JPH0731396Y2 - Double insertion prevention device for cassettes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a cassette double insertion preventing device which is suitable for application to a cassette mounting device of a cassette type video tape recorder, for example.

[Outline of device]

The present invention relates to a cassette mounting device configured to insert a cassette into the cassette holder from the cassette insertion opening of the front panel and to mount the inserted cassette at the cassette mounting position by the cassette holder. Prevents double insertion of cassette by partially protruding cassette Stopper is configured to be driven by spring and cassette holder, so double insertion of cassette is reliably prevented even though it has a simple structure. In addition, even when the cassette is prevented from being double-inserted, the label of the cassette mounted at the cassette mounting position, the tape usage amount, and the like can be easily visually recognized.

Further, by providing an opening / closing lid having a notch at the cassette insertion port, it is possible to prevent dust from entering the inside of the device through the cassette insertion port, and thus it is possible to protect the inside of the device from dust, which is practical. At the same time, the fact that the cassette is currently mounted is clearly indicated by the presence or absence of the other end of the cassette stopper in the notch, so that the user can easily recognize it at a glance.

[Conventional technology]

The applicant of the present invention has filed a prior application example (actual application Sho) with regard to a device for preventing double insertion of a cassette in a cassette loading device of a front loading system of a cassette type video tape recorder.
61-99981) has already been filed.

In this prior application example, an opening / closing lid that opens and closes the cassette insertion opening, a locking member that locks the opening and closing lid to a closed state, and a cassette holder that is rotationally driven by a motor between the cassette insertion position and the cassette mounting position. And a lock protrusion provided on the drive gear that is reciprocally driven by the drive gear.When the cassette holder is moved forward to the cassette mounting position by the drive gear, the lock protrusion drives the lock member to drive the lock member. The open / close lid is locked by a member so that the lid is closed.

According to this prior application example, a so-called double insertion of a cassette, in which another cassette is mistakenly inserted into the upper part of the cassette holder through the cassette insertion port, even though the cassette is already mounted at the cassette mounting position ( (Erroneous insertion) can be reliably prevented. Therefore, the cassette is double-inserted in the upper part of the cassette holder, and it becomes impossible to return the cassette holder to the cassette insertion position thereafter, or the double-inserted cassette is inserted into the cassette holder and the cassette. As long as you do not disassemble the cassette mounting device, it will be caught between the upper part of the mounting device and the fixed frame.
It is possible to prevent a serious accident, which means that you cannot take it out.

[Problems to be solved by the invention]

However, in this prior application example, since the opening / closing lid that opens and closes the cassette insertion opening is locked in the closed state, the cassette is attached to the cassette attachment position, and the double insertion of the cassette is prevented. You cannot open the open / close lid by hand and look inside the front panel from the cassette insertion slot. Therefore, in the state where the double insertion of the cassette is prevented, there is an inconvenience that the label or tape usage amount of the cassette mounted at the cassette mounting position cannot be visually recognized.

Further, in this prior application example, the structure of the mechanism for locking and unlocking the locking member is complicated, and a large number of parts and assembling steps are required.

The present invention has been made to solve the above problems, and it is possible to reliably prevent double insertion of the cassette regardless of the opening / closing lid that opens and closes the cassette insertion port, and has a simple structure. The present invention provides a double insertion preventing device for a cassette.

[Means for solving problems]

In order to solve the above problems, the present invention provides a front panel having a cassette insertion opening, a cassette insertion position facing the cassette insertion opening inside the front panel, and a cassette mounting position for mounting the cassette. A cassette holder configured to be reciprocally movable between the cassette holder and an opening / closing lid that has one end pivotally supported by the front panel and that rotates between an open lid position and a closed lid position of the cassette insertion opening. In the cassette mounting device configured to insert the cassette into the cassette holder from the cassette insertion port while opening the opening / closing lid and mount the inserted cassette to the cassette mounting position by the cassette holder, A cassette stopper arranged inside the panel, a pivot shaft pivotally supporting one end of the cassette stopper, and the cassette stopper. And a spring for biasing the cassette stopper so as to rotate the other end of the cassette stopper from the non-operating position retracted to the outside of the cassette insertion port to the operating position protruding to a part of the cassette insertion port, and the rotation by the spring. Provided on the opening / closing lid for receiving the stopper for stopping the cassette stopper in the operating position and the other end of the cassette stopper in the operating position and exposing the other end to the outside of the cassette mounting device. With notches,
A pressing portion of the cassette stopper provided on the cassette holder, and when the cassette holder is returned to the cassette insertion position, the pressing portion presses the cassette stopper, and the cassette stopper is When the cassette holder is moved back to the cassette mounting position against the spring, the pressing portion is separated from the cassette stopper, and the cassette stopper is moved by the spring. It is configured to rotate to the operating position.

[Action]

According to the device for preventing double insertion of the cassette in this invention, the cassette stopper which is not related to the opening / closing lid for opening and closing the cassette insertion port is used, and the cassette stopper is projected in a part of the cassette insertion port. This is to prevent double insertion of the cassette. Therefore, even if the cassette stop stopper is provided with a notch for escaping the cassette stopper, even if the cassette stopper prevents double insertion of the cassette, the cassette stopper will not interfere with it. , The open / close lid can be freely opened by hand. Moreover, the structure for driving the cassette stopper by the spring and the cassette holder is extremely simple.

Further, since the notch can receive the other end of the cassette stopper and expose the other end to the outside of the cassette mounting device, it can be clearly indicated that the cassette is being mounted.

〔Example〕

An embodiment in which the present invention is applied to a cassette loading device of a front loading type of a cassette type video tape recorder will be described below with reference to the drawings.

First, as shown in FIGS. 1A and 1B, a cassette insertion opening 2 is provided in the front panel 1, and a cassette holder 3 is arranged inside the front panel 1. The cassette holder 3 is supported by a pair of left and right holder support plates 5 mounted vertically on the chassis 4. That is,
A plurality of guide grooves 6 provided in both holder support plates 5 and having a substantially inverted L shape are engaged with a plurality of guide rollers 7 mounted on both left and right side surfaces of the cassette holder 3. The cassette holder 3 is configured to be driven by a cassette holder drive mechanism (not shown), and the cassette holder 3 has a cassette insertion position facing the cassette insertion opening 2 shown in FIG. 1B. , Between the cassette insertion position shown in FIG. 1B and the cassette mounting position rearward and downward of the cassette insertion position, an arrow a is formed along a substantially reverse L-shaped movement path guided by the plurality of guide grooves 6 and the guide rollers 7. And b are reciprocally movable.

Next, as shown in FIGS. 1A, 1B and 3, an opening / closing lid 10 for opening and closing the cassette insertion opening 2 is provided inside the front panel 1. This opening / closing lid 10 is centered on a horizontal pivot 11 erected between both holder support plates 5, and is indicated by an arrow c between a closed position shown by a chain line in FIG. 1A and an open position shown by a solid line. The lid is configured to be openable and closable in the d direction and is biased by the lid closing spring of the opening / closing drive mechanism (neither is shown).

By the way, in this cassette mounting device, as shown in FIG. 2 by a one-dot chain line and a two-dot chain line, a large cassette 12 and a small cassette are provided.
13 and 13 are selectively inserted into the cassette holder 3 so that the large and small cassettes 12 and 13 can be selectively mounted at the cassette mounting positions. That is, as shown in FIG. 1B, by opening and closing the opening / closing lid 10 in the direction of arrow c, the large and small cassettes 12 and 13 are inserted from the cassette insertion opening 2 into the cassette holder 3 which is returned to the cassette insertion position by the arrow e. Insert from the direction. At this time, the small cassette 13 is inserted and positioned between the pair of left and right cassette insertion guides 14 provided on the bottom plate 3a of the cassette holder 3, as shown by the chain double-dashed line in FIG. And after this, the cassette holder 3
Is moved from the cassette insertion position to the cassette mounting position in the direction of arrow a as shown in FIG. 1A, and the large and small cassettes 12, 13 are
Is selectively mounted to the cassette mounting position, and these large and small cassettes 12 and 13 are mounted to the pair of left and right reel stands 15 and the like. The pair of left and right reel bases 15 and the pair of left and right reel motors 16 that drive them are automatically adjusted in spacing according to the large and small cassettes 12 and 13. The opening / closing lid 10 driven by the opening / closing drive mechanism is closed in the direction of the arrow d as shown by the chain line in FIG. 1A when the cassette holder 3 is moved to the cassette mounting position. While being moved back to the cassette insertion position, the lid is opened in the direction of arrow c as shown by the solid line in FIG. 1A. Then, from the inside of the cassette holder 3 which has been moved back, the large and small cassettes 12, 13 are indicated by the arrow f in FIG. 1B.
When it is pulled out in the direction, the opening / closing lid 10 is attached by a spring to the arrow d.
It is closed in the direction.

Next, a double insertion preventing device for a cassette will be described with reference to FIGS. 1A to 5.

First, a cassette stopper 20 made of synthetic resin is arranged inside the front panel 1. The cassette stopper 20 has a predetermined length 1 in the left-right direction (see FIGS. 2 and 3), and is disposed below the cassette insertion port 2 at a substantially central position in the left-right direction. One end 20a, which is the rear end of the cassette stopper 20, is rotatably supported by a stopper supporting member 21 mounted on the chassis 4 via a horizontal pivot shaft 22. A non-operating position in which the other end 20b, which is the front end of 20, is retracted below the cassette insertion opening 2 as shown in FIG. 4A,
As shown in FIG. 4C, the other end 20b is rotated in the directions of arrows g and h between the lower end of the cassette insertion opening 2 and the operating position in which the small height H _{1 is} projected from below. Is configured. Both ends 23a, 23b of the pair of left and right torsion coil springs 23 inserted in the outer periphery of the pivot shaft 22 are connected to the pair of spring locking portions 24, 25 provided in the cassette stopper 23 and the stopper supporting member 21. The cassette stop 20 is locked, and the cassette stop 20 is moved to the operating position by the arrow h.
Is biased to rotate in the direction. As shown in FIGS. 2 and 5, the cassette stopper 20 rotated by the torsion coil spring 23 has a pair of left and right stoppers 26 integrally provided on the cassette stopper member 21 integrated with the stopper support member 21. By contacting the pair of left and right stoppers 27 provided at the bottom from below, the stoppers are stopped at the operating position.

On the other hand, a pressing portion 28 for pressing the cassette stopper 20 from above is integrally provided at substantially the center of the front end edge of the bottom plate 3a of the cassette holder 3 in the left-right direction. A pressing guide surface 29 of the pressing portion 28 is provided at a substantially central portion in the direction. The other end 20b of the cassette stopper 20 has a cassette receiving surface 3
0 and the cassette receiving surface 30 has a fluorescent sheet 3
1st grade is glued. Further, a shallow notch 32 is provided at the lower end of the opening / closing lid 10 at approximately the center in the left-right direction so that the other end 20b of the cassette stopper 20 can be inserted from below.

Next, the operation of preventing the double insertion of the cassette will be described.

First, when the cassette holder 3 is moved back to the cassette insertion position shown in FIG. 1B, the pressing portion 28 of the cassette holder 3 causes the pressing guide surface of the cassette stopper 20 to move as shown in FIG. 4A.
Pressed by 29, the cassette stopper 20 is rotated in the direction of arrow g to the non-operating position against the torsion coil spring 23.

Therefore, as shown by the alternate long and short dash line in FIG. 4A, the opening / closing lid 10 is pushed open in the direction of arrow c to selectively insert the large and small cassettes 12 and 13 into the cassette holder 3 from the cassette insertion opening 2 in the direction of arrow e. Can be inserted into.

Next, after selectively inserting the large and small cassettes 12 and 13 into the cassette holder 3, when the cassette holder 3 starts to move from the cassette insertion position to the cassette mounting position in the direction of arrow a in FIG. 4B, the cassette holder 3 The pressing portion 28 separates from the pressing guide surface 29 of the cassette stopper 20 in the direction of arrow a. At this time, the cassette stopper 20 rotates in the direction of the arrow h by the torsion coil spring 23, but the other end 20b of the cassette stopper 20 passes through the large and small cassettes 12, 13 until the large and small cassettes 12, 13 pass. It is in contact with the lower surface, and large and small cassettes 12, 13
After passing through the cassette stopper 20
Thus, the other end 20b of the cassette stopper 20 is pivotally moved to the operating position as shown in FIG. 4C. At this time, as shown in FIG.
26 contacts the lower surface of the stopper 27 from below and prevents further rotation of the cassette stopper 20 in the direction of arrow h.

Therefore, when the cassette holder 3 is moved to the cassette mounting position shown in FIG. 1A, the cassette stopper 20 has already been rotated in the direction of arrow h to the operating position as shown in FIG. 4C. At this time, the other end 20b of the cassette stopper 20 is cut into the notch 32 of the opening / closing lid 10 which is rotated in the direction of arrow d to the closed position.
The fluorescent sheet 31 is inserted from the lower inside to be exposed at the lower position of the cassette insertion port 2 so that the user can recognize that the cassette is already attached.

On the other hand, as shown in FIG. 4C, the other end 20b of the cassette stopper 20 rotated to the operating position is protruded from a lower part of the cassette insertion opening 2 by a small height H ₁ . Then, the gap H ₂ between the other end 20b and the upper end of the cassette insertion port 2 becomes smaller than the height H ₃ of the large and small cassettes 12 and 13.
(H ₂ <H ₃ ) Therefore, even if an attempt is made to double-insert (erroneously insert) the large and small cassettes 12 and 13 from the cassette insertion opening 2 into the front panel 1 in the direction of arrow e in this state, the large and small cassettes 12 and 13 , 13 are brought into contact with the cassette receiving surface 30 of the cassette stopper 20,
The double insertion cannot be done.

However, at this time, as shown in FIG. 4C, the other end 20b of the cassette stopper 20 rotated to the operating position is made higher than the pivot shaft 22 by a height H ₄ , and further, it is rotated to the operating position. The other end 20b of the moved cassette stopper 20 is a cassette receiving surface 30.
Is tilted backward by a predetermined angle .theta. In the direction of the arrow e which is the cassette insertion direction with respect to the vertical plane.

Therefore, when the cassette receiving surface 30 of the cassette stopper 20 is pushed in the direction of arrow e by the large and small cassettes 12 and 13, a rotational moment in the direction of arrow h acts on the cassette stopper 20. As a result, no locking mechanism for locking the cassette stopper 20 in the operating position is required, and the cassette stopper 20 can strongly prevent double insertion of the cassette.

On the other hand, as described above, even when the cassette stopper 20 prevents double insertion of the cassette, the opening / closing lid 10 is moved in the direction of arrow c in FIG. 4C without being disturbed by the cassette stopper 20. You can open it by hand.

Therefore, as shown in FIG. 1A, the opening / closing lid 10 is opened by hand in the direction of arrow c, and the inside of the front panel 1 is easily seen through the cassette insertion opening 2 to be selectively attached to the cassette attachment position. The labels and tape usage of large and small cassettes 12 and 13 can be easily viewed.

When the cassette holder 3 is moved back from the cassette mounting position to the cassette insertion position, the large and small cassettes 12 and 13 come into contact with the upper surface 20c of the cassette stopper 20 from the direction of the arrow b first as shown in FIG. 4D. After the cassette stopper 20 is slightly rotated in the direction of arrow g against the torsion coil spring 23, the pressing portion 28 of the cassette holder 3 is brought into contact with the pressing guide surface 29 of the cassette stopper 20 as shown in FIG. 4A. When pressed, the cassette holder 3 is completely rotated in the direction of arrow g against the torsion coil spring 23 to the non-operating position.

Therefore, even if the large and small cassettes 12 and 13 are subsequently withdrawn from the cassette holder 3 in the direction of arrow f in FIG. 1B, the cassette stopper 20 does not jump out to the operating position.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments and various effective modifications can be made based on the technical idea of the present invention.

Further, the present invention can be applied to a mounting device for various cassettes (or cartridges) that accommodate various recording media such as recording and reproducing tapes and disks.

[Effect of device]

As described above, according to the cassette double insertion preventing device of the present invention, even if the cassette stopper prevents the cassette double insertion, the cassette stopper can be opened and closed without being disturbed by the cassette stopper. Open the lid freely by hand,
Since the inside of the front panel can be easily seen through the cassette insertion opening, even if the cassette is prevented from being double-inserted, the label and tape usage of the cassette installed in the cassette installation position can be easily viewed. can do.
Moreover, the mechanism for driving the cassette stopper is very simple, and the number of parts and the number of assembling steps are small.

Further, since the opening / closing lid is provided, it is possible to prevent dust from entering the inside of the apparatus through the cassette insertion port, and thus it is possible to protect the inside of the apparatus from dust, which is practical.

Further, by providing the notch on the opening / closing lid, it is apparent from the appearance that the cassette is currently mounted, so that the user can easily recognize that at a glance. Therefore, the cassette currently mounted can be immediately ejected and a new cassette can be inserted. Conventionally, in terms of appearance,
It was difficult or impossible to recognize that there was a cassette being installed, so I could look into the narrow insertion slot,
It was possible to recognize that there was a cassette being mounted for the first time after trying the double insertion of the cassette and finding that it could not be inserted, but since the present invention does not need to perform such a wasteful operation, Operability is higher than the device.

[Brief description of drawings]

The drawing shows an embodiment of the present invention, which is
Fig. 1 and Fig. 1B are sectional side views showing the entire cassette mounting device, and Fig. 2 shows the entire cassette double insertion preventing device.
1B is a plan view taken along the line II-II in FIG. 1B, and FIG. 3 is a line III-III in FIG.
The front view in the direction of the arrow, FIGS. 4A to 4D are cross-sectional side views in the direction of arrows IV-IV in FIG. 2 for explaining the double insertion preventing device of the cassette, and FIG. FIG. In the reference numerals used in the drawings, 1 ... Front panel 2 ... Cassette insertion port 3 ... Cassette holder 10 ... Opening / closing lid 20 ... Cassette stopper 20a ... One end 20b ... Other end 22. Spindle 23 …… Torsion coil spring 26,27 …… Stopper 28 …… Pressing part 32 …… Notches.

Claims (1)

[Scope of utility model registration request] 1. A front panel provided with a cassette insertion port, and reciprocating between a cassette insertion position inside the front panel facing the cassette insertion port and a cassette mounting position for mounting a cassette. The cassette holder has a structure and an opening / closing lid that is pivotally supported at one end on the front panel and that rotates between the opening position and the closing position of the cassette insertion opening. However, in the cassette mounting device configured to insert the cassette into the cassette holder from the cassette insertion opening and mount the inserted cassette to the cassette mounting position by the cassette holder, the cassette disposed inside the front panel. A stopper, a pivot shaft pivotably supporting one end of the cassette stopper, and the other end of the cassette stopper to the cassette. A spring for urging the cassette stopper to rotate so as to rotate from the non-operating position retracted outside the inlet to the operating position protruding to a part of the cassette insertion port, and the cassette stopper rotated by the spring. A stopper for stopping at the operating position, a notch provided in the opening / closing lid for receiving the other end of the cassette stopper in the operating position and exposing the other end to the outside of the cassette mounting device, A pressing portion of the cassette stopper provided on the cassette holder, and when the cassette holder is returned to the cassette insertion position, the pressing portion presses the cassette stopper, and the cassette stopper is pressed against the spring. The cassette holder to the non-operating position, and the cassette holder is moved to the cassette mounting position. Was the time, the pressing part is separated from the cassette stopper, double insertion prevention device of the cassette, characterized in that the cassette stoppers were configured to pivot to the operative position by the spring.