JPH0626992Y2 - Lid opening mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a lid opening mechanism used in a digital audio tape player (hereinafter referred to as DAT).

(Prior Art) A cassette used for DAT is configured to protect the tape by covering the front surface of the tape with a lid in a normal state when the DAT is not inserted. Therefore, in DAT,
What is needed is a means for opening the cassette lid during the cassette loading operation.

As such a lid opening means, a means is usually adopted in which a fixed lid opening member is provided on the side plate and the fixed lid opening member is raised relative to the cassette by the descending operation of the cassette holder. ing.

(Problems to be Solved by the Invention) However, the lid opening means as described above has the following problems.

That is, since the vertical operation stroke required to completely open the lid is larger than the thickness of the cassette, the operation stroke of the cassette holder in the vertical direction when the fixed lid opening member as described above is used. Becomes large, and the device unnecessarily increases in size.

Further, the fixed lid opening member is usually provided only on one side plate, but the cassette has springs for closing the lid evenly on both sides.
When the pressing force of the lid opening member is applied to only one side of the lid, a bending moment is generated in the lid. in this case,
The DAT cassette body is smaller than a normal analog cassette and is thinly made of synthetic resin, so that it is vulnerable to external force and heat and is likely to be deformed.

The present invention has been proposed in order to solve the above problems, and an object thereof is to provide an excellent lid opening mechanism that can reduce the size of the device and that does not deform the lid. It is to be.

[Structure of the Invention] (Means for Solving the Problems) In the lid opening mechanism according to the present invention, a lid opening member for opening the lid of the cassette is rotatably provided on both sides of the cassette holder. When the cassette holder descends, it is rotated upward, the lid opening member on one side is rotated by the urging force of the spring, and when the cassette holder is in the insertion position, the opening member is opened by the regulating member. The feature of the configuration is that the regulation is performed in the direction opposite to the side.

(Operation) In the present invention having the above-described structure, first, since the lid can be opened by rotating the lid opening member upward when the cassette holder descends, the operation stroke in the vertical direction of the cassette holder is increased. No need. As a result, it is possible to contribute to downsizing of the device.

Further, since the lid opening member is provided on both sides of the cassette holder, the force applied to the lid when the lid is opened is equalized, and a bending moment is not generated in the lid. Therefore, the deformation of the lid is surely prevented.

Further, when the lid opening members on both sides are rotated by a motor drive or the like, it is difficult to cause the left and right members to perform an even operation due to an accuracy error in processing a part or an accuracy error in mounting configuration. In the present invention, since the lid opening member on one side is rotated by the urging force of the spring, the error of the left and right lid opening members can be absorbed by this spring, and the lid opening operation can be performed evenly on the left and right sides. .

(Embodiment) An embodiment of the lid opening mechanism according to the present invention as described above will be specifically described with reference to the drawings.

* Structure of Embodiment * Left-side structure FIGS. 1 and 2 are side views showing the left-side structure of the lid opening mechanism in the present embodiment.

In FIGS. 1 and 2, the upper front end of the cassette holder 2 holding the cassette 1 and the front end of the guide arm 3 are rotatably attached via a shaft 4. The guide arm 3 is attached rotatably up and down to a fixed side plate via a shaft 5 at the rear part thereof, and the cassette holder 2 is driven up and down with this vertical movement. A lid opening member 6 is provided at the rear of the cassette holder 2.
Is attached to the fixed side plate via the shaft 7 so as to be vertically rotatable.

The lid opening member 6 has a lid opening portion 6 a that engages with the lid 8 of the cassette 1 to open it, and a regulated portion 6 b that is regulated by the guide arm 3.
Is in the upper insertion position as shown in FIG. 1, the guide arm 3 is regulated downward by the regulation portion 3a at the rear end of the guide arm 3,
As the guide arm 3 descends, the restriction portion 3a is lifted, and the restriction is released, and the biasing force of the torsion spring 9 causes the lid 8 to rotate in the opening direction to open the lid 8.

Right Side Configuration FIGS. 3 to 6 are side views showing the right side configuration of the lid opening mechanism according to the present embodiment from the inside. It should be noted that the same members as those of the above-mentioned configuration on the left side are denoted by the same reference numerals and the description thereof will be omitted.

First, as shown in FIGS. 3 and 4, a cam plate 10 is provided on the right side to move forward and backward by a driving force of a motor to cam-drive the guide arm 3. In the guide arm 3, a guide pin 4a provided on an extension of the shaft 4 with the cassette holder 2 is inserted into a first cam groove 11 provided at a front portion of the cam plate 10, and is shown in FIG. As described above, when the cam plate 10 is in the rear position, it takes the upper insertion position, and as shown in FIG. 4, when the cam plate 10 is in the front position, it takes the lower operation position.

The second cam groove 12 is provided at the rear of the cam plate 10.
Is provided, and the cam pin 6c provided at one end of the lid opening member 6 is inserted therein. Here, the shaft 7 of the lid opening member 6 is provided in the central portion of the member, and the lid opening portion 6a is provided at the end portion on the opposite side of the cam pin 6c sandwiching the shaft 7. As shown in FIG. 3, when the cam plate 10 is at the rear position, the cam pin 6c is at the upper position, so that the lid opening portion 6a is at the lower position as shown in FIG. As the cam pin 6c is driven downward, the lid opening portion 6a rises to open the lid 8 as shown in FIG.

* Operation of the Embodiment * The operation of the present embodiment having the above configuration is as follows.

First, as shown in FIG. 3, the cassette 1 is inserted with the cam plate 10 in the rear position and the guide arm 3 in the upper insertion position. When the insertion of the cassette 1 is detected, the cam plate 10 starts moving forward by the motor. As a result, the guide arm 3 starts descending via the guide pin 4a inserted in the first cam groove 11.

Then, on the left side, the lid opening member 6 is released from the regulation as the regulating portion 3a is moved upward by the downward movement of the guide arm 3, and the lid spring 6 is rotated in the releasing direction from the state shown in FIG. To do. As a result, the lid opening portion 6a of the lid opening member 6 engages with the lid 8 of the cassette 1, and finally the lid 8 is opened as shown in FIG.

On the right side, as the cam plate 10 moves forward, the cam pin 6c of the lid opening member 6 inserted into the second cam groove 12 is driven downward, and the lid opening member 6 is
From the state shown in FIGS. 3 and 5, the shaft 7 is rotated about the shaft 7 in the clockwise direction, which is the opening direction. As a result, the lid opening portion 6a of the lid opening member 6 engages with the lid of the cassette 1, and finally the lid 8 is opened as shown in FIG.

As described above, in this embodiment, since the lid 8 can be opened by rotating the lid opening member 6 upward when the cassette holder 2 is lowered, it is possible to use the fixed lid opening member. Moreover, since it is not necessary to make a large operation stroke in the vertical direction of the cassette holder 2, it is possible to contribute to downsizing of the apparatus.

Further, since the lid opening member 6 is provided on both sides of the cassette holder 2, the force applied to the lid 8 at the time of opening the lid 8 becomes uniform, and the lid opening member 6 is bent to one side as in the case where the lid opening member is provided. Since no moment is generated, there is an advantage that the deformation of the lid 8 can be surely prevented.

By the way, if the lid opening members 6 on both sides are both rotated by driving a motor or the like, it is difficult to cause the left and right members to perform an even operation due to an accuracy error in machining a part and an accuracy error in a mounting configuration. Therefore, the lid 8 may be deformed due to an operation error. On the other hand, in this embodiment, since the left lid opening member 6 is rotated by the biasing force of the torsion spring 9, the error of the left and right lid opening members 6 is absorbed by this spring 9, and the left and right lid opening members 6 are evenly distributed. The lid opening operation can be performed, and also in this respect, the deformation of the lid 8 can be prevented.

* Other Embodiments * Note that the present invention is not limited to the above-described embodiments, and for example, a configuration in which both lid opening members are driven by the biasing force of springs is also possible. Further, in the above-mentioned embodiment, the guide arm is used as the regulating member of the lid opening member on one side, but a cassette holder may be used or a dedicated member may be separately provided.

[Effects of the Invention] As described above, according to the present invention, the lid opening member is provided on both sides of the cassette holder, and the driving force of the lid opening member on one side is obtained by the spring. It is possible to provide an excellent lid opening mechanism that can contribute to downsizing of the device and can reliably prevent deformation of the lid by performing a stable opening operation, as compared with the related art that uses the lid.

[Brief description of drawings]

1 and 2 are side views showing a left side of an embodiment of a lid opening mechanism according to the present invention. FIG. 1 is an insertion position, FIG. 2 is an operating position, and FIGS. 3 and 4 are the same. FIG. 4 is a side view showing the right side cam plate, guide arm and lid opening member of the embodiment from the inside, FIG. 3 is an insertion position, FIG. 4 is an operating position, and FIGS. 5 and 6 are the right side of the embodiment. It is a side view showing the lid opening member and the cassette holder from inside,
FIG. 5 shows the insertion position, and FIG. 6 shows the operating position. DESCRIPTION OF SYMBOLS 1 ... Cassette, 2 ... Cassette holder, 3 ... Guide arm, 3a ... Regulation part, 4, 5, 7 ... Shaft, 4a ... Guide pin, 6 ... Lid opening member, 6a ... Lid opening part, 6b ...
Regulated part, 6c ... Cam pin, 8 ... Lid, 9 ... Torsion spring, 10 ... Cam plate, 11 ... First cam groove, 12 ... Second cam groove.

Claims (2)

[Scope of utility model registration request] 1. A. A cassette holder that holds the cassette and moves up and down between the insertion position and the operating position. b. A lid opening member that is rotatably provided on both sides of the cassette holder and rotates upward when the cassette holder descends to open the lid of the cassette held in the cassette holder. c. A spring that biases the lid opening member on one side in the opening direction. d. A regulation member that regulates the lid opening member on the side that uses the spring as a driving force in the direction opposite to the opening side when the cassette holder is in the insertion position. A lid opening mechanism having the above-mentioned requirements a to d. 2. The lid opening mechanism according to claim 1, wherein the cassette holder is driven by a cam mechanism connected to a motor, and the lid opening member on one side is driven by the same cam mechanism.