JP4473180B2 - Vacuum cleaner - Google Patents

Description

  The present invention relates to an electric vacuum cleaner having an electric blower, a cord reel, a dust collecting unit, and a dust removing device for removing dust from the dust collecting unit.

  This type of vacuum cleaner has, for example, a configuration as shown in JP-A-2005-27862 (Patent Document 1).

  The vacuum cleaner body of the electric vacuum cleaner includes a dust collecting unit on the front side, an electric blower and a cord reel on the rear side, and a filter case and a dust removing device on the middle. The electric blower and the cord reel are arranged side by side.

JP 2005-27862 A

  The dust collection unit has a dust collection filter. The horizontal width of the dust collection filter has a width approximately equal to the diameter of the blower portion of the electric blower. Since the width of the dust collection filter is only about the diameter of the air blowing part, the dust collection filter is quickly clogged due to the dust that is collected, and the suction performance is likely to deteriorate.

  An object of the present invention is to address the above-described problems, to increase the area of a dust collection filter, and to provide a vacuum cleaner that can secure a ventilation space between the dust collection filter and a filter case.

  The present invention relates to an electric blower, a cord reel, and a vacuum cleaner main body that detachably stores a dust collection filter arranged upstream of the electric blower, and a filter that is arranged in the vacuum cleaner main body and contacts the dust collection filter And a dust removal means provided on the filter case for removing dust adhering to the filter. The cord reel is arranged so that the rotation shaft is in a horizontal direction, and the first gear is disposed on the outer periphery of the reel side wall. The filter case has a ventilation port through which air that has passed through the dust collection filter flows to the electric blower, and a non-ventilated wall portion that is provided next to the ventilation port and seals the passage of air. Has a size that extends from the vent of the filter case to the ventilating wall, and the ventilating wall is provided with a concave portion or a convex portion that extends toward the ventilating passage so as to communicate with the vent. Sure Characterized in that it was.

  ADVANTAGE OF THE INVENTION According to this invention, while achieving the area expansion of a dust collection filter, the vacuum cleaner with which the ventilation space between a dust collection filter and a filter case is ensured can be provided.

  Embodiments of the present invention will be described with reference to the drawings.

  First, an outline of a vacuum cleaner according to an embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3.

  The vacuum cleaner main body 1 includes a lower main body case 2 and an upper main body case 3. The upper body case 3 has a lid 4.

  The electric blower 5, the cord reel 6, and the filter case 7 are accommodated in the rear side of the cleaner body 1. The upper body case 3 is assembled by placing the upper body case 3 after the electric blower 5, the cord reel 6, and the filter case 7 are housed in the lower body case 2.

  The electric blower 5 includes a blower 5A and an electric motor B. The electric blower 5 is placed so that the blower 5A having a fan inside is on the front side and the electric motor B is on the rear side. That is, the electric blower 5 is disposed in the cleaner body 1 so that the direction of the rotational axis of the electric blower 5 is along the front-rear direction of the cleaner body 1.

  The cord reel 6 is placed next to the electric blower 5 and is arranged so that the direction of the rotation axis of the cord reel 6 intersects the direction of the rotation axis of the electric blower 5 and is horizontal.

  A dust collecting case 8 that is a dust collecting portion is detachably housed on the front side in the cleaner body 1. The dust collection case 8 includes a dust collection chamber 9, a dust collection filter 20, and a separation unit or dust separation chamber 21.

  The dust collection filter 20 is formed of a breathable member obtained by folding a nonwoven fabric into a corrugated shape. Fine dust sucked into the dust collecting case 8 is collected by the dust collecting filter 20.

  The dust collection filter 20 comes into contact with the filter case 7 when mounted in the cleaner body 1. The lip 22 provided on the outer periphery of the dust collection filter 20 is in contact with the filter case 7 so that airtightness is maintained.

  The filter case 7 has a ventilation hole 23 and a non-ventilated wall portion 24. The vent hole 23 and the non-ventilated wall portion 24 are provided side by side. A blower 5 </ b> A is located behind the ventilation opening 23. The cord reel 6 is located on the rear side of the air-impermeable wall portion 24.

  The dust collection filter 20 has a lateral width extending from the ventilation port 23 to the non-ventilated wall portion 24. A dust removing device 25 as dust removing means is provided on the upper side of the filter case 7. The dust removal device 25 performs dust removal over the range of the lateral width of the dust collection filter 20.

  As shown in FIGS. 6 and 7, the dust removing device 25 includes a dust removing rotating body 26 and a dust removing spring 27. The dust removal spring 27 is spirally wound around the dust removal rotary body 26. The dust removal rotating body 26 is disposed horizontally with respect to the filter case 7 and is rotatably supported by a frame 28 provided around the filter case 7.

  As shown in FIGS. 4 and 5, the dust removal spring 27 of the dust removal rotating body 26 is in contact with the back surface, which is the downstream side surface of the dust collection filter 20. By the rotation of the dust removal rotating body 26, the dust removal spring 27 repels the wave front of the corrugated dust collection filter 20, and dust adhering to the dust collection filter 20 is removed.

  As shown in FIG. 8, the dust removal rotating body 26 has a clutch 29 inside. The third gear 40 connected to the clutch 29 is placed outside the side surface of the frame 28.

  The third gear 40 is driven by the cord reel 6 and rotates. The rotation of the third gear 40 is transmitted to the dust removing rotator 26 via the clutch 29. The clutch 29 transmits the rotation in one direction to the dust removing rotator 26 but does not transmit the other rotation.

  The clutch 29 has a spring 41. The rotation of the clutch 29 that rotates when the cord 6 a of the cord reel 6 is pulled out is transmitted to the dust removal rotating body 26 via the clutch 29.

  In the rotation of the clutch 29 that rotates when winding the cord 6 a of the cord reel 6, the spring 41 is bent and the clutch 29 is disconnected, so that the rotation is not transmitted to the dust removal rotary body 26.

  The cord reel 6 has a spring for causing the cord 6a to be wound and rotated. Since the rotation of the dust removal rotary body 26 is cut by the clutch 29 so that dust removal is not performed when winding the cord 6a, the load of the spring spring is reduced. For this reason, the cord 6a is wound up without stopping the cord reel 6 in the middle.

  Next, an explanation will be given regarding the area expansion of the dust collection filter, the improvement of the ventilation space, the dust removal means and the dust drive.

  In the vacuum cleaner before the improvement, as shown in Comparative FIG. 15, the width of the filter case 700 is slightly narrower than the width (diameter) of the blower 5 </ b> A of the electric blower 5. The horizontal width of the dust collection filter attached so as to fit in the filter case 700 is about the horizontal width of the filter case 700 or less.

  On the other hand, in the filter case 7 of the embodiment of the present invention, as shown in FIGS. 11, 2, and 6, the width corresponding to the width of the cord reel 6 is an expanded width than before the improvement. . As the width of the filter case 7 is expanded, the dust collection filter 20 is also expanded. The vertical display line 1001 is a line indicating the center position of the suction port 5C of the blower 5A as shown in FIG. The vertical display line 1002 is a line indicating the left end side position of the dust collection filter 20 as shown in FIG.

  As shown in FIG. 10, the vertical display line 1003 is a line indicating the left side wall position (side wall position close to the blower 5 </ b> A) of the cord reel 6. The vertical display line 1004 is a line indicating the right end side position of the dust collection filter 20.

  In the vacuum cleaner before improvement, the horizontal width of the dust collection filter is from the vertical display line 1002 to the vertical display line 1003. On the other hand, the filter case 7 of the embodiment of the present invention has a width from the vertical display line 1002 to the vertical display line 1004 shown in FIG. The filter case 7 of the embodiment of the present invention has an increased width by the L1 dimension. The expansion for the L1 dimension was realized by providing a non-venting wall portion 24 to widen the lateral width of the filter case 7.

  The extended length of the L1 dimension of the dust collection filter is about 32% longer than before the improvement.

  Due to the expansion of the area of the dust collection filter, the amount of dust attached per unit area of the dust collection filter is significantly lower than before improvement when compared with the same dust collection capacity. An electric vacuum cleaner that can maintain a strong suction force for a long time can be provided. Furthermore, since the filter area can be improved, the flow velocity of the air passing through the dust collection filter 20 can be reduced, the ventilation loss can be reduced, and the suction work rate can be improved.

  The ventilation on the downstream side of the dust collection filter will be described.

  The air passing through the dust collection filter 20 passes through the ventilation port 23 where the ventilation port 23 is on the back side of the dust collection filter 20 and is sucked into the blower. Where there is a non-ventilated wall portion 24 on the back side of the dust collection filter 20, it flows through the ventilation space between the downstream side surface of the dust collection filter 20 and the non-ventilated wall portion 24, and is sucked into the blower 5 </ b> A through the vent hole 23. It becomes like this.

  Since this ventilation space is formed between the downstream side surface of the dust collection filter 20 and the non-venting wall portion 24, the downstream side surface of the dust collection filter 20 faces the non-venting wall portion 24 as shown in FIG. ing. When the air circulation in the ventilation space is deteriorated, the enlarged portion of the dust collection filter area (the portion corresponding to the non-venting wall portion 24) loses its function as a dust collection filter. Moreover, since the downstream side surface of the dust collection filter 20 tends to bend toward the non-ventilated wall portion 24 due to the suction force of the blower 5A, the air flow in the ventilation space may be closed.

  Therefore, the non-ventilated wall portion 24 is provided with a convex portion 42 and a concave portion 43 that extend toward the ventilation port 23. Since the ventilation space is secured by the recess 43, the enlarged portion of the dust collection filter area (part corresponding to the non-venting wall portion 24) can reliably maintain the function as the dust collection filter. The performance of strong suction force due to the expansion of the dust collection filter area is fully demonstrated.

  Further, the convex portion 42 of the air-impermeable wall portion 24 has an arc shape along the outer peripheral side of the cord reel 6. The recesses 43 exist above and below the arc shape. That is, since the concave portion 43 is formed by forming the arc-shaped convex portion 42 in the non-venting wall portion 24, the configuration is simple.

  Furthermore, when winding the cord 6a around the cord reel 6, it is difficult to reduce the space for storing the cord 6a by the back surface of the convex portion 42, and the winding failure of the cord 6a is less likely to occur. Moreover, since the back surface of the convex part 42 is formed in circular arc shape, it has the effect that the cord 6a is wound in an aligned manner and is easy to wind.

  Furthermore, since the cord reel 6 is accommodated in the convex portion 42, the width of the filter case 7 and the dust collection filter 20 can be increased without increasing the overall length of the cleaner body 1.

  The dust removal means and dust removal drive will be described.

  As shown in FIG. 10, the vertical display line 1001 is a line indicating the center position of the suction port 5C of the blower 5A. The vertical display line 1003 is a line indicating the left side wall position of the cord reel 6 (side wall position close to the blower 5A).

  The vertical display line 1005 is a line indicating the left end side position of the dust removal rotary body 26. The vertical display line 1006 is a line indicating the right end side position of the dust removal rotary body 26.

  In the electric vacuum cleaner before improvement shown in FIG. 15, the length of the dust removal rotary body is the width from the vertical display line 1005 to the vertical display line 1003. On the other hand, the dust removal rotary body 26 of the embodiment of the present invention has a length from the vertical display line 1005 to the vertical display line 1006.

  The dust removal rotary body 26 of the embodiment of the present invention has a length that is longer by the L2 dimension. By extending this L2 dimension, dust removal by the dust removal rotating body 26 can be performed over a range nearly the entire length of the dust collection filter 20 whose area is enlarged.

  By removing the dust, the air permeability is restored over almost the entire length of the dust collection filter 20, so that the suction performance is improved.

  As shown in FIGS. 2, 6, 10, 11, and 12, the dust-removing rotating body 26 has the first reel 44, the second gear 45, and the third gear 40 that rotate the cord reel 6. Is done through.

  The first gear 44 is provided on the outer periphery of the right reel side wall of the cord reel 6. The right reel side wall is positioned away from the electric blower 5. The electric vacuum cleaner before improvement is provided on the outer periphery of the reel side wall on the left side of the cord reel 6, as shown in FIG. In the embodiment of the present invention, by providing the first gear 44 on the right side wall of the reel, the gear transmission mechanism of the dust removing rotator 26 that has been lengthened can be combined into a simple configuration.

  The outer periphery of the reel side wall includes the outer periphery of the reel side wall, the outer periphery of an annular flange provided closer to the inner side than the outermost peripheral surface, and the like.

  The first gear 44, the second gear 45, and the third gear 40 are spur gears. And since it arrange | positioned so that meshing | engagement of gears may be performed on the same plane and the gear transmission mechanism was made into the simple structure, an assembly is easy.

  As shown in FIG. 9, the second gear 45 is rotatably supported by the frame 28 of the filter case 7. That is, a support shaft 46 protruding from the frame 28 is provided, and the second gear 45 is rotatably supported by the support shaft 46 and is held by a retaining screw 47 through a washer 50. A sliding contact protrusion 48 that partially supports the side surface of the second gear 45 is provided on the frame 28.

  Since the second gear 45 is supported by the support shaft 46, the amount of rotational shake is small. Since the side surface of the second gear 45 is partially in contact with the sliding contact protrusion 48, there are few surfaces that make sliding contact, and the second gear 45 rotates smoothly.

  Since the rotation of the cord reel 6 is transmitted to the dust removing device (dust removing means) 25 through the first gear 44 and the second gear 45, the rotation is reliably transmitted, and the dust removing device (dust removing means) is smoothed. Is well done.

  That is, since the cord reel 6 facilitates assembly, the axis accuracy of the rotating shaft is not necessarily high. In addition, since the first gear 44 is provided on the outer periphery of the cord reel 6, the first gear 44 has a large amount of rotational deflection.

  The third gear 40 is provided at the end of the dust removal rotary body 26. Rotational vibration is likely to occur at the end, and the amount of rotational vibration of the dust removal rotating body 26 is increased by the length. In addition, since the third gear 40 is engaged and connected to the clutch 29 of the dust removing rotator 26, the amount of rotational shake increases.

  The relative rotational shake amount between the first gear 44 and the third gear 40 is about several millimeters. When the first gear 44 and the third gear 40 are directly meshed with each other, the meshing is disengaged during the rotation, or the lock is caused by the loose meshing.

  However, as in the embodiment of the present invention, the second gear 45 having a small rotational shake amount is interposed as an intermediate gear between the first gear 44 and the third gear 40 having a large rotational shake amount. It was possible to wipe out the lock caused by the disengagement during rotation and the engulfed engagement. Thereby, the rotation of the cord reel 6 is reliably transmitted to the dust removing device 25 (dust removing means), and the dust removing device 25 (dust removing means) operates smoothly, so that dust removal is performed well.

  The second gear and the third gear will be further described with reference to FIG.

  The horizontal display line 1007 is a tangent line in contact with the upper outer periphery of the cord reel 6. The vertical display line 1008 is a line that passes between the dust collection filter 20 and the convex portion 42 of the air-impermeable wall portion 24.

  The second gear 45 and the third gear 40 are located in a substantially triangular shape surrounded by the horizontal display line 1007, the vertical display line 1008, and the envelope of the cord reel 6.

  The upper third gear 40 and the lower second gear 45 are arranged vertically. Since the second gear 45 is disposed on the front side of the third gear 40, the second gear 45 can be provided on the outer side of the frame 28 of the filter case 7.

  When the third gear 40 and the second gear 45 are provided on the lower side of the filter case 7, the third gear 40 is on the lower side and the second gear 45 is on the upper side. However, the arrangement in which the second gear 45 comes to the front side does not change from the vertical arrangement.

  Further, by incorporating the filter case 7 into the cleaner body 1, the second gear 45 is combined with the first gear 44 of the cord reel 6. Since the first gear 44, the second gear 45, and the third gear 40 are configured such that the meshing overlaps on the same plane, variations in combination can be reduced.

  As can be understood from FIG. 12, if the third gear 40 is directly meshed with the first gear 44 of the cord reel 6 without providing the second gear 45, the outer diameter of the third gear is increased. It becomes considerably large. In relation to other components and members, the third gear having a large outer diameter cannot be arranged, or the related configuration is greatly changed.

  For example, if the dust removal rotating body 26 of the dust removal device 25 cannot be disposed on the upper part of the filter case 7, the ventilation opening 23 is blocked, so that the ventilation resistance increases and the suction work rate decreases. However, by providing the second gear 45 to be interposed, the third gear 40 and the dust removal rotator 26 can be arranged on the upper part of the filter 7, and the filter area can be expanded without increasing the airflow resistance.

  Such a problem is also solved by providing the second gear 45.

  Next, another embodiment will be described with reference to FIGS.

  The dust removal guide 49 is provided on the back surface, which is the downstream side surface of the dust collection filter 20. The dust collecting spring 20 of the dust removing device 25 repels the wave front of the dust collecting filter 20 surrounded by the dust removing guide 49 to remove dust adhering to the dust collecting filter 20.

  A resin reinforcing portion 60 is provided at the wave front bounced by the dust removal spring 27. Since the reinforcing part 60 is provided, damage to the wave front can be suppressed. Further, since the reinforcing portion 60 is hard, it is struck and vibrates well, and dust removal is performed well.

  Manual dust removal is performed with a filter cleaner (not shown). Dust removal is performed by rubbing the reinforcing portion 60 with a filter cleaner. Since the filter cleaner can be run along the dust removal guide 49, the filter cleaner can be easily operated.

  As shown in FIG. 14, the dust removal guide 49 is provided with a plurality of ribs 62 that connect the upper and lower guide members 61. Since the upper and lower guide members 61 are connected by the rib 62, the guide member 61 does not bend so as to escape even if the filter cleaner hits the guide member 61 during manual dust removal. For this reason, manual dust removal with the filter cleaning tool kept at the reinforcing portion 60 can be performed.

  The rib 62 is erected so as to stand on the rear side from the back surface of the guide member 61 so as to be placed in a state where it enters the wave of the dust collection filter 20. For this reason, the rib 62 does not hinder the repelling operation of the dust removal spring 27 and the filter cleaner, and dust removal is performed without any trouble.

The external appearance perspective view of the vacuum cleaner which concerns on the Example of this invention and shows the state which opened the cover. The perspective view which related to the Example of this invention, removed the upper main body case 3 of the cleaner body, and looked inside. The top view which concerns on the Example of this invention and shows the combination of a dust collection case and a filter case. FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3 according to the embodiment of the present invention. FIG. 4 is a sectional view taken along the line BB in FIG. 3 according to the embodiment of the present invention. The perspective view which concerns on the Example of this invention and looked at the filter case from the front side. The front view which concerns on the Example of this invention and looked at the filter case from the front side. FIG. 8 is a cross-sectional view taken along the line AA of FIG. 7 according to the embodiment of the present invention. FIG. 8 is a sectional view taken along line BB in FIG. 7 according to the embodiment of the present invention. The figure which concerns on the Example of this invention, and showed the arrangement | positioning relationship of an electric blower, a cord reel, and a dust removal apparatus. The figure which concerns on the Example of this invention, and showed the arrangement | positioning relationship of an electric blower, a cord reel, a dust removal apparatus, and a dust collection filter. The longitudinal cross-sectional view of the vacuum cleaner concerning the Example of this invention. The perspective view which concerns on the other Example of this invention, and looked at the dust collection filter from the back side. The perspective view of a dust removal guide according to another embodiment of the present invention. The comparison figure quoted for comparison with the present invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 5 ... Electric blower, 6 ... Cord reel, 20 ... Dust collection filter, 1 ... Vacuum cleaner main body, 7 ... Filter case, 25 ... Dust removal means, 44 ... First gear, 23 ... Ventilation port, 24 ... Non-ventilated wall .

Claims (4)

An electric blower, a cord reel, and a vacuum cleaner main body that detachably stores a dust collection filter disposed upstream of the electric blower, and a filter case that is disposed in the vacuum cleaner main body and contacts the dust collection filter. A dust removing means provided on the filter case for removing dust adhering to the dust collecting filter;
The cord reel is arranged so that the rotation axis is in a horizontal direction and has a first gear on the outer periphery of the reel side wall,
The filter case has a ventilation port through which air that has passed through the dust collection filter flows to the electric blower, and a non-ventilated wall portion that is provided next to the ventilation port and seals the passage of air,
The dust collection filter has a size extending from the ventilation opening of the filter case to the non-ventilated wall,
The non-venting wall portion has an arc shape along the outer periphery side of the cord reel, and has a convex portion protruding on the dust collecting filter side, and a concave portion provided on the upper and lower sides of the convex portion, and a convex portion And a recess extends toward the vent,
The vacuum cleaner characterized in that the dust removing means has a horizontally long dust removing rotator which is provided on the upper side of the filter case and extends from the upper side of the ventilation port to the concave portion on the upper side of the non-venting wall portion. The vacuum cleaner according to claim 1,
A third gear provided at an end of the dust removal rotating body;
A second gear interposed between the first gear and the third gear;
The second gear is disposed below the third gear;
The electric vacuum cleaner, wherein the meshing of the gears of the first gear, the second gear, and the third gear is performed on the same plane. The vacuum cleaner according to claim 1,
The vacuum cleaner, wherein the dust collection filter is bent toward the non-ventilated wall by the suction force of the electric blower. The vacuum cleaner according to claim 1,
The dust collection filter is formed of a breathable member folded in a waveform,
The dust removal rotating body includes a dust removal spring spirally wound around the periphery,
By the rotation of the dust removal rotating body, the dust removal spring removes dust over the width range of the dust collection filter extending from the ventilation port of the filter case to the non-venting wall portion by flipping the back surface, which is the downstream side surface of the dust collection filter. A vacuum cleaner characterized by

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