JPS6118508B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric cord reel for toasters, electric pots, mixers, etc.

Some conventional electric cord reels wind the electric cord by operating a lock release button, but the present invention provides an electric cord reel that can automatically wind the electric cord without the need for a lock release button. The purpose is to submit the following.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be specifically described below based on embodiments shown in the drawings. FIG. 1 shows a front cross-section of an electric cord reel according to the present invention, and 1 is a tray-shaped main body case with an annular outer circumferential wall 1a erected at its outer end. 1b is a shaft protruding inward from the center of the main body case 1; 1c is a helical spring 3 erected around the shaft 1b at approximately the center of the main case 1;
It is an annular inner circumferential wall that encloses the Reference numeral 2 denotes a rotary drum rotatably supported on the shaft 1b, and a winding drum 2b for an electric cord 4 is provided approximately at the center thereof. The proximal end 3a (see FIG. 3) of the helical spring 3 is fixed to the inner surface of the annular inner circumferential wall 1c to hold it in a fixed position, and the terminal end 3b is fixed to the shaft support 2a of the rotating body, It is attached to rotate together with the rotating body 2. End portion 4 of electrical cord 4
a is an annular groove 21 provided inside the winding drum 2b;
It is inserted and fixed in a tight fit state. Also electric cord 4
The distal end portion 4b of the main body case 1 is adapted to be pulled out from a drawer portion 5 (see FIG. 2) provided in the main body case 1. As the electric cord is pulled out, the rotating body 2 rotates in the direction of arrow A in FIG. When the pulling force is released, the accumulated repulsive elastic energy of the helical spring 3 acts, and the rotating body 2 moves as shown by the arrow B in Figure 2.
direction), and the electric cord 4 is attached to the winding drum 2b.
It is structured so that it naturally involves. FIG. 3 shows a planar cross section of an electric cord reel according to the present invention,
Reference numeral 6 denotes a locking lever rotatably supported on a shaft support 2c protruding from the outer periphery of a circular base 2d (see Fig. 1) of the rotating body 2, and a compression lever 6 attached to a bracket 7 fixed to the rotating body. The action of the spring 8 biases the tip 6a of the locking lever in the direction of arrow C. As shown in FIG. 4, a locking piece 9 is provided on the step 6b provided at the tip 6a of the locking lever 6.
is rotatably supported by a shaft 6c protruding from the stepped portion, and the locking piece 9 is biased in the direction of arrow E by the action of a torsion spring 10. 6d
is a stopper wall of the locking piece 9 rising from the stepped portion 6b. Approximately at the center of the locking lever 6, a rod 11 for moving the locking lever 6 in the direction of arrow D is rotatably supported on a shaft 6e protruding from the locking lever 6. , furthermore, the rod 11 is a torsion spring 1
2, it is biased in the direction of arrow F. 6f is a stopper of the rod 11 which is provided to protrude from the locking lever 6. The length of the rod 11 is:
As shown in FIG. 6C, the rod 11 and the locking lever 6
are dimensioned so that the tip end 9a of the locking piece 9 does not press against the outer circumferential surface 1e of the annular inner circumferential wall 1c when the locking pieces 9 are substantially perpendicular to each other. The relationship between the repulsive elastic forces of the compression spring 8, torsion spring 10, and torsion spring 12 is as shown in FIG. The biasing force exerted by the compression spring 8 in the direction of arrow C' on the locking lever 6 is made larger than the reaction force of the torsion spring 10 and torsion spring 12 which is received in the direction of arrow D' through the locking lever 6. be. In FIG. 3, reference numeral 1d indicates one or more locking recesses formed on the outer circumferential surface 1e of the annular inner circumferential wall 1c. The locking recess 1d and the locking piece 9 are the locking pieces that are fitted into the locking recess 1d when the rotating body 2 rotates in the direction of arrow A (the direction in which the electrical cord 4 is pulled out). 9 moves out of the locking recess 1d while rotating in the direction of arrow G due to the rotational force of the rotary drum 2 and the biasing force of the locking lever 6 in the direction of arrow C', as shown in FIG. When being pushed out or rotating in the direction of arrow B (the direction in which the electrical cord is wound), the locking piece 9 engages with the locking recess 1d as shown in FIG. 2 is configured to stop rotation in the same direction. 13 is the outer peripheral surface 1e
As shown in FIG. 5B, with the notch step portions provided on the top in the same number as the locking recesses 1d, when the rod 11 moves in the direction of the arrow A while pointing the tip 11a in the same direction. However, a support portion 13a for supporting the tip portion 11a of the rod 11 is provided. Reference numeral 14 denotes a notch step portion provided in the same number as the locking recesses 1d on the outer circumferential surface 1e between the notch step portion 13 and the engaging recess portion 1d, and as shown in FIG.
The tip 11 of the rod 11 moves in the direction of the arrow B while pointing the tip 11a in the same direction.
A support portion 14a is provided for supporting a. Reference numerals 151 and 152 shown in FIG. 1 are coaxial annular band-shaped electrodes, which are provided to electrically insulate the central part of the lid 16 attached with bolts or the like so as to cover the entire opening of the main body case 1. disc-shaped insulating plate 17
installed on top. 181 and 182 are terminals of the electrodes 151 and 152, and are connected to the insulating plate 1.
7, and the terminal of the internal wiring cord 19 is connected to the terminal. 201 and 2
Reference numeral 02 denotes a sliding brush, and the contact points of the brush (see FIG. 2) are connected to the rotating body 2 by bolts or the like so as to slide on the surface of the strip-shaped electrode 151 or 152, respectively. The brush also has notches 21a and 2 formed in the inner wall of the annular groove 21, as shown in FIG.
The terminal portion of the electric cord 4 that has passed through 1b is connected.

The electric cord reel according to the present invention constructed as described above is used as follows. First, when the electric cord 4 is pulled out as shown in FIG. 5, the tip end 4b of the cord is held and pulled, so the rotating body 2 tends to rotate in the direction of arrow A. The locking piece 9 of the locking lever 6 at the position A shown by the two-dot chain line is moved into the locking recess 1d by the rotational force of the rotating barrel 2 and the biasing force of the locking lever 6 in the direction of arrow C'. The locking piece 9 is rotated in the direction of arrow G while being supported in contact with the ring, and the tip 9a of the locking piece 9 moves away from the outer circumferential surface 1e of the annular inner circumferential wall 1c, and conversely, the tip 6a of the locking lever 6 moves away from the outer circumferential surface 1e. It approaches surface 1e. When the electric cord 4 is continued to be pulled, the outer circumferential surface 9b of the locking piece 9 near the pivot portion slides into contact with the outer circumferential surface 1e of the annular inner circumferential wall 1c, passing through the position B and reaching the position C in FIG. 6. Move up to. When the position C is reached, the tip 11 of the rod 11
a is supported by the support portion 13a of the notch step portion 13 after the collision, the rod 11 rotates in the direction of the arrow H, and at the same time, the tip 6a of the locking lever 6 also rotates in the direction of the arrow L. Locking piece 9 that has lost the reaction force from the outer peripheral surface 1e
is automatically rotated in the direction of arrow J by the reverse rotational force of the torsion spring 10. When the electric cord 4 is subsequently pulled out, the rod 11 is stopped from rotating in the direction of arrow H by the stopper 6f, passes through position D and moves to position E, and thereafter continues in the direction of arrow A. Continue moving. Therefore, the rotary drum 2 rotates smoothly in the direction of arrow A without being hindered, and the electric cord 4 is smoothly drawn out. After pulling out the electrical cord 4 by the required length, when the pulling force applied to the electrical cord 4 is released, the rotating body 2 rotates in the direction of arrow B in FIG. 6 due to the reverse rotational force of the helical spring 3. Therefore, the tip portion 11a of the rod 11 reaches the support portion 14a of the notch step portion 14 shown in the position shown in FIG. As a result, the rod 11 rotates in the direction of the arrow K and reaches the position G, and the tip end 9a of the locking piece 9 comes into contact with the outer circumferential surface 1e of the annular inner circumferential wall 1c. The tip portion 9a of the locking piece 9 that is in contact with the outer circumferential surface 1e continues to slide in the direction of arrow B while pressing the outer circumferential surface 1e due to the repulsive force of the compression spring 8, and fits into the locking recess 1d (the second 7), the rotating barrel 2 is prevented from rotating in the direction of arrow B by the engagement between the locking piece 9 and the locking recess 1d, so the electric cord 4 is not wound up. , the state in which the required length of the electrical cord is pulled out of the reel is maintained.

Next, when winding up the electric cord 4, as shown in FIG. 5, first pull out the electric cord 4 a little and move the locking lever 6 from the engagement position to the position A and then to the position B as described above. Then, the outer circumferential surface 9b of the locking piece 9 is brought into contact with the outer circumferential surface 1e of the annular inner circumferential wall 1c. When you let go of your hand in this state, the rotating body 2 that winds up the electric cord 4 starts rotating in the direction of arrow B due to the repulsive elastic force accumulated in the helical spring 3.
The locking lever 6 continues to rotate while maintaining the state shown in B without being prevented from moving in any way.
In this way, the rotary drum 2 rotates smoothly in the direction of the arrow B without any hindrance, and winds up all the electric cord pulled out from the reel.

As described in detail above, according to the present invention, the electric cord can be easily pulled out and automatically wound by simply adjusting the force for pulling the electric cord out of the reel. The required lock release mechanism of the lock lever can be omitted. Therefore, the electric cord reel of the present invention has a simpler structure than conventional products, and there is no risk of applying excessive external force to the locking lever, so the failure rate can be significantly reduced. It has excellent advantages.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing one embodiment of an electric cord reel according to the present invention, FIG. 2 is a bottom sectional view taken along the - line of the same as above, FIG. The figure is a perspective view showing the state of the locking lever when engaged, and FIGS. 5 to 7 are plan views showing the operations of the locking lever, the locking piece, and the rod. 1... Main body case, 1c... Annular inner peripheral wall, 1d
...Latching recess, 1e...Outer peripheral surface, 2...Rotating body,
2a... Bearing part, 2d... Circular base, 3... Helical spring, 4... Electrical cord, 6... Locking lever,
9... Locking piece, 11... Rod, 10... Torsion spring,
13, 14... Cut step, 151, 152...
Strip electrode, 201, 202...Sliding brush.

Claims (1)

[Scope of Claims] 1. A main body case that does not rotate, a rotating body that rotates in one direction by the repulsive force of a helical spring to wrap an electrical cord, and both the rotating body and the wiring inside the device. In an electric cord having a current collection mechanism provided in between, the electric cord is pivotally supported on the circular base of the rotating body, and at the same time,
By appropriate means such as a locking lever that is biased toward the center of rotation of the rotating body, and a resilient force of a spring in the same rotational direction as the direction in which the electric cord is wound around the rotating body,
The locking is performed by applying a rotational force so that the reaction force acting on the shaft support in the direction of the outer periphery of the rotary shell is smaller than the biasing force of the locking lever on the shaft support acting in the direction of the rotation center of the rotary drum. A locking piece is rotatably supported at an appropriate position of the lever, and a locking piece is arranged so that the locking lever is moved away from the center of rotation of the rotating body as the locking piece approaches a state parallel to the biasing direction of the locking lever. A rod rotatably supported at an appropriate position, and an annular inner circumferential wall whose outer circumferential surface is pressed by the locking piece or the rod, and a rotatable rod is provided at an appropriate location on the outer circumferential surface of the annular inner circumferential wall. When the body rotates in the direction of pulling out the electrical cord, it does not engage with the locking piece, and when the rotating body rotates in the direction of winding the electric cord, the tip of the locking piece moves toward the center of rotation of the rotating body. At least one set of a locking recess shaped to engage with the locking piece and a cut step that prevents the tip of the rod from moving when the rotating body rotates in the direction of pulling out the electric cord. An electric cord reel characterized by: