JP2513648Y2 - Tape deck - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape deck incorporated in a video tape recorder for recording or reproducing data by mounting a video cassette, an audio cassette or a digital recording cassette.

[0002]

2. Description of the Related Art Conventionally, a suction-type solenoid is used to release a brake on a reel base to fast-forward the tape, and at the same time, release the solenoid to apply a brake to the reel-base to stop the tape from the fast-forward state. There was a technique to stop the reel stand promptly when making it.

[0003]

In the above-mentioned prior art, by attaching an adsorption type solenoid and a power supply circuit for the solenoid, the cost of parts is increased and the weight and the like cannot be easily reduced. There was a problem above.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention is directed to a tape deck including a cam body rotated by a loading motor and a mode lever for switching the tape operation. The rotation of the cam body moves the mode lever to the tape fast-forward position. A link lever for switching is provided, and a stop spring for moving the mode lever from the rapid feed position to the brake position is coupled to the link lever, and a lock lever for engaging and disengaging the link lever by the loading motor control is provided. the lock lever is engaged linked to, also perform disengagement of the lock lever two
There are two means, one of which is the disengagement means.
Mode is switched to the next mode Locked by the forward rotation of the cam body
Stop provided on the cam body that displaces the lever to the disengaged position
Section, the other disengagement means is the tape fast-forward end operation.
Loading mode, which is performed for a predetermined time when
Between the motor and the cam body, which idles when the motor is rotating in reverse
Displace the lock lever to the disengaged position by the transmission member.
It is a kick lever provided on the lock lever, which can maintain the stop function at the time of fast-forwarding tape operation without using a conventional suction solenoid, etc. It is possible to easily reduce the manufacturing cost of the brake mechanism including the spring and reduce the size and weight. Also, tape fast forward end operation
Kick lever that operates quickly when is done for a short time
Can be braked while the
It is necessary to rotate the motor in reverse when shifting to raw mode.
Brake at the stop that operates continuously (normal rotation)
It can prevent the motor control from becoming complicated.
is there.

[0005]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view of a main part, FIG. 2 is a plan view of a VHS video tape recorder, and FIG. 3 is a bottom view of the VHS video tape recorder.
Is a rectangular deck chassis in plan view, (2) is a rotatable head cylinder for mounting a recording / playback head, etc., (3)
(4) is a tape which is erected on slide bodies (7) and (8) which slide and guide via rails (5) and (6) to wind the tape of the VHS video cassette (9) around the cylinder (2). Loading pins, (10) and (11) are supply and take-up reel shafts that support the tape reels of the cassette (9) as engaging shafts, (12) is a head that inputs and outputs audio signals, and (13) is an erasing head. (14) is a capstan, and (15) is a pinch roller.

In the figure, (16) is the cassette (9).
The cassette holder (17) and (18) are left and right guide plates which stand upright on the upper surface of the chassis (1) and movably mount the cassette holder (16) at the cassette (9) entrance / exit position or recording / reproducing position. .

Further, a cam mechanism (19) is provided on the upper surface of the chassis (1) on the right side of the cylinder (2). The cam mechanism (20) is provided with a disc-shaped cam body (20) as shown in FIG. A loading motor (22) is fixedly mounted on the upper side of the mechanism (19) via a bracket (21).
3) The motor (22) is linked to the worm gear (26) via the (24) and the belt (25), and the cam body (2) is connected.
0) The worm wheel gear (27) formed on the outer peripheral surface is always meshed with the worm gear (26), and the motor (2)
2), the cam body (20) is configured to rotate forward and reverse.

Further, there is provided a cassette access lever (28) which is swung by the cam body (20), and the access lever (28) is connected to the cassette via a rack gear (29) and cassette access gears (30) (30). Holder (1
6), the cassette holder (16) is slid back and forth and up and down in conjunction with the swing of the access lever (28), and the cassette (9) is moved relative to the reel shafts (10) and (11).
It is configured to let in and out.

Further, as shown in FIG. 3, a cam body (20)
A tape loading lever (31) is provided on the rear surface of the chassis (1) for reciprocating sliding by rotation of the tape loading arm, and is connected to the slide bodies (7) (8) via links (32) (32). 33)
(34) the left and right axes (35) (3
6), the arms (33) and (34) are connected via gears (37) and (37), and the pinion gear (38) and the rack gear (3) are connected to one arm (34).
9), the lever (31) is connected thereto, and the tape loading pin (3) is guided by the rails (5) and (6) through the arms (33) and (34) by sliding of the lever (31). (4) slides back and forth, and the tape of the cassette (9) supported on the reel shafts (10) and (11) is pulled out by the forward movement of the pins (3) and (4) and wound around the cylinder (2). On the other hand, the tape is returned to the cassette (9) by the return of the pins (3) and (4).

Also, a flywheel motor (40) for driving the capstan shaft (14) is provided, and a tension pulley (43) is connected to an output pulley (41) of the motor (40) via a belt (42). As shown in FIG. 5, the clutch gear (44) and the swing arm (45) are supported on the support shaft (46) of the tension pulley (43), and are always meshed with the clutch gear (44). The idle gear (47) is rotatably supported by the swing arm (45). When the clutch lever (48) is off-supported as shown in FIG. 5, the tension pulley (43) and the clutch gear (44) are fixed. While linking below the torque,
The tension pulley (43) and the clutch gear (44) are integrally key-coupled by the ON support of the clutch lever (48).

The flywheel motor (40)
, The tension pulley (43) and the swing arm (45) are rotated and swung together within the range regulated by the stoppers (49) and (49), and each reel shaft (10) is rotated.
The idle gear (47) is selectively meshed with one of the gears (50) and (51) of (11), and each reel shaft (10)
(11) is configured to be driven in the tape winding direction.

Further, as shown in FIGS. 4 and 5, a tape tension lever (52) for maintaining the tape tension when the tape is pulled out from the cassette (9), and a back tension lever () for coming into contact with and separating from the reel shafts (10) and (11). A cassette (9) having a mode lever (57) for switching the clutch lever (48), and a mode lever (57) for switching between the clutch lever (48) and the reel shaft (10) (11); Pins (58) and (58) for supporting the cassette (9) at a predetermined height in contact with the bottom surface are erected and fixed to the chassis (1), and the pins (58) and (58) and the elongated holes (5) are fixed.
9) The mode lever (57) is attached to the upper surface of the chassis (1) via the (59) so as to be slidable left and right.

A link lever (60) for switching a mode lever (57) by rotation of the cam body (20) is provided, and an intermediate portion of the lever (60) is rotated to a chassis (1) via a support shaft (61). Attach it freely, and connect the link lever (6) to the cam body (20) and the mode lever (57).
0) The both ends are connected, and the link lever (60) is swung by forward / reverse rotation of the cam body (20), and the mode lever (5) is rotated.
7) The levers (48), (52), (53), and (54) are set in the tape constant speed movement mode, the tape fast forward mode, and the tape rewind mode for performing recording and playback.
It is configured to switch between (55) and (56).

Further, as shown in FIGS. 1, 6 and 7,
A lock lever (62) for engaging and disengaging the linkage lever (60) under the control of the loading motor (22); and a mode switching cam groove (6) of the cam body (20).
The pin (64) on one end side of the link lever (60) is inserted into 3), and the engaging notch (65) into which the end of the link lever (60) provided with the pin (64) is inserted is provided with the lock lever (62). ) A spring (66) is formed on one end side.
A friction gear (67) that slips at a predetermined torque or more set by the lock lever (62) is pivotally supported at the other end of the lock lever (62), and the friction gear (67) is attached to a worm wheel gear (27) on the outer periphery of the cam body (20). Always engage.

A cam shaft (68) for fixing the upper end to the bracket (21) is provided substantially vertically, and the cam shaft (6)
8), a cam body (20) is rotatably supported on the cam body (20), and the cam body (2) is rotated by a loading motor (22) in the state of FIG.
When 0) is rotated clockwise, the mode lever (57) is moved by the linkage lever (60) that follows the cam groove (63).
Is applied to the lock lever (62) through the friction gear (67), and the lock lever (62) is rotated by the clockwise rotation about the support shaft (69). A lock lever (62) is connected to the tip of the link lever (60) at the fast-forward position via an engagement notch (65) to fix the mode lever (57) at the tape fast-forward position.

Further, a rapid feed stop (70) is integrally formed on the lower surface of the cam body (20) so as to protrude therefrom, and the cam body (20) is further rotated clockwise from the tape fast forward state of FIG. Pin (7) on the upper surface of the lock lever (62)
The stop (70) abuts on 1), and the link lever (6)
0), the lock lever (62) is displaced in the direction in which the engagement notch (65) is disengaged from the lock lever (6).
2) The engagement operation of 2) is released, the operation of switching from the tape fast-forward to the next mode is performed by continuous rotation of the cam body (20), and the stop spring (72) is connected to the link lever (60). When the lock lever (62) is released, the linkage lever (60) of FIG. 1 is rotated counterclockwise by the force of the stop spring (72), and the mode lever (57) is moved from the rapid feed position to the brake position by the lever (60). By moving the brake levers (55) and (56), the reel shafts (10) and (11) are resiliently pressed by springs (73).

Further, as shown in FIGS. 6 and 7, a kick lever (74) integrally connected to the lock lever (62) via a support shaft (69) is provided as two synthetic resin lever bodies. Each of the levers (62) (74) and the support shaft (6)
9) is integrally formed by outsert molding, and each of the levers (6) is placed at a position facing the front and back surfaces of the sheet metal chassis (1).
2) While disposing (74), the kick arm (75) is rotatably supported by the kick lever (74), and the kick arm (75) is oscillated and rotated in one direction by a spring (76). The kick arm (75) is configured to rotate integrally with the kick lever (74) by a stopper (77) in the other direction.

Further, as shown in FIGS. 8 and 9, the boss portion (78) of the pulley (24) and the worm gear (2).
6) is rotatably supported on a shaft (79), and the shaft (7)
9) Both ends of the bearing notch (80) (8) of the chassis (1)
0) via an engaging arm (81), and a ridge (83) at the end of the boss (78) is inserted into a shaft hole (82) at the end of the worm gear (26). The projection (84) for contacting the ridge (83) is formed in the shaft hole (82).
The pulley (24) and the worm gear (26) are key-fitted freely by a predetermined angle by engagement of the ridge (83) and the projection (84).

Six ribs (85) contacting the kick arm (75) are integrally formed on the side surface of the pulley (24), and are formed on the same circumference around the axis of the pulley (24). The ribs (85) are arranged at equal intervals, and when the lock lever (62) is engaged with the link lever (60) at the tape fast-forward position as shown in FIG. The kick arm (75) moves inward, and the motor (22) for rotating the cam body (20) clockwise rotates the kick arm (75) by the contact of the rib (85). The levers (60) and (62) are connected and maintained, and the tape fast-forward operation is performed by driving the reel shafts (10) and (11) of the flywheel motor (40). End operation (stop button Wherein the emission operation) Motor (2
2) is reversely rotated for a predetermined time, and the rib (8) and the protrusion (84) are disengaged, the rib (8)
5) abuts against the kick arm (75), rotates the lock lever (62) counterclockwise through the kick lever (74), and releases the lock lever (62) with respect to the link lever (60); The linkage lever (60) is rotated in the counterclockwise direction by the stop spring (72), and the brake levers (55) and (56) are moved to the reel shaft (10) ( 11)
It is configured to be crimped to and to stop the fast-forwarding operation of the tape.

[0020]

As is apparent from the above embodiments, the present invention is a tape deck including a cam body (20) rotated by a loading motor (22) and a mode lever (57) for switching tape operation. A link lever (60) for switching the mode lever (57) to the tape fast-forward position by the rotation of the body (20) is provided, and a stop spring (72) for moving the mode lever (57) from the fast-forward position to the brake position is provided as the link lever. (60)
And the loading motor (22)
A lock lever (62) for engaging and disengaging the linkage lever (60) by control is provided, and the linkage lever (60) in the fast-forward position is provided.
Is provided with two means for engaging and coupling the lock lever (62) and for disengaging the lock lever (62).
The disengagement means from the tape fast-forward mode to the next mode
The forward rotation of the changing cam body (20) causes the lock lever (6
Provided on the cam body (20) for displacing 2) to the disengagement position.
The other stop means (70) and the other disengagement means is a tape
It is performed for a predetermined time when the fast forward end operation is performed.
When the loading motor (22) rotates in the reverse direction, it spins without load
The transmission member (2) between the motor (22) and the cam body (20)
4) Displace the lock lever (62) to the disengaged position
The kick lever (7) provided on the lock lever (62)
5) is a brake mechanism including a lock lever (62), a stop spring (72) and the like, which can maintain a stop function at the time of fast-forwarding tape operation without using a conventional suction solenoid or the like. It is possible to easily reduce the manufacturing cost and reduce the size and weight. Also, when the tape fast forward end operation is performed, it is prompt
Brake in a short time with the kick lever (75)
Can be played while playing after tape loading
Rotate the motor (22) in reverse when shifting to the mode
Stop unit (70) that operates continuously (forward) without need
The brake can be applied with the control of the motor (22)
Can be prevented from becoming complicated.

[Brief description of drawings]

FIG. 1 is a plan view of a main part.

FIG. 2 is a plan view of a video tape recorder.

FIG. 3 is a bottom view of the same.

FIG. 4 is a plan view of a link lever unit.

FIG. 5 is a plan view of a mode lever portion.

FIG. 6 is a sectional view of a cam body.

FIG. 7 is an explanatory diagram of a lock lever unit.

FIG. 8 is a sectional view of a worm gear portion.

FIG. 9 is an explanatory view of the disassembly.

[Explanation of symbols]

 (20) Cam body (22) Loading motor (57) Mode lever (60) Link lever (62) Lock lever (72) Stop spring

Claims (1)

(57) [Scope of utility model registration request] 1. A tape deck comprising a cam body rotated by a loading motor and a mode lever for switching a tape operation, a link lever for switching the mode lever to a tape fast-forward position by rotation of the cam body is provided, and the mode lever is provided. A stop spring for moving from the fast-forward position to the brake position is connected to the link lever, and a lock lever for engaging and disengaging the link lever by the loading motor control is provided, and the lock lever is engaged and linked to the link lever at the fast-forward position. It is equipped with two means for releasing the engagement of the lock lever.
Steps are cam bodies that switch from tape fast-forward mode to the next mode
The lock lever is displaced to the disengaged position by the forward rotation of
The other end of the engagement release means is a
When a fast forward end operation is performed
When the loading motor rotates in the reverse direction, it spins without load
Engage the lock lever with the transmission member between the motor and the cam body
Kick lever provided on the lock lever that displaces to the release position
Tape deck, which is a chromatography.