JPH0439242Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a cord winding device for various electrical appliances such as electric cookers, vacuum cleaners, and irons.

(Prior Art) Conventionally, this type of cord winding device rotatably supports a reel body around which an electric cord is wound around a shaft provided upright in a main body case, and the reel body is attached in one direction. The inner end of the spiral spring is fixed to the shaft and the outer end is fixed to the reel body. Elastic energy is accumulated in the spiral spring by the rotation of the reel body when pulling out the electric cord, and this elastic energy acts on the reel. It is configured to rewind the electrical cord by rotating the main body in the opposite direction. Since the reel body rotates in this way, the electrical connection between the terminal fixed to the main body case and electrically connected to the power supply terminal of an electric appliance and the inner end of this electric cord is difficult, for example. As disclosed in Japanese Patent No. 21452, this is done through a sliding contact such as a contact spring that slides into contact with a current collector plate serving as a terminal.

(Problem to be solved by the invention) Such a sliding contact is directly connected to the core wire at the inner end of the electric cord, but because it rotates with the rotation of the reel body, it is connected to the current collector plate. are only in sliding contact. Therefore, as the sliding contacts rotate, their mutual contact surfaces are worn out, resulting in unstable contact and poor safety and reliability. It is also possible to use less abrasive materials for the sliding contacts and current collector plates, but such materials are expensive and will still wear out over long periods of use with similar results.

Therefore, the present invention was developed based on the above-mentioned problems, and the purpose is to provide a cord winding device that securely connects a terminal and an electric cord and is highly safe and reliable. .

[Structure of the invention] (Means for solving the problem) The present invention provides one end 1 of a spiral spring 19 consisting of insulated conductors 13 and 16 that biases the reel body 8.
Connect terminal 7 to terminals 4 and 17, and connect terminal 7 to terminals 15 and 1 on the other end.
8 to which an electric cord 20 is connected.

(Function) The current input to the electrical cord 20 flows through the electrical cord 20 -> the conductors 13, 16 -> the terminal 7, and passes through the electrical conductors 13, 16 forming the spiral spring 19.
Terminals 7 and electrical cords 20 are connected to both ends of each.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a main body consisting of a tray-shaped lower frame 2 with an annular outer circumferential wall 2A erected at the outer end, and a donut-shaped upper plate 3 that covers the upper opening of the lower frame 2. The upper plate 3 is fixed to the lower frame 2 with screws 4. A terminal plate 6 having a stepped shaft portion 5 projecting into the main body case 1 at the center is fitted and attached to the central opening of the upper plate 3. A pair of terminals 7 whose upper ends are exposed are embedded in the terminal plate 6 for connection to power terminals of electric appliances (not shown).

Reference numeral 8 denotes a reel body rotatably supported on the shaft portion 5, and includes a donut-shaped disc 9 that divides the interior of the main body case 1 into upper and lower parts, and a reel body on which a circle concentric with the shaft portion 5 is disposed on the disc 9. An annular partition wall 10 that stands upright in a shape, an upper disk 11 that extends outward from the top of the partition wall 10 substantially parallel to the disk 9, and an annular rib that stands up on the lower surface of the disk 9. It consists of 12. Then, the reel main body 8 connects the inner peripheral part of the disc 9 to the shaft part 5, and the partition wall 1
The upper end of 0 is supported on the terminal plate 6, the lower end of the rib 12 is supported on the lower frame 2 of the main body case 1, and the outer circumference of the upper disk 11 is supported on the upper plate 3. Rotate.

13 is a main spiral spring installed in a spiral shape between the shaft portion 5 and the partition wall 10 on the upper surface of the disk 9, and its inner end 14 is embedded in the terminal plate 6 and fixed to the lower end of one terminal 7. It is fixed by caulking or spot welding, the outer end 15 is latched into the notch groove 10A of the partition wall 10, and rotational force is applied to the reel body 8, for example in a clockwise direction, so that it rotates together with the reel body 8. It is installed like this. Reference numeral 16 denotes a sub-spiral spring installed in a spiral shape between the shaft portion 5 and the rib 12 on the lower surface of the disc 9, and its inner end 17 is attached to the lower end of the other terminal 7 which is embedded and fixed in the terminal plate 6. Fix by caulking or spot welding, etc., and insert the outer end 18 into the notch groove 12A of the rib 12.
The reel body 8 is attached so as to be latched onto the reel body 8 and rotated together with the reel body 8 by applying rotational force to the reel body 8 in a clockwise direction. These main spiral springs 13 and auxiliary spiral springs 16 are conductors made of conductive material such as spring steel or phosphor bronze, and the spiral springs 19 are insulated from each other by a disk 9.
is configured.

20 is a partition wall 1 between the disk 9 and the upper disk 11;
This is an electrical cord that is wound in alignment around the outer peripheral surface of the main spiral spring 13. A plug 21 connected to a power source is attached to the outer end of the electrical cord, and a pair of core wires 22 and 23 at the inner end are connected to the outer end 15 of the main spiral spring 13. and is electrically connected to the outer end 18 of the sub-spiral spring 16 by soldering or the like. The plug 21 side of the electric cord 20 is pulled out from the outlet 24 provided in the main body case 1, and as the electric cord 20 is pulled out, the reel body 8 is pulled out in one direction by the spiral spring 1.
9 is compressed, elastic energy is accumulated in this spiral spring 19, and conversely, when the pulling force of the electric cord 20 is released, the accumulated elastic energy of the spiral spring 19 acts and the reel body 8 is moved in the opposite direction. It is configured to rotate and naturally wind up the electrical cord 20. The electric cord 20 pulled out is stopped at a predetermined position by a locking device (not shown), and when the electric cord 20 is pulled out a little again, this stop is released and the electric cord 20 is wound up by the spiral spring 19. . Moreover, the main body case 1,
The terminal plate 6, the reel body 8, etc. are formed of an insulating material, and the main spiral spring 13 and the sub-spiral spring 16
are electrically insulated.

In the present invention constructed as described above, when the electric cord 20 is appropriately pulled during use, the reel main body 8 rotates and is pulled out to a desired length, and elastic energy is accumulated in the spiral spring 19 accordingly.
On the other hand, when winding the electric cord 20, if the locking of the reel body 8 by the locking device (not shown) is released, the reel body 8 rotates in the opposite direction due to the elastic energy of the spiral spring 19, and the electric cord 20 is wound. taken. And, the present invention is based on such an electric cord 20
a spiral spring 1 that urges the reel body 8 to wind up the
A terminal 7 and an electric cord 20 are electrically connected to both ends of the terminal 9. That is, main spiral spring 1
The inner end 14 of 3 and the inner end 17 of the auxiliary spiral spring 16 are fixed to the shaft 5 and connected to the pair of terminals 7 directly by caulking or the like, while the outer ends 15 and 18 of the reel body 8 The reel body 8 is locked to the reel body 8 so as to rotate together with the reel body 8, and is connected to the core wires 22 and 23 of the electric cord 20, respectively, by direct soldering or the like. Therefore, the current input from the plug 21 flows from the electrical cord 20 to the spiral spring 1.
It is supplied to the electrical appliance as a load through the path 3, 16→terminal 7. For this reason, the spiral spring 13, which has the function of winding up the electric cord 20,
By using 16 as a conductor and eliminating the conventional sliding contact, the paths through which current flows are reliably connected, and there is almost no risk of conduction failure even during long-term use, improving safety and reliability. Further, since the spiral spring 19 is used as it is without using an expensive sliding contact, manufacturing costs can be reduced. Furthermore, by using the main spiral spring 13 and the auxiliary spiral spring 16, for example, even if one gets caught somewhere inside the main body case 1 and becomes difficult to move, the reel main body 8 can be rotated by the biasing force of the other. And along with that, the catch will be released,
A smooth winding operation is always performed.

Although one embodiment of the present invention has been described in detail above, it can be modified as appropriate within the scope of the gist of the present invention. For example, in the above embodiment, a two-core electrical cord was described in detail, but if a three-core electrical cord is used, three spiral springs are required. Further, as shown in FIG. 3, if a plurality of conductors are integrated via an insulator, a single spiral spring can be formed. That is, the third
The figure shows a vertical cross section of a spiral spring, and the figure A shows a spiral spring 29 formed by clamping conductors 27 and 28 to the upper and lower parts of an insulator 26 with an H-shaped cross section, respectively.
Figure B shows a spiral spring 33 provided with an insulator 32 with one conductor 30 on one side and another conductor 31 on the other side, and Figure C shows upper and lower conductors 34, 35.
A spiral spring 37 with an insulator 36 interposed therebetween is shown, and FIG. Furthermore, in the above embodiment, the terminal plate 6 of the upper plate 3 is provided with the shaft portion 5; however,
The shaft portion 5 may be erected on the lower frame 2.

[Effects of the invention] As detailed above, according to the invention, the terminal and the electrical cord are electrically connected using the spiral spring that biases the reel body, thereby achieving highly safe and reliable cord winding. A collection device can be provided.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing one embodiment of the present invention, Fig. 2 is a partially cutaway front view, and Fig. 3 is A, B, C, D.
FIG. 7 is a partially enlarged perspective view of a spiral spring showing another embodiment. 1... Main body case, 7... Terminal, 8...
Reel body, 13... Main spiral spring (conductor), 1
4...Inner end (one end), 15...Outer end (other end), 16
... Sub-spiral spring (conductor), 17 ... Inner end (one end), 18 ... Outer end (other end), 19 ... Spiral spring,
20...Electric cord.

Claims (1)

[Scope of utility model registration request] In a cord winding device, a cord winding device is provided with a rotatable reel body for winding an electrical cord connected to the terminal in a body case having a terminal, and a spiral spring biasing the reel body in one direction. A cord winding device characterized in that one end of the spiral spring made of a conductor is connected to the terminal, and the other end is connected to the electric cord.