JPH0450671B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cassette attaching/detaching device installed in a magnetic recording/reproducing device such as a video tape recorder.

[Conventional technology]

A conventional cassette attachment/detachment device of this type will be explained with reference to FIGS. 2 to 7. Figure 2 is a schematic perspective view;
Figure 3 is a side view of Figure 2, Figure 4 is a schematic perspective view of the main parts in Figure 2, Figure 5 is a side view of Figure 4, Figure 6 is a partial rear view of Figure 5, and Figure 7 is a side view of Figure 2. This figure shows the operation and is the same side view as FIG. 5. In the figure, 1
2 is a deck base, and 2 is a frame fixed to the deck base 1, which is composed of a top plate 2a and side plates 2b and 2c. Reference numerals 3 and 4 denote guide grooves provided on the side plate 2b of the frame 2, and although not shown, the same guide grooves are symmetrically provided on the side plate 2c as well. Reference numeral 5 denotes a cassette, and 6 an inner case movably supported within the frame 2, which is formed into a box shape with side plates 6a, 6b, a bottom plate 6c, and a reinforcing plate 6d so as to accommodate the cassette 5. Pins 7a and 8a are implanted in the side plate 6a of the inner case 6, and are fitted into the guide grooves 3 and 4, respectively. Pins 7b and 8b are implanted in the side plate 6b of the inner case 6, and are fitted into guide grooves (not shown), respectively. 9a and 9b are the top plate 2 of the frame 2
10a and 10b are through holes provided in the bottom plate 6c of the inner case 6; 11 is an L-shaped arm whose intermediate portion is rotatably supported by a pin 12 on the side plate 6a of the inner case 6; The bent portion 11a projects into the inner case 6 from the through hole 10a and engages with the cassette 5, while the claw portion 11b at the other end engages with the lock hole 9a. 13 is a spring that urges the arm 11 to a position where the claw portion 11b engages with the lock hole 9a;
Reference numeral 4 denotes an L-shaped arm whose intermediate portion is rotatably supported by a pin 15 on the side plate 6b of the inner case 6, and a bent portion 14a at one end projects into the inner case 6 through the through hole 10b and engages with the cassette 5. The claw portion 14b at the other end is a spring that biases the claw portion 14b to a position where it engages with the lock hole 9b.

Next, the operation will be explained. 2 to 6 show a state in which the inner case 6 is at the cassette 5 take-out position and the cassette 5 is not stored. In this state, the bent portions 11a, 14a of each arm 11, 14 are pressed against the cassette insertion side in each through hole 10a, 10b by each spring 13, 16, and each claw portion 11b, 14b is pressed against each lock. Since it engages with the holes 9a and 9b, horizontal movement of the inner cover 6 becomes impossible (hereinafter, this state will be referred to as a locked state). Then, the cassette 5 is inserted in the direction of the arrow, and the cassette 5 is in the stored state shown in FIG. In this state, the lower end of the cassette 5 is connected to the bent portion 11a of each arm 11, 14,
14a is pushed against each spring 13, 16 and moved to the opposite side of each through hole 10a, 10b, so each arm 11, 14 rotates and each claw part 11b, 14b
are removed from each lock hole 9a, 9b, and the inner cover 6 can be moved horizontally (hereinafter, this state will be referred to as unlocking).

Furthermore, if the cassette 5 is not fully accommodated in the inner case 6, the rotational positions of the arms 11 and 14 will not reach the state shown in FIG. Each claw part 11
The amount of space between each of the claws 11b, 14b and the top plate 2a and each of the claws 11b, 14b are adjusted such that the claws 11b, 14b engage with the respective lock holes 9a, 9b and are in a locked state.
The shape etc. are set.

[Problem that the invention seeks to solve]

In the conventional cassette attachment/detachment device of the magnetic recording/reproducing apparatus as described above, the arms 11 and 14 are separately attached to the side plates 6a and 6b of the inner cover 6, so that the arms 11 and 14 are attached to the inner cover 6 as shown in FIG. Insert the cassette 5 diagonally to the leading side (arrow section) of the cassette 5.
When pressed, the right side of the inner case 6 is unlocked, but the left side remains locked due to insufficient rotation of the arm 14, and when the cassette 5 is pressed further, the lock is released as shown in Fig. 9. The right side of the inner cover 6 begins to move horizontally, but the left side remains stationary, so the inner cover 6 receives the force pushing the cassette 5 in a twisted state. At this time, if the rigidity of the inner hood 6 is insufficient, there is a risk that the pins 7a, 7b, 8a, 8b may fall off from the respective guide grooves 3, 4 of the side plates 2b, 2c of the frame 2. In addition, the operating feel when inserting the cassette 5 at an angle is favorable because the inner cover 6 on the side where the cassette 5 precedes also leads the cassette 5 as seen from the cassette insertion slot and becomes in a locked state. It's not a thing.

This invention was made to solve this problem, and has a simple configuration in which the cassette detection arm and the lock arm provided on both the left and right sides are linked alternately on the left and right sides by two connecting shafts, and the cassette can be stored. To provide a cassette attachment/detachment device for a magnetic recording/reproducing device capable of stably inserting a cassette with a good operational feeling without twisting the inner cover or locking the cassette in an oblique state.

[Means for solving problems]

The cassette attachment/detachment device for a magnetic recording/reproducing apparatus according to the present invention includes an inner case which is movably supported by a frame and which stores a cassette inserted through a cassette insertion opening and transports it to a mounting position, and a side plate of the inner case. two connecting shafts that are straddled and rotatably supported;
Cassette detection arms are alternately fixed to the left and right ends of each connecting shaft and are pressed by the inserted cassettes to rotate the connecting shafts separately against a spring, and each cassette sensing arm is not fixed. The lock arm is provided with lock arms fixed alternately to both left and right ends of each of the connecting shafts and disengaged from engagement with the frame by rotation of the connecting shafts.

[Effect]

In this invention, the right cassette detection arm operates the left lock arm, and the left cassette detection arm operates the right lock arm, and the locks are unlocked alternately on the left and right, so that the cassettes are not inserted diagonally. The inner lining will not move diagonally.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a schematic perspective view of the main parts, and the same or corresponding parts as those of the conventional device described above are given the same reference numerals and the explanation thereof will be omitted. In the figure, 17 and 18 are two connecting shafts that are rotatably supported across both side plates 6a and 6b of the inner case 6, and 19 is a cassette detection arm fixed to one end of the connecting shaft 17. The bent portion 19a projects into the inner cover 6 from the through hole 10a and engages with the cassette 5. A lock arm 20 is fixed to the other end of the connecting shaft 17, and a claw portion 20a at the tip engages with the lock hole 9a. 21 is the connecting shaft 18
The bent portion 21a at the lower end of the cassette detection arm is fixed to one end of the cassette detection arm, and the bent portion 21a of the lower end projects into the inner case 6 through the through hole 10b and engages with the cassette 5. 22 is a lock arm fixed to the other end of the connecting shaft 18, and the claw portion 2 at the tip
2a is engaged with the lock hole 9a.

If the cassette detection arms 19 and 21 and the lock arms 20 and 22 are provided alternately on both the left and right ends of the two connecting shafts 17 and 18 in this way, the rotation of the right cassette detection arm 19 The left lock arm 20 rotates, and the right lock arm 22 rotates as the left cassette detection arm 21 rotates, so that the cassette 5 is inserted diagonally into the right cassette as shown in FIG. Even if the detection arm 19 is rotated and the left lock arm 20 is unlocked, the right lock arm 22 will not be unlocked unless the left cassette detection arm 21 is rotated, that is, only the right side of the cassette 5 will be unlocked. In this case, the inner cover 6 does not move. In other words, insert cassette 5 right away, and then both cassette detection arms 1
If 9 and 21 are not rotated, the lock will not be released and the inner cover 6 will not start moving horizontally.

〔Effect of the invention〕

As described above, in this invention, even if a cassette is inserted diagonally and the right cassette detection arm is rotated and the left lock arm is unlocked, the right cassette detection arm will not be locked unless the left cassette detection arm is rotated. The lock arm will not be unlocked, that is, the inner cover will not move if only the right side of the cassette is inserted, so unless the cassette is inserted immediately and both cassette detection arms are rotated,
The lock will not be released and the inner cover will not start moving horizontally. Therefore, according to the present invention, the cassette in which the inner case for storing the cassette is twisted can be handled by a simple structure in which the cassette detection arm and the lock arm provided on the left and right sides are connected alternately on the left and right sides by two connecting shafts. The effect is that the cassette can be inserted stably with a good operational feel without being locked in an oblique position.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing the main parts of an embodiment of the present invention, FIG. 2 is a perspective view schematically showing a conventional device, and FIG.
The figure is a side view of Fig. 2, Fig. 4 is a schematic perspective view of main parts in Fig. 2, Fig. 5 is a side view of Fig. 4, Fig. 6 is a partial rear view of Fig. 5, and Fig. 7 is a partial rear view of Fig. 5. 5 is a side view showing the operation, and FIGS. 8 and 9 are schematic diagrams of main parts showing problems with the conventional device. In the figure, 2 is a frame, 5 is a cassette, and 6 is a frame.
6a and 6b are inner walls, 13 and 16 are springs, 17 and 18 are connecting shafts, 19 and 21 are cassette detection arms, and 20 and 22 are lock arms.
Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] 1. An inner case that is movably supported by the frame and that stores the cassette inserted from the cassette insertion slot and transports it to the mounting position, and two connecting shafts that are rotatably supported and span both sides of the inner case. , cassette detection arms that are alternately fixed to both left and right ends of each connecting shaft and rotate the connecting shafts separately against a spring when pressed by the inserted cassette; and each cassette sensing arm is fixed. A cassette attachment/detachment device for a magnetic recording/reproducing apparatus, characterized in that the cassette attachment/detachment device for a magnetic recording/reproducing apparatus is provided with lock arms fixed alternately to both left and right end sides of each of the connecting shafts and detached from engagement with the frame by rotation of the connecting shafts.