JPS5924703B2 - electric cord reel - 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 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 once pulled out, the cord can be rolled up slightly. 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 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 shaft that is provided in the center of the main body case 1;
It is an annular inner circumferential wall that encloses a helical spring 3, which is erected approximately at the center of the shaft 1b and around the shaft 1b.

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. 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
(see figure) to the outside. 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) 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 reference numeral 6 designates a locking lever rotatably supported on a shaft support 2c protruding from the outer periphery of the circular base 2d of the rotating body 2. . Reference numeral 6a denotes a locking protrusion formed on the outer 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. ing.

Reference numeral 9 denotes a cam plate having a deformed rectangular shape, and four corner portions 9a, two long side portions 9b, and two short side portions 9c are alternately formed around the periphery.

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 the short side 9c is remote from the shaft 10. The function of the cam plate 9 is to place the locking protrusion 6a of the locking lever 6 in a pressed state against the inner peripheral surface 1e of the annular outer peripheral wall 1a, or in a state in which it is released from the inner peripheral surface 1e. In FIG. 6, the long side 9b of the cam plate 9 is connected to the annular outer peripheral wall 1.
The locking lever 6 and the annular outer peripheral wall 1 face the inner peripheral surface 1e of the
A is shown in a state in which the locking protrusion 6a is close to the inner peripheral surface 1e, and the locking protrusion 6a is pressing against the inner circumferential surface 1e. Further, in FIG. 7, the short side 9c of the cam plate 9 faces the inner circumferential surface 1e of the annular outer circumferential wall 1a, and the distance between the locking lever 6 and the annular outer circumferential wall 1a is remote, and the locking protrusion 6a is A state in which it is released from the inner circumferential surface 1e is shown. Reference numeral 1d designates one or more locking recesses formed on the inner circumferential surface 1e of the annular outer circumferential wall 1a.

The locking protrusion 6a and the locking recess 1d of the locking lever 6 when pressing the inner circumferential surface 1e of the annular outer peripheral wall 1a rotate the rotating barrel 2 in the direction of arrow A (the direction in which the electric cord 4 is pulled out). In this case, even if the locking protrusion 6a is once fitted into the locking recess 1d, the locking protrusion 6a is pushed out of the locking recess 1d by the subsequent rotational force. When rotating in the winding direction), 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 allows the outer long side 9b of the cam plate 9 to be inserted into the inner peripheral surface of the annular outer peripheral wall 1a 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 1d are provided at appropriate positions on the inner circumferential surface 1e while maintaining a side-by-side relationship so as to move the outer circumferential edge 2e of the rotating body 2 further outward than the locking recesses 1e.

11a is a support part of the corner part 9a or 9a' of the cam plate 9 provided at the end of the notch step part 11 in the direction of arrow A;
Reference numeral 11b denotes the bottom surface of the cut step 11, which has a continuous inclined surface in the direction of arrow B from the support portion 11a to the inner circumferential surface 1e of the annular outer circumferential wall 1a.

Reference numerals 131 and 132 shown in FIG. 1 are coaxial annular band-shaped electrodes, which are provided to electrically insulate the central part of the lid 14 attached with bolts or the like so as to cover the entire opening of the main body case 1. It is mounted on a disc-shaped insulating plate 15. 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 contacts of the brushes (see FIG. 2) are joined 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. FIG. 8 shows a planar cross-section of a second electric cord reel according to the present invention, and the structure is the same as that of the electric cord reel described above except for the cam plate 91 and the notched stepped portion 11' (see FIG. 8). It is the composition.

Reference numeral 91 is a cam plate having a deformed elliptical shape, and has corner portions 91a and 91a' at both ends in the major diameter direction, and two cam plates are provided on both sides from the corner portion 91a at one end to the corner portion 91a' at the other end. It has curved outer peripheral surfaces 91b and 91c.

The cam plate 91 having a deformed elliptical shape has a portion near the outer circumferential surface 91b on its short axis direction as a shaft protruding at an intermediate position between the shaft support 2c of the locking lever 6 and the locking protrusion 6a. 1
It is rotatably eccentrically supported at 0. Therefore, the shortest distance from the shaft 10 to the outer circumferential surface 91b on one side of the cam plate 91 is shorter than the shortest distance from the shaft 10 to the outer circumferential surface 91c on the other side. Therefore, when the outer circumferential surface 91b on one side faces the inner circumferential surface 1e of the annular outer circumferential wall 1a, the locking lever 6 is close to the inner circumferential surface 1e, and the outer circumferential surface 91c on the other side faces the inner circumferential surface 1e of the annular outer circumferential wall 1a. When facing the inner circumferential surface 1e of the outer circumferential wall 1a, the locking lever 6 is remote from the inner circumferential surface 1e. In the following, for convenience of explanation, the outer circumferential surface 91b will be referred to as the proximal outer circumferential surface 91b, and the outer circumferential surface 91c
can be rephrased as the remote outer circumferential surface 91c. The cam plate 91
The function is to connect the locking projection 6a of the locking lever 6 to the annular outer peripheral wall
The inner circumferential surface 1e of a is pressed against the inner circumferential surface 1e of
The purpose is to keep it in a state free from e. 10th
In the figure, the proximal outer circumferential surface 91b of the cam plate 91 is connected to the annular outer circumferential wall 1.
The locking lever 6 and the annular outer peripheral wall 1 face the inner peripheral surface 1e of the
A is shown in a state in which the locking protrusion 6a is close to the inner peripheral surface 1e, and the locking protrusion 6a is pressing against the inner circumferential surface 1e. Further, in FIG. 11, the remote outer circumferential surface 91c of the cam plate 91 is connected to the inner circumferential surface 1 of the annular outer circumferential wall 1a.
A state in which the distance between the locking lever 6 and the annular outer circumferential wall 1a becomes remote when facing e, and the locking protrusion 6a is released from the inner circumferential surface 1e is shown. 1" is the notch step, and the locking protrusion 6
Only during the process of engagement between the cam plate 9 and the locking recess 1d,
The same number of locking recesses 1d are arranged in an adjoining relationship so that the proximal outer peripheral surface 91b of the ring-shaped outer peripheral wall 1a is moved further outward of the outer peripheral edge 2e of the rotating body 2 than the inner peripheral surface 1e of the annular outer peripheral wall 1a. It is provided at a suitable position on the inner circumferential surface 1e to maintain the position.

11/a is a support portion of the corner portion 91a or 91a/ of the cam plate 91 provided at the end of the notch step portion 11' in the direction of arrow A, and 1"b is a support portion from the support portion 1"a. Annular outer peripheral wall 1
This is the bottom surface of the notch step portion 11 provided with a continuous slope in the direction of arrow B up to the inner circumferential surface 1e of a.

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 is located at position 4 shown by the two-dot chain line.
The corner 9a of the cam plate is cut into the support portion 11 of the stepped portion 11.
The locking lever 6 is rotated in the direction of the arrow E while being abutted and supported by the lock lever 6, and the locking protrusion 6a is pushed from the locking recess 1d of the annular outer circumferential wall 1a, so the locking lever 6 moves from the position 4 to the ◎ position as shown in the figure. Moving. If you continue to pull the electric cord 4, the cam plate 9
, the outer short side 9c is the inner circumferential surface 1e of the annular outer circumferential wall 1a.
While maintaining a stable posture along the inner peripheral surface 1e, it slides in the direction of the arrow A, passing through the O position and moving to the @ position. When reaching the @ position, the corner 9a' of the outer short side 9c collides with and is supported by the support 11a of the notch step 11, and 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 corners 9a and 9a1 on the side that collides with the support part 11a are not provided with sharp corners. 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 causes its outer long side 9b to lie in the direction along the inner circumferential surface 1e, as shown by the two-dot chain line in FIG. The stopper projection 6a abuts against the inner circumferential surface 1e of the annular outer circumferential wall 1a, slides in the direction of the arrow A, and passes the position 8 while pressing this. In this state, the cam plate 9 is
Since the position of the shaft 10 is determined so that it does not press the locking protrusion 6a, even if the notch step 11 is located at the position where the notch step 11 is disposed, the locking protrusion 6a is positioned just before it fits into the locking recess 1d. When reaching the position θ, the outer tip corner 9a has already crossed the cut step 11. In addition, in order to ensure that the cut step 11 is crossed over, a larger centrifugal force is applied to the rear outer corner 9a/ when the rotary barrel 2 rotates in the direction of the arrow A than to the adjacent corner. It is desirable to adjust the weight of the tip so that the In this way, at the position θ, the outer long side 9'b of the cam plate 9
Since the tip end corner 9a has already passed through the support portion 11a of the notch step portion 11, when the electric cord 4 is subsequently pulled out, the locking protrusion 6a of the locking lever 6 is temporarily fitted into the locking recess 1d. However, the cam plate 9 does not fit into the notch step 11 3
After passing through the position, it moves directly to the position \7, and then continues the same movement. Therefore, the rotary drum 2 rotates smoothly in the direction of arrow A without being hindered, and the electric cord 4 can be drawn out smoothly. When the electric cord 4 is pulled out for the required length and the pulling force applied to the cord is released, the rotating barrel 2 rotates in the direction of arrow B in FIG. 6 due to the reverse rotational force of the helical spring 3. 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 falls into the bottom surface 11b of the notch step 11 as shown in FIG. Since the rotation barrel 2 is prevented from rotating in the direction of arrow B by the locking between the locking protrusion 6a and the locking recess 1d, the electric cord 4 is not wound up, and the electric cord 4 is only connected to the required length. The state in which the cord is pulled out of the reel is maintained. Next, when winding up the electric cord 4, as shown in FIG. 5, pull out the electric cord 4 a little and move the locking lever 6 from the engagement position as described above to the ◎ position and then to the O position. , the outer short side 9c of the cam plate 9 is brought into contact with the inner circumferential surface 1e of the annular outer circumferential wall 1a.

When the user releases the 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 outer short side 9c aligned with the inner circumferential surface 1e of the annular outer circumferential wall 1a. As shown, the cam plate 9 has a cut step 11.
At this time, the locking protrusion 6a falls into the bottom surface 11b of the
As shown in FIG. 7 and 9, due to the supporting action of the cam plate 9, the annular outer peripheral wall 1a is raised from the inner peripheral surface 1e, and the locking recess 1
Since it is prevented from being fitted into position d, it moves from position 9, 2, and 4 in the direction of arrow B without any locking action, and continues to move thereafter. 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.
Next, the method of using the second electric cord reel shown in FIG. 8 will be explained.
In the electrical cord reel shown in the figure, the corner 91a and the corner 9a, the corner 91a' and the corner 9aI, the proximal surface 91b and the long side 9b, the remote outer peripheral surface 91c and the short side 9c, the notch step 11 and the notch. The stepped portions 1" each have the same function.

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 91 of the locking lever 6 located at position 47 shown by the two-dot chain line is rotated in the direction of arrow E' while the corner 91a of the cam plate is in contact with and supported by the support part 117a of the stepped part 1''. Also, the locking protrusion 6a is located in the locking recess 1d of the annular outer peripheral wall 1a.
The locking lever 6 moves from the position 47 to the position ◎7 as shown in the figure. When the electric cord 4 is continued to be pulled, the cam plate 9 maintains a stable posture in which its remote outer circumferential surface 91c is along the inner circumferential surface 1e of the annular outer circumferential wall 1a.
It slides on the inner circumferential surface 1e in the direction of arrow A, passes through position 01, and moves to position @7. When you reach the position @7,
The corner portion 91aI of the remote outer circumferential surface 91c is the cut step portion 1.
After the collision, the cam plate 91 is supported by the support portion 11'a of 11'a, and rotates in the direction of arrow F/.When the electric cord 4 is further pulled out, the cam plate 91 is rotated as shown by the two-dot chain line in FIG. As shown, in order to make the adjacent outer peripheral surface 91b lie in the direction along the inner peripheral surface 1e, the locking protrusion 6a of the locking lever 6 is attached to the annular outer peripheral wall 1.
It comes into contact with the inner circumferential surface 1e of a, and slides in the direction of the arrow A while pressing it and passes the position 87. Since the position of the shaft 10 of the cam plate 91 is determined so as not to press the inner circumferential surface 1e in this state, even if the cam plate 91 reaches the position where the notch step 11' is arranged, the locking Protrusion 6a
When the outer end corner 91a reaches the position 7, which is just before it fits into the locking recess 1d, the corner 91a of the outer tip has already crossed the cut step 11. Like this (to)
At position 7, the corner 91a of the cam plate 91 has already passed the support part 1'a of the notch step 1', so when the electric cord 4 is subsequently pulled out, the locking protrusion 6a of the locking lever 6
Even if the cam plate 91 is once fitted into the locking protrusion 1d, the cam plate 91 does not fit into the cut step 1V and moves directly to the position 77 via the position (1)/, and continues to move in the same manner thereafter.
Therefore, the rotary drum 2 rotates smoothly in the direction of arrow A without being hindered, and the electric cord 4 can be drawn out smoothly. After pulling out the electric cord 4 for the required length, when the pulling force applied to the cord is released, the rotating body 2 is moved to the 10th position by the reverse rotational force of the helical spring 3
Since it rotates in the direction of arrow B in the figure, the locking protrusion 6a of the locking lever 6 fits into the locking recess 1d (see position 17 in FIG. 10), and the cam plate 91 is also notched as shown in FIG. Stepped part 1
Since it falls to the bottom surface 1Vb of V, the rotating body 2 is attached to the locking protrusion 6
Since rotation in the direction of the arrow B is prevented by the engagement between the electric cord 4 and the locking recess 1d, the electric cord 4 is not wound up, and only the required length of the electric cord is pulled out of the reel. The state is maintained. Next, when winding up the electric cord 4, as shown in FIG.
The remote outer circumferential surface 91c of the cam plate 91 is brought into contact with the inner circumferential surface 1e of the annular outer circumferential wall 1a. When the user releases the 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 91 has its remote outer peripheral surface 91c connected to the annular outer peripheral wall 1a.
The cam plate 91 slides in the direction of arrow B in a stable position along the inner circumferential surface 1e of the cam plate 91, and eventually falls onto the bottom surface 1''b of the notch step 1'' as shown in FIG. At this time, the locking protrusion 6a is raised from the inner peripheral surface 1e of the annular outer peripheral wall 1a due to the supporting action of the cam plate 91, as shown in FIG. Therefore, each position 9', 2/, and 47 is moved in the direction of arrow B without any locking action, and this movement is continued thereafter.
In this way, the rotary drum 2 rotates smoothly in the direction of arrow B without being hindered, and winds up all the electric cord pulled out from the reel. As detailed above, in the electric cord reel according to the present invention, a locking recess and a notch step are provided in the annular outer 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 cam plate corresponding to the notch step is rotatably supported on the locking lever, and the cam plate has a modified rectangular shape having a long side and a short side or an eccentric shaft. It has a deformed elliptical shape with a proximal outer circumferential surface and a remote outer circumferential surface depending on the support,
The engagement relationship between the locking recess and the locking lever is controlled by the orientation of the modified rectangular cam plate or the modified elliptical cam plate with respect to the annular outer circumferential wall, and With just one operation, 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 unlocking mechanism required for conventional electric cord reels, which improves manufacturing efficiency and reduces manufacturing costs. It has a structure that prevents excessive external force from being applied to the locking lever, so it has many excellent advantages, such as significantly reducing the failure rate.

[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 -, and FIG. Fig. 4 is a perspective view showing the state of the locking lever when engaged, Figs. FIGS. 9 to 11 are plan sectional views of the second electric cord reel according to the above, and each of them is a plane sectional view showing the operation status of the locking lever and the cam plate in the electric cord reel according to the above. 1... Main body case, 1a... Annular outer circumferential wall, 1c... Annular inner circumferential wall, 1d... Locking recess, 1e... Inner 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, 91...Cam plate, 9a, 9a',
91a, 91aξ...Corner part, 9b...Long side part, 91b...Proximity outer peripheral surface, 9c...
・Short side, 91c...Remote outer peripheral surface, 10...
...shaft, 11, 1 "... cut step, 13
1,132... Band-shaped electrode, 181,182...
...Sliding brush.

Claims (1)

[Scope of Claims] 1. An electric cord reel in which a rotary body, which is housed in a main body case and rotatably supported by a shaft, winds up an electric cord by means of a helical spring, wherein a circular base of the rotary body has a circular base. The locking lever is rotatably supported with a tip portion having a locking protrusion so as to be biased outward from the circular base surface, and is projected at an intermediate position between the shaft support and the tip portion of the locking lever. A deformed rectangular cam plate having four corners, two long sides, and two short sides is rotatably supported at the center of the provided shaft, and A locking protrusion of the locking lever engages with an inner circumferential surface of an annular outer peripheral wall that stands concentrically with the rotary drum on the outer side of the main body case to prevent the winding rotation of the rotary drum. The locking recess and the notch step with which the corner of the cam plate can be engaged and rotated when the cord is pulled out and rotated are formed so as to maintain a corresponding relationship with the locking protrusion and the corner to be engaged, respectively. The locking protrusion of the locking lever presses the inner peripheral surface of the annular outer peripheral wall when the long side of the cam plate faces the inner peripheral surface of the annular outer peripheral wall, and the locking protrusion of the locking lever presses the inner peripheral surface of the annular outer peripheral wall. The locking lever is configured such that it is separated from the inner peripheral surface when facing the inner peripheral surface of the annular outer peripheral wall, and the locking protrusion of the locking lever is located in a locking recess and a notch in the inner peripheral surface of the annular outer peripheral wall. If a portion other than the stepped portion is pressed, the outward long side of the cam plate is separated from the inner peripheral surface of the annular outer peripheral wall, and the locking protrusion is pressing the position closest to the locking recess. An electric cord reel characterized in that the tip end corner of the cam plate is configured to straddle the notch step. 2. In an electric cord reel in which a rotary body which 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 the protrusion is rotatably supported so as to be biased outward from 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 is provided with a shaft. A deformed elliptical cam plate having corners at both ends in the major axis direction and two curved outer circumferential surfaces on both sides from one end corner to the other end corner is provided with a proximate outer circumferential surface and a remote outer circumferential surface. The locking lever is engaged with the inner circumferential surface of an annular outer circumferential wall that is rotatably supported eccentrically on the minor diameter line so as to be able to rotate, and is erected on the outer side of the main body case concentrically with the rotating barrel. A locking recess with which a locking protrusion can engage to prevent winding rotation of the rotary drum and a notch step with which a corner of the cam plate can be engaged and rotated when the cord is pulled out and rotated are engaged with each other. The locking protrusion of the locking lever is formed so as to maintain a corresponding adjacent relationship with the target locking protrusion and the corner, and the locking protrusion of the locking lever has a proximal outer circumferential surface of the cam plate facing the inner circumferential surface of the annular outer circumferential wall. When the remote outer circumferential surface of the cam plate faces the inner circumferential surface of the annular outer circumferential wall, the inner circumferential surface is pressed, and when the remote outer circumferential surface of the cam plate is facing the inner circumferential surface of the annular outer circumferential wall, it is released from the inner circumferential surface, When the locking protrusion presses a portion of the inner peripheral surface of the annular outer peripheral wall other than the locking recess and the notch step, the proximal peripheral side of the cam plate separates from the inner peripheral surface of the annular outer peripheral wall, and An electric cord reel characterized in that, when the locking protrusion presses the position immediately adjacent to the locking recess, the tip corner of the cam plate straddles the notch step.