JPS59112458A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To realize a cassette holder of a complete correct standing transparent type even if a VHS type cassette is used, by constituting so that a shutter for preventing the inside of a device from being seen from the outside in the first state is opened through a connecting lever, on the way going to the second state from the first state. CONSTITUTION:In a state that a cassette holder 16 is raised a little to the right side, a cassette 15 is inserted from a holder inlet 16a. In this state, a cassette loading motor 30 is driven, and immediately before the cassette 15 becomes almost horizontal, a tip 41c of a connecting lever 41 contacts with a shutter 42, and the shutter 42 for preventing the inside of a device from being seen from the outside is pushed up along a guide groove 29c. As the rotation of the cassette loading motor 30 is continued, the connecting lever 41 moves the shutter 42, and at the same time, the cassette 15 becomes the second state that the opening part is positioned at the upper part, and the cassette loading is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording/reproducing apparatus having a cassette holder that allows a cassette to be seen through the cassette in an upright position.

Conventional structure and its problems Traditionally, for example, a cassette for an S-type VTR has an opening for loading a tape and a guard panel to shield it, and is inserted into a magnetic recording/reproducing device through the opening. When designing a deck that allows the cassette to be placed upright using a cassette designed in this way, most of the decks were equipped with a so-called kangal pocket-like cassette holder as shown in Figure 1. . In this case, for example, in the case of the S-type cassette mentioned above, all the letters, designs, labels, etc. written on the cassette will be upside down.
Not only was it difficult to see, but it significantly degraded the quality of the product. In FIG. 1, (1) is the main body of the magnetic recording/reproducing apparatus, (2) is the cassette holder, and the cassette (3), which is visible through the transparent part in the ejected state, can now be taken out.

(4) is a push button for operation, and (5) is a handle rotatable around a fulcrum (5a).

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to make it possible to realize a completely erect transparent type cassette holder even when using, for example, an S-type cassette as described above. .

Structure of the Invention In order to achieve the above object, the magnetic recording/reproducing device of the present invention has an opening for storing a magnetic tape therein and pulling out the magnetic tape, and a guard panel for shielding the opening. , a magnetic recording and reproducing device using a cassette made to be inserted into the magnetic recording and reproducing device from the guard panel side, wherein the cassette is in a first state where the front side thereof is slightly raised from a horizontal state and the cassette is in the guard panel side. The panel is configured to open and transition to a second state in which the opening is located at the top, and is configured to record and reproduce signals in this second state, and in the first state, the inside of the device is viewed from the outside. A shutter that prevents the shutter from being seen, a guide groove that guides the shutter, and a connecting lever that is provided to abut the shutter and open the shutter on the way from the first state to the second state. It is something to do.

DESCRIPTION OF EMBODIMENTS Hereinafter, one embodiment of the present invention will be described with reference to the drawings (Fig. 2 to 6).
The explanation will be based on Figure).

In FIG. 2, the deck On has a power switch α→ and an eject switch α→ on the right side when viewed from the front, and a cassette 00, which can be seen standing upright, is set in a predetermined position inside the cassette holder σ. Also, on the deck Oq, a tape counter 0◇ and an operation push button 0 are located on the left side when looking from the front. FIG. 8 shows the arrangement of the main parts viewed from the front. In the state shown in FIG. 8, the magnetic tape (9) has been pulled out from the cassette αG, and the supply reel (t5a)
The erase head 0η, rotating head cylinder (g), inclined guide post 0su, roller guide postdog), audio control head Q1) on the head base (21a), roller guide post (
A), the tape reaches the inclined guide post), passes through a driving capstan (C), a pinch roller (C), passes through the guide post (E), and is wound onto a take-up reel (15b). The rotary head cylinder frame is installed inclined by approximately the lead angle so that the magnetic tape (9) pulled out from the cassette 00 is wound around the rotary head cylinder (g) while remaining approximately horizontal. Guide post (c)
Before the magnetic tape (9) is pulled out from the cassette 0υ, the tops are located at the openings (15C) (t5d) of the cassette 0$, respectively.

Loading ring) has rotating head cylinder 08)
The magnetic tape (9) is rotatably arranged with an inclination of approximately twice the lead angle in the vicinity where the magnetic tape (9) is separated from the magnetic tape (9), and is connected to a ring drive means (not shown) such as a DC motor. The magnetic tape (9) coming out of the rotating head cylinder (c) wraps around the fixed inclined guide post Ql.
Loading ring (a) with the tilt slightly corrected
It is U-turned by the upper roller guide post (E),
It comes into contact with the audio control head Q◇ installed on the head base (21a) which is slightly inclined from the installation surface of the cassette (c). Next, the magnetic tape (9) wound around the roller guide post (material) connected by the loading ring (a) and the connecting means (not shown) is slightly wound around the fixed inclined guide post (not shown), so that the magnetic tape (9) can be attached to the cassette. α Pinch roller (c) whose height, direction, twist, etc. are corrected so that it can be inserted evenly and almost horizontally, and which is connected by a loading ring (goods) and a connecting means (shown)
The magnetic tape (9) is pulled out horizontally from the cassette, passes through a capstan (C) that stands approximately perpendicular to the installation surface of the cassette, and then passes through a guide post (C) (Incorporated).
) is horizontally wound into a cassette of 0υ.

Next, the loading operation will be described. When the cassette 0υ is installed in a predetermined position, the guide post (E) is inserted into the opening (15C) (15d) of the cassette aυ. When a loading instruction is given, the guide post (E) follows the guide groove (not shown) to reach the predetermined position on the 8th fixed side, and the guide post (C) moves along the guide (m) (not shown). (on the guide post) to reach the right position. Then, the loading ring (A) rotates counterclockwise, and the roller guide post (A), which has a tapered tip, enters the magnetic tape loop formed by the guide post (A) from below, and then the roller guide post (A). (A) and the pinch roller (C) enter the loop. When loading is completed, the roller guide post (A) is fixed on the loading ring (C) as shown in Figure 8, but the roller guide post (A) is connected to the loading ring (B) by a connecting means (not shown). While connected, they are positioned outside the outer periphery of the loading ring (c) by positioning means (not shown). The pinch roller (c) is a lever (not shown) that can rotate freely around the loading ring quadruple fulcrum pin (not shown).
The pinch roller (C) and the capstan (C) are pressed together by pressing the lever provided on the top with a pressing means (not shown), and this series of operations makes it possible to record and reproduce signals. ing.

Next, the configuration of the cassette loading device will be described based on FIG. FIG. 4 shows the cassette loading device from the side. In this state, the user can freely insert and remove the cassette a0. (A) is a guide base to which the cassette loading motor (7) is attached via the mounting base (80a). This guide base has a drive gear 0) rotatable around the support shaft (81a), a drive gear rotatable around the support shaft (82a), and a cam gear rotatable around the support shaft (gaa). A gear group such as (G) is arranged. In these gear groups, the worm gear ■ attached to the rotating shaft of the cassette loading motor (in the cassette loading motor) and the worm wheel part of the drive gear Op mesh with each other, and the spur gear part of the drive gear 0υ, the drive gear (2), and the drive gear ) and ) are connected to the cam gear. (To)
is the drive lever. This drive lever (c) is connected to the support shaft (8
5a), and the drive pin (85b) installed in the drive lever (to) is connected to the cam groove formed in the cam gear (to) which is rotatable about the support shaft (88a). (
88b). This cam groove (88b) is formed within an effective rotation angle range of about 150°, and the drive bin (s+sb) is inserted into the part closest to the rotation center of the cam gear (in Fig. 4), and the cam gear When the shaft rotates clockwise, the cam groove (88b) remains concentrically around the support shaft (88a) for a while, and then moves toward the outer circumference. The tip of the drive lever has a long hole (85c), which engages with a roller (86c) at one end of the drive lever. The drive lever (to) is rotatable around the support shaft (86b). In addition to the drive lever (to), there is also a cassette holder 0.
A lever with approximately the same shape as the drive lever (to) is placed between
(not shown) is provided integrally with the drive lever (to). The roller (86c) of the drive lever (2) is
(to) is provided so as to protrude from both sides of the guide base, and engages with the arcuate groove (29a) of the guide base. In FIG. 4, the cassette holder a is in a state that is slightly lifted to the right, so that the cassette 0→ can be slid in from the holder base (16a) with a light force. (To) is a cassette holding lever provided in the cassette holder 〇n, which is rotatable around the support shaft (88b), and is biased counterclockwise by a tension spring holder to hold the cassette in the fixed bin (To). are in contact. (88c) is a cylindrical boss portion at one end of the cassette holding lever (to), and is engaged with a long hole portion (41b) at one end of the connecting lever θη. The connecting lever 01) is rotatable around the support shaft (4ia). Connection lever θ]) other end (41c)
is not in contact with the shutter (6) in the state shown in FIG. 4, but as the cassette loading motor (to) is driven, it comes into contact with the shutter θ just before the cassette 00 becomes approximately horizontal. cassette holder r
JQ is provided with roller support shafts (16b) (16c). In FIG. 4, a cassette stopper (not shown) is provided in the cassette holder oQ to prevent the cassette (g) from entering further into the cassette holder Q→ (to the left in the figure). cassette holder qQ
The roller support shaft (16c) is connected to the elongated hole (16c) of the drive lever (G).
86a), and the roller support shaft (16b) is engaged with the elongated hole (48a) of the drive lever (goods), which is integral with the drive gear and can be rotated around the support shaft (S2a). It matches.

The roller support shaft (16b) also engages with a guide groove (29b) formed in the guide base ridge. The roller support shaft (16b) passes through a position where it slightly interferes with the drive gear 6'4 in the middle of the guide groove (29b), but there is no problem because a sufficient gap is secured in the mutual thickness direction. (29
C) is a guide groove formed in fourfold in the guide base, and is for guiding the shutter (6). (to the shutter) can be slid from the left to the lower right in the drawing along the guide groove (29c). The shutter 0 itself will not be described in detail, but it has a blind-like structure and prevents the inside of the device from being seen from the outside in the state shown in FIG. 4. There is a spring hook at one end of the shutter (6), and the tension spring () engaged with the spring hook causes the shutter (6) to move approximately clockwise in the guide groove (
29C).

Next, the operation of the cassette holder OQ will be described.

In FIG. 4, when the cassette loading motor rotates, the worm gear on the motor shaft rotates. As a result, the drive gear 0 connected to the worm gear (b)
The worm wheel section 'D rotates clockwise around the support shaft (8ta). This rotation is transmitted from the spur gear portion of the drive gear 0◇ to the drive gear (A), and the drive gear (To) rotates counterclockwise around the support shaft (82a). This rotation is transmitted to the roller support shaft (16b) of the cassette holder O by a drive lever integrated with the drive gear (drive gear), and the roller support shaft (16b) begins to rise along the guide. On the other hand, the rotation of the drive gear 6a is also transmitted to the cam gear (to) that rotates around the support shaft (88a), and the cam gear)
88a) in a clockwise direction. Cam gear (to)
The drive pin (85b) is inserted into the cam groove (88b) formed in the cam groove (88b).
) and is rotatable around the support shaft (85a), the drive lever (to) is rotated by the cam gear (to) to rotate the cam groove (88b).
) in a clockwise direction. This movement is transmitted to the roller (86c) on the drive lever (to) through the long hole (85C) of the drive lever (to), and thereby the drive lever (to) is transmitted to the roller (86c) on the drive lever (to).
(to) can rotate counterclockwise around a support shaft (86b). When the cam gear (G) starts to rotate clockwise, the cam groove (88b) will remain on the support shaft (88b) for a while.
8a), the cassette holder ae moves almost only by the cam groove (29b), and the front part of the cassette 0Q moves so as to be lifted. At this time, the other end (41c) of the connecting lever 01) comes into contact with the shutter (6) biased by the tension spring (c), and when the cassette holder 〇Q becomes horizontal, the connecting lever θ
The counterclockwise movement of 1) is transmitted from the long hole (4th) to the boss part (88C) of the cassette holding lever (to), and the cassette holding lever (to) is moved by the tension spring (to) around the support shaft (88b). (to) and rotates clockwise, the tip (38a) contacts the rear side of the cassette 0 o'clock and holds the cassette 01 even when the entire cassette holder C1l begins to rotate clockwise. However, it is designed to prevent it from slipping out of the cassette holder. As the rotation of the cassette loading motor (1) continues, the connecting lever <4]) continues to push up the shutter θ, and the cassette Qe moves from (A) to (C) as shown in FIG.

Finally, the reel stand θ on the chassis is reached.
The cassette is then attached to the cassette support post and the cassette loading operation is completed.

Figure 6 shows the state when cassette loading is completed, with the cassette α installed on the cassette support post (c) on the chassis, and the guard panel (15e) of the cassette 0 opened. In this state, the magnetic tape can be pulled out and stored from the opening.

In addition, during the cassette loading ((Fig. 5)
, near the state of I)), connection lever 0 force and shutter θ4
It no longer makes contact with the cassette holder q, but comes into contact with the case part (not shown) of the cassette holder q, and when the cassette loading movement is completed, the shutter θ becomes the state shown in FIG. At the same time, near the state shown in FIG. 5(C), the cassette holding lever 2 is rotated counterclockwise by the tension spring 2 and comes into contact with the fixing pin 3.

At this time, the cassette Q0 is no longer supported by the outer cassette holding lever, but is supported from below by a cassette guide (not shown) fixed to the chassis θQ. In addition, the drive lever (to) is the cassette holder O.
As already mentioned on both sides of Q, drive gear 0η, plow, drive lever ■, etc. are arranged on the other side of cassette holder 〇ej to transmit the rotation of cassette loading motor 〇ej). It goes without saying that smoother movement can be achieved by driving the OQ.

Effects of the Invention As described above, according to the present invention, a cassette, such as an S-type cassette, which has an opening and a guard panel for the opening and is designed to be inserted mainly from the guard panel side, can be used. When inserting the cassette into the cassette holder, it is inserted slightly diagonally downward with light force, and then the cassette can be placed in a transparent state, making it very easy to see the cassette when it is installed in the specified position, and giving it a classy look. It is an expensive device. Furthermore, even when the cassette holder is protruding toward the front, the shutter prevents the inside from being seen, which is extremely effective in practical use.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a conventional example, FIGS. 2 to 6 show an embodiment of the present invention, and FIG. 2 is an enlarged perspective view seen from the front.
Fig. 8 is a schematic sectional front view showing the internal mechanism, Fig. 4 is a schematic sectional side view showing the internal mechanism, Fig. 5 is a movement locus of the cassette when the cassette is installed, and Fig. 6 is the internal mechanism after the cassette is installed. It is a schematic cross-sectional side view showing. (9)...magnetic tape, 0*...cassette,
osc) (t5a)...opening, (15e)...
・Guard panel, oQ... 1 cassette holder...
Guide base, (29b) (29c)...Guide groove, (1)...Cassette loading motor, cl
l)...drive gear, ni)...drive gear, (c)...
・Cam gear, (to)...Drive lever, 2...Cassette holding lever, (4 gears...Connection lever, (6)・
... Shutter, ■... Drive lever representative Yoshihiro Morimoto Figure 5 # 4 Figure 1

Claims (1)

[Claims] 1. A cassette that stores a magnetic tape inside, has an opening for pulling out the magnetic tape, and a guard panel for shielding this opening, and is made to be inserted into a magnetic recording and reproducing device from the guard panel side. A magnetic recording/reproducing device using a magnetic recording/reproducing device, wherein the cassette is in a first state in which the front side thereof is slightly raised from a horizontal state, and in a second state in which the cassette is opened with a guard panel and the opening is located at the top. a shutter that is configured to shift and record and reproduce signals in the second state, and that prevents the inside of the device from being seen from the outside in the first state, and a guide groove that guides the shutter; A magnetic recording/reproducing device comprising: a connecting lever provided to abut the shutter and open the shutter on the way from a first state to a second state.