JPS63197055A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent the drop-out due to dust by providing a main body with an open arm and a presser arm and holding an edge side of a shutter on the open direction side in parallel in its inclination to a guide groove by the presser arm. CONSTITUTION:When a cassette 5 is pushed in, due to its pushing force the shutter 6 is pushed in toward the open direction by a boss 3c of the open arm 3. At that time, a spring 8 in the cassette 5 is compressed, and by its resiliency, the edge part of the shutter 6 on the open direction side is to be pushed up, but by a boss 3d protrusively provided on a tip part of the presser arm 3A energized by the spring toward the center of the cassette 5, the edge part of the cassette 5 on the open direction side is pressed down in the direction of the center of the cassette 5 to be held in parallel with the groove 10. Consequently, a projection 11a of a claw 11 is moved horizontally, being apart from the upper surface of the groove 10 of the cassette 5, so that the projection 11a can never scrape the inner surface of the groove 10. In this way, the occurrence of dust causing the dropout is thus prevented.

Description

[Detailed Description of the Invention] [Purpose of the Invention (Industrial Application Field) The present invention relates to a recording/reproducing device in which a cassette containing a disc used for recording/reproducing various analog/digital signals, etc. is installed and recorded/reproduced. The present invention relates to a recording and reproducing apparatus, and more particularly to a recording and reproducing apparatus having a mechanism for opening a shutter of a cassette when a cassette is inserted into the recording and reproducing apparatus.

(Prior Art) Conventionally, as shown in FIGS. 5 to 8, for example, a cassette 5 is inserted into a main body 2 equipped with a recording and reproducing mechanism of a recording and reproducing apparatus 1, and various analog and digital signals are recorded and reproduced. A recording/reproducing apparatus 1 that performs the following is widely used.

The main body 2 is provided with an opening arm 3 that pushes the shutter 6 of the cassette 5 in the opening direction. The open arm 3
One end 3a is pivotally attached to the main body 2, and the other end 3b has a boss 3c projecting therefrom, and one end is biased in the closing direction of the shutter 6 by a spring 4 secured to the main body 2. ing.

As shown in FIGS. 5 and 6, a head insertion window 7 is formed in the cassette 5, and as shown in FIG. A spring 8 that biases the shutter 6 in the closing direction and a recording medium 9 that records information are built in. A guide groove 10 is formed in parallel to the edge of the cassette 5, and engagement step portions 5a and 5b with which the boss 3c engages are formed.

An open window 6a is formed in the shutter 6, and a claw 11 cut out on the edge side of the shutter 6 is further formed as shown in FIG.

When the cassette 5 is inserted into the main body 2 of the recording/reproducing device W1, the boss 3c of the opening arm 3 of the main body 2 engages with the rear end side of the cassette 5 in the opening direction at the engagement step 5a of the cassette 5. be done. Then, when the cassette 5 is pushed in, the force of pushing the cassette 5 causes the boss 3C to
When the shutter 6 is set in the opening direction, the head insertion window 7 is opened as shown in FIG. At this time, boss 3C
is fitted into the engaging stepped portion 5b of the cassette 5, and holds the shutter 6 in an open state.

(Problems to be Solved by the Invention) However, when the boss 3C of the opening arm 3 pushes the shutter 6 of the cassette 5 in the opening direction to open the head insertion window 7 as described above, the shutter 6 of the cassette 5 is assembled inside the cassette 5. Due to the repulsive force of the spring 8 that biases the shutter 6 in the closing direction, the end of the cassette 5 in the closing direction is pushed up as shown in FIG. 7 (in the direction of the arrow). As a result of this pushing-up operation, as shown in FIG. 8, the protrusion 11a that is formed on the back side of the claw 11 of the shutter 6 when it is cut and raised scrapes the inside of the guide groove 10 of the cassette 5 and generates dust, and this dust is recorded. It adheres to the recording surface of the medium 9 and causes dropouts.

As described above, when the release arm 3 opens the shutter 6, the protrusion 11a of the shutter 6 scrapes the inside of the guide groove 10 and generates dust, and this dust adheres to the recording surface of the recording medium 9 and drops out. There was a problem that it caused

The present invention has been made to solve the above-mentioned conventional drawbacks, and aims to provide a recording/reproducing apparatus equipped with a mechanism capable of preventing the generation of dust that causes dropouts.

[Structure of the Invention] (Means for Solving the Problems) The present recording and reproducing device was invented in view of the above, and one end is rotatably pivoted to the main body of the recording and reproducing device, and the other end is rotatably pivoted to the main body of the recording and reproducing device. an opening arm that is locked to the rear end side of the shutter of the cassette in the opening direction when the cassette is inserted and pushes the shutter in the opening direction by the force of pushing the cassette; The other end is characterized in that the opening arm includes a presser arm that maintains the inclination of the front end side of the shutter in the opening direction parallel to the guide groove by the force of the opening arm pushing the shutter in the opening direction.

(Function) The recording/reproducing apparatus of the present invention is provided with an opening arm that pushes the shutter in the opening direction by the force with which the cassette is pushed in, and this opening arm opens the shutter. At this time, due to the repulsive force of the spring incorporated in the cassette, the tip of the shutter in the opening direction was tilted, and due to this tilt, the protrusion of the shutter pawl came into contact with the inner surface of the guide groove. The tilt can be maintained parallel to the guide groove, and the shutter can be moved horizontally.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 4. Note that in the figures described below, the same reference numerals are used for parts common to FIGS. 5 to 8, and overlapping explanations are omitted.

In FIG. 1, reference numeral 1 indicates a recording/reproducing apparatus, and its main body 2 is provided with an opening arm 3 for pushing a shutter 6 of a cassette 5 in the opening direction. One end 3a of the open arm 3 is rotatably pivotally attached to the main body 2, and a boss 3C is provided protruding from the other end 3b. Further, the other end portion 3b is biased in the closing direction of the shutter 6 by a spring 4 whose one end is latched to the main body 2.

Reference numeral 3A denotes a presser arm, one end of which is rotatably mounted to the main body 2, and a boss 3d protruding from the other end. In addition, the other end is a spring 4A whose one end is locked to the main body 2.
The shutter 6 is biased in the closing direction.

5 is a cassette, as shown in FIGS. 1 and 2,
A head insertion window 7 is formed, as shown in FIG.
A spring 8 whose one end is held inside the cassette 5 and the other end of which biases the shutter 6 in the closing direction and a recording medium 9 are built into the cassette 5. A guide arm 10 is formed at the edge of the cassette 5 in parallel with the edge.

Reference numeral 6 designates the aforementioned shutter, and as shown in FIG. 1, an open window 6a is formed therein, and as shown in FIG. 4, a claw 11 is formed by cutting and raising the edge of the window 6a. lla is a protrusion that is produced when the nail 11 is cut and raised.

Next, the operation of this embodiment will be explained.

When the cassette 5 is inserted into the main body 2, the boss 3c protruding from the end 3b of the arm 3 fits into the engaging stepped portion 5a of the cassette 5, and comes into contact with the rear end side of the shutter 6 in the opening direction. On the other hand, the boss 3d of the arm 3A of the main body 2 engages with the distal end side of the shutter 6 in the opening direction. When the cassette 5 is pushed in, the pushing force causes the boss 3C of the open arm 3 to
pushes the shutter 6 in the opening direction. At this time, cassette 5
The spring 8 built into the cassette 5 is compressed, and its repulsive force tries to push up the tip of the shutter 6 in the opening direction, but at this time, as shown in FIG. As shown in FIG. 3, the tip of the cassette 5 in the opening direction is pressed toward the center of the cassette 5 by the boss 3d protruding from the end of the biased presser arm 3A. It is held parallel to the groove 10.

In this way, since the boss 3d keeps the inclination of the shutter 6 parallel to the groove 10, the protrusion 11a of the claw 11 moves horizontally away from the upper surface of the groove 10 of the cassette 5, as shown in FIG. , the protrusion 11a will not scrape the inner surface of the armature 10. Although this embodiment shows an example in which a boss 3d is provided protruding from the presser arm 3A, the present invention is not limited to this example, and any locking means can be used.

[Effects of the Invention] As explained above, since the recording/reproducing device of the present invention includes an open arm and a presser arm in the main body,
The presser arm can maintain the inclination of the front end side of the shutter in the opening direction parallel to the guide groove, and the shutter can be moved horizontally when the shutter is opened and closed. Furthermore, the protrusions cut and raised on the edges of the shutter claws no longer rub the dirt of the cassette too hard, so dropouts caused by dirt and media that occur when the protrusions scrape the inner surface of the grooves are avoided. Damage etc. can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a front view showing when the shutter is open, Fig. 3 is an enlarged front view of the main part of Fig. 1 seen from the back, and Fig. 4 is FIG. 3 is an enlarged sectional view taken along the line TV-IV in FIG. 3, FIG. 5 is a front view showing a conventional recording device, FIG. 6 is a front view showing when the shutter is open, and FIG. 7 is an open view of the shutter in FIG. 6. Figure 8 is an enlarged front view of the temporom from the back side, and Figure 8 is the same as ■-■ in Figure 7.
It is a line enlarged sectional view. 1... Recording/playback device 2... Main body 3... Open arm 3A... Presser arm 3c, 3d...・Boss 5...Cassette 6...Shutter 7...Head insertion window 9...Recording medium 10・・・・・・Mizo Applicant: Toshiba Corporation Applicant: Toshiba Electronic Device Engineering Co., Ltd. Agent Patent Attorney Sasa Suyama - Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] (1) Using a cassette that houses a disc-shaped rotatable recording medium, is movable along a guide groove formed parallel to the edge, and is equipped with a shutter that closes the head insertion slot when not in use. In a recording and reproducing device that performs recording and reproducing, one end is rotatably pivoted to the main body of the recording and reproducing device, and the other end is locked to the rear end side of the cassette in the direction in which the shutter of the cassette is opened when the cassette is inserted. an opening arm that pushes the shutter in the opening direction due to the force with which it is pushed; and an opening arm that has one end rotatably pivoted to the main body and the other end that moves the shutter in the opening direction due to the force of the opening arm that pushes the shutter in the opening direction. 1. A recording/reproducing device comprising: a presser arm that holds the tip side of the arm parallel to the guide groove.