JP3416273B2 - Vacuum cleaner cord winding device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cord winding device for winding and holding a power cord for supplying power to an electric blower on a cord reel. 2. Description of the Related Art An electric vacuum cleaner comprises a dust collecting chamber to which a suction device is connected via a bellows hose and an extension pipe, and an electric blower having the suction side facing the dust collecting chamber, made of resin. A configuration in which dust is sucked through the suction tool pressed against a cleaning surface by a user's operation into a dust collection chamber which is juxtaposed inside the main body case and evacuated by operation of the electric blower. Has become. [0003] Such a vacuum cleaner is generally provided with a power cord that can be connected to a commercial power supply to supply power to the electric blower. A power take-up device for winding and holding a power cord is provided inside the main body case, and at the time of work, a desired action range is secured by pulling out an appropriate length of power cord from the power take-up device. During operation, the entire length of the power cord is wound around the cord winding device and stored in the main body case so as not to hinder the storage of the vacuum cleaner in a limited place in the home. The above-mentioned cord winding device is disclosed in Japanese Patent Laid-Open No. 4-218131.
As disclosed in Japanese Unexamined Patent Application Publication No. Hei 5-30689 and the like, a cord reel for winding a power cord is rotatably mounted on one surface of a plate-shaped reel base, and the reel base is attached to a main body. The power supply cord is fixed to the case and is disposed in the vicinity of one side (rear position or side position) of the electric blower. The power supply cord is wound by the spring force of a spring (spring spring) built in the cord reel. When the cord is pulled out, the return rotation of the cord reel due to the spring force is restrained by a stopper to maintain the drawn length. [0005] In the above-described electric vacuum cleaner, when the power cord is drawn with a short length of the power cord, and the power cord is operated with the power cord remaining on the cord reel, the cord is not operated. The power cords that are closely overlapped on the reel generate heat when energized, and may cause insulation breakdown due to overheating. Therefore, conventionally, an electric vacuum cleaner has been put to practical use in which exhaust air from the electric blower is guided to a position where a cord reel is provided, and is blown to the cord reel to cool a power cord to prevent the overheating. However, in the conventional general configuration, the exhaust gas is merely blown to the outside of the power cord held on the code reel, and particularly, in a state where the power cord overlaps the winding surface of the cord reel. At one time, there was a problem that sufficient cooling was not performed and a desired overheating prevention effect was not obtained. Further, there is a cord winding device in which ventilation windows are provided on side walls rising on both sides of the winding surface of the code reel so that exhaust air is blown from the side of the code reel. However, also in this configuration, in addition to the power cord wound outside, only heat exchange is performed between the power cord and the exhaust that overlap along the side wall, and a sufficient cooling effect cannot be obtained. was there. The present invention has been made in view of such circumstances, and it is possible to effectively cool a power cord held on a cord reel by blowing exhaust air from an electric blower, and to obtain a sufficient overheating prevention effect. An object of the present invention is to provide a cord winding device for a vacuum cleaner that can be obtained. A cord winder for a vacuum cleaner according to the present invention winds and holds a power cord for supplying power to an electric blower that evacuates a dust collection chamber. In the cord winder of the electric vacuum cleaner which blows the exhaust air of the electric blower to cool the power cord, the cord reel includes a plurality of parts.
A plurality of support projections are provided on the winding surface of the power cord of the cord reel , the fixing projection being provided with a gap between the winding surface and the power cord to support the power cord.
Boss for tightening the set screw.
Part . According to the present invention, the power cord on the winding surface is supported by the support projection provided on the winding surface of the cord reel in a state where the power cord is lifted in the radial direction. A suitable gap is secured between the power supply cord and the power supply cord wound on the cord reel, and the gap is cooled from both inside and outside. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments thereof. FIG. 1 is a plan view showing an internal structure of a vacuum cleaner provided with a cord winding device according to the present invention, and FIG. 2 is a side view showing a part of the vacuum cleaner. As shown in the figure, this vacuum cleaner has large-diameter main wheels 10, 10 having a main case 1 composed of a lower case 1a and an upper case 1b attached to the rear left and right sides of the lower case 1a.
Similarly, it is supported by a caster wheel 11 attached to the lower part on the front side. Upper case 1b, lower case 1a
The front half of the lower case 1a is openably and closably covered from the front side by an upper lid cover 1c whose rear portion is pivotally supported by the front upper edge of the upper case 1b. . FIG. 1 shows a state in which the upper case 1b and the upper cover 1c have been removed. The inside of the lower case 1a is separated from a dust collecting chamber 13 on the front side and a blower chamber 14 on the rear side by a partition rib 12 crossing a substantially central portion in the width direction. Dust chamber 13
Front part is covered by a front cover 21 and a bellows hose
A suction pipe 30 connected to a suction tool (not shown) is connected via 31, and a dust collecting paper pack 3 is detachably mounted inside the dust collection chamber 13 so as to face a connection end of the suction pipe 30. It is installed. The upper cover 1c is opened and closed when the paper pack 3 is attached and detached, and the upper portion of the dust collection chamber 13 in which the paper pack 3 is mounted is covered by closing the upper cover 1c. On the other hand, inside the blower room 14, the electric blower 4
And the cord winding device 5 according to the present invention are mounted side by side in the width direction. The electric blower 4 is configured such that a turbo-type blower 41 is integrated with one side of an electric motor 40 as a drive source, and a suction port of the blower 41 is located on the front side, that is, the partition rib.
Inserted into the blower room 14 toward the 12 side,
In addition to being supported by the upper case 2b and the lower case 1b, the upper case 1b is fixed to the lower case 1a. The partition rib 12 at the front of the blower room 14 has a blower
A communication port (not shown) that opens into the dust collection chamber 13 is provided at a position aligned with the suction port of the dust collection chamber 41. When the blower 41 is driven to rotate by the electric motor 40, the interior of the dust collection chamber 13 It is evacuated and evacuated by the intake of the blower 41 generated through the mouth. The paper pack 3 mounted in the dust collection chamber 13 has air permeability, and the vacuum exhaust driven by the electric blower 4 is performed by the paper pack 3.
The paper pack 3 has a function of collecting dust sucked through the suction pipe 30 in association with the evacuation. A paper pack 3 is provided in the communication opening of the rib 12.
A filter is installed to collect dust that passes through the
The air intake into the blower 41 is performed after the air is cleaned through two-stage dust collection by the paper pack 3 and the filter. The exhaust port 44 of the electric blower 4 is formed on the peripheral surface of the housing of the electric motor 40, and the intake by the blower 41 is
The gas flows through the inside, and after the inside cools down, it is exhausted. The cord winding device 5 is for winding and holding a power cord 50 for supplying power to the electric motor 40, and is provided on one side (rear side) of the reel base 51 for winding the power cord 50. Is supported in a cantilever manner in a rotatable manner. FIG. 3 shows a cord winding device 5 viewed from below.
FIG. 4 is a sectional view taken along line IV-IV in FIG. As shown in the figure, the reel base 51 is a rectangular flat plate made of resin, penetrating a substantially central portion thereof, and supporting a shaft 53 of the code reel 52.
An insertion hole 54 is formed for inserting a through hole. On the other side (front side) of the reel base 51, a substrate chamber is provided at a position after the insertion hole 54.
A control board 6 is mounted in the substrate chamber 60. The control board 6 is a printed circuit board on which a circuit for a predetermined control operation including starting and stopping of the electric blower 4 is formed. A radiator plate 7 is continuously provided on one side of the control board 6. . A triac 61 as a circuit component for controlling the start and stop of the electric blower 4 is mounted on the heat radiating plate 7, and is configured to emit heat during operation of the triac 61. As shown in FIG. 3, the cord reel 52 has a drum-shaped winding surface 55 serving as a winding core of the power supply cord 50, in which the halves which are molded products made of resin are coaxially butted together and integrated.
On both sides of the reel base 51, a support shaft 53 rotatably fitted to the axial center of the power supply cord 50 is provided on both sides of the reel base 51. The support shaft is inserted into the insertion hole 54, and the engaging shaft formed in the insertion hole 54 is
The leading end of the 53 is engaged with the reel base 51 and is supported. The two halves are integrated by tightening a plurality of set screws 52a, 52a,... Thus, the power cord 50
Set screw on the part with the largest diameter within the range that does not hinder the winding of
Since the 2a, 52a,... Are arranged, the assembling strength is increased, and the cord reel 52 which is firmly integrated can be obtained. Inside the winding surface 55 of the code reel 52, a code chamber 8 is formed between the two halves. FIG.
5 is a cross-sectional view taken along line VV in FIG. 3, showing a cross-section of the code reel 52 including the code chamber 8. As shown in the drawing, the winding surface of the code reel 52
A plurality (six in the figure) of support projections 5a, 5a,... Protruding outward in the radial direction are arranged at equal intervals in the circumferential direction. In the drawing, 52b, 52b...
Are screw holes for fastening 52a, 52a, and half of the support projections 5a, 5a are also provided as bosses for fastening the set screws 52a, 52a,. A power cord 50 wound around a cord reel 52
5 is inserted into the code chamber 8 through a cutout 55a provided in a part of the winding surface 55, as shown by a broken line in FIG. 5, and is fixed at a predetermined position. As shown in FIG. 3, a pair of ring electrodes 58, 58 are formed concentrically around the axis on the surface facing the reel base 51 outside the code chamber 8, and these are formed of a reel base. A sliding ring is formed by sliding contact with a sliding contact (not shown) protruding from 51. A power supply cord 50 fixed in the code chamber 8 is connected to the ring electrodes 58, 58, and power is supplied from the power supply cord 50 to the front side of the reel base 51 via the slip ring. is there. In FIG. 5, the structure for fixing and connecting the power cord 50 inside the code chamber 8 is omitted. The power cord 50 fixed in the cord chamber 8 as described above is drawn out through the notch 55a, and is first wound around the winding surface 55 as shown by a two-dot chain line in FIG. Further, as shown in FIG. 3, it is wound around the previous winding layer in such a manner as to sequentially overlap each other, and is wound and held on the code reel 52. In the above-described winding, the support projections 5a, 5a,... Protruding from the winding surface 55 as described above are provided at a plurality of circumferential positions on the power cord 50 wound around the winding surface 55. And the contact portion is supported in a state of being lifted in the radial direction of the cord reel 52. As a result, between the winding surface 55 and the power cord 50, as shown in FIG.
Are formed over substantially the entire circumference. On the side wall 56 rising on one side of the winding surface 55, there are provided a plurality of ventilation windows 56a, 56a,. Are formed, and ventilation is possible through the ventilation windows so as to cross the code reel 52 in the width direction.
Then, when the power cord 50 is wound and held on the winding surface 55, the ventilation flows along the outside of the power cord 50 and is formed between the winding surface 55 and the power cord 50. It will flow through the gap. On the other hand, an annular spring chamber 9 is formed around the insertion portion of the support shaft 53 on the surface of the code reel 52 that is not opposed to the reel base 51, and extends along the inner periphery of the side wall 57 on the same side. The spring chamber 9 is closed by a cover plate 90 fixed with screws.
Inside, a mainspring 91 is supported by a support shaft 53 penetrating the spring chamber 9.
And the peripheral edge of the cover plate 90 are housed with both ends engaged with each other. FIG. 6 is an exploded perspective view of the spring chamber 9 and the cover plate 90. As shown in the figure, on the bottom surface of the spring chamber 9, a plurality (three in the figure) of ridges 92 are formed radially from the insertion hole of the support shaft 53 formed at the shaft center. Also, on the inner surface of the lid plate 90 corresponding to the bottom surface of the spring chamber 9, a plurality of slightly wide (four in the figure) ridges 93, as shown by the broken lines in the figure, are similarly provided. It is formed in. As shown in FIG. 3, these springs abut against both side edges of a mainspring spring 91 incorporated in the spring chamber 9, and a slight distance is formed between the side edge and the bottom surface of the spring chamber 9 and the inner surface of the cover plate 90. It acts to form an appropriate gap. The cord winding device 5 configured as described above
As shown in FIG. 1, the lower part of the reel base 51 is fitted into a predetermined position facing one side of the electric blower 4 inside the blower chamber 14, and the tip of a support shaft 53 projecting to the other side of the cord reel 52 is lowered. The reel base 51 and the support shaft are engaged with a part of the inner wall of the case 1a by attaching the upper case 1b performed in this state.
53 and the lower case 1a are clamped and fixed between the lower case 1a. With this fixation, the support shaft 53 is restrained from rotating about the axis together with the movement in the vertical and axial directions, and the cord reel 52 is fitted with the support shaft 53 and the insertion hole 54. It can rotate freely with sliding in the part, this rotation is
This is caused by a rotation bias in one direction by a mainspring 91 in the spring chamber 9. Power cord 50 wound on a cord reel
As shown in FIG. 1, the spring is projected outward from a not-shown draw-out hole formed in the lower rear portion of the lower case 1a.
The cord reel can be appropriately pulled out with the rotation of the cord reel against the spring force of 91, and the length of the drawn-out reel is maintained by braking applied to the outer periphery of the cord reel by a stopper (not shown). When the stopper is released, the power cord 50 is wound around a cord reel that rotates by the spring force of the mainspring 91. As the power cord 50 is pulled out or wound as described above, the mainspring spring 91 inside the spring chamber 9 is wound around the inner support shaft 53 or the outer cover plate 90. The side edges are the ridges 92, 92 ... and the ridges 93, 93 ...
Accordingly, since there is a gap between the bottom surface of the spring chamber 9 and the inner surface of the lid plate 90, the resistance acting on the side edge at the time of the winding can be reduced. As a result, the power cord 50 can be smoothly pulled out and wound up, and a good feeling of use can be obtained. In addition, when the cord winding device 5 is assembled, a predetermined rotational bias is applied to the cord reel 52. The amount of pre-winding of the mainspring 91 can be set small, and the diameter of the cord reel 52 can be reduced by downsizing the mainspring 91, so that it can be arranged in a limited space inside the main body case 1. It will be easier. The power cord 50 pulled out from the cord winding device 5 is connected to a commercial power supply, and the electric blower 4 operates by power supply from the power cord 50 to evacuate the dust collecting chamber 13 to a vacuum. As described above, the intake air from the electric blower 4 flows inside the electric motor 40 and is exhausted from the exhaust ports 44 formed on the peripheral surface. As shown in FIG. 4, the reel base 51 of the cord winding device 5 facing one side of the electric blower 4 has a large number of ventilation holes 59 penetrating in the thickness direction. ,
A large number of ventilation holes 70, 70,... Are formed through the heat sink 7 covering a part of the reel base 51, and the exhaust of the electric blower 4 is exhausted as shown by white arrows in FIG. , Vents 70, 70…
After passing through the ventilation holes 59, 59, and flowing out to the back side of the reel base 51 and being sprayed on the side surface of the code reel 52,
It is discharged to the rear of the main body case 1. Due to the flow of the exhaust gas, the triac 61 mounted on the radiator plate 7 is cooled by heat exchange with the exhaust gas generated through the radiator plate 7, and is wound and held on the cord reel 52. The power cord 50 is cooled by direct heat exchange with the exhaust gas. As described above, a plurality of ventilation windows 56a are formed in the side wall 56 of the code reel 52, and the other side wall 57 is formed.
A similar ventilation window is also formed, and the exhaust air blown to the code reel 52 traverses the code reel 52 in the width direction through these ventilation windows, and is wound and held on the winding surface 55 of the code reel 52. Flows along the outside of the power cord 50, and flows through a gap formed between the winding surface 55 and the power cord 50 by the action of the support protrusions 5a. Therefore, heat exchange between the exhaust and the power cord 50 occurs from both inside and outside, and the power cord having a large amount of winding on the cord reel 52 and overlapping in a plurality of layers.
Even if it is 50, it is effectively cooled, and it is possible to reliably prevent the power cord 50 from being overheated due to power supply to the electric blower 4. As described in detail above, in the cord winding device for a vacuum cleaner according to the present invention, the power cord wound around the cord reel by the support projection provided on the winding surface of the cord reel. Is supported with a gap between it and the winding surface, so that the exhaust of the electric blower is ventilated through this gap, so that the power cord can be effectively cooled from both the inside and outside, satisfying the requirements. The present invention has excellent effects, such as obtaining a necessary overheating prevention effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing an internal structure of a vacuum cleaner provided with a cord winding device according to the present invention. FIG. 2 is a partially cutaway side view of the vacuum cleaner provided with the cord winding device according to the present invention. FIG. 3 is a plan sectional view of the cord winding device according to the present invention. FIG. 4 is an arrow view taken along line IV-IV in FIG. 3; FIG. 5 is a cross-sectional view of the code reel taken along line VV in FIG. 3; FIG. 6 is an exploded perspective view of a spring chamber. [Description of Signs] 1 Body case 4 Electric blower 5 Cord winder 5a Support projection 7 Heat sink 13 Dust collection chamber 14 Blower room 50 Power cord 51 Reel base 52 Code reel 53 Support shaft 55 Winding surface 56 Side wall 56a Ventilation Window 57 Side wall 59 Vent 70 Vent

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Rizo Kobayashi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Kenichiro Toi 2-chome Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (56) Reference JP-A-5-38317 (JP, A) Japanese Utility Model Showa 50-39060 (JP, U) Japanese Utility Model Showa 50-56061 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) A47L 9/26

Claims (1)

(1) The exhaust of the electric blower is blown to a cord reel for winding and holding a power cord for supplying power to an electric blower for evacuating the dust collection chamber. In the cord winder of a vacuum cleaner adapted to cool the cord reel, the code reel includes a plurality of parts that are set on set screws.
A plurality of support projections are provided on the winding surface of the power cord of the code reel, with a gap between the winding surface and the power cord to support the power cord.
A cord winding device for a vacuum cleaner , wherein a part of the projection is formed as a boss for tightening the set screw .