JPH064998U - Magnetic recording / reproducing device - Google Patents

Abstract

(57) [Abstract] [Purpose] Utilizing the tuner as a noise shielding means, without degrading the quality of audio equipment,
Moreover, a magnetic recording / reproducing apparatus is provided which can reasonably achieve a reduction in the depth of the apparatus housing. [Structure] In a magnetic recording / reproducing apparatus equipped with a shielding means for shielding a noise generation source from a recording and / or reproducing unit, the apparatus housing 1 is constructed with a minimum depth necessary for housing a deck body 3. In addition, the switch circuit is incorporated in the printed wiring board 2 and is located between the noise generating source such as the pulse transformer 4 including the switch circuit portion and the deck body 3, and the partition is provided in the apparatus housing 1. It is characterized in that a tuner 5 having a V-shape is provided and is replaced with the shielding means.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetic recording / reproducing device, and more particularly to a magnetic recording / reproducing device having a tuner.

[0002]

[Prior art]

 Conventionally, in the magnetic recording / reproducing apparatus 101, as shown in FIG. 2, recording and / or reproducing of the deck main body is performed from a noise generating source such as a switching power supply circuit (not shown) or a pulse transformer 104 provided in the apparatus housing. Since high-frequency noise may enter the audio section and be superimposed on the audio signal, the noise source should be kept as far as possible from the recording and / or reproducing section and the box-shaped shield case 108, etc. A shielding means is used to prevent spatial leakage of noise. In the figure, 102 is a printed wiring board, 103 is a deck main body, 105 is a tuner, 106 is an input / output jack, and 107 is an opening with a lid.

[0003]

[Problems to be solved by the device]

 Therefore, since the installation of the shield case occupies a considerable space, a tuner, a jack and the like are arranged in a narrow space inside the device housing located at the back of the deck body. However, downsizing of the equipment is the most important issue in the recent trend.

The present invention has been made based on the above circumstances, and due to the great progress of the integration technology, it is possible to perform compact and planar switching on a printed wiring board arranged at the bottom of the device housing. Focusing on the situation in which a power supply circuit can be incorporated, the tuner is used as a noise shielding means to prevent the deterioration of quality and to achieve a reasonable reduction in the depth of the device housing. It aims to provide a playback device.

[0005]

[Methods for solving problems]

 For this reason, in the present invention, the deck main body in which the recording and / or reproducing unit is incorporated in the chassis is arranged on one side of the device housing equipped with the printed wiring board on the bottom and the inside of the device housing is A magnetic recording device having a noise source such as a switching power supply circuit and a pulse transformer disposed on the other side of the printed wiring board located on the other side and shielding means for shielding these from the recording and / or reproducing unit. In the playback device, the minimum depth required to house the deck body constitutes the device housing, and the switching power supply circuit is built into the printed wiring board, and the pulse including the switching power supply circuit part is included. -A partition type tuner is installed in the above device housing between the noise source such as a transformer and the above deck main body. And instead of the 蔽 means.

[0006]

[Action]

 Therefore, since the tuner reflects high-frequency noise from the noise source such as the switching power supply circuit and the pulse transformer and blocks the noise to the recording and / or reproducing section on the deck body side, a shield case is used. In some cases, spatial constraints are lifted. Moreover, since the position of the tuner is located between the noise source and the deck main body, the depth of the device housing can be shortened as much as possible.

[0007]

【Example】

 An embodiment of the present invention will be specifically described below with reference to the drawings. In the figure, reference numeral 1 is a device housing of the magnetic recording / reproducing device. A printed wiring board 2 is mounted on the bottom of the device housing 1 through a predetermined space in a state of being developed in a plane. A deck main body 3 in which a recording and / or reproducing unit (not shown) is incorporated in a chassis is arranged on one side (left side in the embodiment) of the apparatus housing 1. Further, a switching power supply circuit is incorporated in the printed wiring board 2 located on the other side (the right side in the embodiment) in the device housing 1, and the printed wiring board 2 is provided on the printed wiring board 2. Is provided with a noise source such as a pulse transformer 4. Further, in the present invention, the partition type tuner 5 is employed as a shielding means for shielding the noise source including the switching power supply circuit portion from the recording and / or reproducing section.

As is clear from the figure, the partition-type tuner 5 is located between the noise source such as the pulse transformer 4 including the switching power supply circuit portion and the deck body. It acts as a so-called high frequency barrier. For this reason, it is no longer necessary to equip the rear side of the deck body 3 with a tuner, so that in the magnetic recording / reproducing apparatus, the apparatus housing 1 can be mounted with the minimum depth required to accommodate the deck body. It can be configured, and the installation of a shield cover or the like for shielding the noise source can be omitted.

In this embodiment, a pair of jacks 6 are provided in the device casing 1 at the rear edge of the printed wiring board 2. Further, the deck main body 3 employed in this embodiment is of a front loading type, so that the front panel 1A of the apparatus housing 1 is provided with a tape cassette loading / unloading unit. An opening 7 with a lid is provided.

[0010]

[Effect of device]

 As described in detail above, the present invention provides a deck main body having a recording and / or reproducing unit incorporated in a chassis on one side of a device housing having a printed wiring board at the bottom thereof, and the above device. A noise source such as a switching power supply circuit and a pulse transformer is provided on the printed wiring board located on the other side of the housing, and a shielding means for shielding these from the recording and / or reproducing unit is provided. In the magnetic recording / reproducing device that is used, the device casing is configured with the minimum depth required to accommodate the deck main body, and the switching power supply circuit is incorporated into the printed wiring board. Located between the noise source such as the pulse transformer including the parts and the deck body, a partition type tuner is installed in the device housing. Since the shielding means is replaced by the shielding means, the tuner serves as a high-frequency barrier and reflects high-frequency noise from noise sources such as the switching power supply circuit and the pulse transformer, and the recording and / or reproducing unit on the deck body side. Since it blocks noise to the device, the spatial restrictions are released compared to the case where a shield case is used.Since the position of the tuner is located between the noise source and the deck body, The depth of the body has the practical effect of being as short as possible.

[Brief description of drawings]

FIG. 1 is a perspective view of an arrangement of components according to an embodiment of the present invention.

FIG. 2 is a perspective view of an arrangement of each component of a conventional magnetic recording / reproducing apparatus.

[Explanation of symbols]

 1 Equipment housing 1A Front panel 2 Printed wiring board 3 Deck body 4 Pulse transformer 5 Tuner 6 Jack 7 Opening with lid

Claims (1)

[Scope of utility model registration request] 1. A deck main body having a recording and / or reproducing unit incorporated in a chassis is arranged on one side of an apparatus casing having a printed wiring board at the bottom and is positioned on the other side of the apparatus casing. In the magnetic recording / reproducing apparatus, a switching power supply circuit, a noise source such as a pulse transformer is provided on the printed wiring board, and shielding means for shielding these from the recording and / or reproducing unit is used. A power supply circuit is built into the printed wiring board, and a partition-type tuner is placed in the device housing, located between the noise source such as a pulse transformer including the switching power supply circuit and the deck body. A magnetic recording / reproducing apparatus characterized in that the magnetic recording / reproducing apparatus is provided instead of the shielding means.