JPH0241887Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field of the invention This invention relates to an opening/closing mechanism for a cover that protects the front surface of an operation panel of an electronic device or the like.

(b) Prior art and problems First, a block diagram of the prior art is shown in Fig. 6.

In FIG. 6, 7 is the main body, 8 is a cover, 11 and 12 are blocks, and 13 is a rotating shaft.

Block 11 is fixed to main body 7, and cover 8 is attached to block 12.

FIG. 6 is a diagram showing the state in which the front surface of the main body 7 is covered with the cover 8.

Next, FIG. 7 shows a top view of only the blocks 11 and 12 in FIG. 6.

As is clear from FIG. 7, block 11 has a concave surface, and block 12 has a convex surface. A rotary shaft 13 is attached so as to pass through the blocks 11 and 12, with the convex surface of the block 12 inserted into the concave surface of the block 11, and holds the block 12 in a freely rotatable manner.

Next, FIG. 8 shows a state diagram in which the cover 8 of FIG. 6 is opened.

FIG. 8 is a diagram showing the state in which the block 12 is lifted above the main body 7 around the rotating shaft 13 so that the front panel of the main body 7 can be operated.

However, in the state shown in Fig. 8, the cover 8 may fall under its own weight, causing damage to the main body 7.
The cover 8 may be damaged.

(c) Purpose of the invention The purpose of this invention is to provide a mechanism that prevents the cover 8 from falling down in the state shown in FIG.

(d) Example of the invention Next, a block diagram of an example of the invention is shown in FIG. 1.

1 and 2 in Figure 1 are blocks, 4 and 5 are pins, and 8
is a spring.

The block 1 has a concave surface 1A, which fixes the lower part 1C of the block 1 to the main body 7.

The block 2 has a convex surface 2A, and a cover 8 is attached to the block 2.

A pin 4 is attached to the lower 1C side of the side surface 1B of the block 1, a pin 5 is attached to the center of the front section 2C of the block 2 on the side surface 2B of the block 2, and a spring 6 is attached between the pin 4 and the pin 5.

Next, the relationship diagram between block 1 and block 2 is shown in the second diagram.
As shown in the figure.

3 in Fig. 2 is the rotation axis, and the rotation axis 3 is the convex surface 2.
A is inserted into the concave surface 1A, and is attached so as to pass through blocks 1 and 2, so that block 2 is rotatably held relative to block 1.

Next, FIG. 3 shows a state diagram in which block 2 of FIG. 1 is opened.

FIG. 3 shows a state in which the block 2 rotates around the rotating shaft 3, and the block 2 in FIG. 1 is rotated by 90 degrees. The spring 6 in FIG. 1 and the spring 6 in FIG. 3 have approximately the same length, as will be described later.

Next, FIG. 4 shows an explanatory diagram of the state of the spring 6 according to this invention.

9A in FIG. 4 is the locus of the pin 5, and 9B is the locus of the rotated spring 6.

Locus 9A is indicated by a dashed line, and locus 9B
is indicated by a two-dot chain line.

The actual tip of the spring 6 moves along the trajectory 9A,
The difference 9C between the locus 9A and the locus 9B is the extension of the spring 6. Therefore, the spring 6 is stretched in the center of FIG. 4, but is contracted at the end positions 9D and 9E, indicating that the spring 6 is in a stable state at the end positions 9D and 9E.

Position 9D is the state shown in FIG. 1, and position 9E is the state shown in FIG.

Therefore, the state shown in FIG. 1 or 3 will be maintained unless an external force is applied.

Next, a block diagram of an embodiment according to this invention is shown in FIG.

FIG. 5 is a state diagram with the cover 8 open,
This corresponds to FIG. 8 according to the prior art.

In FIG. 5, since the spring 6 is in the position 9E of FIG. 4, the block 2 is held in the state shown in FIG. 5 unless an external force is applied. Therefore, the cover 8 attached to the block 2 continues to be held open.

(e) Effects of the invention According to this invention, the first block and the second block are connected by a spring, and the second block is held with Figs. 1 and 3 in a stable state, so that it is difficult to open the cover. This will prevent the cover from falling even when the cover is closed.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of an embodiment according to this invention, Figure 2
The diagram is a relationship diagram between block 1 and block 2 in Figure 1,
3 is a state diagram of the block 2 shown in FIG. 1 in an open state, FIG. 4 is an explanatory state diagram of the spring 6 according to this invention,
6 is a block diagram of the embodiment according to this invention, FIG. 6 is a block diagram of the prior art, FIG. 7 is a top view of only the blocks 11 and 12 in FIG. 6, and FIG. 8 is a cover 8 of FIG. 6. FIG. 1...Block, 1A...Concave, 1B...Side, 1C...Bottom, 2...Block, 2A...Convex, 2B...Side, 2C...Front, 3...Rotary axis, 4... Pin, 5...Pin, 6...Spring, 7...
...Body, 8...Cover, 9A...Trajectory, 9B...
Trajectory, 9C...Difference, 9D...Position, 9E...Position.

Claims (1)

[Claims for Utility Model Registration] A first block 1 having a concave surface 1A and a lower part 1C fixed to the main body 7, a second block 2 having a convex surface 2A and having a cover 8 attached thereto, and a convex surface 2A connected to the concave surface 1A. In the state that it is inserted into
A rotary shaft 3 that rotatably holds A, a first pin 4 attached to the lower part 1C side of the rotary shaft 3 on the side surface 1B of the first block 1, and a second pin 4 on the side surface 2B of the second block 2. A cover opening/closing mechanism comprising: a second pin 5 attached to the center of the front portion 2C of the block 2; and a spring 6 attached between the first pin 4 and the second pin 5.