JPS6353809B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an upright vacuum cleaner, and more particularly to a suction port height adjustment mechanism for an upright vacuum cleaner for carpets.

[Conventional technology]

In conventional upright type vacuum cleaners, the height of the dust inlet, which is installed at the bottom of the suction part on which the main body is tilted, can be adjusted by moving the front wheel attached to the suction part up and down. It was done.

[Problem to be solved by the invention]

If the wheel is lowered and the intake port is set to the lowest position and brought close to the floor, the height of the wheel will become unstable due to deflection of the front wheel axle, etc., and the intake port will become too low, causing it to touch the floor. It has the disadvantage that it comes in contact with the air and damages the floor surface and inlet.

The purpose of the present invention is to solve the above-mentioned drawbacks and to provide an upright type that can stably maintain the lowest height of the dust inlet when the height of the dust inlet is set to the lowest level with respect to the floor surface. Our goal is to provide vacuum cleaners.

[Means to solve the problem]

The present invention includes a suction case portion having a dust inlet provided at the front of the bottom, a front wheel provided close to the rear of the dust inlet, and a rear wheel provided at the rear of the bottom. A body case part is installed on the upper surface so as to be tiltable and has a motor chamber, a dust collection chamber, an operation handle, etc., and the suction case part moves close to the surface to be cleaned, thereby sucking in dust from the suction port. In an upright type vacuum cleaner, the front wheel is rotatably attached to the tip of the bent part of an axle having bent parts at both ends, and the bent part in the center of the axle, which is biased upward by a spring, has a height of A notch is formed in the bulkhead of the intermediate platform at the position where the front wheel is at its lowest point, and the support shaft is in contact with the adjustment cam having a step directly connected to the adjustment knob, and the support shaft is supported by the notch at both ends of the axle. It is provided in the mouthpiece case.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are perspective views showing an overview of an embodiment of an upright type vacuum cleaner of the present invention.
The main body case part 1 is tiltably erected on the mouthpiece part 2, and a handle 3 is attached to the upper part. A cord reel chamber 5 for storing a cord 4 is formed in the upper part of the main body case part 1, and a cord winding reel button 6 and a power switch 7 are provided in the upper part. The central part of the main body case part 1 is a dust collection chamber 8 with a built-in filter, and this dust collection chamber 8 has a lid 10 that can be attached and detached with a clamp 9.
The lid 10 is covered with a dust meter 11. The lower part of the main body case portion 1 is a motor chamber 12 in which a dual-purpose motor for driving a fan and a rotating brush is housed, and an exhaust port 13 is provided here.

The suction part 2 is covered by a suction case 14, and a bumper 15 is attached to the outer periphery of the suction part 2. On the front side thereof, there is a switching lever 16 for turning on and off the drive of a rotating brush, which will be described later, and for adjusting the height of the dust intake port, which will be described later. An adjustment knob 17 is provided. or,
This suction part 2 is provided with a lock pedal 18 at the rear thereof for unlocking the tilting movement of the main body case part 1 and the suction part 2, and also communicates with the suction port formed inside this suction part 2. Duct hose 19
The other end of the duct hose 19 is connected to the dust collection chamber 8. Further, a rear wheel 20 is provided on the rear lower surface of the mouthpiece 2, and a handle 21 for carrying is provided on the back surface of the main body case 1.

FIG. 3 is a bottom view of the bottom of the mouthpiece with the bottom plate covering the bottom removed. A rotating brush chamber 22 is formed in the front part of the mouthpiece case 14, and a rotating brush 23 is rotatably attached therein, and this rotating shaft is attached to one end of the rotating shaft to which the rotating brush 23 is fixed. Driving pulley 24
An idler 25 is attached which rotates idly with respect to this rotating shaft. A belt 28 is suspended between the pulley 24 and the drive shaft 27 of the motor 26 installed in the motor room 12, and when the drive shaft 27 of the motor 26 rotates, the rotating brush 23 is rotated through the pulley 24. Rotate. An arm 29 is provided adjacent to the belt 28, and this arm 29 is connected to the aforementioned switching lever 16. By operating this switching lever 16, the belt 28 is moved from the pulley 24 side and suspended on the idler 25. In this state, the idler 25 idles and the rotating brush 23 stops rotating.

The axle 30 of the rear wheel 20 is a pair of left and right frames 3
This frame 31 is fixed to the mouthpiece case 14 with screws 32.
The main body case portion 1 is attached to the frame 31 so as to be tiltable, and therefore can also be tilted relative to the mouthpiece case 14. Further, a duct 33 connecting the rotating brush chamber 22 and the duct hose 19 is inserted into the frame 31 on one side. Further, a belt chamber 34 in which the belt 28 and the like are stored is formed in the frame 31 on the other side, and this belt chamber 34 is covered with a belt cover 35. A floor brush 36 is arranged at the rear edge of the rotating brush chamber 22, and the floor brush 36 is structured to protrude from the bottom surface when the switching lever 16 is switched to the idler 25 side. An intermediate stand 38 fixed to the suction case 14 with screws 37 or the like is disposed on the rear side of the floor brush 36, and this intermediate stand 38 supports a front wheel 39 which is connected to both ends of a front wheel 39 bent into a crank shape. axis 40
is rotatably supported by a metal fitting 42 fixed with a screw 41. A bent portion 43 is formed at the end of the support shaft 40, and a front wheel 44 is rotatably attached to the tip of this bent portion 43.

4 is a cross-sectional view taken along the line 3 in FIG. 3, and FIG. 5 is a sectional view taken along the line 3 in FIG. As can be seen from these figures, the front wheel 39 has an inverted dogleg shape that opens forward when viewed from the side, and the upper side of this dogleg is a central bent part parallel to the support shaft 40. 45, bent portions 43 at both ends whose lower sides are parallel to the support shaft 40;
It is. The front wheels 44 are rotatably attached to the bent portions 43 at both ends. The front wheel 39 is biased upward by a spring 46 shown in FIG. 3, and the front wheel 39 is moved up and down by a height adjusting cam 47 having a step that abuts a central bending portion 45. This height adjustment cam 47 is connected to an adjustment knob 17 on the top surface of the suction case 14, and rotates together with the adjustment knob 17 when the adjustment knob 17 is operated.The bent portion 45 in contact with the bottom surface is shown in FIG. spring 46
By moving it up and down against the
3 is moved up and down, and the front wheels 44 are made to emerge and retract from the wheel holes (not shown) in the bottom plate 48. Note that the bottom plate 48 covers the bottom of the mouthpiece case 14.

Intermediate platform 3 through which bent portions 43 at both ends of front wheel 39 pass
The partition wall (supporting member) 49 formed in 8 has
As shown in FIG. 5, when the height adjusting cam 47 is set so that the front wheel 44 is at its lowest position, the notch 50 is provided so that the bent portions 43 at both ends substantially abut. That is, the front wheel 44 is connected to the mouthpiece case 14.
When it is sunk the most to the side, the support shaft 40 that supports it
is supported by the notch 50, completely preventing the front wheel 44 from wobbling due to deflection of the support shaft 40 or the like. Note that reference numeral 51 in FIGS. 4 and 5 is a rotating shaft to which the rotating brush 23 is fixed.

Returning to FIG. 3, a shaft 52 is fixed to the inner surface of the intermediate stand 38, and a lift arm 53 rotatably supported by the shaft 52 extends rearward. This lift arm 53 is connected to the main body case part 1.
As shown in FIG.
The center bent part 45 of the front axle 39 is pushed down, causing the front wheel 44 to protrude from the bottom surface, and the dust inlet 54 and rotating brush 23 to be placed higher than the floor. .

To clean with the upright type vacuum cleaner of this embodiment, adjust the height adjustment knob 17 of the suction port 54 according to the type of floor surface or carpet to be cleaned, and adjust the height of the suction port 54. Set. Next, the switching lever 16 is switched depending on whether or not the rotating brush 23 is necessary.
Tilt the main body case part 1 with respect to the mouthpiece part 2, and with the power switch 7 turned on and the motor 26 rotating, hold the handle 3 and move it back and forth. Dust is removed from the rotating brush chamber 22, duct 33, and duct hose 19.
The clean air is collected in the dust collection chamber 8 and discharged from the exhaust port 13.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below. The height adjustment knob 17 on the upper part of the adjustment cam 47 is made to protrude from the upper part of the suction case 14.
By rotating 7, the step of the adjusting cam is changed to bring it into contact with the bent portion 45 of the axle, thereby adjusting the height of the wheel. When the bent portions 43 at both ends of the front axle 39 that pivotally support the front wheels 44 are in the state where the front wheels 44 are sunk the most toward the mouthpiece case 14 side, the notches 50 formed in the partition wall 49 of the intermediate platform 38 By supporting this bent part 43 by making it contact with the front axle 39, even if some load is applied to the front axle 39 and the front wheel 44 is further sunk into the mouth case 14 side due to the bending of the front axle 39, etc. Since the cutout portion 50 supports the bent portion 43 of the front axle 39, the front wheel 44 does not sink any further into the intake case 14 side, and the height of the intake port 54 relative to the floor is always maintained. This has the effect of stably holding a predetermined object, and has the effect of preventing the bottom plate 48 near the suction port from coming into contact with the floor surface and damaging the suction port 54 or the floor surface.

As described above, according to the upright type vacuum cleaner of the present invention, the support member that supports the front wheel support shaft that adjusts the height of the dust inlet relative to the floor surface when the inlet is at the lowest level is provided. By providing this, the height of the lowest suction port can be stably maintained.

[Brief explanation of drawings]

1 and 2 are perspective views showing an overview of an embodiment of the upright type vacuum cleaner of the present invention, FIG. 3 is a bottom view seen from the direction of FIG. 1, and FIG.
FIG. 5 is a cross-sectional view of FIG. 3. DESCRIPTION OF SYMBOLS 1...Body case part, 2...Suction part, 3...Handle, 8...Dust collection chamber, 12...Motor chamber, 14
... Suction case part, 17 ... Height adjustment knob, 3
8...Intermediate platform, 39...Front axle, 40...Support shaft, 43...Bending portion, 44...Front wheel, 45...
Central bent part, 47... Height adjustment cam, 49...
... Bulkhead, 50 ... Notch, 54 ... Inlet.

Claims (1)

[Claims] 1 Equipped with a suction case part having a dust inlet provided at the front of the bottom, a front wheel provided close to the rear of the dust inlet, and a rear wheel provided at the rear of the bottom; The upright type is provided with a main body case part that is freely erected and has a motor chamber, a dust collection chamber, an operation handle, etc., and the suction case part moves close to the surface to be cleaned to suck in dust from the suction port. In a vacuum cleaner, a front wheel is rotatably attached to the tip of the bent portion of an axle having bent portions at both ends, and the bent portion at the center of the axle is biased upward by a spring.
A support shaft that comes into contact with an adjustment cam having a step directly connected to a height adjustment knob, has a notch formed in the bulkhead of the intermediate platform at the position where the front wheel is lowest, and supports the bent portions at both ends of the axle by the notch. An upright type vacuum cleaner characterized in that the suction case is provided with: