JPS6232509Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an upright vacuum cleaner in which a main body case is tiltably provided on a suction case.

[Conventional technology]

This type of upright vacuum cleaner uses a mechanism that does not lock the main body case and the suction case in order to prevent the main body case from tilting at a predetermined position relative to the suction case. This locking mechanism is
It is preferable to operate with a pedal provided on the mouthpiece case. That is, a configuration in which the pedal is pressed with the foot to operate the locking mechanism and the main body case is tilted by hand is the easiest to tilt the main body case and is convenient to use.

[Problems to be solved by the invention] In the above-mentioned locking mechanism, a very large stress is generated when the pedal is stepped on with the foot, so it is necessary to make it strong enough to withstand that stress. Furthermore, even if it is strong, it is required to have excellent operability.

In view of the above points, the purpose of this invention is to
To provide an upright vacuum cleaner equipped with a locking mechanism with excellent operability.

[Means for solving problems]

The above object is to provide a main body case in which a suction case having a U-shaped cutout is tiltably fitted into the U-shaped cutout, and the interior is partitioned from the bottom into a drive chamber and a dust collection chamber; A rotating brush provided inside the mouthpiece case, a front wheel attached to an intermediate stand provided inside the mouthpiece case, a rear wheel provided at the rear of the mouthpiece case, and a rotating brush stored in the drive chamber and attached to the rotary brush. an electric blower that creates an air flow that guides the dust stirred up into the dust collection chamber in the suction case; and two wheel frames that are fixed to the suction case and hold rear wheel axles of the rear wheels; a pedal provided on the outer periphery of the mouthpiece case; and a locking arm, one part of which engages with a locking recess provided near the rotation shaft 32 of the main body case, and the other part of which is in contact with the pedal. The locking arm is disengaged from the locking recess when the pedal is pressed;
and is attached to the wheel frame so that when the pedal is released, the engagement with the locking recess is maintained by an arm spring, and the wheel frame has a suction port formed on both sides of the main body case. A rotation shaft for tilting the main body case is installed in a U-shaped notch of the case, and a bearing hole for rotationally holding the rotation shaft is bored, and the rotation shaft of the electric blower is disposed in the center of the rotation shaft. This is achieved by doing so.

[Effect]

When you press the pedal with your foot, the locking arm separates from the locking recess in the main case, allowing the rotating shaft of the main case to rotate within the bearing hole provided in the wheel frame. Tilt to the center. When the foot is released from the pedal, the locking arm is engaged and held in the locking recess by the arm spring, so that the main body case is fixed at a predetermined angle with respect to the mouthpiece case.

When the main body case tilts relative to the mouthpiece case,
Since the rotation axis of the electric blower is located at the center of the rotation axis of the main body case, the main body case can be tilted smoothly.

The rotation axis of the locking arm and main body case, which are operated by a pedal stepped on by the foot, is supported by a strong wheel frame that holds the rear wheel axle of the rear wheel. Even if a strong force is applied to the case, the structure is strong enough that the attachment state of the locking arm or the main case does not change.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

A suction case 1 of an upright vacuum cleaner has a bottom plate 2 attached to the bottom. Inside the mouthpiece case 1,
A rotating brush 4 is attached with a part exposed outward from an opening 3 provided in a bottom plate 2. The rotating brush 4 rotates by transmitting power from the electric blower 6 via the belt 5.

The main body case 7 is attached with an operating handle 8 extending upward from an upper end surface 7a, and has a concave dust collection chamber 9 in the center. The main body case 7 is attached to the mouthpiece case 1 so as to be tiltable, and is configured so that it can be stood upright on the mouthpiece case 1 when not in use.

A cleaning surface switching knob 11 of the mouthpiece height adjusting knob 10 is provided at the center of the upper surface of the mouthpiece case 1. A pedal 12 is provided on the outer periphery of the upper surface of the mouthpiece case 1.
A bumper 13 is provided on the side surface of the mouthpiece case 1. The rotating brush 4 provided inside the mouthpiece case 1 includes
A brush 14 is flocked in a spiral manner.

A driving pulley 15 fixed to the rotating brush 4 and an idling pulley 16 not fixed to the rotating brush 4 are provided at the side end of the rotating brush 4. When the belt 5 is wound around the driving pulley 15, the power of the electric blower 6 is transmitted to the rotating brush 4. When the belt 5 is wound around the idling pulley 6, the power of the electric blower 6 is not transmitted to the rotating brush 4. The electric blower 6 is installed below the dust collection chamber 9 inside the main body case 7. The end of the rotating shaft 17 of the electric motor blower 6 protrudes outward from the side surface of the main body case 7, is inserted into the mouthpiece case 1, and is wrapped around the belt 5.

A dust guide plate 19 is provided between the rotating brush storage chamber 18 of the rotating brush 4 in the suction case 1 and the inner upper wall of the suction case 1. Inside the suction case 1, adjacent to the rotating brush storage chamber 18, there is an intermediate stand 2.
Set 0. The dust guide plate 19 is formed integrally with the intermediate stand 20.

A front wheel 21 is rotatably attached to the intermediate stand 20 by a front wheel shaft 22 bent into a crank shape. A floor brush 23 is provided between the intermediate stand 20 and the rotating brush storage chamber 18. The floor brush 23 has an inclined protrusion 24 provided on its upper surface that comes into contact with an inclined protrusion 25 provided on the cleaning surface switching knob 11, and by sliding the cleaning surface switching knob 11 from side to side,
It moves up and down and enters and exits from the bottom plate 2. Front wheel 21
, the front wheel axle 22 is located at the mouth height adjustment knob 10.
By contacting the height adjustment cam 26 attached to the height adjustment cam 26 and rotating the suction height adjustment knob 10, it moves up and down and moves in and out of the bottom plate 2.

A recess 27 is formed in the center of the upper surface of the mouthpiece case 1. The recessed portion 27 accommodates the intermediate stand 20 and the rotating brush 4.
It is located above the rotary brush 4 and extends over almost the entire width of the rotating brush 4. A suction mouth height adjustment knob 10 and a cleaning surface switching knob 11 are arranged in the recess 27. Recess 2
The depth 7 is such that the top 10a of the mouthpiece height adjustment knob 10 and the top 11a of the cleaning surface switching knob 11 do not protrude from the ridge surface A of the outer surface of the mouthpiece case 1. The inner bottom surface of the recess 27 is approximately horizontal.

Inside the mouthpiece case 1, a mouthpiece duct 28 and wheel frames 31a and 31b that hold a rear wheel 30 attached to a rear wheel shaft 29 are provided. Mouthpiece dust 2
8 communicates with the rotating brush storage chamber 18 at one end, and communicates with a joint described later at the other end.

A rotation shaft 32 for tiltably attaching the main body case 7 to the U-shaped notch 1a of the mouthpiece case 1 is integrally formed on both side surfaces of the main body case 7.

The wheel frames 31a, 31b have rotation shafts 32.
A bearing hole 33 for rotationally holding the is formed. A locking recess 34 is formed on one side of the main body case 7. A locking arm 35 is rotatably attached to one wheel frame 31a by an arm shaft 36 and an arm spring 37. The locking arm 35 has one end portion 35 a in contact with the pedal 12 and the other portion engaging in the locking recess 34 . When the pedal 12 is pressed, the locking arm 35 and the locking recess 34 are disengaged, and the main body case 7 is moved against the mouthpiece case 1.
And it automatically tilts around the rotation axis 32. When the pedal 12 is released, the locking arm 35 is returned to its original state by the arm spring 37, and the locking arm 35 is locked in the locking recess 34, thereby preventing the main body case 7 from tilting relative to the suction case.

The main body case 7 is composed of three chambers: a drive chamber 38 in which the electric blower 6 is housed, a dust collection chamber 9, and a cord reel chamber 40 in which the cord reel 39 is housed.

A suction duct 42 is provided in the drive chamber 38 and communicates with the dust collection chamber 9 . A blower portion of the electric blower 6 is supported by the suction duct 42 via a first vibration isolating rubber 41 . The electric motor section of the electric blower 6 is
It is supported by the inner wall of the main body case 7 via a vibration isolating rubber 45. A sound insulating plate 47 is integrally formed with the suction duct 42 . A drive unit cover 48 for accommodating the electric blower 6 and the suction duct 42 is attached to the lower part of the main body case 1. The drive section cover 48 is provided with an exhaust port 49. Sound insulation board 4
7 is located opposite the exhaust port 49.

The inner wall of the drive chamber 38 of the main body case 1 is provided with a first rib 50a and a second rib 50b that support the blower section of the electric blower 6. The first rib 50a is in direct pressure contact with the first vibration isolating rubber 41. 2nd rib 50
b is in pressure contact with a sound insulating plate 47 formed integrally with the suction duct 42. The first rib 50a forms a gap through which the exhaust flow can pass.
The second rib 50b, unlike the first rib 50, has no gap and is designed to prevent the exhaust flow from passing through.
The exhaust flow sent into the electric motor blower 6 from the dust collection chamber 9 via the suction duct 42 passes through the electric motor blower 6, passes through the gap between the first ribs 50a and the outer circumference of the suction duct 42, and reaches the exhaust port. 49 to the outside. The electric blower 6 is provided with a sound absorbing cover 99 around its outer periphery. An after filter 100 is provided at the exhaust port 49.

Suction duct 28 of suction case 1 and main case 7
Communication with the dust collection chamber 9 is provided by a hose 51. The suction duct 28 and the hose 51 are connected to the joint 52
It is removably attached. The hose 51 and the dust collection chamber 9 of the main body case 7 are connected by a bent tubular inlet 53. Inlet 53 has
It has a hole 54 that communicates with the outside, and a suction ring 55 that opens and closes this hole 54 is rotatably provided. An airtight packing 56 is attached to the open end of the dust collection chamber 9 of the inlet 53. Airtight packing 5
6 is supported on the inner wall of the dust collecting chamber 9 by a packing presser stand 57. The packing holder 57 is fixed to the inner wall of the dust collection chamber 9 using screws. Inlet 5
3 is attached to the outer wall of the main body case 7, that is, the outer wall of the dust collection chamber 9, using screws for fixing the packing presser stand 57.

The electric blower 6 housed in the drive chamber 38 has a rotation center 44 of the rotation shaft 17 of the electric blower 6 with respect to a rotation center 43 of the rotating brush 4 when the belt 5 is not stretched around the rotation shaft 17. In addition, when the belt 5 is stretched around the rotating shaft 17, the rotating center 44 of the rotating shaft 17 of the electric blower 6 is parallel to the rotating center 43 of the rotating brush 4. It is set as.

The vibration isolating rubber 54 is supported by a receiving portion 46 provided on a side wall inside the drive chamber 38 .

A receiving part 59 for a paper bag filter holder 58 is integrally provided on the packing presser stand 57. The paper bag filter holder 58 includes a mounting piece 61 and a hook piece 62 for attaching the support 60a of the paper bag filter 60, a locking piece 63 that engages with the receiving part 59 of the packing presser stand 57, and is provided on the inner wall of the dust collection chamber 9. It also includes a locking plate 64 that engages with the hook 68 and a cylindrical body 65.

The cylindrical body 65 is provided at the center of the paper bag filter holder 58. The cylindrical body 65 has one end sealed with an airtight packing 5.
6 and insert the other end into the paper bag filter 60. A support packing 67 having a check valve 66 integrally formed thereon is attached to the outer periphery of the cylinder 65.

A dust collecting gasket 69 is provided around the entire opening end of the dust collecting chamber 9 of the main body case 7. The dust collecting lid 70 is attached to the main body case 7 with a clamp 71 with its peripheral edge in pressure contact with the dust collecting gasket 69.

The cord reel chamber 40 has a cord reel 39
and a holding device for the operating handle 8. The holding device includes a synthetic resin pipe guide 72 and two handle support fittings 73a and 73b that clamp and reinforce the pipe guide 72, and is screwed to the inner wall of the cord reel chamber 40. The pipe guide 72 and the handle support fitting 73a have a holding hole 7 for holding the operating handle 8 in the holding device.
4 will be provided. A locking pin 92 provided on an attachment/detachment button 75 supported on the main body case 7 engages with the holding hole 74 . The cord reel 39 is attached to the cord reel support plate 76. Cord reel support plate 76
are screwed to the inner wall of the cord reel chamber 40. A holding device is arranged below the cord reel support plate 76.

A cord reel stopper is attached to the cord reel support plate 76. The cord reel stopper is connected to the cord reel operation button 78. The cord reel support plate 76 is provided with a plurality of cooling ventilation holes for cooling the power cord 79 wound around the cord reel 39 by the exhaust flow. The cord reel support plate 76 is provided with a prevention wall that prevents the power cord 79 from being wound incorrectly.

A control panel 82 is provided on the upper end surface 7a of the main body case 7. control panel 82
is provided with a switch button 83 and a cord reel operation button 78.

Control panel 82 and switch button 8
3 and the cord reel operation button 78 are integrated by a linear button spring 84 and a button holder case 85, and are connected to the cord reel chamber 40 of the main body case 7.
It is clamped and fixed between the opening and a reel lid 86 that covers this opening. The switch button 83 is connected to a power switch 87. The cord reel operation button 78 is connected to a cord reel stopper.
When the switch button 83 is pressed, the power switch 87
is turned on, and the electric blower 6 rotates. When the switch button 83 is pressed again, the power switch 87 is turned off and the electric blower 6 rotates.
When the cord reel operation button 78 is pressed, the cord reel stopper is released and the power cord 79 is wound around the cord reel 39.

The drive chamber 38 and the cord reel chamber 40 communicate with each other through a main body duct 88, and a portion of the exhaust flow from the electric blower 6 passes through a main body duct inlet 89 and flows out from a main body duct outlet 90. The exhaust flow flowing into the cord reel chamber 40 passes through the cooling ventilation hole and is discharged to the outside from the cord outlet 91 while cooling the cord reel 39 and the power cord 79. The main body duct 88 is connected to the outer wall of the dust collection chamber 9,
That is, a recess is formed on the back surface of the main body case 7,
Store it in the recess. The duct cover body 94 covering the recess is held on the back surface of the main body case 7 by storage holders 97 and 98.

A switching arm 96 is provided inside the mouthpiece case 1 and is moved by sliding of the cleaning surface switching knob 11.
The switching arm 96 is used to select whether the driving pulley 15 is wound around the driving pulley 15 or around the idle pulley 16.

The operating handle 8 can be pulled out upward from the upper end surface of the main body case 7 by pressing the attachment/detachment button 75 and pulling out the locking pin 92 from inside the operating handle 8. The removed operation handle 8 is held on the back surface of the main body case 7 by storage holders 97 and 98.

In the above configuration, by pulling out the power cord 79 from the cord reel chamber 40, plugging it into an outlet (not shown), pressing the pedal 12 of the mouthpiece case 1, and removing the locking arm 35 from the locking recess 34, the main body case 7 and turn on the power switch button 83 of the control panel 82, the electric blower 6 rotates and the bottom plate 2
Suction of dust from the opening 3 and driving of the belt 5 are performed simultaneously.

A switching arm 96 that is slid by the cleaning surface switching knob 11 causes the rotary brush 4 to rotate when the belt 5 is wound around the drive pulley 15, and when the belt 5 is wound around the idle pulley 16. When the rotating brush 4 is not rotating, the rotating brush 4 does not rotate. When the rotating brush 4 rotates, it scrapes up dust adhering to the surface to be cleaned.

Dust flowing in from the opening 3 of the bottom plate 2 passes through the rotating brush storage chamber 18 - suction duct 28 - joint 52 - hose 51 - inlet 53, and flows into the paper bag filter 60 installed in the dust collection chamber 9. Stored inside. A check valve 66 located between the inlet 53 and the paper bag filter 60 is pushed open by wind pressure and closed when the wind pressure disappears.

The exhaust flow that has passed through the paper bag filter 60 passes through a suction port duct 42 provided in the drive chamber 38 and is cooled in the electric blower 6, and then passes through the outer periphery of the suction port 42 and is discharged from the exhaust port 49. A part of the exhaust flow passes through the main body duct 88, flows out of the cord reel chamber 40, passes through the cooling window provided with the cord reel support plate 76, cools the power cord 79, and then exits from the cord outlet 91. Discharge.

When the mouthpiece height adjustment knob 10 is rotated, the front wheel shaft 22 is rotated by the height adjustment cam 26, and the amount by which the front wheel 21 projects downward from the bottom plate 2 changes. Therefore, by rotating the suction height adjusting cam 26, the height between the surface to be cleaned and the bottom plate can be adjusted. When cleaning a surface to be cleaned such as a floorboard, when the cleaning surface switching knob 11 is slid and the belt 5 is wound around the idling pulley 16, the inclined protrusion 2
4 and 25, the floor brush 23 protrudes outward from the bottom plate 2.

If you want to throw away the paper bag filter 60 in the dust collection chamber 9, press the clamp 71 to remove the dust collection lid 70, and while bending the locking plate of the paper bag filter holder 58, discard the paper bag filter 60 in the dust collection chamber 9. Remove from. As a result, the paper bag filter 60 and the paper bag filter holder 58 are removed together from the packing presser holder 57, so that the paper bag filter 60 can be pulled out from the dust collection chamber 9 by holding the locking plate 64 of the paper bag filter holder 58. The pulled out paper bag filter 60 is carried to a garbage disposal site such as a trash can with a locking plate, and there, after removing the paper bag filter holder 58, it is thrown away.
The paper bag filter 60 can be removed from the paper bag filter holder 58 by bending the support 60a of the paper bag filter 60 from the hook piece 62 of the paper bag filter holder 58.

A new paper bag filter 60 is installed by inserting the support 60a of the paper bag filter 60 into the attachment piece 61 of the paper bag filter holder 58, and then inserting it into the hook piece 62 while bending it. To attach the paper bag filter holder 58 to the packing holder 57, insert the locking piece 63 of the holder 58 into the receiving part 59 of the packing holder 57, and while pushing the airtight packing 56, attach the paper bag filter holder 58. Stop plate 6
This is done by bending the locking plate 4 and engaging the locking plate 64 with a hook 68 provided in the dust collection chamber 9.

A recess 27 provided on the mouthpiece case and an intermediate stand 20
The rotation space of the rotating brush 4 can be set small by the dust guiding plate 19 formed integrally with the intermediate stand 20, so the flow velocity of the air sucked into the rotating brush 4 is increased, resulting in a strong suction force. It can be grown. In addition, the dust guide plate 19 integrally formed on the intermediate stand 20 allows a smooth flow path to the suction duct 28, so that the dust scraped up by the rotating brush 4 can smoothly flow into the suction duct. 28
Guided within.

The floor brush 23, the cleaning surface switching knob 11, the front wheel 21, the height adjustment cam 26, and the switching arm 96 are attached to the intermediate stand 20 in advance, and the intermediate stand 20 is attached to and removed from the suction case 1. Therefore, the floor brush 23, cleaning surface switching knob 11, front wheel 21, height adjustment cam 26, and switching arm 96 can be assembled and disassembled into the suction case 1 very easily.
Moreover, by incorporating the intermediate stand 20 into the mouthpiece case 1, the strength of the mouthpiece case 1 is improved, and the accuracy of the amount of protrusion of the floor brush 23 and the front wheel 21 from the bottom plate 2 can be increased.

[Effect of idea]

As described above, according to the gun design, the locking arm and the rotating shaft of the main body case are attached to the wheel frame, and the rotating shaft of the electric blower is arranged in the center of the tilting shaft of the main body case, so it is strong and Moreover, an upright vacuum cleaner with excellent operability and a locking mechanism for the main body case and the mouthpiece case can be obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view of the rear wheel portion, FIG. 2 is a perspective view showing the assembled state of the rear wheel portion, and FIG. 3 is an overall front external view.
Figure 4 is an overall rear external view, Figure 5 is a vertical sectional view of the main parts, Figure 6 is a bottom view with the bottom plate of the mouthpiece case removed, and Figure 7 is an exploded perspective view of the mouthpiece case.
FIG. 8 is a diagram of the electric blower in a stored state, FIG. 9 is a rear view of the main body case with a part cut away, and FIG. 10 is a perspective view of the main part showing a state in which a paper bag filter is attached. 1... Suction case, 1a... U-shaped notch, 4...
...Rotating brush, 6...Electric blower, 7...Main case, 9...Dust collection chamber, 12...Pedal, 17...
Rotating shaft, 20...Intermediate stand, 21...Front wheel, 29
... Rear wheel axle, 30 ... Rear wheel, 31a, 31b
... Wheel frame, 32 ... Rotating shaft, 33 ... Bearing hole, 34 ... Locking recess, 35 ... Locking arm,
37...Arm spring, 38...Drive chamber.

Claims (1)

[Scope of utility model registration request] A mouthpiece case 1 having a U-shaped notch 1a, and a main body case 7 which is tiltably fitted into the U-shaped notch 1a and whose interior is partitioned into a drive chamber 38 and a dust collection chamber 9 in that order from the bottom. , a rotating brush 4 provided in the suction case 1, a front wheel 21 attached to an intermediate stand 20 provided in the suction case 1, a rear wheel 30 provided at the rear of the suction case 1, and the drive chamber. 3
8 and the dust scraped up by the rotating brush 4 is collected in the dust collection chamber 9 in the suction case 1.
an electric blower 6 that creates an air flow guided inward, and two wheel frames 31a and 3 that are fixed to the intake case 1 and hold the rear wheel axle 29 of the rear wheel 30.
1b, a pedal 12 provided on the outer periphery of the upper surface of the mouthpiece case 1, and one engaging with a locking recess 34 provided near the rotation shaft 32 on one side of the main body case 7,
and a locking arm 35 whose other part is in contact with the pedal, and when the pedal 12 is pressed, the locking arm 35 is disengaged from the locking recess 34 and the pedal 12 is pressed. When released, arm spring 3
7, the wheel frames 31a, 31 are attached to the wheel frames 31a, 31b so that engagement with the locking recess 34 is maintained.
b is formed on both sides of the main body case 7,
and a rotation shaft 32 for tiltably attaching the main body case 7 to the U-shaped notch 1a of the suction case 1.
A bearing hole 33 for rotationally holding the is formed, and
An upright vacuum cleaner characterized in that a rotating shaft 17 of the electric blower 6 is disposed at the center of the rotating shaft 32.