JPS62233134A - Electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a vacuum cleaner, and particularly to a vacuum cleaner equipped with a control circuit that makes power consumption variable, it is suitable for easy mounting of a board, safety, and serviceability. relating to things.

[Conventional technology]

In conventional devices, as described in Japanese Utility Model Application Publication No. 59-127549, a control circuit using a thyristor that makes power consumption variable is surrounded by ribs on the main body case, so that exhaust air does not flow into the circuit. There is something.

[Problem that the invention seeks to solve]

With the above conventional structure, if the electrical components in the circuit burn out due to incorrect wiring, etc., the case may be deformed even if it does not burn out, and the circuit can be directly touched during service, making it difficult to install. There was a lack of consideration given to safety and ease of handling during service. Furthermore, if the electrical parts burn out, the inner wall and ribs of the case will also catch fire, so it is necessary to replace not only the circuit part but also the large case, resulting in very poor serviceability.

An object of the present invention is to eliminate the above-mentioned problems of the prior art, and to ensure that even if an electrical component in the circuit burns out due to incorrect wiring, it will reliably prevent the case etc. from being inflamed, and it will also facilitate the handling of the circuit. The aim is to improve service quality. In addition, if there is no risk of burnout, one circuit section may be configured to be directly attachable to the main body.

[Means for solving problems]

The above purpose is to form a box-shaped rib body on the main body, house the control circuit section that makes the power consumption variable in the box-shaped member, configure it as one subassembly, and install it inside the main body. Alternatively, this can be accomplished by directly attaching it inside the box-shaped rib body.

[Effect]

When a thyristor is electrically destroyed due to incorrect wiring, an overcurrent flows through the resistors in the circuit, causing them to burn out. In this case, if the structure is such that the exhaust air from the electric blower flows into the circuit section, there is a serious problem that the surrounding structural members will also be burnt out, eventually leading to a fire. In addition, with a conventional structure in which the circuit section is surrounded by case ribs, the case ribs will catch fire by the time the case runs out of oxygen, so even if the fire can be suppressed in this area, not only the circuit section but also the case must be replaced. It becomes necessary. On the other hand, in the present invention, one circuit part is housed in a box-shaped member, so even if the inner wall of the box-shaped member catches fire before oxygen deficiency occurs, the box-shaped member including the circuit can be replaced. It has good serviceability as it only needs to be replaced. Furthermore, if the degree of fire is expected to be severe, the box-like member may be made of a flame-retardant material, which can be done at a much lower cost than making the entire case from a flame-retardant material. Furthermore, in the first invention, the circuit section is housed in a box-like member and configured as one subassembly.

When installing it to the main body, there is no need to touch the circuit part with your hands, and assembly and disassembly can be performed safely. Furthermore, if there is no risk of burnout as described above, the circuit section can be housed directly within a box-shaped rib body provided on the main body.

[Embodiments of the invention]

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

In FIG. 1, the suction body 1 is provided so that a part of the rotating brush 23 is exposed to the opening 3 of the bottom plate 2.

The rotating brush 23 is rotated by receiving power from an electric blower 6 associated with a dust suction drive unit via the belt 5.

The main body case 7 extends an operating handle 8 upward, has a dust collection space 44 in the center, and is tiltably attached to the mouthpiece 1 as shown by solid lines and chain lines in FIG. When not in use, it is constructed so that it can be placed upright on the mouthpiece 1 (as shown by the solid line).

In Figure 3, W2 is the bottom plate 2 when leaning upright.
indicates the distance between and the floor surface, and Wl indicates the distance when in use.

The mouthpiece body 1 has a switching knob 10 on the outside. A bumper 112 that prevents scratches on furniture; a pedal 12 used when locking the body case 7 onto the mouthpiece 1; and the body case 7.
A base rail 13 that pivotally supports the is provided.

This switching knob 10 is a knob that adjusts the distance between the bottom plate 2 of the suction body 1 and the surface to be cleaned, and is integrally connected to the height setting cam 14 as shown in FIGS. 1 and 4. Pinch position spring part 1 configured to have an elastic force by providing a notch in a part of the cylindrical side surface so as to be fixed in a rotating position.
5 is provided. The height setting cam 14 is
As shown in FIG. 5, the planes x, y, and za-a are divided approximately equally in the circumferential direction and have steps in the direction of the knob axis, and each plane selectively contacts the front wheel axle 16.

The front wheel axle 16 has a crankshaft shape as shown in FIG. 5, and both ends 17 thereof are rotatably supported by the mouthpiece body 1. A front axle 18 for height adjustment is provided at both ends 17.
is installed. Furthermore, as shown in FIG.
An axle push-out lever 19 protruding from the outside so as to engage with the axle shaft is configured to abut a portion of the both end portions 17 at an intermediate portion of the lever.

The front end of the mouthpiece body 1 is equipped with a driving pulley 20, a brush brush 21 with bristles flocked in a spiral shape on the outer periphery, and three brush brushes in the longitudinal direction.
There is a rotating brush 23 on which protrusions 22 are divided and arranged in a spiral manner.

The protrusions 22 are arranged at a total of six locations on the front and back sides of the rotating brush 23, and the brush brushes 21 are arranged on the surface where the protrusions 22 are not provided so that the spiral angle between each brush is almost constant. The one-rotation brush 23 that is included in the brush needs to be relatively thick because it is used for flocking, and for this reason, it is made of plastic injection molded with a foaming agent mixed therein. Also.

The rotating brush 23 has a hollow interior and is supported by a bearing 25 through a fixed shaft 24. Bearing covers 26 are provided at both ends of the fixed shaft 24, and a vibration-proof cap 27 made of an elastic material is provided. It is removably attached to the mouthpiece body 1 via the mouthpiece. The anti-vibration cap 27 insulates vibrations from the rotating brush 23 to the suction body 1, and has a lip portion 28 on the inner periphery to prevent dust from entering the bearing 25. Further, in order to adjust the play in the axial direction of the rotating brush 23, a thrust spring 29 is provided between the bearing 25 and the bearing contact surface of the rotating brush 23.

As shown in FIG. 7, at the rear end of the mouthpiece body 1, a rotation shaft 30, which is integrally provided in the main body case 7, is rotated by a semicircular bearing rib 31 provided on the mouthpiece body 1. freely supported,
Similarly, as shown in FIG. 9, there is a base frame 13 having a semi-circular bearing portion 32. Here, the semi-circular bearing rib 31 is rib-shaped because it is provided integrally with the mouthpiece body 1, but if it is semi-circular, it can be made as a separate part from the mouthpiece body 1 and configured without being rib-shaped. It is something. The base frame 13 is approximately U-shaped when viewed from the bottom as shown in FIG. In order to lock the main body case 7 at the positions shown by solid lines and chain lines in FIG.

A lock arm 35 is provided that comes into contact with a locking portion 34 provided on the main body case 7. Further, both side portions of the U-shape, that is, the portions constituting the bearing portion 32 are box-shaped, which increases rigidity and allows ribs for reinforcement to be easily provided without affecting the appearance. Furthermore, the U-shaped central portion has a sloped portion 82 at the rear of the main body, and when the main body case 7 is tilted horizontally, it has a sloped surface of a shape corresponding to the sloped portion 82 so as not to interfere with the sloped portion 82. ing. The lock arm 35 has a cylindrical portion 36, and a helical biasing spring 37 is provided to bias the lock arm 35 toward the locking portion 34 with the cylindrical portion 36 as a rotation axis. Furthermore, the lock arm 35 is integrally provided with a flat portion 38 that comes into contact with the lower end of the pedal 12 when the pedal 12 is depressed.
The structure is such that the locking between the locking portion 34 and the locking portion 34 is released. Here, the pedal 12 is attached with a support shaft 39 provided on the mouthpiece body 1 as the center of rotation,
When there is no depression, the flat portion 38 and the lower end abut against each other due to the biasing force of the biasing spring 37, and are thereby positioned.

Further, the base frame 13 is provided with a belt cover 40 on the side on which the belt 5 is suspended for safety.

As shown in FIG. 7, the aforementioned dust flow path in the suction body 1 communicates with the main body duct 42 through the suction duct 41 and is connected to the main body case 7. As shown in FIG. 12.13, the suction duct 41 has a corrugated portion 84 in the middle to provide elasticity, and the opening 3 side of the suction body 1 is
A zero body duct having a flange portion 87 formed in a trumpet shape so that it fits into a groove portion 86 formed by a rib body 85 provided on the suction body 1 and allows dust and airflow to flow smoothly into the duct. The side that fits with 42 is.

It is formed in an elbow shape so that the flow path is bent at approximately 90 degrees, and the end face has a cylindrical fitting part 88 formed in a stepped shape with the outer side widened one step for fitting. Furthermore, when attaching the suction duct 41 to the suction body 1, first fit the flange part 87 into the groove part 86 with the body facing down as shown in FIG. The base frame 1 is positioned and installed by pushing it in so that it aligns with the fitting part (body duct side) 89, as shown in Fig. 11.
3, a guide portion 90 and a duct holding portion 91 are formed in a semicircular arc shape, and the positioning portion 92 of the suction duct 41 is positioned and held. At this time, although the positioning part 92 shown in the embodiment (drawing) bends the flow path, there is no problem in maintaining this positioning even if it is not bent, that is, in a straight shape.By the way, the main body duct 42 has a fitting part 89 (main body duct side) with the suction duct 41, and is fitted inside the rotation shaft 30 of the main body case 7. The exhaust flow of the electric blower chamber 43 is connected to this rotation axis 3.
The main body duct 42 has a stepped part 93 for fast flow so that the flow does not pass through the inside of the mouthpiece body 1 and go toward the suction body 1 side.
The fitting part (main body duct) of the main body duct 42 has a positioning part (main body duct) 94 having a diameter that fits with the inner diameter of
The main body duct side 89 is positioned.

Since the diameters of the fitting part 89 and the positioning part 94 are different as seen from the drawing, the zero main body duct 42 has a duct tapered part 95 in the middle to smooth the flow of dust and airflow. Since it is installed across the electric blower chamber 43 and the dust collection space 44, an airtight step is provided to improve airtightness with the airtight rib body 96 provided on the main body case 7 to make both chambers (rain space) airtight. 97.

The main body case 7 is roughly divided into three spaces: an electric blower room 43. It consists of a dust collection section space 44 and a cord reel chamber 45.

In the electric blower room 43, f! ! Dynamic blower6. Exhaust port 46. An intake duct 48 with a suction port 47 that communicates with the dust collection space 44 and an inlet 50 of an exhaust duct 49 that communicates with the cord reel chamber 45 are provided. A step 51 is provided for engaging the extended axle push lever 19. The intake duct 48 is fitted with an airtight rib member 96 provided on the main body case 7 via a soft duct packing 98 having a circular cross section, and is provided approximately in the center of the flow path as shown in FIG. The partition wall 99 prevents the generation of swirling flow in the duct due to fan rotation of the electric blower 6, smoothes the flow, and significantly reduces the noise level. Furthermore, the intake duct 48 is provided with a sound absorbing plate 100 (
A reflector plate 54 including a lamp 52 for lighting (urethane material) and a lamp holder 53 thereof is attached.
The light is irradiated to the outside through a lamp window 55 provided on the wall of the electric blower room 43. At this time, a part of the exhaust air from the electric blower 6 is sent to the lamp 52 portion to reduce the surface temperature of the lamp 52.

In addition, in the dust collecting space 43, a main body duct 4 is provided along the back side.
2 is arranged, and as shown in FIG. 14, the main body duct 42
The T-shaped fitting 4 is connected to the opening 56 of the opening 56 . This T-shaped fitting 4 is divided into two parts, and one opening 9a is attached to the main body case 7 via an airtight packing 57 and a box-shaped part called a filter base 58.

Further, the other opening 9b is normally closed by a flow path cover 80 having an arcuate gasket 79 that can be opened and closed. The T-shaped fitting 4 is provided with a tapered part 81 so that it can be fitted with a joint part of an attached hose (not shown), and when using the attached hose, the flow passage cover 80
is opened and the joint part is fitted into the tapered part 81, and
It is configured so that the flow path from the mouthpiece body 1 is closed at the side surface of the joint part. A filter 59 for collecting dust is made of a material such as paper or cloth, and is removably attached to the filter base 58 by engaging a 9-fold paper section 60 with a holder 61. The dust collection space 43 is airtight with the outside by a dust collection gasket 62 provided around the periphery and an airtight rib 64 provided on the front lid 63, and the electric blower 6
During operation, the dust collection section space 44 is configured to have a negative pressure. A filter 59 is installed on the front lid 63.
In order to notify when it is time to dispose of the dust inside, and to prevent the temperature from rising due to insufficient cooling of the electric blower 6 when the air volume decreases, a dust meter 65 is installed that has the function of supplying a bypass flow from the outside. Front M6B by 101
It is held in In addition, a clamp 66 is attached to the clamp spring 1 in order to removably engage the main body case 7 at the upper end.
It is provided together with 02.

Further, the cord reel chamber 45 includes a cord reel 68 for winding the power cord 67. 11 with volume! source switch 69. Cord reel button 70 and exhaust duct 49
A lower exit 1 is provided.

The cord reel button 70 is urged upward by a button spring 104, and when assembled, the spring support rib 105 provided on the main body case 7 is thinned and bent as shown in FIG. After assembly, as shown in FIG. 18, a cord opening 106 is provided directly below the spring support rib 105 to prevent the spring support rib 105 from deflecting. Further, the cord reel button 70 has a rib portion 109 that sandwiches a guide rib 108 provided on the main body case 7. A power transmission line 72 from the cord reel 68 to the electric blower 6 is connected through the exhaust duct 49. Here, the exhaust duct 49 is connected to the main body case 7 and the duct fi.
73 to form a duct.

The cord reel chamber 45 is composed of a main body case and a reel lid 74, and the reel lid 74 has a roller lever 103 and a lever spring 10 that stop the rotation of the cord reel 68.
7 and a cord reel 68 is attached.

In the unlikely event that the power cord 67 is disconnected and needs to be replaced,
The contact piece 75 has a structure that can be separated from a ring-shaped contact 77 provided on a reel support base 76 disposed on the main body case 7 side, and the power transmission line 72 connected to the contact 77 can be separated. It can be replaced without touching it.

As shown in FIG. 19, the reel support stand 76 has a contact cover 1
15 is attached, and has a control board 112 inside for controlling the power consumption of the vacuum cleaner. The locking portion 114 of the control board 112 engages with the locking protrusion 113 of the contact cover 115 and is attached and held. This is good from the standpoint of protecting the live parts. That is, if the terminals of the reel support stand 76 and the control board 112 are electrically protected separately, the number of parts and space will increase. ).

This makes it possible to reduce manufacturing costs. Further, as shown in FIG. 20, the terminal portion of the power switch 69 with a volume is covered with a switch cover 110 which is divided into left and right halves for electrical protection. In addition, these electrical parts are assembled and wired as shown in the figure, and can be formed as a single piece, making it easy to assemble and disassemble into one main body. A volume knob 111 is installed.

Here, the power consumption is controlled using a thyristor, and the thyristor is attached to the motor guard 116 provided directly above the suction port 47 below the dust collection section space 44 to achieve cooling by suction airflow.

Handle 8 attached to the upper end of the cord reel chamber 45
At the tip of the tip, in case of an unexpected fall backwards.

A handle cap 7B made of a soft material is provided to cushion the impact.

A mounting screw 117 for preventing the handle 8 from coming off, and a retainer 118 for holding the screw on the handle 8 are attached to the main body mounting portion of the handle 8.

There are grooves (handles) 119 on the sides (both sides).

Additionally, a mounting screw 117 is attached to the main body case 7.

A fixing nut 127 is embedded in the rib-shaped protrusion (main body) to fit into this groove (handle) 119.
120, and their fitting ensures the strength of attachment of the handle 8 to the main body case 7. However, in this state, if bending stress is applied to the attachment part of the handle 8, such as when lifting the vacuum cleaner body by holding the handle 8, the upper surface of the main body case 7 will be deformed and damaged. To prevent deformation, the cord reel 68
The reel M74 covering the reel M74 is provided with a protrusion 121 extending in the depth direction, and the main body case 7 is provided with a groove (main body) 122 to fit with the protrusion 121. In addition, in this embodiment, fitting ribs (reel cover) 123 and 124 are further provided on the reel lid, and fitting ribs (main body) 125 and 126 are provided on the main body case 7 to fit with these, and reinforcement is performed. There is.

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

In use, the power cord 67 is pulled out from the cord reel 68, connected to a power source, the pedal 12 at the rear of the mouthpiece 1 is stepped on, and the main body case 7 is tilted from above the mouthpiece 1.

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

At this time, if the position of the switching knob 10 is set so that the position X of the height setting cam 14 comes into contact with the front wheel axle 16, the amount of protrusion of the front height adjustment axle 18 from the bottom plate 2 will be Minimum (as shown by the solid line in Figure 3), which is ideal for cleaning carpets with short piles.

In addition, if the carpet has a long pile or a medium pile, the height adjustment front axle 1 can be adjusted by turning the switching knob 10 to the 2 or Y position of the height setting cam 14. Since the amount of protrusion from the bottom plate 2 changes, it is possible to clean according to the difference in the pile of the carpet.

Here, a case in which the switching knob 10 is turned will be explained. That is, when the main body case 7 is placed against the suction body 1, the stepped portion 51 provided in a part of the main body case 7 due to its rotation.
pushes down one end of the wheel push-out lever 19 that protrudes from the mouthpiece 1, and by using this, the front axle 1 for height adjustment is pushed down.
The positions of both ends 17 of 6 are at the maximum amount of protrusion of the height adjustment front axle 18, or slightly more than that.

Push down both ends 17 of the front wheel axle 16. Then.

The height setting cam 14 and both ends 17 are separated, and the switching knob 10
Since no external force is applied to turn the wheel, it can be easily turned to the desired position.

After that, the main body case 7 is tilted again.

The stepped portion 51 similarly rotates to free the axle pushing lever 19 and bring the height setting cam 14 into contact with both ends 17 of the front wheel axle 16.

When cleaning is performed using the method described above, the air flow containing a large amount of dust passes through the opening 3 of the bottom plate 2 of the suction body 1, passes through the suction duct 411 and the main body duct 42, flows into the filter 59, and flows into the filter 59. A filter 59 separates and filters clean air from dust.

Only clean air passes from the suction port 47 to the intake duct 48° and through the electric blower 6, and part of it is exhausted to the outside of the machine from the exhaust port 46, and another part flows into the exhaust duct 49 from the inlet 50. The cord is introduced into the cord reel chamber 45. This exhaust gas cools the power cord 67, the contact piece 75 of the cord reel 68, the contact 77 of the reel support 76, etc., and then is discharged to the outside of the machine. At this time, the exhaust duct 49 has a relatively long distance, so that a sound effect can be obtained, and the fact that the exhaust air is released from the narrow exhaust duct 49 to the cord reel chamber 45, which is a wide space, is also effective in muffling noise. be.

As described above, according to this embodiment, the control board 112 for controlling the power consumption of the vacuum cleaner is housed in the box formed by the reel support base 76 and the contact cover 115, and the volume (variable resistor) ) Phase power switch 6
Since the thyristor is housed in the switch cover 110, which is made up of two parts, in the unlikely event that the thyristor is electrically damaged due to incorrect wiring, an overcurrent will be generated in the resistance of the control board 112 and the variable resistance of the current switch 69. Even if burnout occurs due to the flow of water, the time until oxygen deficiency occurs is short and the burnout will occur between the reel support base 76, contact cover 115, and switch cover 110.
This has the effect of preventing further fire to the main body case 7, etc., by the inner wall of the main body. At this time, if it is predicted that a severe fire will occur, the reel support stand 76 and the contact cover 1
If the switch cover 15 and the switch cover 110 are made of flame-retardant material, there will be no problem, and the cost increase for this will also be avoided.
It has the effect of being able to keep the amount of damage, etc., much lower than if it were made of inflammatory materials. Furthermore, since these electrical parts can be assembled and wired as shown in FIG. 20, they can be easily and safely attached to and disassembled into one main body, resulting in good assembly and serviceability.

Furthermore, if there is no risk of burnout, a configuration is possible in which the control board 112 can be directly stored in the space formed by the box-shaped rib 127 of the main body case 7 and the reel support stand 76, so the contact cover 115 can be made unnecessary. There is an effect.

〔Effect of the invention〕

According to the present invention, the control circuit section that makes the power consumption variable is housed in a box-shaped member, constructed as a single component, and installed inside the main body, so that there is no possibility of miswiring or the like. Even if the circuit section burns out, it has the effect of preventing the case from being inflamed, and the control circuit section can be safely installed and disassembled from the main body, improving ease of assembly and service. It has the effect of improving performance. Furthermore, since a configuration in which the control circuit section can be directly attached to the case is also possible, there is an effect that the number of parts can be reduced.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of an applied vacuum cleaner showing an embodiment of the present invention, Fig. 2 is an external perspective view of the embodiment, Fig. 3 is an explanatory view of tilting of the main body of the embodiment, and Fig. 4 71 is a vertical sectional view illustrating the main parts of the suction port of this embodiment, FIG. 5 is a developed view of the main parts of the suction port of this embodiment, FIG.
I is the P parent view (bottom view) in Figure 1, Figure 8 is an explanatory diagram of the pace frame part taken out from Figure 7, and Figure 9 is
The figure is a sectional view taken along the line A-A in Fig. 8, Fig. 10 is a partially broken explanatory view showing the main parts of the duct fitting of this embodiment, and Fig. 11 is a cross-sectional view showing the duct installation state of this embodiment. , FIG. 12 is a sectional view taken along line B-B in FIG. 7, FIG. 13 is a sectional view taken along C-C in FIG. 12, and FIG. 14 is an external view showing the main body duct 42 and T-shaped fitting of this embodiment FIG. 15 is a perspective view showing how the main body and duct of this embodiment are attached to the main body case, FIG. 16 is a front view showing the cord reel chamber of the main body case of this embodiment, and FIG. 17 is the same as that shown in FIG. 16. 18 is a sectional view taken along the line D-D and explains how to install the cord reel button 70; FIG. 18 is a sectional view taken along the line E-E in FIG. 1 with the handle removed; and FIG. FIG. 20 is an exploded perspective view of the reel support stand, control board, and board box of the example; FIG.
The figure is an exploded perspective view of the handle attachment part of this embodiment, No. 22
The figure is also a developed cross-sectional view of the handle attachment part of this example.
Fig. 23 is a Q view when the bundle is removed in Fig. 1, Fig. 24 is an R view when the handle is removed in Fig. 1, and Fig. 25 is a view showing the exhaust duct of this embodiment. A partially broken longitudinal sectional view and FIG. 26 are external perspective views of the intake duct of this embodiment. 112... Control board, 44... Dust collection section, 6
9... Power switch with volume, 6... Electric blower, 76... Reel support stand, 115... Contact cover, 110... Switch cover, 127... Box-shaped rib portion, 68...・Early 2 mouths // 0. 33 Hō 74 Kunihaya /6 '2E= 78th Kokuhō 19 Memu 20 Kuchi 21st 7,7-4 乎 22nd 23rd 1! ] Funeral 26 words

Claims (1)

[Claims] 1. In a vacuum cleaner body having a built-in electric blower, a dust collector, and a cord reel for winding up a power cord, the electric contact support of the cord reel is attached to a box-shaped rib part provided on the vacuum cleaner body, and A vacuum cleaner characterized in that a power control circuit board that makes power consumption variable can be placed in a space formed by the electrical contact support and the box-shaped rib part.