JPS6141153Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a cassette tape player of the type in which the cassette pack is inserted horizontally (with the exposed surface of the cassette tape on the back side), and the push-in operation stroke when the cassette pack is ejected. This invention relates to a back ejecting mechanism for a cassette tape player, which separates the magnetic head retracting process and the cassette pack ejecting process to reduce the eject operation force and improve the eject feeling.

Conventional cassette tape players that have a mechanism that presses a single magnetic head or a mechanism loaded with a magnetic head toward the cassette tape using a spring or the like to bring the magnetic head into close contact with the cassette tape during playback do not release the magnetic head during the eject operation. At the same time as you move the head back and away from the cassette pack,
Alternatively, the cassette pack was ejected as part of the process of separating the magnetic head from the cassette pack. Therefore, the load of the magnetic head retraction operation and the load of the cassette bag ejection operation are simultaneously applied to the push operation lever, resulting in a drawback that the eject operation force becomes large.

Therefore, in the first half of the eject operation, the magnetic head is only moved backward, thereby reducing the eject operation force. It was something that was shown to me.

The cassette tape player shown in both of these publications is of the type in which the cassette bag is inserted vertically (usually with the exposed side of the cassette tape on the right side), and is mounted on an eject operating lever or on a stand loaded with a magnetic head. A pin is provided on one side, and a substantially dogleg-shaped deformed hole is provided on the other side into which the pin is inserted, and by pushing the eject operation lever in the first half of the eject operation, the pedestal can be opened at one end on the back side. The frame is rotated about the center, and in the second half of the eject operation, the pin and the deformed hole engage to hold the frame separated from the cassette bag.

However, in these configurations, the pin or deformation hole is provided directly on the eject operation lever or the pedestal, so when the pedestal position is held by the engagement between the pin and the deformation hole, the force that causes the pedestal to return to its original state is reduced. Since the ejector operates in the opposite direction to the direction in which the ejector operation lever is pushed, the reduction of the ejector operation force is still incomplete.

This is a more serious problem in a cassette player in which the cassette pack is inserted horizontally, because the pedestal carrying the magnetic head must be moved in the direction in which the push operation lever is pushed in during the eject operation.

The present invention aims to solve these drawbacks by locking the magnetic head in a cassette player of the type in which the cassette pack is inserted horizontally at the minimum distance required for ejecting the cassette pack during the eject operation. To provide a pack ejecting mechanism for a cassette tape player, which reduces the eject operation force and improves the operating feel by relieving the load of the head backward movement at that position and then only performing the cassette pack ejecting operation. It is an object.

Hereinafter, the present invention will be described in detail with reference to the drawings. 1 to 3 are different state diagrams showing an embodiment of the present invention, in each figure, a is a plan view, b is a side view, and c is an enlarged plan (perspective) view of the main parts.
In these figures, 1 is an eject operating lever, 2 is a stand (head stand) on which the magnetic head 7 is mounted, and 3 is a fulcrum (for example, caulking) 3 on the head stand 2.
4 is a chassis, 5 is a loading lever, and 6 is a lever for retracting the head rotatably pivoted by a.
8 is a cassette pack, and 8 is a cassette pack holder. The head stand 2 and the operating lever 1 are supported slidably in the directions of arrows A and B on the front and back sides of the chassis 4, respectively. A deformed hole 9 with two sides 9a and 9b shaped like a dogleg is provided in front of the chassis 4 in the direction of movement (arrow B) of the operating lever 1. Matches the sliding direction. Head retraction lever 3 whose base end is supported by a fulcrum 3a
A pin 10 passing through the deformed hole 9 is provided on the front surface of the free end side of the
has been erected. The operating lever 1 and head stand 2 are always pressed forward, that is, in the direction of arrow A, by different springs (not shown). The loading lever 5 is a holder 8 that houses a cassette pack 6.
It is a substantially V-shaped lever that raises the
is rotatably connected to the holder 8, and the bent portion 5
b is pivotally fixed to a side wall portion 4a formed by cutting and raising the chassis 4. Between the other ends of the pair of levers 5 and 5 is a bar 1
1. When this bar 11 is pushed a predetermined stroke in the direction of arrow B of the operating lever 1,
It is pressed by the bent portion 1b provided at the lower end of the center.

The operation of the pack discharging mechanism configured as described above will be explained in order. FIG. 1 shows the playing state, in which the head stand 2 moves forward in the direction of arrow A due to its elastic action, and the magnetic head 7 is in close contact with the tape in the cassette pack 6. The pin 10 provided on the free end side of the head retraction lever 3 is guided to the forefront of one side 9a of the deformed hole 9, and prevents the head stand 2 from moving forward at this position. At this time, the pin 10 is connected to the operating lever 1.
It is in contact with the inclined tip portion 1a of the.

FIG. 2 shows the head in a retracted state. When the operating lever 1 is pushed halfway in the direction of arrow B from the state shown in FIG.
0 is pressed in the direction of arrow B, the head stand 2 moves back in the direction of arrow B against the elastic action. When the pin 10 passes over the bent part of the deformed hole 9, the pressing force from the inclined tip 1a of the operating lever 1 pushes it toward the other side 9b, that is, toward the direction of movement of the operating lever 1.
Since the head moves away in the intersecting direction C within the range of 90 degrees, the head retraction lever 3 rotates around the fulcrum 3a. As a result, the head stand 2 is retracted to a position where the magnetic head 7 is separated from the tape in the cassette pack 6 by a predetermined distance. This state remains unchanged as long as the operating lever 1 is located on the side of the pin 10. Therefore, the head stand 2 is stopped (locked) at this position.

FIG. 3 is a diagram showing the pack ejection state. Second
When the operating lever 1 is further pushed in the direction of arrow B from the state shown in the figure, the pin 10 completely escapes to the side of the operating lever 1 within the other side 9b of the deformed hole 9. Then, the bent portion 1b at the lower end of the operating lever 1 abuts against the bar 11,
Push the bar in the direction of arrow B. When the bar 11 is pressed in the direction of arrow B, the loading lever 5 rotates counterclockwise in FIG. Then, when the operating lever 1 moves forward by a predetermined stroke in the direction of arrow B, the lever is locked. As a result, the operating lever 1, head stand 2, and loading lever 5 are held in the non-playing state as shown in FIG. 3. At this time, the cassette pack 6 is ejected from the raised holder 8 in the direction of arrow A.

An example of the locking mechanism described above is shown in FIG. 4. A hole 5c is formed in one side of the loading lever 5, and one end 12b of a link lever 12 having a fulcrum 12a is loosely fitted into the hole 5c. There is.
The other end of this link lever 12 is a U-shaped groove 12c, and an engagement lever 13 is formed in this U-shaped groove 12c.
A pin 13a implanted in is slidably fitted. The engagement lever 13 is rotatable about a fulcrum 13b, and has an engagement portion 13c with a notch at the other end. On the other hand, the operating lever 1 is provided with an engagement protrusion 1c which is partially cut and raised. On the other hand, the pin 5a of the loading lever 5 (connected to the holder 8 described above) is connected to the guide groove 1 of the cam lever 14.
4a, and this cam lever 14
is the shaft 14b according to the movement of the loading lever 5.
It is subjected to an elastic force so that it can rotate in the direction of arrow H around . An eject bar 15 is fixed between a pair of cam levers 14, 14, and this pushes the front end surface of the cassette pack 6 to eject it.

FIG. 4 shows the playing state shown in FIG. 1, in which the operating lever 1 has been retracted to its initial position, and the ejector bar 15 has been retracted by the pushing operation of the cassette pack 6. Therefore, the cam lever 14 is rotationally deflected in the direction of the arrow. In this state, when the operating lever 1 is pushed in the direction of the arrow B, the bent portion 1b at the lower end of the operating lever 1 presses the bar 11, so that the loading lever 5 is rotated in the direction of the arrow G. The link lever 12 is linked to the operation of the loading lever 5.
Since the U-shaped groove 12c rotates in the direction of arrow H, the engaging portion 13c of the engagement lever 13 rotates in the direction of arrow R. Then, when the operating lever 1 is pushed in the full stroke in the direction of the arrow B, the pin 5 of the loading lever 5
The loading lever 5 and the cam lever 14 rotate in the directions of arrows T and H, respectively, until the lever a reaches the upper end side of the guide groove 14a. At this point, the eject bar 15 has also rotated a predetermined distance in the direction of the arrow H, and the cassette pack 6 is thereby ejected. The states of the loading lever 5 and the cam lever 14 are then maintained. At the same time, the upper protrusion 1c of the operating lever 1 has entered beyond the engaging portion 13c of the engaging lever 13, so when the pressing force on the operating lever 1 is removed, the operating lever 1 is released by a spring (not shown). Under the force of retraction due to elasticity, the protrusion 1c engages the engagement portion 13c of the engagement lever 13.
engage with. Therefore, the operating lever 1 is locked at the pushed-in position at the time of ejection.

By inserting the cassette pack 6 and rotating the eject bar 15 in the direction of the arrow, the operating lever 1, which is locked in the pushed position at the time of ejection, can be moved to the cam lever 14, loading lever 5, link lever 12, and engagement lever 13. are the fourth
As a result of returning to the initial position shown in the figure, the engagement portion 13c of the engagement lever 13 and the protrusion 1c of the operating lever 1 are disengaged and retreated to the initial position by the elastic force of a spring (not shown). Therefore, each of the above locked states can be released with a single touch by inserting the cassette without requiring a separate push button or the like for releasing the lock.

In the pack discharging mechanism of the present invention described above, the pushing operation stroke of the operating lever 1 is changed during the head retraction process from the playing state shown in FIG. 1 to the head retracted state shown in FIG. 2, and from the state shown in FIG. It is separated into the pack ejection process that moves to the pack ejection state. Therefore, if the pushing load in the head retraction process is _L1 , and the pushing load in the pack ejecting process is _L2 , the operating force in the direction of arrow B of the operating lever 1 only needs to correspond to _L1 in the first half, and The second half is L ₂
This means that the load only needs to be borne by the operator's fingers, which is much lighter than the conventional maximum load (L ₁ +L ₂ ).

FIG. 5 is a plan view (perspective) of main parts showing another embodiment of the present invention. In this embodiment, a pair of dogleg-shaped deformed holes 9, 9' are symmetrically provided in the chassis 4, and a pair of head retraction levers 3, 3' are provided in the head stand 2 so as to be freely rotatable around fulcrums 3a, 3a'. Support,
Furthermore, a pin 1 is installed on the lower surface of the free end of the levers 3, 3.
0 and 10' are fitted into the deformed holes 9 and 9', respectively. On the other hand, the tip portion 1a of the operating lever 1 is inclined symmetrically to both sides. In the pack discharging mechanism having such a symmetrical structure, since the operating lever 1 receives equal force from the pins 10 and 10', it does not shift to one side only, and has the advantage that the pushing operation becomes smooth.

FIG. 6 is a plan view (perspective) of main parts showing a different embodiment of the present invention. In this embodiment, a T-shaped head retraction lever 16 is slidably supported by the head stand 2. In other words, the head stand 2 has an elongated hole 2 that is elongated in a direction perpendicular to the direction in which the operating lever 1 moves.
a is formed, and the lever 1 is connected to this elongated hole 2a.
Pins 16a and 16b fixed to 6 are slidably fitted. The pin 10 is erected on the lower surface of the lever 16 and passes through the deformed hole 9, as in the previous embodiments. The head retraction lever 16 shown in FIG. 6 moves back in the direction of arrow B together with the head stand 2 during the head retraction movement process of the operation lever 1.
In the subsequent process of ejecting the pack, the pin 10 is moved in parallel in the direction of arrow N to escape to the other side 9b of the deformed hole 9, so that the same effect as in the embodiment shown in FIG. 1 can be expected.

As is clear from the above-mentioned embodiments, the pack ejecting mechanism of the present invention has a substantially dogleg-shaped deformed hole in the chassis, and a lever for retracting the head rotatably or slidably provided in the head stand. Since a pin is provided that passes through the deformation hole, the force that causes the head stand to return to its original state when the head stand is held in the retracted position does not act in the opposite direction to the direction in which the operating lever is pushed in, and the head stand is ejected. It is possible to reduce operating force and improve eject feeling.

[Brief explanation of drawings]

1 to 3 are views showing one embodiment of the present invention, and FIGS. 1a, b, and c are plan views showing playing states;
Enlarged plan view of side and main parts, Figure 2 a, b, c
3A, 3B and 3C are a plan view, a side view and an enlarged plan view of the main part showing the head in the retracted state, FIGS.
FIG. 4 is a perspective view showing an example of the locking mechanism, FIG. 5 is a plan view of main parts showing another embodiment of the present invention, and FIG. 6 is a plan view of main parts showing another embodiment of the invention. 1: Eject operation lever, 2: Head stand,
3, 3'16: Head retraction lever, 4: Chassis, 5: Loading lever, 6: Cassette pack, 7: Magnetic head, 8: Cassette pack holder, 9, 9': Deformation hole, 10, 10': pin, 1
1: Bar, 12: Link lever, 13: Engagement lever, 14: Cam lever, 15: Eject bar.

Claims (1)

[Scope of utility model registration request] In a cassette tape player that ejects a cassette pack by retracting a magnetic head by pushing in an operating lever, the head stand on which the magnetic head is mounted and the operating lever, which is pushed and operated when ejecting, are arranged on the front side and the back side, respectively. A chassis supported slidably in the same direction, a substantially dogleg-shaped deformed hole provided in the chassis, a lever for retracting the head rotatably or slidably provided on the head base, and a lever for retracting the head rotatably or slidably provided on the head stand; a pin that is erected on the operating lever and passes through the deformed hole, and in the first half of the stroke of the operating lever, the pin is guided along the deformed hole by an inclined portion provided on the operating lever in the pushing direction of the operating lever. By moving the head retracting lever and the head stand integrally, and in the latter half of the stroke, by moving the pin by the inclined portion, the pin is caused to undergo the deformation. 1. A pack ejecting mechanism for a cassette tape player, characterized in that a hole deviates from the direction in which the operating lever moves.