JPS61206955A - Front loading device - Google Patents

Abstract

PURPOSE:To enhance sure operation by constituting a positioning member to couple to the tape end detecting window of a tape cassette in the state of horizontal movement of a cassette holder. CONSTITUTION:When a tape cassette 13 is inserted to a cassette holder 14 in the direction of an arrow mark A, the tape cassette enters rotating an entrance cover 12 clockwise by the tip, and a positioning member 18 of the cassette holder 14 is engaged to a tape end detecting window 19 with its upper face pressed by the pressing lever 15 of the cassette holder 14. Here, a position detecting section 16 of the cassette holder 14 turns a position detecting switch 17 on to drive a driving mechanism to make loading in the direction of the arrow mark A. When the tape cassette 13 arrives at a position B, the cassette cover 22 of the tape cassette 13 is turned clockwise, and attached to a tape driving section in an opened state.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a video tape recorder (hereinafter referred to as a VTR) which promotes the miniaturization of, for example, a Brnm video tape recorder.
This invention relates to a front loading device suitable for

[Technical Background of the Invention and Problems Therewith] Recently, VTRs have been developed that use a tape cassette called a 3 mm videotape cassette and are configured to effectively promote miniaturization. By the way, VTRs that have been miniaturized in this way use tape cassettes that are about 1/4 smaller than conventional 1/2-inch video tape cassettes, which eliminates various problems. was occurring.

For example, as shown in FIG. 5, the tape cassette 2 inserted into the cassette holder 1 is moved approximately horizontally, and then,
There is a front loading device that moves the device approximately vertically and places it in a predetermined position.

In this case, the cassette holder 1 is provided with a presser lever 3 on its upper side for pressing the tape cassette, and on its lower surface is a plate spring that is engaged with the positioning hole 4 of the tape cassette, as shown in FIG. A member 5 is provided. Immediately before the tape cassette 2 is inserted into the cassette holder 1 and comes into contact with the stopper 6, the cassette detection switch 7 is turned on and the drive mechanism (not shown) is driven to move the tape cassette to a predetermined position as described above. Attach it to the drive position.

However, due to the structure of the front loading device, when applied to a VTR using an 8mm video tape cassette, the cassette lid 8 provided on the tape cassette 2
Since the optimum area where the opening/closing trajectory of the cassette holder 1 can be avoided, and where it can be stably pressed against the reel stand (not shown) is much narrower than that of the 1/2 inch video tape cassette, the inlet cover (not shown) of the cassette holder 1 is There is a fear that the presser lever 3 may come into contact with the presser lever 3 and not move in the desired state. Also, according to this, the tape cassette 2
Due to the structure in which the leaf spring member 5 for positioning is disposed on the lower surface of the cassette holder 1, the size of the cassette holder 1 is inevitably increased, so there is also the problem that it is not suitable for promoting downsizing.

[Objective of the Invention J This invention has been made in view of the above circumstances, and has a simple configuration, can effectively promote miniaturization, and improves the reliability of operation as much as possible. The object of the present invention is to provide a front-loading device that can perform the following tasks.

[Summary of the Invention] That is, the present invention provides a cassette holder into which a tape cassette is inserted with a positioning member that is movable in and out corresponding to the tape end detection window of the tape cassette, and the positioning member is moved in a horizontally moving state of the cassette holder. By configuring it to engage with the tape end detection window of the tape cassette, the intended purpose has been achieved.

Embodiments of the Invention Hereinafter, embodiments of the invention will be described in detail with reference to the drawings.

FIG. 1 shows a front loading device according to an embodiment of the present invention, in which reference numeral 10 denotes a mounting structure formed, for example, in a substantially U-shape, and guide grooves 1 in an abbreviated shape on both sides thereof.
1 are formed in substantially the same way, and an inlet cover 12 is provided on one part thereof so as to be openable and closable. For this installation, a cassette holder 14 into which, for example, a 3 mm video tape cassette (hereinafter referred to as tape cassette) 13 is inserted is provided in the structure 1o. The cassette holder 14 has its both sides mounted in the guide grooves 11 of the structure 10 so as to be freely guided, and a presser lever 15 for holding the cassette is provided on the top surface thereof.

Further, as shown in FIG. 2, the cassette holder 14 has a position detecting section 16 formed at its distal end corresponding to the detecting section 171 of the position detecting switch 17 provided on the body structure 10, and the position detecting section 16 is formed on both sides thereof. For example, in substantially the same way, for example, elastic positioning members 18 for positioning the cassette are formed corresponding to the tape end detection windows 19 provided in the tape cassette. And the above installation is the structure 1
Protrusions and peaks 20 for driving and controlling the positioning member 18 are formed on both sides of the guide groove 20, respectively, in correspondence with the guide grooves.

Here, 21 in the figure is a cassette holder provided on the cassette holder 14.

That is, when the tape cassette 13 is inserted into the cassette holder 14 in the direction of the arrow, the front loading device rotates the inlet M12 clockwise in the figure with its tip, as shown in FIG. 3(a). The positioning member 18 of the cassette holder 14 is engaged with the tape end detection window 19 in a state where the upper surface portion is pressed by the presser lever 15 of the cassette holder 14 . Here, the cassette holder 14 has its position detecting section 1
6 is loaded in the direction of the arrow by turning on the position detection switch 17 and driving a drive mechanism (not shown). Then, the cassette holder 14 uses its positioning member 18 to apply the acting force F to the cassette lid 22 of the tape cassette 13.
The mounting is guided by the guide groove 11 of the structure 1o and moved horizontally to the 8th position while being regulated by being applied in the closing direction (counterclockwise in the figure). When the tape cassette 13 reaches position B, it is guided by the guide groove 11 and lowered to a predetermined driving position, and the cassette lid 22 of the tape cassette 13 is opened as shown in FIG. 3(b). It is rotated clockwise in the figure and attached to a tape drive unit (not shown) in an open state. At this time, the cassette holder 14
is engaged with the tape end detection window 19 in a state in which the positioning member 18 reaches the above-mentioned position B while resisting the spring force and is in position restricted by contacting the protrusion 20 of the structure 10;
As the positioning member 18 descends, the positioning member 18 moves toward the protrusion 2.
0 and is separated from the tape end detection window 19 by its spring force. Here, in the tape cassette 13, as the cassette lid 22 rotates, the tape end detection window 19 is moved from the D position to the E position in relation to the rotation center axis C. The positioning member 18 does not interfere with the optical axis of an end sensor (not shown).

Incidentally, the tape end detection window 19 of the cassette lid 22 is aligned with a hole provided on the side surface of the main body of the tape cassette 13 at the E position, so that tape end detection can be performed.

In this manner, the front loading device is provided with a positioning member 18 that can be freely moved in and out in correspondence with the tape end detection window 19 of the tape cassette 13, and the cassette holder 14
Since the tape end detection window 19 is configured to engage with the tape end detection window 19 in a horizontally moving state, the tape end detection window 19 can be made as thin as possible compared to the conventional tape end detection window 19, and the operation can be made as reliable as possible. This can be improved and can effectively promote miniaturization. According to this, due to its structure, especially the installation is
Since the positional relationship with the opening/closing trajectory G of the inlet cover 12 can be made as narrow as possible, it is possible to promote miniaturization.

Further, in the above embodiment, the present invention has been described in the case where the protrusion part 20 for drive control is provided corresponding to the positioning member 18, but the present invention is not limited to this, and for example, as shown in FIG. Substantially the same effect can be expected even if a through hole 23 is provided in the hole 23 and the positioning member 18 is driven and controlled by the through hole 23.

Further, although the above embodiment has been explained using an 8mm video tape cassette, substantially the same effect can be expected even if the present invention is applied to a VTR using a so-called 1/2 inch video tape cassette. .

Note that this invention is not limited to the above-mentioned embodiments (in addition,
It goes without saying that various modifications can be made without departing from the spirit of the invention.

[Brief explanation of the drawing]

FIG. 11 is a perspective view showing a front loading device according to an embodiment of the present invention, FIG. 2 is a sectional view showing the main part of FIG. 1, and the third factor is shown to explain the operation of FIG. 1. FIG. 4 is a sectional view showing another embodiment of the present invention;
FIGS. 5 and 6 are a perspective view and a sectional view, respectively, showing a conventional front loading device. 10... Mounting on the structure, 11... Guide groove, 12...
Entrance lid, 13... Tape cassette, 14... Cassette holder, 15... Presser lever, 16... Position detection unit, 17... Position detection switch, 18... Positioning member, 19...・Tape end detection window, 20...Protrusion, 21...Cassette holder, 22...Cassette lid,
23...Through hole. Figure 1 Figure 2 Cause Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] In a front loading device that moves a tape cassette inserted into a cassette holder substantially horizontally, and then moves it substantially vertically and places it at a predetermined position, the cassette holder is provided with a tape end detection window of the tape cassette. A front loading device comprising: a positioning member that can be freely moved in and out; the positioning member is configured to engage with a tape end detection window of the tape cassette when the cassette holder is in a horizontal movement state.