JPS5985524A - Lock mechanism of driving power transmitting device - Google Patents

Abstract

PURPOSE:To eliminate a big shaft of a driving member within a stage part of a member to be driven by making the member to be driven follow the driving member with an arc-shaped locus same as that of the driving member. CONSTITUTION:When an intermittent gear 31 engaged with a driving gear 30 is rotated, a power plate 38 is pressed by a cam 37 and shifted down. Then a driving member 3 interlocking the plate 38 moves upward contrarily centering on a support shaft 1 with an arc-shaped locus. Accordingly a member 4 to be driven is pulled by the member 3 since the member 3 engages a stage part 4a. In this case, the member 4 is supported by a guide member 5 and shifted with an arc- shaped locus since a rubbing part 4c with the member 5 has an arc-shaped form. As a result, the part 4a also draws an arc-shpaed locus in accordance with the locus of the member 3. Thus the member 3 never moves within the part 4a.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an engagement between a driving member that moves along an arcuate trajectory and a driven member that is pulled by the driving member and moves approximately linearly. This relates to a locking mechanism for maintaining the state. For example, when operating a tape player's loading mechanism, head crimping machine 1/+5, etc. using a drive source such as a motor, the link on the drive source side and the traction It relates to a locking mechanism used to maintain an engaged state with a member such as a []-ding mechanism.

[Technical progress in inventions] Recently, automation of tape players has progressed, and it has become possible to automatically load the paper sheet and manipulate the tape players.
tfS has been proposed. This 71--1 ~ loading mechanism, when the cassette is inserted into the back guide,
When the power switch is turned on, the cassette is set in the playing position on the reel base using the driving force of the motor, and then the head is moved forward to press the tape against the tape. When this cassette is installed, a spring is stored with the driving force of the motor, and when an eject operation is performed, the stored spring force is released to move the head back from the tape, and then The cassette is taken out from the playing position to the outside of the tape player 17.

Compared to conventional manual loading mechanisms, tape players equipped with such an A-loading mechanism use the driving force of the motor to store the springs for head retraction and ejection. , the advantage is that the attachment operation of the horn can be done with extremely light force.

Incidentally, in this type of tape player, it is necessary to transmit driving force from a motor serving as a driving source to various mechanisms on the driven side such as a loading mechanism.

In this case, the rotational force of the motor is generally converted into linear motion using a cam, but it is fine as long as the motor and the driven mechanism are close to each other. The linear motion generated by the motor is transmitted to the driven mechanism located away from the motor using a link.

Figure 1 shows a conventional example of such a drive force transmission decoy.
One arm 2a side is connected to a member on the drive source side that is driven by a motor and moves linearly. At the tip of the other arm 21 of the link 2, a driving member 3 having a [1-L shape] is provided, and this is l1li! The driven member 1 is engaged with the stepped portion /la of the driven member 1 extending in a direction substantially orthogonal to the driven member 2b. The driven member 4 is connected to driven mechanisms such as a loading mechanism and a head pressure mechanism at the end opposite to the stepped portion 4a, and each mechanism is operated by the reciprocating motion of the driven member 4. It is b. In addition, the driven member 4 (stepped portion 4a
A roller-shaped guide member 5 is provided on the back side of the drive member 4 and is held between the guide member 5 on the side of the driven member 4I and the drive member 3 of the link 2.

In such a conventional drive saw transmission device, when the link 2 rotates in response to the driving force of the motor, the drive member 3 moves in an arc shape, and the driven member 3, which is engaged with this at the stepped portion 4a, moves in an arc shape. The member 4 is pulled along its length. Here, since the driven member 4 is supported by the guide member 5 from the back side of the stepped portion 4a, even if the driving member 3 moves in an arc shape, the driven member 4 escapes to the support shaft 1 side of the link 2. Without this, the stepped portion 4a and the driving member 3 are in a locked state and move substantially linearly.

[Problems with contralateral technology] However, in the above-mentioned device, since the sliding portion between the driven member 4 and the guide member 5 is linear, the driving member 3 that draws an arcuate trajectory has a stepped portion. It will reciprocate within 4a. For this reason, a large piece with a long contact area with the driving member 3 is required as the stepped part 4a, and a wide one is required as the driven member 4 to be used as the stepped part 4a.
Tape Play - 7 This is one of the reasons that prevents miniaturization of parts. Furthermore, the fact that the driving member 3 reciprocates within the stepped portion 4a means that
The frictional resistance when the driving member 3 slides with the stepped portion 4a is correspondingly large, and the driving force cannot be transmitted smoothly.
A roller must be used as the drive member 3 (there arises the inconvenience that it must roll).

[Object of the Invention] The present invention was proposed to solve the problems in the conventional driving force transmission device as described above, and its purpose is to:
To provide a downsized driving force transmission mechanism that has less surrounding resistance between a step part provided on a driving member and a driven member, and also requires a smaller width of the step part. It is in.

[Summary of the Invention] The locking mechanism of the present invention has an arcuate shape of the sliding contact portion with the guide member that pulls into the driven member, which follows the trajectory of the driving member. When it moves, it is guided by the guide member so that it draws an arcuate trajectory, thereby eliminating the deviation of the trajectory between the driving member and the stepped portion of the driven member, so that the stepped portion can follow the driving member. This is b, which locks both of them.

[Embodiments of the Invention] Hereinafter, embodiments in which the locking mechanism 1 of the present invention is applied to a loading head crimping mechanism of a tape player will be described with reference to the drawings.

■ Locking mechanism...Figures 3 to 6 In this embodiment, the stepped portion 4a formed on the driven member 4 has a radius of the driving member 3, for example, with a dimension γ to the extent that the engaged driving member 3 does not come off. It is larger than the diameter and slightly narrower in width than the diameter. The edge on the tip side of this stepped portion 4a is
The link 20 has an arcuate relief portion 4b that follows the trajectory of the roller-shaped drive portion 3. On the other hand, the stepped portion 4 of the driven member 4
The edge opposite to a protrudes in an arc shape following the locus of the roller-shaped drive member 3, and this protruding portion serves as a sliding contact portion 4c with the roller-shaped guide member 5. Note that this driven member 4 is biased toward the opposite side (downward in the figure) from the driving member 3 by a spring 4d.

In this embodiment, the guide member 5 is provided on the plunger link 10''. This plunger link 1
0 is rotatably attached to the support @11 at the center of the arm, and the tip of one arm 1a is provided with a suction piece 13 for the Ill plunger 12, and this suction piece 13 A spring 14 is provided to pull and cover the electromagnetic plunger t. Note that this spring 14 has a weaker force than the spring 4d that pulls and covers the driven member 4 described above. Further, a self-holding switch SW2 of the electromagnetic plunger 12 is arranged near the plunger link j2.0, and the plunger link 1
0, this self-holding switch 5W2 (7) press piece 101
] is formed.

On the other hand, the arm 1°C on the opposite side of the plunger link 1o extends 15 to the holding plate 1 of the head pressure @ machine. 16 are formed. Inside this long hole 16,
A lock pin 18 of a head link 17 that interlocks with the head is inserted.

The head link 17 has a T-shape as a whole, and the lock bin 18 is provided at the tip of one vertical piece, and the head suppression bin 19 that interlocks with the head is provided at the tip of one horizontal piece. The head link 17 is urged clockwise about the support shaft 20 by a spring (not shown), that is, toward the rearward side of the head. Further, the head link 17 is connected to the pulling plate 21 at its [] link pin 18 portion. That is, the pulling plate 21 is connected to the end of the driven member 4 at one end, and the lock pin 10 of the head link 17 is inserted into the engagement hole 22 formed in the pulling plate 21 at the other end. .

- Drive mechanism...Fig. 7.8 The other arm of the L-shaped link 2 having the drive member 3 is connected to a drive mechanism that is intermittently driven by a motor. As this drive mechanism, one having the following configuration is used, for example.

This drive mechanism includes a drive gear 30 that is constantly rotated by the driving force of a motor, and an intermittent gear 31 is provided on the side of this drive gear 30.

This intermittent gear 31 has a notch 32 around which gear teeth are not formed, and when this notch 32 faces the drive gear 30, rotation from the drive gear 30 is prevented. If the missing part 32 is not transmitted and the position of the missing part 32 is shifted, the drive gear 30 drives it one rotation again to the position of the notch part 32. A recess 33 is stepped on the lower surface of the intermittent gear 31 in accordance with the position of the notch 32 . Then, the intermittent gear 31
The tips of the collars 34 are engaged on the sides of the connectors. This stopper 34 is biased by a spring 35 so that its tip always enters into the four parts 33. When inserting the cassette and operating the return lever from the stop state, the recess 33
It deviates from the

A switch pressing piece 36 is provided in the switch 1 to the collar 34, which protrudes apart from the engaging part of the intermittent 1'' 131 to the recess 33.
is set up (), and this is near S1~B3/'I (Jj
It faces the power supply switch SW1 of the motor and suction plunger i'- provided in the. This switch pressing piece 36 is configured such that when the switch bar 31 is engaged in the recess 33 of the intermittent 1 () 31, pressing the fti ilG! , when the spring 34 rotates counterclockwise and comes out of the recess 33, the power-on switch SW1 is pressed to turn on.The power-on switch SW1 is
It is electrically connected in parallel with the self-holding switch SW2.

On the surface of the intermittent gear A731, there is a drive nozzle 37 consisting of a drive part that expands in a spiral shape from the center, and a return part that is approximately straight line connecting the maximum diameter part and the minimum diameter part of the drive part.
are integrated. On the other side of this drive cam 37, a power plate 38 is arranged so as to be able to freely reciprocate.
A roller-shaped cam bore 39 provided on the lower surface of the power plays 1 to 38 is in contact with the outer periphery of the drive cam 37.

The position of the cam follower 39 is set so that it is located approximately at the center of the linear return portion of the drive cam 37 when the intermittent gear 31 is locked by the stopper 34. Further, the power plate 38 is pressed upward in the figure by a spring (not shown).

A drive plate 1-41 is connected to the inner side of such a power plate 38 via an L-shaped link 40. The drive plays 1 to 41 are plate-shaped members τ extending in the width direction of the tape player, and are supported by the tape player so as to be movable in the longitudinal direction. The L-shaped link 2 having the roller-shaped drive member 3 is connected to the opposite end (right side) of the drive plate 41 .

(2) Operation Next, the operation of this embodiment having the above configuration will be explained.

■ Drive member stopped state...Figures 3 and 7 Since tape player A2 is in a power off state before the cassette is inserted,
The motor is stopped and the electromagnetic plunger 12 is not energized. At this time, the intermittent gear 31 of the drive mechanism moves to the stopper 3/
4, and the power plate 38 is stopped at a position where three of its cam bores touch approximately the center of the linear return portion of the drive cam 37. Therefore, this power play 1.38 and the L-shaped link 40. Drive play 1-/I
1 and the driving member 3 of the present invention, which is interlocked via the L-shaped link 2, is also stopped slightly closer to the tip end of the driven member 14 than the stepped portion 4a of the driven member 4.

At this time, the guide member 5 supporting the driven member 4 from behind
Since the plunger link 10 provided with each is not attracted to the electromagnetic plunger 12, it is movable to the side opposite to the stepped portion 4a, and the driven member 4 is moved by the guide member 5 and the driving member 3. It cannot be held. Therefore, the driven member 4 is pulled toward the rehead crimping mechanism by the spring 4d, and the driving member 3 is not locked with the stepped portion 4a, but comes into contact with the relief portion 4b formed on the tip side of the stepped portion 4a. are doing. As a result, the plunge 11 link 10 is connected to the spring 1
4 toward the electromagnetic plunger 12, it is pressed by the driven member 4 pulled by the spring 1d, and the electromagnetic plunger 12 is in the all-out position.

■ Start of locking operation...Fig. 4 When the stopper 34 of the intermittent gear X231 comes off as the current is inserted, the three cam followers of the power plate 38 pulled by the spring slide down the linear return portion of the drive cam 37. . At this time, the intermittent gear 731 rotates slightly due to the pressing force of the three cam followers, and the position of the notch 32 is shifted, so that the intermittent gear 1231 meshes with the drive gear 30. When the stopper 34 is disengaged from the intermittent gear 31, the pressing piece 36 of the stopper 371 presses the power-on switch SW1, the motor is supplied with power and starts rotating, and the electromagnetic plunger 12 is also excited. .

In accordance with this drawing operation of the power plate 38, the driving member 3 which is interlocked with the power plate 38 moves slightly toward the top end of the driven member 4 and enters into the stepped portion 4a. This driven member 4
becomes movable toward the driving member 3 side by the step part 4a,
The plunger link 10, which has been pressed by the driven part side 4, is pulled by the spring 1/1 and comes into contact with the electromagnetic plunger 12. Since the electromagnetic plunger 12 is energized by the closing switch, the plunge hair link 10 is fixed, and the guide member 5 provided thereon is also fixed. At the same time, the plunger link 10 is self-retained by its suppression R1011. 1° to suppress switch SW2. Traction operation of driven member...Figs. 5 and 8. When the intermittent gear 31 meshing with the drive gear 30 rotates, the power plate 38 is pressed by the cam 37. Move downward in the diagram. Then, the driving member 3 interlocked with this moves conversely, drawing an arcuate trajectory upward in the figure with the support shaft 1 as the center, and as a result, the driven member 4 moves between the driving member 3 and the stepped portion 4a.
Since they are in mesh with each other, the drive member 3 moves the drive member 3.

At this time, the driven member 4 moves while being supported by the guide member 5, but since the sliding contact portion 4C with the guide member 5 is formed in an arc shape, the driven member 4 also follows an arc-shaped trajectory. I will draw it. As a result, the stepped portion 4a also follows an arcuate trajectory that follows the trajectory of the driving member 3, and the driving member 3 does not move within the stepped portion 4a.

Such movement of the driven member 4 causes the pulling plate 21 to move, and being pulled by this pulling member 21, a loading mechanism or a head pressure bonding mechanism is activated. For example, the head crimping mechanism advances the head link 17 in the counterclockwise cutting direction to a position where the head link 17 is crimped all together by moving the pulling plate 21. Then, the head link 17 is connected to the lock bin 1.
8 engages with the stepped portion 16a of the holding plate 15, thereby holding the head in the forward position. Since the holding plate 15 is interlocked with the plunger link 1o, it holds the head link 17 while the electromagnetic plunger continues to be energized.

■ Driven member stopped state...Fig. 6 Intermittent gear vI is 1
When the drive gear 3o rotates, the power play 138 stops at a position where its cam photo 1a 39 is approximately at the center of the linear return portion of the cam 37. At this time, the stopper 3'l returns to its original position and the closing switch SW1 becomes A, but the power (6 flange V12 is the self-holding switch SW).
2 maintains the excited state, and the plunger link 1o
And its guide member 5 is still fixed (+4 position). Therefore, the drive member 3 which is interlocked with the power plate 38
However, when it stops at the front end of the cassette (the same position as before inserting the cassette),
The driving member 3 does not come off the stepped portion 4a, and the driven member 4 and the pulling plate interlocked therewith are in a position where they are pulled slightly in the -L direction in the figure.

■ Release state of the driven member...Fig. 3 When the electromagnetic off switch (not shown) installed in series with the self-holding switch SW2 stops the power supply to the electromagnetic plungers 1 to 12, the plunger link 10 simply releases the spring. It becomes a free state where it can only be towed by 14. Here, a spring 4d having a stronger force than this spring 14 is attached to the driven member 4.
, the driven member 4 moves toward the front side while pressing the plunger link 10 in a direction away from the electromagnetic plunger 12. At this time, since the guide member 5 escapes together with the free plunger link 10, the driving member 3 is removed from the stepped portion 4a, and the lock between the driven member 4 and the driving member 3 is released.

At the same time, the holding play 1 interlocks with the plunger link 10.
~ 15 is also pressed by the driven member 4 and moves, and the stepped portion 1
6a and the lock pin 18 of the head link 17 are disengaged, and the head link 17 is pulled by a spring (not shown) and rotates in the n1 direction.

As a result, the head pressing bottle 19 moves and retreats at J to a position away from l\rad tape.

Further, due to the rotation of the plunger link 10, the switch pressing piece 10b moves away from the self (Q Ni switch SW2) and turns it off, so that the electromagnetic off switch
Even after the electromagnetic plunger 12 is no longer energized and becomes ΔN, the electromagnetic plunger 12 is not energized and the next power-on switch S Vt
/ The tape player maintains a stopped state when there is a pressing operation of 1.

(3) Effects of the Embodiment As described above, in this embodiment, the driven member follows the driving member which draws an arcuate trajectory along a similar arcuate trajectory. This prevents the member from moving too much within the stepped portion.

Therefore, it is possible to narrow the width of the stepped portion, contributing to the downsizing of the tape player.In addition, the sliding resistance between the stepped portion and the drive member is less than 4f, and the driving force is transmitted smoothly. becomes. As a result, without necessarily using a roller-like driving member, it is possible to use a simple protruding member without imposing unnecessary load on other drive sources of the mower, and it is possible to use a simple protruding member. can be achieved.

Further, the guide member 5 supporting the driven member 4 is attached to the plunger 17 link 1 fixed by the electromagnetic plunger 12.
Since it is provided at 0J=, it is also possible to unlock the driven member 4 and the driving member 3 by turning the electromagnetic plunger 12 on and off.

Furthermore, the stop position of the driving member 3 is adjusted to the step portion 4 of the driven member 4.
By setting -b a little closer to the tip than a, when the electromagnetic plunger is de-energized, the driving member 3 can press the plunger link 10 via the driven member 4, causing the spring 14 to Even if the plunger link 10 is constantly pulled toward the electromagnetic plunger 1ν12, the plunger link 10 and the electromagnetic plunger 1/12 can be separated. As a result, the suction operation is performed by the spring 14.
Since the electromagnetic plunger 12 only needs to be used for suction, there is no need to use a suction-type large-capacity electromagnetic plunger 12, and a small-capacity one exclusively for suction can be used.

[Other Embodiments] The present invention can be used in general drive force transmission mechanisms in other devices other than the drive system of a tape player.

Further, the shape thereof is not limited to the illustrated embodiment; for example, in the case where the driven member and the driving member are always engaged, the guide member 5 may be fixed to the frame or the like. Become. Further, the start (stop) position of the driving member may be such that the driven member enters the stepped portion when it is closest to the user. That is, in the illustrated embodiment, the stopping position of the driving member is selected in order to separate the plunger link from the electromagnetic plunger, but if the driven member is always engaged with the driving member, such consideration is not necessary. Not necessary.

The illustrated embodiment uses a power plate that operates intermittently as a drive source, but it is also possible to move the drive member continuously by moving the drive member with vQ + power plate and constantly move the driven member back and forth. , the present invention is applicable. Furthermore, although a spring that acts in the opposite direction to the driving member is used for the return operation of the driven member, it is also possible to provide a pair of front and rear step portions on the driven member so that the driving member presses the driven member during return. can.

[Effects of the Invention] As described above, the present invention has a simple configuration in which the sliding part with the guide member formed on the driven member is shaped like an arc following the locus of the driving member. By narrowing the width of the stepped portion provided on the member, it is possible to reduce the size of the driven member and to reduce the sliding resistance between the driven member and the driving member.

[Brief explanation of the drawing]

1 and 2 are plan views showing an example of a conventional driving force transmission device, and FIGS. 3 to 6 are plan views showing an embodiment in which the lock mechanism of the present invention is utilized in a tape player. , FIG. 3 shows before locking starts, FIG. 4 shows when locking starts, FIG. 5 shows when the driven member is being towed, and FIG. 6 shows when the driven member is stopped. FIGS. 7 and 8 are plan views showing an example of a drive mechanism that moves a drive member, with FIG. 7 showing a stopped state and FIG. ε3 showing an operating state. SWl...Power on switch, SW2...Self-holding switch, 1...Spindle, 2...Link, 3...
- Engagement member, 4... Driven member, 4a... Step portion, 4
C...Circular sliding contact portion, 5...Guide member, 10...
・Plunge A・Link, 12...Electromagnetic plunger, 1
3... Adsorption piece, 14... Spring, 15... Holding plate, 17... Head link, 21... Pulling V plate, 30... Drive gear, 31... Intermittent gear, 34
...S1-Brim-1 37...Cam, 38...Power play 1~, /11...Drive plate. Figure 3 Figure 4 Figure 5

Claims (3)

[Claims] (1) A drive member that reciprocates in an arcuate trajectory;
A driven member is provided with a stepped portion that engages with the driving member, and on the opposite side of the driving member with the driven member in between, the driven member is in sliding contact with the driven member and together with the driving member in the stepped portion. 1. A locking mechanism for a driving force transmission device, characterized in that a guide member is provided for holding the driven member, and a sliding portion of the driven member that contacts the guide member is shaped like an arc following the locus of the drive portion H. (2) A locking mechanism for a driving force transmission device according to claim 1, wherein the guide member is provided on a plunge A link that is fixed by an electromagnetic plunger. (3) The driven member is biased by a spring in the opposite direction to the pulling direction of the driving member, the driving member reciprocates intermittently, and the stopping position is off the step of the driven member. 3. The locking mechanism for a driving force transmission device according to claim 2, wherein the locking mechanism is configured to press the plunger link in a direction that disengages the electromagnetic plunger from the electromagnetic plunger.