JPH0328746B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a locking mechanism for a tape player. For example, the drive force of a motor is used to perform program changes, cassette loading/ejection, head crimping operations, etc. This relates to a lock mechanism used in a tape player to disconnect each mechanism from the driving force of the motor and lock it in a stopped state.

[Technical background of the invention and its problems] Recently, tape players use the driving force of a motor to load and eject a cassette, move the head back and forth toward the tape, and move the pinch roller. The so-called auto-reverse system automatically plays and records back and forth in the forward and reverse directions without having to press or release the cassette from the capstan shaft or take out the cassette installed inside and turn it over. An auto program change type is used.

In such a tape player, for example, when considering a program change, the driving force of the motor is transmitted to the program change mechanism to perform the change operation, but after the operation is finished, during normal tape running, It is necessary to lock the transmission member so that the driving force of the constantly rotating motor is not transmitted to the program chain mechanism.

In addition, many of the recent automated tape players use the same motor as a drive source to selectively operate multiple mechanisms, and in such tape players, for example, the head Since it would be inconvenient to transmit the driving force of the motor to the crimping mechanism, a function is required to lock the members on the head crimping mechanism side and prevent the driving force of the motor from being transmitted. Therefore, between the motor as a drive source and each mechanism selectively and intermittently driven by the motor, there is a locked member on each mechanism side, and this locked member is stopped at a position away from the motor. It is essential to provide a locking mechanism consisting of a locking member for holding the locking member and a releasing member for moving the locking member to connect the locked member with the motor.

There are basically two types of locking mechanisms conventionally known as such, and their configurations and drawbacks are shown in Figs. This will be explained using types as an example.

That is, in each figure, an intermittent gear 1 is provided in close proximity to a driving gear 2 that is constantly meshing with the motor and rotating, and a part of the intermittent gear 1 has cutouts 3, 3 without gear teeth. It is formed. If the intermittent gear 1 is locked when the notches 3, 3 are in positions facing the gear 2 on the motor side, the driving force of the motor will not be transmitted. When the lock is released, the teeth of the intermittent gear mesh with the drive gear 2 on the motor side, and the intermittent gear 1 rotates to transmit the driving force of the motor to the program change and other mechanisms.

First conventional type...Figures 1 and 2 This lock mechanism has a structure in which the release member and the lock member are always interlocked, and the lock member is continuously released while the release member is being operated. It is.

The locking member 5 is normally biased in the direction of the intermittent gear 1 by a spring 6, and its tip is biased towards the intermittent gear 1.
It engages and locks the engaging pins 7, 7 provided on the holder. When the release member 4 moves downward in the figure and presses the lock member 5, the lock member 5 rotates in the opposite direction to the intermittent gear 1 against the spring 6 to release the lock of the intermittent gear 1. Furthermore, the release member 4
Since the release member 4 continues to press the lock member 5 while the lock member 4 moves downward and then returns upward to return to its original position, the intermittent gear 1 is unlocked during this period and continues to rotate.

The disadvantage of such a locking mechanism is that if the reciprocating speed of the release member is slow, it is necessary to immediately lock the intermittent gear to stop the transmission after transmitting the motor's driving force to other mechanisms via the intermittent gear. Sometimes, it is not possible to relock the intermittent gear in time. That is,
After the locking member 5 is released, the relocking is performed when the reciprocating movement of the releasing member 4 is completed, and during the time required for this reciprocating movement, the intermittent gear 1 rotates to drive the motor to other mechanisms. It will convey power. For this reason, this conventional type cannot be used when the driving force transmission by the intermittent gear 1 can be shorter than the time required for the reciprocating movement of the release member.

For example, if this conventional type is used in a program change mechanism, the program change operation is a one-way operation from the forward side to the reverse side or vice versa, and the operation time is short, so if it is constantly linked to the reciprocating movement of the release member. Inconveniences arise in that the program change is completed before the release member returns completely, and the program change operation is restarted.

Second Conventional Type...FIGS. 3 and 4 The second conventional lock mechanism compensates for the drawbacks of the conventional type described above and allows the lock to be relocked immediately after being unlocked.

This locking mechanism has a structure in which the lock is released as the release member 4 moves forward, but can be relocked if the release member 4 continues to move forward thereafter. That is, the lock member 5 is biased toward the intermittent gear 1 by a spring 6, and engages with the engagement pin 7 of the intermittent gear 1 to lock it. The release member 4 moves forward,
When the taper cam 8 of the lock member is pressed, the lock member 5 rotates in the opposite direction to the intermittent gear 1, and the intermittent gear 1 is unlocked. When the release member 4 moves further forward and passes the taper cam 8, the lock member 5 is not pressed, but rotates in the direction of the intermittent gear 1 by the force of the spring 6, and engages with the engagement pin 7 of the intermittent gear. Then, lock it again.

However, in the case of this lock mechanism, there is a drawback that as the reciprocating release member retreats upon return, the release member presses the tapered cam of the lock member and releases the lock again.

For this reason, while the release member passes through the taper cam 8 of the locking member and retreats, the intermittent gear rotates again. For example, when this conventional type is used in a program change mechanism, the same problem occurs as in the conventional type. However, once the program has been changed, the mechanism may start operating again.

As mentioned above, the conventional lock mechanism is
It is difficult to unlock a locked member for a short period of time using a release member that reciprocates over a certain period of time. This applies to all locked members for intermittently and selectively transmitting force to each mechanism of a tape player.

In particular, since the reciprocating movement of the release member is normally performed manually or by a power plate that is moved by the force of a cam using a motor, the time required for this cannot be shortened below a certain limit. Since there has recently been a demand for higher operating speeds for various mechanisms such as loading and ejecting, there has been a desire for a locking mechanism that can re-lock immediately after unlocking.

[Object of the Invention] The present invention has been made to solve the above-mentioned problems, and its purpose is to enable relocking immediately after unlocking the locked member, and to enable the lock to be relocked by the subsequent return operation of the unlocking member. To provide a locking mechanism in which a locked member is never unlocked.

[Summary of the Invention] The locking mechanism for a tape player of the present invention includes a locking member, a locked member, and a release member, and the locking member is further provided with an auxiliary member that interlocks with the locking member in only one direction. . Immediately after the release member starts operating, the lock member is moved via the auxiliary member to unlock the locked member, and when the release member is removed from the auxiliary member, both members return to their original positions and are locked. Even if the lock member is relocked and the release member contacts the auxiliary member again during its return movement, only the auxiliary member moves under the force of the release member, and there is no force acting on the lock member in the release direction. This is to continue locking the locked member without the transmission of force.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be specifically described based on the drawings.

In this embodiment, the locked member uses an intermittent gear as in the conventional type.

(1) Structure...FIGS. 5 to 7 Locked member In this embodiment, the intermittent gear 1 used as the locked member has two engaging pins 7, 7 in opposing directions. The engaging pins 7, 7 engage with a locking member 5, which will be described later, to lock the intermittent gear 1 every half rotation.

Lock member The lock member 5 is rotatably attached to the tape player board by a support shaft 10, and its tip is a locking portion 5a that can be engaged with the engaging pins 7, 7 of the intermittent gear 1. An auxiliary member 11 is attached to this locking member 5. This auxiliary member 11
is located at a position substantially overlapping with the lock member 5, and the support shaft 10 is inserted into a long hole 11a formed in the auxiliary member 11.

On the other hand, a pin 12 is provided at the end of the auxiliary member 11 opposite to the elongated hole 11a.
installed on. That is, the auxiliary member 11 can rotate together with the lock member 5 about the support shaft 10, and can also rotate relative to the lock member 5 about the pin 12.
Note that the lower end of the pin 12 is inserted into a long hole 13 in the tape player board. A torsion spring 14 is provided between the lock member 5 and the auxiliary member 11, and is biased so that the end of the auxiliary member 11 on the side opposite to the intermittent gear of the elongated hole 11a is pressed against the support shaft 10. There is. Further, a spring 6 is provided between the pin 12 and the board of the tape player, and the tip of the locking member 5 is always connected to the intermittent gear 2 until the pin 12 is pressed against the end of the elongated hole 13 on the intermittent gear side. It is designed to be biased in the direction of locking.

In addition to the elongated hole 11a, this auxiliary member 11 is provided with an engaging portion 11b and a pressed portion 11c, and the engaging portion 11b is brought to a position where it can be engaged with the releasing member when the releasing member moves forward, which will be described later. The auxiliary member 11 is urged by the torsion spring 14. On the other hand, the pressed portion 11c has a tapered shape that can be pressed by the release member when the release member retreats.

Release member The release member 4 is a pin-shaped member that moves back and forth in response to the pushing force of a power plate P that is reciprocated by a drive source such as a motor or a manual operating lever.
Before starting the forward movement, the engaging portion 11b of the auxiliary member 11
, and presses the engaging portion 11b at the start of forward movement, and presses the pressed portion 11 of the auxiliary member 11 at the time of backward movement.
c.

(2) Operation The operation of the lock mechanism of this embodiment configured as described above will be explained.

Before operation of the release member...FIG. 5 At this time, the driving force from the drive source is not transmitted to the release member, and the release member 4 is not moving forward.
The lock member 5 and the auxiliary member 11 are urged toward the intermittent gear 1 around the support shaft 10 by the spring 6, and the locking portion 5a at the tip of the lock member 5 engages with the engagement pin 7 of the intermittent gear 1. intermittent gear 1 is locked. Therefore, the pin-shaped release member 4
is engaged with the engaging portion 11b of the auxiliary member 11, and no unlocking operation is performed.

When the release member starts moving forward - when it completes moving forward...Fig. 6 When the driving force from the drive source is transmitted to the release member 4 via the power plate P, the release member 4 starts moving forward, and the previously engaged The engaging portion 11b of the auxiliary member 11 begins to be pressed. With this force, the auxiliary member 1
1 rotates in the direction of unlocking the intermittent gear 1. At this time, since the lock member 5 is connected to the pin 12 provided on the auxiliary member 11, it rotates together with the auxiliary member 11 about the support shaft 10. Then, the locking portion 5a of the locking member 5 separates from the engagement pin 7 of the intermittent gear 1 with which it has been engaged so far, and the lock is released. As a result, the intermittent gear 1 receives the rotational force from the drive gear 2 and operates the mechanism that has been locked until now.

As the release member 4 continues to move forward, the auxiliary member 11 further rotates and escapes, so the release member 4
1, and the auxiliary member 11 is no longer pressed. Therefore, the auxiliary member 11 and the locking member 5 connected thereto by the pin 12 are rotated about the support shaft 10 in the direction of locking the intermittent gear 1, which is the member to be locked, by the urging force of the spring 6. Engagement pin 7 of intermittent gear 1 and locking portion 5 of lock member 5
a is engaged and becomes a locked state.

When the release member retreats...Figure 7 In the above, the release member 4, which was moving forward,
Then start retreating. Eventually, the release member 4 that comes into contact with the pressed portion 11c of the auxiliary member 11 presses the pressed portion 11c clockwise along with the subsequent retreat movement. At this time, the pin 12 attached to the auxiliary member 11 is pressed against the release member side end of the long hole 13 in the tape player board by the spring 6, so the pin 12 is pressed against the pressed part 11c.
has a fixed shape. Therefore, the auxiliary member 11 rotates about the pin 12 in a direction away from the intermittent gear 1. On the other hand, the auxiliary member 11 is
Since the lock member 5 connected to the pin 12 receives a force that fixes it at the end inside the elongated hole 13, it does not move despite the rotation of the auxiliary member 11 and the lock member 5 is connected to the lock member 5. Locking part 5a at the tip of the member
remains engaged with the engagement pin 7 of the intermittent gear 1 and maintains a locked state. Then, when the release member 4 retreats further and passes the pressed portion 11c of the auxiliary member 11, the auxiliary member 11 rotates in the direction of the intermittent gear 1 due to the biasing force of the torsion spring 14 and returns to the same position. .

[Other Examples] Note that the present invention is not limited to the illustrated embodiment, and the following embodiments may also be adopted.

The release member 4 is not attached to the power plate, but is manually operated to move back and forth to perform the release operation.

The member to be locked is not limited to one that rotates like an intermittent gear, but may be another member that moves in a straight line or an arc. Further, the locking means may be not only an engagement between a locking member and a pin, but also an engagement between an engaging portion provided on a member to be locked and a locking member.

In order to allow the auxiliary member to move only in a certain direction relative to the locking member, the elongated hole of the auxiliary member was brought into contact with the spindle 10, but a claw was raised opposite to the engaging portion 11b of the auxiliary member, and this claw was locked. It may also engage the edges of the member.

Such a locking mechanism may be used to lock the program change mechanism during the tape player's play state, and may also be used to lock the program change mechanism during the tape player's play state.
It may also be used to lock the eject mechanism and fast forward/rewind mechanism.

[Effects of the Invention] As described above, according to the locking mechanism of the present invention, with the simple structure of urging the auxiliary member to the locking member, the locking member can be relocked immediately after releasing the lock of the locked member, and then the locking member can be relocked. Even during the return operation, the force is transmitted only to the auxiliary member, making it possible to continue to maintain the locked state of the locked member by the locking member. As a result, by using the locking mechanism of the present invention for locking each mechanism of a tape player, even slow movements of release members such as the power plate and operation lever can be quickly and easily performed.
Since the locking state can be re-locked after release, stable locking operation is possible, and this has the effect of providing a tape player with excellent operability.

[Brief explanation of the drawing]

1 to 4 show an embodiment of a conventional locking mechanism, with FIG. 1 showing a first conventional locking state;
FIG. 2 also shows the unlocked state, FIG. 3 shows the second conventional locking state, and FIG. 4 also shows the unlocked state. 5 to 7 are plan views showing one embodiment of the locking mechanism of the present invention. FIG. 5 is a state before the unlocking member advances in the locking mechanism of the present invention, FIG. 6 is a state in which the lock is released, and FIG. FIG. 7 shows a state in which the release member is in the middle of retraction. 1... Intermittent gear, 2... Drive gear, 3... Notch, 4
...Release member, 5...Lock member, 5a...Locking part, 6
... Spring, 7... Engagement pin, 8... Taper part,
DESCRIPTION OF SYMBOLS 10... Support shaft, 11a... Auxiliary member elongated hole, 11b... Engagement part, 11c... Pressed part, 12... Pin, 13... Elongated hole of tape player board, 14... Torsion spring.

Claims (1)

[Scope of Claims] 1. A locking device comprising a locked member, a locking member for locking the locked member, an auxiliary member attached to the locking member, and a release member for moving the auxiliary member in an unlocking direction, The locking member is urged against the locked member by a spring, and an auxiliary member is attached to the locking member so that it can move in the locking direction and interlockingly in the unlocking direction, and the auxiliary member has a release member. A spring is provided between the auxiliary member and the locking member to bias the auxiliary member in the unlocking direction to a position where the release member and the engaging portion of the auxiliary member engage. A locking mechanism for a tape player, characterized in that it is provided with a locking mechanism. 2. The locking mechanism for a tape player according to claim 1, wherein the member to be locked is an intermittent gear having teeth and notches around the periphery that mesh with the drive gear. 3. The locking mechanism for a tape player according to claim 2, wherein the release member is provided on a power plate that is reciprocated by a motor. 4. The tape player according to claim 2 or 3, wherein the means for locking the member to be locked by the locking member is based on engagement between the tip of the locking member and a pin provided on the member to be locked. Lock mechanism.