JPS61190749A - Cassette loading device - Google Patents

Abstract

PURPOSE:To attain a compact and lightweight design of a cassette loading device by setting the open/close timing of a cassette door before a cassette is shifted vertically. CONSTITUTION:A synchronous gear 7 is coupled to a drive gear 5 via a relay gear 8. The gear 7 has a cam groove 7a and a door arm 9 moves along the groove 7a to open and close a cassette door 10. The gear 7 is turned by about 30 deg. in a period during which a cassette 2 is loaded and pressed until it stops. Then the door 10 opens and closes while the gear 7 is turned. In such a constitution, the cassette 2 can be loaded with no hook between the door 10 and the cassette 2 even if a rotary fulcrum 10a is set as if the tip of the door 10 and an end of the cassette 2 were overlapped on each other when viewed horizontally. Thus the fulcrum 10a is set as shown in a figure and therefore, the horizontal shift distance of the cassette 2 is reduced. This can attain a compact and lightweight design of a cassette loading device.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a cassette mounting device in a cassette type magnetic recording/reproducing device, and in particular, a cassette mounting device suitable for miniaturization and weight reduction, such as a horta pull type magnetic recording/reproducing device. It is related to the device.

[Background of the invention]

As shown in Figure 1, conventional cassette loading devices have a long horizontal movement distance, and the fulcrum of rotation of the cassette door is set at a position where the tip of the cassette door and one end of the cassette do not overlap when viewed from the horizontal direction. . For this reason, the cassette loading device has become large, and the portable VT is designed to be small and lightweight.
It was inappropriate for R. In addition, because it is small and lightweight, the horizontal movement distance is shortened and the fulcrum of the cassette door is set at a position where the tip of the cassette door and one end of the cassette overlap when viewed from the horizontal direction. If the cassette door is opened or closed after the cassette has moved horizontally or vertically, the cassette door and the cassette may get caught, which poses a practical problem.

Also, in order to solve the above-mentioned problems, it is possible to use two cassette doors to open the door double-door, but the mechanism would be complicated and would be expensive and expensive.

Examples of this type of device include Japanese Patent Application Laid-open No. 58-12162 and Japanese Patent Application Laid-Open No. 58-164051.

[Purpose of the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cassette mounting device which eliminates the above-mentioned drawbacks, has a simple mechanism, and is small and lightweight.

[Summary of the invention]

The present invention focuses on the fact that a cassette mounting device has a function of crimping the cassette with a motor, and uses this motor to open and close the cassette door while crimping or releasing the cassette. An embodiment applied to a VTR cassette loading device will be described with reference to the drawings.

FIG. 2 shows a perspective view of the cassette holder 1 and the cassette 2 containing magnetic tape. The cassette holder 1 has a generally box-like shape and holds a cassette 2 inserted in the direction of the arrow.

FIGS. 3 and 4 show right side views of the cassette loading device.

FIG. 3 shows the cassette ejection position, and FIG. 4 shows the cassette normal mounting position. The cassette mounting device has a gate-shaped structure with a pair of side plates 3 arranged on both sides and connected by a top plate 11 on the upper surface. The side plate 3 has an L for holding and guiding the cassette holder 1.
A groove 3a is provided. A bottle 4 mounted on the cassette holder 1 is slidably passed through the L-shaped groove 3a. On the right side of the side plate 3, a pulley and a gear train are provided to obtain power from the motor. A drive arm 6 is engaged with the drive gear 5, and the bin 4 of the cassette holder 1 protruding from the side plate 3 is connected to the drive arm 6. The cassette is inserted, the switch is turned on, the motor is driven, and the cassette is installed at the installation position shown in FIG. The drive gear 5 and the drive arm 6 are connected by a torsion spring, so even if the cassette is seated in the positioning boss on the chassis, the drive gear rotates, which causes the torsion spring to deflect, and as a result, force is applied to the cassette. It is added and crimped.

Fig. 5 is a plan view of the vicinity of the power gear after crimping is completed, and Fig. 6
The figure shows a plan view of the vicinity of the power gear before crimping is completed.

The power gear 7 is connected to the drive gear 5 by a relay gear 8. The power gear 7 has a cam groove 7a as shown in the figure.
The door arm 9 moves according to the cam groove 7a and the cassette door 1
Open and close 0. The power gear 7 rotates approximately 30 degrees from the time the cassette is installed to the completion of crimping, and during this rotation, the cassette door 1
The cam groove 74 is set so that 0 opens and closes.

When the cassette door opening/closing mechanism described above is used, as shown in FIGS. 5 and 6, the rotation fulcrum 10c is such that the tip of the cassette door 10 and one end of the cassette 2 overlap when viewed from the horizontal direction.
Even if L is set, the cassette can be mounted without the cassette door 10 and the cassette 2 getting caught. As a result, by setting the rotational fulcrum 10eL as shown in the figure, the horizontal movement distance of the tray, cassette, and tray 2 is shortened. By setting the cassette before the cassette is transferred in the direction, a small and lightweight cassette mounting device becomes possible.

[Brief explanation of drawings]

Figure 1 is a side view of a conventional cassette loading device, Figure 2 is a perspective view of a cassette holder, Figure 3 is a side view of the cassette loading device (ejection position), and Figure 4 is a side view of the cassette loading device (normal loading position). ), FIG. 5 is a plan view of the vicinity of the power gear (crimping light), and FIG. 6 is a plan view of the vicinity of the power gear (before crimping). 1... Cassette holder 2... Cassette 5... Drive gear 7... Touki gear 9... Door arm 10... Cassette door 10a... Fulcrum ¥7 1
Figure i 6 2nd jump j Figure 4 Figure 5 Close

Claims (1)

[Claims] 1) Horizontal movement followed by vertical movement between a first position where the cassette can be detached and a second position where the cassette is engaged with a tape drive and can be recorded and reproduced. In a cassette transfer device that performs reciprocating motion between a first position and a second position, when the rotatable cassette door is located in the cassette insertion slot and is open, the tip of the cassette door and the vertically moving A cassette mounting device characterized by having a structure in which one end of the cassette located at the position overlaps with the other end of the cassette. 2) The cassette loading device according to claim 1, wherein a cassette door is opened and closed before the cassette is vertically transferred in the second position.