JPH04305883A - Magnetic recording/regenerating device - Google Patents

Abstract

PURPOSE:To improve the reliability of the recording/regeneration and to eliminate the deterioration of an error rate caused by dust stuck to a drum rotary head. CONSTITUTION:A separating board 12 is provided between a driving mechanism room 8 and a second board containing room 13 so as to shield air flow from front to rear and an air duct 15 is provided on the upper side of this separating board 12 so as to take out outside air brought in from a cassette loading and unloading port 2 to the board containing room 13. Thus, the outside air absorbed into the air duct 15 from the cassette loading and unloading port 2 by a motor fan 4 is flown to the second board containing room 13 and spewed out of a casing 1 and the entering of dust into the driving mechanism room 8 is eliminated.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording and reproducing apparatus suitable for use in, for example, video cassette tape recorders.

0002

2. Description of the Related Art In general, in magnetic recording and reproducing apparatuses such as video cassette tape recorders (hereinafter referred to as VTRs), a temperature rise inside the VTR housing is prevented by forcing air by rotation of a fan. In particular, the heat generated from the printed circuit board inside the housing is high and requires efficient cooling.

Conventionally, this type of magnetic recording/reproducing device is usually provided with a fan at the rear of the casing, and is configured to suck outside air into the casing from the front, cool the printed circuit board, and blow it out to the rear.

By the way, in this type of magnetic recording/reproducing apparatus, a lid for opening and closing the cassette insertion/extraction opening is provided in the front part of the housing to prevent dust from entering.

[0005]

However, in conventional magnetic recording and reproducing apparatuses, the cassette insertion/extraction port is opened when the cassette is inserted/extracted, so that dust and air are sucked into the housing. As a result, there is a problem in that dust accumulates on the positioning portion and sliding portion of the tape running system in the drive mechanism chamber, changing the tape height or the tape loading position, and reducing reliability in recording and reproduction.

[0006] Furthermore, there is another problem in that the dust entering the drive mechanism chamber collides with and adheres to the rotating head of the drum, causing a worsening of the error rate.

The present invention has been made in view of the above circumstances, and it is possible to improve the reliability in recording and reproduction, and also to eliminate the cause of deterioration of the error rate due to dust adhesion to the drum rotating head. The present invention provides a magnetic recording and reproducing device.

[0008]

[Means for Solving the Problems] A magnetic recording/reproducing device according to the present invention is provided with a partition plate for blocking air flow from the front to the rear between the drive mechanism chamber and the substrate storage chamber. It is equipped with an air duct that guides outside air introduced from the cassette insertion/extraction port into the substrate storage chamber.

[0009]

[Operation] In the present invention, outside air sucked into the air duct from the cassette insertion/extraction port by the fan can be caused to flow into the substrate storage chamber at the rear of the drive mechanism chamber and discharged out of the casing.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure of the present invention will be explained in detail with reference to embodiments shown in the drawings.

FIGS. 1A and 1B are a plan view and a side view showing the internal structure of a magnetic recording and reproducing apparatus according to the present invention, and FIG.
FIG. 2 is a perspective view showing the internal structure of the magnetic recording/reproducing device. In the figure, the reference numeral 1 denotes a VTR housing having a cassette insertion/extraction port 2 opening at the front, and a control panel 3 having a large number of switches (not shown) attached to the front part. A cooling motor fan 4 is provided at the rear portion for introducing outside air into the housing from the front and leading it out to the rear. Inside the housing 1, a cassette compartment 7 and a drive mechanism chamber 8, each capable of accommodating a cassette 5 and a drum 6, are formed adjacent to each other in the front-rear direction.

A first board storage chamber 10 is formed below the drive mechanism chamber 8 and the cassette compartment 7 with a base plate 9 in between. In this first board storage chamber 10, a large number of processor card boards 11 are stored at intervals in the vertical direction.

Reference numeral 12 denotes a partition plate that blocks air flow from the front to the rear of the drum 6, and is housed within the housing 1 and attached to the base plate 9. Behind this partition plate 12, the first board storage chamber 1
A second board storage chamber 13 adjacent to 0 is formed. Inside this second board storage chamber 13, a large number of TTP card boards 14 are arranged in parallel at intervals in the front-rear direction.

Reference numeral 15 denotes an air duct having an air suction port 15a that opens to the cassette insertion/extraction port 2 and an air discharge port 15b that opens to the second board storage chamber 13. A cutout 16 is provided above the cassette compartment 7 and the drive mechanism chamber 8, and a cutout 16 through which a portion of the drum 6 faces is formed at the rear center portion. This air duct 15 has the cutout 16
The air discharge port 15b is branched to open in two directions, left and right, and is configured to lead outside air introduced from the cassette insertion/extraction port 2 into the second board storage chamber 13.

Further, reference numeral 17 includes the cassette compartment 7 and the drive mechanism chamber 8 behind the cassette insertion/extraction port 2.
An air filter 19 is rotatably provided in the upper part of the casing 1 and is installed above the tape running system 18 of the cassette 5 to connect the cassette insertion/extraction opening 2. Lid bodies 20 and 21, which are opened and closed, are a motherboard housed in the rear part of the housing 1, and a and b are slits for air suction that open to the front and upper sides of the housing 1. Note that the arrow in the figure indicates the direction of air flow.

[0016] In the VTR configured in this way,
The outside air sucked into the air duct 15 from the air suction port 15a by the rotation of the motor fan 4 is transferred to the air discharge port 15b.
It can flow into the second board storage chamber 13 behind the drive mechanism chamber 8 and be discharged outside the housing 1.

Therefore, in this embodiment, since it is possible to prevent dust from entering the drive mechanism chamber 8, it is possible to prevent dust from accumulating on the positioning section and sliding section of the tape running system 18. There is no change in tape height or tape loading position.

Furthermore, in this embodiment, the drive mechanism chamber 8
Being able to prevent dust from entering the drum 6 can prevent dust from colliding with and adhering to the rotating head of the drum 6.

Furthermore, in this embodiment, the air duct 15 connects the cassette insertion/extraction port 2 and the second board storage chamber 13.
Since the TTP card board 14 is in communication with the outside air, the TTP card board 14 can be sufficiently supplied with outside air.

Furthermore, in this embodiment, since the air duct 15 can have a double ceiling structure using the top plate 1a of the casing 1, the top plate 1a of the casing 1 can be reinforced. Can be done.

In addition, in this embodiment, since the air filter 17 is interposed between the cassette compartment 7 and the drive mechanism chamber 8, it is possible to absorb the tape striking sound of the drum 6 as a noise source, thereby reducing noise. level can be reduced.

It goes without saying that the shape of the air duct 15 and the number of motor fans 4 in the present invention are not particularly limited.

[0023]

As explained above, according to the present invention, a partition plate is provided between the drive mechanism chamber and the board storage chamber to block the air flow from the front to the rear, and a cassette insertion/removal plate is provided above the partition plate. Since we have provided an air duct that directs the outside air introduced through the opening into the board storage chamber, the outside air sucked into the air duct from the cassette insertion/extraction port by the fan can flow into the board storage chamber and be discharged to the outside of the casing. It can prevent dust from entering.

[0024]Accordingly, it is possible to prevent dust from accumulating on the positioning part and sliding part of the tape running system, so the tape height or the tape loading position does not change and reliability in recording and reproduction can be improved. can.

Furthermore, since it is possible to prevent dust from entering the drive mechanism chamber, it is possible to prevent dust from colliding with and adhering to the drum rotating head, thereby eliminating the cause of deterioration of the error rate.

Furthermore, since the cassette insertion/extraction port and the board storage chamber are communicated with each other by the air duct, a sufficient amount of outside air can be supplied to, for example, a card board in the board storage chamber, and this card board can be efficiently cooled. There is also the advantage that it can be done.

[Brief explanation of drawings]

FIG. 1 (A) and (B) are a plan view and a side view showing the internal structure of a magnetic recording/reproducing device according to the present invention.

FIG. 2 is a perspective view showing the internal structure of the magnetic recording/reproducing device according to the present invention.

[Explanation of symbols]

1... Housing, 2... Cassette insertion/extraction port, 4... Motor fan, 6
...Drum, 7...Cassette compartment, 8...Drive mechanism chamber, 12...Partition plate, 13...Second board storage chamber, 14...
TTP card board, 15...Air duct.

Claims (1)

[Claims] Claim 1: A housing having a cassette insertion/extraction port opening at the front, a drive mechanism chamber and a board storage chamber adjacent in the front and back direction, and a cooling fan that introduces outside air into the housing from the front and draws it out to the rear. In the magnetic recording/reproducing device, a partition plate is provided between the drive mechanism chamber and the substrate storage chamber to block air flow from the front to the rear, and the cassette is introduced from the cassette insertion/extraction port above the partition plate. 1. A magnetic recording and reproducing apparatus, further comprising an air duct for guiding outside air into the substrate storage chamber.