JPS6245312Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cassette mounting mechanism for a tape recorder.

Generally, the cassette loading mechanism of a tape recorder requires a structure that pushes the cassette downward and toward the insertion slot within the cassette pocket. The conventional tape recorder cassette mounting mechanism 10, as shown in FIG.
cassette holder spring 18.
The first cassette holder spring 14 is in contact with the upper surface of the cassette 20 in the cassette pocket 12, and the cassette is biased against the lower wall 15 of the cassette pocket. Furthermore, the second cassette holder spring 18 abuts against the rear end surface 21, so that the cassette 20 is biased toward the insertion port. In this known configuration, the first cassette holder spring 14 is disposed on the upper wall of the cassette pocket 12 and presses against the upper surface of the cassette 20, which prevents the cassette mounting mechanism 10 from becoming thinner. In addition, the first cassette holder spring 14
It is difficult to install the cassette mounting mechanism 10, which prevents the assembly of the cassette mounting mechanism 10 from being simplified. Furthermore, the cassette 20 is inserted into the cassette pocket 12 until it abuts the second cassette holder spring 18, which acts as a cassette stop. and second cassette holder spring 1
The cassette 20, together with the cassette pocket 12 and the cassette lid 22, is rotated counterclockwise around the pivot pin 24 against the biasing force of the cassette 8, and is set at the mounting position. As a result, the cassette guide shaft 24 and the guide hole 26 of the cassette are not aligned accurately.
The positional accuracy of the second cassette holder spring 18 has a large influence.

The object of this invention is to provide a tape recorder cassette device mechanism that is thin and allows the cassette guide shaft and cassette hole to be accurately aligned.

An embodiment of this invention will be described in detail below with reference to the drawings.

Figures 2 and 3 show the cassette mounting mechanism 3 according to this invention with the cassette inserted into the cassette pocket and set at the cassette mounting position.
0 is shown, respectively. Components of the cassette mounting mechanism 30 are designated by reference numerals with 20 added to the corresponding components of the cassette mounting mechanism 10 shown in FIG. In this cassette mounting mechanism 30, the cassette pocket 3
A cassette stopper 33 is provided at the rear end of the lower wall 35 of 2.
is formed. The cassette holder spring 38 is provided with a bending piece 39 at its upper end so as to be rotatable around the pivot pin 43, and the bending piece is formed so as to be able to come into contact with the upper edge of the rear end surface 41 of the cassette 40. There is. A pressing piece 47 that can press the lower end 45 of the cassette holder spring 38 extends from the lower wall 35 of the cassette pocket 32.

When the cassette 40 is inserted into the cassette pocket 32 as shown in FIG. 2, the cassette abuts the cassette stop 33 and remains in its inserted position.
The cassette holder spring 38 is biased clockwise by a torsion spring (not shown) with a small spring constant wound around the pivot pin 43 and comes into contact with the stopper 49, thereby holding the cassette 4 at the insertion position.
0 and is located at a non-contact position. Naturally, when the cassette 40 is in the insertion position, the cassette guide shaft 44 on the base plate 36 is not fitted into the cassette hole 46. By pressing the cassette lid 42 and rotating the cassette lid counterclockwise around the pivot pin 44, the cassette guide shaft 44 is fitted into the cassette hole 46 of the cassette 40. Cassette pocket 32
is fixed to the cassette lid 42, so if the cassette lid 42 is further rotated counterclockwise, the cassette guide shaft 44 will fit into the cassette hole 46, and the cassette stopper 33 of the cassette pocket will move.
is separated from the rear end surface 41 of the cassette, and the pressing piece 47
approaches the lower end 45 of the cassette holder spring 38. When the cassette lid 42 further rotates counterclockwise, the pressing piece 47 contacts and presses the lower end 45 of the cassette holder spring 38, causing the cassette holder spring 38 to rotate counterclockwise around the pivot pin 43. The bent piece 39 then comes into contact with the upper edge of the rear end surface 41 of the cassette. When the bent piece 39 comes into contact with the upper edge of the rear end surface 41 of the cassette, the cassette 40 is held by the cassette holder spring 38.
As shown in FIG. 3, a force F is applied in the direction of the arrow. The horizontal and vertical components of this force F push the cassette toward the insertion slot and downward.

As described above, according to this invention, the cassette holder spring is rotatably provided with a bent piece at the upper end that can come into contact with the upper edge of the rear end surface of the cassette. A cassette stopper is formed in the cassette pocket to prevent the cassette and the cassette holder spring from coming into contact with each other before the cassette guide shaft is fitted into the cassette hole when the rear end surface of the cassette comes into contact with the cassette stopper. Also, after the cassette guide shaft is fitted into the cassette hole, it comes into contact with the lower end of the cassette holder spring and rotates the cassette holder spring, thereby pressing the bent piece of the cassette holder spring into contact with the upper edge of the rear end surface of the cassette. A piece is further formed into the cassette pocket.

Therefore, since the insertion position of the cassette is determined by the cassette stopper of the cassette pocket, the positional relationship between the cassette hole and the cassette guide shaft can be determined accurately. Further, after the cassette guide shaft is fitted into the cassette hole and the position of the cassette is secured, the cassette holder spring comes into contact with the cassette and is pressed against the cassette, so that the influence of the cassette holder spring on position accuracy is reduced. Furthermore, since only one cassette holder spring is disposed behind the cassette pocket, and no cassette holder spring for pressing the top surface of the cassette is provided on the top wall of the cassette pocket, assembly of the cassette mounting mechanism is simplified. In addition, it is made thinner and the number of parts is reduced. In addition, by appropriately setting the contact position between the lower end of the cassette holder spring and the pressing piece of the cassette pocket, the pressing force and stroke of the cassette holder spring acting on the cassette can be freely selected.

[Brief explanation of the drawing]

FIG. 1 is a right side view of a known cassette mounting mechanism of a tape recorder, and FIGS. 2 and 3 are right side views of the cassette mounting mechanism of a tape recorder according to the present invention in a cassette inserted state and a cassette mounted state, respectively. It is. 30...Tape recorder cassette mounting mechanism,
32...Cassette pocket, 33...Cassette stopper, 38...Cassette holder spring, 39...
...Bending piece, 41...Cassette rear end surface, 44...Cassette guide shaft, 45...Lower end of cassette holder spring, 46...Cassette hole, 47...Pushing piece.

Claims (1)

[Claims for Utility Model Registration] A rotatable cassette holder spring having a bent piece at the upper end that can come into contact with the upper edge of the rear end surface of the cassette; A cassette stopper prevents contact between the cassette and the cassette holder spring before the cassette guide shaft is fitted, and a cassette stopper prevents the cassette holder spring from coming into contact with the cassette holder spring after the cassette guide shaft is fitted into the cassette hole. A cassette mounting mechanism for a tape recorder, comprising: a cassette pocket having a pressing piece that brings a bent piece of a cassette holder spring into contact with the upper edge of the rear end surface of the cassette when rotated;