JPH0216487Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a removal tool for removing a keytop cover that is press-fitted into a main body, such as a keyboard of a desktop computer.

[Prior art and its problems]

For example, as shown in Figure 1, the input keyboard used in desktop electronic computers has number keys 0 to 9, operation keys such as + and -, and symbol keys 12 from A to Z. It is implemented in the computer itself. In this case, in order to increase the packing density of the keys, the keys are arranged very close to each other, and there is only a very narrow gap between the key tops and covers. Therefore, if you try to pull the keytop cover out of such a keyboard,
If you try to pull out the key top cover with your fingers, your work efficiency will be extremely poor.

In order to solve this problem, the key top cover has traditionally been pulled out using a suitable jig. Specifically, this type of jig has a shape in which two elastic wires are formed into a substantially U-shape and are attached to a jig body substantially parallel to each other. When using, please refer to 2.
The tip of the U-shaped elastic wire of the book, that is, the curved part at the bottom of the U-shape (hereinafter referred to as the hook part), is placed between the key top cover on both sides of the book and the key top cover next to it. Slide them in each. Since the base portion of the key top cover is thinner than the top surface portion, the key top cover can be pulled out from the main body by engaging the hook portion with this portion and pulling upward. This type of jig is described in detail in, for example, the specification of Japanese Utility Model Application No. 50-90165.

However, if you use such a jig to pull out the key top cover from the keyboard body,
When you pull it out, the key top cover often comes off the jig and flies off somewhere due to excess force. In other words, while you are trying to pull out the keytop cover with this jig, you must pull the keytop cover back downward against the upward force from the hook that tries to pull out the keytop cover. The keytop cover does not come off the jig because there is a force (frictional force between the keytop cover and the keyboard body, etc.) that tends to cause the keytop cover to move. However, the moment the key top cover comes off, the force that pulls it back down disappears, and the key top cover is forced upward by the recoil. There is nothing in the jig made of U-shaped elastic wire to stop the key top cover from moving, so the key top cover gains momentum and flies off the jig and ends up flying somewhere.

[The problem that the idea attempts to solve]

The problem of the present invention is to solve the above-mentioned problems of the prior art, and to add a member to the jig to hold down the keytop cover from above during the keytop cover removal operation. The purpose is to prevent the cover from flying off somewhere.

[Structure and action of the idea]

In order to achieve the above-mentioned problems, the key top cover removal tool of the present invention includes a removal tool main body,
They are made of elastic wire and have a U-shape, and are attached to the removal tool body at predetermined intervals and approximately parallel to each other.
A pair of locking tools are attached so that the bent portion of the U-shape becomes a free end, and a spring is inserted into the removal tool body so as to be able to enter and exit the removal tool body. It has a pressing rod that applies a pressing force toward the bent portion.

As a result, the key top cover is pulled out while being held between the U-shaped bent part and the pressing rod, so even when the key top cover is pulled out, the pressing rod presses it from above, so that the key top cover is held down from above.
The cover remains stuck in this key top cover removal tool. Therefore, there is no chance that the key top cover will fly away and get lost.

[Example of idea]

The present invention will be explained in detail below based on the drawings.

FIG. 2A is a perspective view of a removal tool 20 according to an embodiment of the present invention, and FIG. 2B is a partially sectional view thereof.

In the figure, reference numerals 21 and 23 denote a pair of U-shaped locking tools made of piano wire, one end of which is fixed to the removal tool main body 27.

Reference numeral 25 designates a key top cover pressing rod located in the middle of the pair of locking tools 21 and 23. This pressing rod 25 can move in and out in the direction of arrow a in FIG. 2A. That is, as shown in FIG. 2B, the pressing rod 25 is pushed out from the removal tool body 27 by the spring 28 inserted into the removal tool main body 27, and the bending portion which is the free end of the distal end of the locking tools 21 and 23 is pushed out from the removal tool main body 27. (hereinafter referred to as a hook portion) is biased by a spring. Further, when the lever 22 is pulled up toward the handle 29, the press bar 25 is pulled back into the removal tool main body 27 against the elasticity of the spring 28 via the support member 24 fixed to the press bar 25.

The handle 29 is fixed to the removal tool main body 27 with screws 26.

3A to 3E are a front view and a side view showing how the removal tool 20 shown in FIG. 2A is used.

The illustrated keytop cover 12 is generally trapezoidal, and a protrusion (not shown) of the main body is press-fitted into a hole (not shown) provided in the lower surface of the keytop cover 12. Also,
The distance A between the pair of fasteners 21 and 23 is equal to or slightly narrower than the width B of the upper surface of the keytop cover 12, as shown in the side view of FIG. 3A. Note that the width of the locking tools 21 and 23 is the same as the key top.
It is sufficient to make the width slightly wider than the width C of the lower surface of the cover 12.

Next, when the removal tool 20 is pushed down in the direction of arrow m, the hooks of the locking tools 21 and 23 are securely pulled onto the lower surface of the keytop cover 12, as shown in the front views of FIGS. 3B and 3C. On the other hand, the pressing rod 25 lightly presses the central upper surface portion of the key top cover 12 by the spring 28.

Here, as shown in the side view of FIG. 3D, the removal tool 20 is pulled up in the direction of arrow n with the hook portions of the pair of locking tools 21 and 23 securely engaged with the lower surface of the key top cover 12. Then, the key top cover 12 can be easily pulled out from the main body.

To remove the key top cover 12 from the removal tool 20, the push rod 25 can be lifted in the direction of arrow n' using the lever 22, as shown in the front view of FIG. 3E.

In the above-described embodiment, when removing the key top cover 12 from the removal tool 20, the lever 22 is used to slightly lift the push rod 25, but instead, the spring pressure of the spring 28 is adjusted and the lever 22 is lifted up.
Of course, it is also possible to easily remove the key top cover by hand without having to pull it up.

[Effect of idea]

As explained in detail above, according to the present invention,
While the key top cover is being pulled out from its attached state, it is kept completely clamped from above and below by the hook part of the locking tool and the press bar, so that the key top cover that has been pulled out will be left behind and will fall somewhere. You won't have to fly to another place and get stuck. This has the great effect of improving workability.

[Brief explanation of drawings]

FIG. 1 is a plan view of a general desktop electronic computer, FIGS. 2A and 2B are a perspective view and a partial sectional view of a removal tool 20 according to an embodiment of the present invention, respectively.
3A to 3E are a front view and a side view showing an embodiment of the present invention in use. 12... Key top cover, 20... Removal tool, 21, 23... Locking tool, 22... Lever,
25...Press rod, 27...Removal tool body, 28
...Spring, 29...Handle.

Claims (1)

[Claims for Utility Model Registration] A removal tool body, which is made of an elastic wire and has a U-shape, and the U-shaped bent portions are arranged substantially parallel to each other at predetermined intervals and have free ends. a pair of locking tools attached to the removal tool body so as to be able to enter and exit the removal tool body, and applying a pressing force toward the U-shaped bent portion by a spring inserted in the removal tool main body. and a push rod, the key top cover being pulled out while holding the key top cover between the U-shaped bent portion and the push rod.
Cover removal tool.