JPS626583Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the invention of a locking mechanism in a tape player, and aims to eliminate the locking state that is effective by turning off the power, both in the middle of operation and in the operation locking state, thereby ensuring the safety of the mechanism. At the same time, the present invention aims to provide a novel locking mechanism that can perform an appropriate function with a relatively simple structure.

In a tape player, it is necessary to lock each member disposed therein at each operating position, and various locking mechanisms for this purpose have been proposed and put into practical use. However, in such conventional devices, since the lock member is mechanically actuated to form the desired locking relationship, a special mechanism for releasing the locked state is provided, and this lock release operation mechanism is used. It is necessary to operate at specific timings related to loading/unloading or playing conditions of the tape pack, and the mechanism structure for this is generally quite complicated, and there are disadvantages in that accurate operation cannot always be achieved. However, if the timing of their operation is not properly obtained, the associated mechanisms may be damaged. In some cases, a suction plunger is used in the lock part as described above, but in this case, especially in a mechanism operated by mechanical operation, the power is turned off before the lock state is reached. If this happens, the device will stop in an intermediate state and no further operation will be possible until the power is turned on again.

The present invention has been devised to eliminate the disadvantages and shortcomings of the conventional ones as described above, and by forming the guide part and the lock part into a single part, it is possible to easily solve all the problems. By providing a mechanism that can release the power in the state of operation, the lock can be effectively released by turning off the power not only in the operation lock state but also in the state in the middle of operation, and the lock can be automatically activated with almost no resistance to the lock part. The locking member can be positioned, and the mechanism can be operated smoothly with sufficient safety with a relatively simple structure without putting any extra load on the hook or other parts. We succeeded in obtaining a mechanism that can be tightened.

That is, a specific embodiment of the present invention will be explained with reference to the attached drawings. The attached drawings show the above-mentioned present invention adopted for the purpose of locking a head plate in a tape player, and which is attached to a deck 20. Two flywheels 5, 5 each having a capstan 50 are disposed opposite each other, and a belt 15 driven by a pulley 22 of a motor 21 is wound around each of these flywheels 5, 5. The rotation of the flywheels 5, 5 is similar to conventionally known tape players of this type. However, a small gear 5a is provided coaxially with either one of the flywheels 5, 5 as described above, and an interlocking gear 6 separately provided on the deck 20 is engaged with the small gear 5a. Small gear part 6a coaxial with 6
Another rotary gear 4 is faced to.
A partial notch 4a is formed in a part of the circumferential gear portion of the rotating gear 4, and in the ejected state shown in FIG. 1, the small gear portion 6a described above is located in this partial notch 4a. Rotating gear 4
The engagement with the circumferential gear is disengaged. However, the rotary plate 40 is installed coaxially with the above-mentioned rotary gear 4, and on the circumferential side thereof, a locking portion 23 of a gear locking piece 2 and an actuating portion 3a of an interlocking piece 3, which will be described later, are arranged. A chordal notch 41 and an engagement notch step 43 are formed in the relationship shown in the figure in accordance with the relative position, and a head is provided on the top surface of the chord-like notch 41 to be slidable along the elongated hole 10d relative to the deck 20. A retainer 42 that engages and disengages from the locking piece 7 of the plate 10 is provided. The locking piece 7 is a mounting portion 1 formed at the back of the head plate 10.
As shown in the figure, it is rotatably attached to the retainer 4 by means of a pivot 10a.
A passive part 72 is provided on the lower surface of the distal end of the lock member 8 facing the rotation range of 2, and the passive part 72 has second to fourth parts on the other end side of the lock member 8, which has an adsorbent 83 provided at one end.
Guide portion 81 as revealed in the figure
and a lock portion 82 are provided. This lock member 8 is attached to a deck 20 coaxially with the interlocking gear 6 described above.
A suction plunger 9 is provided for the adsorption material 83, and when the suction plunger 9 is energized, the locking member 8 is fixed. It is something that can be converted into

In the illustrated example, a slide piece 1 is separately slidably attached to the inner part of the deck 20, and the above-mentioned gear locking piece 2 is attached to one end of the slide piece 1.
An engaging part 11 that engages with another engaging protrusion 24 is bent downward, and an operating part 12 is provided at the other end to adjust the tape end when inserting a tape pack or fast forwarding and rewinding. The first one is activated by the action of an electromagnetic plunger that is activated by a detection signal.
It is designed to function as shown by arrow a in the figure. The gear locking piece 2 and the interlocking piece 3 described above are superimposed and provided rotatably about the common pivot 30, but there is a gap between the gear locking piece 2, the interlocking piece 3, and the deck 20. are springs 29 and 39 respectively.
is provided to apply force to rotate the gear locking piece 2 counterclockwise in FIG. 1, and to apply an acting force to rotate the anti-interlocking piece 3 clockwise. As shown.

Further, in the above-described embodiment, the head plate 10 is slid by using the rotational operation of the rotary gear 4, but the locking mechanism according to the present invention is specified only in such a case. It is clear that there is no such thing, and even if the head plate 10 is used to lock the sliding operation of the head plate 10, the head plate 10 must be moved linearly forward and backward by an operating mechanism such as a rack and pinion. Even in such a case, the same configuration can be applied to the locking piece 7. Furthermore, the device according to the present invention can be applied to the cassette tape pack loading mechanism in power loading of this type of tape player, or can be linked to the head plate operated as in the above embodiment. It is also possible to operate the idler switching operation member and the like relative to the reel base.

To explain the operation of the embodiment of the present invention as described above, the slide piece 1 is moved by the action of an electromagnetic mechanism (not shown) in response to a tape end detection signal when loading a tape pack or fast forwarding and rewinding.
is slid as shown by arrow a in FIG. Rotate as shown by arrow b. That is, the first
In the ejected state as shown in the figure, the actuating portion 3a of the interlocking piece 3 acts on one end of the chord-shaped notch 41 of the rotary plate 40 by the restoring force of the spring 39, thus causing the rotary plate 40 and the rotary gear 4 to In Fig. 1, the force is applied so as to rotate clockwise, and such rotational force is applied by the engaging protrusion 23 of the gear locking piece 2 engaging the notch step 43, as shown in the figure. However, by rotating the gear locking piece 2 in the direction of arrow b as described above, the engagement between the locking protrusion 23 and the notch stepped portion 43 is prevented. Since the rotation gear 4 is released, the spring 3 as described above
9 and the rotational force of the interlocking piece 3, and therefore, the partial notch 4a that was facing the interlocking gear 6 in the ejected state is moved by the rotation of the rotating gear 4 as shown by the arrow c. small gear part 6a
and the rotating gear 4 can be engaged with each other.

On the other hand, as for the motor 21, it is generally known that when a tape pack is attached, the power switch is turned on and its rotation is obtained. , 5 are rotated, and therefore the interlocking gear 6 and its small gear portion 6a are driven via the small gear 5a provided on one of them. Due to such engagement, the rotary gear 4 is continuously rotated, and the retainer 42 provided on the rotary gear 4 acts on the inclined portion 71 of the locking piece 7 as shown in FIG.
That is, the locking piece acts as shown by the arrow e in FIG. (Therefore, the head plate 10) is fired 19
However, since the locking member 8 is suctioned and fixed to the suction plunger 9, only the pulling force according to the force component is obtained, and the head The plate 10 is pulled out and advanced in such a direction that its head is pressed against the tape of the attached tape pack.

If the power is cut off during the forward motion of the head plate 10 as described above, the head plate 10
, and the locking piece 7 also tries to move back, but since the power has been turned off, the rotating gear 4 and the rotating plate 40 are both in a stopped state, so the locking piece 42
is caught on the locking portion 71 and becomes locked, and the retreating force of the locking piece 7 is applied via the passive portion 72. The locking member 8, which has already turned off and has lost its suction force, is shown in phantom lines in FIG. As shown in FIG. 3, when the tip of the locking portion 71 overcomes the retainer 42, the spring 85 causes it to move back through the solid line state again.

In the embodiment described above, the forward movement of the head plate 10 is caused by the passive portion 72 of the locking piece 7 reaching the locking step 82 of the locking member 8 and the locking piece 7 rotating. Then, the state as shown in FIG.
2 engages with the locking step 82 to hold the head plate 10 in the playback position. After forming such a state, the rotary plate 40 further rotates, and the partial notch 4a of the rotary gear 4 as described above reaches the engagement position with the small gear portion 6a, as shown in FIG. In other words, the rotational force of the interlocking piece 3 of the rotary plate 40 is stopped in the state where the engaging part 23 and the step part 43 of the gear locking piece 2 are engaged with each other, and the gear is stopped in preparation for the next operation.

In addition, in the playback state formed as described above, when the tape player receives a fast forward rewind or eject operation, the power to the suction plunger 9 is turned off, so that the suction lock of the lock member 8 is The state is released and the locking piece 7
The locking member 8 rotates clockwise due to the force of the retracting force, and as shown in FIG. will move back together with the head plate 10. Such retraction of the head plate 10 is similarly obtained even when the entire power supply to the tape player is turned off.

As explained above, according to the present invention, the guide part 81 and the lock part 82 are connected to each other at the end of the lock member 8, and the suction plunger 9 is attached to the suction piece 83 provided on the lock member 8. By arranging it, the locking function by fixing the locking member 8 can be achieved with a relatively simple structure, and the locking function of the locking member 8 can also be achieved by the locking part 82 in a state where the power supply is turned off. This eliminates the need for a release operation mechanism as in conventional locking mechanisms, and since the guide portion 81 is formed to be connected to the lock portion 82 as described above, the locking piece 7 can easily slide. Formation of the lock state by the action and other actions can be performed smoothly with almost no resistance, and the lock mechanism does not work in the energized off state, so even if the energization is turned off during operation, the guide part can rotate. It has the functions and effects of automatically restoring the lockout state to the lockout state, thereby sufficiently ensuring the safety of the mechanism, and having a relatively simple overall configuration. It's a big idea.

[Brief explanation of the drawing]

The drawings show the technical content of the present invention; Fig. 1 is a plan view showing an example of a tape player using the mechanism of the present invention, and Figs. 2 to 4 show the operational relationship in stages. FIG. In these drawings, 1 is a slide piece, 2 is a gear locking piece, 3 is an interlocking piece, 4 is a rotating gear, 5 is a flywheel, 6 is an interlocking gear, 7 is a locking piece, 8 is a locking member, 9 is suction plunger, 1
0 is a head plate which is an operating member, 20 is a deck, 72
8 is a passive part, 81 is a guide part, 82 is a lock part, 8
Reference numeral 3 indicates a suction piece, and reference numeral 85 indicates a spring.

Claims (1)

[Scope of utility model registration request] An electromagnetic plunger 9 for fixing the lock member 8 is disposed on the lock member 8 formed by connecting the guide portion 81 and the lock portion 82, and the electromagnetic plunger 9 is provided to lock the guide portion 81 and the lock portion 82. The passive part 72 of the locking piece 7 provided so as to be swingable is made to face the member 10 to be held, and the locking part 42 of the rotary plate 40 driven by the motor is made to face the hook part 71 of the locking piece 7. A locking mechanism for a tape player, characterized in that the locking member 8 is fixed by energizing the electromagnetic plunger 9, and the locking member 8 is released from the fixed state by turning off the energization.