JPS6337850A - Cassette loading device - Google Patents

Abstract

PURPOSE:To stabilize the cassette position with a simple structure and to prevent a double insertion by providing such composition that the member pressing the back face of a cassette prohibits the insertion of another cassette after completion of the charging of the cassette during the movement of a cassette holder to the charging completion position. CONSTITUTION:A lever 4 is energized in a counter-clockwise direction by a spring 5. The leg part 4a of the lever 4 is locked by a cassette holder 3 this time, and a backing plate 6 and the boss 4b of the lever 4 receive the force of the spring 5. A cassette 1 is inserted into the cassette holder 3 and descended after moving it horizontally, then, the lever 4 for preventing duplication is rotated with the movement of the cassette holder 3 and the leg part 4a presses the rear part of the cassette 1. In case of inserting 2nd cassette 9 the back face 4c of the lever 4 abuts the cassette 9 and the insertion is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a cassette holder for holding and transporting a cassette containing a tape-shaped recording medium, which is reciprocated between a cassette insertion position and a loading completion position. The present invention relates to a mounting device.

[Prior Art] In a device that pulls out a magnetic tape stored in a VTR-7 cassette and records and plays signals on the pulled-out tape, it is necessary to determine the position where the cassette is attached to and removed from the device body and the recording and playback. It is common to move between loading and unloading positions. The position of the cassette in the cassette holder must be precisely defined so that this movement can be accomplished by moving the cassette holder that holds the cassette, or the cassette can be guided to a predetermined position in the device.

For this reason, a cassette holding mechanism has been conventionally used to press the cassette within the cassette holder.

On the other hand, this type of cassette is provided with a lid to protect the magnetic tape. FIG. 2 shows this type of cassette, in which 1 is the cassette body, la is the lid, and lb is a fulcrum that rotatably holds 11a relative to the cassette body. While the cassette holder is moving from the cassette attachment/detachment position to the cassette loading completion position, a pin (not shown) contacts the lid 13 and rotates the lid in the direction indicated by a in the figure. As a result, a force in the direction shown in b acts on the cassette in the cassette holder, sometimes changing the position of the cassette in the cassette holder.

On the other hand, the aforementioned cassette holding mechanism is usually attached to the side plate of the cassette holder and presses points A and H in FIG. The pressing force of this holding mechanism is not very large in consideration of smooth attachment and detachment of the cassette. On the other hand, since the force to open the lid as described above is quite large, the pressing force when opening the lid is not sufficient, so it is necessary to provide an auxiliary suppression mechanism to press the point C in Figure 2 when the cassette is moved. or desirable.

Incidentally, in recent years, VTRs have generally been of the so-called front-loading type, which detects that the user has inserted a cassette into the cassette insertion slot and automatically moves the cassette to the loading completion position. In front-loading VTRs like this, it is difficult to tell from the outside whether a cassette is loaded or not, so if a cassette is loaded, insert a different cassette (
duplicate insertions) must be prevented.

FIGS. 3(a) and 3(b) are diagrams for explaining the conventional double insertion prevention mechanism, in which 1 is a cassette, 2 is a cassette insertion slot, 3 is a cassette holder, and 7 is a double insertion prevention lever. , 8 is a fly.

As shown in FIG. 3(a), when the cassette 1 is inserted into the insertion slot 2 and before it is attached to the cassette holder 3, the double insertion prevention lever 7 (having a fulcrum) is positioned at the bottom of the insertion slot 2. Then, after inserting the 0th order cartridge 1 into the cassette holder 3, which is in a standby state with force stored by the spring 8 in order to rotate in the direction of the arrow E in the figure, the rotation of the double insertion prevention lever 7 is stopped.
Since the cassette holder 3, which was positioned as a collar, moves as shown, the lever 7 rotates and stops at the position shown in FIG. 3(b). If an attempt is made to insert the second cassette by mistake, this double insertion prevention lever 7 will block the inside of the insertion slot 2, preventing the second cassette from being inserted.

[Problems to be Solved by the Invention] Incidentally, although the above-mentioned double insertion prevention mechanism must be provided near the cassette insertion slot 2, the above-mentioned auxiliary cassette pressing mechanism is also provided as shown in FIG. 3(b). Since the part shown in C is pressed as the cassette descends, it must be placed in the same position. However, with the miniaturization of cassettes, there is less space available when placing two such mechanisms in the same position, and these two functions are
To achieve this, an extremely precise mechanism was required.

The present invention was made to solve these problems, and an object of the present invention is to provide a cassette mounting device that can stabilize the position of cassettes and prevent duplicate insertion with an extremely simple configuration.

[Means for Solving the Problems] In the cassette loading device according to the present invention, while the cassette holder is being moved to the cassette loading completion position, the member that presses the back of the cassette does not allow the insertion of another cassette after the loading of the cassette is completed. The configuration is such that it is prohibited.

[Operation] By configuring as described above, the same member can prevent the repeated insertion of cassettes and accurately define the position of the cassettes, resulting in a mechanism arrangement with ample space.

[￥Example Co. An embodiment of the present invention will be described below.

FIG. 4 is a diagram showing a cassette holder of a cassette mounting device as an embodiment of the present invention, and FIG. 5 is a diagram showing a drive mechanism of the cassette holder shown in FIG. 4. In the figure, 4 is a rotating lever which will be described in detail later, 10 is a holder body, 11 is a bent portion on the cassette insertion side, 12a and 12b are stoppers for locking the ends of the cassette, and 13a and 13b are holder body 10. The integrally molded side walls 14a, 14b, 15a, 15b are each drive shafts driven by a cassette drive mechanism.

In FIG. 5, 21 is the drive f) J mechanism main body, 22a.

Reference numerals 22b are guide grooves formed in the side plates 23 of the main body 21, respectively, into which the aforementioned drive shafts 14a and 15a'bi are fitted.

In addition, the guide yt22 is also provided on the side plate 24 opposite to the side plate 23.
c, 22d are formed. 25 has a motor,
Rotation of the motor 25 is transmitted to the rotary plate 28 via idlers 26,27.

A connecting rod 29 connects the outer diameter portion of the rotating plate and the drive shaft 14a, and when the rotating plate 28 rotates counterclockwise, the driving shaft 14a moves in the direction of the arrow 30 in the figure via the connecting rod 29. Also, each shaft 14a, 15a, 14
b, 15b are guide grooves 22a, 22b, 22c, 22, respectively.
Move to d by ff1-1. 31 is cassette insertion slot 3
The window is rotatably supported on both side plates 23 and 24. The cassette is inserted by the user through the window 31 and is brought into contact with the strike bar 12a of the holder body. When the cassette is further pushed in the insertion direction, a switch (not shown) is turned on and the motor 25 is turned on.
The cassette holder main body 1
0 moves in the insertion direction and then moves downward to complete loading the cassette. FIG. 1 is a side view showing the main parts of a cassette loading device according to an embodiment of the present invention. Reference numeral 4 denotes the aforementioned rotary lever, which rotates around a shaft 3 supported by a drive mechanism main body 21. 5 is a spring, 6 is a back plate integrally molded to the drive mechanism main body 21, and 9 is a second kayak.

FIG. 1(a) shows the state before the cassette is loaded, and FIG. 1(b) shows the state while the cassette is being loaded. First, in FIG. 1(a), the lever 4 is urged counterclockwise in the figure by the spring 5, and is in a state of storing rotational force. At this time, the leg portion 4a of the lever 4 is locked by the cassette halter 3, and the hack plate 6
and receives the force of the boss 4b of the lever 4 or the spring 5. Then, when the cassette l is inserted into the cassette holder 3, moved horizontally, and then lowered, the state changes to that shown in FIG. As shown in FIG. 1(b), the lever 4 rotates with the movement of the lever 4, and presses down the leg 4a of the lever 4 or the rear part of the cassette l (applying a pressing force to the section C in FIG. 2). If an attempt is made to insert the second cassette by mistake, the back surface 4C of the lever 4 comes into contact with the cassette 9 to be inserted, and this cassette 9 is prevented from being inserted.

[Second Advantageous Effects] As explained above, the cassette mounting device of the present invention is equipped with a member that has the function of suppressing the kayak 1 to the rear to stabilize the position of the cassette, and also serves as a mechanism to prevent duplicate cassette insertion. Eventually, one member could perform two functions, simplifying the device and reducing the number of parts.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view schematically showing the main parts of a cassette loading device showing an embodiment of the present invention, Fig. 2 is a view showing a cassette, and Fig. 3 is a double insertion prevention mechanism in a conventional cassette loading device. FIG. 4 is a diagram showing a cassette holder according to the practical example of the first Q, and FIG. 5 is a diagram showing a drive mechanism of the cassette holder shown in FIG. 4. In the figure. ■・Cassette 2 ・Insertion slot 4 Rotating lever 5 Hanging 6 Back plate 10 ・Kaya・ntholder agent Patent attorney 1) Harudai Kitatake 3 (¥1 Figure 4)

Claims (1)

[Claims] In a cassette loading device that reciprocates a cassette holder that holds and conveys a cassette that stores a tape-shaped recording medium between a cassette insertion position and a loading completion position, while the cassette holder is moving to the loading completion position, A cassette loading device characterized in that a member pressing the back side prohibits insertion of another cassette after loading of the cassette is completed.