JPH0411250Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an arrangement structure of an autoloading mechanism for a cassette player that automatically carries a cassette pack into a playback position and automatically carries it out from the playback position when taking out a cassette pack.

BACKGROUND OF THE INVENTION This type of autoloading mechanism includes a system in which a motor for driving the tape is also used for loading, and a system in which a motor exclusively for loading is used.
However, the former method has the drawback that it is necessary to separate the drive system of the loading mechanism from the tape running system while the tape is running, and a clutch mechanism is required, making the structure complicated and hindering the downsizing of the apparatus. On the other hand, in the conventional method using a dedicated motor for loading, the motor is attached to the deck body, which requires many levers, etc., and requires a large space, which limits the ability to make it compact. Furthermore, it was difficult to unitize the loading mechanism.

Problems to be Solved by the Invention The present invention is an improvement on these conventional problems, and its purpose is to provide a compact loading mechanism arrangement structure that uses a dedicated motor for loading and has good assembly workability. It's about doing.

Means to solve the problem Generally, in an autoloading mechanism,
A space corresponding to the lowering and raising of the cassette pack is required, but the magnetic head is placed at a location opposite to the lowered position of the cassette pack. The height of the magnetic head, pinch rollers, etc. is approximately the same as the height of the cassette pack. Therefore, the upper part of the magnetic head storage area is an empty space. This idea was developed with a focus on this point.
The main parts of the loading mechanism are placed in that empty space.A support plate is attached to the top of the magnetic head storage area of the cassette player and is removably attached to the main chassis. A gear consisting of a reduction gear that reduces the rotational speed of the motor, a gear that meshes with the reduction gear, a guide groove that performs a cam action, and a first sector gear that meshes with the first sector gear in a predetermined section, A second fan-shaped insertion lever that rotates an insertion lever that slides a slider having a convex portion that engages with the reel hub hole of the cassette pack along a slider guiding opening provided in the elevator holder and the elevator supported by the holder. A main part of an autoloading mechanism is mounted, which includes a gear and a seesaw lever that has a pin loosely inserted into the guide groove and lowers and raises the elevator holder.

Operation When the cassette pack is inserted into the elevator to a predetermined position, the autoloading motor starts rotating, the insertion lever is rotated by the meshing of the first sector gear and the second sector gear, and the cassette pack is inserted by the slider. is drawn in. When the cassette pack is retracted to a predetermined position, the first sector gear and the second sector gear are disengaged and the retraction operation is stopped. During this time, the pin of the seesaw lever passes through the horizontal portion of the guide groove, so the elevator does not move in the vertical direction. When the cassette pack is pulled into a predetermined position, the pin of the seesaw lever moves to the inclined part of the guide groove, and the seesaw lever rotates due to the cam action, and the elevator holder is tilted toward the main chassis, causing the elevator to descend. go. When the elevator descends to a predetermined position, the loading motor is stopped. Raising and discharging the cassette pack are performed in the opposite manner to the above-mentioned operations.

Embodiment Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a side view of the right main part, Fig. 3 is a front view of the main part, and Figs. 4 and 5 are left side views of the main part. .

In each figure, 1 is a main chassis, and a tape running mechanism and an autoloading mechanism according to the present invention are incorporated into this main chassis 1. Reference numeral 2 denotes a support plate on which the main parts of the autoloading mechanism are mounted, and is detachably attached to a post 28 erected on the main chassis 1 with screws or the like. The loading motor 3 is shallowly fitted into a motor positioning opening 2g provided in the horizontal portion of the support plate 2, and is fixed with a holder 12. A worm 4 is attached to the shaft of the motor 3, and a worm wheel 5b at the lower stage of the two-stage gear 5 is rotatably inserted into a post 2c erected on the horizontal part of the support plate 2.
mesh with. The upper stage of the two-stage gear 5 is a spur gear 5a, which meshes with the lower spur gear 6b of the two-stage gear 6, which is rotatably mounted on a post 2d erected on the support plate 2. The upper spur gear 6a of the two-stage gear 6 has more teeth than the lower spur gear 6b, and meshes with the spur gear 7b of the gear 7, which is rotatably inserted into a post 2e erected on the horizontal part of the support plate 2. . The rotation of the motor shaft is sufficiently reduced by the two-stage gears 5 and 6.

As shown in the plan view of FIG. 6 and the cross-sectional view of FIG. Guide groove 7 that acts as a cam underneath
It has a structure in which c is formed. The extent of the sector gear 7a is about 110° from the shaft center. Further, as shown in FIG. 8, which shows the side surface of the gear 7 developed, the guide groove 7c is formed such that a region 70 of approximately half of the side surface including the lower part of the sector gear 7a is horizontal to the gear plane, and is located near the end surface of the sector gear 7a. A region 71 of a predetermined length is inclined toward the upper surface of the gear 7, and a region 72 is machined horizontally again. The step length between the two horizontal regions 70 and 72 defines the descending length of the elevator 18. In addition, in Fig. 6 and Fig. 7,
7d is an oil-free metal for smooth rotation with the post 2e.

In a predetermined section, the sector gear 7a meshes with a sector gear 9 rotatably attached to a post 2f erected on a horizontal portion of the support plate 2, and is disengaged outside the predetermined section. The sector gear 9 has one end locked with a pin 9a between the upper surface of the insertion lever 8 rotatably mounted on the post 2f and the lower surface coupled thereto, and the other end connected to the end of the lower surface of the insertion lever 8. The sector gear 9 and the insertion lever 8 are inserted through a coiled spring 10 that is locked by a return portion provided in the insertion lever 8, and the sector gear 9 and the insertion lever 8 rotate together. However, if the movement of the insertion lever 8 is stopped for some reason while the fan gear 9 is rotating counterclockwise, the fan gear 9 will stop moving due to the coil spring 10.
Only it rotates counterclockwise against the force of.

Further, a pin 16a at an end of a seesaw lever 16 rotatably attached to a pin 2a at a vertical portion of the support plate 2 is loosely inserted into the guide groove 7c of the gear 7. As described above, the guide groove 7c of the gear 7 has a horizontal part and an inclined part, so the pin 16a changes its vertical position according to the rotational position of the gear 7, and rotates the seesaw lever 16 about the pin 2a. let A pin 16b provided at the other end of the seesaw lever 16 is loosely inserted into a hole 17f provided in the right side plate of the elevator holder 17.

A holder 11 is also screwed to the support plate 2, and a pack insertion detection switch 13 is fixed onto the holder 11. The two contacts 13a and 13b of this switch 13 are arranged at positions facing the lower end of the insertion lever 8, and when the ejection of the cassette pack is completed, the lower end is the contact point 1.
3a, the contacts 13a and 13b are closed. These contacts 13a, 13b open when the insertion lever 8 is slightly rotated clockwise.

The mechanisms (main parts of the loading mechanism) mounted on the support plate 2, such as the motor 3, two-stage gears 5, 6, gear 7, and insertion lever 8, can be connected to the support plate 2 by attaching and detaching the support plate 2 from the main chassis 1. It is possible to remove them together. That is, the main parts of the loading mechanism are unitized.

The elevator holder 17 holds an elevator 18 into which a cassette pack is inserted and moves the cassette pack in the vertical direction. Supported for free movement. The elevator 18 has a substantially U-shaped cross section, and the distance between the top and bottom surfaces is set to be slightly larger than the thickness of the cassette pack. In this elevator 18, the folded part 18d is inserted into the hole 17c of the elevator holder 17, the folded part 18c is inserted into the notch 17b of the elevator holder, and the folded parts 18e and 18f are engaged with the projections on the front surface of the elevator holder 17. Therefore, it is held in the elevator holder 17. Also, main chassis 1
A holder 21 is attached to the guide hole 21a.
When the pin 18g of the elevator 18 is loosely inserted and the elevator holder 17 is rotated toward the main chassis 1, the elevator 18 is rotated.
It moves in the vertical direction guided by the pin 18g and the guide hole 21a. When the elevator 18 is at the top end, it is held horizontally by the upper surface of the holder 21, and when it is at the bottom end, it is held horizontally by the main chassis 1 or the inserted cassette pack. Note that when the elevator 18 descends to the lowest end, the switch operating section 17h provided at the rear of the elevator holder 17 closes the contacts 24a, 24 of the loading completion detection switch 24.
Close b.

Slider guiding holes 17a and 18a are provided on the upper surfaces of the elevator holder 17 and the elevator 18, into which the locking portion 22b of the slider 22 made by insert molding is fitted, and the slider 2
2 is guided by slider guide holes 17a and 18a and is movable. The tip of the slider 22 is provided with an inclined convex portion 22a, and since the slider 22 is made of a flexible material, the cassette pack can be inserted with the elevator 18 positioned at the uppermost end. Then, the convex portion 22a
engages with the hole in the reel hub of the cassette pack.
Furthermore, as shown in FIG. 5, when the elevator 18 is at the lowest position, the slider 22 moves to the rearmost position and the convex portion 22a is separated from the cassette pack surface, thereby preventing the rotation of the reel hub of the cassette pack from being obstructed. There isn't. There is a pack contact plate 22c at the rear of the slider, and the cassette pack is attached to this plate 22c.
It is pushed by 2c and ejected. The pin 22d provided on the slider 22 is connected to the guide hole 8 of the insertion lever 8.
It is loosely inserted into a. The movement of the insertion lever 8 is transmitted to the slider 22 via this pin 22d. Further, a reversing spring 23 is provided, one end of which is engaged with the pin 17e of the elevator holder 17, and the other end of which is engaged with a recessed portion on the top surface of the slider 22, and when the slider 22 is located at the most forward position, a force that pushes the slider 22 further forward is provided. is applied to the slider 22, and when the slider 22 is located at the rearmost position, a force is applied to the slider 22 to push it further backward. Leaf spring 20 fixed on elevator holder 17 by pin 17d
has an end 20a bent downward and is inserted into an opening 18b provided on the top surface of the elevator 18. This leaf spring 20 serves to hold down the cassette pack when the elevator 18 descends.

The cassette pack is inserted between the upper and lower surfaces of the elevator 18 from the direction of arrow A in FIG.
It is discharged in the direction of arrow B in the figure. elevator 1
The reason why the bent portion 18h is provided at the front end of the cassette pack 8 is to enlarge the pack insertion hole 18i to facilitate insertion and ejection of the cassette pack. When the cassette pack is lowered, the hole in the reel hub of the pack is inserted into the hub drive shaft 27, the guide post 26 is inserted into the reference hole of the pack, and the capstan 25 is inserted into the capstan insertion hole of the pack. A magnetic head (not shown) or magnetic head is connected to the plunger 1.
A link mechanism etc. for moving the tape drive motor 15 to a recording position etc. by 4 is housed in a space 29 between the main chassis 1 and the support plate 2, and a mechanism for transmitting the rotation of the tape running motor 15 to the capstan etc. It is stored at the bottom.

FIG. 9 is a block diagram showing the electrical configuration of the embodiment of the present invention, in which 13 is a pack insertion detection switch, 24 is a loading completion detection switch, 3
0 is an eject switch, 31 is a control circuit, 32
3 is a motor drive circuit, and 3 is a loading motor. The control circuit 31 sends a signal for rotating the motor 3 in the first direction to the motor drive circuit 32 when the switch 13 is turned off, and stops the rotation of the motor 3 when the switch 24 is turned on.
In this state, when the eject switch 30 is turned on, the control circuit 31 sends a signal to the motor drive circuit 32 to rotate the motor in the second direction, and when the switch 24 is turned off, the motor rotation is stopped. make it stop.

FIG. 10 is a diagram showing the on/off states of the pack insertion detection switch 13, the loading completion detection switch 24, and the eject switch 30, and the rotational state including the rotational direction of the motor when the above embodiment is operated. The operation of the above embodiment will be explained below with reference to the same figure.

[Cassette pack insertion operation] Cassette pack retraction stage When the cassette pack is inserted into the pack insertion hole 18l of the elevator 18, the protrusion 22 of the slider 22
a fits into the hole in the reel hub at the front of the cassette pack, and the front end of the cassette pack abuts against the pack abutting plate 22c of the slider 22. In this state, if you push the cassette pack further in, the slider 22
moves, the insertion lever 8 is rotated clockwise by the pin 22d, and the switch 13 is turned off. When the switch 13 is turned off, the control circuit 30 causes the motor 3 to rotate in the first direction, the two-stage gear 5 to rotate counterclockwise, the two-stage gear 6 to rotate clockwise, and the gear 7 to rotate counterclockwise. Begin to. The gear 7 begins to rotate counterclockwise, and the sector gear 7a rotates to the sector gear 9.
When engaged, the sector gear 9 and the insertion lever 8 rotate clockwise, and the slider 22 moves rearward while drawing in the cassette pack. When the cassette pack reaches a predetermined position (the position where the hole in the reel hub of the cassette pack is directly above the hub drive shaft 27), the sector gears 7a and 9 are disengaged, and the slider 22 moves, ie, the cassette pack retracts. stops. Up to this state, the pin 16a of the seesaw lever 16 only horizontally moves the guide groove of the gear 7 from point a to point b as shown in FIG. 8, and the seesaw lever 16 does not move. remains at the top.

Lowering stage of the cassette pack Even after the sector gears 7a and 9 are disengaged, the gear 7 is rotated counterclockwise by the motor 3, and the pin 16a of the seesaw lever 16 is moved from the point b in FIG. 8 to the guide groove 7c. The object moves along the sloped area 71 toward point c. When the pin 16a moves on the slope of the guide groove 7c, the seesaw lever 16 moves against the pin 2.
The pin 16b is rotated around a, and the pin 16b moves toward the main chassis 1. For this reason, the elevator holder 17 connected at pin 16b is connected to pin 2b,
The elevator 18 begins to fall toward the main chassis 1 with the center 19a as the center, and the elevator 18 descends accordingly. When the elevator 18 descends to the lowest end, the switch operation section 1 of the elevator holder 17
Switch 24 for detecting loading completion at 7h
is turned on. The control circuit 31 detects that the switch 24 is turned on and stops the rotation of the motor 3.

[Cassette pack ejecting operation] Cassette pack rising stage When attempting to eject a cassette pack, the operator turns on the eject switch 30. The control circuit 31 controls the motor 3 when the switch 30 is turned on.
is rotated in the second direction. As a result, the two-stage gear 5 begins to rotate clockwise, the two-stage gear 6 begins to rotate counterclockwise, and the gear 7 begins to rotate clockwise. is moved from point c to point b. Therefore, the opposite operation is performed, and the pin 16b of the seesaw lever 16 is connected to the main chassis 1.
move away from the elevator holder 17.
, and the elevator 18 is raised. This upward movement of the elevator 18 is stopped when the pin 16a of the seesaw lever 16 reaches the horizontal surface of the guide groove 7c. In addition, the elevator holder 17
The loading completion detection switch 24 is turned off when the tilt starts to return to its original position, but the control circuit 3
1 ignores this.

Cassette pack discharging stage Even after the elevator 18 reaches the top end, the gear 7 continues to rotate clockwise by the motor 3. Therefore, the sector gear 7a and the sector gear 9, which have been separated until now, will mesh with each other, and as a result of this meshing, the sector gear 9 and the insertion lever 8 will begin to rotate counterclockwise, and the slider 22 will start rotating counterclockwise. The cassette pack is guided by the guide holes 17a, 18a and moved forward, and is pushed forward by the pack abutting plate 22c of the slider 22. When the sector gear 7a further rotates clockwise and the pack insertion detection switch 13 is turned on by the lower end of the insertion lever 8, the control circuit 30 controls the motor 3.
stop rotating. Therefore, the movements of the insertion lever 8, elevator holder 17, and elevator 18 are also stopped. In this state, the elevator 18 will be positioned at the top end.

According to the embodiments described above, the following effects can be obtained.

(1) Since the motor 3 dedicated to loading is used and the main parts of the loading mechanism are mounted on the support plate 2 and placed above the magnetic head storage area, the apparatus can be made more compact. Furthermore, since the loading mechanism is integrated, work efficiency during assembly is improved.

(2) Inserting and ejecting the cassette pack involves engaging the hole in the reel hub of the pack with the convex part of the slider 22, so compared to inserting and ejecting the cassette pack by engaging the end face of the cassette pack, it is more reliable and stable without applying force such as prying. The following operations are possible.

(3) Since the suction and discharge of the cassette pack are determined by the meshing of the sector gear 7a and the sector gear 9, the suction and discharge positions are less likely to go out of order. It is also more compact than a suction mechanism using a reversing spring action, as seen in conventional multiple-type cassette players.

(4) The lowering and raising of the cassette pack is controlled by the guide groove 7c of the gear 7 and the pin 16a of the seesaw lever 16.
The cassette pack is lowered and raised while always holding the elevator holder, so when the pack is inserted, the pack moves the slider lever and when the pack is inserted to a certain position, the elevator holder is rotated by the spring force. Compared to the conventional loading mechanism that moves the cassette pack and drops it, the noise caused by the impact of the machine when the cassette pack is lowered and raised is significantly reduced.
Further, the lowering and raising mechanisms are simplified and the number of parts is reduced.

Effects of the invention As explained above, according to the invention, the motor 3 dedicated to loading is used, and the main parts of the loading mechanism are mounted on the support plate 2 and placed above the magnetic head storage area. It is possible to make it more compact, and since the loading mechanism is integrated into a unit, work efficiency during assembly is also improved. Also,
Inserting and ejecting the cassette pack involves engaging the hole in the reel hub of the pack with the convex portion of the slider 22, so compared to inserting and ejecting the cassette pack by engaging the end face of the cassette pack, no force such as prying is applied, allowing for reliable and stable operation. It becomes possible.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a side view of the right main part, Fig. 3 is a front view of the main part, Figs. 4 and 5 are left side views of the main part, and Fig. 6 is a plan view of the gear 7, FIG. 7 is a sectional view taken along line X-X in FIG. 6, FIG. 8 is a side development view of the gear 7, and FIG. 9 is a block diagram showing the electrical configuration of the embodiment of the invention. 10 shows the switch 13 for detecting pack insertion and the switch 2 for detecting loading completion when the above embodiment is operated.
4. On/off state of the ejector switch 30;
FIG. 3 is a diagram showing the rotation state including the rotation direction of the motor. 1 is a main chassis, 2 is a support plate, 3 is a motor exclusively for loading, 4 is a worm, 5 and 6 are two-stage gears, 7 is a gear, 7a and 9 are sector gears, 7b is a spur gear, 7c is a guide groove, 8 is the insertion lever, 13
1 is a pack insertion detection switch, 15 is a tape running motor, 16 is a seesaw lever, 17 is an elevator holder, 18 is an elevator, and 22 is a slider.

Claims (1)

[Scope of utility model registration request] A support plate is detachably attached to the main chassis above the magnetic head storage area of the cassette player, and on the support plate is a dedicated autoloading motor and a reduction gear for reducing the rotation speed of the motor.
a gear that meshes with the reduction gear, a guide groove that acts as a cam, a first sector gear;
A slider having a convex portion that meshes with a sector gear in a predetermined section and engages with a reel hub hole of a cassette pack is slid along a slider guiding hole provided in an elevator holder and an elevator supported by the holder. A cassette player comprising: a second sector gear for rotating an insertion lever; and a seesaw lever having a pin loosely inserted in the guide groove and for lowering and raising the elevator holder. Arrangement structure of autoloading mechanism.