JPH1156694A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact, lightweight, and quiet vacuum cleaner by exhausting the exhaust air of an electric blower through an exhaust passage formed by a sound absorbing material, providing a space between the sound absorbing material and a lower case, and reducing a cross-sectional area of the exhaust passage by the sound absorbing material and a rear lower part of an electric blower storage chamber. SOLUTION: A rear lower part of an inner case 151 which forms an electric blower chamber 107 is formed into a substantially circular arc shape, and a sound absorbing material 118 is lifted by a support body provided in a rear lower part of a lower case 101 so that a cross sectional area of an exhaust passage is reduced in the rear lower part of the inner case 151 formed into the substantially circular arc shape. The sound absorbing material 118 is held by the support body provided in the lower case 101 and a support body provided in the inner case 151, and the support body provided integrally in the inner case 151 is formed substantially in parallel with the exhaust passage so that it does not become the resistance against air stream. Consequently, the exhaust air is smoothly conducted into an exhaust port to reduce air stream sound and damp energy of exhaust air sound.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vacuum cleaner,
In particular, the present invention relates to a vacuum cleaner having a sound absorbing structure in an exhaust passage.

[0002]

2. Description of the Related Art In a conventional vacuum cleaner, exhaust air of an electric blower flowing out of an opening provided below an electric blower storage room is controlled by a sound absorbing material disposed inside an outer wall of the electric blower storage room and a lower case. The sound absorbing material is arranged so as to be discharged from the exhaust port through the formed exhaust flow path, and the sound absorbing material is disposed at the rear lower part of the lower case without leaving a space on the inner surface of the lower case, and the sectional area of the exhaust flow path is constant. Was.

[0003]

However, since the sound-absorbing material is arranged at the rear lower part of the lower case without leaving a space on the inner surface of the lower case, it is necessary to improve the sound-absorbing effect in the exhaust passage. However, there is a disadvantage that the thickness of the sound absorbing material must be increased.

Further, since the cross-sectional area of the exhaust passage is constant, sound energy cannot be attenuated, and the sound absorbing effect in the exhaust passage is only due to the sound absorbing material.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to form a small and lightweight vacuum cleaner having a quiet sound by forming an exhaust passage having a high sound absorbing effect by effectively utilizing a space in a lower rear portion of a lower case. Is to provide.

[0006]

In order to achieve the above object, the present invention is characterized in that the exhaust of the electric blower flowing out of an opening provided below the electric blower housing chamber is stored in the electric blower housing. The outer wall of the chamber and an exhaust passage formed by a sound absorbing material disposed inside the lower case are configured to be discharged from an exhaust port, and at a lower rear portion of the lower case between the sound absorbing material and the lower case. A space is provided, and a cross-sectional area of the exhaust passage is reduced at a lower rear portion of the sound absorbing material and the electric blower storage chamber.

According to the present invention, an exhaust passage having a high sound absorbing effect can be formed by effectively utilizing the space at the rear lower portion of the lower case, and a compact, lightweight, and quiet sound vacuum cleaner can be provided. .

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 3 is a perspective view showing the appearance of a vacuum cleaner according to one embodiment of the present invention.

In FIG. 3, reference numeral 501 denotes a cleaner main body in which a control circuit, an electric blower and the like are built, and 502 denotes a cleaner main body 5.
01, a hose connected to the suction port, 503 is a hose proximal end, and 504 is a tip of the hose 502 (the hose proximal end 50).
The extension pipe connected to 3), 505 is a mouthpiece connected to the extension pipe 504, 506 is a switch operating section provided on the hose hand section 503, and 507 is a first infrared light emission provided on the hose hand section 503. Part, 508 is the hose hand part 50
Reference numeral 509 denotes an infrared light receiving unit provided on the upper surface of the cleaner body, and reference numeral 510 denotes a ceiling in the room.

FIG. 1 is a longitudinal sectional view of a vacuum cleaner according to one embodiment of the present invention.

The cleaner main body 501 has a lower case 101 in front of which covers the lower part, a cover 102 which covers the front upper part, a suction port 103 provided on the cover 102, and a dust collection chamber for accommodating a dust bag. 104, an airtight holding cover 105 attached to the lid 102 with a member different from the lid 102 to maintain airtightness in the dust collection chamber 104, and the lower case 1
01 and the inner case 106, the electric blower room 10
7.

The dust collecting chamber 104 houses a dust filter 114, and the electric blower chamber 107 houses an electric blower 108 for collecting dust. This electric blower 1
A filter 109 is provided on the intake side of
It is in communication with 4. On the upper part of the inner case 106, a board storage part 111 covered with the upper case 110 is formed, and the control board 112 is stored. On the control board 112,
An infrared light receiving element 113 that receives an infrared signal emitted from the first infrared light emitting section 507 and the second infrared light emitting section 508 of the hose hand section 503 is provided. An infrared light receiving unit 509 formed of another material that transmits infrared light is provided on the upper case 110 so that an infrared signal reaches the infrared light receiving element 113. A handle 115 and a lid 102 are rotatably attached to the upper case 110. Behind the case, the cover body 116 has a screw 11
7 fixed.

Next, the operation of the vacuum cleaner according to the present invention will be described with reference to FIGS. When a vacuum cleaner user presses one of the switch operation units 506 provided on the hose hand unit 503, a signal code corresponding to the pressed switch is converted into an infrared signal as a first infrared light emitting unit 507 and a second infrared light emitting unit. Radiated from the portion 508. The first infrared light emitting unit 507 is disposed so as to face substantially vertically upward in a normal use state, and an infrared signal emitted from the first infrared light emitting unit 507 is reflected on a ceiling or a wall of a room, and reflected. The light reaches the infrared light receiving unit 509 of the cleaner main body 501.

Further, the second infrared light emitting portion 508 is disposed at the grip end of the hose hand portion so as to face substantially below the horizontal, and the infrared signal emitted from the second infrared light emitting portion 508 is Directly reaches the infrared light receiving section of the cleaner main body 501. The infrared signal that has reached the infrared light receiving unit 509 is received by the infrared light receiving element 113, and the vacuum cleaner is controlled via the control board 112.

As described above, the vacuum cleaner according to the present embodiment transmits the operation information input by the user to the cleaner main body 501 using an infrared signal to control the vacuum cleaner. , Hose 502, extension tube 50
It is not necessary to use a power supply line for 4 and the like, and the weight of the vacuum cleaner can be reduced.

As described above, the electric vacuum cleaner uses the suction airflow generated by the operation of the electric blower to remove dust sucked from the suction body 505 through the extension pipe 504 and the hose 502 to the dust collection filter 114 in the dust collection chamber 104. Collect dust. The airflow filtered by the dust collecting filter 114 is further filtered by the filter 109 to remove fine dust, and then sucked into the electric blower 108. The airflow discharged from the electric blower 108 is supplied to the electric blower room 107 through an outlet 152 at a lower portion of the electric blower room 107.
Guided outside. The exhaust gas discharged from the electric blower chamber 107 first hits a sound absorbing material 118 provided inside the lower case 101, bends about 90 degrees, and proceeds to the rear of the main body.
, And is again filtered by the exhaust filter 119 and then discharged to the outside of the main body. Here, the exhaust filter 119 is held between the cover body 116 and the filter cover 120, and the exhaust filter 119 can be easily replaced by removing the filter cover 120.

A screw 117 for fixing the cover body is provided below the handle 115. The screw 117 is
The cover member 116 is screwed through a through hole 130 provided in the cover body 116. Cover body 1
Since the 16 screw tightening portions 131 are arranged inside the upper case 110, the means for fixing the cover body 116 is not visible from the outside, and only the head of the screw is visible when the handle is lifted. is there. In addition, since the concave portion for lifting the handle 115 is formed integrally with the upper case, dust accumulated in the concave portion of the upper case 110 in which the handle 115 is stored can be easily cleaned.

Further, the cover body 116 is integrally provided with a foot portion 133 when the main body stands. Cover body 116
Is fixed by screwing the upper part and locking the lower part to the lower case 101, so that even if the main body is accidentally dropped and a strong impact is applied to the foot 133, it does not come off. When the cover 116 is removed, the fixing screws 134 of the wafer case 110 appear. For this reason, the screw is not visible from both sides of the upper and lower surfaces of the vacuum cleaner.

Further, the silencing structure will be described in detail.

It is necessary that the exhaust gas discharged from the electric blower room 107 hits an obstacle so as not to generate a fluid noise, and must be smoothly guided to the exhaust port without sharply bending the flow path. For this purpose, the inner case 151 forming the electric blower chamber 107 is formed.
The lower rear portion is formed in a substantially arc shape.

In order to attenuate the energy of the exhaust sound, it is effective to change the cross-sectional area of the exhaust flow path to compress and expand the exhaust flow. For this purpose, the sound absorbing material 118 is lifted by a support provided at the lower rear portion of the lower case 101 so that the cross-sectional area of the exhaust passage is reduced at the lower rear portion of the inner case 151 formed in a substantially arc shape. With such a configuration, the cross-sectional area of the exhaust passage can be optimized without changing the thickness of the sound absorbing material 118 or the external shape of the lower case 101, and a plate-like support integrally provided in the lower case 101. By adjusting the height and shape of the object, optimization can be performed quickly and inexpensively. Further, when the sound absorbing material is thickened, the sound absorbing effect increases, and by forming a space on the back side of the sound absorbing material, there is an effect similar to that when the sound absorbing material is thickened, but the thickness of the sound absorbing material is partially increased. This is difficult due to the high manufacturing cost, and furthermore, it may not be possible to increase the thickness of the sound absorbing material in order to reduce the size of the vacuum cleaner body. However, according to this embodiment, the space in the lower rear portion of the cleaner body is effectively used, and the space 150 is provided between the sound absorbing material 118 and the lower case 101, thereby absorbing the sound without changing the thickness of the sound absorbing material. The effect can be increased.

Next, the assembling procedure will be described. First, the sound absorbing material 118 is placed on the lower case 101, and
Assemble 51. The sound absorbing material 118 is held by a support provided on the lower case 101 and a support provided on the inner case 151. The support provided integrally with the inner case 151 is formed substantially parallel to the exhaust passage so as not to cause resistance to airflow.

With the above configuration, the energy of the sound is attenuated by repeating the expansion and compression of the exhaust flow, and the exhaust flow having a high sound absorbing effect can be formed.

[0025]

As described above, according to the present invention, since the lower rear portion of the inner case forming the electric blower chamber is formed in a substantially arc shape, the exhaust gas is smoothly guided to the exhaust port, and the air flow noise is reduced. Reduction can be measured.

The sound absorbing material is lifted by a support provided at the lower rear portion of the lower case so that the cross-sectional area of the exhaust flow channel is reduced at the lower rear portion of the inner case formed in a substantially arc shape. Compression and expansion to attenuate the energy of exhaust noise. Furthermore, by adopting such a configuration, the cross-sectional area of the exhaust passage can be optimized without changing the thickness of the sound-absorbing material or the external shape of the lower case. Since adjustment can be performed by adjusting the height and shape, optimization can be performed quickly and inexpensively.

Furthermore, the exhaust passage having the same sound absorbing effect as the thickened sound absorbing material is provided by effectively utilizing the space in the lower rear portion of the cleaner body and providing a space between the sound absorbing material and the lower case. It is possible to provide a quiet and inexpensive vacuum cleaner that can be configured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a vacuum cleaner according to one embodiment of the present invention.

FIG. 2 is a top view of the vacuum cleaner according to one embodiment of the present invention.

FIG. 3 is an external perspective view of the vacuum cleaner according to one embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of a vacuum cleaner showing a conventional example.

[Explanation of symbols]

102: lid, 104: dust collection chamber, 110: upper case, 1
12 control board, 118 sound absorbing material, 150 space, 15
1… Inner case.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Takahisa Toyoda 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Pref.

Claims (4)

[Claims] 1. A lower case in which a dust collection chamber having an opening and an electric blower storage chamber are juxtaposed, a lid covering the opening of the dust collection chamber, and the outer shell of the cleaner above the electric blower storage chamber. Wherein the exhaust of the electric blower flowing out of an opening provided below the electric blower storage chamber is arranged on an outer wall of the electric blower storage chamber and inside the lower case. An electric cleaning device configured to discharge from an exhaust port through an exhaust passage formed by the provided sound absorbing material, and to form a space between the sound absorbing material and the lower case in a lower rear portion of the lower case. Machine. 2. The vacuum cleaner according to claim 1, wherein a cross-sectional area of the exhaust passage is reduced in a lower rear portion of the electric blower storage chamber. 3. The vacuum cleaner according to claim 1, wherein a space is provided between the sound absorbing material and the lower case by a plate-like support provided at a lower rear portion of the lower case. 4. The vacuum cleaner according to claim 1, wherein a plate-like support substantially parallel to a direction in which the exhaust air flows is disposed on an outer wall of the electric blower storage chamber.