JPS5924702B2 - electric cord reel - Google Patents

Description

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

Some conventional electric cord reels wind up the electric cord by operating a lock release button, but the present invention does not require a lock release button, and when storing the electric cord that has been pulled out, the cord can be rolled up just a little. An object of the present invention is to provide an electric cord reel that can smoothly and automatically wind up an electric cord just by operating it.

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 a circumferential outer circumferential wall 1a erected at its outer end. Ib is a shaft protruding inward from the center of the case 1 of the main body, and Ic is a helical spring 3 that is erected around the axis Ib at approximately the center of the main case 1. It is an annular inner peripheral wall. 2 is the axis Ib
The electric cord 4 is a rotary cylinder rotatably supported by a shaft, and a winding cylinder 2b for the 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 Ic 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. electrical cord 4
The distal end portion 4a of the winding drum 2b is tightly fitted into an annular groove 12 provided inside the winding drum 2b. Further, the tip end 4b of the electric cord 4 is inserted into the drawer part 5 (second
As the electric cord is pulled out, the rotating body 2 rotates in the direction of arrow A in Figure 2, compressing the helical spring 3, and repulsing the helical spring 3. Elastic energy is accumulated, and conversely, when the pulling force of the electric cord 4 is released, the accumulated repulsive elastic energy of the helical spring 3 acts, causing the rotating body 2 to rotate in the direction of arrow B in FIG. , so that the electric cord 4 is naturally wound around the winding drum 2b. FIG. 3 shows a planar cross section of the electric cord reel according to the present invention, and 6 is a circular base 2 of the rotating body 2.
This is a locking lever rotatably supported by a shaft support 2c protruding toward the outer periphery of d. Reference numeral 6a denotes a locking protrusion formed on the inner tip of the locking lever 6, which is biased in the direction of arrow C by the action of a compression spring 8 attached to a bracket 7 fixed to the rotating body 2. There is.

Reference numeral 9 denotes a deformed rectangular cam plate, which has four corners 9a around its periphery, and between each corner 9a there is a curved curvature along the curvature of the outer circumferential surface 1e of the annular inner circumferential wall 1c. I did 2
It has two long sides 9 and two short sides 9c.

The cam plate 9 is rotatably supported at its center by a shaft 10 that projects at an intermediate position between the shaft support 2c of the locking lever 6 and the locking protrusion 6a. Therefore, each distance from the shaft 10 to both the long sides 9b is shorter than each distance from the shaft 10 to both the short sides 9c. That is, both long sides 9b are close to the shaft 10, and both short sides 9c are remote from the shaft 10. The function of the cam plate 9 is to lock the locking protrusion 6a of the locking lever 6.
The purpose is to press the inner circumferential wall 1c against the outer circumferential surface 1e of the inner circumferential wall 1c or to separate it from the outer circumferential surface 1e. Figure 6 shows
The long side 9b of the cam plate 9 faces the outer circumferential surface 1e of the annular inner circumferential wall 1c, the distance between the locking lever 6 and the annular inner circumferential wall 1c is close, and the locking protrusion 6a presses the outer circumferential surface 1e. It shows a prone position. Further, in FIG. 7, the short side 9c of the cam plate 9 comes into contact with the outer circumferential surface 1e of the annular inner circumferential wall 1c, and the distance between the locking lever 6 and the annular inner circumferential wall 1c (5) becomes remote, and the locking protrusion 6a is placed on the outer circumference. This figure shows the state in which the cam plate 9 and the shaft 10 of the locking lever 6 are fitted together as follows.
As shown in FIG. 6, the locking protrusion 6a of the locking lever 6 presses the outer peripheral surface 1e of the inner circumferential wall 1c, and the long side 9 of the cam plate 9
When b and the outer circumferential surface 1e are in a non-contact state, the cam plate 9 does not rotate naturally even if centrifugal force and shock generated with the rotation of the rotary cylinder 2 are applied, and as shown in FIG. Thus, when a rotational force is applied to the cam plate 9 while the corner portion 9a of the cam plate 9 is supported by the support portion 11a of the notch step portion 11 (described later), the cam plate 9 rotates on its axis only at this time. being done. 1d is one or more locking recesses in an appropriate number formed on the outer peripheral surface 1e of the annular inner peripheral wall 1c.

When pressing the outer peripheral surface 1e of the annular inner peripheral wall 1c, the locking protrusion 6a and the locking recess 1d of the locking lever 6 rotate the rotating barrel 2 in the direction of arrow A (the direction in which the electric cord 4 is pulled out). In such a case, even if the locking protrusion 6a is once fitted into the locking recess 1d, it is pushed outward from the locking recess 1d by the subsequent rotational force, or in the direction of arrow B (the electric cord When rotating in the direction in which the rotating body 2 is rolled up, the locking protrusion 6a engages with the locking recess 1d to stop rotation of the rotary drum 2 in the same direction. Reference numeral 11 denotes a notch step, which is inserted into the inward long side 9b of the cam plate 9 only during the process of engagement between the locking protrusion 6a and the locking recess 1d as shown in FIG.
The same number of locking recesses as the locking recesses 1d are provided at appropriate positions on the outer peripheral surface 1e while maintaining a position adjacent to the locking recesses 1d so that the locking recesses 1d are moved closer to the center of the rotating body 2 than the outer peripheral surface 1e of the annular inner peripheral wall 1c. There is.

Reference numeral 11a denotes a support portion of the corner portion 9a of the cam plate 9 provided at the end of the notch step portion 11 in the direction of arrow A, and reference numeral 11b represents the support portion 11b extending from the support portion 11a to the outer peripheral surface 1e of the annular inner peripheral wall 1c. Reference numerals 131 and 132 shown in FIG. 1, which are the bottom surfaces of the notched stepped portion 11 having a continuous inclined surface in the direction of symbol B, are coaxial annular band electrodes that cover the entire opening of the main body case 1. It is mounted on a disk-shaped insulating plate 15 provided to electrically insulate the central part of the lid body 14, which is attached with bolts or the like.

Terminals 161 and 162 of the electrodes 131 and 132 are provided through the insulating plate 15, and the terminals of the internal wiring cord 17 are connected to the terminals.

Reference numerals 181 and 182 denote sliding brushes, and the contact points of the brushes (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 electrode 131 or 132, respectively.

Further, as shown in FIG. 2, the end portion of an electric cord 4 that has passed through notches 12a and 12b formed in the inner wall of the annular groove 12 is connected to the brush. The electric cord reel of the present invention constructed as described above is used in the following manner.

First, when pulling out the electric cord 4 as shown in FIG.
tries to rotate in the direction of arrow A. Due to this rotational force,
The cam plate 9 of the locking lever 6 in position 4 is rotated in the direction of arrow E while the corner 9a of the cam plate is brought into contact with and supported by the support portion 11a of the stepped portion 11, and the locking protrusion 6a is pushed from the locking recess 1d of the annular inner circumferential wall 1c, so the locking lever 6 moves from the position 4 to the position ◎ as shown. When the electric cord 4 is continued to be pulled, the cam plate 9 maintains a stable posture such that its inward short side 9c is along the outer circumferential surface 1e of the annular inner circumferential wall 1c, and moves on the outer circumferential surface 1e. Slide in the direction of arrow A, pass the ◎ position, and move to the @ position.
When reaching the @ position, the corner 9a of the inward short side 9c
is supported by the support portion 11a of the notch step portion 11 after the collision,
The cam plate 9 rotates in the direction of arrow F. In order to reduce the impact instantaneously applied to the shaft of the cam plate 9 due to the collision with the support part 11a, the corner part 9a on the side that collides with the support part 11a is not provided with a sharp corner, for example. It is desirable to design the shape with a round shape as shown in the figure. When the electric cord 4 is further pulled out, the cam plate 9 assumes a stable position with its inward long side 9b along the outer peripheral surface 1e as shown in FIG. 6, so that the lock lever 6 is locked. Protrusion 6
A contacts the outer circumferential surface 1e of the annular inner circumferential wall 1c, slides in the direction of the arrow A while pressing it, passes the position 4, and reaches the position (to) immediately before the locking recess 1d. Move to. this(
In the position (f), the tip corner 9a of the inward long side 9b of the cam plate 9 has already passed the support 11a of the notch step 11, so continue to pull out the electric cord 4 and lock it once. Even if the locking protrusion 6a of the lever 6 fits into the locking recess 1d, the cam plate 9 does not fit into the cut step 11 and passes through the position (G), and the locking protrusion 6a itself is not locked. Since it is designed to come out of the recess 1d, it moves directly to the \1 position and continues to move in the same manner thereafter. In this way, the rotary drum 2 rotates smoothly in the direction of the arrow A without being hindered, and the electric cord 4 is smoothly drawn out. After pulling out the electrical cord 4 for the required length,
When the pulling force applied to the cord is released, the rotating body 2 moves as shown by the arrow B in FIG.
direction, the locking protrusion 6a of the locking lever 6 fits into the locking recess 1d (see position 3 in FIG. 6), and the cam plate 9 also fits into the bottom surface of the notch step 11 as shown in FIG. 11b, the rotary barrel 2 has a locking protrusion 6a and a locking recess 1d.
Since the electric cord 4 is prevented from rotating in the direction of the arrow B by the engagement with the reel, the electric cord 4 is not wound up and the required length of electric cord is maintained outside the reel. 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 and then to the ◎ position as described above. , the inward short side 9c of the cam plate 9 is brought into contact with the outer peripheral surface 1e of the annular inner peripheral wall 1c.

When the user releases his 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 repulsion elastic force accumulated in the helical spring 3. Along with this rotation, the cam plate 9 slides in the direction of arrow B in a stable posture with its inward short side 9c aligned with the outer peripheral surface 1e of the annular inner peripheral wall 1c,
Eventually, the locking protrusion 6a falls to the bottom surface 11b of the cut step 11, but as shown in FIG. Since the engagement is prevented, each position 9, 2, and 4 is moved in the direction of arrow B without any locking action, and this movement is continued thereafter. In this way, rotating body 2
rotates smoothly in the direction of arrow B without any hindrance, and winds up all the electric cord pulled out of the reel. As described in detail above, in the electric cord reel according to the present invention, a locking recess and a notch step are provided in the annular inner circumferential wall of the main body case, and the locking recess corresponds to the rotary drum housed in the main body case. A locking lever is provided, and a deformed rectangular cam plate having a long side and a short side corresponding to the notch step is rotatably supported on the locking lever,
The engagement relationship between the locking recess and the locking lever is controlled by whether either the long side or the short side of the cam plate faces the annular inner peripheral wall as the cam plate rotates. By simply manipulating the electric cord wound around the body, the electric cord can be pulled out and automatically wound up very smoothly.

Moreover, the electric cord reel according to the present invention has a simplified structure due to the omission of the lock release mechanism required for conventional electric cords, which improves manufacturing efficiency and reduces manufacturing costs. Since the structure is such that no excessive external force is applied to the lock lever, the failure rate is significantly reduced, etc.
It has many excellent advantages.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing an embodiment of an electric cord reel according to the present invention, and FIG. 2 is a bottom sectional view taken along the - line of the same.
FIG. 3 is a plan view cut along the - line in FIG. 1, FIG. 4 is a perspective view showing the state of the locking lever when engaged, and FIGS. 5 to 7 show the operation of the locking lever and the cam plate. FIG. 1... Main body case, 1a... Annular outer circumferential wall, 1c... Annular inner circumferential wall, 1d... Locking recess, 1e... Outer circumferential surface, 2...Rotating body, 2a...Shaft bearing part, 2d...Circular base, 3...Helical spring, 4...・Electric cord, 6...Latching lever, 6a...Latching protrusion, 9...Cam plate, 9a...Corner, 9b... ...Long side part, 9c...Short side part,
10... shaft, 11... cut step,
131, 132... Strip electrode, 181, 18
2...Sliding brush.

Claims (1)

[Claims] 1. In an electric cord reel in which a rotary body that is housed in a main body case and rotatably supported by a shaft winds up an electric cord using a tendril spring, a locking lever is engaged with a circular base of the rotary body. The distal end portion with a protrusion is rotatably supported so as to urge the inward portion of the circular base surface, and the shaft protrudingly provided at an intermediate position between the pivot support and the distal end portion of the locking lever has four circumferences. A deformed rectangular cam plate having four corners, two long sides and two short sides with concave curves between each corner is rotatably supported at its center. An annular inner circumferential wall concentric with the rotating body is erected near the center of the inner surface of the main body case, and the locking protrusion of the locking lever engages with the outer circumferential surface of the annular inner circumferential wall to prevent the rotation. A locking recess that can prevent winding rotation of the barrel and a notch step that allows the corner of the cam plate to engage and rotate when the cord is pulled out and rotates correspond to the locking protrusion and corner that are to be engaged, respectively. The locking protrusion of the locking lever presses the outer peripheral surface of the annular inner peripheral wall when the long side of the cam plate faces the outer peripheral surface of the annular inner peripheral wall. , when the short side of the cam plate is in contact with the outer circumferential surface of the annular inner circumferential wall, it separates from the outer circumferential surface, and the locking protrusion of the locking lever is engaged with the outer circumferential surface of the annular inner circumferential wall. When pressing a portion other than the locking recess and the notch step, the inward long side of the cam plate separates from the outer peripheral surface of the annular inner peripheral wall, and the locking protrusion presses the position closest to the locking recess. An electric cord reel characterized in that when the cam plate is in the state, the tip end corner of the cam plate passes through the support part of the notch step part.