JP2007099442A - Cord housing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cord housing device capable of smooth pay-out/take-up of a cord. <P>SOLUTION: The cord housing device is provided with a framework 1, a rotating disc 4 provided inside the framework and having a rotary shaft, a winding barrel 3 formed to be symmetrically spread like stairs into a skirt part thereof around the rotary shaft as an axis of symmetry and provided with the rotating disc 4 in one end thereof and to be extended/shrunken in the axial direction by folding the stairs so as to house the cord, a slide disc 22 integrally provided with the winding barrel 3 on a side opposite to the side provided with the rotating disc, and a cylindrical member 20 provided on the same shaft with the rotary shaft and to be integrally rotated with the rotating disc so as to cover the winding barrel and formed with a spiral groove to be engaged with the peripheral part of the slide disc 22 in the inner peripheral surface thereof. The slide disc 22 is moved in the axial direction by rotation of the cylindrical member 20 integrally rotated with the rotating disc rotated by paying out/taking up the cord, and the winding barrel houses the cord 7 in the stairs part or pays out it while extending or shrinking in response to the amount of the movement of the slide disc. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cord storage device used in an electric device such as a vacuum cleaner.

  As a cord storage device for a power cord used in an electric device, a form as shown in FIGS. 16 and 17 is common. Such a cord storage device has a structure in which the power cord 50 is wound around a winding drum 53 that is fixed to the center of the shaft through the through hole 52 by the rotation of the turntable 51.

Patent Document 1 discloses a vacuum cleaner including a cord storage unit that can be used with a small torque for inserting and removing the power cord in order to effectively use the space of the power cord storage unit.
JP-A-9-327422

  However, in the apparatus shown in FIG. 16 and FIG. 17, since the power cord is irregularly wound around the winding drum, if the axial length of the winding drum is longer than a predetermined length of the power cord diameter, There was a problem that the power cord wound earlier and the power cord wound later were entangled. Further, the cord storage portion disclosed in Patent Document 1 has a problem that it is not always neatly wound around the conical inner drum 9 due to fluctuations in the tension at which the power cord is wound. is there.

  In the present invention, in order to solve such a conventional problem, even if the axial length of the winding drum around which the power cord is wound is increased, the electric cord is smoothly wound without being entangled at the beginning of winding. An object of the present invention is to provide a cord storage device that can be taken out and pulled out.

 A frame, a rotating disk provided in the frame and having a rotation axis, and having a stepped hem-expanding shape with the rotation axis as a symmetric axis, and the rotating disk is provided at one end thereof, and the staircase is folded. A winding drum that can be expanded and contracted in the axial direction, accommodates a cord, a slide disk that is integrally provided on the opposite side of the rotating disk arrangement of the winding drum, and coaxial with the rotating shaft so as to cover the winding drum And a cylindrical member having a spiral groove formed on the inner peripheral surface thereof and engaged with the outer peripheral portion of the slide disk, and rotated by drawing and winding the cord. The slide disk moves in the axial direction by the rotation of a cylindrical member that rotates integrally with the board, and the cord is stored in or pulled out from the staircase portion while the winding drum expands and contracts according to the amount of movement of the slide disk. To do .

  With the cord storage device of the present invention, the cord can be smoothly pulled out and taken up.

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

[First Embodiment]
As a first embodiment, a case where the cord storage device of the present invention is applied to a vacuum cleaner will be described with reference to FIGS. In FIG. 1, a winding drum that can be expanded and contracted in the axial direction for winding a power cord 7 (hereinafter referred to as “cord 7”) so as to cover an outer periphery of a fan motor 2 built in a frame 1 of a vacuum cleaner. 3 is fixed coaxially with the fan motor 2. A rotating disc 4 is mounted on the rear side of the fan motor 2 of the winding drum 3 so as to be rotatable coaxially with the winding drum 3. Further, the outer peripheral portion of the rotating disk 4 is elastically supported by a plurality of cylindrical rollers 72 via a spring 71 on a part of the frame 1 as shown in FIG.

  A part of the cord 7 is fixed to a fixing bracket 17 provided in the vicinity of the body winding 3, and a cord introduction hole (provided in the frame body 1 through a through hole 5 provided in the vicinity of the outer peripheral portion of the rotating disk 4). (Not shown)). Further, the cord 7 is wound around the outer periphery of the winding drum 3 by the rotation of the rotating disk 4. In addition, when the outlet 6 attached to one end of the cord 7 is pulled out from the outlet storage portion 6 a in which the outlet 6 is stored, the rotating plate 4 rotates and the winding drum 3 is removed from the through hole 5 provided in the rotating plate 4. The power cord 7 housed in the is pulled out.

  Further, in the present embodiment, as shown in FIG. 2, the mainspring spring 8 is attached to the mainspring spring storage chamber 10 provided inside the rotating disk 4 so that the cord 7 is wound by a predetermined rotational driving force. ing. One end of the spring spring 8 is fixed to a fixed portion that supports the rotating shaft 9 of the rotating disk 4, and the other end is fixed to a part of the inner peripheral wall of the spring spring storage chamber 10. The mainspring spring 8 expands in accordance with the amount of rotation of the rotating disk 4 when the cord 7 is pulled out, and the spring force is charged. When the drawing of the cord 7 is stopped at a predetermined length, the rotating disk 4 is rotated (rotation in the direction in which the cord 7 is rewound) while maintaining the spring force charged by the brake means as shown in FIG. It is designed to be braked. By depressing the button 11 of the brake means in such a state, the brake 13 is moved to the release side, the restriction of the rotating disk 4 is released, the rotating disk 4 is rotated by the spring force accumulated in the mainspring spring 8, and the cord 7 is retracted and accommodated in the winding drum 3.

  Next, a mechanism in which the cord 7 is wound around the winding drum 3 and stored in the cord storage portion will be described.

A cylindrical member 20 is disposed so as to be coaxial with the winding drum 3 so as to cover the winding drum 3 so as to be rotatable integrally with the rotating disk 4. On the inner peripheral surface of the cylindrical member 20, spiral grooves 21 are formed at a predetermined pitch. Further, a slide disk 22 is provided integrally at the tip of the winding drum 3 coaxially with the winding drum 3, and an outer peripheral portion thereof is engaged with the spiral groove 21. As the cylindrical member 20 rotates integrally with the rotating disk 4 by pulling out and retracting the cord 7, the slide disk 22 reciprocates in the axial direction along with the rotating direction of the spiral groove 21. In addition, the winding drum 3 has a step-like truncated cone shape spreading toward the direction of the turntable 4, and is formed to be extendable by folding the steps in the axial direction. FIG. 5 shows a specific configuration in which a part of the cord storage portion is cut away. The cord 7 is introduced from a cord introduction hole (not shown) provided in the axial direction of the turntable 4 of the frame 1 and wound through a through hole 5 provided near the outer periphery of the turntable 4. A part of the cord 7 is fixed in the vicinity of the tip of the barrel 3. Further, a slide disk 22 is provided integrally with the winding drum 3 at the tip of the winding drum 3.

  As shown in FIG. 6, the stairs 23 constituting the winding drum 3 are connected to each other in a hook shape, and have a structure that is easy to fold. As the cylindrical member 20 rotates, the slide disk 22 moves according to the pitch of the spiral groove, and the winding drum 3 expands and contracts in the axial direction. For example, when the slide disk 22 moves in the direction of the rotating disk 4 (when the cord 7 is pulled out), the hook-shaped staircase 23 is folded and moves in the direction in which the winding drum 3 contracts. ing. Further, when the cord 7 is pulled into the winding drum 3, the staircase 23 connected in a hook shape is extended so that the cord 7 is wound up from the extended staircase closer to the rotating disk 4. Yes. As the material of the winding drum 3, for example, a flexible material having excellent durability such as PP (polypropylene) is used. Each step has a width slightly larger than the diameter of the cord 7 so that the cord 7 can be accommodated. The height is set so as to be within a predetermined number of turns of the cord for each staircase. For example, in the case of one winding in each step, the cord can be stably stored in each step 23 when the cord is wound by making it higher than the cord diameter. In the case of two windings, the same effect can be obtained by making the cord diameter higher than twice the cord diameter.

  Specifically, when the cord 7 is placed in each staircase 23 for each turn, the staircase 23 expands and contracts in the axial direction every time the spiral groove 21 of the cylindrical member 20 is wound around the staircase 23 as shown in FIG. However, it is formed at a pitch corresponding to the amount of movement. When winding the cord 7 twice on each staircase 23, as shown in FIG. 8 and FIG. 9, the spiral groove 21 is formed close to every two grooves and moves to each staircase 23 every two turns. It is formed corresponding to. Thus, since it moves to the next staircase 23 every two turns, it can be wound up smoothly. Further, in FIG. 10, the configuration of each step 23 of the winding drum 3 is made larger than the diameter of the cord 7, so that it is difficult to drop off from the winding position of each step, so that the winding can be stably performed. The height of the stairs is preferably about 1.5 times the diameter of the cord 7 or more.

  In the cord winding device having such a configuration, when the cord 7 is pulled out, the hook of the staircase from which the cord 7 is pulled out from the staircase on the rotating disc 4 side is pushed in the direction of the rotating disc 4 and contracts. When 7 is pulled in, it is extended from the turntable 4 side and wound around the staircase 23. Thus, the cord 7 is always stably wound and pulled out from the rotating disk 4 side.

  In the embodiment described above, the case where the cord 7 is wound is exemplified by the case where the driving is performed by the spring force charged in the mainspring spring 8 provided in the rotating disk 4 when the cord 7 is pulled out. As another method, for example, the turntable 4 may be driven by a motor.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. Hereinafter, parts similar to those described in the first embodiment are omitted, and only different parts will be described.

  11 and 12 show a case where the second cord storage device of the present invention is applied to a vacuum cleaner. A winding drum 30 that winds the cord 7 is fixed coaxially with the fan motor 2 so as to cover the outer periphery of the fan motor 2 built in the frame 1 of the electric vacuum cleaner. In addition, a rotating disc 4 is mounted on the rear side of the fan motor 2 of the winding drum 30 so as to be rotatable coaxially with the winding drum 30. Further, the outer peripheral portion of the rotating disk 4 is elastically supported by a plurality of cylindrical rollers 72 via springs attached to the frame 1 as shown in FIG. Further, the spring disc 8 is attached to the rotary disk 4 as in the first embodiment, and the cord 7 is rewound by the spring force charged in the mainspring spring 8 when the cord 7 is pulled out. ing. Since the winding drum 30 is shaped like a truncated cone in the direction of the rotary disk 4, the wound cord 7 is pushed by the cord 7 wound later and the tip of the truncated cone (part with a small diameter). ) Can be taken up in a smooth direction. In this way, it is possible to provide a cord storage device that can reliably wind and pull out the cord 7 with a simple structure.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. Hereinafter, parts similar to those described in the above embodiment are omitted, and only different parts will be described.

  FIG. 13 and FIG. 14 show a case where the third cord storage device of the present invention is applied to a vacuum cleaner. A winding drum 31 for winding the cord 7 is fixed coaxially with the fan motor 2 so as to cover the outer periphery of the fan motor 2 incorporated in the frame 1 of the electric vacuum cleaner. In addition, a rotating disk 4 is attached to the winding drum 31 at the rear side of the fan motor 2 so as to be rotatable coaxially with the winding drum 31. The rotating disk 4 is supported by an elastic cylindrical roller 72 via a spring attached to the frame 1 of the vacuum cleaner as shown in FIG. Further, the spring disc 8 is attached to the rotary disk 4 as in the first embodiment, and the cord 7 is rewound by the spring force charged in the mainspring spring 8 when the cord 7 is pulled out. ing. Similarly to the above-described embodiment, a brake mechanism that holds the spring force charged in the mainspring spring 8 when the cord 7 is pulled out and is driven when the cord 7 is rewound is also provided. When the cord 7 is pulled out and wound, the cord 7 is sandwiched between the cord introduction hole (not shown) of the frame 1 and the rotating disc 4 so that the cord 7 is coaxial with the rotating disc 4. A pair of pinch rollers 41 and 42 are provided. The circumference of the pair of rollers 41 and 42 is made equal to the length of the pitch circle of the gear 39 and the gear 40, and one of the pair of rollers 41 and the gear 39 are connected by the shaft 43. It is configured to be connected to a gear provided on the outer periphery of the rotating disk 4. With such a configuration, the winding / drawing amount of the cord 7 by the rotation of the rotating disk 4 and the winding / drawing amounts of the pair of pinch rollers 41 and 42 can be made the same.

  When the cord 7 is pulled out by such a cord storage mechanism, the pair of rollers 41 and 422 sandwiching the cord 7 rotates and charges the mainspring spring 35 attached to the turntable 4 via a gear. The turntable 4 also rotates. At this time, the tension generated when the cord 7 is pulled out is generated up to the pair of rollers 41 and 42 sandwiching the cord 7, but no tension is generated on the rotating disk 4 side from the pair of rollers 41 and 42. For this reason, the cord 7 can be wound around the winding drum 31 with a space and further pulled out while being loosened by the rotating disk 4, so that it can be pulled out smoothly without being entangled.

  Further, the cord 7 is wound by releasing the spring of the mainspring spring 8. In order to release the brake, the brake 13 that brakes the rotating disk 4 is released by pushing the winding button 11 (see FIG. 4) provided on the upper part of the main body of the vacuum cleaner, and the spring spring 8 is released from the charge. Winding is performed. When the charge of the mainspring spring 8 is released, the rotating disk 4 rotates in the direction in which the cord 7 is wound, and the pair of rollers 41 and 42 connected by gears also rotate. Since the rotating disk 4 and the pair of rollers 41 and 42 feed the power cord with the same amount, the rotating disk 4 winds the cord 7 around the winding drum 31 with the pair of rollers 41 and 42. Only do. Since no tension is generated in the cord 7 on the rotating disk 4 side from the pair of rollers 41 and 42, the cord 7 is wound around the winding drum 313 with a space. The cord 7 wound earlier is pushed into the end of the winding drum 31 where the cord 7 is fixed, and the cord 7 is turned from the end of the fixing portion 17 by the strainer of the cord 7 fed later. Rolled up side by side. Thus, the cord 7 can be smoothly wound around the winding drum 31.

  In the embodiments described so far, the cord 7 is wound up by the mainspring spring 8. However, as another method, for example, a motor can be used. FIG. 15 shows an embodiment in which a motor 91 and a battery 92 are incorporated. By providing the motor 91 and the battery 92, the user can take up / pull out the cord 7 with only a button operation. In this case, the winding / drawing can be performed at a uniform speed as compared with the case where the mainspring 8 is mounted, so that not only a more stable operation is possible, but also the power cord which is a burden on the user The load on the drawer can be eliminated. Moreover, although the case where the rotating disk is provided on the bottom part on the hem spreading side of the winding drum 3 has been described, a slide disk may be provided on the hem spreading side to reverse the positional relationship. In the embodiment, the vacuum cleaner is taken as an example, but the present invention is not limited to this, and may be applied to various electric devices such as an electric mosquito trap and an iron.

It is a figure which shows the whole structure of the cord storage apparatus of the 1st Embodiment of this invention. It is a figure which shows the winding mechanism of the code | cord | chord of the cord storage apparatus of the 1st Embodiment of this invention. It is a figure which shows the support mechanism of the rotary disk of the cord storage apparatus of the 1st Embodiment of this invention. It is a figure which shows the brake mechanism of the rotary disk of the cord storage apparatus of the 1st Embodiment of this invention. It is a figure which shows the structure inside the cord storage apparatus of the 1st Embodiment of this invention. It is a figure which shows the structure of the winding drum of the cord storage apparatus of the 1st Embodiment of this invention. It is a figure which shows the structure of the one part cross section of the cylindrical member of the cord storage apparatus of the 1st Embodiment of this invention. It is a figure which shows the structure of the one part cross section of the cylindrical member of the cord storage apparatus of the 1st Embodiment of this invention. It is a figure which shows the cross section of the code | cord | chord accommodated in the winding drum of the cord storage apparatus of the 1st Embodiment of this invention. It is a figure which shows the cross section of the other code | cord | chord accommodated in the winding drum of the cord storage apparatus of the 1st Embodiment of this invention. It is a figure which shows the structure of the whole cord storage apparatus of the 2nd Embodiment of this invention. It is a figure which shows the structure of the winding drum of the cord storage apparatus of the 2nd Embodiment of this invention. It is a figure which shows the structure of the whole cord storage apparatus of the 3rd Embodiment of this invention. It is a figure which shows the structure seen from the side surface of the cord storage apparatus of the 3rd Embodiment of this invention. It is a figure which shows the other structure of the cord winding mechanism of the cord storage apparatus of the 3rd Embodiment of this invention. It is a figure which shows the cross-section of the conventional cord winding mechanism. It is a perspective view of the conventional cord winding apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame 2 Fan motor 3 Winding drum (1st Embodiment)
4 Rotating disc 5 Through hole 7 Power cord 8 Spring spring 20 Cylindrical member 21 Spiral groove 22 Slide disc
30 winding drum (second embodiment)
31 winding drum (third embodiment)
41, 42 A pair of rollers 44 Running wheels of the vacuum cleaner

Claims (3)

A frame and a turntable provided in the frame and having a rotation axis;
A winding drum that has a staircase-shaped hem-spread shape with the rotational axis as a symmetric axis and is provided with the rotating disc on one end side thereof, and can be expanded and contracted in the axial direction by folding the staircase,
A slide disk provided integrally with the top of the winding drum opposite to the rotating disk arrangement;
A cylindrical member that is coaxial with the rotating shaft and rotates integrally with the rotating disk so as to cover the winding drum, and has a spiral groove that is formed on the inner peripheral surface to be engaged with the outer peripheral portion of the slide disk. Equipped,
The slide disk moves in the axial direction by rotation of a cylindrical member that rotates integrally with a rotating disk that rotates by drawing and winding the cord,
A cord storage device that stores or pulls out the cord in the step portion while the winding drum expands and contracts in accordance with a moving amount of the slide disk.  The cord storage device according to claim 1, wherein the number of turns wound around each of the stairs is set according to the pitch of the spiral groove of the cylindrical member. The cord storage device according to claim 1, wherein a step of the staircase is higher than a diameter of the power cord.

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