JPH01319160A - Cassette mounting device - Google Patents

Abstract

PURPOSE:To almost vertically move and mount a cassette while the cassette keeps a horizontal position by causing a supporting shaft, which is in the back of a cassette holder, to fall down with the turn of an auxiliary holder and causing the front direction of the cassette holder to simultaneously fall down with the operation of a cam roller, which is fit to a guide channel, at an almost same speed as the supporting shaft. CONSTITUTION:A supporting shaft 12b for cassette holder is arranged in the tip part of a turning arm 12 to be supported by a supporting shaft 12a, which is provided in the front direction of a base stand 2, with being freely turnable. Then, a cam roller 13 is arranged in an internal part to be interlocked with an auxiliary holder 11. In the central part of a cassette holder 4 which is supported by the supporting shaft 12b, a cam roller 14 is samely provided so as to be interlocked with the auxiliary holder 11. To the auxiliary holder 11 which is supported by a supporting shaft 3a in the back of the base stand 2 with being freely turnable, the two cam rollers 13 and 14 are fit and the turning arm 12 and cassette holder 4 are moved with being interlocked. Then, two guide channels 11b and 11c are provided so that the cassette holder 4 can keep the horizontal position. Thus, while the cassette keeps the horizontal position, the cassette can be moved and mounted almost vertically.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cassette loading device used in a video tape recorder.

(Prior Art) Regarding the conventional cassette loading device, FIGS.
This will be explained using figures.

FIG. 6 is a side view of a conventional cassette loading device. The cassette loading device has a positioning pin 2a and a height determining pin 2b arranged at the loading position of the cassette 1, and a recording/reproducing functional component (not shown). ), and a cassette holder 4 that accommodates the cassette 1 and is rotatably supported on a support shaft 3a of a support stand 3 fixed to the rear of the base 2 (on the left side in the figure).

The rear end of the cassette holder 4 is bent into a bell crank shape, and a hook hole 4a is formed at the tip, and between the cassette holder 4 and the hook bin 2c installed in the middle of the side surface of the base 2,
It is always biased in the counterclockwise direction shown by arrow A by the stretched tension coil spring 5. Further, the cassette holder 4 biased in this manner is regulated by a stopper pin 3b implanted in the support base 3, and is configured to stop at an insertion position having an inclination of about 30''. The holder 4 is formed with a stopper 4b that determines the position of the inserted cassette 1, and a suppressing leaf spring 4d that presses the cassette 1 against the bottom surface 4c as shown by arrow B.
A front panel 6 of a video tape recorder is depicted in front of the base 2 described above.

The operation of the cassette loading device configured as described above will be explained.

First, insert the cassette l into the cassette holder 4 as shown by arrow C until it hits the stopper 4b. Since the cassette 1 bends the pressing leaf spring 4d, the cassette 1 comes into close contact with the bottom surface 4C due to its elastic repulsive force. Next, when the cassette holder 4 is pushed down in the direction of the arrow A, it rotates clockwise about the support shaft 3a as shown by the arrow while resisting the biasing force of the tension coil spring 5. As shown in the figure, it is mounted in a fixed position on the base 2 by the action of the positioning pin 2a and the height determining pin 2b.

Note that the cassette holder 4 is fixed in the state shown in FIG. 7 by a locking device (not shown). Also, tape guard panel 1 that covered the front of cassette 1 (left side in the figure)
a is opened by an opener (not shown) mounted on the base, and the magnetic tape (not shown) is exposed.

To take out the cassette 1, the cassette can be taken out from the cassette holder 4 by releasing the locking device and returning to the taking out position shown in FIG. 6 in the reverse order.

(Problem M to be Solved by the Invention) However, in the above configuration, since the cassette holder 4 rotates, the cassette 1 is mounted at a fixed position on the base 2 while drawing a circular arc. To explain this situation with the enlarged cross-sectional view of the main part in FIG. It is installed like this.

Cassette 1 housed in cassette holder 4 (not shown)
rotates as shown by arrow E around the support shaft 3a, so the trajectories of the inner wall 1b of the cassette 1 and the magnetic tape 9 become circular arcs m and n around the support shaft 3a, respectively.

Therefore, the gap between the inner filb and the guide post 7, indicated by the dimension line ΔX, is the same as the dimension line Δx2 during the mounting process, and the gap between the magnetic tape 9 and the guide roller 8, indicated by the dimension line ΔX, is the same. In the process of mounting, the dimension line ΔX decreases. Therefore, there was a problem in that there was very little clearance margin to avoid interference with functional components. As a countermeasure for this, if the position of the support shaft 3a is moved apart and the circular arc is made larger, there is also the problem that the five dimensions become larger.

Further, as shown in FIG. 9, if the cassette holder 4 is pushed down while the cassette 1 is not inserted enough to reach the stopper 4b of the cassette holder 4, it will rotate clockwise as shown by the arrow and then move forward. It will stop when it hits the top edge of the panel 6. At that time, there was a problem that the tape guard panel 1a opened and the magnetic tape 9 that was about to be exposed came into contact with the upper end surface of the guide post 7 and was bent and damaged.

The present invention solves the above problems and provides a cassette mounting device in which the cassette is moved and mounted substantially vertically while maintaining its horizontal position.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a cassette holder at the tip of a rotating arm rotatably supported on a support shaft provided in front of a base. A cam roller is placed inside the support shaft for interlocking with the newly installed auxiliary holder, and the newly installed auxiliary holder is placed in the center of the cassette holder supported by the support shaft. The two cam rollers are fitted into the auxiliary holder, which is rotatably supported on a support shaft at the rear of the base. Two guide grooves are provided to move the cassette holder in conjunction with each other and keep the cassette holder in a horizontal position.

(Function) With the above configuration, the support shaft at the rear of the cassette holder descends as the auxiliary holder rotates, and at the same time, the front of the cassette holder moves at almost the same speed as the support shaft above due to the action of the cam roller fitted in the guide groove. As it descends, it moves in the vertical direction shown by arrow H in FIG. 8 and arrow H in FIG. 10 while maintaining a horizontal attitude.

Therefore, the gaps ΔX and Δx3 shown in FIG. 8 can be used effectively as they are. Furthermore, if the cassette holder is not fully inserted into the cassette holder, the cassette 1 will only hit the tip of the front panel 6, and the magnetic tape 9 will not hit the guide post 7, as shown in FIG.

(Example) An example of the present invention is shown in Figures 1 to 5P! This will be explained by iI.

1 and 2 are both side views of a cassette loading device according to the present invention. Note that the same components as in the conventional example shown in FIG. 6 are given the same reference numerals.

In FIG. 1, the base 2 includes the same positioning pins 2a, height determining pins 2b, hook pins 2c, and rear support stand 3 as in the conventional example, as well as the tape of the cassette 1, which is not shown in FIG. Opener 2d that opens guard panel la;
A lock pin 2e of the locking device is placed between the positioning pin 2a and the height determining pin 2b, and a support stand 10 is newly added to the front.
are arranged respectively.

An auxiliary holder 1 is attached to the support shaft 3a of the rear support stand 3.
1 is pivotally supported, and is always rotated in the direction of arrow A by a tension coil spring 5 stretched between a hook hole 11a formed at the bell crank-shaped tip and a hook pin 2c planted on the side surface of the base 2. It is biased in the counterclockwise direction as shown in FIG. A support shaft 12a implanted at the end of the rotation arm 12 is fitted to rotatably support the rotation arm 12.A cassette is attached to the support shaft 12b implanted at the tip of the rotation arm 12. The holder 4 is rotatably supported,
Furthermore, a cam roller 13 for interlocking with the above-mentioned auxiliary holder 11 is mounted inside the cam roller 13 . A cam roller 14 for interlocking with the auxiliary holder 11 is installed approximately in the center of the cassette holder 4, as well as a stopper 4b, which is the same as in the conventional example, and a suppression pad 4d, which replaces the conventional pressing leaf spring 4d. is provided.

Further, on the side surface of the auxiliary holder 11, there is a guide groove 11b in the elongated direction into which the cam roller 13 of the rotating arm 12 fits, and a cam roller 14 of the cassette holder 4.
Fits in. A guide groove 11c whose rear side is curved upward is formed respectively.

A lock lever that engages with the lock pin 2e of the base 2 described above.
15 is a support shaft li implanted in the above-mentioned auxiliary holder 11.
A tension coil spring is rotatably attached to d and stretched between a hook hole 15a formed at the end thereof and a hook hole (not shown) of a drawer protrusion Lie formed in the auxiliary holder 11. 16 in the counterclockwise direction, and is further regulated by a stopper pin llf implanted in the above-mentioned auxiliary holder 1, so as to be perpendicular to the auxiliary holder 11.

Note that an engaging hook-shaped portion 15c having a guide surface 15b is formed at the tip of the lock lever 15.

Moving on to FIG. 2, a crimp plate 17 is attached to a support shaft 4e implanted in a bracket formed on the upper surface of the cassette holder 4.
is rotatably supported on the shaft, and is biased counterclockwise by a biasing device (not shown) so that the ceiling surface 1 of the auxiliary holder 11
1 & with contact pressure.

It is pressed clockwise against the cassette holder 4.

The operation of the cassette loading device configured as described above will be explained.

In FIG. 1, the cassette loading device is in a standby state in which the cassette 1 can be inserted, so first insert the cassette 11 into the cassette holder 4 from the direction shown by arrow C with the tape guard panel 1a in front, and then Push it in until it stops at the stopper 4b as shown in Figure 2. Next, in FIG. 2, when the upper surface of the auxiliary holder 11 is pushed down as shown by the arrow P, the auxiliary holder 11 is moved clockwise around the support shaft 3a as shown by the arrow while pushing the tension coil spring 5. The rotation arm 12 rotates to push down the rotation arm 12 and the cassette holder 4 via the two cam rollers 13 and 14 that fit into the two guide grooves 11b and llc, and the rotation arm 12 rotates around the bearing hole 10a. The support shaft 12a rotates counterclockwise as shown by the arrow, and is implanted at the tip of the support shaft 12a.
lower the height. On the other hand, the cassette holder 4 has its rear connected to a support shaft 12a whose height gradually decreases, and its front connected to a cam roller 14 fitted in a downwardly convex arc-shaped guide groove 11c formed in the auxiliary holder 11. Since they are each supported, the cassette holder 4 descends along an arc p drawn centering on the bearing hole 10a in FIG. 1 while maintaining a horizontal posture.

Since the arc p can be set larger than the arc n centered on the support shaft 3a shown in FIG.
The amount of decrease in the gap between the magnetic tape 9 and recording/reproducing functional components such as the guide post 7 and the guide roller 8 is significantly reduced.

As the auxiliary holder 11 rotates in the clockwise direction shown by the arrow, the state shown in FIG. 3 is changed to the mounted state shown in FIG. 4.

Since the shapes of the two guide grooves 11b and lie of the auxiliary holder 11 are both formed so that the width becomes wider at the rear end, when the cam rollers 13 and 14 are installed, they are released from the guide grooves 11b and ILc. The pressure bonding plate 17 of the auxiliary holder 11 and the pressing pad 4d of the cassette holder 4 are responsible for maintaining the posture of the cassette 1.

In FIG. 5, as the auxiliary holder 11 rotates.

The lock lever 15 that is pivotally supported by this also descends in a circular arc, and the guide surface tsb formed at the tip rides on the lock bin 2e of the platform 2, and rotates clockwise while stretching the tension coil spring 16. With the cassette 1 positioned by the positioning pin 2a and the height determining pin 2b, the engaging hook portion 15c engages with the locking pin 2e and is fixed at the mounting position. In this state, as described above, the cassette 1 is moved to the shoulder surface of the step part of the positioning pin 2a and the height determining pin 2 by the action of the crimp plate 17 and the pressing pad 4d.
It is fixed in close contact with the tip surface of b. Note that the tape guard panel 1a of the cassette 1 is opened by the opener 2d of the base 2 during the rotation process. Recording and reproduction are performed in this state.

The procedure for taking out the cassette 1 is to rotate the tip of the lock lever 15 clockwise to release the engagement between the hook-shaped portion 15c and the lock pin 2e. Rotate counterclockwise as indicated by arrow A, and reverse the mounting procedure described above.

Since it returns to the standby state shown in Fig. 2, the cassette holder 4
Cassette 1 can be taken out from there.

As mentioned above, since the cassette 1 descends almost vertically along a large circular arc while maintaining a horizontal posture, the gap between the guide post 7 and the guide roll 8 is reduced by 11, and the insertion of the cassette 1 is made easier. Even if it is insufficient, as shown in FIG. 10, the main body of the cassette 1 comes into contact with the front panel 6 and stops, so the magnetic tape 9 does not come into contact with the guide roll 8 and is therefore not damaged. .

(Effects of the Invention) As explained above, according to the present invention, the cassette moves up and down almost vertically along a large circular arc while remaining in a horizontal position, so there is a gap to avoid interference with functional parts for recording and playback. The amount of decrease in the magnetic tape is small, and even if the cassette is not fully inserted, there is no risk that the magnetic tape will come into contact with the functional parts, so a highly reliable cassette mounting device that is easy to handle can be obtained.

[Brief explanation of the drawing]

1 and 2 are both side views of the cassette loading device according to the present invention, FIGS. 3 and 4 are side views for explaining its operation, and FIG. 5 is a side view of the cassette loading device,
Fig. 6 is a side view of a conventional cassette loading device, Fig. 7 is a side view of the cassette loading device, Fig. 8 is an enlarged sectional view of its main parts, and Figs. FIG. 3 is a side view of a main part for explaining the operation of the state. 1...cassette, la...tape guard panel,
1b...Inner wall, 2...Base, 2a...Positioning bin, 2b...Height deciding bin, 2c...Hook bin, 2d...Opener. 2e...lock bin, 3,10...support stand, 3a
, 4ae 11d+ 12a, 12b''・Support shaft, 3b, llf...stopper bin, 3c, 4b...
・Stopper, 4...Cassette holder, 4a+l
la, 15a... hook hole, 4c=-bottom, 4
d...Press plate spring, 4e...Suppression pad, 5.1
6... Tension coil spring, 6... Front panel, 7... Guide post, 8...
-Guide roller, 9...Magnetic tape. 10a...Bearing hole, 11...Auxiliary holder, 11b,
llc...guide groove, lla...drawer protrusion, 1
2...Rotating arm, 13.14...Cam roller, 1
5... Lock lever - 1tsb... Guide surface, 15c
... Engaging hook-shaped portion, 17... Crimping plate. Patent applicant Matsushita Electric Industrial Co., Ltd.-! ! llN recognition 388 Yoshitai χ 93(v'
) -s -mouth 1) of etsuFig. Support axis 7・-@four mast 8・・・＄sO−”y 9− Tree a-tape Fig. 9 1”° Force tJ 3a...East support axis 1a
・〒-10 card? VneL 6…”I1chiI
Marenru 2 Maku'6 7. Okuuchi da strike 3... Support name 9... Tachibana Qi 7゜ Figure 10 1--1 Beggar 1. To 1a--Chi complete card 1\11 6--Kessinozu Neru 7--Shinai host 0 strike 9-a Fox Chi.

Claims (1)

[Claims] In a cassette mounting device that transports and mounts a cassette to a mounting position using rotational movement around a support shaft provided at the rear of the base, the cassette is rotatably mounted on a support shaft provided at the front of the base. The cassette holder is supported on a shaft, and a cam roller is attached to the tip of the cassette holder, which is the center of rotation of the cassette holder, and a cam roller is attached to the auxiliary holder, which is rotatably supported around the rear support shaft. a rotating arm, a cassette holder that is rotatably supported on the support shaft of the rotating arm, and has a cam roller attached to its center for interlocking with the auxiliary holder; A cassette mounting device comprising: an auxiliary holder having two guide grooves that fit together to transmit rotational motion and allow the cassette holder to maintain a substantially horizontal posture during rotation.