JPH07111802B2 - Eject operation mechanism in tape player - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present application relates to an eject operation mechanism capable of safely performing an eject operation in a tape player.

2. Description of the Related Art The applicant first rotated the notch gear by a motor and actuated the eject operation member by the rotational power to move the cassette holder back to the raised position where the cassette can be inserted and removed, and at the same time, to move the head plate. We have proposed a tape player configured to retreat to the non-play position as Japanese Patent Application No. Sho 62-28030.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, in the above configuration, when a foreign object is inserted from the cassette insertion opening due to mischief or the like in the playing state of the tape player in which the cassette holder is descending, the insertion of the foreign object is not known. In addition, when the eject operation is performed, the cassette holder is prevented from moving up due to the presence of foreign matter. However, the notch gear continues to rotate by the motor and the ejecting operation is performed regardless of the fact that the rising is blocked. Therefore, there is an inconvenience that an unreasonable mechanical force acts on the mechanism section to cause mechanical damage or induce a failure such as heating the motor.

Then, this application aims at eliminating the above-mentioned inconvenience.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention has a conventional structure in which a toe-shaped cam portion that rotates integrally with the gear and a roller are slidably contacted to the periphery of the cam portion. A power urging member that is rotated by the rotation of the cam portion piece and an operating lever that guides the eject operation lever to an eject operation position, and a power urging member of the power urging member is provided between the power urging member and the operation lever. It is characterized in that the spring is interposed in a loaded state so that the eject operation lever is integrally operated in the eject operation direction during rotation.

Further, in the above-mentioned conventional configuration, the present application provides the eject operation lever and the mechanism for returning the head plate to the non-plate position between the eject operation lever and the mechanism for returning the head plate to the non-plate position. It is characterized in that it is equipped with a buffer means for cooperating together and for independently actuating the return mechanism of the head plate against an urging means at the time of an abnormality in which the operation of the eject operation lever is restricted.
In the above, the mechanism that operates the eject operation lever by the rotation of the notch gear is a toe-shaped cam portion piece that rotates integrally with the notch gear, and a power that rotates a roller by sliding a roller around the periphery of the cam portion piece. An urging member and an operating lever that is provided integrally with the urging member and guides the eject operation lever to the eject operation position in accordance with the rotation of the power urging member, and the cushioning means is provided on the eject operation lever. A buffer lever having an abutment piece that acts on the actuating lever is mounted slidably in the eject operation direction, and a spring is provided between them to urge the buffer lever in the anti-eject operation direction. The lever is provided with a cam piece that acts on the trochanter on the head plate to return the head plate. The moving mechanism converts the rotation of the cam part piece into a linear motion by sliding a roller on the peripheral edge of the cam part piece and the toe-shaped cam part piece that rotates integrally with the notched gear, and by the linear motion. , A power urging member that guides the eject operation lever to the eject operation position, and the buffer means attaches the buffer lever having the power urging member to the eject operation lever slidably in the operation direction. , A spring for urging the buffer lever in the anti-eject operation direction is provided between them, and the buffer lever is provided with a cam piece that acts on the trochanter provided on the head plate to return the head plate. It consists of

Action However, in a normal state, when the motor is driven by the eject operation to rotate the notch gear, the notch gear rotates to integrally rotate the power urging member and the operating lever by the spring to cause the eject operation lever to rotate. To operate the eject control lever,
The cassette holder returns to the raised position where the cassette can be inserted and removed, and the head plate retracts to the non-play position.

By the way, in the play state in which the cassette holder is lowered and the head plate is moved forward, if a foreign object is mistakenly inserted from the cassette insertion port and the eject operation by the eject operation lever is disabled, the eject operation is performed. Then, when the motor is driven, only the power urging member rotates against the spring due to the rotation of the notch gear, and a buffering effect is produced.

Furthermore, between the eject operation lever and the mechanism for returning the head plate to the non-play position, the rotation of the notch gear causes the co-operation with the eject operation lever through the biasing means in the normal state. In the case where the operation of the eject operation lever is restricted, a cushioning means for independently actuating the return mechanism of the head plate is provided against the biasing means in the configuration. When the notch gear is rotated by driving the motor, the cushioning means moves integrally with the eject operation lever via the biasing means, whereby the eject operation lever operates and the cassette holder can be inserted / removed in the cassette. To the ascending position, and the head plate retracts to return to the non-playing position. On the other hand, in an abnormal normal state, the rotation of the notch gear causes the cushioning means to slide independently of the ejecting lever against the biasing means, and the head plate is returned to the non-playing position via the returning mechanism. Move.

When the buffer lever is provided with a cam piece that acts on the trochanter provided on the head plate to move the head plate back, the cam piece acts on the trochanter by the movement of the buffer lever, and the head plate is moved. Retreats to non-play position.

Examples Hereinafter, examples of the present application will be described in detail with reference to the drawings.

(1) is a device frame, on one side of which operation levers (2) and (3) such as a tape fast-forward mechanism can be moved back and forth (horizontal direction in FIG. 1) in a horizontal state, and on the other side Ejection operation levers (4) are mounted on the side portions of the vehicle so as to be movable back and forth in a vertical state. (5) is connected to the rear frame (5) a, whose rear end (the left end in FIG. 1) both sides are supported by the pivot (6) with respect to the device frame (1) so as to be vertically tiltable, and its front edge. And a cassette holder composed of a front frame (5) b which can be moved up and down in a horizontal state, in the front-rear direction (left-right direction in the drawing) at the center of the rear frame (5) a.
Has a guide groove (7) extending to
When cassette C is inserted in the cassette holder (5),
An engagement piece (8) that engages with one reel hole is slidably attached. One end of (9) is the rear frame (5) a.
Is horizontally pivotally attached to the upper surface of the by a pivot (10),
In addition, a spring bearing piece is provided in the middle part, the other end of a connecting rod (12) having one end supported by a supporting piece (11) provided on the eject operation lever (4), and the tip of the spring receiving part and the engaging member. Gokoma (8)
A reversing spring (13) for elastically pressing the engaging piece (8) to the eject position of the cassette C is attached to the and.
(14) is the rear frame (5) a of the cassette holder (5)
Is a flat plate-shaped holding member which is attached to the inner surface of the upper part of the plate so as to be horizontally rotatable by the pivot shaft (10), and one side of which has an action piece (1) extending across the guide groove (7).
5), and the tongue piece (16) is provided on the outer piece, and the tongue piece (16) is brought into contact with the upper edge of the side wall (1) a of the device frame (1), whereby the holding member ( The cassette holder (5) is held horizontally via 14). (17)
Is attached to one side wall (1) a of the device frame (1) on the pivot (18).
It is a plate-shaped actuating piece that is pivotally attached via
A piece (17) a that extends forward from the pivot portion is engaged with a stop piece (19) provided on the eject operation lever (4) so that the eject operation lever (4) and the device frame (1). The engaging portion (21) for holding in the eject position against the biasing spring (20) stretched between the cassette holder and the piece (17) b extending rearward from the pivotal attachment portion. (5) Locking pins (23) for locking the cutout grooves (22) provided on the side surface of the rear frame (5) a are respectively provided, and the actuating piece (17) and the device frame (1) are provided. Between the locking pin (23)
A spring (24) that constantly presses down is stretched. Reference numeral (25) is a head plate having a magnetic head (26), which is attached by a known means so as to be movable in the left and right directions in FIG. 3, and the head plate (25) is
The spring (28) is always biased to the left (playing direction). A base portion of a detection lever (29), which is located on the insertion opening side (right side in FIG. 1) of the cassette C and extends in the left-right direction, is vertically rotatable by a pivot shaft (30) in the device frame (1). It is pivotally attached, and a sleeve piece (32) having a notch step portion (31) at its upper edge is integrally provided at the base portion thereof.
The detection lever (29) is constantly urged to rotate upward by the spring (33), and the urging causes the notch step portion (31) to come into contact with the lower surface of the head plate (25) to perform detection. The lever (29) is inclined upward.
(34) is a restoring spring of the holding member (14), (35)
Is a reel shaft provided on the surface of the vessel frame (1), and (36) is a motor.

Then, when the cassette C is inserted into the front frame (5) b of the cassette holder (5) from the right side in the non-playing state shown in FIGS. 1 and 2, one of the cassettes C is attached to the engaging piece (8). When the reel hole is engaged, the engaging piece (8) moves rearward, the reversing spring (13) reverses with the movement, and the reversing elasticity causes the cassette C to move together with the engaging piece (8). Automatically penetrate deep into the cassette holder (5).
Then, the action piece (15) crossing the guide groove (7)
Since it is pressed by the cassette C, the holding member (14) horizontally rotates counterclockwise in FIG. 1 against the restoring spring (25), whereby the tongue piece (16) is moved to the container frame (1). Since it comes off from the outer wall (1) a of the holding member (1) a in the non-playing state, the tongue piece (16) abuts against the side wall (1) a.
The rear frame (5) a of the cassette holder (5), which is held in a horizontal state via 4), is allowed to tilt downward. Therefore, the spring (24) causes the actuating piece (17) to
2 rotates counterclockwise in FIG. 2 to disengage the stop piece (19) from the engagement portion (21), and the eject operation lever (4) is ejected by the biasing spring (20). The rear frame (5) a is tilted downward and the front frame (5) b is protruded through the locking pin (23) and the notch groove (22) while protruding to a possible position. Horizontally descend to the 3rd and 4th
As shown in the figure, the play state is set.

On the other hand, when the cassette holder descends from the non-playing state, the detection lever (29) inclined upward is pressed against the cassette and pivots clockwise in FIG. 3, but in this case, the cassette is fully played. Until the head plate (25) is lowered to the position, the side edge of the head plate (25) contacts the notch step portion (31) of the detection lever (29), and the movement in the playing direction is restricted.

Thus, as shown in FIG. 6, when the cassette reaches the play state correctly, the detection lever (29) becomes horizontal, and the head plate (25) reaches the play position without any restraint. .

When the eject lever (4) is pressed against the spring (20) from this playing state, the arc surface of the cam piece (37) which is bent to the eject lever (4) and which is horizontally provided is the head plate. The head plate (25) is pushed in the non-playing direction in contact with the trochanter (38) provided on the (25), and the ejecting lever (4) is pushed in to press the spring through the connecting rod (12). Since the receiving piece (9) rotates counterclockwise in FIG. 3, the reversing spring (13) is reversed by the movement of its free end, and the reversing elastic force causes the engaging piece (8) to move the engaging piece (8). At the same time, it is guided in the guide groove (7) and moves in the right direction, that is, the eject direction in FIG. On the other hand, the tip of the eject operation lever (4) rotates the operating part piece (17) in the clockwise direction in FIG. 5 against the spring (24), so that the locking pin (23) and the notch groove (22). ) And the rear frame (5) of the cassette holder (5)
a tilts upward.

Furthermore, when the cassette C moves together with the engaging piece (8) in the eject direction, the pressing force of the operating piece (15) is released, and the holding member (14) is moved to the fourth position by the restoring spring (25).
When the rear frame (5) a reaches a horizontal state by the rotating action in the clockwise direction in the figure, the tongue piece (16) of the holding member (14) is again moved to the side of the device frame (1). When the cassette holder (5) is held in a horizontal state together with the holding member (14) by coming into contact with the upper edge of the edge (1) a, and when the ejection operation lever (4) is released from this state, the biasing spring ( 20) and retracts a little, and the stop piece (19) moves to the locking part (2
1) and return to the non-playing state shown in Figs.

Next, the eject operation function of operating the eject operation lever (4) using the rotational force of the motor (26) will be described in detail below.

FIG. 7 shows a plan view of the main part of the drive system of the eject operation mechanism as seen from the rear surface of the device frame (1).
Reference numeral 0) is a drive gear shaft supported by the output shaft of the motor (36), and the drive gear (42) is provided through a required intermediate gear group (41).
Drive is transmitted to. Reference numeral (43) is a notched gear provided on the lower surface of the auxiliary plate (1) b of the device frame (1), and the notched portion (43) a of the notched gear (43) is the main driving gear when the tape player is in the non-playing state. It is located at (42). Between the lower surface of the auxiliary plate (1) b and the notch gear (43), as shown in FIGS. 8 and 9, a motor switch (44),
A horizontally rotatable rotation control member (45) for controlling the rotation of the notch gear (43) and a horizontally rotatable rotation control member for switching the motor switch (44) by the rotation of the rotation control member (45) and the notch gear (43). The operation part piece (46) and the rotary shaft (43) b of the cutout gear (43) are axially fixed, and act on the biasing spring (47) to give an initial rotational force to the cutout gear (43). Protruding pieces (48)
And a toe-shaped cam portion piece (49) axially fixed to the rotating shaft (43) b, and the peripheral edge of the cam portion piece (49) is slidably contacted via a roller (50) to form the cam portion piece. A power urging member (51) that horizontally rotates with the rotation of (49) is provided.

In addition, on the upper surface of the device frame (1), a window hole (5
2) via the tongue piece (53) extending from the rotation control member (45) and the rod (55) 'are connected to the tongue piece (53) so that the rotation control member (45) is restored to its restoring spring ( 54) via the electromagnetic plunger (55) that urges against rotation against the force) and the window hole (56) opened in the equipment frame (1), and extends from the power urging member (51) and The eject operation lever (4) comes into contact with the contact piece (57) provided on the operation lever (4).
And an operating lever (58) for operating the tape cassette in the tape cassette ejection direction. The notch gear (43) has a control pin (59) provided at the free end (45) a of the rotation control member (45) and an action pin (at the end of the operation section piece (46) ( An annular control groove (61) and a guide groove (62) are provided concentrically with each other for guiding the gears (60) and (60) along with the rotation of the notch gear (43). In the play state, engage the control pin (59) and set the notch gear (43) to the first position.
To the first locking portion (61) a held at the locking position and the second locking position immediately before meshing with the main driving gear (42) in the play state,
A second locking portion (61) b for allowing the rotation of the rotation control member (45) to be held at that position is provided, and the guide groove (62) is provided with a motor switch (44) in a non-playing state. ) Holding the movable contact piece to the other fixed terminal (44) b.
2) a is provided.

FIG. 10 shows an electric control circuit of the above-mentioned eject operation mechanism. In the figure, (65) is a start switch which is turned on when the engine key of the automobile is turned on, and (6
6) is a cassette detection switch which detects the state when the tape cassette C is inserted into the cassette holder (5) and the front frame (5) b of the cassette holder (5) is lowered to the play state. As shown in FIG. 5, the front frame (5) b of the cassette holder (5) is lowered and the operating part (1)
When the locking piece (19) and the locking part (21) are disengaged by the rotation of 7) and the ejecting operation lever (4) is pressed by the biasing spring (20) to the right in the figure, the ejecting operation is performed. It is operated by an operation piece (67) provided on the lever (4). Reference numeral (68) is an eject switch which is switched by, for example, pressing an operation button instead of manually operating the eject operation lever (4) when ejecting the cassette C,
The movable contact of the motor switch (44) and the normally-off start switch (65) are connected to one pole of the power source,
One fixed terminal (44) a of the motor switch (44) is connected to one pole of the motor (36), and the other fixed terminal (44) b of the motor switch (44) is connected to the eject switch (68).
One fixed terminal (68) a and the other fixed terminal (68) b are connected to the starting switch (65), respectively, and the movable contact of the motor switch (44) is connected to the other fixed terminal (68). 44) It touches b. Also, the movable contact piece of the eject switch (68) is normally the other fixed terminal (68).
While being in contact with b, the movable contact piece is connected to one pole of the electromagnetic plunger (55) through the cassette detection switch (66), and the motor (36) and the electromagnetic plunger (55) are connected to the lower pole of the power source. ) Each other pole is connected.

Then, as shown in FIGS. 8 and 9, the control pin (59) is
The rotation control member (45) is in the first rest position and is engaged with the locking portion (61) a, the action pin (60) is in the bent portion (62) a position, and the cassette holder ( Since 5) is in the non-playing state, as shown in FIG. 10, when the cassette detection switch (66) is OFF, the start switch (65) is turned ON, and the cassette is held in the cassette holder (5). When C is inserted, as described above, the front frame (5) b of the cassette holder (5) is lowered to be in the play state, which causes the cassette detection switch (66).
Is turned on, the electromagnetic plunger (55) is energized, the excitation causes the tongue (53) of the rotation control member (45) to be pulled, and the rotation control member (45) rotates counterclockwise in the figure. Since the control pin (59) is disengaged from the first locking portion (61) a, the driven gear (43) is moved by the rotational biasing force of the pressure contact between the biasing spring (47) and the protruding piece (48). In the figure, the control pin (59) is urged to rotate counterclockwise in the figure, and the control pin (59) engages with the second engaging portion (61) b to prevent the notch gear (43) from rotating. ) Rests in the second rest position,
Since the action pin (60) is disengaged from the bent portion (62) a, the operation member (46) rotates counterclockwise in the figure, and the motor switch (44) is fixed to one side by the operation piece (46) a. The terminal (44) a is switched to the state shown in FIG.

Then, in FIG. 10, since the motor circuit is closed, the motor (36) is energized, and the rotation of the motor (36) causes the driving gear (42) to rotate.

Therefore, by the rotation of the motor (36), the cassette tape runs and constitutes a play state.

When the eject switch (68) is temporarily switched to one of the fixed terminals (68) a via the operation button in order to eject the cassette C from this play state, the electromagnetic plunger (55) is de-energized. Be done.

Then, the rotation control member (45) is rotated clockwise by the restoring spring (54), and the control pin (59) is disengaged from the second locking portion (61) b, so that the biasing spring (47). A slight rotational force is applied to the notch gear (43) by pressure contact between the notch gear (43) and the protruding piece (48), whereby the notch gear (43) meshes with the main driving gear (42), and thereafter the notch gear (43). Are rotationally driven by the rotational force of the main driving gear (42), that is, the motor (36).

When the motor circuit is energized, the action pin (60) is
2) Roller (50) that is held by sliding inside and is in contact with its peripheral edge by the cam piece (49).
As shown in FIG. 12, the power urging member (51) is rotated counterclockwise in FIG.
And the contact piece (57) contact each other, the eject operation lever (4) moves rearward in the drawing, that is, in FIG.
Move the eject control lever (4) to its spring (2
It is subjected to exactly the same action as against manual operation against 0), whereby the cassette C is ejected from the cassette holder (5) as described above.

On the other hand, the notch gear (43) is disengaged from the main drive gear (42) when the gear makes almost one revolution, and the control pin (59) again acts on the first engaging portion (61) a and the action pin. (60) is engaged with the bent portion (62) a, respectively, and shows the non-playing state.
It returns to the state shown in Figs.

Further, in FIG. 10, when the engine key is removed and the start switch is OFF, if the cassette C is mistakenly inserted into the cassette holder (5), the cassette holder (5) reaches the cassette loading position. When the cassette detection switch (66) is turned on and the motor (36) does not rotate, the cassette holder (5) maintains the play state.

Therefore, in such a case, the eject switch (68) is operated to temporarily switch from the other fixed terminal (68) b to the one fixed terminal (68) a. Then, the electromagnetic plunger (55) is energized, and by its operation, the notch gear (43) reaches the second rest position, the motor switch (44) is switched to the one fixed terminal (44) a, and the motor (36 ) Rotates, and the motor switch (44) switches to one fixed terminal (44) a, whereby the electromagnetic plunger is de-energized, which causes the notch gear (43) to move, as described above.
The cassette holder (5) is returned to the cassette ejecting position by meshing with the main driving gear (42) and the rotation of the notch gear (43) almost once.

The above shows the configuration of the tape player that was previously developed by the applicant.
As is apparent from the figure, the power applying member (51) and the operating lever (58) are separated and independent, and their bases (51) 'and (58)' are attached to the auxiliary plate (1) b. The shaft pieces (70) projecting from the upper and lower positions are rotatably supported respectively, and a base portion (58) 'of the operating lever (58) is interposed between them.
The spring (71) is interposed so that the side edge of the power applying member (51) is in pressure contact with the downward stopper (58) ″ provided by bending.

Then, in the play state shown in FIG. 13 corresponding to FIG. 11, the eject switch (68) is used to eject the cassette P.
By operating the biasing spring (4
The notch gear (43) meshes with the main drive gear (42) by the initial rotational force due to the pressure contact between the 7) and the protruding piece (48), and the notch gear (43) is rotated counterclockwise by the rotational force of the motor (36). Since the roller (50) is driven to rotate and the roller (50) is in sliding contact with the peripheral edge of the cam part piece (49) as the cutout gear (43) rotates, the power urging member (51) moves counterclockwise in FIG. Turn to. Further, in the present application, since the power urging member (51) and the operating lever (58) are integrated by the spring (71), as described above, the operating lever (58) and the contact piece (57) are connected to each other. By the contact of the eject control lever (4), the eject control lever (4) is slid against the spring (20), that is, in the state shown in FIG. 14, and the cassette C is ejected from the cassette holder (5).

By the way, in the above description, if a foreign substance that impedes the upward movement of the cassette holder (5) intrudes in the play state, the following operation is performed.

That is, with the rotation of the notched gear (43) in the counterclockwise direction, the roller (50) is in sliding contact with the peripheral edge of the cam portion (49), so that the power urging member (51) also rotates in the counterclockwise direction. However, since the eject operation lever (4) is in a state in which the eject operation cannot be performed due to the presence of foreign matter, as shown in FIG. 15, only the power urging member (51) has the spring (71). It rotates counterclockwise against and is restored when the roller (50) passes the tip of the cam piece (49).

This operation is repeated until the eject switch (66) is turned off while the foreign matter is present.

17 and 18 show another embodiment of the present application, in which the power urging member (51) and the operating lever (58) are integrally formed in the same manner as in the prior art, without being separated, and , The ejecting lever (4) is provided with a buffer lever (72) having a contact piece (57) that acts on the actuating lever (58).
3) is attached slidably in the longitudinal direction through the engagement of the slot (74) with the eject hole (4).
A spring (75) for elastically biasing the buffer lever (72) in one direction is stretched between the buffer lever (72) and the buffer lever (72).

Then, when the eject switch (68) is operated in the play state shown in FIG. 17, as already described,
The notch gear (43) rotates counterclockwise, and the rotation causes the operating lever (58) to rotate counterclockwise in the figure via the roller (50) that is in sliding contact with the peripheral edge of the cam piece (49). Although it rotates, when the eject operation lever (4) is in a state in which the eject operation cannot be performed due to the presence of foreign matter, as shown in FIG. 18, only the buffer lever (72) has the spring ( 75) slides against the roller (5
0) is restored when it goes beyond the tip of the cam piece (49), and this action is performed while the foreign matter is present.
Repeated until 8) is turned off.

FIGS. 19 and 20 show another embodiment of the present application. This configuration, as shown in FIGS. 17 and 18, includes a buffer lever (72) and a spring (75). (Five
In place of the power urging member (51) including 8), the buffer lever (7
A roller (77) which is slidably contacted with the peripheral edge of the cam part piece (49) is attached to the support piece (76) provided in 2), and the contact piece (57) is provided.
Is omitted.

When the eject switch (68) is operated in the playing state shown in FIG. 19, the notch gear (43) rotates counterclockwise as described above, and the rotation of the cam piece (49) follows the rotation. The roller (77) that is in sliding contact with the peripheral edge moves linearly in the vertical direction, but when the eject control lever (4) is in a state in which the eject control cannot be performed due to the presence of foreign matter, FIG. As shown in, only the buffer lever (72) slides against the spring (75) and is restored when the roller (77) passes the tip of the cam piece (49). While the foreign matter is present, the eject switch (68) is repeated until it is turned off.

21 and 22 show still another embodiment of the present application. In this configuration, the cam piece (37) is provided on the buffer lever (72) side in the embodiment shown in FIGS. The operation lever (4) is used exclusively for returning the cassette holder (5) to the eject position, and when only the buffer lever (72) slides against the spring (75) due to the presence of foreign matter, the head is moved. The plate (25) is returned to the non-playing position and held by a known holding mechanism. With this configuration, the head plate (25) is retracted to release the pressure contact state between the pinch roller and the capstan even when the player is discontinued when the engine key is removed in the presence of foreign matter, for example. It is possible to prevent their deformation and the influence on the magnetic tape.

23 and 24 show another embodiment of the present application,
This structure is the same as the embodiment shown in FIGS. 19 and 20 in that the cam piece (37) is provided on the buffer lever (72) side.
The operation is similar to that of the embodiment shown in FIGS.

EFFECTS OF THE INVENTION Since the present application is configured as described above, even if foreign matter accidentally intervenes and the return movement of the eject operation lever is prevented, mechanical damage to the mechanism part and electrical failure to the motor will occur. It is effective in that it can be safely handled without giving up, and the mechanical structure is simple, and when the cushioning means is provided with a returning mechanism of the head plate, the notched gear can be used in the event of an abnormal presence of foreign matter. Since the head plate is moved back by one rotation to separate the pinch roller from the capstan, there is an advantage that the deformation of these or the fear of affecting the magnetic tape can be eliminated.

[Brief description of drawings]

FIGS. 1 to 12 show a conventional structure. FIG. 1 is a plan view of a tape player in a non-playing state, FIG. 2 is a side view of the same, FIG. 3 is a front view of the same, and FIG. 4 is a playing state. FIG. 5 is a plan view of the tape player in FIG. 5, FIG. 5 is a side view of the same, FIG. 6 is a front view of the same, FIG. 7 is a plan view of a gear transmission mechanism, FIG. 8 is a plan view of essential parts, and FIG. In the figure, a plan view crossing the lower surface of the auxiliary plate, FIG. 10 is a control circuit diagram, and 11 and 12.
FIG. 13 is a plan view showing an eject operation state, FIGS. 13 to 24 show an embodiment of the present application, FIG. 13 is a plan view in a play state, and FIG. 14 is a plan view showing an eject operation state at a normal time. FIG. 15 is a plan view showing an ejecting operation state at the time of abnormality, FIG. 16 is an exploded perspective view, FIGS. 17 and 18 are other embodiments corresponding to FIGS. 13 and 15, respectively, and FIGS. Is a further embodiment diagram corresponding to FIGS. 13 and 15, respectively.
FIGS. 1 and 22 are still another embodiment diagrams corresponding to FIGS. 13 and 15, respectively, and FIGS. 23 and 24 are still other embodiment diagrams corresponding to FIGS. 13 and 15, respectively. In the figure, (1) is a device frame, (4) is an eject control lever,
(5) is a cassette holder, (25) is a head plate,
(36) is a motor, (37) is a cam piece, (42) is a driving gear,
(43) is a notched gear, (49) is a cam piece, (50), (77)
Is a roller, (51) is a power urging member, (57) is a contact piece, and (6
8) is an eject switch, (71) is a spring, (72) is a buffer lever, (75) is a spring, and (76) is a support piece.

Claims (4)

[Claims] 1. An eject actuating mechanism in a tape player having a structure in which a notch gear is rotated by a motor and the eject operation lever is actuated by the rotation to return the cassette holder and the head plate to their non-play positions, respectively. A toe-shaped cam part piece that rotates integrally with the notched gear, a power urging member that rotates with the rotation of the cam part piece with a roller slidably contacting the peripheral edge of the cam part piece, and an eject operation lever eject operation An operating lever for guiding the position, and a spring interposed between the power urging member and the operating lever so as to integrally operate the eject operation lever in the eject operation direction when the power urging member rotates. An eject operation mechanism in a tape player characterized by the above. 2. An eject actuating mechanism in a tape player configured to rotate a notch gear by a motor and actuate an eject operation lever by the rotation to return the cassette holder and the head plate to non-play positions, respectively. Between the eject operation lever and the mechanism for returning the head plate to the non-play position, the rotation of the notch gear normally causes the eject operation lever to co-operate integrally with the eject operation lever via the biasing means. An eject actuating mechanism in a tape player, characterized in that it is equipped with a cushioning means for independently actuating the returning mechanism of the head plate against an urging means when the operation is restricted. 3. A mechanism for actuating an eject operation lever by the rotation of a notched gear, wherein the mechanism is a toe-shaped cam portion that rotates integrally with the notched gear, and a roller is brought into sliding contact with the peripheral edge of the cam portion to rotate. A power urging member, and an operating lever that is provided integrally with the power urging member and that guides the eject operation lever to the eject operation position with the rotation of the power urging member, and
The shock-absorbing means attaches to the eject operation lever a shock-absorbing lever having a contact piece that acts on the actuating lever so as to be slidable in the eject operation direction, and between them,
3. A spring for urging the buffer lever in the anti-ejection operation direction is provided, and the buffer lever is provided with a cam piece that acts on a trochanter provided on the head plate to move the head plate back. Ejecting mechanism for tape players. 4. A mechanism for actuating an eject operation lever by rotation of a notched gear, and a cam-shaped piece having a toe-like shape that rotates integrally with the notched gear, and a roller slidably contacting a peripheral edge of the cam portion and a cam portion. The rotation of one piece is converted into a linear movement, and the linear movement includes a power urging member that guides the eject operation lever to the eject operation position, and the buffering means ejects the buffer lever having the power urging member. The operating lever is slidably mounted in the operating direction, and a spring for urging the buffer lever in the anti-eject operating direction is provided between them, and the buffer lever includes a trochanter provided on the head plate. 3. The eject actuating mechanism in the tape player according to claim 2, further comprising a cam piece that acts to move the head plate back.