JPH058727U - Tape deck - Google Patents

Abstract

(57) [Summary] (Correction) [Structure] The rewinding switching body 69 for starting rotation of the supply reel shaft 10 in the rewinding direction, and the tape tension post at the rewinding position after the supply reel shaft 10 starts rewinding rotation. The tension releasing body 74 to be moved is provided on the mode lever 57 for switching the reproduction mode to the rewinding mode, and is switched to rewind and rotate the supply reel shaft 10 by the operation of the mode lever 57 for shifting to the rewinding mode. The supply reel shaft 10 is in the rewinding rotation state before the capstan is rotated, and the tape tension post is retracted to the rewinding position after the rewinding rotation is started. [Effect] Prevents problems such as tape sagging,
In addition, it is not necessary to adjust the complicated operation timing in the related art, and the assembling and adjusting work can be simplified more easily than in the related art.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tape deck incorporated in a video tape recorder or the like for recording or reproducing by mounting a video cassette, an audio cassette or a digital recording cassette.

[0002]

[Prior Art]

 Conventionally, there has been a technique in which video cassettes are attached to the supply reel shaft and the take-up reel shaft, and the supply reel shaft is rewound and rotated by a motor that drives a capstan to rewind the video tape to the supply reel side.

[0003]

[Problems to be solved by the device]

 In the prior art, since the capstan is rotated and switched to the rewinding rotation, the pinch roller is separated from the capstan before the operation of switching to the rewinding rotation is performed, and the tape runs and sags during the switching operation. However, there was a problem in production such that the timing of the reproduction or rewinding operation could not be easily adjusted.

[0004]

[Means for Solving the Problems]

 Therefore, the present invention provides the rewinding switching body that starts rotation of the supply reel shaft in the rewinding direction and the tension release body that moves the tape tension post to the rewinding position after the supply reel shaft starts rewinding rotation. It is characterized in that it is provided on the mode lever that switches the rewind mode to the rewind mode.Since it is switched to rewind and rotate the supply reel shaft by the mode lever operation that shifts to the rewind mode, the supply is performed before the capstan rotates. Since the reel shaft enters the rewinding rotation state and the tape tension post retracts to the rewinding position after the rewinding rotation starts, the structure prevents the occurrence of problems such as slack in the tape, and the complicated operation timing of the past. This makes adjustment of the item unnecessary and simplifies assembly and adjustment work more easily than before.

[0005]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 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 same. In the figure, (1) is a rectangular deck chassis in plan view, and (2) is a recording / playback head. A rotation-dependent head cylinder for mounting the VHS video cassette (9), which is vertically installed on slide bodies (7) and (8) that guide the slides through rails (5) and (6). Tape loading pin for winding the tape of the tape on the cylinder (2), supply and take-up reel shafts for supporting the tape reel of the cassette (9) for engagement, and (12) for audio. A head for inputting / outputting signals and the like, (13) an erasing head, (14) a capstan, and (15) a pinch roller.

Further, in the figure, (16) is a cassette holder for supporting the cassette (9), and (17) and (18) are erected on the upper surface of the chassis (1) to set the cassette (9) in / out position to the recording / reproducing position. Left and right guide plates for movably attaching the cassette holder (16) to the.

Further, a cam mechanism (19) is arranged on the upper surface of the chassis (1) on the right side of the cylinder (2). The cam mechanism (20) is provided, and as shown in FIG. The loading motor (22) is fixed to the upper side of the gear mechanism (19) via the bracket (21), and the motor (22) is linked to the worm gear (26) via the pulleys (23) (24) and the belt (25). A worm wheel gear (27) formed on the outer peripheral surface of the cam body (20) is continuously meshed with the worm gear (26) so that the motor (22) rotates the cam body (20) forward and backward. ..

Further, a cassette loading / unloading lever (28) for swinging by the cam body (20) is provided, and the loading / unloading lever (28) is loaded into the cassette via a rack gear (29) and cassette loading / unloading gears (30) (30). The cassette holder (16) is connected to the holder (16) and is slidably moved back and forth and up and down in association with the swing of the inlet / outlet lever (28), and the cassette (9) is moved relative to the reel shafts (10) and (11). ) Is configured to move in and out.

Further, as shown in FIG. 3, a tape loading lever (31) that reciprocally slides by the rotation of the cam body (20) is provided on the rear surface of the chassis (1), and the slide bodies (7) (8) are also provided. ) Is attached to the left and right shafts (35) and (36) on the rear surface of the chassis (1) so that the tape loading arms (33) and (34) are connected to the gears (37) ( 37) each arm (33) (34) is connected, one arm (34) is connected with the lever (31) through a pinion gear (38) and a rack gear (39), and the lever (31) is connected. The tape loading pins (3) and (4) are reciprocally slid by the guide of the rails (5) and (6) through the arms (33) and (34) of the reel shaft (10). (1 1 ), The tape of the cassette (9) is pulled out by the forward movement of the pins (3) and (4) and wound around the cylinder (2), while the tape is returned by the backward movement of the pins (3) and (4). The cassette is configured to be returned to the cassette (9).

Further, a flywheel motor (40) for driving the capstan shaft (14) is provided, and a tension pulley (43) is attached 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 pivotally supported on the support shaft (46) of the tension pulley (43), and the clutch gear (44) is connected to the clutch gear (44). An idle gear (47) that is constantly meshed is pivotally supported on 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 ) At a predetermined torque or less, and the on-support of the clutch lever (48) allows the tension pulley (43) and the clutch gear (44) to be integrally key-connected. It is configured as

Further, the tension wheel (43) and the swing arm (45) are swung together with the flywheel motor (40) in the normal and reverse directions within a range regulated by the stoppers (49) (49). The idle gear (47) is selectively meshed with one of the gears (50) (51) of each reel shaft (10) (11) to drive each reel shaft (10) (11) in the tape winding direction. It is configured to do.

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 moving the reel shaft (10) (11) into and out of contact with each other. 53 (54), brake levers (55) (56), and a mode lever (57) for switching the clutch lever (48), the cassette (9) mounted on the reel shafts (10) (11) Pins (58) (58) which are in contact with the bottom surface and support the cassette (9) at a predetermined height are vertically fixed to the chassis (1), and the pins (58) (58) and the long holes (59) ( 59) Mount the mode lever (57) on the upper surface of the chassis (1) so that the mode lever (57) can slide left and right.

Further, a linkage lever (60) for switching the mode lever (57) by rotation of the cam body (20) is provided, and an intermediate portion of the lever (60) is attached to the chassis (1) via a support shaft (61). It is rotatably attached, and both ends of the linkage lever (60) are connected to the cam body (20) and the mode lever (57), and the linkage lever (60) is swung by the forward and reverse rotation of the cam body (20). The lever (57) slides back and forth, and the levers (48) (52) (53) (54) (55) are used for tape constant speed moving mode, tape fast-forwarding mode, and tape rewinding mode for recording / playback. (56) is configured to be switched.

Further, as shown in FIGS. 3 and 5, the middle of the tension band (62) is supported on the supply reel shaft (10) by a half turn, and the tape tension lever (52) having the tape tension post (63) is supported. While connecting one end side of the tension band (62) via the connecting tool (64) and connecting the other end side of the tension band (62) to the tension adjusting lever (65) fixed to the upper surface of the chassis (1), A tension arm (67) is rotatably provided on the back surface of the chassis (1) via a support shaft (66), and the tension arm (67) is attached to the tape tension lever (52) via a tension spring (68). The tension post (63) is elastically pressed against the tape of the cassette (9) pulled out by the loading pins (3) and (4). The tape of the cassette (9) is configured to be given a predetermined tension during recording or playback.

Further, as shown in FIGS. 1 and 6, a leaf spring type ridge (69) is integrally formed on the mode lever (57) made of synthetic resin, and the supply reel shaft (10) is rewound in the rewinding direction. The rewinding switching body for starting rotation is formed by the ridge (69), and the hook-shaped tip of the ridge (69) is brought into contact with or engaged with the protrusion (70) of the swing arm (45). The swing arm (45) is swung in conjunction with the reciprocating motion of the mode lever (57) via the strip (69) and the protrusion (70), and the fast forward stage (71), the replay stage (72), and the winding stage A cam surface (74) having a return step (73) is formed on the mode lever (57), and after the supply reel shaft (10) starts rewinding rotation, the tape tension post (63) is moved to the rewinding position (phantom line in FIG. 6). Move the tension release body to the A position) to the cam surface. The cam floor pin (75) formed by the rewinding stage (73) of the (74) and integrally formed with the tension arm (67) is brought into contact with the cam surface (74), and the cam lever is slid to move the cam lever (57). The pin (75) is moved to each step (71) (72) (73) of the surface (74) to change the spring (68) pressure of the tension lever (52).

Then, in the reproducing (recording) state of FIGS. 1 and 6, the pin (75) is brought into contact with the reproducing stage (72) of the cam surface (74) to actuate the tension lever (52). 68) With maximum pressure, the tension post (63) is pressed against the video tape (78) supplied from the cassette (9) between the guide roll (76) and the fixed post (77) in front of the erasing head (13). The tension of the tape (78) is kept substantially constant, the cam body (20) is rotated by the control of the loading motor (22), and the mode lever (57) is slid to the right through the linkage lever (60). When the tape is rewound by moving it, the ridge (69) of the mode lever (57) contacts the protrusion (70) of the swing arm (45) and rotates the arm (45) counterclockwise. Turning Then, after the idle gear (47) is engaged with the gear (50) of the supply reel shaft (10) and the supply reel shaft (10) is connected to the flywheel motor (40), the mode lever (57) described above is connected. Slides further to the right, the flywheel motor (40) is turned on to rewind and rotate the supply reel shaft (10) counterclockwise, and the supply reel shaft (10) starts rewinding rotation. After that, the pin (75) moves to the rewind stage (73) of the cam surface (74), and the pressure of the spring (68) acting on the tension lever (52) is made smaller than that at the time of reproduction, and the phantom of FIG. The tension post (63) is retracted against the spring (68) by the tension of the tape (78) to the position of line A, the tension post (63) is moved to the rewind position, and the tape (78) is rewound. (Review) It is intended to perform the work.

[0017]

[Effect of the device]

 As apparent from the above-described embodiments, the present invention provides a rewind switch body (69) for starting the supply reel shaft (10) to rotate in the rewinding direction and a tape tension post after the supply reel shaft (10) starts rewinding rotation. The tension release body (74) for moving the (63) to the rewind position is provided on the mode lever (57) for switching the reproduction mode to the rewind mode. The mode lever (57) operation for shifting to the rewind mode As a result, the supply reel shaft (10) is switched to rewind rotation, so that the supply reel shaft (10) is in the rewind rotation state before the capstan (14) is rotated, and the tape is rewound after the rewind rotation is started. Since the tension post (63) retracts to the rewinding position, problems such as tape slack are prevented from occurring and the conventional complicated operation timing adjustment is performed. Was not required, in which like simplification of assembly and adjustment work can be easily performed than the prior art.

[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 portion.

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

FIG. 6 is a plan view of a tape tension post portion.

[Explanation of symbols]

 (10) Supply reel shaft (57) Mode lever (63) Tape tension post (69) Protrusion (rewinding switching body) (74) Cam surface (tension releasing body)

Claims (1)

[Claims for utility model registration] Claims: 1. A rewinding switching body for starting rotation of the supply reel shaft in the rewinding direction, and a tension for moving the tape tension post to the rewinding position after the supply reel shaft starts rewinding rotation. A tape deck characterized in that a release body is provided on a mode lever for switching a reproduction mode to a rewind mode.