JPS5856297Y2 - lock mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a locking mechanism for a door of a device, etc., and more particularly to an improved locking mechanism that can be unlocked with a coin or the like.

For example, communication equipment and various devices installed in offices, computer rooms, etc. can be easily accessed by unspecified persons, but the doors are usually closed to prevent unauthorized access. be.

For such locks that require a specific key to unlock, storing the key is troublesome, and the door cannot be opened in an emergency or if you do not have the key with you and inspection or repair of the interior is required. There is a problem that it cannot be done.

Therefore, it is desired that the door cannot be opened easily by someone else, and that the person concerned can open the door without requiring a special key, tool, or the like.

For this reason, a locking mechanism that can be unlocked using a coin has been proposed.

The above-mentioned conventional locking mechanism is shown in FIGS. 1 to 4 and will be explained. A door that can be opened in the direction of arrow A is pivoted on the main body 11 of the equipment housing 1 shown in FIG. 1 by a hinge or the like (not shown). 12 is provided with a coin insertion hole 13 on the other side, and inside the coin insertion hole 13, leaf springs 14 as shown in FIG. It is pressed and energized.

Further, an L-shaped metal fitting 16 having a hole 15 in the main body 11 is fixedly installed in the hole 13 as shown in FIG. Finished metal fittings 1
9 is provided, a hook 18 engages with the hole 13, and the bottom of one L fitting covers the hole 13.

When the coin 20 is inserted into the coin insertion hole 13 as shown by arrow B and pushed in, the bottom of the L fitting 19 is pressed and the leaf spring 17 is pressed.
is elastically deformed (arrow C), and as shown in Fig. 4, the hook 18
The engagement with the hole 15 is released.

This causes the upper and lower leaf springs 14 to open the door 12.

When closing the door, remove the coin 20, and when the door is closed, the tip of the L-shaped fitting 16 and the tip of the hook portion 18 come into contact, and the L-shaped fitting 19 tilts along the slope, and the hook 18 aligns with the hole 15. When the leaf spring 17 returns elastically, it is engaged and locked in the state shown in FIG.

In the conventional locking mechanism described above, since there is no guide for the coin in the state shown in FIG. 4, the coin tilts to the left and right, making it difficult to operate.

Also, the paint around the coin insertion hole on the door may get scratched and peel off.

In addition, there were various other problems such as the leaf spring attached to the main body being deformed by some force, making restoration work difficult.

The present invention was devised in view of the above-mentioned problems, and it is an object of the present invention to provide an improved locking mechanism that eliminates these problems.

Next, embodiments of the present invention will be described in detail below with reference to the drawings.

Figures 5 to 8 show an embodiment of the locking mechanism of the present invention.
The figure shows a sectional view of the plan view of the sixth same pressure surface view, and FIG. 7 shows the side view of FIG. 5 as a sectional view.

When the main body 11 of the case and the door 12, which have the same structure as shown in FIG. Slope 22.22'
A locking metal fitting 23 formed on the door 12 is fixed thereto, and a coin insertion hole 25 is opened in the center front of a supporting metal fitting 24 fixed on the inner surface of the corresponding door 12 side, and a pair of hook levers 26. 27 are rotatably supported by an intermediate shaft 28.29, one front end has a V-shaped ramp 30.31 and the other rear end has an inclined surface 32.33 pointing outwards from each other. A hook portion 34° 35 is provided, and the hole 2 of the locking metal fitting 23 is
It engages with the upper and lower edges of 1.

The hook lever 26.27 has a hook portion 34.35 and a shaft 28.29.
A compression coil spring 36 is fitted in the middle of the support fitting 23 to bias it upward and downward, but it expands with a certain margin due to the inner wall surface of the hole 37 of the support fitting 23 (as shown by the arrow in Fig. 8, D).
') are restricted.

The periphery of the hole 25 protrudes in the shape of a frame 38 and fits into the hole of the door 12, making it easy to insert coins (to be described later) and protecting the door.

Leg pins 39.40 are housed above and below the hole 37 of the support fitting 24, and are compressed and biased by a compression spring 43.44 inserted into an internal cylinder 41.42.

One end of this leg pin 43, 44 is in contact with the front surface of the locking metal fitting 23 attached to the front surface of the main body 11, and the inner edge of the square hole 21 of the locking metal fitting 23 is engaged as shown in FIG. and hook lever 2
6. It ensures that the hooks 34 and 35 of 27 are engaged with each other, and urges the door 12 in the opening direction.

With the above configuration, as shown in FIG. 7, a suitable coin 3 is inserted into the coin insertion hole 25 and pushed in (arrow E).

The coin 3 is attached to the V-shaped slope 30. at the front end of the hook lever 26.27.
31, and expands it vertically around axes 28 and 29 due to the wedge effect.

As a result, the hook portions 34 and 35 at the rear end are rotated in the approaching direction as shown by arrows F and F', and are disengaged from the locking metal fitting 23.

Spring 36 is further compressed. Along with this, leg pin 3
The door 12 is opened slightly by the repulsive force of the spring 43,44 which is compressed by 9,40.

In other words, since the lock is unlocked, take out the coin.

This state is as shown in FIG.

In order to close and lock the door after opening the door 12 and completing the operation/inspection inside the device, press the door 12 firmly against the main body 11, and press the leg pins 39, 40 and the spring 43. While compressing .44, on the other hand, the inclined surface 22.22' of the locking fitting 23 and the inclined surface 32 of the hook lever 26.27,
33 slides into contact with each other, compressing the spring 36 and F.

When the hooks 34 and 35 reach the back surface of the hole 21 by rotating in the direction F', the hooks are rotated outward by the spring 36 and engaged with each other.

In other words, it is locked in the state shown in FIG.

In the present invention, the locking metal fitting 23 is provided in the above embodiment, but a hole may be directly formed in the front side wall of the main body 11, and a locking mechanism may be provided at a position corresponding to the hole.

In addition, for convenience, any coin was used as the unlocking means, but it is also possible to specify a specific type of coin depending on the size of the hole and the V-shaped slope of the hook lever, even if it is an item similar to a coin. good.

Furthermore, the tip of the yarn piece or the like may be formed into an arc, a V shape, or a wedge shape, and such things are also included in the scope of the present invention.

It goes without saying that the hole of the locking and retaining portion can also be modified and applied as appropriate, such as a recessed hole, a snot, or a groove.

As described above, compared to the conventional locking mechanism, the locking mechanism of the present invention is free from damage near the insertion hole of the door due to coins, and since the spring for opening the door is not exposed, there is no risk of deformation of the spring.

Further, by integrating these components, stability and ease of assembly are improved, which is a great practical effect.

[Brief explanation of drawings]

Figure 1 shows a housing equipped with a conventional locking mechanism, Figure 2 is a side view of a leaf spring for opening the door, and Figure 3 shows a cross-sectional view of the locking mechanism in Figure 1, and the door is locked. Fig. 4 is an explanatory diagram of the unlocking process, Fig. 5 to Fig. 8 are examples of the locking mechanism according to the present invention, Fig. 6 is a front view, and Fig. 5 is a plan view of Fig. 6. Figure 7 is a side view of Figure 6 and a sectional view of the plane passing through the coin insertion hole;
FIG. 8 is a perspective view of only the locking mechanism in an unlocked state. In the figure, 11 is the housing body, 12 is the door, 2 is the lock mechanism, 3 is the coin, 21 is the hole, 23 is the locking metal fitting, 24 is the support metal fitting, 25
26.27 is a coin insertion hole, 26.27 is a hook lever, 28 and 29 are shafts, 34.35 is a hook portion, 36 is a spring, 39.40 is a leg pin, and 43.44 is a spring.

Claims (1)

[Scope of utility model registration request] A locking mechanism for a door, one of which is pivotally supported by a main body and is rotatable, wherein a pair of hook levers each having a hook portion inserted into the door side and engaged through a front hole on the main body side are elastically attached. The door has a coin insertion hole in the front surface thereof, and is pivoted so that one end is pressed and expanded by a coin inserted into the hole and the hook portion of the other end is separated from and approached by the main body. A locking mechanism comprising a pressing means for elastically pressing the door in the opening direction with respect to the main body when the hook portion and the main body are engaged.