JPS63244359A - Cassette loader - Google Patents

Abstract

PURPOSE:To check the movement of a cassette holder to its loading position by providing a locking means so as to check the movement of the cassette holder and effecting locking motion with the locking means being engaged with the cassette holder in two stages. CONSTITUTION:The pins 17, 18 formed on both side plates of a cassette holder 16 are made to fit to these guide grooves 13, 15 and the front loading of a tape cassette is thus enabled. A lock lever 20 is fitted to the right side frame 11 and made to engage with the part to be locked of the cassette holder 16. Two step parts 21, 22 are formed on the right side side-late of the cassette holder 16, forming the part to be locked. The lock lever 20 is made to engage with the step parts 21, 22 of the cassette holder 16 and the cassette holder 16 being moved to loading position in the state of holding no tape cassette 60 is thus prevented.

Description

[Detailed description of the invention]

FIELD OF THE INVENTION The present invention relates to a cassette loading device that loads a tape cassette by inserting the tape cassette into a cassette holder and moving the cassette holder to a loading position. The present invention relates to a device suitable for use in a front-loading type cassette mounting device. KSummary of the Invention The present invention provides a front loading type cassette mounting device in which a drive mechanism for moving the cassette holder provides a buffer, in which the cassette holder is locked in two stages and the tape cassette is inserted. When the tape cassette is removed after the first stage lock is released, the second stage locking operation prevents only the cassette holder from moving to the mounting position thereafter, This prevents loading of only the cassette holder. [Prior Art] In a front-loading VTR, a tape cassette is inserted into a cassette holder through an opening formed on the front side of a cabinet, and the tape cassette is moved to a predetermined mounting position by moving the cassette holder. I try to attach it to. Then, the magnetic tape is pulled out from inside the casing of the tape cassette and wound around the head drum, and the rotating head provided on the head drum performs helical scan recording and/or recording.
Or playback is set to take place. [Problems to be Solved by the Invention K] According to such a front-loading type cassette loading device, when a tape cassette is manually inserted and moved together with the cassette holder, the cassette holder is first unlocked. Become. When the tape cassette is pushed in roughly, the insertion of the tape cassette is detected at a predetermined position.Based on this detection, the drive mechanism is activated to move the cassette holder to the predetermined mounting position. The tape cassette is installed. However, if the tape cassette is removed after the cassette holder is unlocked but before it is detected by the switch, the cassette holder will be left in an unlocked and unstable state. Conventionally, the cassette holder is urged in the backward direction by a spring, and when the drive mechanism is not operated, the spring automatically returns the tape cassette to a position where the tape cassette can be inserted. However, if the cassette holder drive mechanism also serves as a buffer mechanism, such a spring is not provided, and the cassette holder will not return to the insertion position. Therefore, if the cassette holder is subjected to a force in the forward movement direction in an unstable position where it is not locked, only the cassette holder will move toward the mounting position. The present invention has been made in view of these problems, and provides a cassette mounting device that prevents the tape cassette from being moved to the mounting position without holding it in an unstable state where the cassette holder is not locked. The purpose is to

[Means to solve the problem]

The present invention provides an apparatus in which a tape cassette is inserted into a cassette holder and the tape cassette is mounted by moving the cassette holder to a mounting position, in which a locking means is provided to prevent movement of the cassette holder. In addition, the locking means engages with the cassette holder in two stages to perform a locking operation. Therefore, according to the present invention, even if the tape cassette is taken out from the cassette holder after the first stage lock is released, the second stage is locked by the locking means, and thereby the cassette holder is locked. Movement to the mounting position will be prevented.

【Example】

The drawing shows a front-loading type cassette mounting device for a VTR according to an embodiment of the present invention, and as shown in FIGS. 2 and 3, this cassette mounting device is connected by a connecting plate 10. A pair of frames 11.
It has 12. As shown in FIG. 2, three guide grooves 13, 14, and 15 are formed in the left frame 12 in an inverted shape. On the other hand, a pair of upper and lower guide grooves 13.15 are formed in the right frame 11. Bins 17.18 formed on the side plates of the cassette holder 16 are adapted to be received in these guide grooves 13.15, thereby allowing front loading of the tape cassette. A lock lever 20 is attached to the right frame 11 and engages with a locked portion of the cassette holder 16. In this embodiment, as shown in FIGS. 1 and 7, two stepped portions 21 and 22 are formed on the right side plate of the cassette holder 16, and these constitute a locked portion. . Also, the cassette holder 16
As shown in FIG. 2, pressing levers 23 are attached to the side plates on both sides of the holder, and pressing rubber 24 is attached to the levers 23. Release ribs 25 for releasing the suppression lever 23 are provided on the frames 11 and 12 on both sides. Also, a shirt flap plate 26 is provided at the insertion position of the cassette holder 16.
is provided and is opened and closed by an opening/closing lever 27 attached to the side surface of the frame 11. Furthermore, an operating plate 28 is rotatably supported on the right side plate of the cassette holder 16 via a bin 29, and when a tape cassette is installed, the cassette lid is opened. Next, the drive mechanism for moving the cassette holder 16 to the mounting position, that is, the lowering position, will be explained. This drive mechanism is equipped with a drive motor 32 and is supported by the right frame 11 via a bracket 33. There is. A worm 34 is fixed to the output shaft of this motor 32 and meshes with a worm gear 35. As shown in FIG. 5, a spur gear 3 is provided on the inner side of the worm gear 35.
6 is integrally formed and rotatably supported by the frame 11 by a support shaft 37. A segment gear 39 is rotatably supported on another support shaft 38 provided on the frame 11, and this gear 39 meshes with the spur gear 36. The rough segment gear 39 is integrally equipped with a small segment gear 40. The small segment gear 40 meshes with the drive gear 43. As shown in FIG. 2, the drive gear 43 is integrally connected with another drive gear 44, and connected to a drive gear 46 provided on the outer surface of the frame 12 on the opposite side via a connecting shaft 45. are connected (see Figure 6). The drive gears 44, 46 are adapted to mesh with a push gear 47 mounted on the outer surface of the frame 11, 12. Note that this gear 47 is supported by the support shaft 38 mentioned above. The pressing gear 47 also includes an arm 48, which receives the bin 18 of the cassette boulder 16 through its opening 49, as shown in FIGS. 5 and 6. Furthermore, the drive gear 47 has a built-in coil spring 50. A switch lever 52 is disposed on the side of the pressing gear 47, and this lever 52 is adapted to press a leaf switch that detects attachment of a cassette. Further, a pressed arm 56 is integrally formed with the segment gear 39, and this pressed arm 56 is pressed by an operating portion 57 formed on the inner side surface of the worm gear 35. In the above configuration, when a tape cassette is inserted from the front into the cassette holder 16 in the raised position, pushing aside the shirt flap plate 26, the lock lever 20 is pushed up by the cassette lid portion on the tip side of the tape cassette. The cassette holder 16 is disengaged from the first stepped portion 21 . As a result, the cassette holder 16 is unlocked. The cassette holder 16 is then moved by a manual push through the tape cassette. At this time, the tape cassette is pressed against the cassette boulder 16 by the pressing rubber 24 of the pressing lever 23. As shown in FIGS.
is sandwiched by. Therefore, the lock lever 20 is connected to the first step 21 and the second step 2 of the cassette holder 16.
2. This lock lever 20 further prevents the tape cassette 60 from being inserted incorrectly.
When the tape cassette 60 is inserted from the opposite direction, the vertical surface 62 of the tape cassette 60 comes into contact with the lock lever 20 to prevent further insertion of the tape cassette 60, as shown in FIG. 1A. On the other hand, when the tape cassette 60 is inserted in the correct direction, the inclined surface 61 formed on the cassette lid on the front side moves the lock lever 20 as shown in FIG. Pushing up against the restoring force, the tape cassette 60
This will allow correct insertion of . Furthermore, the locking lever 20 is adapted to engage with two steps 21, 22 of the cassette holder 16, thereby preventing the cassette holder 16 from being moved to the mounting position without holding the tape cassette 60. That's what I do. Before the tape cassette 60 is inserted into the cassette holder 16, the lock lever 20 is in the position shown in FIG.
As shown in FIG. 2 , it engages with the first step 21 of the cassette holder 16, thereby preventing the cassette holder 16 from moving. When the tape cassette is correctly inserted from this state as shown in FIG. 1B, the lock lever 20 is unlocked by the slope 61 as described above, and the cassette holder 16 moves to the right together with the tape cassette 60. Thereafter, insertion of the tape cassette 60 is detected by a switch, but if the tape cassette 60 is pulled out before detection by this switch, an unstable state will occur in which the cassette holder 16 is not locked. However, in this VTR, in such a case, the lock lever 20 engages with the second step 22 of the cassette holder 16 to lock the cassette holder 16. Therefore, the cassette holder 16 is prevented from moving independently to the mounting position without receiving the tape cassette 60. Therefore, there is no need for a spring for biasing the cassette holder 16 to the backward movement position, thereby making it possible to reduce the number of parts. When the cassette holder 16 moves to the right in FIGS. 4 and 5, the pins 18 provided on both sides of the cassette holder 16 also move in the same direction. Pressure gear 47 with Cl49 will be rotated. The rotation of this gear 47 is the gear 44.4.
6.43, small segment gear 40, segment gear 39
, spur gear 36, worm gear 35, and worm 34 in this order. Since the worm 34 meshing with the worm gear 35 has three threads and its advance angle is large, the worm 34 is rotated by the worm gear 35. Therefore, the motor 32 is rotated at high speed, and the torque loss of the motor 32 provides a buffering operation at the beginning of insertion of the tape cassette. When the tape cassette is inserted slightly to the right in FIGS. 4 and 5, a cam formed on the inner surface of the pressing gear 47 pushes the switch lever 52 to rotate it. This lever 52 then pushes a leaf switch (not shown), thereby turning on the switch. Then, the motor 32 is energized, and thereafter the tape cassette is loaded by the motor 32 and is mounted at the mounting position. That is, the rotation of the motor 32 is caused by a worm 34, a worm gear 35, a spur gear 36, a segment gear 39, a small segment gear 40, and a drive gear 43.
．． 44 and 46 to the pressing gear 47. Therefore, the pressing gear 47 is connected to the support shaft 38 in FIGS. 4 and 5.
rotated clockwise around the center. Therefore, this gear 4
The pin 18, which engages with the opening 49 formed in the arm 48 of the frame 11.1, will be pushed to the right.
It will move along the guide groove 15 of No. 2. The guide grooves 13 to 15 are each formed in an inverted shape, and each of the guide grooves 13 to 15 has a perpendicular end. Therefore, when the cassette holder 16 is moved to the right by a predetermined stroke, the cassette holder 16
It will then be lowered and moved to a predetermined mounting position. In this way, at the final stage of the loading operation in which the cassette holder 16 is moved to a predetermined mounting position, the spur gear 36 of the worm gear 35 and the segment gear 39 are disengaged. The operating portion 57 formed on the inner surface of the worm gear 35 pushes the pressed arm 56 of the segment gear 39 to rotate the gear 47 clockwise about the support shaft 38. When the tape cassette is completely moved to the mounting position, the coil springs 50 built into the pressing gears 47 on both sides press against the bin 18 of the cassette holder 16.
This allows the cassette holder 16 to be pressed down.
will be pressed elastically. At this point, the segment gear 39 and the worm gear 35 are respectively located at arrows 58.5 and 58.5 in FIG.
9, the pressed arm 56 of the segment gear 39 is pushed by the operating portion 57 of the worm gear 35. That is, the operating portion 57 of the worm gear 35 is the pressing gear 47.
Thus, the cassette holder 16 is locked. That is, the relationship between the actuating portion 57 and the pressed arm 56 is as follows.
The positional relationship is such that the actuating portion 57 cannot be rotated. Once the tape cassette is installed in the predetermined mounting position and recording and/or playback operations are performed in this way,
After this, the tape cassette will be removed. The unloading operation for taking out the tape cassette is performed by rotating the drive mechanism by the motor 32 in the opposite direction to the above operation. That is, the motor 32 drives the worm 34, worm gear 35, spur gear 36, segment gear 39, small segment gear 40 . Drive gear 43.
44, 46, and the pressing gear 47, this gear 4
The arm 48 of No. 7 pushes the bottle 18 to move the cassette holder 16 in the opposite direction along the guide grooves 13 to 15. Note that the shirt flap plate 26 is opened via the opening/closing lever 27 by a cam provided on the drive gear 44. At the final stage of unloading, the pressing levers 23 provided on both sides of the cassette holder 16 are released by the release ribs 25, and the tape cassette is released from the cassette holder 16. And these loading and unloading operations are
Due to the connection shaft 45, the left and right operations are performed simultaneously by the suppression gears 47 on both sides, and smooth loading and unloading of the cassette can be achieved. K Effects of the Invention I As described above, the present invention is provided with a locking means to prevent the movement of the cassette holder, and the locking means engages with the cassette holder in two stages to perform a locking operation. be. Therefore, according to this structure,
Even if the tape cassette is moved away from the cassette holder after the first stage lock is released, the cassette holder will be prevented from moving forward by the second stage lock by the locking means, and the cassette holder will remain in the mounting position independently. This will prevent you from being moved. Furthermore, the two-step locking of the cassette holder eliminates the need to bias the cassette holder to the backward movement position.

[Brief explanation of the drawing]

Figures 1A to C are side views of the main parts showing the locking operation of the cassette holder, Figure 2 is an exploded perspective view showing the overall structure, Figure 3 is a plan view of the same, Figure 4 is a right side view of the cassette holder, Figure 5 is a right side view with the cover removed, Figure 6 is an overall left side view, and Figure 7 is a left side view of the entire body.
The figure is an enlarged side view of the cassette holder. In addition, in the symbols used in the drawings, 16... Cassette holder 20... Lock lever 21... First step 22... Second step 60... Tape cassette 61... Inclined surface 62... Vertical surface 63... Elastic piece.

Claims (1)

[Claims] Insert the tape cassette into the cassette holder and
In the apparatus in which a tape cassette is mounted by moving the cassette holder to a mounting position, a locking means is provided to prevent movement of the cassette holder, and the locking means is connected to the cassette holder in two stages. A cassette mounting device characterized in that it engages and performs a locking operation.