JPS61122990A - Chassis structure of magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve an assembling ability and a service to attain a compact size by having a structure attaching parts from an upper part, holding a rear part of a mechanical deck by a holding section of an arch shape of a chassis frame body and slidably mounting a main base plate between this holding part and a bottom face. CONSTITUTION:In case of inspecting and repairing a main base plate unit 17, a screw 16b is removed, the unit 17 is drawn out rearward and an end of both side reinforcing plate 21 is inserted into a temporarily fastening hole 11c of a bottom face 11a of a chassis frame body 11. Thereby, the unit 17 is temporarily held at a predetermined angle to carry out an inspection operations and the like easily. In the inspection and the repair of a bottom part of a mechanical deck 12, a screw 16a is removed, and a temporarily fixing piece 12a of the mechanical deck 12 is inserted into a temporarily fixing hole 15a of a holding part 15. Thereby, the piece 12a and an attaching section 13 hold a longitudinal side section 15d of the part 14, and the mechanical deck 12 is temporarily fixed and held to easily carry out an inspecting operation and the like.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention improves the chassis structure of a magnetic recording/reproducing device (hereinafter referred to as VTR), particularly its ease of assembly and serviceability.
The present invention also relates to a VTR chassis structure that can achieve low cost and compactness.

[Conventional technology]

Figure 7 shows the chassis structure of a conventional general VTR.

It is schematically shown in FIG. In the figure, 1 is a chassis frame integrally molded from plastic etc., 2 is a mechanical deck,
This includes a mounting portion 3 having a mounting hole 3a, and is screwed onto a holding boss 4 provided on the chassis frame 1 with a screw 5a.

6.7.8 are a first substrate unit, a second substrate unit, and a third substrate unit, respectively, and the first substrate unit 6.
is screwed onto the boss 1a on the side of the mechanical deck 2 from above with a screw 5b, and the second board unit 7 is attached to the chassis frame 1 at one end by a hinge member 9 at the top of the first board unit 6. It is rotatably attached, and the other end is screwed onto the boss 1b with a screw 5c. Also, the third
The board unit 8 is rotatably attached to the chassis frame 1 by a hinge member 9 at one end below the mechanical deck 2, and the other end is screwed to the boss IC by a screw 5c.

The reason why the second board unit 7 and the third board unit 8 are rotatable is because of wiring work and inspection during assembly.
This is to facilitate service work such as repair.

In addition, as shown in Fig. 2, the bottom surface 1g located below the first board unit 6 of the chassis frame 1 has an approximately An opening 1e of equal size is formed, and an opening 1f for servicing the bottom surface of the mechanical deck 2 is formed below the mechanical deck 2 of the chassis frame 1, as shown in FIG. 8 (al). , a bottom cover 10 covering the opening 1e and the lower part of the third board unit 8 is screwed in from the bottom by a screw 5.
It is screwed on with d.

[Problem that the invention seeks to solve]

In the conventional chassis structure described above, the mounting directions of the first to third board units 6, 7, and 8 to the chassis frame 1 are different, and the structure is overlapped (stacked), so there is no space between each board unit. Wiring work becomes complicated and assembly is difficult.

■ It is necessary to rotate each board unit during inspection, repair, and other services, but in particular, the third board unit 8 is designed to rotate toward the bottom side, so in order to rotate it, the VTR set is required. This is extremely inconvenient, as it is impossible to do so unless the bottom cover 10 is removed by laying the device on its side.

■ The mounting method for each board unit is different, which increases the number of mounting members and man-hours, resulting in high costs.Also, the board unit requires rotation, which requires space and increases the chassis size.

There was a drawback.

This invention has been made to eliminate the above-mentioned drawbacks of the conventional structure, and its purpose is to provide a chassis structure for a magnetic recording/reproducing device that is low-cost and compact, with improved assembly and serviceability.

[Means for solving problems]

The present invention provides a chassis structure for a magnetic recording/reproducing device, including:
Components are attached to a box-shaped chassis with an open top surface only from the top, and the rear part of the mechanical deck is held by a second holding part formed in an arch shape on the chassis frame. A board unit integrated into one block is slidably mounted between the chassis frame and the bottom surface of the chassis frame.

[Effect]

In the present invention, parts are assembled through the opening in the chassis frame, and repairs to the board unit are performed by pulling out the board unit from between the second holding part and the chassis frame.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view schematically showing an embodiment of the present invention, and FIG. 2 is a cross-sectional side view thereof. In the figure, 11
The chassis frame is integrally molded from plastic and has a box-like shape with an open top. Reference numeral 12 denotes a mechanical deck, which is provided with a mounting portion 13 having a mounting hole 13a as in the conventional example.

A first holding part 14 for holding the front part of the mechanical deck 12 is provided at the front part of the chassis frame 11, and this is integrally formed in the shape of a boss on the bottom surface 11a of the chassis frame 11. Further, a second holding portion 1 for holding the rear part of the mechanical deck 12 is provided approximately at the center of the chassis frame 11.
5 is formed. This second holding portion 15 is shaped like a planar letter, and the tip of its vertical side portion 15d and the horizontal side portion 15C are integrally formed with the side surface 11e and bottom surface 11a of the chassis frame 11, respectively. 15d has an arch shape with respect to the bottom surface 11a of the chassis frame 11, and the vertical side 15d has a fixing boss 15a and a temporary fixing hole 15.
b is formed.

In this way, the mechanical deck 12 is fixed at its front part to the first holding part 14 and at its rear part to the fixing boss 15a of the second holding part 15 by screws 16a.

Reference numeral 17 denotes a main board unit on which most of the main circuit components are mounted, and is formed by combining one board or a plurality of boards. Reference numeral 18 denotes an external connection terminal board, which is electrically and mechanically connected to the main board unit 17. Reference numerals 19 and 20 denote a substrate support stand and a substrate guide formed integrally with the chassis frame 11, between which the main substrate unit 17 can slide. Also, 21 is a reinforcing plate,
This is fixed to both sides of the main board unit 17 with plastic rivets 22 or the like.

Next, the functions and effects will be explained using FIGS. 2 to 4. In a normal state, the main board unit 17 is inserted between the board support stand 19 and the board guide 20 from the rear of the chassis frame 11 to the bottom surface 11a of the chassis frame 11, as shown in FIG.
The mounting hole 1 of the external connection terminal 18 is inserted into the mounting boss 11b provided on the rear surface of the chassis frame 11 with a screw 16b.
The main board unit 17 is attached to the chassis frame 11 in this way.

When inspecting and repairing the main board unit 17, the third
As shown in the figure, after removing the screws 16b, pull out the main board unit 17 to the rear, and insert the reinforcing plates 21 on both sides of the main board unit 17.
Insert the tip into the temporary fixing hole 11C provided in the bottom surface 11a of the chassis frame 11. Thereby, the main board unit 17 can be temporarily held at a predetermined angle, and inspection work etc. can be easily performed in this state.

When inspecting or repairing the bottom of the mechanical deck 12,
As shown in Fig. 4, remove the screw 16a and remove the mechanical deck 12.
Insert the temporary fixing piece 12a provided in the temporary fixing hole 15a of the second holding part 15. Then, as a result, the temporary fixing piece 12
a and the mounting portion 13 sandwich the vertical side portion 15d of the second holding portion 15, and as shown in the figure, the mechanical deck 12 is temporarily held and inspection work etc. can be easily performed in this state. can.

This embodiment configured as described above has the following effects.

■ Easy wiring work and extremely easy to assemble.

■ When performing services such as inspection or repair, the main board unit 17 can be pulled out without having to tip the main body sideways.
It is sufficient to simply insert the reinforcing plate 21 into the temporary fixing hole 11c, and when servicing the mechanical deck 12, there is no need to remove the bottom cover, which was conventionally required, and the reinforcing plate 21 can be inserted into the temporary fixing hole 15b of the second holding part 15. It is extremely simple as all you need to do is

(2) The main board unit) 17 is made of a chassis frame 11.

FIG. 5 shows a modification of the second holding part 15 of the above embodiment. Holding part 25
The screw 16 is attached to the boss lid provided on the chassis frame 11.
It is fixed with c.

This holding part 25 is advantageous when higher rigidity is required.

FIG. 6 is a side sectional view showing another embodiment of the present invention, and in the figure, the mechanical deck 12 is held tilted forward at a predetermined angle with respect to the chassis frame 11. Reference numeral 23 denotes an automatic cassette loading device, which has a mechanism for loading a cassette tape 24 into the mechanical deck 12 which is tilted forward, and after the cassette tape 24 is inserted and guided in a horizontal direction, it is also loaded tilted forward. . This structure allows the space under the mechanical deck 12 to be enlarged, and therefore the main board unit 1
This is effective when a relatively tall component is to be placed on the mechanical deck 12, and the recording and playback section 26 of the mechanical deck 12 becomes an ineffective space when using a conventional automatic cassette loading device. In this case, the mechanical deck is tilted so that the space can be used effectively.

〔Effect of the invention〕

As described above, according to the present invention, parts are attached only from the top, and the rear part of the mechanical deck is held by fixing it to an arch-shaped holding part formed on the chassis frame. Since the main board unit integrated into one block is slidably mounted between the arch-shaped holding part and the bottom surface, it has the effect of greatly improving ease of assembly and serviceability, as well as reducing costs and making it more compact. It has the effect of achieving

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view schematically showing the chassis structure of a magnetic recording/reproducing device according to an embodiment of the present invention, Fig. 2 is a cross-sectional side view thereof, and Fig. 3 is a temporary fixing of the main board unit during service. FIG. 4 is a cross-sectional side view showing the state of the mechanical deck temporarily fixed during service; FIG. 5 is an exploded perspective view showing a modification of the second holding part of the above embodiment;
Fig. 6 is a cross-sectional side view schematically showing another embodiment of the present invention, Fig. 7 is an exploded perspective view schematically showing a conventional general chassis structure, and Figs. 8(a) and (b). are respectively cross-sectional side views thereof. 11--Chassis frame body, 11a...-Bottom surface, 11
c-=temporary fixing hole (temporary fixing holding means), 12... mechanical deck, 14.15... 1st. Second holding part, 15b
... Temporary fixing hole (temporary fixing holding means), 17... Main board unit, 18... External connection terminal board.

Claims (5)

[Claims] (1) First and second holding parts for holding the front and rear parts of the mechanical deck are formed on a box-shaped chassis frame with an open top surface, and the second holding part is on the bottom surface of the chassis frame. A magnetic recording/reproducing device characterized in that the main board unit is formed in an arch shape and has main circuit components mounted thereon between the second holding part and the bottom surface of the chassis frame. Chassis structure. (2) The chassis frame is partially constituted by an external connection terminal board that is coupled to the rear end of the main board unit and screwed onto the chassis frame when the main board unit is attached to the chassis frame. A chassis structure for a magnetic recording/reproducing device according to claim 1, characterized in that: (3) The magnetic recording medium according to claim 1 or 2, wherein the chassis frame is provided with means for temporarily supporting the main board unit pulled out from the chassis frame at a predetermined angle. Chassis structure of playback device. (4) The second holding part is provided with means for temporarily supporting the mechanical deck removed from the first holding part and the second holding part at a predetermined angle.
Chassis structure of the magnetic recording/reproducing device according to any one of Items 1 to 3. (5) The first and second holding parts are adapted to hold the mechanical deck while tilting it forward at a predetermined angle. Chassis structure of magnetic recording/reproducing device.