JPH03225664A - cassette loading device - Google Patents

Abstract

PURPOSE:To push forward a cassette into an appropriate position with a sliding lever by constituting a cassette holder by superposing plural leaf spring made of different metal in thermal expansion coefft. from each other and displacing them in responding to the temp. CONSTITUTION:The leaf springs 20 and 21 are made of different metal in thermal expansion coefft. from each other and superposed with each other and then fixed with a fixing pin 9 and a coupling pin 22. Then, the cassette holder 2 is constituted of the springs 20 and 21, the pins 9 and 22 and a pressing member 8. Now, for instance, when the thermal expansion coefft. of the leaf spring 20 is smaller than that of the leaf spring 21, the position of the pressing member 8 is receded from the cassette 1 when the temp. is low, and is moved so as to approach it when the temp. is high. Then, when the cassette is positioned in an inserting position of the holder 2, bending amts. of the leaf springs 20 and 21 are changed in accordance with the temp., and hence holding force of the cassette 1 is changed as well. Consequently, malfunction dies not take place whatever the temp. is high or low, and the cassette 1 is pushed forward by the slide lever to an appropriate position in the holder within a whole using range.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cassette loading device including a cassette holding means provided on a cassette holder and holding a cassette within the cassette holder.

[Prior Art] Figures 5A to 5D show a digital audio tape recorder (DA) as a conventional cassette loading device.
Figure 6 is an enlarged sectional view of the cassette holder shown in Figures 5A to 5D, Figure 7
The figure is a plan view of FIG. 6, in which 1 is a cassette in which a magnetic tape is stored, 2 is a cassette boulder 3 that stores cassette 1 and moves between a cassette insertion position and a cassette mounting position. 4 is a frame that guides the movement of the slide lever 3 via a guide pin; 5 is a slide lever that moves along a guide hole (not shown) formed in the frame 4; Guide pins 1 and 6 are shaped on both sides of the top surface of cassette holder 2. ? -71 A plate spring whose 7 binding part is fixed to the cassette holder 2 with a fixed snap and has a pressing member 8 at the tip, 10 is a flenometer, and moves along a guide hole (not shown) formed in 4. The second guide pin 11 is a deck base on which a capstan motor (not shown), a reel (not shown), etc. are attached.

Next, the operation of the DAT having the above configuration will be explained. In the loading operation of the cassette 1, when the cassette /l-1 is inserted into the cassette holder 2, the cassette 1 comes into contact with the tip of the slide lever 3 and is held in the cassette holder 2 (see Figs. 5A and 8). (See Figure 9).

From this cassette insertion position, when cassette 1 is manually pushed in the direction of arrow A with a stronger force than when inserting cassette 1, slide lever 3 is further moved by cassette 1 and comes into contact with the start switch (not shown). (See Figure 5B).

When the start switch is activated, the cassette/litter holder drive mechanism (not shown) is driven, and the cassette 1 and cassette boulder 2 move together in the direction of arrow B, and when they reach a predetermined position. Due to the action of a reversing spring (not shown), the slide lever 3 separates from the cassette 1 and moves further to the back (see FIG. 5C).

The barley, cassette holder 2 and water cassette l-1
moves downward to a predetermined mounting position (see Figure 5D).

When moving from the cassette mounting position of the cassette 1 shown in 5Dl13 to the cassette insertion position of the cassette 1 shown in FIG. do. During the movement, the slide lever 3 pushes the cassette 1 to the insertion position of the cassette due to the spring force of the reversing spring. At this time, the cassette is prevented from flying out from the cassette holder 2 due to the spring force of the leaf plate and the noa.

[Problems to be Solved by the Invention] In the conventional DAT as described above, at low temperatures, the viscosity of the grease for smooth operation between the component parts decreases, and the coefficient of friction between the component parts increases. As the mechanical load increases, the spring energy of the reversing spring decreases, and the energy for pushing out the slide lever 3 or the cassette 1 decreases, causing the problem that the cassette 1 or the cassette may not be ejected to the cassette insertion position. Ta.

In addition, when the temperature is high, the mechanical load decreases and the spring energy of the reversing spring increases, so the energy that slides and pushes out the cassette 1 increases, and the cassette/Ito 1 does not stay at the cassette insertion position. There was a problem in that it could fly out to the outside.

The present invention has been made to solve these problems, and an object of the present invention is to provide a cassette loading device in which the cassette can be pushed out to an appropriate position by a slide lever over the entire operating temperature range.

F, 7! Means for Solving the Problem] In the cassette loading device according to the present invention, the cassette holding means for holding the cassette in the cassette boulder includes a first leaf spring and a second leaf spring made of metals having different coefficients of thermal expansion.
It is constructed by overlapping leaf springs.

[Function] In the present invention, the cassette holding means is displaced in a direction away from the cassette when the temperature is low, and is displaced toward the cassette when the temperature is high.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a main part of a DAT cassette holder showing an embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1.
The same or equivalent parts as in FIGS. 5 to 8 are designated by the same reference numerals, and the explanation thereof will be omitted.

In the figure, 20 is a first plate spring made of stainless steel whose base end is fixed to the cassette holder 2 as a fixed bottle and has a presser member 8 at the tip end, and 21 is a first plate spring 20.
A second leaf spring made of brass material is superimposed on the first leaf spring 20 and fixed to the first leaf spring 20 by a fixed pin and a connecting pin 22, and the first spring 20, the second spring 21, and the fixed pin are fixed to the first leaf spring 20. 9, the coupling pin 22 and the pressing member 8 constitute a cassette holding means.

In the DAT configured as above, minus 2
When the temperature is low (such as 0°C), as shown in FIG. g) Leaf spring 21
), the position of the holding member 8 moves in the direction away from the cassette/socket 1-1. The deflection star of decreases, and the cassette 1
The pressing force against is reduced.

Therefore, even if the pushing energy of the sliding bar 3 relative to the cassette 1 decreases at low temperatures, the first and second leaf springs 20 in the cassette holder 2,
As a result, the holding force of the cassette 1 by the cassette 21 is reduced, so that the cassette 1 remains at the cassette insertion position of the cassette holder 2 when the cassette 1 is ejected.

On the other hand, when the temperature is as high as 60° C., the position of the holding member 8 changes due to the difference in thermal expansion coefficient between the first leaf spring 20 and the second leaf spring 21, as shown in FIG. cassette], when the cassette 1 is located at the cassette insertion position in the cassette holder 2, the amount of deflection of the first and second leaf springs 20, 21 increases, and the pressing force against the cassette 1 increases accordingly. increases. Therefore, even if the pressing force of the slide lever 3 against the cassette increases at high temperatures, the
As a result, the holding force of the cassette 1 by the second leaf springs 20 and 21 increases, and as a result, when the cassette 1 is ejected,
The cassette 1 remains at the cassette insertion position within the cassette holder 2 and does not fly out.

In the above embodiment, a DAT was explained as a cassette rope ink device, but the present invention can of course be applied to a device using a cassette containing a magnetic disk or an optical disk, for example.

[Effects of the Invention] As explained above, according to the cassette loading device of the present invention, the cassette holding means is displaced away from the cassette when the temperature is low, and is displaced toward the cassette when the temperature is high. This has the effect that the cassette can be pushed out to an appropriate position within the cassette holder by the slide lever over the entire operating temperature range.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one cassette boulder of DAT showing an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG.
The figure is a sectional view showing how the cassette holding means shown in FIG. 1 is used, FIG. 4 is a sectional view showing another way of using the cassette holding means shown in FIG. Conventional DAT moving between position and cassette loading position
Fig. 6 is a cross-sectional view of the conventional cassette holder, and Fig. 7 is a cross-sectional view of the conventional cassette holder.
The plan view of the figure and FIG. 8 are cross-sectional views showing the state when the cassette is inserted into the cassette holder of FIG. In the figure, 1 is a cassette, 2 is a cassette holder,
3 is a slide lever, 4 is a frame, 8 is a holding member,
20 is a first leaf spring, and 21 is a second leaf spring. In each figure, the same reference numerals indicate the same or equivalent parts. Substitute entry Sogado Sho Seri Zukan 2 Figures Children 3 Figures Kabuto 4 Ward Children 5A Zuten 6 Figures Kabuto 7

Claims (1)

[Claims] a cassette holder provided in a frame for storing a cassette and moving between a cassette insertion position and a cassette mounting position; a cassette holding means provided in the cassette holder for holding a cassette in the cassette holder; In the cassette loading device, the cassette loading device includes a slide lever that comes into contact with the cassette when the cassette is in the cassette insertion position and urges the cassette in a direction to push the cassette out of the cassette holder, wherein the cassette holding means is made of metals having different coefficients of thermal expansion. The first leaf spring and the second leaf spring are stacked one on top of the other, and are displaced in a direction away from the cassette when the temperature is low, and are displaced toward the cassette when the temperature is high. cassette loading device.