JPS58164049A - Cassette containing device - Google Patents

Abstract

PURPOSE:To prevent an accident caused by a dew condensation, by constituting so that a driving motor is not electrified even if a cassette is inserted into a cassette inserting port, in case when the dew condensation is generated on the circumferential face of a guide cylinder of a VTR body. CONSTITUTION:Between the first switch SW1 and a DC power source, a relay switch RL is inserted, this relay switch is normally in a closed state, and operation of said switching circuit is satisfied, but in case when a dew condensation is generated in a VTR body, for instance, on the circumferential face of a guide cylinder, usually a dew condensation sensor 34 provided on the circumferential face of the guide cylinder detects a dew condensation and generates an output, and this detecting output is inputted to a system controlling circuit 35, supplies a cassette installation inhibiting command to said relay switch RL and sets this relay switch to an opened state.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette storage device for a magnetic recording/reproducing device or the like.

In recent cassette-type VTRs, the cassette is inserted into the cassette holder inside the main body through the cassette insertion slot on the front of the VTR body where various operation switches are located, and the cassette is moved together with the cassette holder to the operating position by a motor etc. and set. A so-called front-loading cassette storage device has been proposed in which operations such as recording and playback can be performed from that position.

On the other hand, when dew condensation occurs on the circumferential surface of the guide cylinder, an auto-stop mechanism is usually provided so that the VTR main body enters a stop mode.

Therefore, in the front-loading type cassette storage device described above, even if the cassette is moved to the mounting position when dew condensation occurs, the VTR will not operate.

Therefore, when dew condensation occurs, it is desirable to prevent the front loading motor from being energized even if the cassette is inserted into the insertion slot.

The present invention has been made in view of the above-mentioned points, and provides a cassette storage device that opens the current conduction path of the drive motor when dew condensation occurs.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of the cassette storage device. FIG. 2 is an outer side view of the left side plate, FIG. 6 is an inside view of the left side plate, and FIG. 4 is a side view of the drive mechanism.

(su) are a pair of left and right side plates, f31f4) fil are a top plate, a bottom plate, and a back plate that connect these left and right side plates, and these constitute a frame, and this frame is a VTR.
It is fixed to the main unit's chassis (not shown). A cassette holder (Akatsuki) is movably supported on this frame, and this cassette holder can hold a cassette (not shown) when it is in a position facing an insertion slot formed on an operation panel (not shown). .

Bent pieces (6b) and (6c) rising from both ends of the bottom (6a) are formed on the cassette holder (!) to position the cassette in a predetermined position. ) (6d) has a pair of torsion springs (6
6) A pair of cassette holding levers (6f) (+sf) biased downward by (6θ) are provided to hold the cassette in a predetermined position during movement of the cassette holder (Akatsuki).

('L) is a prevention plate for preventing incorrect or double insertion of the cassette, and is supported rotatably at a predetermined angle by notches (1a) and (2a) provided in the left and right side plates fl)+21. There is. This prevention plate (force) has a tongue piece (7b) which is inclined downward at a predetermined angle with respect to the base part (7a), and the tip part (7C) of this tongue piece is curved upward.
A protruding piece (7CIX7(1)) is provided continuously at the end of a), which engages with the cassette holding lever (6f) (6f) before and after the start of horizontal movement of the cassette holder (see), Keep the base (7a) horizontal.

(, ri is a door that prevents foreign objects from being inserted into the cassette insertion slot, and is rotatably supported on the rotation shaft (8a) between the left and right side panels), and can be opened and closed inward. It is normally biased toward the closed state by a torsion spring (8b).

The opening and closing of this door is controlled by a door opening/closing lever which will be described later.

(11) and (21)) are L-shaped first guide grooves formed on the left and right side plates fl)+21, and first guide grooves formed on the side plates (6'iX+sa) of the cassette holder memory), respectively. guide. -5 (4g) (6g) iEil* L,,.

. 2.125) Memory) is movable in horizontal and vertical directions. Two pairs of guide plates (1c) (1C) and (2c) (2c) are provided on both sides of the horizontal portions of the guide grooves (1b) and (2b) on the inside of the left and right side plates, respectively, and the cassette holder jaws) The second guide roller (1) (
6h). The interval between the guide plates is slightly wider than the width of the first guide groove. (1(lX2+1
) is an elevating guide plate that continuously guides the second guide rollers (6h) (6h) to the guide plate and is movable up and down. Each of these lifting guide plates has a U-shaped guide portion (1θ) (2
θ) is formed. In addition, this elevating guide plate is connected to the slide plate (1g
82g) and are integrated with each other to form a lifting mechanism.

This elevating mechanism is biased upward by coil springs f9)+91, respectively, and is normally operated by the guide portion (1e).
(2s) is the guide plate (1c) (1c) (2c) (2
C), that is, in the raised position.

(10) (Il) is a main gear supported by a first support shaft (1h) (2h) projecting inwardly from the picture side plate +11 [21], respectively, and is driven by a drive mechanism described later. Ru. Near the outer periphery of this main gear, guide pins (10a) (11a) are provided which are loosely fitted into arcuate sixth guide grooves (11) (21) provided on both side plates +11F21, respectively. (1j) (2j) are the second supporting shafts that protrude outward of the both side plates (swords), and are located at different positions from the first supporting shafts (1h) and (2h) that project inward, i.e. , are located below.The second support shafts (1j) and (2j) each have a
The first rotating lever 11202 and the first rotating lever are pivotally supported.

This first rotation lever is connected to the first guide groove (1b) (2b).
) into which the first guide rollers (6g) and (6g) fit loosely, and the guide bins through the sixth guide grooves (11 and 21). (1oa) (11a) is loosely fitted into the abbreviated through hole (1
2b) (12b) is formed, and the main gear (10
) (! can be rotated in conjunction with the rotation of the cassette holder decoy to move the cassette holder hitter. At the mounting position, the cassette holder (supported by a coil spring that acts to force the breath downwards; normally, the first and second rotating levers are held together and integrated as a unit by the urging of this coil spring). It has become.

2) is a drive shaft that communicates between the left and right side plates 1ll (21), and drive gears (1sa) (1sa) are provided at both ends, respectively.
is arranged, and this driving gear is the main gear (
I! to drive. The drive gear (15a) at the right end of the drive shaft
) is further provided with a spring holder at the end thereof, and a torsion spring (17+) is wound around this.

(One barrel is attached to the bracket attached to the right side plate (angle), and this bracket includes a drive motor θ cast, a pulley (21) connected to this drive motor by a belt m, and a pulley (21) mounted on the same axis of this pulley. A worm wheel is attached thereto, and a worm wheel meshing with the worm is attached. 2sa) are provided, and these are normally engaged with the torsion spring (I7), that is, the torsion spring 0η is always on the insertion port side with respect to the cassette holder mouth) and the worm foil. Then, when the worm wheel is stopped, the cassette holder is pressed against the bias of the torsion spring (17).
When pressed in the mounting direction, the first and second lips (16
&) The bond of (25a) is released. Further, (c) is a stopper lever that is rotatably supported on the second support shaft (2j) of the right side plate +21, and the through hole (24a) provided in this stopper lever has the first rotational support shaft (2j). The bent piece (12Q) of the lever is loosely fitted, and a coil spring □□□ is stretched between both levers, so both levers are normally integrated, but the bias of the coil spring against,
It is possible to push both levers apart. and,
A locking piece (24b) is provided at the end of this stopper to engage with the second lip (23a) of the worm wheel to restrict rotation of the first worm wheel. .

The left side plate (first and second switch (SWl) on the sword)
(sw2) is provided to detect insertion, attachment, and ejection of the cassette. The first and second switches are controlled by first and second slide levers supported by support shafts (1k) (11) arranged inside the left side plate (±). The first slide lever □□□ has the support shaft (1k)
Elongated holes (26a) and (26b) into which the switches (11) are loosely fitted are formed so that the switches 9 can be slid only in the horizontal direction, and at the tip there is a suppression piece (26) that presses the first switch (8W1).
c) is provided.

Further, the second slide lever includes the support shaft (11).
An elongated hole (27a) into which the support shaft (1k) is loosely fitted, and a substantially rectangular through hole (27b) into which the support shaft (1k) is loosely fitted are formed. It is rotatable and has the second switch (EIW) at the tip.
2) is provided with a suppressing piece (270) that presses it.

Further, (c) is a coil spring that urges the pivoting end of the second slide lever upward.

The slides of the first and second slide levers are caused by the first and second retaining pins (1ob) (1oe) provided through the main gear (1). □□This is done by engaging the retaining piece (, 26d) and the recess (27d) (27θ) provided on the line.Also, the first and second slides and the support shaft (11) of the idle lever The part that fits loosely is the seat spring e29
Flat washer (4)) (2) l) biased by 1
tlffi) (30), the slide levers are held by the first and second engagement pins (1ob).
) (i oc) is engaged, and even if these engagement bins (1ob) (1oe) are separated,
Its sliding position is maintained.

In addition, (3!) is a door opening/closing lever that opens and closes the door, and is rotatably supported on a support shaft (1 m) of the left side plate (υ). A retaining pin (31&) that engages with the left end (8C) of the door +8+ is arranged, and when it is rotated counterclockwise in FIG. 2, the door jaw opens.

In addition, this lever (3) has a cam portion (3) that can be engaged with a protruding pin (12(1)) provided on the first rotating lever foot.
, 511)) is formed so that, by rotation of the first rotating lever 4, the door (2) is always closed and opened only when the cassette passes under the door (2). Rotate.

Next, regarding the operation of the device of this embodiment, see Fig. 5 (a) to ).
Explain according to the following.

First, the cassette mounting operation will be explained. Figure 5G)
indicates the state before the cassette is inserted, and the door (8) is biased to the closed state, but can be opened by pressure from the outside.

The α fields of the first and second rotating levers are united by the biasing force of the coil spring H, and this state is maintained until the cassette mounting position. The first guide roller (6g) guided by the notch (12a) of the first rotation lever is located at the left end of the first guide groove (1b), and the first guide roller (6g) is located at the left end of the first guide groove (1b).
is in a position that can accept the cassette. At this position of the cassette holder (Dan), the protruding piece (7) of the prevention plate ('L)
d) is engaged with the cassette holding lever (6f), so the angle of inclination is small, and the tongue piece (7b) is located above the cassette insertion path.

In addition, the first and second slide levers @0 are the main gear (10
), the first and second switches (SWl) (SW
2) are each in a closed state.

Next, as shown in Fig. 5←), when the cassette [Co., Ltd.] is inserted through the insertion slot, the door is opened and the sloped part (32a) of the front end of the cassette pushes up the prevention plate (force) to push the cassette holder ( μ) is attached to the specified position.

If you press cassette [Yes] further, the cassette holder (!!
l moves a little to the right. In conjunction with this, the first rotating lever and the main gear (shell) rotate clockwise.The rotation of the main gear causes the first locking pin (10b) to move the second slide lever to the left. Slide to the second slide (
SW2) is opened. At this time, the first slide lever @ is held at the original position by the aforementioned seat spring and flat washer, and the first switch (swi) remains closed.

Here, the first and second switches (SWl) (8W2
) The drive motor is energized by a switch circuit (described later) when one of the two is in the open state, and is de-energized when both are in the same state.

Therefore, as mentioned above, by opening only the second switch (SW2), the drive gear (1Sa) rotates counterclockwise, the main gear begins to rotate clockwise, and the cassette holder is guided by the first rotating lever holder and moves to the right with the cassette placed thereon.

When inserting the aforementioned cassette, the prevention plate +71 is at the tip (7C)
comes into contact with the slope M (sza) of the cassette ■ and the slope part (32a
) slides on top of the cassette and rides on the top surface of the cassette, allowing insertion of the cassette, but if the cassette □□□ is inserted face down or sideways, the side wall of the cassette (32) (Prevention plate (because it comes into contact with the tip (7c) of the sword)
The force cannot be pushed up and insertion is prohibited.

When the cassette holder (2) further moves to the right, the image shown in Fig. 5 (
As shown in 11), the second guide roller (6h) is guided by the guide plate (Ic) (1c) and the lifting guide plate (1d), reaches the end of the guide part (1e), and the first guide roller (6g) reaches the bent portion of the Ml guide groove (1b) and is located within the guide portion (1θ) of the elevation guide plate.

In this state, the door opening/closing lever (machi) is connected to its cam part (31b).
The protruding pin (12d) on the first rotating lever 1 engaged with
) is rotated clockwise due to the rotation of the door).
is kept open.

On the other hand, after the prevention plate (E) is separated from the upper surface of the cassette C112, it stops at a position slightly rotated counterclockwise, and its tip (6C) is located near the approximate center of the cassette insertion path.

Therefore, even if you try to insert another cassette in this state, the tip (70) will not fit into the cassette (cassette) (slanted part (S3) of 831).
Since it does not abut against the front wall (331) but not the front wall (331), insertion is prohibited.

Furthermore, as the main gear rotates from this state,
The first and second guide rollers (6g) (Ah) descend as they ride on the elevating guide plate (1d). Then, as shown in FIG. 5), the cassette holder decoy is guided in the above-described state to the mounting position where the first guide roller (6g) reaches the end of the first guide groove (1b).

During the above-mentioned vertical movement, the protruding pin (
Since 12d) is separated from the cam part (!S1t+) of the door opening/closing lever, the door opening/closing lever rotates counterclockwise to close the door.

On the other hand, when the cassette holder) reaches the mounting position,
The second locking pin (Ioc) of the main gear engages with the engagement piece (26a) of the first slide lever @, slides the lever to the left, and opens the first switch (EIWl). . Therefore, the power supply to the drive motor is renewed and the rotation of the main gear stops.At this time, the second engagement pin (LOC)
is fitted into the recess (27e) of the second slide lever.

In other words, just before the cassette holder (μ) reaches the mounting position, the guide pin (101L) that is engaged with the through hole (121) of the second rotation lever 4 is removed from the side wall of the through hole (12'b). The first guide roller (6g) is engaged with the second rotating lever that is spaced apart and a portion of which is located within the through hole, and the first rotating lever is pulled by the second rotating lever H. is guided to the end of the first guide groove (1b).

Therefore, the first rotating lever (stops at this point,
The second rotating lever H rotates for a short time until the main gear (U!!) stops, and then stops, so the two rotating levers t12) 01, which were previously integrated, are separated a little and are in good condition. Stop at.

Therefore, in the installed state, the second rotating lever is biased toward the second rotating lever side by the coil spring (I41), and the cassette holder is biased downward, so the cassette is urged downward via the cassette holder Leno (-(6f)).

Next, we will discuss cassette discharge salmon production. First, when the eject operation is performed from the state shown in Figure 5), the cassette eject switch (not shown) of the switch circuit (described later) is closed, and the first and second switches (SWl) (EIW2) are both open. Despite this, the drive motor is energized and begins to rotate in the opposite direction from when it was installed. Therefore, main gear 1
10) rotates counterclockwise, and the second retaining pin (1oe)
slides the second slide lever to the right, closing only the second switch (SW2).

It should be noted that the operations of the other mechanisms other than the first and second slide levers during ejection of the cassette are simply the opposite of those during installation, so a description thereof will be omitted.

Then, just before the main gear U rotates and the first retaining pin (10b) reaches the position shown in FIG. The first switch slides the first slide lever 9 to the right.
.

(SWl) is closed and power to the drive motor is cut off.

In this state, the first guide roller (6g) has been guided to the starting end of the first guide groove (1b).
are in different positions. This is because when the cassette is inserted, it is necessary to push the cassette H2 to the position where the drive motor is energized, and in the energized position, the rear end of the cassette has reached the vicinity of the insertion slot, so when the cassette is ejected, the cassette H2 is not energized at this position. This is because if it is cut off, it will be difficult to remove the cassette.

Next, the operation of the stopper lever (c) in this embodiment will be explained with reference to FIG.

The stopper lever □□□ is biased counterclockwise with respect to the second rotating lever by a coil spring □□□, and normally rotates together with the first rotating lever.

When the drive shaft load rotates clockwise to eject the cassette, the locking piece (24
b) engages with spring holder 4, and the stopper lever (
) stops rotating, but the first rotating lever rotates a little further and the first guide roller (6g) moves into the first guide groove (
When reaching the starting end of 1b), the rotation is stopped. In this state, the second rib (2 ribs) of the worm foil (provided on the housing) is stopped at the position where it abuts on the locking piece (2ab).

As mentioned above, during normal operation, even without the use of a stopper lever (land), when the first guide roller (6g) reaches the starting end of the first guide groove (1b), the power to the drive motor is cut off, which poses a particular problem. There isn't. However, if ejection of the cassette is prevented for some reason immediately before ejection of the cassette, for example, the counterclockwise rotation of the second rotation lever stops, and thereby the rotation of the drive shaft also stops.

However, the worm wheel is a torsion spring (+7)
The first rib of the spring holder cape (
16a) and the second rib (2Sa) of the worm wheel sleeve are separated and can rotate, so if there is no stopper lever (2Sa), this worm wheel will rotate beyond the predetermined stopping position, and the torsion The worm wheel [23+' is made to stop at a predetermined position even if the spring (Iη) is deformed due to excessive force and rotates by the ohm wheel □□□.

Next, the switch circuit in the device of this embodiment will be explained with reference to FIG.

First, in the state before the cassette is inserted, the first and second switches (SWl) (SW2) are both closed, as described above.
That is, each movable piece is in a state of being tilted toward the contact point (a). Further, the cassette eject switch (SWS), which is closed in conjunction with the eject operation, is in the open state and is tilted toward the contact point (1). When the cassette is inserted from this state, the second switch (EIW2) is switched to the contact ('b) side. Therefore, a current flows in the forward direction to the drive motor, causing it to rotate in the normal direction.

When the cassette installation is completed, the first switch (Japanese
1) is switched to the contact ('b) side, and the power to the drive motor (1@) is cut off.

Furthermore, when the cassette is ejected, the cassette ejection switch (SWS) is switched to the contact (a) side by ejecting the cassette for a predetermined time, and a current flows in the opposite direction to the drive motor, causing the cassette to be reversed. Immediately after the drive motor (11) starts, the second switch (SW2) switches to the contact (a) side, so the eject operation is then released and the cassette eject switch (SW
Even if the contact point (g) is switched to the contact (b) side, the drive motor blade continues to rotate in the reverse direction.

Then, to complete the cassette ejection, press the first switch (EiW).
j) is switched to the contact (a) side, the power to the drive motor is cut off, and each switch returns to its initial state. Next, the operation of the switch circuit in the device of this embodiment when dew condensation is detected. Explain. A relay switch (EL) is inserted between the first switch (13W1) and the DC power supply, and this relay switch is normally closed and satisfies the operation of the switch circuit described above. , V.T.
If dew condensation occurs in the R body, for example on the guide cylinder surface, the dew condensation sensor (usually installed on the guide cylinder surface)
The device detects dew condensation and outputs an output, and this detection output is input to the system control circuit, which supplies a cassette installation prohibition command to the relay switch (R) to open it. .

Therefore, when dew condensation occurs, the relay switch (RL) is always in an open state, so even if an attempt is made to insert a cassette, the drive motor is not energized.

As described above, according to the present invention, if dew condensation occurs on the guide cylinder surface of the VTR main body, the drive motor is not energized even if the cassette is inserted into the cassette insertion slot, so the cassette loading operation is not performed and dew condensation occurs. This is effective because it can prevent troubles that may occur.

[Brief explanation of the drawing]

The drawings all relate to a cassette storage device according to an embodiment of the present invention, and FIG. 1 is an exploded perspective view of the device of this embodiment, and FIG.
The figure is an outside view of the left side plate, Figure 6 is an inside view of the left side plate, Figure 4 is a side view of the drive mechanism, and Figures 5 (0) (B) (C) and (2) are of the device of this embodiment. FIG. 6 is an explanatory diagram of the stopper lever, and FIG. 7 is a diagram showing an embodiment of the switch circuit. Description of main drawing numbers H... Drive motor, -... Dew condensation sensor, -... System control circuit, (SWI) (lff2).
...First and second switches, (SWS) ...Cassette eject switch, (RL) ...Relay switch procedure amendment (method) Mr. Commissioner of the Japan Patent Office 1, Indication of Case 1982 Patent Application No. 45435 No. 2, Name of the invention: Cassette storage device, Patent applicant Address: 2-18 Hondori, Keihan, Moriguchi City Name (188) Sanyo Electric Co., Ltd. Representative: Kaoru Iue 4, Agent address: Keihan, Moriguchi City 2-18 Hondori Contact information: Telephone (Tokyo) 835-1111 Patent Center Representative Kamata 5 Date of amendment order (shipment date) June 29, 1980 6 Subject to amendment 0 Figure 1 of the drawing , ``Figure 2 j, ``Figure 3'', ``
``Figure 4'', ``Figure 5 P)'', ``Figure 5 (B)'', ``Figure 5
``Figure (C)'', ``Figure 5'', ``Figure 6'', and ``Figure 7''. B. Contents of the amendment O. Engraving of the drawing (no change in content). that's all

Claims (1)

[Claims] fil The cassette holder that holds the cassette inserted from the insertion slot of the main body of the cassette type video recorder towards the back is moved to the installation position when the cassette is installed, and the driving force is applied to the motor to move it to the cassette ejection position when the cassette is ejected. The cassette storage device for obtaining υ is provided with means for detecting dew condensation when it occurs,
A cassette storage device characterized in that energization of the motor is prohibited based on the detection output.