JPH059860B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic recording and reproducing apparatus such as a tape recorder or a video tape recorder.

1 to 3 show a conventional magnetic recording and reproducing apparatus. In the figures, 1 is a main body, 2 is a cassette holder supported by a link 4, and 3 is this cassette holder. This is the upper cover of No.2. The link 4 has one end supported by a rotation shaft 4a of an angle 9 fixed to the chassis 8, and performs rotation movement. The cassette holder 2 is supported by a rotation shaft 4c provided at the other end 4b of the link 4. Therefore, after the cassette 6 is inserted into the cassette holder 2 in the state shown in FIG. 3, the cassette 6 rotates about the pivot shaft 4a until it is mounted in the state shown in FIG. In the figure, 5 is the operation button, 7 is the cylinder, and 10 is the operation button.
1 is a capstan, and 11 is a cassette positioning post.

By the way, recent magnetic recording and playback devices, especially VTRs,
As devices become smaller and lighter, there is a need for compact designs, and development efforts are focused on making them thinner. In the above situation, the link 4 performs a rotational movement, but it takes up a considerable space in the height direction, and there is a considerable distance from the rotation axis 4a at one end of the link 4 to the other end, so that it cannot support the weight of the cassette 6. Therefore, it needs to be strong in terms of strength, and there is also a rotating shaft 4c necessary for left and right synchronization, which is a considerable burden in terms of weight and construction. Furthermore, due to the relationship between the locus of the rotational movement of the magnetic tape stored in the cassette 6 and the contact with the running posts of the capstan 10, etc., the height of the rotation shaft 4a must be approximately at the same height as the tape center. However, this was a major obstacle in terms of configuration when considering miniaturization of the device. Furthermore, since the radius of the rotational movement is large, the longitudinal position of the cassette 6 tends to fluctuate considerably, making it difficult to adjust the longitudinal position of the cassette 6.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to make the device smaller and lighter.

SUMMARY OF THE INVENTION In order to achieve the above object, the magnetic recording/reproducing apparatus of the present invention includes a cassette holder for inserting a cassette, a cassette holder which covers the cassette holder, and which extends in the front-rear direction in the vicinity of the front end of both sides of the cassette holder. The cassette holder is provided with a long hole portion provided on the surface into which the first pin is inserted, and a rotating board having a rotation center hole near the rear end of both side surfaces, A guide plate having a guide groove into which the pin No. 2 is fitted, and a shaft portion that fits into the rotation center hole of the rotation base plate, and the guide groove becomes closer to the rotation center hole of the rotation base plate as the cassette holder approaches the chassis. A printed circuit board is provided at a position facing away from the cassette holder and further inside the rotating board at a position facing the cassette holder.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below based on the drawings (FIGS. 4 to 8). 21 in the figure
Reference numeral 22 denotes a main body of the apparatus, and 22 a cassette holder for inserting a cassette. First pins 22a and 22b are fixed in parallel to each other at the upper ends of both sides of the holder. Reference numeral 24 denotes a rotary base plate located above the cassette holder 22, and long holes 24a and 24b are formed on both sides of the base plate near the front end in the front-rear direction. The cassette holder 22 is assembled into the rotating board 24 by inserting the pins 22a, 22b through the openings of the long tag parts 24a, 24b. The rotary base plate 24 has a rotary center hole 24c near the rear end, and when this is engaged with the shaft portion 26a of the angle 26 on the chassis 32, the cassette holder 22 coupled to the rotary base plate 24 The second pin 22c fixed to the lower ends of both sides is assembled into the guide groove 30a formed in the guide plate 30 on the chassis 32. The guide groove 30a is configured such that as the cassette holder 22 approaches the chassis 32, it faces away from the rotation center hole 24c of the rotation base plate 24. After installation, the stopper 2 can rotate around the support shaft 29a.
By rotating the right stopper 29 counterclockwise and the left side stopper 29 clockwise, they can act as a stopper for the pin 22c when the cassette holder 22 is fully raised. 23 in the figure
25 is an operation button, 25 is a damper gear, 27 is a cassette damper, 28 is a spring, 31 is a rotating head cylinder, 33 is a reel stand, 34 is a cassette, 35a to 35d are printed circuit boards, 36 is a flexible printed circuit board, and 37 is a power supply section. , 36 are cassette covers attached to the upper part of the rotating board 24.

Next, the operation will be explained using FIGS. 7 and 8.
Rotating board 2 with cassette cover 38 attached
4 rotates around a shaft portion 26a that fits into the rotation center hole 24c. The cassette holder 22 also moves in a similar manner, but its forward and backward position is regulated by the guide plate 30. Therefore, when the cassette is installed in the state shown in FIG.
b will be relatively moved in the direction away from the shaft portion 26a. However, the relative movement range is the elongated hole 24.
Since the pins 22a and 22b do not extend to the openings of the long holes 24a and 24b, once the cassette holder 22 is assembled into the guide plate 30, the pins 22a and 22b do not reach the openings of the long holes 24a and 24b.
It will never fall outside of 4b. Incidentally, in FIGS. 7 and 8, the printed circuit boards 35a to 35d are connected by a flexible printed circuit board 36. As shown in FIG. Therefore, by adopting the configuration of the present invention, it becomes possible to arrange a printed circuit board on the so-called top plate portion of the device, and it becomes possible to significantly reduce the size and compactness of the device. Furthermore, the link 4 and rotation shaft 4c described in the conventional example are not required, and space can be used quite effectively. Since the longitudinal position of the cassette is determined by the guide groove 30a of the guide plate 30, there is little variation and there is no need to adjust the longitudinal position of the cassette. Furthermore, in the past, it was necessary to set the height of the rotation axis to approximately the tape center height due to the problem of axis marks, but in this device, the locus is determined by the shape of the guide groove 30a of the guide plate 30. The rotation axis height can be set arbitrarily.

FIG. 9 is a diagram showing the rotational movement when the height of the rotational axis of the rotational board 24 is set to the height of the tape center T in the configuration of the present invention. Furthermore, the power supply section 37 is attached to the rear side of the device, making it suitable for modern small portable devices.
The above power supply configuration is often used in VTRs. As shown in FIG. 9, when the height of the rotation axis is set to the height of the tape center T, when the cassette holder 22 is fully raised, the influence on the rear part of the device, that is, the power supply section 37, is is larger than that of the embodiment of the present invention described in FIGS. 7 and 8. In other words, the configuration of the power supply section becomes difficult. Therefore, by setting the height of the rotating shaft in the embodiment of the present invention above the tape center, there is no influence on the configuration of the power supply section compared to the conventional art.

Effects of the Invention As described above, according to the present invention, when the cassette holder is mounted, the longitudinal position of the cassette holder is precisely regulated by the guide groove. Furthermore, the printed circuit board can be placed inside the rotating board, thereby making it possible to downsize the device. Further, by configuring the link shown in the conventional example using a rotating board, a dedicated structure for the link is not required, and the entire device can be made smaller and lighter.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing a conventional example, FIGS. 2 and 3 are side sectional views similarly showing the conventional example, and FIGS. 4 to 8 show an embodiment of the present invention. is an external perspective view, FIG. 5 is an exploded perspective view, FIG. 6 is a front sectional view, FIGS. 7 and 8 are side sectional views, and FIG. FIG. 3 is a schematic side view of the device set at the center height. 21...Device main body, 22...Cassette holder, 2
2a, 22b, 22c...pin, 24...rotating board,
24a, 24b...long hole portion, 24c...rotation center hole,
26... Angle, 26a... Shaft portion, 30... Guide plate, 30a... Guide groove, 31... Rotating head cylinder, 32... Chassis, 34... Cassette, 3
8...Cassette cover.

Claims (1)

[Claims] 1 A cassette holder for inserting a cassette, a long hole on both sides into which a first pin is inserted, facing in the front-rear direction and provided on both sides of the cassette holder, covering the cassette holder and near the front end of both sides. A rotating base plate having a rotation center hole in the vicinity of the rear end, a guide plate having a guide groove on the chassis into which second pins provided on both sides of the cassette holder are fitted, and a rotating base plate having a rotation center hole in the vicinity of the rear end. A shaft portion that fits into the rotation center hole is provided, and the guide groove is oriented in a direction that moves away from the rotation center hole of the rotation base plate as the cassette holder approaches the chassis, and the cassette holder is fitted inside the rotation base plate. A magnetic recording/reproducing device with a printed circuit board facing the