JPH0719823U - Tape deck - Google Patents

Abstract

(57) [Summary] [Purpose] The tape loading lever of the tape deck is configured to be linearly movable, and stable lever operation is obtained. [Structure] A cam that connects the rack gear (39) of the tape loading lever (31) to the loading gears (37) and (37) that reciprocate the tape loading pins (3) and (4), and that is rotated by the loading motor (22). A tape provided with a linear guide body (65) (69) for linearly reciprocatingly slidingly guiding and supporting the tape loading lever (31) on a tape deck for connecting the tape loading lever (31) to the body (20). In the deck, the tape loading lever (3
In the vicinity of the cam floor pin (63) provided in (1), the sliding surface with the chassis (1) is attached to the tape loading lever (3).
Provided integrally in 1).

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 is a loading gear for reciprocally moving a tape loading pin as disclosed in JP-A-1-220170, JP-A-63-247954, JP-A-61-187151, and JP-A-61-189443. Connect the rack gear of the tape loading lever, and connect the tape loading lever to the cam body that is rotated by the loading motor. The provided tape deck is disclosed.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional technique, compared with the swing type tape loading lever, the mounting space of the lever can be made compact and the arrangement can be simplified easily, and the number of parts can be reduced to reduce the manufacturing cost. Although it has the advantage that it can be easily achieved, unlike the swing type where the lever is pivotally supported on the chassis at the swing fulcrum, the linear movement lever is supported on the chassis by the long hole and the pin, so it is stable. There was a problem that it was difficult to obtain the reciprocating sliding.

[0004]

[Means for Solving the Problems]

 Therefore, according to the present invention, the rack gear of the tape loading lever is connected to the loading gear that reciprocates the tape loading pin, and the tape loading lever is linearly reciprocated to connect the tape loading lever to the cam body rotated by the loading motor. In a tape deck provided with a linear guide body that slidably guides and supports the tape loading lever, a sliding surface with a chassis is provided integrally with the tape loading lever near a cam floor pin provided on the tape loading lever. The sliding surface of the tape loading lever with respect to the chassis serves to further stabilize the reciprocating sliding movement of the lever, and the linearly moving lever can surely perform the tape loading.

Then, a cam floor pin is fixed to a sliding surface of the loading lever with the chassis, and a long hole facing the center of rotation of the cam body on the sliding contact surface of the chassis with the loading lever is used as one linear guide body. It is preferable that the cam floor pin is inserted into the linear guide body and the tip of the cam floor pin is engaged with the tape loading cam groove of the cam body.

A shaft of one loading gear, which integrally forms a pinion gear that meshes with the rack gear of the loading lever, is fixed to the chassis, and the other end of the loading lever has a long hole in the substantially same direction as the linear guide body. It is preferable that a straight guide body is used, the shaft is inserted through the straight guide body, and a stopper ring for retaining is attached to the tip of the shaft.

A pinion gear that meshes with the rack gear of the loading lever is integrally formed, and a step portion is formed in the loading gear by the height from the chassis of one loading gear, and the loading gear is connected to the loading gear via the pinion gear and the rack gear. It is preferable that one end of the loading lever is slidably supported on the chassis.

[0008]

【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) (3) and (4) standing on slide bodies (7) and (8) that slide and guide through rails (5) and (6). Tape loading pin for winding the tape of the above-mentioned tape on the cylinder (2), (10) and (11) supply and take-up reel shafts for supporting the tape reel of the cassette (9), and (12) an audio system. A head for inputting and outputting signals, (13) is an erasing head, (14) is a capstan, and (15) is 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).

Further, a cam mechanism (19) is arranged on the upper surface of the chassis (1) on the right side of the cylinder (2), and is provided with a disc-shaped cam body (20), 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 connected to the worm gear (26) at all times, and the cam body (20) is normally and reversely rotated by a motor (22). .

Further, a cassette loading / unloading lever (28) for swinging by the cam body (20) is provided, and the loading / unloading lever (28) is moved to 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 the cassette holder (16) 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 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 each of the slide bodies (7) (8). ) 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) can be swingably attached to the loading gear (37). Each arm (33) (34) is connected via (37), and the lever (31) is connected to one arm (34) via a pinion gear (38) and a rack gear (39), and the lever (31) is connected. ) Slides the tape loading pins (3) and (4) back and forth by guiding the rails (5) and (6) through the arms (33) and (34). 10) The tape of the cassette (9) supported by (11) is pulled out by the forward movement of each pin (3) (4) and wound around the cylinder (2), while the return movement of each pin (3) (4) is performed. The tape is then 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 clutch lever (48) is supported on the tension pulley (43) and the clutch gear (44) integrally with each other by key connection. It is configured as

Further, the forward / reverse rotation of the flywheel motor (40) causes the tension pulley (43) and the swing arm (45) to swing together 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 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) ( The mode lever (57) is attached to the upper surface of the chassis (1) through 59) so as to be slidable left and right.

Further, a linkage lever (60) for switching the mode lever (57) by the rotation of the cam body (20) is provided, and the middle of the lever (60) is attached to the chassis (1) via the 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) is slid back and forth, and the levers (48) (52) (53) (54) (55) are used for tape constant speed moving mode for recording and reproducing, tape fast forward mode, and tape rewinding mode. (56) is configured to be switched.

Further, as shown in FIGS. 1 and 6 to 8, the cam body (20) is rotatably supported by the support shaft (62) that fixes the upper end of the bracket (21), and The lower end of the cam floor pin (63) is caulked and fixed to one end of the ding lever (31), and the upper end side of the pin (63) is engaged with the tape loading cam groove (64) on the lower surface side of the cam body (20). The chassis (1) is formed with an elongated hole (65) extending in a radial direction around the support shaft (62), and the pin (63) supports the roller (66) so that the pin (63) is supported. The chassis (1) is sandwiched by the integrally formed flange portion (67) and the lever (31), and the pin (63) is inserted into the elongated hole (65) through the roller (66) to attach the chassis (1) to the chassis (1). Lever (31) One end slides on its own Support.

In addition, the middle of the lever (31) having an L shape in plan view is bent in a sliding direction of the lever (31) to form a step portion (68) having a crank shape in a side view, and the chassis (1). A long hole (69) extending substantially in the same direction as the long hole (65) is formed in the lever (31), and the right shaft (36) on the rear surface of the chassis (1) is inserted into the long hole (69). A lever (31) is slidably supported by a right shaft (36) via a stopper ring (70). The lever (31) and the loading gear (37) and the pinion gear (38) which are integrally formed are stopper rings. It is attached to the right shaft (36) by (70) and linearly reciprocally slidably guides and supports the lever (31) through the long holes (65) (69) which are linear guide bodies, and a cam By the normal and reverse rotation of the body (20), The bar (31) is reciprocally slid, and the loading pins (3) and (4) are reciprocally moved via the rails (5) and (6), so that the tape of the cassette (9) can be taken in and out.

Further, springs (71) and (71) are urged between the loading arms (33) and (34) and the loading gears (37) and (37) to reach the ends of the rails (5) and (6) on the tape pull-out side. The loading pins (3) and (4) are elastically supported by the springs (71) and (71), and the pins (3) and (4) are prevented from returning due to the tape tension wound around the cylinder (2). ing.

Further, as shown in FIG. 8, a left shaft (35) made of synthetic resin is integrally formed on the chassis (1) by an outsert molding process, and is provided inside the shaft core hole (72) of the left shaft (35). The ring-shaped ridge (73) is integrally formed, and the hook (75) is integrally formed inside the shaft hole (74) of the synthetic resin loading gear (37). When the shaft hole (74) of (37) is inserted and fitted, the hook (75) is inserted into the shaft core hole (72), the tip of the hook (75) engages with the ridge (73), and the left The gear (37) is rotatably supported on the shaft (35), and the hook (75) and the protrusion (73) are engaged with each other to prevent the gear (37) from falling off, and the protrusion (73). On the other hand, by removing the hook (75), the gear (37) can be removed from the left shaft (35). Is configured.

[0018]

As is apparent from the above embodiments, according to the present invention, the rack gear (39) of the tape loading lever (31) is attached to the loading gears (37) (37) that reciprocate the tape loading pins (3) (4). ) Is connected and the tape loading lever (31) is linearly reciprocally slidable on a tape deck which connects the tape loading lever (31) to a cam body (20) which is rotated by a loading motor (22). In a tape deck provided with linear guide bodies (65) (69) for guiding and supporting, a tape sliding surface with the chassis (1) is provided in the vicinity of a cam floor pin (63) provided on the tape loading lever (31). It is provided integrally with the lever (31) and is used for the tape loading lever (31) The sliding surface with the chassis (1) works to further stabilize the reciprocating sliding movement of the lever (31), and the lever (31) that moves linearly has the practical effect that the tape loading can be reliably performed. It plays.

Further, a cam follower pin (63) is fixed to a sliding surface of the loading lever (31) with the chassis (1), and a cam member (63) is fixed on a sliding contact surface of the loading lever (31) with the chassis (1). The long hole facing the center of rotation of 20) is used as one linear guide body (65), the cam floor pin (63) is inserted into the linear guide body (65), and the tip of the cam floor pin (63) is placed in the cam body (20). By engaging with the tape loading cam groove (64), the cam body (20) and the loading lever (31) can be interlocked more reliably.

Further, a shaft (36) of one loading gear (37) integrally forming a pinion gear (38) meshing with a rack gear (39) of the loading lever (31) is fixed to the chassis (1), At the other end of the lever (31), an elongated hole in substantially the same direction as the linear guide body (65) is used as the other linear guide body (69), and the shaft (36) is inserted into the linear guide body (69). By attaching the stopper stopper ring (70) to the tip of the shaft (36), the interlocking connection of the loading gears (37) (37) and the loading lever (31) can be performed more reliably.

A pinion gear (38) that meshes with the rack gear (39) of the loading lever (31) is integrally formed, and the one loading gear (37) is as high as the height from the chassis (1). ) Is formed with a stepped portion (68), and one end of a loading lever (31) which is connected to the loading gears (37) (37) via a pinion gear (38) and a rack gear (39) is slidably supported on the chassis (1). By doing so, the loading lever (31) can surely be connected to the cam bodies of different heights and the loading gears (37) (37), and the sliding surface that stabilizes the sliding operation of the loading lever (31). Can be properly provided.

[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 front view of a tape loading lever portion.

FIG. 7 is a partial view of the same.

FIG. 8 is an exploded view of the same.

[Explanation of symbols]

 (3) (4) Tape loading pin (20) Cam body (22) Loading motor (31) Tape loading lever (37) Loading gear (39) Rack gear (65) (69) Long hole (linear guide body)

Claims (4)

[Scope of utility model registration request] 1. A rack gear (39) of a tape loading lever (31) is connected to a loading gear (37) (37) for reciprocating a tape loading pin (3) (4), and is rotated by a loading motor (22). A linear guide body (65) (69) for guiding and supporting the tape loading lever (31) linearly and reciprocally slidably is provided on a tape deck which connects the tape loading lever (31) to the cam body (20). In the tape deck, a sliding surface with the chassis (1) is provided integrally with the tape loading lever (31) in the vicinity of a cam floor pin (63) provided on the tape loading lever (31). Tape deck. 2. A cam floor pin (63) is fixed to a sliding surface of the loading lever (31) with the chassis (1), and a cam body (20) is slidably contacted with the loading lever (31) of the chassis (1). ) Is used as one linear guide body (65), and the cam floor pin (63) is inserted into the linear guide body (65), and the tip of the cam floor pin (63) is tape-loaded to the cam body (20). 2. The cam groove (64) is engaged with the cam groove (64).
The listed tape deck. 3. A shaft (3) of one loading gear (37) integrally forming a pinion gear (38) meshing with a rack gear (39) of the loading lever (31).
6) is fixed to the chassis (1), and at the other end of the loading lever (31), a long hole in substantially the same direction as the linear guide body (65) is used as the other linear guide body (69), and the linear guide body (69) 69) and insert the shaft (36) into the shaft (36)
The tape deck according to claim 1, wherein a stopper ring (70) for preventing the tape from being attached is attached to the tip. 4. The loading gear (31) which is integrally formed with a pinion gear (38) which meshes with a rack gear (39) of the loading lever (31) by a height of one loading gear (37) from the chassis (1). A stepped portion (68) is formed on the loading gear (37) (3
2. The tape deck according to claim 1, wherein one end of a loading lever (31) connected to 7) via a pinion gear (38) and a rack gear (39) is slidably supported on the chassis (1).