JPS5838843Y2 - door lock mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a locking mechanism for a door in an electronic device such as a computer.

Generally, a push button type locking mechanism of a device case is automatically locked when the door is closed, and is unlocked when the push button of the locking mechanism is pushed with a fingertip.

For this reason, anyone can easily remove the lock and open the door, or the operation button may be pressed with careless force and the door may remain open without your knowledge.

Therefore, it is not sufficient as a door locking mechanism for a housing housing a precision device, and on the other hand, if a key is attached, only a limited number of people can open and close the door, which is inconvenient.

Therefore, in some countries and some users, there is a demand for a mechanism in which the lock cannot be unlocked with just a finger, but can only be unlocked by inserting a coin, the head of a ballpoint pen, or the like.

On the other hand, some countries have decided that a conventional mechanism in which the push button can be operated with a finger is acceptable.

The present invention provides a locking mechanism that can satisfy all of these diverse requirements.According to the present invention, a single shielding plate can be used without significantly modifying the conventional locking mechanism. You can easily meet each request by simply attaching and detaching.

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of the entire locking mechanism showing a type in which the lock button is operated with a finger, Fig. 2 is a longitudinal sectional view of the same type, and Fig. 3 is a coin-operated locking mechanism. FIG. 3 is a perspective view of a main part showing a format in which an operation button is operated with the head of a ballpoint pen or the like.

Reference numeral 1 designates a door, which can be closed by engaging locking claws 2, 2' of a locking mechanism provided inside the upper end of the door with locking holes 5, 5' of a locking plate 4 fixed to the housing 3. is locked in the same position.

The lock claws 2, 2' are fixed to a slide shaft 6, and the slide shaft 6 is supported vertically movably on guide plates 7, 7' fixed to the inner wall of the door, and is supported by a wound coil spring 8. It is constantly being pushed upwards.

A plate 10 fixed to the back of the slide shaft 6 is attached to the slide shaft 6.
This is a rotation prevention plate that moves up and down along with the shaft while being guided by the inner wall of the door.

An operation button 9 is fixed to the upper end of the slide shaft 6, and a stopper plate 11 is fixed to the inner wall at the upper end of the door.

When the shaft 6 is pushed up by the coil spring 8,
The lower side plate 91 of the push button contacts the lower surface of the stopper plate 11, and the operating surface 92 of the push button is aligned with the upper end surface 1' of the door.

When the push button 9 is pressed down in the direction of the arrow with a fingertip, the lower surface of the operating surface 92 of the push button hits the upper surface of the stopper 11.

One end of the door 1 is pivotally supported on the housing 3 side as usual.

Now, when the door 1 is closed, the sloped part of the upper end of the lock claws 2, 2' hits the lock plate 4, so the lock claws 2, 2', the slide shaft 6, and the push button 9 are pressed against the coil spring 8. When the locking claws 2, 2' are fitted into the locking holes 5, 5', the door 1 is raised and returned to its original position by the force of the coil spring 8, and the door 1 is locked to the housing.

To release the lock, press down on the push button 9 with your fingertip, and the lock claw 2.2' will come out of the lock hole 5, 5'.
The door can be opened.

In the case of this invention, there are screw holes 12 on both sides of the push button on the top surface 1' of the door.
．． 13, and the push button 9 is formed with a slit 93 or a groove formed by pressing.

Then, as shown in FIG. 3, a shielding plate 14 is placed over the push button 9 and fixed to the screw holes 12.13 of the door with screws 15.16.

The shielding plate 14 has a slit 17 of approximately the same size and a circular hole 18 that is large enough to fit the head of a ballpoint pen, just above the slit 93 of the push button.

In this case, the push button 9 cannot be operated directly with a finger as shown in FIG. 1, but a coin 19 is inserted through the slit 17 of the shield plate and pressed down as shown in the figure.

Then, the push button 9 is pressed down with the coin 19, the lock claws 2, 2' escape from the lock holes 5, 5' on the housing side, and the lock is released.

Similarly, the lock can also be released by inserting the head of a ballpoint pen, pencil, etc. through the circular hole 18 in the shielding plate and pressing down on the push button 9.

In the illustrated example, both coins and ballpoint pens can be operated, but it is also possible to provide only either the slit 17 or the circular hole 18 so that the coin can be used exclusively for ballpoint pens.

Of course, the shielding plate may have holes through which only more special items other than coils and ballpoint pens can pass.

Figures 4 and 5 show other embodiments of the present invention.
The figure is a perspective view with the shield plate removed, FIG.

In this case, a U-shaped body 21 is formed of a plate material or the like, one side 14' of which constitutes a shielding plate, and a slit 17 and a circular hole 18 are formed.

On the other hand, the push button 92' is made of a single rectangular plate and is fixed to the upper end of the shaft 6.

To install the U-shaped body 21, insert the U-shaped body 2 from the inside of the door.
1 is placed over the push button 92' and the stopper plate 11, and the other side (lower side) 22 of the U-shaped body is fixed to the lower surface of the stopper plate 11 with a screw 23.

In this example, the upper surface of the shielding plate 14' and the upper end surface 1' of the door are aligned.

As described above, according to the present invention, in a finger-operated push-button locking mechanism, a shielding plate is placed over the pushbutton and fixed to the door, and only special items such as coins or ballpoint pens are placed on the shielding plate. Open a window hole through which it can pass.

Therefore, in order to open the door, a special item such as a coin or a ballpoint pen must be inserted through the window hole, and it is not possible for anyone to release the lock by freely pressing the push button with their finger as in the past.

Furthermore, there is no need to worry about the push button being pushed and unlocked by an inadvertent external force.

In particular, if you leave the shielding plate uncovered, anyone can easily operate it with their fingertips as before, but on the other hand, depending on the user and importer, just cover and fix one shielding plate with a designated window hole.
It can only be unlocked by a person associated with the device with a special item.

Therefore, without modifying the conventional push button type lock mechanism, it can be used also as a so-called simple key type lock mechanism that can be unlocked using various operating tools around you.

Therefore, it is possible to meet various demands without increasing costs, and is extremely effective in managing built-in devices.

Moreover, if the shielding plate is made in a color that makes it easy to see, even if the locking mechanism is at the same height as a person or at the bottom of the device, the locking position can be easily found, even though it is a simple set of keys. , it does not become difficult to find the insertion position of the operating tool.

[Brief explanation of drawings]

The drawings show an embodiment of the door locking mechanism according to the present invention. Fig. 1 is a perspective view of a finger-operated locking mechanism, Fig. 2 is a longitudinal sectional view of the same locking mechanism, and Fig. 3 is a simple key lock. FIG. 3 is a perspective view of the main parts of the mechanism. 4 and 5 show other embodiments of the present invention,
FIG. 4 is a perspective view with the shield plate removed, FIG. In the figure, 1 is the door, 2, 2' are lock claws, 5, 5' are lock holes, 9.92' are operation buttons, 14.14' are shielding plates, 21 is a U-shaped body, 17 is a slit, 18 is a circular hole.

Claims (2)

[Scope of utility model registration request] (1) Door locking mechanism that is operated by pressing with a finger A shielding plate is placed on the outside of the operating button and fixed to the door so that the operating button cannot be operated directly with a finger, and the shielding plate does not allow fingers to pass through. A door locking mechanism characterized by having a window hole through which a small cross-sectional item that is around us can pass through to reach an operation button. (2) Practical use characterized in that one side of the U-shaped cross-sectional body constitutes a shielding plate, and the U-shaped cross-sectional body is attached and fixed from the inside of the door so that the shielding plate part covers the operation button. A door locking mechanism according to claim (1) of patent registration.