JPH0846367A - Protective cover - Google Patents

Abstract

PURPOSE:To obtain a protective cover which can be secured easily at the time of assembly and can be removed easily at the time of service check, e.g. repair. CONSTITUTION:A mechanical chassis 12 is provided, on the front face part and the rear part, with a plurality of stop parts 12a-12c and more than one positioning pins 12d, 12e. A protective cover 20 is provided with claw parts 20a-20c and holes 20d, 20e being engaged, respectively, with the stop parts 12a-12c and the positioning pins 12d, 12e. At the time of assembling, the protective cover 20 can be secured to the mechanical chassis 12 by simply mounting the cover 20 thereon from above. Even if an independent component is present immediately in the vicinity of the rear part, the protective cover 20 is removed from the front face part and turned about the stop part on the rear surface part. Consequently, the protective cover 20 is removed from the positioning pins and when it is moved rearward, the claw parts can be disengaged and thereby the protective cover 20 can be removed from the mechanical chassis 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective cover device for easily removing the protective cover when checking service such as repair of household electric appliances.

[0002]

2. Description of the Related Art In recent years, in electric appliances for home use, a protective cover has become indispensable for the safety of consumers or for preventing malfunction.

Referring to the drawings, a conventional home electric device will be referred to as a compact disc player (hereinafter abbreviated as CD).
Player).

FIG. 5 is a perspective view showing a part of a conventional CD player as seen through. In FIG. 5, reference numeral 1 denotes a loading mechanism main body, which is fixed to the chassis 2 with four screws 4a to 4d. 3 is a housing,
A front panel 5 is provided on the front surface. Reference numeral 7 denotes a main printed circuit board on which electronic components that electrically process a music signal and that constitute a predetermined circuit that controls the operation of the mechanism are mounted. Reference numerals 8 and 9 denote a loading cable and a servo flat cable, respectively, for transmitting electric signals to the loading mechanism body 1 side. Reference numeral 6 denotes operation buttons, and by these operations, the loading mechanism body 1
The tray 10 can be opened / closed and the traverse 11 can be moved up and down.

FIG. 6 shows a perspective view of the loading mechanism body 1. In the figure, the tray 10 is open. Reference numeral 16 is an intermediate chassis, and the traverse 11 is located further inside. A mechanical chassis 12 holds mechanism parts such as the tray 10 and the pulley gear 18. A belt 17 transmits the power of the motor. An opening 10a is formed in the vicinity of the center of the tray 10 so that the traverse 1 can be played when the disc is played.
Since 1 rises to this part, it has this shape.

A clamp plate 13 is provided with screws 14a and 14b.
Mechanical chassis 1 by tightening the
Fixed to 2. Further, reference numeral 15 is a clamper, which plays a role of holding down a disc to be played and is provided on the clamp plate 13.

[0007]

However, in the conventional structure as described above, when the tray 10 is open, the pulley gear 18 and the belt 17 can be touched by hand from the opening 10a of the tray 10, so that the pulley gear 18 can be touched. 1
8 is damaged, or the belt 17 is disengaged from the pulley gear 18 to cause a malfunction, or the tray 10 cannot be opened / closed.

The present invention has been made in view of the above conventional problems, and an object thereof is to provide a protective cover device which can prevent malfunctions and can be easily removed at the time of checking such as repair.

[0009]

In order to solve the above problems, a protective cover device of the present invention is a protective cover device in which a protective cover is attached to a mechanical chassis provided with drive transmission means such as gears. A plurality of locking portions are provided on the front and rear portions of the mechanical chassis, and two or more positioning pins are provided near the front of the mechanical chassis, while the protective cover engages with the locking portions and the positioning pins, respectively. It is equipped with a matching claw part and a positioning hole, and can be fixed by simply mounting it from the top of the mechanical chassis during assembly.When removing it, the claw part on the front part is removed and the mechanism is rotated around the locking part on the rear part. By disengaging from the positioning pin of the chassis and further moving in the rearward direction, the pawl portion is disengaged from the rear engaging portion.

[0010]

With the above-described structure, the present invention can be fixed to the mechanical chassis by simply mounting it from the upper part of the mechanical chassis at the time of assembly.
By removing the claws on the front part and rotating around the locking part of the rear part, it disengages from the positioning pins of the mechanical chassis and further moved toward the rear part to lock the rear part of the mechanical chassis. The claw portion of the protective cover can be removed from the section, and as a result, the protective cover can be removed from the mechanical chassis.

[0011]

Embodiments of the protective cover device of the present invention will be described below in detail with reference to FIGS. here,
The same parts as those in the above-mentioned conventional example are designated by the same reference numerals and the description thereof will be omitted. FIG. 1 is a perspective view of a loading mechanism body according to an embodiment of the present invention.

In FIG. 1, a mechanical chassis 12 is provided with a pulley gear 18 and a drive gear 21, and the driving force of the motor is a motor pulley 19, a belt 17, and a pulley gear 1.
8. The drive gear 21 is transmitted to convert the tray 10 into an open / close operation.

An intermediate chassis 16 and a traverse 11 for playing a disc are provided in the vicinity of the center of the mechanical chassis 12. The traverse 11 is provided with a turntable portion 11a for rotating the disc and an optical pickup portion 11b for reading information on the disc.

A locking portion 12 is provided on the front surface of the mechanical chassis 12.
a and 12b are provided, and a locking portion 12c is also provided at the rear portion thereof. 12d and 12e are positioning pins,
The shape is such that the upper part is cylindrical and the lower part is formed in a conical shape following the cylindrical shape. In addition, the positioning pins 12d, 12
e is provided near the front surface of the mechanical chassis 12.

Reference numeral 20 denotes a protective cover, which is provided with claw portions 20a and 20b on the front surface thereof, claw portions 20c on the rear portion thereof, and positioning holes 20d and 20e provided on the lower surface of the protective cover 20. There is. Each protective cover 20
Claw portions 20a, 20b, 20c, positioning holes 20d, 2
0e is the locking portions 12a, 12b, 1 of the mechanical chassis 12.
2c and the positioning pins 12d and 12e are engaged. The role of the claw portions 20a, 20b, 20c and the locking portions 12a, 12b, 12c is to fix the protective cover 20 to the mechanical chassis 12, and to position the positioning holes 20d,
The role of 20e and the positioning pins 12d and 12e is to position the protective cover 20 with respect to the mechanical chassis 12.

The attaching / detaching operation of the protective cover 20 constructed as described above will be described below with reference to FIGS.

In FIG. 2, the protective cover 20 has a mechanical chassis 12
FIG. 7 is a cross-sectional view when the device is mounted from above and fixed.
The positioning hole 20e of the protective cover 20 is positioned by entering the positioning pin 12e of the mechanical chassis 12.
Further, the claw portions 20a and 20c of the protective cover 20 once bend outward when mounted on the mechanical chassis 12, and after the locking portions 12a and c of the mechanical chassis 12 are overcome, the deflection returns to the original. Are engaged and fixed by. The clearance A between the claw portion 20c of the protective cover 20 and the intermediate chassis 16 is usually about several millimeters.

Next, when the protective cover 20 is removed from the mechanical chassis 12 at the time of service check such as repair, the claw portion 20c at the rear portion of the protective cover 20 is close to the intermediate chassis 1.
Due to the presence of 6, the engagement of this part will not normally be disengaged unless the intermediate chassis 16 is disengaged, since the fingers do not enter. Therefore, as shown in FIG. 3, the claw portion 20a of the protective cover 20,
At the same time with the claw portion 20b (not shown), the mechanical chassis 1
2 from the locking portions 12a, 12b. At this time, if the protective cover 20 is lifted up, the protective cover 20 becomes rotatable around the rear engaging portion 12c in the arrow A direction.
Moreover, since the tip of the positioning pin 12e contacts the conical portion of the positioning hole 20e of the protective cover 20, it becomes easy to remove the protective pin 20 without hindering the upward rotation of the protective cover 20.

Further, when the protective cover 20 is rotated in the direction of arrow A, as shown in FIG. 4, the positioning pin 12e of the mechanical chassis 12 is moved to the positioning hole 20 of the protective cover 20.
e comes off. Then, the protective cover 20 is moved in the arrow B direction. Then, the claw portion 20c of the protective cover 20 is disengaged from the locking portion 12c of the mechanical chassis 12, and the protective cover 20 can be completely removed from the mechanical chassis 12.

According to this embodiment, the positioning pins 12d and 12e of the mechanical chassis 12 are connected to the front locking portions 12a and 1e.
By providing it near 2b, it is only necessary to first remove the claws 20a and 20b on the front surface of the protective cover 20, and as shown in FIG. 2, another component (in the case of the present embodiment, near the claw 20c of the protective cover 20). Even if there is an intermediate chassis 16), the protective cover 20 can be easily removed from the mechanical chassis 12 without moving this separate part, and the belt 17 inside the protective cover 20, the pulley gear 18, etc. can be easily You can check it.

Further, in this embodiment, the mechanical chassis 1
2 positioning pins 12d, 12e and protective cover 20
Although the positioning holes 20d and e have a conical shape, if the introduction portion of the positioning holes 20d and e of the protective cover 20 is shortened, the same effect can be obtained with a cylindrical pin and hole. It goes without saying that you can do it.

[0022]

As described above, the protective cover device of the present invention is provided with a plurality of locking portions on the front surface and rear portion of the mechanical chassis and two or more positioning pins on the mechanical chassis.
By providing a protective cover that has a claw portion and a hole that respectively engages with these locking portions and positioning pins, and by further providing the positioning pins near the front surface of the mechanical chassis, simply attach from the top of the mechanical chassis during assembly, Since it can be fixed to the mechanical chassis, the parts held in the mechanical chassis can be protected from the user. Also, when removing for service check such as repair,
Even if there is another part in the immediate vicinity of the rear part, by removing the claw part on the front part and rotating around the locking part of the rear part, it disengages from the positioning pin of the mechanical chassis and moves further toward the rear part. By doing so, the claw portion of the protective cover can be removed from the locking portion of the rear surface portion of the mechanical chassis, and as a result, the protective cover can be easily removed from the mechanical chassis.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a loading mechanism body according to an embodiment of the present invention.

FIG. 2 is a sectional view of a loading mechanism main body according to an embodiment of the present invention.

FIG. 3 is a sectional view of a loading mechanism body according to an embodiment of the present invention.

FIG. 4 is a sectional view of a loading mechanism main body according to an embodiment of the present invention.

FIG. 5 is an external perspective view showing a part of a conventional CD player as seen through.

FIG. 6 is a perspective view of a conventional loading mechanism body.

[Explanation of symbols]

 1 Loading Mechanism Main Body 10 Tray 11 Traverse 12 Mechanical Chassis 12a, 12b, 12c Locking Part 12d, 12e Positioning Pin 13 Clamp Plate 15 Clamper 16 Intermediate Chassis 17 Belt 18 Pulley Gear 19 Motor Pulley 20 Protective Covers 20a, 20b, 20c Claws 20d, 20e Positioning hole 21 Drive gear

Claims (2)

[Claims] 1. A protective cover device in which a protective cover is attached to a mechanical chassis provided with drive transmission means such as gears, and a plurality of locking portions are provided on a front surface portion and a rear portion of the mechanical chassis and a mechanical cover is provided. Two or more positioning pins are provided near the front part of the chassis, while the protective cover is provided with a claw part and a positioning hole that engage with the locking part and the positioning pin, respectively. It can be fixed simply by removing it by removing the claw part on the front part and rotating around the locking part of the rear part when removing it from the positioning pin of the mechanical chassis,
The protective cover device is characterized in that the claw portion is configured to be disengaged from the locking portion of the rear portion by further moving it toward the rear portion. 2. A positioning pin of a mechanical chassis provided with a drive transmission means such as a gear is formed in a cylindrical shape in an upper part and a conical shape continuing to the cylindrical part in a lower part, and the positioning hole on the protective cover side is positioned as described above. The protective cover device according to claim 1, wherein the protective cover device is formed in a hole shape that engages with the pin.