JPH0798034B2 - Vacuum cleaner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electric vacuum cleaner, and more particularly to a vacuum cleaner having a structure in which a cleaner main body can be rotated on a movable mounting table, and a power cord is wound around the main body. In this case, it relates to a vacuum cleaner suitable for its protection.

[Conventional technology]

Conventional vacuum cleaners are available in Japanese Utility Model Publication No. 39-36303 and Japanese Utility Model Publication No.
As described in JP-A-0-22668, an electric vacuum cleaner in which a cleaner main body and a carriage having moving wheels are separately configured, and the cleaner main body can be horizontally rotated by an axis on the carriage. Is proposed.

In the vacuum cleaner, there is no corresponding structure for the protection device when the power cord that supplies power to the electric blower inside the vacuum cleaner body is caught in the main body, and it is not possible to rotate it while it is entangled in the main body. Continuing to add the power cord causes an unreasonable force, causing a safety problem.

[Problems to be Solved by the Invention]

However, Japanese Utility Model Publication No. 39-36303 and Japanese Utility Model Publication No.
In the technique described in Japanese Patent Publication No. 0-22668, when the cleaner body is rotated with respect to the carriage, the power cord is wrapped around the cleaner body, which is troublesome in cleaning and the power cord. When the vacuum cleaner is wrapped around the main body, if you continue to apply motive power, unreasonable force will be applied to the power cord, causing problems such as damage to the power cord, disconnection, shorts, and electric shock.

Therefore, an object of the present invention is to solve the above problems and provide an electric vacuum cleaner that protects a power cord even when the power cord is wrapped around the cleaner body.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, a feature of the present invention is that a dust collector for accommodating a filter and a cleaner main body having an electric blower built therein are disposed so as to be rotatable relative to the cleaner main body. A mounting table and a moving means for moving the mounting table on the surface to be cleaned, and each of the cleaner main body and the mounting table is provided with a rotation angle restricting member that restricts a rotation angle of both. It is in.

[Action]

According to the present invention, a rotation angle that regulates both rotation angles of a mounting table provided with a moving unit such as a wheel or a caster that moves on a surface to be cleaned and a cleaner body that rotates on the mounting table. Since the regulating member is provided, even when the cleaner body is rotated on the mounting table and the power cord is wrapped around, the power cord can be protected without being applied with a tension above a certain level.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the drawings, an electric blower 2 and a cord reel 4 around which a power cord 3 is wound are provided in a cleaner body 1 of an electric vacuum cleaner, and a disposable paper bag is disposed upstream of the electric blower 2. A dust collecting part 6 that is housed in the filter 5 (hereinafter referred to as the paper bag filter 5) is formed. A lid 7 made of synthetic resin is provided at the extraction opening 6a of the dust collecting portion 6 so as to be openable and closable.

The cleaner main body 1 is made of a synthetic resin and has an upper case 1a having a substantially hemispherical shape (a radius of curvature of about 150 mm) and a lower case 1b made of a synthetic resin and having a bottomed tubular shape. Vacuum cleaner body 1
Is mounted on a mounting table 8 made of synthetic resin and having a bottomed cylindrical shape. The cleaner body 1 and the mounting table 8 are rotatably coupled to each other. The mounting table 8 projects outward from its side wall 4
It has individual legs 9. The four legs 9 are arranged at intervals of approximately 90 degrees when viewed from above the mounting table 8. The lower case 1b is fitted into the tubular portion 8a of the mounting table 8. The shape of the outer wall portion of the lower case 1b and the shape of the inner wall portion of the tubular portion 8a are both substantially circular. A caster 10, which is a means for moving the mounting table 8, is attached to the leg 9. The caster 10 is a mounting frame 10a rotatably mounted on the lower surface of the leg portion 9.
And a small wheel 10b rotatably provided on this mounting frame 10a.
Consists of. The mounting frame 10a rotates around a rotation axis extending in the vertical direction. The small wheel 10b rotates about a rotation axis extending in the horizontal direction. The upper surface of the leg portion 9 has a curved surface shape (curvature radius of about 64 mm) and is continuous with the outer wall of the mounting table 8 by a smooth curved surface. The mounting frame 10a has a substantially bowl-shaped (curvature radius of about 45 mm) sled portion covering the lower surface thereof. The rotation axis of the mounting frame 10a is located outside the side wall of the mounting table 8.

A hollow central shaft 11 is integrally formed in the central portion of the mounting table 8. The lower case 1b is integrally formed at the central portion of the outer bottom thereof with a means for rotating the cleaner body 1, that is, a fitting shaft 1c that is rotatably fitted in the central shaft 11. Lower case
Between the 1b and the mounting table 8, there are three rotatable circular cross-section members 13 for assisting the rotation of the lower case 1b. The circular cross-section member 13 is made of a small wheel made of synthetic resin, and is detachably attached to the recess 1d on the outer bottom of the lower case 1b. Sectional circular member
An elastic material 13a that absorbs a rotating sound is attached to the outer periphery of 13. The lowermost portion of the circular cross-section member 13 is located outside the lower surface of the fitting shaft 1c. On the mounting table 8, a fastener 14 made of one screw and one retaining cover made of synthetic resin.
15, the lower case 1b of the cleaner body 1 is rotatably integrated. A small recess 8b into which the retaining cover 15 is fitted is formed in a portion of the outer bottom of the mounting table 8 facing the central shaft 11. The retaining shaft 15 is attached to the fitting shaft 1c exposed in the small recess 8b.
When the lower case 1b is rotated by fixing it with a fastener 14 composed of a single screw, the retaining cover 15 rotates in the small recess 8b. The retaining cover 15 has an outer surface that does not project outward from the outer bottom surface of the mounting table 8.

The upper case 1a and the lower case 1b are fixed by a plurality of screws 16. At least the lower end outer wall portion of the upper case 1a is set to a size located outside the inner wall portion of the lower case 1b. The outer wall of the lower case 1b is covered with a rubber bumper 17. The bumper 17 is attached by inserting both ends 17b thereof between the rib 18 having a T-shaped cross section provided on the lower case 1b and the lower case 1b. An air layer having a maximum width of 2 mm is formed between the bumper 17 and the lower case 1b side. Bumper 17
Is made of a rubber material having a thickness of 3 mm, and has a vertical width of about 56 mm when attached to the lower case 1b. On the bumper 17, four bowl-shaped elastic covers 17a are integrally formed to cover the entire upper surface of the leg portion 9. The outer periphery of the bumper attached to the side wall of the lower case 1b is located outside the outer peripheral wall of the upper case 1a.

The electric blower 2 uses vibration-proof rubbers 19 and 20 to support the inner bottom of the cleaner body 1 in a vibration-proof manner. A cylindrical soundproof material 21 made of urethane home or the like is provided on the outer periphery of the electric motor part of the electric blower 2. The outer periphery of the electric blower 2 and the soundproof material 21 is covered with a sound insulation case 22 made of heat-resistant synthetic resin. An exhaust port 23 through which the exhaust flow of the electric blower 2 flows toward the mounting table 8 is formed at the bottom of the lower case 1b. The sound insulating case 22 is fixed to the inner wall of the upper case 1a with a plurality of screws 22a, and when the upper case 1a and the lower case 1b are integrated, the lower surface of the sound insulating case 22 contacts the lower case 1b, It functions as an exhaust duct between the electric blower 2 and the exhaust port 23. On the upper surface of the sound insulation case 22, a cleaner small parts storage chamber side wall 22b is integrally formed. An accommodating chamber 25 for accommodating the small cleaner component 24 is formed between the side wall 22b and the upper case 1a. On the rear surface of the upper case 1, an opening 25a communicating with the storage chamber 25 is provided. A synthetic resin storage chamber lid 26 is openably and closably provided in the opening 25a.

A synthetic resin handle 27 and an indicator 28 are provided on the upper case 1a. The indicator 28 is attached to the recess of the upper part of the upper case 1a by means of the synthetic resin presser case retainer 29. The indicator retainer 29 has a bearing portion of the handle 27 and a bearing portion of the lid body 7 that covers the pull-out opening 6a.
The upper case 1a has a recess 1d for accommodating the handle 27.
The handle 27 is rotatably supported between the indicator retainer 29 and the upper case, and is housed in the recess 1d when it is not necessary to lift the cleaner body 1 and when the cleaner body 1 is lifted. Take out from the recess 1d. The storage chamber lid 26 is formed with a knob recess 26b continuous with the recess 1d. The knob recess 26b also serves as the knob recess of the handle 27. A bulged portion 27a is formed on the upper surface of the handle 27 to facilitate gripping. The top surfaces of the indicator 28, the handle 27, the storage chamber cover 26, and the cover 7 are curved so as not to damage the hemispherical shape of the upper case 1a.

The lid 7 that covers the pull-out opening 6a is opened upward by being pivotally supported between the bearing portion of the ink case holder 29 and the upper case 1a. The lid 7 is formed with a suction port 31 to which a flexible suction hose 30 is connected. A suction hose 30 is detachably attached to the suction port 31 by using a bent tubular connection body 32. The inlet side of the connection body 32 is opened downward, and the downward angle θ is about 9 degrees. A bent tube 33, an extension tube 34, and a suction port 35 are connected to the suction hose 30.

The lid 7 has, on the back surface thereof, a suction port shutter 36, a hose mounting port 37, an electrical connector 38, a check valve 39, and a paper bag filter 5.
The packing 40 for the mouth plate 5a is attached using the back plate 41. The clamp 42 for the lid 7 is provided at the lower end of the extraction opening 6a. An engaging claw on which the clamp 42 is engaged at the lower end of the lid body 7.
Form 7a. At the upper end of the lid body 7, a rotary shaft 43 and a lid spring 44
To provide. The lid 7 is attached to the upper case 1a in a freely openable and closable manner by pivotally supporting the rotary shaft 43 between the indicator retainer 29 and the upper case 1a.

The lid 7 can be opened until the back plate 41 is in a substantially vertical state, and this state can be maintained by the lid spring 44. An inner case 45 made of synthetic resin is provided inside the dust collecting portion 6. The inner case 45 serves as a suction airflow duct from the extraction opening 6a to the electric blower 2. In the inner case 45, there is provided an afterfilter 46 made of a non-woven fabric and having a size that allows it to be taken in and out through the drawer opening 6a. At the entrance of the after filter 46, a rotatable holder 47 for holding the mouth plate 5a of the paper bag filter 5 is provided.
The after filter 46 has a structure capable of capturing fine dust and coarse dust by itself when the paper bag filter 5 is not used and having shape retention. An airtight packing 48 is attached to the inlet opening edge of the after filter 46. The airtight packing 48 presses the lid 7 and the inlet opening edge 45a of the inner case 45 when the lid 7 is closed, and prevents the suction airflow from leaking to the outside of the inner case 45. Inner case
The outlet side of 45 is pressed against the anti-vibration rubber 19 to prevent the suction airflow from leaking out of the inner case 45 from the outlet side.

The space between the outer wall of the inner case 45 and the inner bottom of the lower case 1b is used to provide an electric control board 49 on which electric parts and the like for controlling the electric blower 2 are mounted. Electrical control board
49 is fixed to the outer wall of the inner case 45. An AC phase control FLS element 50 and a metal cooling fin 51 for this element 50 are attached to the electric control board 49. Heat is dissipated from the tip of the metal cooling fan 51 by the suction airflow flowing in the inner case 45. A plurality of small holes 45b are provided in the upper portion of the inner case 45 so as to face the tip of the metal cooling fin 51. An airtight packing 52 that prevents the suction airflow from leaking from the inner case 45 is provided on the outer periphery of the metal cooling fin 51. (Refer to FIG. 8) The cord reel 4 is located close to the inner bottom of the lower case 1b and laterally of the electric blower 2. Upper case 1a
A power cord inlet / outlet body 53 for allowing the power cord 3 to come in and out is provided at the lower end portion of the. In the vicinity of the cord reel 4,
A pull-out stopper lever 54 for restricting the pull-out of the power cord 3 and a cord reel button 55 for operating the pull-out stopper lever 54 are provided. The cord reel button 55 is
It is exposed in a recess 56 provided on the outer wall of the upper case 1a. The cord reel 4 is provided with a connector 57 for electrically connecting the power cord 3 and the electric control board 49.

The indicator 28 has a structure in which one end communicates with the outside air and the other end communicates with the inside of the inner case 45 to move a pointer (not shown) by negative pressure inside the inner case 45. . A plurality of ribs 58 are provided on the edge of the exhaust port 23.
To form. The exhaust port 23 is a metal net of about 50 mesh.
Covered with 59. On the net 59, a fine dust capturing filter 60 made of non-woven fabric or the like is provided.

An exhaust passage 61 is formed between the mounting table 8 and the lower case 1b so that the exhaust flow flowing from the exhaust port 23 toward the mounting table 8 is discharged to the outside from substantially the entire circumference of the side wall of the cleaner body 1. To do. An exhaust passage 61 is maintained between the outer bottom surface of the lower case 1b and the mounting table 8 by the circular cross-section member 13. An exhaust passage 61 is formed between the outer surface of the lower case 1b and the mounting table 8 by making the outer diameter of the lower case 1b smaller than the inner diameter of the cylindrical portion of the mounting table 8. The exhaust flow that has reached the upper opening edge of the mounting table 8 through the exhaust passage 61 is discharged to the outside through the gap G formed between the lower end of the upper case 1a and the upper end of the mounting table 8. At this time, a flange portion 62 that wraps with the upper end of the lower case 1b is formed at the lower end of the upper case 1a so that the exhaust flow flows toward the surface to be cleaned such as the floor. Flange part 62
Is located outside the upper opening edge of the mounting table 8,
It is located inside the outer circumference of the bumper 17.

In order to prevent the caster 10 from colliding with the mounting table 8 when the caster 10 rotates on the lower surface of the leg portion 9, the mounting table 8 is dented on the outer wall of the mounting table 8 and has four bulging portions 8c on the inner wall. Form. A recess 63 is formed around the entire lower end of the lower case 1b so that the bulging portion 8c does not prevent the lower case 1b from rotating. Two or more protrusions 64, 64a are provided on the outer bottom surface of the lower case 1b.
Are integrally formed. On the upper surface of the mounting table 8, two or more stopper pieces serving as a member for controlling the rotation angle of the lower case 1b.
65 and 65a are integrally formed.

Protrusions 64, 64a and stopper pieces 6 serving as rotation angle regulation means
Even if the lower case 1b rotates about 350 degrees in either the left or right direction, the projections 64 and 65a simultaneously collide with the stopper piece 65 and the stopper piece 65a, respectively. It is in a positional relationship. Between the cleaner main body 1 and the upper end of the mounting table 8 and on the cleaner main body 1 side, a swing restriction rib 6
A plurality of 6,66a and 66b are provided.

Even if the suction hose 30 is attached to the cleaner body 1 and the suction hose 30 is pulled along the left or right circumferential direction of the cleaner body 1, the suction hose 30 is pulled on the mounting table 8. The circular cross-section member 13, the mounting table 8, the fitting shaft 1c, and the central shaft 11 are in contact with each other so that the cleaner body 1 smoothly rotates in the given direction.

In the above configuration, when starting the cleaning work, the suction hose 30, the extension pipe 34, and the suction port 35 are connected to the suction port 31 of the cleaner body 1, the power cord 3 is pulled out from the power cord inlet / outlet body 53, and the room wall The power cord 3 is connected to an outlet (not shown) provided in the.

Next, when the operation switch 33a provided in the bent pipe 33 connected to the suction hose 30 is turned on, the air containing a large amount of dust from the suction port 31 passes through the extension pipe 34 and the suction hose 30, The dust is filtered by the paper bag filter 5 installed in the dust collector 6 of the cleaner body 1, and only the clean air passes through the electric blower 2 and the exhaust port 2
3. Through the exhaust passage 61, through the gap G between the mounting table 8 and the upper case 1, it is dispersed and discharged to the outside of the cleaner body 1.

When the vacuum cleaner body 1 is run by pulling the suction hose 30 and there is an obstacle such as furniture on the surface to be cleaned, the bumper 17 and the elastic cover 17a hit the obstacle to scratch the obstacle. To prevent. In particular, in this embodiment, since an air layer is formed between the bumper 17 and the mounting table 8 and a strong impact force can be absorbed by the air layer, damage to the obstacle is surely prevented.

When the suction hose 30 is pulled while the bumper 17 and the elastic cover 17a are hooked on the obstacle as shown in FIG. 5, the mounting table 8 is moved as shown in FIGS. Since the mounting table 8 separates from the obstacle by rotating, the cleaner body 1 can freely travel even in a room with many obstacles such as furniture.

Furthermore, the rotation angle of the cleaner body 1 on the mounting table 8 is
It is regulated by the projection 64 and the stopper piece 65. Due to the regulation, the cleaner body 1 travels on the surface to be cleaned without winding the power cord 3 around the mounting table 8 in multiple layers. Therefore, no excessive force is applied to the power cord 3.

Furthermore, when cleaning the long-haired Jiutan, even if the mounting table 8 is fixed on the same, if the suction hose 30 is pulled left and right, the cleaner body 1 will be installed. By rotating on the stand 8, the direction of the cleaner body 1 can be easily changed. Moreover, the radius of gyration of the suction hose 30 and the cleaner body 1 is extremely small, so that the cleaning work can be performed efficiently.

In addition, the lower part of the cleaner body 1 in which the heavy electric blower 2 and the cord reel 4 are brought close to the inner bottom is provided with a mounting table 8
The center of gravity of the entire vacuum cleaner is brought closer to the surface to be cleaned by fitting it to the tubular portion 8a of the vacuum cleaner, and the leg portion 9 is projected outward from the side wall of the mounting table 8 and the caster 10 is attached to the leg portion 9. Since the vacuum cleaner body 1 is attached, the cleaner body 1 travels smoothly following the pulling direction of the suction hose without being rewound.

Further, if the circular cross-section member 13 such as a small wheel is damaged due to long-term use and it is desired to replace the circular cross-section member with a new cross-section circular member, the vacuum cleaner main body 1 is twisted back and the fastener 14 is removed. The mounting table 8 is separated from the cleaner body 1. When the mounting table 8 is separated, the circular cross-section member 13 provided on the outer bottom of the cleaner body 1 is exposed. Therefore, the damaged one of the exposed circular cross-section members 13 is removed to obtain a new circular cross-section member. Just replace it.

Further, in assembling the cleaner main body 1 and the mounting table 8, first, the hemispherical upper case 1a is held horizontally by using a yat. Next, the inner case 45, the cord reel 4, the sound insulation case 22, and the electric blower 2 are mounted in the upper case 1a. After that, in the upper case 1a, a member with a circular cross section is prepared in advance.
Attach the bottomed cylindrical lower case 1b that is equipped with 13 (small wheels). Finally, the lower case 1b is covered with the mounting table 8 in which a caster is mounted in advance, and the mounting table 8 is rotatably attached to the lower case 1b.

Although the respective structures are specifically described in the above-mentioned embodiments, other structures may be used as long as the same effects as those of the present invention can be obtained. For example, the circular cross-section member 13 may be rotatably attached to the mounting table 8 side, or may be disposed between the outer wall of the lower case 1 and the inner wall of the mounting table 8. Further, if noise reduction is not a problem, as shown in another embodiment of FIG. 12, the cleaner body 100 has a suction port 102 to which a suction hose 101 is attached and an exhaust flow of the electric blower. Exhaust port 1 that exhausts from 100
03 and 03 may be arranged in a positional relationship in which the exhaust flow is discharged to the rear obliquely leftward when viewed from the suction port 102. With this arrangement, the exhaust flow is less likely to be blown to the user's feet or the like. As in the other embodiment of FIG. 12, the exhaust port 103
When the above is discharged from the side surface of the cleaner body 100 directly to the outside, the mounting table 8 does not need to have a bottomed cylindrical shape, and may have a hole at the bottom. Leg 9 and caster 10
Is not limited to four, and may be three or five or more. The number of the circular cross-section members 13 is not limited to three and may be four or more.

Further, when the lowering of the center of gravity of the cleaner body 1 may be sacrificed, the leg portions 9 may be projected from the bottom surface of the mounting table 8 to the outside of the mounting table 8. Further, in the case where only the avoidability of the obstacle is important and the improvement of the anti-tightening of the cleaner body 1 may be sacrificed a little, the cylindrical mounting table 8
In the above, the legs 9 may be eliminated and the caster 9 may be attached to the lower surface of the mounting table 8. When the outer peripheral diameter of the mounting table 8 is made much larger than the outer peripheral diameter of the cleaner main body 1, the leg portions 9 are not provided on the side wall of the mounting table 8 and the mounting table 8 is provided.
Even if the caster 9 is directly attached to the lower surface of the cleaner body 1, the cleaner body 1 can be prevented from being twisted back. Furthermore, the structure in which the exhaust passage 61 is provided between the mounting table 8 and the cleaner body 1 is not limited to a hemispherical upper part of the cleaner body 1, or the leg portions 9 are provided on the side wall of the mounting table 8. Instead, the present invention can be applied to a case where a caster is directly provided on the lower surface of the mounting table 8. Further, the means for restricting the rotation angle of the cleaner body 1 may be one in which the upper portion of the cleaner body 1 is not hemispherical, or the leg 9 is not provided on the side wall of the cradle 8 so that the cradle 8
It can also be applied to those in which a caster is directly provided on the lower surface of the.

In this embodiment, the rotation angles of both the cleaner body 1 and the mounting table 8 are regulated to about 350 degrees, but the rotation angles are not limited to this angle. By making the power cord 3 a sturdy structure, it is possible to set the rotation angle to a range exceeding 360 degrees.

While the cleaner body 1 moves on the surface to be cleaned by the mounting table 8 while rotating, even if the cleaner body 1 swings up and down on the mounting table 8, the swinging is restricted. The ribs 66, 66a, 66b are used to hold the stoppers 65, 6a of the protrusions 64, 64a.
5a does not come off and collides with each other without fail, and the rotation angle of the cleaner body 1 is regulated within about 350 degrees.

〔The invention's effect〕

According to the present invention, the mounting table provided with the moving means for moving the surface to be cleaned and the cleaner body rotating on the mounting table are each provided with the rotation angle restricting member for restricting the rotation angle of both. Therefore, even when the cleaner body rotates on the mounting table and the power cord is wrapped around, the power cord can be protected without being applied with a tension above a certain level.

[Brief description of drawings]

1 to 13 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of an essential part, FIG. 2 is an exploded perspective view of the whole, and FIG. 3 is a separation of a cleaner body and a mounting table. FIG. 4 is a perspective view showing a state, FIG. 4 is a perspective view of the entire appearance with a suction port attached, and FIGS.
7 is a perspective view of the dust collecting portion, FIG. 8 is an enlarged cross-sectional view of an essential portion, FIG. 9 is a side view, and FIG.
Fig. 10 is an external perspective view of the main part with the parts storage lid closed,
FIG. 12 is a perspective view of an external appearance of a main part with a component storage lid opened, FIG. 12 is a bottom view of a cleaner body, and FIG. 13 is a plan view of a mounting table. 1 ... Vacuum cleaner body, 2 ... Electric blower, 5 ... Filter, 6
... Dust collecting part, 8 ... Mounting table, 9 ... Leg part, 10 ... Caster (caster), 64, 64a ... Projection body, 65, 65a ... Stopper piece.

Claims (3)

[Claims] Claim: What is claimed is: 1. A cleaner main body having a dust collecting section for accommodating a filter and an electric blower, a mounting table rotatably arranged relative to the cleaner main body, and the mounting table to be cleaned. An electric vacuum cleaner, comprising: a moving unit that moves on a surface; and a rotation angle restricting member that restricts a rotation angle of each of the cleaner body and the mounting table. 2. The electric vacuum cleaner according to claim 1, wherein the rotation angle of both the cleaner body and the mounting table by the rotation angle restriction member is set in a range not exceeding 360 degrees. 3. The rotation angle restricting member according to claim 1, wherein the rotation angle restricting member is a protrusion provided on the cleaner body side, and a stopper piece provided on a mounting table side on which the protrusion collides. An electric vacuum cleaner having: