JPS6134595Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to, for example, a slot-in type cassette deck.

Slot-in type cassette decks allow you to play the cassette at the same time you insert it, play OFF by ejecting the cassette, and eject the cassette at the same time.For this reason, when ejecting, the pinch roller and magnetic head are removed from the cassette, and the cassette is ejected. A large amount of energy was required to eject the cassette, which was a drawback of slot-in type cassette decks.
Generally, when the head chassis to which the magnetic head is attached is moved back using the eject lever, the pinch roller is also moved back at the same time, but especially when the pinch roller is moved back, the reaction force is applied to the eject lever, causing the eject to be delayed. requires a large operating force, and the eject lever also needed to be strong enough to withstand this operating force. The primary purpose of this invention is to reduce the ejecting force by having other components receive the reaction force applied to the ejecting lever when the pinch roller retreats, and also to simplify the structure of the ejecting lever. The purpose is also to Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing a cassette deck as an embodiment of the present invention, and FIG. 2 is a sectional view of the main parts of the cassette deck.

In FIGS. 1 and 2, reference numeral 1 denotes a magnetic head which is fixed to a head chassis 3 by screws 2 and 2'(2' is not shown). 4 and 4'(4' is not shown) are pins fixed to the head chassis 3, and the head chassis 3 is moved in the direction of the arrow 7 through guide holes 6 and 6'(6' is not shown) provided in the chassis 5. make it slide. 8, 8' are reel stands, 9, 9' are capstan shafts rotatably fitted and fixed to the chassis 5;
10, 10' are cassette guide shafts fixed to the chassis 5; 11, 11' are pinch rollers; 12,
12' is a pinch roller arm, 13 and 13' are pinch roller support shafts fixed to the chassis 5, and pinch roller springs 14 and 14' are used to support the pinch roller 1.
1 and 11' are urged against the capstan shafts 9 and 9'. Further, the pinch roller arms 12, 12' are provided with rollers (not shown) that come into contact with the head chassis notch sides 15, 15', respectively, and when the head chassis 3 moves in the direction of the arrow 7, the pinch rollers 11, 11' are moved, respectively. It swings in directions 17, 17' and is ejected from the cassette (not shown).

Reference numeral 18 denotes an eject lever, which is provided with elongated holes (not shown) at two locations for sliding with a guide pin, which will be described later. 19 is an eject button, 20 is a guide plate fixed to the chassis 5, and guides the movement of the eject lever 18 by guide pins 21, 21'(21' not shown) fixed to the guide plate 20. . 22 is a shaft fixed to the bent part of the eject lever 18, and a retracting roller 23 and a driven roller 2
4 are rotatably fitted and fixed to each other. Here, the retraction roller 23 comes into contact with the cam surface 26 of the head chassis 3 when the eject lever 18 is pushed in the direction of the arrow 25, and pushes up the head chassis in the direction of the arrow 7 while rotating. The stroke is set to be sufficient to remove the attached pinch roller and magnetic head from the cassette.

Further, at this time, the driven roller 24 is provided, for example, so as to be in constant contact with the guide plate 20, as shown in FIG. Here, the object of the present invention can be achieved even if the member in contact with the driven roller 24 is not only the guide plate 20 but also other parts other than the eject lever.

In this configuration, when the eject lever 18 is pushed in the direction of the arrow 25, the retraction roller 23 rotates and moves the head chassis 3 along the head chassis cam surface 26 against the biasing force of the pinch roller springs 14, 14'. The pinch rollers 11, 11' are moved backward in the direction of the arrow 7, and at the same time, the pinch rollers 11, 11' are swung in the directions of the arrows 17, 17' via the rollers provided on the pinch roller arms 12, 12'. Then, the backward roller 23 advances further and when it reaches the straight part 27 of the head chassis, the magnetic head 1 and the pinch roller 1
1 and 11' completely reach the outside of the cassette, and then the cassette is lifted and ejected by a separate mechanism. At this time, the driven roller 24, as described above,
The guide plate 20 is always in contact with the guide plate 20, and the guide plate 20 receives a reaction force P' which is equal to the force P that causes the head chassis 3 to move backward.As a result, the ejection lever 18 may fall due to the reaction force, or the head chassis may move backward due to the reaction force. There is no need to worry about running out of quantity.

As described above, according to the present invention, since the eject lever does not directly receive the reaction force of the head chassis, the force required for ejecting is reduced, and the eject lever itself does not require strength, simplifying its structure. Effects can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a cassette deck according to an embodiment of the present invention, and FIG. 2 is a sectional view of the main parts of the cassette deck. 1... Magnetic head, 3... Head chassis, 5
... Chassis, 9,9' ... Capstan shaft, 1
1, 11'... Pinch roller, 14, 14'... Pinch roller spring, 18... Eject lever, 2
0...Guide plate, 22...Shaft, 23...Retreat roller, 24...Followed roller, 26...Cam surface.

Claims (1)

[Claims for Utility Model Registration] (1) While having a head, it is supported in a retractable manner,
The head chassis is equipped with a head chassis that moves the pinch roller that is pressurized in the direction of the capstan in the opposite direction by retreating, and an eject lever that is slidably supported and operates the retreat of the head chassis, and a cam portion is attached to the head chassis. and a retraction roller that contacts the cam portion on the eject lever and causes the head chassis to move backward by sliding of the lever, and a driven roller that contacts a fixed member and causes the fixed member to receive a reaction force caused by retreating the head chassis. A cassette deck characterized by being equipped with rollers. (2) The cassette deck according to claim 1, wherein the retracting roller and the driven roller share a common axis.