JPH073647B2 - Release mechanism of locking device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present application relates to a releasing mechanism of a locking device that locks an operating member such as an operating lever in a cassette tape player.

Conventional technology Conventionally, a fast-forward lever in a cassette tape player,
A locking device for locking an operating member such as a rewinding lever or an eject lever is generally used when the operating member (30) is pressed against its restoring spring (31) as shown in FIG. The locking projection (32) provided on the one side is provided on one piece (34) a of the rotatable locking member (34) which is elastically biased in one direction by the restoring spring (33). It is configured to be locked in the locking hole (35), and its release mechanism has an electromagnetic plunger (38) having a spring (37) that constantly biases the movable rod (36) in the protruding direction. A pair of flange pieces (39) and (40) are spaced from each other at the tip of the movable rod (36), and the other piece (34) b of the locking member (34) is engaged between them. The electromagnetic plunger (38) is energized, and the movable rod (36) sinks against its restoring spring. When it is moved in the opposite direction, the flange piece (39) presses the lower piece (34) b of the locking member (34), and this pressing action causes the locking member (34) to act on its restoring spring (33). It is configured so that the locking projection between the locking projection (32) and the locking hole (35) is released by rotating strongly against it.

SUMMARY OF THE INVENTION However, according to the above-described conventional configuration, the restoring spring of the movable rod acts as a load when the movable rod presses the locking member, so that the pressing action is reduced. In addition to having the movable spring, the movable spring has a movable rod so as not to cause abnormal noise or malfunction due to the external vibration when the movable spring is susceptible to external vibration, such as in a vehicle. It is necessary to strongly hold in the restored state. In this case, since a spring having a relatively strong spring force is used, not only the pressing force described above is further reduced, but also a large capacity electromagnetic plunger is required. Therefore, it requires a lot of mounting space for its length, and it causes high cost, and also works to assemble the restoring spring to the movable rod. There was a defect that it was troublesome.

Therefore, the present application uses a magnet to improve the above-mentioned defects of the conventional one.

Means for Solving the Problems In order to achieve the above-mentioned object, the present application moves a working member from a first position that locks against an urging force, and from that position to a second position that resists a return spring. In the process, a locking member that releases the locked state of the operating member, and a movable rod that slidably engages with the locking member when the operating member is moved from the inoperative position to the operating position by energization. And an electromagnetic plunger that moves the locking member to the second position against the restoring spring by the pressing action, and a magnet that attracts the movable rod of the electromagnetic plunger and holds the inactive position. In the above structure, a flange for attracting a magnet and pressing a locking member is provided at the tip of the movable rod of the electromagnetic plunger, or a thin rod extending in the axial direction is provided in the upper half of the movable rod. Diameter Is provided, and the pressed portion of the locking member is slidably engaged with this small-diameter portion position, and the polarity of the magnet attraction surface and the polarity with which the movable rod is excited when the electromagnetic plunger is energized. And are equal.

Operation However, in the unlocked state shown in FIG. 1, the locking member is in the first position, the electromagnetic plunger is in the inoperative position, and the movable rod is attracted to the magnet and held in the protruding state. When the operating member is operated against the biasing force from this state, it engages with the locking member as shown in FIG. 2, the operating member is in the operating state, and the locking member is Each is held in the first position.

Next, when the electromagnetic plunger is energized and actuated from the locked state shown in FIG. 2, the movable rod is attracted in the retracted direction and separated from the magnet, and at that moment, the movable rod suddenly moves and moves. The locking member is pressed, and due to the pressing action, the locking member is displaced from the first position to the second position against the restoring spring, and in the process, the locking member and the operating member are locked. To be solved. Then, when the locking member is restored to the first position by the restoring spring, the movable rod of the electromagnetic plunger slidably engaged therewith is also restored and is again attracted to the magnet.

In the above configuration, the polarity of the attracting surface of the magnet,
When the polarity of exciting the movable rod when the electromagnetic plunger is energized is made equal, the retracting operation of the movable rod becomes quicker and the hammer action becomes effective.

Example Hereinafter, an example of the present application will be described in detail with reference to the drawings.
(1) is an operation member such as a fast forward lever, a rewind lever or an eject lever in a cassette tape recorder, which is formed by engaging the long hole (2) and the pin (3).
For example, it is slidably attached to the deck plate in the longitudinal direction, and the operating member (1) is provided with a restoring spring (4) and a mountain-shaped locking projection (5), respectively. (6) is a pair of pieces (6) a, (6) extending in a right angle direction
With a rotatable locking member having b, the restoring spring (7) is urged to rotate in one direction, and the urging force causes one piece (6) a to have an engaging protrusion (5). It is pressed against the side edge of the member (1) and one of the pieces (6)
A locking hole (8) for engaging and disengaging the locking projection (5) is formed in a. Reference numeral (9) is an electromagnetic plunger, and a pair of collar pieces (11) and (12) are spaced apart from each other at the tip of the movable rod (10). The pair of collar pieces (11) and (12). Meanwhile, the other piece (6) b of the locking member (6) is slidably engaged. (13) is a magnet that holds the protruding state of the movable rod (10) by adsorbing one of the collar pieces (11), and this magnet is attached to, for example, a part of the device frame (14).

Then, one piece (6) a of the locking member (6) contacts the side edge of the actuating member (1), and the other piece (6) b is placed on the lower flange piece (12). The actuating member (1) is restored for the fast forward operation, the rewind operation or the eject operation from the state shown in FIG. 1 in which the upper flange piece (11) is in contact with and is attracted to the magnet (13). When pressed against the spring (4), the locking projection (5) and one piece (6) a of the locking member (6) come into contact with each other, so that the locking member (6) is restored to its restoring spring ( After being temporarily rotated against 7), as shown by the solid line in FIG. 2, the locking projection (5) and the locking hole (8) are locked and the operating member (1) is pressed. Held in a state.

Next, when the electromagnetic plunger (9) is energized to release the locked state from the state shown by the solid line in FIG. 2, the movable rod (10) is attracted, and the attraction action causes the magnet (13) and the upper collar piece ( The attraction with 11) is released, and it rapidly operates in the direction of immersion, and at the time of this operation, the upper piece (11) of the locking member (6) presses the other piece (6) b, As shown by the phantom line in the figure, the locking member (6) momentarily rotates clockwise against the restoring spring (7) by the pressure action, and the locking projection (5) and the locking hole ( 8) unlocked with
The actuating member (1) is restored by its restoring spring (4), and when the electromagnetic plunger (9) is de-energized, the locking member (6) is restored by its restoring spring (7). The other piece (6) b pushes up the upper flange piece (11), and the movable rod (10) is again attracted to the magnet (13).

In the above embodiment, the collar piece (11), the upper part of the movable rod (10),
(12) are spaced apart, and in the non-actuated state, the other piece (6) b of the locking member (6) is brought into contact with the lower flange piece (12). As described above, one piece (6) a of the locking member (6) is brought into contact with the side edge of the actuating member (1) or a separate stopper is provided, and the locking member (6) by the restoring spring (7) is provided. ), When the structure is configured to receive the urging force in one direction, the lower collar piece (12) can be omitted as shown in FIG. 3, and FIG. 4 shows a pair of collar pieces ( 11) and (12) are omitted, and the movable rod (10)
A small-diameter portion (10) 'having a non-circular cross section is preferably formed in the upper half portion by cutting, for example, and the other piece (6) a of the other locking member (6) is formed as shown in FIG. The case where the engaging groove (15) is provided and the engaging groove (15) is engaged with the small diameter portion is shown. According to this configuration, the collar pieces (11), (1
The attachment of 2) can be omitted, and the other piece (6) b of the locking member (6) and the movable rod (10) can be easily engaged.

In the above, the upper flange piece (11) of the movable rod (10)
The magnetic pole on the surface of the magnet (13) that attracts the magnet is set to be the same as the magnetic pole of the upper flange piece (11) magnetized by the leakage magnetic flux when the electromagnetic plunger (9) is energized. When the electromagnetic plunger (9) is energized, a repulsive force acts between the magnet (13) and the upper flange piece (11) of the movable rod (10), so that the upper flange piece (11). The striking force acting on the other piece (6) b of the locking member (6) of (1) is obtained more strongly.

FIG. 6 shows another embodiment in the case of being applied to a rotation control means of a notch gear used in a tape traveling direction switching mechanism, a head plate operating mechanism or an eject lever driving machine in a cassette tape player,
In this structure, the locking member (16) has a long hole (17) and a pin (18).
The movable piece (10) of the electromagnetic plunger (9) is movable in the same direction as the retractable direction through the engagement with, and the notch is formed by the movement of the locking piece (19) provided in the locking member (16). The locking projection (21) provided on the gear (20) is engaged and disengaged to control the rotation of the notch gear (20), that is, the operating member. In the figure, (22) is a spring for applying an initial rotational force to the notch gear (20) by being in pressure contact with the cam (23) fixed to the rotation center axis of the notch gear (20), (24) is a drive gear, and (25) ) Indicates a restoring spring of the locking member (16), and (26) indicates a pressed portion.

EFFECTS OF THE INVENTION As described above, according to the present application, the restoring spring of the movable rod in the electromagnetic plunger is not necessary, and the movable rod becomes the no-load state at the moment when it is separated from the magnet, so that an extremely large striking force can be obtained. Since the locked state can be reliably released, and the capacity of the electromagnetic plunger is relatively small, it can be made compact and inexpensive, and the movable rod is attracted to the magnet. There is no fear that abnormal noise or malfunction will occur due to external vibration, and in particular, a small diameter portion extending in the axial direction is provided in the upper half of the movable rod, and the abutted portion of the locking member is located at the position of this small diameter portion. When slidably engaged, the work of engaging the movable rod and the locking member becomes easier, and the polarity of the attracting surface of the magnet and the movable rod when the electromagnetic plunger is energized are excited. When the magnetized polarities are made equal, there is an advantage that the pressing force becomes more effective due to the repulsive action of the movable rod and the magnet.

[Brief description of drawings]

The drawings show an embodiment of the present application, in which FIG. 1 is a plan view in an unlocked state, FIG. 2 is a plan view in a locked state, FIG. 3 and FIG.
FIG. 4 shows another embodiment corresponding to FIG. 1, and FIG. 5 shows a fourth embodiment.
FIG. 6 is a partially exploded enlarged perspective view of the figure, FIG. 6 is a plan view showing another embodiment, and FIG. 7 is a conventional configuration diagram. In the figure, (1) is an operating member, (5) is a locking projection, (6),
(16) is a locking member, (8) is a locking hole, (9) is an electromagnetic plunger, (10) is a movable rod, (10) 'is a small diameter portion, (1)
1) and 12 are collar pieces, 13 are magnets, and 15 are engagement grooves.

Claims (4)

[Claims] 1. A first position for locking an actuating member against its biasing force, and a second position from that position against a return spring.
A locking member that unlocks the locked state of the operating member during the process of moving to the position, and a movable rod that slidably engages with the locking member when moved from the inoperative position to the operating position by energization. By pressing the locking member and pressing the locking member, the electromagnetic plunger that moves the locking member to the second position against the return spring is attracted, and the movable rod of the electromagnetic plunger is attracted. A release mechanism for the locking device that consists of a magnet that holds the operating position. 2. The unlocking mechanism for the locking device according to claim 1, wherein a flange that attracts the magnet and presses the locking member is provided at the tip of the movable rod of the electromagnetic plunger. 3. A small diameter portion extending in the axial direction is provided in the upper half of the movable rod of the electromagnetic plunger, and the pressed portion of the locking member is slidably engaged with the position of the small diameter portion. Item 2. A release mechanism for a locking device according to Item 1. 4. The releasing mechanism of the locking device according to claim 1, wherein the polarity of the attracting surface of the magnet is equal to the polarity of exciting the rod that moves when the electromagnetic plunger is energized.