JPH08263977A - Recording/reproducing device - Google Patents

Abstract

PURPOSE: To protect the strength of a main substrate by forming the shape of the main substrate arranged in the rear side of a recording/reproducing device so as to have roughly the same dimension as that of a chassis bottom plate composed of a metal plate. CONSTITUTION: A chassis 1 is formed of a bottom part 1A, the side plates 1B of a niff formed in both sides and a a back plate 1C formed in the rear side of a device. The bottom surface 1A is extended to the rear side of the back plate 1C provided with an opening part 1D formed according to the developing shape of the metal plate decided by this extended shape. The back plate 1C and the two side plates 1B are fixed being tightened by screws and the rigidity of the chassis 1 is increased. A main substrate 2 is screw-fixed on the bottom plate 1A of the chassis 1 and a recording/reproducing medium is provided with a reproducing/recording circuit for recording/reproducing a signal, a control circuit, an interface circuit and a power source circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical structure of a recording / reproducing device, and more particularly to a mechanical structure of a chassis and a main board of the recording / reproducing device.

[0002]

2. Description of the Related Art A typical example of a conventional recording / reproducing apparatus is known to have a structure as shown in Japanese Utility Model Laid-Open No. 64-35557, which is a main part of a spindle motor, a head seek motor, a head carriage and a main circuit board. Is attached to a die-cast frame made of aluminum to ensure rigidity while being lightweight, and the main board is fixed on the frame and protected from strength, and impact loads are mainly handled by the user. By adding it, the main board was prevented from cracking.

[0003]

In the prior art as described above, the main shaft motor, the head seek motor, the head carriage, and the main parts of the main circuit board are incorporated in the die-cast frame, and the mounting portion of the frame is high. Accurate machining was required, which was a factor of cost increase as well as material cost.

Therefore, the present invention is intended to solve the above-mentioned problems, and an object of the present invention is to make it possible to reduce the cost by using inexpensive parts and to have the same disadvantage as the conventional handling in the user. To prevent
It is to provide an economical and reliable recording / reproducing apparatus.

[0005]

A recording / reproducing apparatus of the present invention comprises a bottom plate, two side plates formed on both side surfaces of the bottom plate, and a rear plate formed from the bottom plate to the rear of the recording / reproducing apparatus. A chassis made of an integrated sheet metal, a recording / reproducing circuit for recording and / or reproducing a signal on / from a recording / reproducing medium, a control circuit for performing control associated with the recording / reproducing circuit, and exchanging signals with a host. It has an interface circuit and an interface connector, a power supply circuit and a power connector to which a voltage is supplied from the host side, and a specification setting switch that sets the interface specification according to the circuit specification of the host, and is fixed on the bottom plate of the chassis. The main board and both side plates and rear plate of the chassis serve as an upper lid for the recording / reproducing apparatus, and also shield electromagnetic noise from the outside. The bottom plate of the chassis has a shape extending to the rear of the recording / reproducing device with respect to the rear plate, and the opening of the rear plate is determined according to the developed shape of the sheet metal according to the extended shape of the bottom plate. The main board is formed on the bottom plate through the opening of the rear plate up to the extension shape part of the bottom plate in a shape substantially the same as the extension shape of the bottom plate.

Next, the interface connector and the power supply connector are arranged on an upper portion of an extended shape portion of the bottom plate on the main board.

Further, the specification setting switch is arranged above the extension shape portion of the bottom plate on the main board.

[0008]

According to the above-mentioned structure of the present invention, the main substrate arranged at the rear of the recording / reproducing apparatus has a shape substantially the same as that of the chassis bottom plate made of sheet metal, so that the main substrate can be protected strongly. Can be measured.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of an essential part of a recording / reproducing apparatus of the present invention, FIG. 2 is a side view of an essential part of the recording / reproducing apparatus of the present invention, and FIG. 3 is an overall perspective view of the recording / reproducing apparatus of the present invention. In FIGS. 1 and 2, reference numeral 1 denotes a chassis of a recording / reproducing apparatus, which is formed of an integral sheet metal. The shape of the chassis 1 is the bottom portion 1A.
And two side plates 1B formed on both side surfaces and a rear plate 1C formed on the rear side (downward direction in the drawing) of the apparatus. The bottom surface 1A extends to the rear of the rear plate 1C (downward in the figure), and the rear plate 1C has an opening 1D according to the developed shape of the sheet metal determined by the extended shape. Also the rear plate 1C
The two side plates 1B are fixed by tightening the screws 5 to improve the rigidity of the chassis 1. In addition, as the fixing method, there are methods such as caulking fixing and welding fixing in addition to screw fastening, and similarly, the rigidity can be improved.

Reference numeral 2 is a main board, which is a bottom plate 1A of the chassis.
A recording / reproducing circuit fixed on the screw for recording and / or reproducing a signal on a recording / reproducing medium, a control circuit for controlling it, an interface circuit for exchanging signals with the host, and a secondary circuit from the host. A power supply circuit to which a voltage is supplied as a power supply is formed on the main board 2. Then, the host side and the recording / reproducing apparatus are electrically connected via the interface connector 2A and the power supply connector 2B. Interface connector 2
A and the power supply connector 2B are arranged in the rear part of the device (downward in FIG. 1) and protrude toward the rear of the device from the opening 1D of the rear plate 1C. Reference numeral 2C denotes a specification setting switch, which can change the pin specification of the interface which is different according to the specification of the host side and the pin specification of the interface by the method of electrically connecting a plurality of terminals (4 terminals in FIG. 1).

In FIG. 2, 4 is a connector pressing member,
Fixed to chassis 1 and interface connector 2A
And the connector 2A and 2B are prevented from being displaced upward in FIG. 2 by an external force when connecting a connection connector (not shown) to the power supply connector 2B.

In FIG. 3, reference numeral 3 denotes a shield cover, which has a function of an electromagnetic shield against an upper lid of the apparatus and electromagnetic noise, and is fitted and fixed by a side plate 1B and a rear plate 1C of the chassis.

In the recording / reproducing apparatus having the above structure, the interface connector 2 located at the rear of the apparatus.
The shape of the main board 2 at the portion including A, the power supply connector 2B, and the specification setting switch 2C is substantially the same as the extension shape of the chassis bottom plate 1A (dotted line shape in FIG. 1), and the extension shape of the bottom plate 1A is the same. The main board 2 is strongly held and protected. Therefore, in handling the recording / reproducing apparatus, even if an unexpected accident such as accidentally hitting the apparatus against something occurs, it is possible to prevent the trouble that the main board 2 is broken and the apparatus cannot be used.

Next, the specification setting switch 2C will be described. Although there are a plurality of combinations of electrical connections of a plurality of terminals of the specification setting switch 2C, a plurality of interface pin specifications are set in advance corresponding to each combination. The specification setting switch 2C is arranged between the power supply connector 2B and the interface connector 2A, and the specification setting switch 2C is maintained even after the shield cover 3 is attached (the recording / reproducing apparatus is completed).
By changing the electrical connection of a plurality of terminals of C, the pin specifications of the desired interface can be changed. Therefore,
Since the interface specifications different for each host can be easily changed in the completed state of the recording / reproducing apparatus, there is an advantage that the user can change the specifications by himself / herself.

[0016]

As described above, according to the present invention, the shape of the main board fixed to the rear portion on the bottom plate of the chassis formed of sheet metal and the shape of the rear portion of the chassis bottom plate are configured to have substantially the same shape. Therefore, there is an effect that the strength protection of the main board can be achieved by using inexpensive parts.

Further, since the interface specifications different for each host can be easily changed in the completed state of the recording / reproducing apparatus, the user can change the specifications by himself / herself, the flexibility for the specification change in mass production can be improved, and the delivery time can be shortened to the user. The practical effect of the present invention is extremely large.

[Brief description of drawings]

FIG. 1 is a plan view of a main part of a recording / reproducing apparatus of the present invention.

FIG. 2 is a side view of a main part of the recording / reproducing apparatus of the present invention.

FIG. 3 is an overall perspective view of a recording / reproducing apparatus of the present invention.

[Explanation of symbols]

 1 ・ ・ ・ ・ ・ ・ ・ Chassis 2 ・ ・ ・ ・ ・ ・ ・ Main board 3 ・ ・ ・ ・ ・ ・ Shield cover 4 ・ ・ ・ ・ ・ ・ Connector holding member

Claims (3)

[Claims] 1. A chassis made of an integral sheet metal comprising a bottom plate, two side plates formed on both side surfaces of the bottom plate, and a rear plate formed behind the recording and reproducing device from the bottom plate, and a recording / reproducing device. A recording / reproducing circuit for recording and / or reproducing a signal on a medium, a control circuit for controlling the recording / reproducing circuit, an interface circuit and an interface connector for exchanging signals with a host, and a voltage from the host side. A power supply circuit and a power supply connector, a specification setting switch for setting interface specifications according to the circuit specifications of the host, a main board fixed on the bottom plate of the chassis, and both sides of the chassis. A shield cover for shielding electromagnetic noise from the outside, while covering the recording / reproducing device with the plate and the rear plate as guides, The bottom plate of the chassis has a shape that is extended to the rear of the recording / reproducing device with respect to the rear plate, and has an opening of the rear plate that is determined according to the developed shape of the sheet metal according to the extended shape of the bottom plate, and the main substrate is the A recording / reproducing apparatus characterized in that the bottom plate is configured to have a shape substantially the same as the extension shape of the bottom plate up to the extension shape portion of the bottom plate through the opening of the rear plate. 2. The recording / reproducing apparatus according to claim 1, wherein the interface connector and the power connector are arranged above an extension of the bottom plate on the main board. 3. The disk device according to claim 1, wherein the specification setting switch is arranged above the extended shape portion of the bottom plate on the main board.