JPH036620Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a locking device for a winding mechanism for winding various cords such as electrical wiring cords, telephone wiring cords, and optical cords.

(Prior art) As a conventional technology, for example, Japanese Patent Application Laid-Open No. 48-69078
There is a publication.

(Problems to be Solved by the Invention) An object of the invention is to provide a locking device for a winding mechanism that allows the cord to be easily locked and unlocked in the unwinding state.

(Means for Solving the Problems) The locking device of the winding mechanism of the present invention has a frame body on which a reel body for winding a cord is rotatably supported, and a locking claw formed on the reel body. A lock piece is supported so as to be movable and swingable in the cord feeding direction and the cord winding direction in order to engage and disengage from the cord, and the moving direction side portion of the lock piece that has been moved to the moving end is attached to the reel body. A spring is installed in contact with the lock piece in order to urge the lock piece toward the center of rotation, and a spring is attached to the frame body to reverse the swinging posture of the lock piece that has swung toward the cord winding direction. A guide piece is provided at a position apart from the lock piece in the cord feeding direction, and furthermore, a guide piece is provided in the vicinity of the center of the lock piece so that when the rocking position of the lock piece is reversed, the guide piece is arranged in a protruding position. A protrusion protruding toward the spring is formed at a position offset from the swing fulcrum so as to be biased by the spring, and a top protruding toward one side of the lock is formed in the center of the spring. has a configuration in which a ridge connecting the rotation center and the swing fulcrum and arranged on a neutral line is bent so that when the lock piece moves, the protruding piece moves over the ridge corner. have

(Function) The lock piece is supported so that it can move and swing in the cord pay-out direction and the cord wind-up direction with respect to the frame body of the winding mechanism. In the oscillating state, it is engaged with a locking pawl provided on the reel body to restrict the rotational movement of the reel body and lock the cord feeding state, and the reel body is slightly rotated in the cord feeding direction to release the spring. reversing the swinging posture of the locking piece by force, disengaging the locking piece from the locking pawl, and releasing the locked state;
Further, when the lock piece is moved from the cord feeding direction side to the cord winding direction side, the lock piece is brought into contact with the guide piece to reverse the swinging posture of the lock piece.

Also, when the lock piece moves, the protrusion formed near the center of the lock piece is forced to ride over the ridge corner formed in the center of the spring, and when the rocking position of the lock piece is reversed. Then, the spring urges the lock piece toward the rotation center of the reel body at a position deviated from its swing fulcrum, and the position where the lock piece and the spring come into contact is aligned with the rotation center and the swing center. The neutral state in which the lock piece cannot swing is eliminated by deviating from the center line passing through the pivot point.

(Example) Next, an example in which the present invention is embodied in a cord reel for telephone wiring will be described with reference to the drawings.

The frame body 1 of the cord reel R is formed into a case shape in which a base 2 having a substantially bottomed cylindrical shape and a lid portion 3 having approximately the same shape as the base 2 and covered by the base 2 are assembled in a separable manner. A stepped cylindrical support shaft 4 is erected at the center of the base 2, while a bulge 1 is formed protrudingly from a part of the side trunk of the frame body 1.
A cord insertion opening 5 is opened in a.

The reel body 6 loaded into the frame body 1 is supported horizontally rotatably at a distance slightly above the bottom surface of the base 2 via a support shaft 4, and is made up of a disc-shaped lower plate 6a and a middle plate 6b. A mainspring spring 7 is wound between the wires and the outer end is connected to the side wall of the reel body 6, and the inner end is connected to the spindle 4, and is always in the cord winding direction (Q direction).
Forced to the side. An outer wrapping portion 6f is formed between the outer end of the upper plate 6c and the flange 6d outwardly of the partition wall 6e vertically provided slightly inward of the outer peripheral edge of the reel body 6; An inner wrapping portion 6g is formed between the upper plate 6c and the middle plate 6b inside the wrapping portion 6f, and is partitioned by a partition wall 6e.
A ring-shaped boss portion 6h is protruded from the lower side near the central portion of
is formed in an almost circular shape.

The extension cord 9 is wound in multiple layers in the outer wrapping part 6f of the reel body 6 from the inner layer to the outer layer in a state aligned in the rotational axis direction of the reel body 6, and a connecting plug etc. is connected to the extension cord 9. The outer end portion is pulled out of the frame body 1 through the cord insertion hole 5 of the frame body 1, while the base end portion is pulled out from the partition wall 6 of the reel body 6.
When the extension cord 9 is fed out, the reel body 6 is inserted into the cord hole penetrated through the cord hole and fixed to the inner circumferential surface of the partition wall 6e, and the reel body 6 is moved in the P direction (cord feeding direction).
rotated to

The auxiliary cord 10, which is set to have approximately the same length as the extension cord 9, is attached to the inner winding portion 6g of the reel body 6.
The extension cord 9 is wound in a single layer in a direction opposite to the winding direction of the extension cord 9, with vertical movement restricted within the cord.
The base end of the auxiliary cord 10 is pulled out to the side trunk of the frame body 1 through the support shaft 4 and connected to the outlet 12 attached to the side trunk, while the outer end of the auxiliary cord 10 is connected to the extension cord 9. along with the base end of the reel body 6
An extension cord 9 is fixed to the inner peripheral surface of the partition wall 6e.
conductively connected to the

The lock piece 24 attached to the bottom surface of the base 2 of the frame body 1 passes through an oblong insertion hole 26 provided through the base 24a and is inserted into the base 2 via a guide pin 25 screwed onto the base 2. The base portion 24a is supported to be movable in the direction side and the Q direction side and to be swingable around the swing fulcrum a, and a reel is formed in a tapered shape on the P direction side and the Q direction side of the base 24a, respectively. Extended portions 24b, 24b extending so as to be able to come into sliding contact with the sliding surface 6i of the body 6 are arranged in a substantially bilaterally symmetrical manner, and the central portion of the locking piece 24 is located on the upper surface near the center of the top surface of the base portion 24a. A projecting piece 27 whose top is formed into a sharp shape is located at a portion slightly deviated toward the Q direction side.
is installed protrudingly.

The lock piece 24 is always biased toward the rotation center b side of the reel body 6 in order to fix the swinging posture of the lock piece 24 at the end of the movement.
A spring 28 in the form of a leaf spring installed opposite to the lock piece 24 is fixed at both ends by a pair of left and right spring receivers 29, 29 provided on the base 2 of the frame body 1, respectively, protruding outward from the extension portion 24b of the lock piece 24. It is held and comes into elastic contact with the projecting piece 27 of the lock piece 24, and at its center there is a neutral line C that is slightly bent inward and passes through the rotation center b of the reel body 1 and the swinging fulcrum a of the lock piece 24. A ridge 28a disposed above is formed, and the lock piece 24
While moving towards the P direction or the Q direction,
The top of the protruding piece 27 of the locking piece 24 is connected to the spring 28.
When the projection piece 27 crosses the ridge corner 28a and crosses the neutral line c, the portion of the lock piece 24 on the side of the movement direction beyond the neutral line c is pressed toward the rotation center b side, and the lock piece 24 moves toward the P direction side. Alternatively, when the lock piece 24 is displaced to the moving end in the Q direction and the center of gravity of the lock piece 24 deviates from the swing fulcrum a, the lock piece 24 elastically swings toward the P direction or the Q direction by the elastic force of the spring 28. The tip of the extending portion 24b on the moving direction side is held in a swinging posture in which it is in elastic contact with the sliding surface 6i of the reel body 6.

The guide piece 30 is provided on the bottom surface of the base 2 of the frame body 1 so as to project from the lock piece 24 at a slight distance from the P direction side, and the inner surface thereof has a distance between its P direction end and the sliding surface 6i. Its Q-direction side end and sliding surface 6i
When the lock piece 24 moves from the P direction side to the Q direction side with the lock piece 24 swinging in the Q direction side, the P The tip of the extension portion 24b on the direction side comes into contact with the inner surface of the guide piece 30 and locks the lock piece 2.
4 can be reversed to a swinging posture in which it is tilted downward toward the P direction.

A pair of locking claws 31 protruding from the sliding surface 6i of the reel body 6 to engage and disengage the lock piece 24,
31 pushes the lock piece 24 in the Q direction when the reel body 6 rotates in the Q direction and engages the lock piece 24 at the moving end, and locks when the reel body 6 rotates in the P direction. In order to push the piece 24 in the P direction and bring it into contact with the guide piece 30, it is arranged at a rotationally symmetrical position of 180 degrees, and the vicinity of the end on the Q direction is formed into a tapered shape, so that the lock piece 24 When the reel body 6 rotates in the P direction by letting out the extension cord 9 with the locking member swinging in the P direction, both locking claws 3
1 pushes up the P-direction side extension 24b of the lock piece 24 and passes inside the lock piece 24, while the reel body 6 rotates in the Q direction with the lock piece 24 swinging in the Q direction. At times, both locking claws 31 push up the Q-direction side extension 24b of the lock piece 24 and pass inside the lock piece 24. And lock piece 24
When the reel body 6 moves to the moving end in the Q direction and swings in the Q direction (see Fig. 3 A), the reel body 6 moves to the moving end in the Q direction.
When rotated in the direction, the lock piece 24 engages the locking pawl 3.
1, the locking piece 24 is pushed in the P direction, and the swinging fulcrum a of the locking piece 24 moves in the Q direction (see FIG. The locking piece 24 comes into contact with the inner surface of the guide piece 30, and the position of the locking piece 24 is changed to a swinging position tilted downward in the P direction (see FIG. 3, C), allowing the locking pawl 31 to rotate in the P direction. (see Figure 3 D), lock piece 2
4 is held in a posture swung toward the P direction, the reel body 6 is rotated in the P direction, and the extension cord 9 can be continuously fed out. When the extension cord 9 is stopped feeding out in this state and the extension cord 9 is released, the reel body 6 rotates in the Q direction by the elastic force of the mainspring spring 7, and the locking pawl 31 abuts against the lock piece 24. The lock piece 24 is pushed by the locking pawl 31 to the moving end in the Q direction, and the swinging fulcrum a is moved to the Q direction. While moving from the direction side to the P direction side,
The rotational movement of the locking pawl 31 and the rotational movement of the reel body 6 are prevented, and the extended reel 9 is locked in its unwinding state (see FIG. 4B). Furthermore, when the extension cord 9 is slightly let out in this state and the reel body 6 is slightly rotated in the P direction, the lock piece 24 and the locking pawl 3
1 is disengaged, and the swinging posture of the lock piece 24, which had swung in the P direction, is changed to the Q direction by the elastic force of the spring 28 (Fig. 4 C, Fig. 5 I). ), the locking pawl 31 is allowed to rotate in the Q direction (see FIG. 5 B and C), and the reel body 6
The extension cord 9 can be continuously wound by rotating it in the Q direction by the elastic force of the mainspring spring 7.

Next, the operation and effects of the embodiment having the above configuration will be explained.

In this example, the reel body 6 for winding the cord 9
The frame body 1 is rotatably supported on the frame body 1 so as to be movable and swingable in the cord feeding direction and the cord winding direction in order to engage and disengage from the locking pawl 31 formed on the reel body 6. Lock piece 2
4, and a spring 2 that is in contact with the lock piece 24 in order to bias the moving direction side portion of the lock piece 24 that has moved to the moving end toward the rotation center b of the reel body 6.
8 is attached to the frame body 1, and a guide piece is provided on the frame body 1 at a position away from the lock piece 24 in the cord payout direction in order to reverse the swinging posture of the lock piece 24 that has swung in the cord winding direction side. 3
Further, near the center of the lock piece 24, a spring 28 is attached at a position where the lock piece 24 is deviated from its swing fulcrum a when the swing position of the lock piece 24 is reversed. A protrusion 27 is formed that protrudes toward the spring 28 so as to be biased, and a locking piece 24 is provided at the center of the spring 28.
A ridge corner portion 28a that protrudes to the side and whose top portion is disposed on a neutral line c connecting the rotation center b and the swing fulcrum a,
The protruding piece 27 is bent so that it moves over the ridge 28a when the locking piece 24 moves.

Therefore, the mechanism for locking the extended state of the extension cord 9 can be made more compact and simplified to accurately lock the extension cord 9, and the locking and unlocking operations for the extended extension cord 9 can be easily performed. This has the effect of simplifying and accurately performing the switching operation between feeding out and winding up the extension cord 9.

In particular, in this example, in order to bias the lock piece 24 toward the rotation center b, the ridge 28a of the spring 28 is
is brought into elastic contact with the protruding piece 27 of the locking piece 24, so that when the locking piece 24 is moved from one side of the moving end to the other side, the top of the protruding piece 27 of the locking piece 24 crosses over the ridge corner 28a and With the protruding piece 27 crossing the neutral line c and the swing fulcrum a of the locking piece 24 being reliably deviated from the center of gravity of the locking piece 24, the protruding piece 27 is pressed toward the center of rotation b by the spring 28 to lock the locking piece 24. The rocking posture of the lock piece 24 can be accurately changed, and the portion of the lock piece 24 on the opposite side of the movement direction is pressed, causing the lock piece 24 to swing in the opposite direction of movement, and the projecting piece 27 of the lock piece 24 moves to the neutral point. It is possible to reliably prevent malfunctions caused by

(Effect of the invention) Since the present invention is configured as described above, it is possible to simplify the locking and unlocking operations for the extended extension cord that has been fed out, and to accurately perform the switching operation between feeding and winding the cord. At the same time, it has the effect of solving the problem of the locking piece being in a neutral state where it cannot swing and becoming unable to lock.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view of the cord reel, and FIG.
X-ray cross-sectional view, Figures 3A, 3B, 3C, and 2 are plan views sequentially explaining the operation of the locking mechanism when the cord is fed out;
Figure 4 A, B, and C are plan views that sequentially explain the locking and unlocking operations of the lock mechanism, and Figures 5 A, B, and C are plan views that sequentially explain the operation of the lock mechanism during cord winding. be. 1...Frame body, 6...Reel body, 24...
Lock piece, 28... Spring, 30... Guide piece, 31... Locking claw.

Claims (1)

[Scope of utility model registration request] A frame body on which a reel body for winding the cord is rotatably supported has a movement movement in the cord payout direction and the cord winding direction in order to engage and disengage the locking pawl formed on the reel body. and a lock piece supported in a swinging manner, and a spring that is in contact with the lock piece for urging the moving direction side portion of the lock piece that has moved to the moving end toward the rotation center of the reel body. At the same time, a guide piece is protruded from the frame body, which is arranged at a position away from the lock piece in the cord payout direction, in order to reverse the swinging posture of the lock piece that has swung in the cord winding direction. Further, near the center of the lock piece, when the rocking position of the lock piece is reversed, the lock piece is biased by the spring to a position deviated from its swinging fulcrum. a protruding piece protruding toward the spring side, and a ridge angle protruding toward one side of the lock at the center of the spring, the top of which is disposed on a neutral line connecting the rotation center and the swing fulcrum. Department,
A locking device for a winding mechanism, characterized in that the protruding piece is bent so that it moves over the ridge corner when the locking piece moves.