JPS6223425Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a soundproofing device for a vacuum cleaner.
Improves the soundproofing effect, and also improves the electrical safety of the soundproofing material.
It has improved safety against fire.

Conventionally, in order to reduce the noise of a vacuum cleaner, a breathable urethane foam, felt, etc. was wrapped around the outer periphery of the motor side of an electric blower to reduce the noise generated from the electric blower. Attempts were made to reduce noise by smoothing the ventilation passages to reduce noise caused by turbulence, or by installing soundproofing materials such as urethane foam in the area where the air is exhausted to the outside of the vacuum cleaner. However, when a sound insulating material such as urethane foam or felt is wrapped around the outer periphery of the motor side of an electric blower, the sound insulating material comes into contact with the brush parts of both poles, which are live parts, and the sound insulating material has insufficient insulation against moisture, which is not preferable. In addition, there are brushes at the air outlet of the electric blower, and the sparks generated from the brushes reach the soundproofing material, so unless special flame-retardant material is used as the soundproofing material, there is a risk of fire. It was hot.

It is an object of the present invention to provide a vacuum cleaner that can solve these problems and further improve the soundproofing effect.

In order to achieve the above object, the present invention is equipped with an electric blower having a fan in the front part and a motor part with an air outlet formed in the rear part, and there is a gap between the outside of the motor part and the rear part of the fan. The cylindrical body is covered with a cylindrical body, and an annular soundproofing material having air permeability is provided in the above-mentioned gap. A discharge passageway is formed that reaches the space formed by the periphery and the inner periphery of the vacuum cleaner body.

An embodiment of the present invention will be described below based on the drawings. In FIGS. 1 and 2, 1 is a vacuum cleaner body equipped with casters 2 and rollers 3 for movement, an intake port 4 for connecting a hose to the front part, and a handle 5, with a partition wall 6 integrated inside. It is formed. 7 is the upper part of the body, and 8 is a bottom plate fixed to the upper part 7 of the body with screws or the like. Further, 9 is a lid.
The inside of the vacuum cleaner main body 1, which is composed of the upper body 7, the bottom plate 8, and the lid 9, is partitioned by the lid 9 and the partition wall 6, and has a dust collection section 12 in which a paper bag 11 is removably attached to the air intake port 4. Subsequently, an electric blower 13 and a cord reel unit 14 are provided in series. The electric blower 13 includes a fan 15 at the front and a motor section 16 at the rear, and the motor section 16 is covered with a cylindrical body 18 with support rubber 17 interposed therebetween. In the gap formed between the cylindrical body 18 and the rear part 15a of the fan 15, an annular soundproofing material 19 having air permeability, such as felt or urethane foam, is provided. Reference numeral 20 denotes an air exhaust port provided in the motor section 16, and the exhaust gas discharged from this port is sent to the cylindrical body 18.
After that, it passes through the soundproofing material 19 and is discharged. Electric blower 13 configured in this way
In this unit, the rear cylinder 18 has ribs 22 and 2 provided on the bottom plate 8 and the upper body 7, respectively.
3, and the front fan 15 is supported by the partition wall 6 and the bottom plate 8 via the front support rubber 24, and is held within the vacuum cleaner main body at a distance from the inner wall of the main body. The cord reel unit 14 has ribs 25 and 2 provided on the upper body 7.
It is sealed and fixed by a cylindrical cover 27 which is held at a distance from the inner wall of the cover 6. The space between the inner wall of the cleaner body 1, the outer periphery of the cylindrical body 18, and the outer periphery of the cord reel unit 14 is used as an exhaust passage. Reference numeral 28 denotes a breathable rear gasket attached to the lattice-shaped rear exhaust port 29 of the cleaner body 1.

With the above configuration, the exhaust gas coming out through the exhaust port 20 of the motor section 16 of the electric blower 13 hits the cylinder 18 and does not directly hit the soundproofing material 19, so that sparks ejected from the commutator brushes hit the soundproofing material 19. There is no risk of ignition, and it is safer than conventional methods against fire. In addition, sufficient electrical insulation can be ensured without the live parts such as commutator brushes coming into direct contact with soundproofing materials such as urethane foam and felt, which have little insulation effect against moisture. Also, in the conventional case, electric blower 1
The sound was loud because a highly breathable soundproofing material was provided immediately around the exhaust port 20 in No. 3, but here there is an impermeable cylindrical body 18 around the exhaust port 20, making the exhaust passage longer. Therefore, direct sound is blocked by the wall surface of the cylindrical body 18, resulting in further noise reduction.

Next, a specific example of the soundproofing material 19 will be explained based on FIG. 3. The soundproofing material 19 can be constructed by punching out a strip of soundproofing material 19 into a strip shape, providing a longitudinal slit 30 in the center, and inserting this slit 30 into the electric blower 13. By doing this, there is no need to make a long and thin object into a ring and join the ends, and the material can be removed better and there is less loss than if the object is directly punched into a ring. Therefore, costs can be reduced.

As explained above, according to the present invention, an electric blower is provided which has a fan in the front part and a motor part with an air outlet formed in the rear part, and there is a gap between the outside of the motor part and the rear part of the fan. The cylindrical body is covered with a cylindrical body, and an annular soundproofing material having air permeability is provided in the above-mentioned gap. By configuring the exhaust passage to reach the space formed by the periphery and the inner periphery of the vacuum cleaner body, the exhaust passage from the motor section can be lengthened despite the simple configuration, and the cross-sectional area of the exhaust passage can be increased. As a result, it is possible to further reduce noise, obtain a high suction power, and improve the electrical insulation properties of soundproofing materials and the safety against fire, so the practical value is extremely great.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an external perspective view, FIG. 2 is a vertical cross-sectional view of FIG. 1, and FIG. 3 is a perspective view showing an example of soundproofing material. 1...Vacuum cleaner body, 12...Dust collection section, 13...
Electric blower, 15...Fan, 16...Motor section, 18...Cylinder body, 19...Soundproofing material, 20...Air exhaust port.

Claims (1)

[Scope of utility model registration request] Equipped with an electric blower having a fan at the front and a motor section with an air outlet at the rear,
A cylindrical body is placed on the outside of the motor section with a gap between it and the rear part of the fan, and an annular soundproofing material with ventilation is provided in the gap, and the motor section and the cylindrical body are connected to each other through this soundproofing material. A vacuum cleaner having a discharge passage extending from an annular space formed by the inner periphery of the cylinder to a space formed by the outer periphery of the cylinder and the inner periphery of the vacuum cleaner body.