 92 and each lid piece portion 94 form two cut lines 95, 95 communicating with the fitting hole 91 in the sound insulating plate 38 in parallel with each other, and these two cut lines A perforation 96 formed by a chain line cut is formed between the tip ends of the cut line 95. In addition, the distance between the two score lines 95, 95 forming a pair is set to be slightly larger than the width dimension of the brush mechanism 77 protruding to the outer peripheral portion of the motor frame 61, and the length of each score line 95. The height dimension is set to be slightly larger than the protruding dimension of the brush mechanism 77 protruding to the outer peripheral portion of the motor frame 61.

The sound insulating plate 38 is pushed in from the rear end side of the electric blower 32 with the fitting hole 91 fitted in the motor frame 61, and is brought into close contact with the rear end portion of the fan cover 88. The fan cover 88 is held so as to cover the rear opening 88b.

Further, in the process of fitting the sound insulation plate 38 to the motor frame 61, by aligning each notch 92 and the brush mechanism 77, each lid piece 94 abuts on the brush mechanism 77. In this state, the lid pieces 94 are bent from the perforations 96 to open the notches 92, and the sound insulation plate 38 passes through the brush mechanism 77 in a state where the brush mechanisms 77 pass through the notches 92.

Subsequently, when the sound insulating plate 38 is pushed in and the sound insulating plate 38 is brought into close contact with the rear end portion of the fan cover 88, each lid piece portion 94 is bent from the perforations 96 as shown in FIG. Therefore, the lid pieces 94 are pushed in with a finger or the like so as to be flush with the other portions of the sound insulating plate 38, and the notches 92 are closed, as shown in FIG.

As described above, in the vacuum cleaner using the general and inexpensive electric blower 32 having the brush mechanism 77 having the carbon brush 78, a part of the brush mechanism 77 is located at the outer peripheral portion of the motor frame 61. According to the electric vacuum cleaner of the present embodiment, the notches 92 of the sound insulating plate 38 and the brush mechanism 77 are aligned with each other, and the sound insulating plate 38 is fitted into the motor frame 61. The lid piece portion 94 comes into contact with the brush mechanism 77 and bends, so that the sound insulating plate 38 can be easily brought into close contact with the rear side portion of the fan cover.

Then, with the sound insulation plate 38 being in close contact with the rear side of the fan cover 38, the lid pieces 94 are pressed to be flush with the other parts of the sound insulation plate 38, so that these lid pieces are The notch 92 can be easily closed by the portion 94.

Therefore, since the notch 92 that is the opening of the sound insulation plate 38 is closed by the lid piece 94, a high-frequency whistling noise of, for example, about 4.5 kHz is generated while the fan 84 is rotating. However, the sound generated by the electric blower 32, such as the noise of the feathers, leaks through the gap between the fan cover 88 and the flange 61b of the motor frame 61, the screw hole 67 formed in the flange 61b, and the like. However, the sound of the feathers can be effectively blocked by the sound insulating plate 38, and the electric vacuum cleaner can be made even quieter.

Further, a general and inexpensive electric blower 32 having a brush mechanism 77 having a carbon brush 78 can be used, and the sound insulating plate 38 is made of high density paper or the like having a substantially annular plate shape. Since it can be easily manufactured only by forming the predetermined cut lines 95, the manufacturing cost of the electric vacuum cleaner can be reduced.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6 to 9.

In this embodiment, the electric blower 32 of the cleaner body 11 shown in FIG. 2 and the like is equipped with the first and second sound insulating plates 101 and 102.

The sound insulating plates 101 and 102 are formed of high-density paper or the like in substantially the same shape, and a fitting hole 105 that fits into the motor frame 61 of the electric blower 32 is formed in the center. In addition, the outer diameter of the fan cover 88 is larger than that of the fan cover 88.

Further, the sound insulating plates 101, 102 are formed with notch portions 106, 106 of substantially rectangular shape facing each other so as to communicate with the respective fitting holes 105, and communicate with the respective fitting holes 105. As a result, triangular auxiliary notches 107 are formed at four places. Each notch 106 is formed in a shape through which the brush mechanism 77 protruding from the motor frame 61 can be inserted, like the notch 92 of the sound insulating plate 38 of the first embodiment shown in FIG.

Further, each sound insulating plate 101, 102 is provided with two substantially U-shaped cuts at two locations, and bendable engaging pieces 108, 108 are formed. That is, these engaging piece portions 108 are cut out substantially concentrically with the outer peripheral edge portions of the sound insulating plates 101 and 102, and as shown in FIG. Is formed so as to be swingable in a state in which the other end 108b is separated from the sound insulating plates 101 and 102.

Then, as shown in FIGS. 8 and 9, in the first sound insulating plate 101 and the second sound insulating plate 102, the corresponding engaging piece portions 108 are located at the centers of the sound insulating plates 101, 102. It is formed in a symmetrical position and shape with a line passing through as a symmetry axis, and the corresponding engaging piece portions 108 are formed to face each other with the opposite end portions cut off.

Therefore, the first sound insulation plate 101 and the second sound insulation plate 102 are in close contact with each other, and the corresponding engagement piece portions 108 can be engaged with each other in a state of being rotated in the relatively opposite directions. It has become.

Further, with the engagement piece portion 108 of the first sound insulation plate 101 and the engagement piece portion 108 of the second sound insulation plate 102 thus engaged with each other, each notch of the first sound insulation plate 101 The portion 106 and each notch 106 of the second sound insulating plate 102 are held at positions displaced by about 90 degrees in the circumferential direction, and each auxiliary notch 107 of the first sound insulating plate 101 is provided. Each of the auxiliary cutouts 107 of the second sound insulation plate 102 is held in a position displaced from each other.

The sound insulation plates 101 and 102 are fitted in the fitting holes 105 into the motor frame 61 of the electric blower 32 from the rear side in order, and the brush mechanism 77 is inserted into the notches 106. It is closely attached to the rear side of the fan cover 88 and closes the rear opening 88b of the fan cover 88. Further, in this state, at least one of the sound insulation plates 101 and 102 is rotated to engage the corresponding engagement piece portions 108, so that the first sound insulation plate 101 causes the second sound insulation plate 102 to move. While each notch 106 and each auxiliary notch 107 is closed, each notch 106 and each auxiliary notch 107 of the first sound insulating plate 101 is closed by the second sound insulating plate 102.

As described above, according to the present embodiment, the first and second sound insulating plates 101 and 102 are provided, and the notch portion 10 6 into which the brush mechanism 77 can be inserted respectively. By forming the, the sound insulating plates 101 and 102 can be easily attached to the rear side of the fan cover 88. Further, the sound insulation plates 101 and 102 are easily positioned and rotated by rotating at least one of the sound insulation plates 101 and 102 and engaging the corresponding engagement piece portions 108 with each other. In this state, the notches 106 and the auxiliary notches 107 are closed to each other. Therefore, the fan noise of the fan 84 can be effectively blocked, and the electric vacuum cleaner can be made quieter.

Further, since each engagement piece portion 108 is cut out substantially concentrically with the outer peripheral edge portion of each sound insulation plate 101, 102, it is easy to rotate each sound insulation plate 101, 102 by mutual rotation. Can be engaged.

[0056]

[Effect of device]

 According to the electric vacuum cleaner of claim 1, the sound insulation plate is provided with a cutout portion into which the protrusion protruding from the motor body can be inserted, and a flexible lid piece portion capable of closing the cutout portion. Since the sound insulating plate is formed, when the sound insulating plate is fitted to the motor body, the protruding portion can be inserted into the notch while the cover piece is bent, so that the sound insulating plate can be easily attached to the rear side of the fan cover. In addition, with the sound insulation plate being in close contact with the rear side of the fan cover, the notch can be closed by the lid piece. Therefore, for example, the sound passing between the motor body and the fan cover can be effectively blocked, and the electric vacuum cleaner can be made quiet.

According to the electric vacuum cleaner of the second aspect of the present invention, since the first and second sound insulation plates are provided with the cutout portions through which the protrusions provided from the motor body can pass, When the sound plate is fitted to the motor body, the protrusions pass through the cutouts of the sound insulating plates, and the sound insulating plate can be easily attached to the rear side of the fan cover. Further, the positions of the cutouts of these sound insulation plates can be made different from each other while the sound insulation plates are in close contact with the rear side of the fan cover, and the cutouts of each sound insulation plate can be closed by the sound insulation plates. . Therefore, for example, the sound passing between the motor body and the fan cover can be effectively blocked, and the electric vacuum cleaner can be made quiet.

[Brief description of drawings]

FIG. 1 is a side view in which a part of an electric blower and a sound insulating plate are cut away, showing an embodiment of an electric vacuum cleaner of the present invention.

FIG. 2 is a sectional view of the same electric vacuum cleaner.

FIG. 3 is a front view of the sound insulation plate of the above.

FIG. 4 is a perspective view showing a step of fitting a sound insulating plate to the electric blower of the same.

FIG. 5 is a perspective view showing a state in which a sound insulating plate is fitted to the electric blower of the above.

FIG. 6 is a perspective view showing a state in which a sound insulating plate is fitted to an electric blower according to another embodiment of the present invention.

FIG. 7 is a front view of the sound insulation plate of the above.

FIG. 8 is an explanatory diagram showing a state in which the above sound insulating plates are combined.

FIG. 9 is an explanatory diagram showing a state in which the above sound insulating plates are combined.

FIG. 10 is a perspective view showing a state in which a sound insulating plate is fitted to an electric blower of a conventional electric vacuum cleaner.

[Explanation of symbols]

 32 Electric blower 38 Sound insulation plate 63 Motor body 77 Brush mechanism as a protrusion 84 Fan 88 Fan cover 91, 105 Fitting hole 92, 106 Cutout 94 Lid piece 101 First sound insulation plate 102 Second sound insulation plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Takeshi Sato 43 Horiyamashita, Hadano City, Kanagawa Prefecture Tokyo Electric Co., Ltd. Hadano Factory

Claims (2)

[Scope of utility model registration request] 1. An electric blower and a sound insulating plate for cutting off the sound generated by the electric blower, wherein the electric blower is provided with a substantially cylindrical motor main body and a part of an outer peripheral portion of the motor main body. And a fan cover arranged on the front side of the motor body and driven to rotate by the motor body, and a fan cover that covers the fan and has a diameter larger than the motor body. The plate has a fitting hole that fits into the outer peripheral portion of the motor body, and the sound insulation plate is provided on the rear side of the fan cover with the fitting hole fitted into the outer peripheral portion of the motor body. In a vacuum cleaner in close contact with a portion, the sound insulation plate is formed with a cutout portion into which the protrusion can be inserted, and a flexible lid piece portion that can close the cutout portion. Vacuum cleaner to do. 2. An electric blower and first and second sound insulating plates for cutting off sound generated by the electric blower, wherein the electric blower has a substantially cylindrical motor main body and an outer peripheral portion of the motor main body. A projection part provided in a part of the motor main body, a fan arranged on the front side of the motor main body part and driven to rotate by the motor main body part, and a fan cover having a larger diameter dimension than the motor main body part covering the fan. And each of the sound insulating plates has a fitting hole that fits into the outer peripheral portion of the motor body, and these sound insulating plates are fitted into the outer peripheral portion of the motor body through the fitting holes. In the electric vacuum cleaner which is in close contact with the rear side of the fan cover in the state, notches are formed in the sound insulation plates, through which the protrusions can be inserted, and these sound insulation plates are provided on the rear side of the fan cover. In close contact, these Tone plates made different from each other the position of the notch of the electric vacuum cleaner, characterized in that closing the respective cut-out portions by mutual sound insulating plate.