JPH01233509A - Release mechanism for detaining device - Google Patents

Abstract

PURPOSE:To surely release a detained state by sucking a movable rod by bringing an electromagnetic plunger to electric conduction, hitting and pressing a detaining member by the operation of the movable rod, and releasing a detension of the detaining member and an operating member. CONSTITUTION:From a state shown by a full line in the figure, when an electromagnetic plunger 9 is brought to electric conduction in order to release its detained state, a movable rod 10 is sucked. By such sucking action, an adsorption of a magnet 13 and the upper collar piece 11 is released and they operate quickly in the sinking direction. By such operation, the other piece 6b of a detaining member 6 is hit and pressed by the collar piece 11. By such hitting and pressing action, the member 6 turns clockwise instantaneously against a restoring spring 7 as shown by a virtual line in the figure and the detention of a detaining projecting part 5 and a detaining hole 8 is released, and an operating member 1 is restored by the restoring spring. When the electric conduction of the plunger 9 is disconnected, the member 6 is restored by the spring 7, and at the time of restoration, the piece 6b pushes up the collar piece 11, and the rod 10 is adsorbed again to the magnet 13.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present application relates to a release mechanism for a locking device that locks an operating member such as an operating lever in a cassette tape player, for example.

Conventional technology: Fast forward lever 1 in a cassette tape player
A locking device for locking an actuating member such as a rewind lever or an eject lever generally locks when the actuating member (30) is pressed against its restoring spring (31), as shown in FIG. For example, one piece (3) of a rotatable locking member (34) is elastically biased in one direction by a restoring spring (33).
4) It is configured to lock into the locking hole (35) provided at
The movable rod (36) of the electromagnetic plunger (38) has a spring (37) that constantly biases the movable rod in the projecting direction.
A pair of collar pieces (39) and (40) are provided at the tip of the locking member (34), and the other piece (3) of the locking member (34) is placed between them.
4) When the electromagnetic plunger (38) is energized and the movable rod (36) moves in the retracting direction against its restoring spring, the collar piece (39) becomes the locking member. The lower piece (34)b of (34) is pressed, and this pressing action causes the locking member (34) to rotate strongly against its restoring spring (33), thereby causing the locking protrusion to (32) and the locking hole (35) are disengaged from each other.

Problems to be Solved by the Invention However, according to the above-mentioned conventional configuration, the restoring spring of the movable rod acts as a load when the movable rod presses the locking member, so there is an inconvenience that the pressing action is reduced. In addition to restoring the movable rod, the restoring spring also restores the movable rod to prevent abnormal noises or malfunctions from occurring due to external vibrations in cases where external vibrations are easily received, such as in vehicles. It is necessary to strongly hold the spring in its restored state, and in this case, a relatively strong spring is used, which not only further reduces the above-mentioned impact force, but also uses a large-capacity electromagnetic plunger. Because of the required length, mounting at the same length requires a lot of space, increases costs, and has the disadvantage that the work of assembling the restoring spring to the movable rod is troublesome.

Therefore, the present application improves the above-mentioned defects of the conventional device by using a magnet.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a first position in which the actuating member is locked against its biasing force, and a second position in which the actuating member is moved from that position against a return spring. A locking member that releases the locking state of the operating member in the process, and a movable rod that is slidably engaged with the locking member when the actuating member is moved from the non-operating position to the operating position by energization. an electromagnetic plunger that moves the locking member to a second position against the restoring spring by applying force to the electromagnetic plunger; and a magnet that attracts the movable rod of the electromagnetic plunger and maintains the inoperative position. In the above configuration, a collar is provided at the tip of the movable rod of the electromagnetic plunger to attract the magnet and press against the locking member, or a thin collar extending in the axial direction is provided in the upper half of the movable rod. A diameter portion is provided, and the pressed portion of the engaging member is slidably engaged at the position of this narrow diameter portion, and the rod that moves when the electromagnetic plunger is energized is determined by the polarity of the attracting surface of the magnet. It is made by making the polarity equal to the polarity.

Function: 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 actuating member is operated from this state against the biasing force, it engages with the locking member as shown in FIG. are each held in a first position.

Next, from the locked state shown in FIG. 2, when the electromagnetic plunger is energized and actuated, the movable rod is attracted in the retracting direction and separated from the magnet, and at that moment, the movable rod rapidly moves and 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. Unraveled. When the locking member is restored to the first position by the restoring spring, the movable rod of the electromagnetic plunger that is slidably engaged with the locking member is also restored and attracted to the magnet again.

In the above configuration, the polarity of the attracting surface of the magnet,
When the polarity with which the movable rod is excited when the electromagnetic plunger is energized is made equal to the polarity with which the movable rod is excited, the retracting action of the movable rod becomes faster and the hammer action becomes more effective.

Embodiments Below, embodiments of the present application will be described in detail based on the drawings (1
) is an operating member such as a fast-forward lever, rewind lever, or eject lever in a cassette tape recorder, and is slidable in the longitudinal direction against, for example, a deck plate by engaging the elongated hole (2) and the bottle (3). A restoring spring (4) is attached to this operating member (1).
) and a mountain-shaped locking protrusion (5), respectively. (6
) is a rotatable locking member having a pair of pieces (6)a and (6)b extending in a right angle direction, and is biased to rotate in one direction by a restoring spring (7). an actuating member (1) in which the piece (6) a has a locking protrusion (5);
A locking hole (8) is provided in one piece (6)a to be pressed into contact with the side edge of the locking protrusion (5). (9) is an electromagnetic plunger, and its movable rod (10)
A pair of collar pieces (I l) and (12) are spaced apart from each other at the tip of the locking member (6). Piece (6)b is slidably engaged. (13) is a magnet that maintains the protruding state of the movable rod (10) by adsorbing one of the collar pieces (11), and this is attached to, for example, a part of the 8 frame (14).

Thus, one piece (6) a of the locking member (6) contacts the side edge of the actuating member (1), and the other piece (6) b rests on the lower collar piece (12). The first collar piece (11) is in contact with the magnet (13) and the upper collar piece (11) is attracted to the magnet (13).
From the state shown in the figure, for fast forwarding, rewinding, or ejecting, move the actuating member (1) to its restoring spring (
4), the locking protrusion (5) and the locking member (
The locking member (6) is brought into contact with one piece (6)a of the locking member (6).
) temporarily rotates against the restoring spring (7), and then the locking protrusion (5) and the locking hole (8) lock together, as shown by the solid line in Figure 2. The actuating member (1) is held in a pressed 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 (
lO) is suctioned, and due to the suction action, the adsorption between the magnet (13) and the upper collar piece (11) is released, and the locking member (6) is rapidly moved in the direction of retraction. The upper collar piece (11) presses the other piece (6)b, and this pressing action causes the locking member (6) to close as shown by the imaginary line in the figure.
is instantaneously rotated clockwise against the restoring spring (7), the locking protrusion (5) and the locking hole (8) are unlocked, and the actuating member (1) is The locking member (6) 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). b pushes up the upper collar piece (11), and the movable rod (10) is again attracted to the magnet (13).

In the above embodiment, the collar piece (11) is attached to the upper part of the movable rod (10).
), (12) are installed separately and in their inactive state,
The other piece (6)b of the locking member (6) is attached to the lower collar piece (12).
), but as shown in the figure, one piece (6)a of the locking member (6) is brought into contact with the side edge of the actuating member (1), or a stopper is provided separately. If the configuration is such that the restoring spring (7) is provided to prevent the locking member (6) from being biased in one direction, the lower flange piece (12) is omitted as shown in Fig. 3. can also be the fourth
The figure omits the pair of collar pieces (11) and (12), and forms a narrow diameter part (10)' preferably with a non-circular cross section in the upper half of the movable rod (10) by cutting, for example. An engagement groove (15) is provided in the other piece (6)a of the other locking member (6) as shown in FIG. 5, and the engagement groove (15) is engaged with the narrow diameter portion. According to this configuration, the attachment of the collar pieces (11) and (12) can be omitted, and the other piece (6)b of the locking member (6) and the movable rod (10 ) becomes easy to maintain.

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

FIG. 6 shows another embodiment in which the invention is applied to a rotation control means for a notched gear used in a tape running direction switching mechanism, a head plate actuator structure, an eject lever drive mechanism, etc. in a cassette tape player. Ori,
In this configuration, the locking member (16) is connected to the elongated hole (17) and the bottle (
18), the electromagnetic plunger (9) can be moved in the same direction as the moving rod (10), and by movement of the locking piece (19) provided on the locking member (16). The notch gear (20) is configured to be engaged with and disengaged from a locking protrusion (21) provided on the notch gear (20) to control rotation of the notch gear (20), that is, the operating member.

In the figure, (22) is a spring that applies 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 the drive gear, and (25) ) indicates the restoring spring of the locking member (16), and (26) indicates the pressed portion.

Effects of the Invention As described above, according to the present application, there is no need for a restoring spring for the movable rod in the tKn plunger, and the movable rod becomes unloaded the moment it separates from the magnet, so an extremely large impact force can be obtained. In addition to being able to reliably release the locked state, the capacity of the electromagnetic plunger is also relatively small, so it can be made smaller and cheaper, and the movable rod is attracted to the magnet. In order to eliminate the risk of abnormal noises and malfunctions caused by external vibrations, a narrow 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 this narrow diameter portion. When the movable rod and the locking member are slidably engaged, the engagement between the movable rod and the locking member is facilitated, and the polarity of the attracting surface of the magnet and the polarity with which the movable rod is excited when the electromagnetic plunger is energized are different. When they are made equal, there is an advantage that the striking action becomes more effective due to the repulsive action between the movable rod and the magnet.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a plan view in an unlocked state, FIG. 2 is a plan view in a locked state, and FIGS. 3 and 4.
The figures are other embodiment figures corresponding to Fig. 1, and Fig. 5 is the 4th embodiment.
FIG. 6 is a plan view showing another embodiment, and FIG. 7 is a conventional configuration diagram. In the figure, (1) is the actuating member, (5) is the locking protrusion, and (6) (
16) is a locking member, (8) is a locking hole, (9) is an electromagnetic plunger, (10) is a movable rod, (10)' is a narrow diameter portion, (11) and (12) are a collar piece, ( 13) is a magnet, and (15) is an engagement groove. Figure 1 Figure 2 Figure 3 Figure 4 Figure 6

Claims (4)

[Claims] (1) A first position in which the actuating member is locked against its biasing force, and a lock in which the actuating member is released from the locked state in the process of moving from that position to the second position against the return spring. When the member is moved from the inoperative position to the activated position by energization, the movable rod that is slidably engaged with the locking member presses against the locking member, and the pressing action causes the locking to occur. A release mechanism for a locking device comprising an electromagnetic plunger that moves a member to a second position against the return spring, and a magnet that attracts a movable rod of the electromagnetic plunger to maintain its inoperative position. (2) A release mechanism for a locking device according to claim 1, wherein a collar is provided at the tip of the movable rod of the electromagnetic plunger, which attracts the magnet and presses the locking member. (3) The upper half of the movable rod of the electromagnetic plunger is provided with a narrow diameter portion extending in the axial direction, and the pressed portion of the locking member is slidably engaged with the narrow diameter portion. Release mechanism for the described locking device. (4) The locking device release mechanism according to claim 1, 2 or 3, wherein the polarity of the attracting surface of the magnet is equal to the polarity with which the movable rod is excited when the electromagnetic plunger is energized.