JPS6131736Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a small electric vacuum cleaner that can easily remove dust from homes, cars, etc. by rotating blades using a motor.The purpose of this invention is to To provide a small electric vacuum cleaner that can obtain stable dust suction performance by setting the gap between the outer periphery of the blade and the inner wall of the air guide excluding the notch part to be a constant ratio to the diameter of the blade.

Hereinafter, the present invention will be explained based on drawings showing embodiments thereof. In Figures 1 and 2, 1
1 is a vacuum cleaner body, and this vacuum cleaner body 1 is constructed by fitting and fixing a resin body consisting of two parts of almost the same shape together with screws (not shown), and a part has a grip part 2. Furthermore, a power switch 3 is provided in front of the grip portion 2. Reference numeral 4 denotes a chassis fitted and fixed within the vacuum cleaner main body 1, and a motor 5 is fixed to this chassis 4.
A power supply battery 6 contacts and fixes a lead 7 that constitutes a current supply circuit to the motor 5. The power switch 3 and the motor 5 are electrically connected via a lead wire 8, and the lead 7 and the motor 5 are also electrically connected via a lead wire 9. 10 is a blade fixed to the rotating shaft 5a of the motor 5; 11 is an air guide for efficiently exhausting the air generated by the rotation of the blade 10; The mating is fixed. 12 is an exhaust hole provided only on one side of the front side of the vacuum cleaner body 1; 13 is a dust case detachably attached to the vacuum cleaner body 1;
An air intake port 1 into which a dust suction nozzle (not shown) is removably fitted to one end surface of the dust case 13.
4, and inside thereof is a valve body 1 which normally closes the intake port 14 and opens the intake port 14 by the flow of air.
5 is fixed. 16 is a dust storage section provided in the dust case 13, and 17 is a filter detachably attached to the opening at the other end of the dust case 13. When the dust case 13 is attached to the vacuum cleaner body 1, the filter 17 It faces the blade 10 on the cleaner body 1 side. Reference numeral 18 denotes a bottomed cylindrical battery case made of synthetic resin. This battery case 18 houses the power supply battery 6 and also fixes a lead 19 constituting an electric circuit. Reference numeral 20 denotes a lid detachably attached to the rear end of the vacuum cleaner body 1, and a spring 2 is installed inside the lid 20.
1 is fixed, and this spring 21 presses the battery case 18 toward the lead 7 side.

In the above configuration, when the power switch 3 is operated to energize the motor 5, the blades 10 rotate and the dust suction nozzle (not shown) connected to the intake port 14 is activated.
Air is sucked into the dust case 13 through the intake port 14. Therefore, when the dust suction nozzle (not shown) is directed toward the dust on the floor in order to suction and remove the dust on the floor with this small electric vacuum cleaner, the dust flows into the dust case 13 through the intake port 14 along with the air. The dust is sucked into the dust case 13
The dust is captured by the filter 17 inside and deposited in the dust storage section 16. In addition, the air sucked together with dust is transferred to the filter 17, the blade 10, and the air guide 1.
1 and is discharged to the outside from the exhaust hole 12.

Next, the exhaust hole 12, the blade 10, the air guide 11
The relationship will be explained based on FIG. 3 and FIG. 1. The air guide 11 is arranged facing each other with gaps 22 and 23 between the outer periphery and the front of the blade 10, respectively, and has a notch 24 in a part of the side wall facing the exhaust hole 12. are provided, and guide ribs 25 are integrally formed. As shown in FIG. 3, when the blade 10 rotates in the direction of the arrow A, the air generated thereby flows between the outer periphery of the blade 10 and the inner wall 11 of the air guide 11.
The air is guided to the guide rib 25 through the gap 22 between the air outlet a and the exhaust hole 12, and is discharged from the exhaust hole 12 in the direction indicated by the arrow B. In other words, since the air is exhausted in the lateral direction of the main body, the dust that is being sucked out during dust suction is not blown away by the exhaust, allowing efficient cleaning.
If exhaust holes are provided on the bottom and all around the side wall of the main body, the sucked air will be exhausted in the tangential direction of the bottom of the main body and the entire circumference of the blades, so the air will be exhausted downward from the side of the main body. The dust that is intended to be sucked is blown away, and the original dust removal function cannot be fulfilled. In this case, if the gap 22 is made smaller, the degree of vacuum will increase, but the flow rate will decrease. On the other hand, if the gap 22 is made larger, the flow rate increases, but good dust suction performance cannot be obtained even if the degree of vacuum decreases. Therefore, in the present invention, as shown in FIG. 4, the best size range of the gap 22 between the outer periphery of the blade 10 and the inner wall 11a of the air guide 11 is determined based on the diameter ratio of the blade 10. As is clear from FIG. 4, the gap 22 is 0.05% of the diameter of the blade 10.
By setting the ratio to 0.1, actual dust, such as sand grains, can be suctioned in a stable manner.

As described above, according to the present invention, the gap between the outer periphery of the blade and the inner wall of the air guide excluding the notch is
Since the ratio is set to 0.05 to 0.1 with respect to the diameter of the blade, stable dust performance can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of a small electric vacuum cleaner showing an embodiment of the present invention, Fig. 2 is a half-cut top view of the same vacuum cleaner,
FIG. 3 is a side sectional view of the main parts of the vacuum cleaner, and FIG. 4 is a characteristic diagram showing the dust performance of the vacuum cleaner. 1...Vacuum cleaner body, 5...Motor, 10...Blade, 11...Air guide, 12...Exhaust hole, 1
3...Dust case, 14...Intake port, 16...
Dust storage section, 17... Filter, 22, 23...
...Gap, 24...Notch, 25...Guide rib.

Claims (1)

[Scope of utility model registration request] The vacuum cleaner body, which has a built-in motor that rotates suction blades and has an exhaust hole on a part of the side, is placed facing each other with a gap between the outer periphery and the front of the blade. , and an air guide having a notch and a guide rib provided in a part of a side wall facing the exhaust hole, and an air guide detachably attached to the vacuum cleaner body and facing the air intake port, the dust storage section, and the blade. A small electric vacuum cleaner comprising a dust case provided with a filter, and characterized in that the gap between the outer periphery of the blade and the inner wall of the air guide excluding the notch is set to a ratio of 0.005 to 0.1 with respect to the diameter of the blade. .