JPS62139620A - Small rechargeable vacuum cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a compact rechargeable vacuum cleaner, and relates to a structure in which an exhaust window is located on a side wall surface of an inclined portion in front of the handle.

[Conventional technology]

The exhaust window of conventional small rechargeable vacuum cleaners was located on the flat or circular arc side wall of the electric blower.
This prevents the exhaust air from the blower from coming into contact with the rear bulkhead of the electric blower room, taking a detour, and then being discharged outside the machine through the exhaust window on the side wall.

The swirling flow causes abnormal exhaust noise, which increases the noise level, and the bending of the exhaust flow path increases exhaust resistance, resulting in a decrease in suction output and lower suction performance.

[Problem that the invention seeks to solve]

In order to eliminate the above-mentioned drawbacks, the present invention provides a rechargeable vacuum cleaner that improves suction output and reduces noise by reducing exhaust pressure loss by making the exhaust flow path leading to the exhaust window smooth. The purpose is to provide.

That is, if the exhaust window is positioned perpendicularly or obliquely to the exhaust window sent out from the electric blower, the exhaust flow path resistance will inevitably be reduced.

Therefore, the above-mentioned improvement in suction output and reduction in noise are realized.

[Means for solving problems]

In order to achieve the above object, the present invention forms an exhaust window having a plurality of windows on the inclined surface as an inclined surface with a narrowed side wall shape from the rear end of the diffuser of an electric blower to the front part of the handle opening. Since the exhaust window is located obliquely to the exhaust air from the diffuser, the exhaust flow flows without any resistance, resulting in less exhaust resistance and a configuration in which swirling of the exhaust air is less likely to occur.

[Effect]

According to the configuration of the present invention, the exhaust air from the blower of the electric blower passes through the exhaust window in a straight line, so the exhaust flow path can be simplified and the area of the exhaust window can be reduced. This can prevent the rotational vibration sound from directly transmitting.

〔Example〕

Embodiments of the present invention will be described below with reference to one drawing.

1 to 3, a small rechargeable vacuum cleaner 2 includes a main body case 6 containing an electric blower 4, and a dust collection case 8 detachably attached to the main body case 6.

A filter 10 is provided inside the dust collection case 8. The filter 10 includes a filter material 11 such as a nonwoven fabric, a support frame 12 made of synthetic resin that supports the filter material 11 in a substantially box shape, and the support frame 12 and a backing 13. A handle 14 for pulling out the filter 10 from the dust collection case 8 is integrally formed on the backing 33. The backing 13 includes a dust collection case 8 and a main body case 6.
It has a lip that comes into contact with the joining surface 16 on the main body case 6 side and a lip that comes into contact with the inner wall of the dust collection case 8 when they are combined. The airtightness between the dust collection case 8 and the main body case 6 is maintained.

A suction port 18 is formed at the tip of the dust collection case 8.

A valve 19 made of an elastic member is attached to the suction port 18 using two holes legs 20 integrally formed on the inner wall of the dust collection case 8. Dust collection case 8 and main body case 6 are one tail cylinder device 22
It is removably attached. The buckle device z2 includes a locking piece 24 rotatably provided on the top surface of the dust collection case 8 around a shaft 23, a locking claw 26 formed on the connecting surface 16 of the main case 6, and A spring 27 is provided that applies a biasing force to rotate the locking piece 24 in the direction in which the locking piece 24 is locked to the claw 26. A locking protrusion 28 is provided at the lower part of the opening of the dust collection case 8 7 A locking protrusion 28 is provided at the lower part of the coupling surface 16 of the main body case 6
A receiver part 30 is provided for receiving the receiver. A lattice-shaped inlet 32 is provided at the center of the coupling surface 16 of the main body case 6.

A handle 34 is formed on the upper surface of the main body case 6.

A manual changeover switch 36 for starting and stopping the electric blower 4 is provided on the top surface of the main body case 6 in proximity to the handle 34.

The main body case 6 has a structure that can be divided into left and right parts. At the lower part of the main body case 6 is a chamber 39 that forms a chamber 39 for storing a storage battery 38 such as a sealed lead acid battery.
A printed circuit board 40 constituting a single charge/discharge circuit is provided above. The printed circuit board 40 is equipped with diodes, resistors, and the like for converting alternating current into direct current. The storage battery 38 is taken in and out of the room 39 by removing a lid 41 provided at the lower part of the rear wall of the main body case 6.

The connecting surface 16 between the main body case 6 and the dust collection case 8 is connected to the locking claw 2.
The receiver 6 is inclined so that the receiver 30 is also located forward. The rear surface 7 of the main body case 6 stands up at an angle of approximately 90 degrees with respect to the bottom surface of the main body case 6. A bottom cover 12 of the charging device 1 is provided on the rear surface of the rear surface 7 of the main body case 6.
A hemispherical protrusion 5 is provided to be engaged with a retaining protrusion 16 provided in the.

The electric blower 4 includes a motor 4a and a fan 4b rotated by the motor 4a, which are supported via a diffuser 4C. The exhaust flow from the fan 4b is directed to the diffuser 4
The motor 4 passes through the inlet port 4d of C and passes through the return pen 4e.
After being cooled, the air is discharged to the outside of the machine through exhaust windows 42 provided on the left and right sides of the main body case 6 through an exhaust filter 43.

The exhaust window 42 is formed in an inclined wall surface 46a that slopes from the rear i4c' of the diffuser 4e to the opening wall 44 in front of the handle 34, so that the exhaust air flows smoothly. That is, to explain using FIG. 4 in conjunction with FIGS. 1 to 3, the suction airflow generated by the rotation of the fan 4b is
The dust on the surface to be cleaned is sucked through the filter 10 in the dust collection case 8 through the suction port 18, and the dust is removed from the dust case 8 and the filter 1.
Dust is collected between 0 and 0. The dust-containing exhaust flow (d) The clean exhaust flow that has been filtered by the filter 10 passes through the fan 4b, the diffuser 4C exhaust flow inlet 4d, the lJ turn pen 4d, and passes through the exhaust flow path 48''t to the exhaust filter 43. , and reaches the exhaust window 42. Here, in the structure of the exhaust window 42 having an inclination as in this embodiment, the exhaust flow (indicated by the arrow in the figure) that has passed through the return pen 4e flows almost linearly, so that the exhaust resistance loss is reduced. Therefore, when the conventional exhaust window 42 shown in FIG. A vortex is generated on the rear wall surface 50 of 4a,
Since it is difficult for the exhaust flow to smoothly pass through the exhaust filter 43, various problems occur.

That is, the exhaust gas vortex noise occurs due to head closure and exhaust resistance loss increases, resulting in a decrease in suction output and deterioration in suction performance. In the case of the above-mentioned embodiment, such conventional interlayer formation is less likely to occur, and an increase in suction output is expected, thereby improving suction performance.

The outer periphery of the diffuser 4C of the electric blower 4 is press-fitted and supported by a mounting lip 52 of the main body case 6 via a backing 4f.

For small rechargeable vacuum cleaners, it is necessary to have a product structure that is easy to handle, and due to restrictions such as product weight and external dimensions, the suction output is determined by the outer diameter of the fan 4b of the electric blower 4 and the outer diameter of the diffuser 4C. Compared to a general vacuum cleaner, the open air volume is about 1/2, and the maximum vacuum level is 115 to 1/7.
Naturally, if the exhaust resistance increases even slightly, it will have a considerable effect on the suction output K. This embodiment takes this point into consideration and is designed to suppress the reduction in suction output. be. Therefore, the suction output of a conventional small rechargeable vacuum cleaner, that is, the suction power, was around 3W, but in this example, the suction power was about 5 to 6W, which is about twice as much as the power, and the maximum degree of vacuum is 200mm. It has nearly twice the performance of HxO and conventional products, and has a highly practical function for cleaning the inside of a car, even relatively heavy objects such as pebbles can be sucked in without any problems. Furthermore, by having a smooth exhaust flow path structure as in this embodiment, there is no need to provide a member such as a deflection plate for providing a flow rectification effect in the exhaust flow path 48, so that the mold can be simplified. Furthermore, in terms of ease of assembly, there is no obstructive member such as a deflection plate, making it easier to bundle electrical wiring.

〔Effect of the invention〕

According to the present invention, since the exhaust flow is naturally rectified, there is less exhaust resistance loss due to eddy loss, etc., and therefore the suction output is improved and even heavy dust can be sucked in without any problem, making it suitable for small rechargeable vacuum cleaners. The use of the caster has been expanded and it has become an excellent caster. Furthermore, it has the effect of reducing sound absorption and does not cause discomfort to customers due to noise.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a sectional view of a small rechargeable vacuum cleaner, Fig. 2 is a top view, Fig. 3 is a developed view, and Fig. 4 is an enlarged cross-sectional view of main parts. , FIG. 5 is an enlarged cross-sectional view of a main part showing a conventional example. 4... Electric blower, 6... Main body case, 8... Dust collection case, 4c... Diffuser, 40'... Diffuser rear end, 10... Dust collection filter, 18...
Suction port, 22... Buckle device, 34... Handle, 4
2...Exhaust window. 46a... Slanted wall surface.

Claims (1)

[Claims] 1. Printed circuit board with electric blower and charging/discharging function,
A handle is formed at the rear of the main body case containing the storage battery and the switch, and a dust collection case having a dust collection filter and suction port is detachably connected to the main body case via a buckle device at the front of the main body. A small rechargeable vacuum cleaner characterized in that the electric blower has an inclined wall surface from the rear end of the diffuser to the front of the handle, and an exhaust window is formed in the inclined wall surface.