JPH05342833A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To simply assemble the magnetic recording and reproducing device with a few electric connections and moreover to make its mechanical assembly possible by separating mechanical constitutive elements and electrical constitutive elements, constituting the magnetic recording and reproducing device, from each other as much as possible. CONSTITUTION:The device possesses a 1st guide member 12 for positioning a printed board 10 underneath a mechanism and a mechanism chassis 1 into a frame 11 and a 2nd guide member 13 for positioning the mechanism chassis 1 to the printed board 10 underneath the mechanism. The mechanism chassis 1 is guided by the 1st guide member 12 to the printed board 10 underneath the mechanism without damaging tall electric parts 7, 8 and 9. Then, a positional relationship between the printed board 10 underneath the mechanism and the mechanism chassis 1 is decided by the 2nd guide member 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus, and in particular, it greatly improves workability during assembly.

[0002]

2. Description of the Related Art Generally, a magnetic recording / reproducing apparatus such as a VTR or a DAT is roughly divided into three components. One is a tape running system in which a tape is pulled out from a cassette and wound around a rotary head cylinder. Is a mechanical component that forms a recording medium, one is an electrical component that includes a processing circuit that processes a recording and reproduction signal or a control circuit that performs various controls, and one is a mechanical component and an electrical component. It is a frame that houses the components.

A conventional configuration of the above-mentioned magnetic recording / reproducing apparatus will be described below with reference to the drawings.

FIG. 6 is an exploded perspective view showing a schematic structure of a conventional magnetic recording / reproducing apparatus. In the figure, a mechanical chassis 1 is shown.
Above, a supply side reel stand 2, a take up side reel stand 3, a rotary head cylinder 4, a capstan 5, a pinch roller 6, and a drive motor (not shown) for forming a tape running system. In order to detect the presence or absence of a erroneous erasure prevention tab provided on the cassette, as well as a mechanical component such as (1) and the like, and a light emitting section 7 and a light receiving section 8 for detecting the start and end of the magnetic tape. The erroneous erasure prevention detection unit 9 is implanted.

Further, the printed circuit board 10 under the mechanism has a resistor,
Various electric circuits (not shown) including transistors, ICs, etc. are formed, and a guide member 12 for housing and holding the mechanical chassis 1 and the mechanical lower printed circuit board 10 is further implanted in the frame 11. ..

Here, the assembly is performed along the guide member 12 provided on the frame 11 under the mechanical printed circuit board 1.
0 and the mechanical chassis 1 are sequentially inserted. At this time, various lead wires (not shown) arranged in the mechanical chassis 1 are electrically connected to the mechanical lower printed circuit board 10 to assemble them. Is complete.

[0007]

However, in the above-described conventional configuration, the mechanical components and the electrical components that compose the magnetic recording / reproducing apparatus coexist, so that the electrical wiring inside the mechanical chassis 1 is It becomes complicated, and it becomes necessary to electrically connect a large number of lead wires from various positions of the mechanical chassis 1 to the printed circuit board 10 under the mechanism at the time of assembling, which makes the assembling work extremely complicated and assembling by a machine such as a robot. Was very difficult.

Further, even if the electric parts arranged on the mechanical chassis 1 are to be arranged on the printed circuit board 10 below the mechanism as much as possible, the start / end detecting portions 7 and 8 and the erroneous erasure preventing detecting portion 9 are not provided. The tall parts made it difficult.

The present invention is intended to solve the above-mentioned conventional problems, and by separating the mechanical constituent elements and the electric constituent elements constituting the magnetic recording / reproducing apparatus as much as possible, the electrical connection is reduced and the assembling is reduced. An object of the present invention is to provide a magnetic recording / reproducing apparatus which is easy to work and can be assembled by a machine.

[0010]

To achieve the above object, the present invention provides a first guide means for positioning a mechanical lower printed circuit board and a mechanical chassis at predetermined positions with respect to a frame, and the mechanical lower printed circuit board. And second guide means for positioning the mechanical chassis at a predetermined position,
The first guide means guides the mechanical chassis to the mechanical lower printed board without damaging the protruding parts, and the second guide means guides the mechanical lower printed board to the second mechanical guide. The means determines the positional relationship between the mechanical lower printed circuit board and the mechanical chassis.

Further, when the positioning of the mechanical lower printed circuit board and the mechanical chassis by the second guide means is completed, the wiring terminals arranged on the mechanical chassis and the connectors provided on the mechanical lower printed circuit board are It is configured to be electrically connected.

[0012]

With this structure, the mechanical and electrical components of the magnetic recording / reproducing device can be separated as much as possible, so that the electrical wiring in the mechanical chassis can be simplified and the mechanical print can be performed. The number of electrical connections to the board can be minimized, and the electrical connections can be made by a very simple operation.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing the configuration of an embodiment of the magnetic recording / reproducing apparatus of the present invention. The same components as those in the conventional example are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 1, the printed circuit board 1 under the mechanism
In 0, only mechanical components for forming a tape running system are mounted on the mechanical chassis 1 as much as possible.
Tall electric parts such as the light emitting part 7 and the light receiving part 8 for detecting the start and end of the magnetic tape and the erroneous erasure prevention detecting part 9 are planted so that the light emitting part 7 can be projected onto the mechanical chassis 1. The mechanical chassis 1 at the corresponding position has a light emitting portion 7
A through hole 1c that is slightly larger than the above is provided. Further, the mechanical lower printed circuit board 10 is formed to be slightly larger than the mechanical chassis 1, so that the pair of the light receiving portion 8 and the erroneous erasure prevention detecting portion 9 can protrude from the side surface portion of the mechanical chassis 1 onto the mechanical chassis 1. , Its planting position has been determined.

Hereinafter, a method of assembling the magnetic recording / reproducing apparatus having the above structure will be described with reference to the drawings.
First, the first guide member 12 provided on the frame 11
By positioning the printed circuit board 10 below the mechanism, the printed circuit board 10 below the mechanical position is determined. In this embodiment, the first guide member 12 and the through hole 10
The mechanical lower printed circuit board 10 is positioned by engaging with a and 10b, but the invention is not limited to this, and protrusions (not shown) are formed on the frame 11 so as to surround the four corners. However, the means is not limited as long as the printed circuit board 10 under the mechanism can be positioned.

Next, the mechanical chassis 1 is guided along the first guide member 12, and at this time, the first guide member 1 is guided.
The height of 2 is higher than any of the tall parts (7, 8, 9) implanted in the mechanical lower printed circuit board 10, and the through hole 1a that engages with the first guide member 12 is formed. , 1b are also formed to be a little larger, so that before the tall parts come into contact with the mechanical chassis 1,
Can be guided to a predetermined position, and the mechanical chassis 1 can be guided without damaging tall components.

Finally, since the positioning of the mechanical chassis 1 is insufficient only with the first guide member 12, the mechanical chassis 1 is provided with the second guide member 13 having the first and second bearing portions 13a and 13b which will be described later. 1 is securely positioned and held with respect to the printed circuit board 10 below the mechanism. At this time, the wiring terminals (not shown) arranged in the mechanical chassis 1 and the connector are electrically connected when the positioning by the second guide member 13 is completed.
As a result, it is possible to perform all the series of work including the connection of electrical wiring by the machine, and it is possible to greatly improve the work efficiency.

Here, the positioning of the mechanical chassis 1 by the second guide member 13 will be described with reference to the drawings. 2 is a plan view of the mechanical chassis and the mechanical lower printed circuit board of this embodiment as seen from above, FIG. 3 is a plan view of the mechanical chassis and mechanical lower printed circuit board of FIG. 2 as seen from the back, and FIG. 4 is the same embodiment. 5 is a plan view showing the configuration of the second guide member, FIG.
(A), (b) is sectional drawing which shows the structure of the same 2nd guide member.

As shown in the figure, the second guide member 1
3 is composed of first and second bearing portions 13a and 13b, and shaft portions 15a and 16a of gears 15 and 16 provided in the lower surface of the mechanical chassis 1 are inserted and guided to the mechanical lower printed circuit board. The positioning of the mechanical chassis 1 is determined.

That is, as shown in FIG. 5, the shaft portions 15a and 16a of the gears 15 and 16 are guided by the first guide member 12.
Is guided over slightly larger guide holes 13c, 13d provided in the first and second bearing portions 13a, 13b, so that the mechanical chassis 1 is inserted along the first guide member 12 as it is. And the shaft portions 15a and 16a are the guide holes 1
You will be guided to 3c and 13d. When the mechanical chassis 1 is further inserted, the shaft portions 15a and 16a are guided into the guide holes 13c and 1a.
Since the shaft portions 15a and 16a are guided along the 3d, the shaft portions 15a and 16a are inserted into the positioning holes 13e and 13f, which are the final positioning positions, thereby enabling highly accurate positioning.

The sizes of the guide holes 13c and 13d and the positioning holes 13e and 13f are 13d>13c> 13.
f> 13e, which leads to the second
Even if there are variations in dimensional accuracy, mounting accuracy, etc. of the guide member and the gears 15a, 15b, etc., they can be absorbed.

In this embodiment, the gears 15, 16 out of several gears for transmitting the driving force of the drive gear 17 to the supply side reel base gear 2a and the take up side reel base gear 3a.
Although the number of parts of the positioning member is reduced by using the shaft portions 15a and 16a of, the number of parts of the positioning member is not limited to this, and a part of the mechanical chassis 1 is projected from the lower surface and is used for positioning. The same effect can be obtained by performing.

[0023]

As is apparent from the above description, according to the present invention, it is possible to separate the mechanical element and the electric element constituting the magnetic recording / reproducing apparatus as much as possible, so that the electric wiring in the mechanical chassis is obtained. In addition to being simple, the number of electrical connections to the printed circuit board under the mechanism can be minimized, and the workability during assembly can be greatly improved. In addition, a series of operations during assembly can be performed mechanically, and workability during assembly can be further improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a schematic configuration of an embodiment of a magnetic recording / reproducing apparatus of the present invention.

FIG. 2 is a plan view of the mechanical chassis and the mechanical lower printed circuit board of the embodiment as seen from above.

FIG. 3 is a plan view of the mechanical chassis and the mechanical lower printed circuit board of the embodiment as seen from the back side.

FIG. 4 is a plan view showing the configuration of a second guide member of the same embodiment.

FIG. 5 is a cross-sectional view showing a configuration of a second guide member of the same embodiment.

FIG. 6 is an exploded perspective view showing a schematic configuration of a conventional magnetic recording / reproducing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mechanical chassis 7 Light emitting part 8 Light receiving part 9 Erase prevention detection part 10 Mechanical lower printed circuit board 11 Frame 12 First guide member 13 Second guide member 14 Connector

Claims (2)

[Claims] 1. A mechanical chassis equipped with a mechanical mechanism for drawing a magnetic tape from a tape cassette and winding the magnetic tape around a rotary head cylinder to form a tape running system,
A mechanical lower printed circuit board, which is connected to a processing circuit for processing an electrical signal, and which has a protruding component that protrudes above the mechanical chassis when the mechanical lower printed circuit board and the mechanical chassis are arranged below the mechanical chassis. And a first guide means for positioning the mechanical lower printed circuit board and the mechanical chassis at predetermined positions with respect to the frame, and the mechanical chassis at predetermined positions with respect to the mechanical lower printed circuit board. Second guiding means for positioning, the first guiding means guides the mechanical chassis to the mechanical lower printed circuit board without damaging the protruding parts, and the second guiding means controls the mechanical lower board. A magnetic recording / reproducing apparatus characterized by determining a positional relationship between a printed circuit board and the mechanical chassis. 2. When the positioning of the mechanical lower printed circuit board and the mechanical chassis by the second guide means is completed, the wiring terminals arranged on the mechanical chassis and the connectors provided on the mechanical lower printed circuit board are The magnetic recording / reproducing apparatus according to claim 1, wherein the magnetic recording / reproducing apparatus is electrically connected.