KR870000444Y1 - Front loading device of video tape recorder - Google Patents

Abstract

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Description

Front Loading Unit of Video Tape Recorder

1 is a schematic overall side view of a videotape recorder in which the inventive device is installed.

FIG. 2 is a bottom view of a video tape recorder provided with the apparatus of the present invention, and FIG. 2 (a) is a diagram showing an operation state of loading and ejecting a tape cassette.

Figure 2 (b) is a state diagram of the action in the stop and play mode.

3 is an explanatory view showing the action of the cassette holder moved to the device of the present invention, Figure 3 (a) is a schematic enlarged side view of the cassette holder housing showing the state at the time of insertion and withdrawal of the tape cassette.

3 (b) is a schematic enlarged side view of a cassette holder housing showing a state where a tape cassette is mounted on a rail table.

Figure 4 is an enlarged perspective view showing the configuration of the idle gear and the movable piece that is the main part of the present invention.

Figure 5 is a side view of a cassette holder housing showing the configuration of a conventional front loading apparatus using an elevation motor.

* Explanation of symbols for main parts of the drawings

10: mainframe 11: flywheel

11a: drive shaft 11b: drive gear

13: Home Cam 14: Connecting Plate

14b: sliding piece 14c: inclined surface

15: driven gear 16: shaft

17: interlocking gear 17a: shaft

17b: Worm 18: Children's Gear

19: movable piece 19a: sliding piece

19b: hinge pin 20: cassette holder housing

21: guide 22: cassette holder

22a: Paper pin 23: Actuated gear

24: between operation

The present invention relates to a front-loading device of a video tape recorder, and more particularly, a video tape recorder capable of smoothly mounting and ejecting a tape cassette by moving a cassette holder using a driving force of a capstan motor. A front loading device.

As the tape cassette mounting method of the video tape recorder (hereinafter referred to as VTIAL) is gradually changed from the top loading method to the front loading method, various mounting apparatuses for mounting the cassette have been proposed and used. For example, a mechanical mounting device using a spring restoring force and a front loading device using an elevation motor are known. However, the mechanical mounting device described above has a simple configuration but is not easy to operate and inconvenient to use. Difficulties are caused, and the front loading device using the later elevation motor has an elevation motor 2 installed on one side wall of the cassette holder housing 1, as shown in FIG. As the rotor 2 is driven, the worm 2b fixed to the motor shaft 2a is rotated, and the worm 2b is rotated. The operating gears 3 installed on both side walls of the furnace housing 1 are rotated, so that the operating intervals 3a rotated together with the rotation of these operating gears 3 allow guide holes on both side walls of the housing 1 to be rotated. The cassette holder (4) installed in 1a) is configured to allow the cassette to be mounted and withdrawn by moving forward and backward. Such a conventional front loading device has a separate elevation motor for rotating the operating gear (3). The complicated configuration and operating structure in which (2) is fixed to one side wall of the housing (1) not only increases the manufacturing cost but also raises the elevation motor (2) protruding out of the housing (1). Due to the occupied space occupied by the space occupied the defect that the size of the entire product, ie VTI must be enlarged.

The present invention is devised to solve the above-mentioned defects of the front loading device, and instead of rotating the operation gear for the movement of the holder using a separate elevation motor, the operation gear and the existing capstan Several interlocking gears are installed between the drive shafts of the motors, and the idle gears engaged with the drive gears of the capstan motor drive shafts of these gears are slid to the well-known connecting plate, so as to convert the stop, eject, play or rewind modes. The power transmission between the gears is selectively made by the movement of the connecting connecting plate, thereby enabling the seating and ejecting of the cassette, which will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the flywheel 11 fixed to the drive shaft 11a of the capstan motor is exposed at one side of the bottom of the main frame 10, and the loading motor 12 is exposed at the other side thereof. A groove cam 13 interlocked with the driving of the coupling member is installed, and the operation pin 14a at one end of the connecting plate 14 is fitted into the guide groove 13a on the vortex formed in the upper surface of the groove cam 13 so that the guide groove 13 According to the shape of (13a), the connecting plate 14 is moved left and right to enable the required mode conversion, while both side walls of the cassette holder housing 20 installed on the upper part of the main frame 10. In the " &Quot; shaped guide holes 21 are installed to correspond to each other, and guide pins 22a formed at both ends of the cassette holder 22 are inserted into the guide holes 21, and the guide holes 21 are In the operation gear 23 adhered to both side walls of the housing 20, which is the lower side, the operation shaft 24 in which the long hole 24a is formed is fixed on the same shaft 23a, and the long hole of the operation shaft 24 ( 24a) is inserted between the two pins 22a of the cassette holder 22 which is outgoing through the guide hole 21, and the operation period 24 which rotates together in accordance with the rotation of the operating gear 23 is the cassette. Holder (22) In the frontal loading device of VTIAL, which is moved forward, rearward, or up and down along the snow direction of the female guide hole 21, the capstan motor driving shaft 11a extends below the flywheel 11, The drive gear 11b is inserted into the lower end of the drive gear, and on the one side of the bottom surface of the main frame 10, which is the outer part of the flywheel 11, the gear gear 15 is brought into contact with the driven gear 15 by the shaft pin 15a. While maintaining a constant distance between the gear (11b), while the one side peripheral surface of the main frame 10, which is the outer side of the driven gear 15, the bearing shaft (1) protrudes and the shaft bar adhered to the bearing member (16) The interlocking gear 17 meshed with the driven gear 15 is fixed to the driving gear 11b and the driven gear 15 which are installed at a predetermined distance from each other. At the same time, the idle gear 18 is engaged, but the shaft pin 18a of the idle gear 18 is shown in FIG. As shown, the sliding pins 19a and the hinge pins 19b adhere to one side edge portion of the triangular movable piece 19 vertically placed on both edge portions thereof, and the hinge pin 19b on one side thereof is the bottom surface of the main frame 10. One side end of the connecting plate 14 installed in front of the flywheel 11, that is, the other side of the sliding pin 190 to be adhered to the inner side is fitted into the guide groove (13a) On the opposite end of the actuating pin 14a, the connecting flight 14 is brought into contact with the inclined surface 14c of the sliding piece 14b formed integrally with the connecting flight 14, thereby rotating the groove cam 13. According to the left and right movement, the sliding pin 19a which is in contact with the inclined surface 44c is moved up and down along the inclined direction so that the idle gear 18 on one side of the movable piece 19 moves the drive gear 11b and the driven gear. The interlocking gear 17 extends up the shaft bar 17a of the fixed shaft piece 16, and the shaft The worm 17b is fixed to the upper end of the 17a so that the worm 17b is engaged with one side of the operation gear 23 adhered to one side wall of the cassette holder Hanazing 20. Reference numeral 19c denotes a coil spring for arranging the movable piece 19 adhered to the hinge pin 19b inward, 19d is a stopper for stopping the rotation of the movable piece 19, and 25 is a rotational force of one side operation gear 24. To the operating gear (not shown) on the other side of the housing 20 so that both operating gears 24 rotate at the same time, 30 is a magnetic rotating drum, 31 is a rotary table 32 for rotating. Drive motor, 26 is the tape cassette, 27 is the opening and closing door of the cassette 26, 28 is a sensing switch operated according to the insertion of the tape cassette 26, and 12a, 34, 35, 36 is a loading motor ( 12) pulleys and interlocking gears for rotating the home cam 13 to be linked according to the driving of the It will be shown.

Effects of the present invention configured as described above are as follows.

2 (a), 3 (a), and 3 (b) are schematic bottom and partial side views of VTial for showing the function of the present invention in the process of inserting or ejecting a cassette. At this time, the function mode of the VTIAL is an ejection door, and the operation pin 14a of the connecting plate 14 is guided on the outer ring by the guide action of the home cam 13 rotated by the loading motor 12. 13a) is located on the inner end of the connecting plate 14 is moved to the right side, the sliding pin 19a on one side of the movable piece 19 to which the idle gear 18 is bonded is the sliding plate 14 sliding piece The movable piece 19 adhered to the upper outer side of the inclined surface 14c of the inclined surface 14c rotates in the clockwise direction so that the idle gear 18 adhered to the driving gear 11b is connected to the driving gear 11b. It is engaged between the driven gears 15, and both the operating gears 23 of the cassette holder housing 20 are half It is rotated in the direction between the leading end of the operation (24) for rotation with it. " The ruler pin 22a of the cassette holder 22, which is located at the front end of the female guide hole 21 and inserted into the long hole 24a of the operation period 24, is also in the same position, so that the cassette holder ( 22 is located inside the front cassette input passage of the cassette holder housing 20, and the cassette 26 is inserted into the cassette holder 22 for mounting the tape cassette 26 in the above state. When the rear surface of the tape cassette 26 is inserted, the capstone drive shaft 11a and the flywheel 11 are driven by operating a known sensing switch 28 installed on the bottom of the input passage of the housing 20. Accordingly, since the driving gear 11b fixed to the lower end of the drive shaft 11a is rotated together, the idle gear 18 engaged thereto rotates to interlock the driven gear 15 and the interlocking gear 17 sequentially. Therefore, the shaft gear 17a of the interlocking gear 17 Rotate the dignity 17b to rotate the operating gear 23 engaged with the worm 17b in the direction of the arrow, and the transmission gear 25 interlocked therewith rotates the operating gear of the other side wall of the housing 20 in the same direction. Thus, the operation section 24 that rotates together with both of the operation gears 23 rotates together with the freezing pin 22a of the cassette holder 22 fitted to the front end of the guide hole 21. ) Parallelly move the guide pin 22a of the cassette holder 22 fitted to the front end of the guide hole 21 to the rear side of the guide hole 21, and then move downward again along the shape of the guide hole 21. Since the cassette holder 22 and the tape cassette 26 mounted on the holder 22 are moved to the upper part of the main frame 10 as shown in FIG. 3 (b), the main frame ( It is to be seated on the rail table 32 protruding from the upper surface of 10).

In this way, when the mounting of the tape cassette 26 is completed, the rotation of the flywheel 11 of the capstan drive shaft 11a and its drive gear 11b is stopped by a known detection switch (not shown in the figure) informing the seating. The position of the operation pin 14a fitted to the guide groove 13a is changed due to the rotation of the groove cap 13 due to the rotation of the loading motor 12, as shown in FIG. 2 (b). Since the contact plate 14 is moved in the left direction as described above, the inclined surface of the sliding pin 19a supported on the upper end of the sliding piece 14b is elastically supported by the coil spring 19c on which the movable piece 19 is supported. Moving downward along 14c, the idle gear 18 engaged with the drive gear 11b and the driven gear 15 as described above is separated from these gears 11b and 15, and the movable piece rotated in this way ( 19 is stopped by the stopper 19d so that the drive gear 11b, the driven gear 15, and Between the lift control (18) maintains a constant distance.

This state corresponds to the stop mode before or after VTIAL's functional mode is switched to fast forward and rewind (F, F / REW), cue and play mode. When the functional mode of VTIAL is switched to the eject mode to take out the tape cassette 26 seated on the yarn rail table 32, the home cam 13 is driven by reverse driving of the loading motor 12. It rotates in the opposite direction and moves the connecting plate 14 linked thereto to the right side again, and the sliding pin 19a of the movable piece 19 in contact with the lower side of the inclined surface 14c is inclined surface 14c thereof. Since it moves upward along the inclined direction of, the idle gear 18 adhered to one side of the movable piece 19 is in a state before insertion of the tape cassette 26, that is, in a state of FIG. 2 (a). Rotate to drive the idle gear 18 Gear 11b, (18), (15), (17), (10) by engaging the gear (11b) and the driven gear (15) and at the same time by the reverse rotation of the capstan motor drive shaft (11a). 17b) is rotated in the opposite direction when the tape cassette 26 is seated, so that the operating gear 23 engaged with the worm 17b is rotated counterclockwise so that the seated cassette holder 22 and the tape cassette are seated. By restoring (26) to the state as shown in FIG. 3 (a), the eject of the tape cassette 26 can be written.

The front loading device of the present invention having the configuration and operation as described above functions a smooth mounting and ejection of a tape cassette by a simple power transmission device using a conventional capstan motor without using a separate driving device such as an elevation motor. By doing so, it is possible to reduce manufacturing costs and improve productivity, as well as to reduce the size of the entire product.

Claims (1)

On the front side of the bottom of the main frame 10, a connecting plate 14 which is moved to the left and right according to the rotation of the home cam 13 is installed at a predetermined distance from the flywheel 11 fixed to the capstan drive shaft 11a, and the cassette The video tape to which both the rubbing pins 22a of the cassette holder 22 passed through the guide hole 21 are adhered between the operation periods 24 of the operation gears 23 provided on both side walls of the holder housing 20. In the front loading device of the recorder, the drive gear 11b is fixed to the lower end of the capstan drive shaft 11 so as to maintain a constant distance from the driven gear 15 provided at the outer side thereof, The worm gear 17b and the interlocking gear 17 engaged with the actuating gear 23 and the driven gear 15 are respectively processed on the upper and lower ends of the shaft bar 17a adhered to the bearing piece 16. The main piece is provided with the movable piece 19 provided with the idle gear 18 which can be engaged with 11b and the driven gear 15 together. The hinge pin 19b is attached to one side of the bottom of the bottom surface 10 so as to be elastically installed by the coil spring 19c, and the rotation of the movable piece 19 is stopped at the bottom of the main frame 10 on one side of the movable piece 19. The stopper 19d is provided, and the other side of the movable piece 19 has a sliding pin 19a in contact with the inclined surface 14c of the sliding plate 14b. Front loading device for video tape recorders.