JPH0732743B2 - Vacuum cleaner - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electric vacuum cleaner having a soundproof structure.

2. Description of the Related Art Conventionally, an electric vacuum cleaner as shown in FIG. 4 is known.
The air flow of the electric vacuum cleaner passes from the intake port 1 through the primary filter 2, the secondary filter 3 and the electric blower 4 to the exhaust passage 6 between the electric blower 4 and the cord winder 5. It was discharged from the flow exhaust packing 7 to the outside of the main body. The exhaust passage 6 constitutes a bypass with a soundproof wall 8.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-described electric vacuum cleaner, the sound of wind generated from the electric blower 4 and the sound of wind passing through the main body are high, and exhaust air is bypassed by the soundproof wall 8 or the like inside the main body to directly Although it was devised not to exhaust it, as can be seen from the frequency analysis diagram in Fig. 5, the noise was still high and the noise reduction was one of the major improvements.

The present invention solves the above problems, and provides a vacuum cleaner that employs a soundproof structure having a simple structure to reduce noise.

Means for Solving the Problems A technical means of the present invention for achieving the above object is to wind a cord by providing a plurality of holes in a partition wall of a main body having a cord winding device facing an exhaust passage of an electric blower. The exhaust sound is reduced by the muffler effect by using the closed cord storage space that accommodates the device as a muffling space.

Action This technical means acts as follows. That is, the exhaust noise generated in the electric blower and the exhaust passage is silenced by generating a muffler effect by a plurality of holes provided in the partition wall of the main body to which the cord winder is attached and the cord storage space containing the cord winder. To do. Also,
The sound that has entered the cord storage space is attenuated by a member such as a cord winding device arranged inside the cord storage space, and the sound leaking from the cord storage space to the outside is drastically reduced to realize low noise.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
In FIG. 3 to FIG. 3, 10 is an electric blower, which is a front support rubber 11
Also, the cleaner body 13 is partially surrounded by the soundproof wall 14 formed integrally with the cleaner body 13 by the support rubber rear 12.
It is stored inside. 10 'is a motor exhaust port. 15
Is a cord winding device for winding the cord 16, and a shaft 17 of the cord winding device is rotatably attached to a main body partition wall 18 by an attaching screw 19. 20 is a contact for power supply.

The main body partition wall 18 is supported by front and rear supporting ribs 21 and 22 integrally formed with the cleaner main body 13, and the electric blower 10 is provided.
The inside of the vacuum cleaner body 13 is partitioned by the cord winding device 15. The shaft 17 of the cord winding device 15 is supported by a support rib 23 on the side opposite to the main body partition wall 18. 24 is a hole provided in the main body partition wall 18, and a plurality of holes are provided.
Behind 24, sound absorbing material 25 is attached to felt or the like.
Reference numeral 26 is a cord storage space that accommodates the cord winding device 15, and is communicated with the exhaust passage 27 of the electric blower 10 by the hole 24 of the main body partition wall 18 facing this passage.

28 is a power supply circuit component. 29 is a main body handle. 30 is an intake port provided in the cleaner body 13, 31 is a main filter, 32 is a secondary filter, and 33 is an exhaust port communicating with the exhaust passage 27.

Here, the air flow enters from the intake port 30 through the main filter 31, the secondary filter 32, the exhaust port 10 ′ of the electric blower 10 through the exhaust passage 27, and the exhaust port 33 as shown by the arrow. It is discharged outside the body.

The exhaust air from the electric blower 10 is, as shown by the arrow, a main body partition wall to which the electric blower 10 and the cord winding device 15 are attached.
The air is exhausted through the space 18 and the hole 24 and the cord storage space 26 provided in the main body partition wall 18 at this time become a kind of silencer to reduce exhaust noise. In this study, about 70 holes 24 of φ5 to φ8 were provided, and t5 felt was attached as the sound absorbing material 25 to the back surface, whereby the noise level of the air cleaner was reduced by about 2 dB. The frequency analysis chart is shown in FIG. As is clear from this figure, the noise around 1000Hz to 5000Hz is reduced and the overall noise is also reduced compared to the conventional one. If the sound absorbing material 25 is not provided, about half the effect is produced.

Effects of the Invention As described above, according to the present invention, the noise that is a problem of the electric vacuum cleaner, using the main body partition wall, without using a separate component,
Further, it can be effectively reduced without deteriorating the performance. In addition, the sound that has entered the cord storage space is attenuated by a member such as a cord winding device disposed inside the cord storage space, and the sound leaking from the cord storage space to the outside can be drastically reduced to realize low noise. it can.

[Brief description of drawings]

FIG. 1 is a plan view showing a part of the whole embodiment of the present invention in partial cross section, FIGS. 2 (A) and 2 (B) are plan views and cross sectional views of the main part, and FIG. FIG. 4 is a frequency analysis diagram of the electric vacuum cleaner of FIG. 4, FIG. 4 is a plan view showing a conventional example partially in cross section, and FIG. 5 is a frequency analysis diagram of the conventional electric vacuum cleaner. 10 …… electric blower, 15 …… cord winder, 18 ……
Main body partition, 24 …… hole, 25 …… sound absorbing material, 26 …… cord storage space, 27 …… exhaust passage.

Front page continuation (72) Inventor Izumi Yamaura 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References U)

Claims (2)

[Claims] 1. A main body partition is provided between the electric blower and the cord winder installed in the main body of the vacuum cleaner so as to partition the interior of the main body of the cleaner, the main body partition facing the exhaust passage of the electric blower and the cord. An electric vacuum cleaner in which a winding device is attached, and a plurality of holes are provided in the partition wall of the main body so as to communicate with a closed code storage space for storing the cord winding device and the exhaust passage. 2. The electric vacuum cleaner according to claim 1, wherein the hole of the partition wall of the main body is covered with a sound absorbing material.