JPH0822261B2 - Electric vacuum cleaner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vacuum cleaner, and more particularly to a suction port provided with a rotating brush.

[Conventional technology]

In the conventional vacuum cleaner, as described in JP-A-55-130635, a protective plate is attached to the lower surface of the suction port main body so as to cover the rear portion of the suction port. This protective plate is a flexible elastic body so that if a person accidentally puts a finger into the rotary brush chamber from the suction port, it will be pinched by the protrusion of the rotating brush and the rear edge of the suction port to prevent injury. In addition, the lower case of the mouthpiece main body is integrally formed with the lower case that constitutes part of the side surface and front and rear surfaces. The protective plate is fixed to the upper case of the mouthpiece together with the lower case by screwing.

[Problems to be Solved by the Invention]

However, in the technique described in JP-A-55-130635 described above, the protective plate is fixed to the upper case of the mouthpiece together with the lower case by screwing, which complicates the assembly process, and When performing maintenance such as removing thread waste entangled in the rotating brush, the screw had to be removed each time, and workability was poor.

Further, when the lower case is attached, the partition wall of the upper case is fitted into a part of the protective plate formed of a flexible elastic body integrally formed with the lower case, so that the protective plate is protected by an external force. However, there is a drawback in that the rigidity cannot be sufficiently secured at the portion where the bending and the protective plate come into contact with the partition wall.

An object of the present invention is to solve the above problems and to provide an electric vacuum cleaner in which a bottom plate can be easily attached to and detached from the lower surface of the suction body while ensuring the rigidity of the suction opening.

[Means for solving problems]

In order to achieve the above-mentioned object, a feature of the present invention is that a mouthpiece having an upper surface wall portion and an outer peripheral side surface wall portion, the lower surface being open, and rotatably disposed inside the front side of the mouthpiece body. A rotary brush for picking up dust, and a rib for partitioning formed so as to extend downward from the upper wall of the suction body to define a storage chamber for the brush in which the rotary brush is placed. An electric vacuum cleaner having an opening facing the outer periphery of the rotating brush downward and a bottom plate covering the lower surface of the suction body, wherein the vacuum cleaner is locked to the front portion of the outer peripheral side wall portion of the suction body. A notched slot for use is provided, an upward flange is provided on the outer periphery of the bottom plate, a support piece that rises from the position retracted inward from the flange is provided on the front side of the bottom plate, and the top end of this support piece is folded forward. A bending engagement claw is installed. The bottom plate is provided with a pair of receiving wall portions extending in a lateral direction with respect to a portion facing the lower end of the partition rib, and the pair of receiving wall portions form a receiving groove portion, and the outer peripheral side wall of the suction body is formed. The front side of the portion is sandwiched between the flange and the support piece, and the engaging claw portion is inserted and locked in the notch groove hole, and the lower end of the partition rib is fitted in the receiving groove portion, and is provided in the suction body. This is to rotate the rotatable bottom plate stopper to stop the rear end side of the bottom plate.

[Action]

The front side of the outer peripheral side wall of the mouthpiece is sandwiched between the flange of the bottom plate and the supporting piece, and the notch groove hole provided on the front side of the outer peripheral side wall of the mouthpiece is located at the upper end of the supporting piece and moves forward. The bent engaging claw portion is inserted and engaged. Further, the lower ends of the partition ribs are fitted into the receiving groove portions of the bottom plate. As a result, the bottom plate is firmly fixed to the outer peripheral side wall of the mouthpiece and the partition rib.

To attach the bottom plate, insert the engaging claw into the notch groove for locking on the front side of the outer peripheral side wall of the mouthpiece, and rotate the bottom plate stopper on the partition rib side to rotate the bottom plate back. Since only the end is stopped, the bottom plate can be easily attached and detached.

Example of Invention

Hereinafter, an embodiment of the present invention will be achieved by using the drawings.

In FIG. 1, the suction body 1 includes a suction port opening 3 of a bottom plate 2.
A part of the rotary brush 23 is provided so as to face the rotary brush 23, and the rotary brush 23 is rotated by receiving power from the electric blower 6 related to the dust suction operation drive unit via the belt 5. The bottom plate 2 includes ribs on the outer peripheral side surface 82 of the mouthpiece and the mouthpiece.
In the suction body 1 having the suction port opening 3 formed with 83, a flange portion 84 fitted along the outer periphery of the suction body 1 is provided,
A cutout groove 85 is provided in the longitudinal direction of the outer periphery of the mouthpiece 1, and a recess 87 having a support piece 86 that fits with the mouthpiece 1 is provided through the notch groove 85 and in contact with the inner periphery of the mouthpiece 1.

Further, the receiving wall portion that abuts against the end portion of the rib 83 inside the suction body
88 was set up.

A bottom plate stopper 89 is rotatably attached to the rear side of the bottom plate 2.

Here, FIGS. 11 to 13 are unit diagrams of the bottom plate 2, and FIG. 20 is a sectional view of the essential portions of the present invention.

The main body case 7 extends the operation handle 8 upward, has a dust collecting space 44 in the center, and is attached to the suction body 1 so as to be tiltable as shown by the solid line and the chain line in FIG. When not in use, it is constructed so that it can be leaned upright (shown by the solid line) on the mouthpiece 1 so as to stand upright.

In FIG. 2, W ₂ is the bottom plate 2 when it is leaned upright.
Indicates the distance between the floor and the floor, and W ₁ indicates the distance when in use.

The mouthpiece 1 is externally provided with a switch knob 10, a bumper 11 for preventing damage to furniture, a pedal 12 used when the body case 7 is locked on the body 1, and a base for pivotally supporting the body case 7. A frame 13 is arranged.

This switching knob 10 is a knob for adjusting the distance between the bottom plate 2 of the mouthpiece 1 and the surface to be cleaned, and the height setting cam 14 is the first.
As shown in FIG. 3 and FIG. 3, the knob position spring portion is configured to have elastic force by forming a notch in a part of a cylindrical side surface so that the knob position spring portion is integrally connected and fixed at an arbitrary rotating position.
15 are provided. As shown in FIG. 4, the height setting cam 14 is provided with planes X, Y, and Z which are divided into substantially equal parts in the circumferential direction and which have steps in the direction of the knob axis. Abut.

The front wheel axle 16 has a crankshaft shape as shown in FIG. 4, and both ends 17 thereof are rotatably supported by the suction body 1. Front end wheels 18 for height adjustment are attached to the both ends 17. Further, as shown in FIG. 3, one end of the axle pushing lever 19 is pivotally attached to the mouthpiece 1 and the other end is engaged with the main body case 7 so as to project to the outside.
Is configured so as to contact a part of the both end portions 17 at the intermediate portion of the lever.

A drive pulley 20 is provided at the front end portion of the mouthpiece 1, and a brush brush 21 having spirally planted bristles 21 on the outer periphery and a projection 22 which is also divided into three in the longitudinal direction and is also arranged in a spiral shape are provided. There is a rotating brush 23. The protrusions 22 are arranged on the front and back of the rotary brush 23 in a total of 6 places, and the brush brush 21 has a surface on which the protrusions 22 are not arranged, and the spiral angle θ between the brushes is almost as shown in FIG. It is configured to be constant. The rotary brush 23 needs to have a relatively large wall thickness for the purpose of implanting bristles. For this reason, the rotary brush 23 is formed by plastic injection molding containing a foaming agent. Also, the rotating brush 23
Is hollowed through the fixed shaft 24 and is rotatably supported by bearings 25. Bearing covers 26 are arranged at both ends of the fixed shaft 24, and a vibration-proof cap 27 made of an elastic material is used. It is detachably attached to the mouthpiece 1. Anti-vibration cap 27
Is configured to perform vibration isolation of the rotating brush 23 to the suction body 1 and to have a lip portion 28 on the inner circumference to prevent dust from entering the bearing 25. Further, a thrust spring 29 is provided between the bearing 25 and the bearing contact surface of the rotating brush 23 in order to adjust the play of the rotating brush 23 in the axial direction.

As shown in FIG. 7, at the rear end portion of the suction body 1, a rotary shaft 30 integrally provided on the main body case 7 is rotated together with a semicircular arc bearing rib 31 provided on the suction body 1. Freely pivot,
Similarly, as shown in FIG. 8, there is a base frame 13 having a semicircular bearing portion 32. Here, the semicircular bearing rib
The reference numeral 31 has a rib shape because it is provided integrally with the suction body 1, but if the shape is a semi-circular arc, it can be configured as a separate part from the suction body 1 without forming the rib shape. Base frame 13
Has a substantially U shape when viewed from the bottom as shown in FIG. 9, a rear wheel 33 is provided in the vicinity of the bearing portion 32, and a solid line in FIG. In order to lock the main body case 7 at the position indicated by the chain line, a lock arm 35 that comes into contact with the locking portion 34 provided on the main body case 7 is provided. The lock arm 35 has a cylindrical portion 36, and a spiral urging spring 37 for urging the cylindrical portion 36 as a rotation axis toward the locking portion 34 is provided. Further, the lock arm 35 is designed so that when the pedal 12 is depressed, the pedal 12
The flat portion 38 that is brought into contact with the lower end of the is integrally provided,
By depressing the pedal 12, the lock arm 35 and the locking portion 34
Is configured to be unlocked. Here, the pedal 12 is a support shaft 39 provided on the suction body 1.
Is mounted with the center of rotation as the center of rotation, and when there is no depression, positioning is performed by the flat portion 38 and the lower end contacting with each other by the biasing force of the biasing spring 37. In addition, the base frame
A belt cover 40 is provided on the side of the belt 13 on which the belt 5 is suspended for safety.

The dust passage in the suction body 1 described above is connected to the main body case 7, which communicates with the main body duct 42 by the suction duct 41, as shown in FIG.

This body case 7 is roughly divided into three spaces,
Electric blower room 43, dust collection space 44 and cord reel room 45
It consists of

In the electric blower chamber 43, an intake duct 48 having an electric blower 6, an exhaust port 46, a suction port 47 connected to the dust collection space 44, and an inlet of an exhaust duct 49 communicating with the cord reel chamber 45.
50 is provided, and the mouthpiece 1 described above is further provided outside.
A step portion 51 that engages with the axle pushing lever 19 extending from the side is provided. Further, the air intake duct 48 has a reflector 54 provided with a lamp 52 for illumination and its lamp holder 53.
Is attached, and the light is emitted to the outside from a lamp window 55 provided on the wall surface of the electric blower chamber 43.

In addition, in the dust collection space 43, the main body duct 42
, The opening 56 of the main body duct 42 is bifurcated, and the opening 56a on one side is formed by a box-shaped part, which is a filter base 58 via an airtight packing 57, to form the main body case 7.
Mounted on The other opening 56b is normally closed by an openable / closable flow path cover 80 having an arc-shaped packing 79. The opening 56 is tapered 81 so that it can be fitted with the fitting of the attached hose (not shown).
When the attached hose is used, the flow passage cover 80 is opened to fit the joint portion to the taper portion 81, and the flow passage from the mouthpiece 1 is closed on the side surface of the joint portion. Is configured. The filter 59 that collects dust is
It is made of a material such as paper or cloth, and the mouthpiece portion 60 is engaged with the holder 61 and is detachably attached to the filter base 58. The airtightness of the dust collecting portion space 43 to the outside is taken between the dust collecting portion packing 62 provided around the dust collecting portion space 43 and the airtight rib 64 provided on the front lid 63, and when the electric blower 6 is in operation, The dust space 9 is configured to have a negative pressure. The front lid 63 is provided with a dust meter 65 that has a function of flowing a bypass flow from the outside in order to notify when the dust in the filter 59 is discarded and to prevent the temperature rise due to insufficient cooling of the electric blower 6 when the air volume decreases. Has been set up,
A clamp 66 is provided at the upper end to detachably engage with the main body case 7.

Further, a cord reel 68 for winding the power cord 67, a power switch 69, a cord reel button 70, and an outlet 71 of the exhaust duct 49 are arranged in the cord reel chamber 45, and a power transmission line from the cord reel 68 to the electric blower 6 is provided. 72 is an exhaust duct
It is connected through 49. Here, the exhaust duct 49 is
The main body case 7 and the duct lid 73 are closed to form a duct. The cord reel chamber 45 is composed of a main body case 7 and a reel lid 74, and a cord reel 68 is attached to the reel lid 74. If the power cord 67 is broken and needs to be replaced, the cord reel chamber 45 comes into contact. Piece 75 and body case 7
It is structured such that it can be separated from the ring-shaped contact 77 provided on the reel supporting base 76 disposed on the side.
It can be replaced without touching the power transmission line 72 connected to. A handle cap 78 made of a soft material is provided at the tip of the handle 8 attached to the upper end of the cord reel chamber 45 in order to absorb an impact when the vehicle is unexpectedly fallen backward.

Next, the use of the huplite type vacuum cleaner according to this embodiment configured as described above will be described.

At the time of use, the power cord 67 is pulled out from the cord reel 68, connected to the power source, and the pedal 12 at the rear of the suction body 1 is stepped on to tilt the body case 7 from above the suction body 1.

Next, when the power switch 69 is turned on, the electric blower 6 is operated, and the rotary brush 4 is rotated via the belt 5 along with suction by the blower.

At this time, the position of the switching knob 10 is X of the height setting cam 14.
When the position of is set so as to contact the front wheel axle 16, the amount of protrusion of the front wheel for height adjustment 18 from the bottom plate 2 becomes the minimum (the position of the solid line in FIG. 3), and Ideal for short cleaning.

If the carpet has long hair or medium hair, use the switching knob 10 to move the height setting cam 14 to Z or Y.
By rotating the height adjusting front wheel 18 from the bottom plate 2 by rotating it to the position, it is possible to perform cleaning according to the difference in the length of the carpet.

Here, a case where the switching knob 10 is turned will be described. That is, when the main body case 7 is leaned against the suction body 1, the stepped portion 51 provided in a part of the main body case 7 pushes down one end of the axle pushing lever 91 protruding from the suction body 1 by the rotation thereof. Due to this use, the positions of both ends 17 of the front wheel axle 16 for height adjustment reach the maximum value of the protrusion amount of the front wheel 18 for height adjustment, or a position slightly more than that, until the end portions 17 of the front wheel axle 16 are reached. Push down. Then, the height setting cam 14 and the both end portions 17 are separated from each other, and no force is applied to rotate the switching knob 10, so that it can be easily rotated to a desired position.

After that, when the body case 7 is tilted again, the step portion 51
Also rotates in the same manner to free the axle pushing lever 19 so that the height setting cam 14 and both ends 17 of the front wheel axle 16 come into contact with each other.

When the cleaning is performed by the above-described method, the air flow containing a large amount of dust passes through the suction duct 41 and the main body duct 42 from the opening 3 of the bottom plate 2 of the suction body 1 and flows into the filter 59. This filter 59 separates and filters into a clean air flow and dust, and only clean air flows from the suction port 47 to the intake duct 4
8 and then passes through the electric blower 6, part of which is the exhaust port 4
At the same time, it is discharged to the outside of the machine from 6, and a part of it also flows into the exhaust duct 49 from the inlet 50 and is introduced into the cord reel chamber 45. This exhaust is the contact piece 7 of the power cord 67 and the cord reel 68.
5 and the contact 77 of the reel support base 76 are cooled and then discharged to the outside of the machine. At this time, the exhaust duct 49 has a relatively long distance, and a muffling effect can be obtained. Further, releasing the exhaust air from the narrow exhaust duct 49 to the cord reel chamber 45 forming a large space is also effective in muffling.

To attach the bottom plate 2, first, the engaging claw portion 86 ′ at the upper end of the support piece 86 is hooked in the notch slot 85 on the front side of the suction body 1. Next, the hooked state is set so that the whole is fitted to the bottom of the mouthpiece 1, and the bottom plate stopper 89 is rotated and fixed as shown in FIG. At this time, the end portion of the rib 83 inside the mouthpiece is fitted into the receiving groove portion 88 'formed by the pair of receiving wall portions 88, 88 of the bottom plate.

According to this embodiment, the bottom plate 2 can be easily attached, and since the outer peripheral side surface 82 of the suction body around the suction opening 3 and the rib 83 inside the suction body are sandwiched, the position of the bottom plate 2 is stable,
The bottom plate 2 increases the rigidity of the suction port opening 3 and prevents the slippage.

〔The invention's effect〕

According to the present invention, the front side of the outer peripheral side wall of the mouthpiece is sandwiched between the flange of the bottom plate and the supporting piece, and the notch groove provided on the front side of the outer peripheral side wall of the mouthpiece is provided with the supporting piece. Inserting and engaging the engaging claw part that is bent at the upper end and forward,
Also, by fitting the lower end of the partition rib into the receiving groove of the bottom plate, the bottom plate is firmly fixed to the outer peripheral side wall of the suction body and the partition rib, and the bottom plate is attached to the outer circumference of the suction body. The front side of the side wall part inserts and engages the engaging claw part in the notch groove for locking, and the partition rib side only rotates the rotatable bottom plate stopper to stop the rear end side of the bottom plate. The bottom plate can be easily attached and detached.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a vertical sectional view of an upright type electric vacuum cleaner, Fig. 2 is a side view in which a main body case is inclined in three stages, and Fig. 3 is a part of Fig. 1. A cutaway view, FIG. 4 is a mechanical diagram of the front wheel axle, FIG. 5 is a partial cross-sectional view of the rotating brush,
FIG. 6 is a vertical cross-sectional view of the rotary brush, FIG. 7 is a view in which the bottom plate, the main body case, and the parts inside the suction case are partially cut off when the suction case is viewed from the bottom, and FIG. 8 is a vertical cross-section of the base frame component set. Fig. 9 is a front view of the base frame component set, Fig. 10 is a perspective view of an upright type electric vacuum cleaner, Fig. 11 is a front view of a bottom plate, and Fig. 12 is C ₁ -C _{2 of} Fig. 11. Sectional view, Figure 13 is number 11
14 is a perspective view of the upright electric vacuum cleaner, FIG. 18 is a sectional view taken along line AA of FIG. 1, and FIG. 19 is a sectional view taken along line B ₁ -B ₂ -B ₃ -B _{4 of} FIG. 18 is a sectional view taken along the line DD of FIG. 18, and FIG. 20 is a sectional view of an essential part of the present invention. DESCRIPTION OF SYMBOLS 1 ... Suction body, 2 ... Bottom plate, 3 ... Suction opening, 7 ... Main body case, 23 ... Rotating brush, 82 ... Suction body outer peripheral side surface, 83 ... Rib inside a suction body, 84 ... Flange part, 85 ... Notch slot , 86 ... Support piece, 86 '... Engaging claw portion, 87 ... Recessed portion, 88 ... Receiving wall portion, 88' ... Receiving groove portion, 89 ... Bottom plate stopper.

Claims (1)

[Claims] 1. A suction body (1) having an upper surface wall portion and an outer peripheral side surface wall portion, the lower surface of which is open, and a dust scooping member rotatably arranged inside the front side of the suction body (1). Of the rotary brush (23) and a partition formed so as to extend downward from the upper wall portion of the suction body (1) in order to define a storage chamber for the brush in which the rotary brush (23) is placed. Electric vacuum cleaner having a rib (83) for use with the rotary brush (23) and a bottom plate (2) having an opening for allowing the outer periphery of the rotary brush (23) to project downward and covering the lower surface side of the suction body (1). At the front of the outer peripheral side wall of the mouthpiece (1), a notch slot (85) for locking is provided, and an upward flange (84) is provided on the outer periphery of the bottom plate (2). ) A support piece (86) rising from a position retracted inward from the flange (84). However, an engaging claw portion (86 ') that bends forward is provided at the upper end of the support piece (86), and a portion of the bottom plate (2) facing the lower end of the partition rib (83) is provided. A pair of laterally extending receiving wall parts (88)
(88) is provided and the pair of receiving wall parts (88) and (8
8) forms a receiving groove (88 '), holds the front side of the outer peripheral side wall of the mouthpiece (1) between the flange (84) and the support piece (86), and forms a cutout groove (8).
5) The engaging claw portion (86 ') is inserted and locked, and the lower end of the partition rib (83) is fitted into the receiving groove portion (88'). An electric vacuum cleaner characterized by rotating a movable bottom plate stop (89) to stop the rear end side of the bottom plate (2).