JPS6319979Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is applicable to, for example, a video tape recorder (VTR).
Regarding a chassis fixing mechanism suitable for fixing a sub-chassis in which a circuit board is housed and fixed to a main chassis, it is possible to easily confirm the name of the board and to take out the board even when the installation format is changed. It was made in a similar manner.

Conventionally, for example, in a VTR, mechanical parts such as drums and reels are directly fixed to the main chassis, but a sub-chassis is provided separately from the main chassis, and this sub-chassis houses servo circuits, drive circuits, system control circuits, etc. A system has been proposed in which boards on which boards are arranged separately are housed and fixed. The reason for doing this is that, for example, in the event of a circuit failure, the circuit board on which the circuit considered to be affected is disposed can be replaced with the entire board to immediately restore its function. Therefore, it is particularly applied to broadcast VTRs that require urgent restoration of their functions.

This sub-chassis is constructed, for example, as shown in FIG. 1, and is fixed to the main chassis.

In FIG. 1, reference numeral 1 designates the above-mentioned sub-chassis, and a board 2 on which a servo circuit, a drive circuit, a system control circuit, etc. of a VTR are separately arranged is housed and fixed in this sub-chassis 1. Generally, on the front part 2a of the board 2, a name indicating which circuit is arranged on the board 2 is written, for example, "servo circuit".

This sub-chassis 1 is fixed to main chassis 3 arranged on both sides thereof using screws 4 or the like. In this case, the sub-chassis 1 is fixed in such a position that its bottom surface 1a is parallel to the bottom 3a of the main chassis 3.

Further, in FIG. 1, reference numeral 5 indicates mechanical parts such as a drum part and a reel of the VTR, and this mechanical part 5 is directly fixed to the main body chassis 3.

Let us consider a case in which a VTR with the sub-chassis 1 fixed to the main chassis 3 in this manner is used by placing it on, for example, a desk 6 whose surface is horizontal as shown in FIG. In this case, the bottom surface 1 of the sub chassis 1
Since a is parallel to the top of the desk 6 and is horizontal, the bottom portion 2b of the board 2 stored and fixed in the sub-chassis 1 is placed in a horizontal state. Therefore, the board 2 written on the front part 2a of this board 2
The name is relatively easy to confirm. Further, the taking-out direction X is also horizontal, and the taking-out operation can be easily performed.

Next, since it is easy to move, it may be used by being fixed to a cart 7 (the caster portion is omitted in FIG. 2) as shown in FIG. In this case, the front portion 3b of the main body chassis 3 is generally fixed so as to be vertical. Therefore, the bottom surface 1a of the sub-chassis 1 is tilted by a predetermined angle θ from the horizontal direction, and the bottom portion 2b of the substrate 2 housed in the sub-chassis 1 is also tilted from the horizontal by a predetermined angle θ. Therefore, in this case, the front part 2a of this substrate 2 is also θ from the vertical direction.
The lower it is placed based on the eyes, the more difficult it is to confirm the name written on the front part 2a. Moreover, since the direction X of taking out the substrate 2 is also below the horizontal direction by θ, taking out the substrate 2 becomes extremely difficult. After all, if it is installed on the trolley 7 in this way, when there is an emergency to replace the board 2 due to a circuit failure, etc.
There is an inconvenience that time is wasted for the replacement.

The reason why the above-mentioned inconvenience occurs when the installation form is changed in this way is considered to be because the sub chassis 1 is fixed at a fixed position with respect to the main chassis 3.

In view of this, the present invention proposes a chassis fixing mechanism that allows for easy removal of the board stored and fixed in the sub-chassis and confirmation of the name of the board even if the installation configuration changes. .

Hereinafter, an embodiment of the chassis fixing mechanism according to the present invention will be described with reference to FIGS. 3 and 4. In FIGS. 3 and 4, parts corresponding to those in FIG. 1 are designated by the same reference numerals, and detailed explanation thereof will be omitted.

In this example, first, second and third round holes 17a, 17b and 17 are formed on the side surface of the sub chassis 1.
c is formed. In this case, the first and second round holes 1
7a and 17b are formed vertically side by side on the front side of the side surface 1b, and the third round hole 17c is formed on the rear side of the side surface 1b.

On the other hand, the main body chassis 3 has round holes 18a,
18c ₁ and 18c ₂ and a long hole 18b are formed.
In this case, when the round holes 18a and 18c ₁ are brought into contact with the side surface 1b of the sub-chassis 1 against the main chassis 3 and the bottom surface 1a of the sub-chassis 1 is parallel to the bottom 3a of the main chassis 3 (state A), A round hole 17 provided in the side surface 1b of this sub-chassis 1
They are formed at positions corresponding to a and 17c. The elongated hole 18b is a round hole 17 provided in the side surface 1b of the sub chassis 1 when the side surface 1b of the sub chassis 1 is brought into contact with the main chassis 3 in state A.
The starting end 18b ₁ is formed at a position corresponding to b,
It is formed over an angular range of a predetermined angle θ with the opening 18a as the center of curvature. Further, the round hole 18c ₂ is changed from the above-mentioned state A to the round hole 17a.
is rotated by a predetermined angle θ using the round hole 17b as a fulcrum.
is located at a position corresponding to the terminal end 18b ₂ of the elongated hole 18b formed in the main body chassis 3, the round hole 17c
is formed at a position corresponding to

Here, the round holes 17a, 17b, and 17c formed in the side surface 1b of the sub chassis 1 are made to correspond to the starting ends 18b 1 and round holes 18c ₁ of the round hole 18a, the long hole 18b, and the round hole 18c ₁ formed in the main chassis 3, respectively. By fixing using screws 19a, 19b and 19c, respectively, the sub-chassis 1 is fixed in a state as shown in FIG. 5, that is, in a state in which the bottom surface 1a of the sub-chassis 1 is parallel to the bottom 3a of the main chassis 3 (state A).

Therefore, as shown in FIG. 5, when using it on a desk 6 whose surface is horizontal, for example,
The sub chassis 1 may be fixed to the main chassis 3 in such state A. In this case, sub chassis 1
Since the bottom surface 1a of is parallel to the top of the desk 6 and is horizontal,
The bottom portion 2b of the substrate 2 housed and fixed within the sub-chassis 1 is placed in a horizontal state. Therefore, the name of the board 2 written on the front part 2a of the board 2 is relatively easy to confirm as in the conventional case. Moreover,
The take-out direction X is also horizontal, and the take-out operation is easy.

Next, the round holes 17a, 17b and 17c formed in the side surface 1b of the sub chassis 1 are made to correspond to the round hole 18a formed in the main chassis 3, the terminal end 18b ₂ of the elongated hole 18b and the round hole 18c ₂ , respectively, If fixed using screws 19a, 19b and 19c, respectively,
The sub chassis 1 is fixed in a state as shown in FIG. 6, that is, in a state in which the front surface 1c of the sub chassis 1 is parallel to the front portion 3b of the main chassis 3 (state B).

Therefore, when the sub-chassis 1 is used while being fixed to the truck 7, it is sufficient to fix the sub-chassis 1 to the main chassis 3 in the B state as shown in FIG. In this case, unlike the conventional one, the bottom surface 1a of the sub chassis 1 is horizontal, so in this case as well,
The bottom part 2b of the board 2 housed and fixed in the sub-chassis 1 is placed in a horizontal state. Therefore, the board 2 written on the front part 2a of this board 2
The name will be easier to confirm than the previous one. Furthermore, the take-out direction X is also horizontal, making the take-out work easier than in the conventional case.

As described above, according to the chassis fixing mechanism according to the present invention, the fixing position of the sub-chassis 1 to the main chassis 3 can be changed arbitrarily depending on the installation form, so that it can be stored and fixed to the sub-chassis 1 regardless of the installation form. It is possible to easily confirm the name of the printed board 2 and to take out the board 2.
Further, since the sub-chassis 1 is fixed to the main chassis 3 at three points, and the weight of the sub-chassis 1 is distributed and applied to the three points of the main chassis 3, there is an advantage that the durability and attachment stability of the chassis are increased.

In addition, in the above embodiment, the main body chassis 3
The elongated hole 18b formed in is formed within a predetermined angle θ with the round hole 18a as the center of curvature, but if the angular range of the elongated hole 18b is made wider,
It will be obvious that the fixing position of the sub-chassis 1 relative to the main chassis 3 can be selected from a wide range.

Further, in the above embodiment, the sub chassis 1
A round hole 17b is formed in the side surface 1b of the sub-chassis 1, and a long hole 18b is formed in the main body chassis 3. Conversely, a long hole 17b is formed in the side surface 1b of the sub-chassis 1. A round hole may be formed in 3.

Further, the present invention is not limited to the above-described embodiments, and it goes without saying that various other configurations may be adopted without departing from the gist of the present invention.

[Brief explanation of drawings]

1 and 2 are diagrams for explaining a conventional chassis fixing mechanism, FIG. 3 is a perspective view showing an embodiment of the chassis fixing mechanism according to the present invention, and FIG. 4 is a schematic diagram of the example shown in FIG. Exploded perspective view of the section, Figures 5 and 6
Each figure is a diagram for explaining the example in FIG. 4. 1 is a sub chassis, 2 is a substrate, 3 is a main body chassis, 17a, 17b and 18a are round holes, 18
b is a long hole, and 19a and 19b are screws, respectively.

Claims (1)

[Scope of utility model registration request] It has a sub-chassis in which a circuit board is housed and fixed, and a main body chassis located on both sides of the sub-chassis, on which the sub-chassis is rotatably supported, and either the sub-chassis or the main chassis has a rotatable shaft. A long hole for position adjustment and a plurality of round holes or a single round hole for fixing the sub-chassis at the position determined by the long hole, and one of the round holes corresponds to the long hole for position adjustment. and a single round hole or a plurality of round holes corresponding to the plurality of round holes or the single round hole, and the sub-chassis can be fixed at a corner position determined by the plurality of round holes. Fixed mechanism.