JPH057781B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a cassette-type recording/reproducing device such as a VTR, in which a cassette (for example, a cassette containing a magnetic tape, a magnetic disk, or an optical disk) is inserted. This relates to improvements in the detection mechanism.

[Prior art] This type of conventional cassette-type recording/reproducing device is
FIG. 10 will be explained from FIG. Figure 8 is a front view when the cassette is inserted, Figure 9 is a side view of Figure 8,
FIG. 10 is a side view when the cassette is installed. In the figure, 1 is a cassette, 2 is a cassette holder that stores and holds the cassette 1, 3 is a guide pin fixed to the cassette holder 2, and 4 is a base having L-shaped holes 4a on both sides for guiding the guide pin 3. 5 is a support shaft fixed to the base plate 4; 6 is an arm that engages with the guide pin 3 and rotates around the support shaft 5; 7 is a gear that rotates around the support shaft 5; 8 is a gear 7; 9 is a synchronization shaft that rotates together with the drive gear 8 and is supported by the base plate 4; 10 is a stopper pin fixed on the arm 6; 11 is a gear 7;
A pin is fixed on the top, 12 is a spring hung between the stopper 10 and the pin 11, and 13 is an arm 6.
A start switch that is switched by the rotation of 1
Reference numeral 4 denotes a mounting switch which is switched by contacting the cassette 1 at the cassette mounting position.

Next, the operation will be explained. Figures 8 and 9
As shown in the figure, cassette 1 is placed in cassette holder 2.
When the cassette 1 is pushed manually in the direction of arrow A with the device fully inserted, the cassette holder 2 also moves in the direction of arrow A, and the arm 6 that is linked to this moves in the direction of arrow B while stretching the spring 12. Rotate to. At this time, the start switch 13 comes into contact with the arm 6 and is switched. When this switching of the start switch 13 is detected, the drive gear 8 is driven in the direction of arrow C by another drive source, so the gear 7 that meshes with it rotates, and the pin 1
0, the arm 6 is rotated in the direction of arrow B. The cassette holder 2 is driven by the arm 6 to move in the direction of arrow D along the L-shaped hole 4a, and the cassette 1 is set at the cassette mounting position as shown in FIG. At this time, the mounting switch 14 comes into contact with the cassette 1 and is switched. In this way, by switching the mounting switch 14,
Assuming that the cassette 1 has been correctly set, the next operation (for example, tape drawing operation) is started.

Even after a certain period of time has passed, the installation switch 1
4 is not switched, the drive gear 8 is driven in the opposite direction to return the cassette 1 to the cassette insertion position shown in FIGS. 8 and 9.

[Problems to be Solved by the Invention] In the conventional cassette type recording and reproducing apparatus as described above, when the cassette 1 is pushed in and the cassette holder 2 is moved to a predetermined position, the arm 6 that interlocks with the cassette holder 2 starts the operation. Since the switch 13 is switched and the cassette holder 2 is driven, even if the cassette 1 gets caught in the cassette holder 2 for some reason and is not completely inserted into the correct position. When the cassette holder 2 is moved to a predetermined position, the start switch 13 is switched and the cassette holder 2 is driven, so the cassette 1 may interfere with other parts of the device during the movement, preventing smooth operation. However, there was a problem in that the cassette 1 and the device were damaged.

This invention was made to solve this problem, and by detecting the position of the cassette in the cassette holder, if the cassette is not completely inserted into the cassette holder, the drive by the drive source is stopped. Furthermore, by reversing the drive and moving the cassette that has not been completely inserted into the cassette holder and the cassette holder to the original cassette insertion position, it is possible to eliminate cassettes that occur when the cassette is not installed in the correct loading position. To provide a cassette type recording/reproducing device which can prevent the device from being damaged or damaged, and which does not prevent opening of the front cover of the cassette by locking this lever at the cassette mounting position and allows the basic operation of the entire device to be carried out smoothly. The purpose is to

[Means for Solving the Problems] The cassette type recording and reproducing apparatus according to the present invention includes a cassette holder 2 that stores a cassette and moves between a cassette insertion position and a cassette mounting position, and a cassette holder 2 that is interlocked with the cassette holder 2. a lever 15 which is biased to an initial position and is driven by the engagement portion 20 contacting the cassette in the cassette holder 2 to rotate from the initial position against the biasing force; A switch 19 is switched by the rotation of this lever 15 to detect the presence of a cassette in the cassette holder 2, and is linked to the lever 15 and engaged with the interlocking member 3 from the cassette insertion position to the initial loading position. By not doing so, the biasing force of the lever 15 is not limited at the position between these positions, and by engaging with the movement member 3 and limiting the biasing force of the lever 15 at the cassette mounting position,
A locking member 23 is provided for locking the engaging portion 20 of the lever 15 in a position where it does not engage with the front surface of the cassette.

[Function] In this invention, if the cassette is not completely inserted into the cassette holder from the cassette insertion position to the initial loading position, the switch will not switch due to the urging force that tends to return the lever to the initial position. Even after switching, the drive by the drive source will switch back to the direction in which it will not start, preventing damage to the cassette or the device.In addition, by locking this lever in the cassette installation position, it will prevent the front cover of the cassette from opening. First, the basic operations of the entire device can be performed smoothly.

[Embodiment of the Invention] An embodiment of the invention shown in FIGS. 1 to 7 will be described below. Figure 1 is a plan view of the main part before the cassette is inserted, Figure 2 is a plan view of the main part when the cassette is inserted, Figure 3 is a side view of Figure 2, and Figure 4 is the main part when the cassette is pushed further after insertion. Fig. 5 is a side view of the main part when horizontal movement of the cassette is completed;
FIG. 6 is a plan view of the main parts when the cassette is installed, and FIG. 7 is a side view of FIG. 6. In the figures, the same or corresponding parts as those of the conventional device described above are denoted by the same reference numerals, and the explanation thereof will be omitted.

In the figure, 15 indicates two arcuate parts 15A, 15
A lever 16 having B is a shaft around which the lever 15 rotates, and is provided on the lower side of the upper surface of the base plate 4. 17 is a return spring that urges the lever 15 to the initial position shown in FIG.
It is hung between. Reference numeral 18 denotes an insertion determination switch disposed near the corner 15a of the arcuate portion 5A of the lever 15, which determines whether the cassette 1 is completely inserted into the cassette holder 2. 19 is a corner 15b of the arc portion 15B of the lever 15
This is a start determination switch located a little apart from the cassette holder 2, which determines whether the cassette 1 is fully inserted into the cassette holder 2 and is further pushed in. 20 is lever 1
It is an engaging part provided at the tip of 5 and is shortened in the vertical direction. Reference numeral 21 indicates a locking pin 22 fixed to the middle part of the lever 15. A locking pin 22 is fixed to the lower side of the upper surface of the base plate 4. Reference numeral 23 indicates a pin rotatably connected to the lever 15 through an elongated hole 23a that fits into the locking pin 21. 22
This locking member is slidably attached to the base plate 4 through a long hole 23b that is fitted into the locking member, and has a locking piece 23A that engages with the guide pin 3 of the cassette holder 2 at the cassette mounting position.

Next, the operation will be explained. When the cassette 1 is inserted into the cassette holder 2 in the direction of arrow E in FIG. The cassette is then rotated slightly in the direction of arrow F and inserted into the cassette insertion position shown in FIGS. 2 and 3. At this time, the lever 15 switches the insertion determination switch 18 as shown in FIG. 2, so that it is detected that the cassette 1 has been completely inserted into the cassette holder 2. Then, when the cassette 1 is pushed in by hand in the direction of arrow E with a stronger force than when inserted in the cassette insertion state of FIGS. 2 and 3, the cassette 1 further rotates the lever 15 in the direction of arrow F. , the start determination switch 19 is switched as shown in FIG. When this switching is detected, another drive source starts driving, the arm 6 rotates in the direction of arrow B, and the cassette holder 2 moves along the L-shaped hole 4a. In the state shown in FIG. 4, the lock member 23 is pulled by the rotation of the lever 15 and moves in the same direction as the cassette holder 2, but moves separately from the cassette holder 2. In other words, since the engaging portion 20 of the lever pushed by the cassette holder is located farther from the shaft 16, which is the center of rotation, than the locking pin 21, the movement of the locking member 23 is smaller than the movement of the cassette holder 2. becomes.

During this time, if cassette 1 is not in the proper position in cassette holder 2 or if cassette 1 is removed, switch 18 or 19 is pressed to return lever 15 to its initial position.
is switched again and the drive source stops driving.

After the guide pin 3 abuts and engages the lock piece 23a of the lock member 23 during the movement of the cassette holder 2, the lock piece 23a is pushed by the guide pin 3, and the lock member 23 is moved within the range of the elongated hole 23b. and reaches the horizontal movement completion position as shown in FIG. During this time, the locking member 23 is directly attached to the guide pin 3.
As a result, the movement of the lever 15 is greater than the movement of the locking member 23. Therefore, when the horizontal movement is completed, the lever 15 is at a position a little distance from the cassette 1, as shown in FIG. Locked. This is front cover 1 of cassette 1
This is to prevent the lever from interfering with opening a.

During this period, the movement of the lever 15 is limited by the engagement position between the lock piece and the guide pin, and the lever 15 cannot return to its initial position.

When the cassette holder 2 is moved to the cassette mounting position shown in FIGS. 6 and 7, its front cover 1a is
is opened, and finally the cassette is set at the cassette loading position with the front lid 1a open as shown in FIGS. 6 and 7.

When the cassette holder 2 returns, the return spring 1
Due to the urging force of 7, the lock member 23 and the guide pin 3 return together with the lever 15, and return to the cassette insertion position shown in FIGS. 2 and 3 together with the cassette holder 2 driven by the drive source. and,
When the cassette 1 is pulled out from the cassette holder 2, it is returned to the initial position shown in FIG. 1 by the biasing force of the return spring 17.

In the above embodiment, even if the cassette 1 is further pushed in with the insertion determination switch 18 not being switched, the lever 5 will not rotate to a predetermined position and the start determination switch 19 will not be switched, so the drive source will not be driven. Furthermore, even if a performance start button (not shown) provided on the guide pin is pressed, the drive source will not be driven unless the insertion determination switch 18 has been switched. That is, unless the cassette 1 is completely inserted into the cassette holder 2, the cassette holder 2 will not move.

Further, although the above embodiment shows the case where two switches are provided, for example, a final check switch for detecting the position of the cassette at the cassette loading position may be added as a third switch.
For example, it may be a single start switch.

[Effects of the Invention] As explained above, in the case where the cassette is not completely inserted into the cassette holder from the cassette insertion position to the initial loading position, the lever is biased to return to the initial position. Even if the switch does not switch or is switched, the drive by the drive source is switched again in the direction in which it does not start, thereby preventing damage to the cassette or the device. Further, in the cassette mounting position, by locking this lever, the opening of the front cover of the cassette is not hindered, and the basic operations of the entire apparatus can be carried out smoothly.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, and Fig. 2 is a plan view of the main part before inserting the cassette, Fig. 3 is a side view of Fig. 2, and Fig. 4 is a plan view of the main part before inserting the cassette.
The figure is a plan view of the main part when the cassette is pushed further after insertion, Fig. 5 is a side view of the main part when the cassette has completed horizontal movement, and Fig. 6 is a plan view of the main part when the cassette is installed.
7 is a side view of FIG. 6, FIG. 8 is a front view of the conventional device when the cassette is inserted, FIG. 9 is a side view of FIG. 8, and FIG. 10 is a side view of the cassette when it is installed. In the figure, 1 is a cassette, 2 is a cassette holder, 3 is a guide pin, 4 is a base plate, 15 is a lever, 17 is a return spring, 18 is an insertion determination switch, 19 is a start determination switch, and 23 is a locking member. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. A cassette holder 2 that stores a cassette and moves between a cassette insertion position and a cassette mounting position, an interlocking member 3 that moves in conjunction with the cassette holder 2, a cassette holder 3 that is biased to an initial position, and A lever 15 rotates from the initial position against the urging force when the cassette in the cassette holder 2 comes into contact with the engaging portion 20, and is switched by the rotation of the lever 15 to move the cassette into the cassette holder 2. A switch 19 for detecting the presence of a cassette is connected to the lever 15, and does not engage the interlocking member 3 from the cassette insertion position to the initial loading position, thereby preventing the lever 15 from being attached at a position between these positions. By engaging with the interlocking member 3 and limiting the biasing force of the lever 15 in the cassette mounting position without limiting the force, the engaging portion 20 of the lever 15 does not engage with the front surface of the cassette. A cassette type recording/reproducing device characterized by comprising a locking member 23 for locking in position. 2 There are two switches, one of which is an insertion determination switch that determines whether the cassette is fully inserted into the cassette holder, and the other is a switch that determines whether the cassette is fully inserted into the cassette holder and is further pushed in. Claim 1 is a start determination switch that determines whether or not
The cassette type recording and reproducing device described in Section 1. 3. The cassette type recording and reproducing apparatus according to claim 1, wherein the cassette holder is fitted and supported by a guide pin into an L-shaped hole in the base plate, and a locking member is brought into abutting engagement with the guide pin. .