JPH0435945Y2 - - Google Patents

Description

[Detailed description of the invention] - Industrial application field - This invention relates to a key press prevention device for preventing malfunctions caused by a specific key on a keyboard being pressed by mistake. .

-Prior Art- If a key with an interrupt function or a data deletion function is pressed by mistake during program execution, a serious problem will occur, such as interruption of execution and data loss. Particularly when a computer is used by a large number of people including general office staff, it is important to prevent such problems from occurring.

One way to solve this problem is to cover a specific key group 1...1 with a push-preventing cover 2 as shown in FIG. 3 is installed so that the interrupt key and the data deletion key cannot be pressed. In the figure, 4 is the bottom plate of the keyboard,
5 is a housing cover, 6 is a printed board to which contact elements 7...7 are attached, 8 is a protective insulating sheet, 9 is a stem extending from each contact element 7, and 10 is a key top attached to the top of the stem. The one in FIG. 8 is intended to prevent the pressing of keys arranged in a group on the keyboard with a pressing prevention cover 2 placed on the housing cover 5. 9 shows a push-down prevention ring 3 interposed between the key top 10 and the printed board 6.
This is an attempt to prevent the pressing of a specific key.

-The problem that the invention attempts to solve- However, the one in Figure 8 is a group of keys 1
...Even when it is desired to prevent the pressing of only one key in 1, pressing of all keys in a group including that key is prevented, and other keys cannot be used. In addition, the one shown in FIG. 9 has the trouble of having to remove the key top 10 one by one when attaching and removing the press prevention ring 3, and it is not obvious at first glance that the key cannot be pressed anymore. A situation may arise in which a user starts a task that cannot be executed unless the key is pressed, and the task that was completed before realizing that the key cannot be used is wasted.

-Means for solving the problem- Therefore, in this invention, a structure is adopted in which a plastic cap 15, 15a is attached to each key 1 mounted on a printed board 6 to prevent the key from being pressed. are doing.

Key press prevention cap 15, 15 of this invention
a has an internal dimension that is just fitted to the key top 10, a thickness t that is slightly thinner than the gap T between the key tops 10, 10, and a free height H of the key top 10 from the printed board 6. Legs 13, 13a having a slightly longer length h are provided.
The legs 13 provided on opposite sides of the square top plate 12 have a width d narrower than half the length D of one side of the top plate, and are provided offset to one end of the side. There is.

-Function- The push-down prevention cap with the above structure has its legs 13,
By inserting the key top 13a into the gap T between the key tops 10 and placing it on the printed board 6, one key is attached to the key 1, and the key is prevented from being pressed by the top plate 12. Installed cap 15,
The legs 13, 13a of 15a are the key tops 10, 1
Since it has a thickness that allows it to be inserted almost fully into the gap T between 0 and 0, it can sufficiently withstand pressing force from fingers. The legs 13 provided on the opposite sides of the top plate 12 have a width d narrower than half of the length D of one side of the top plate 12, and are biased toward one end. 1 key with 1 leg
3 and 13a can be crowned without interfering with each other. Furthermore, since it is made of plastic, there is no fear that the printed board 6 or the protective insulating sheet 8 will be damaged by the tips of the legs 13, 13a.

-Embodiment- Fig. 1 shows a first embodiment of the key press prevention cap of this invention, in which 12 is a top plate and 13 is a leg, which is an integrally injection molded plastic product. A through hole 14 is provided at the center of the top plate 12, and four legs 13 are provided symmetrically about the center of the top plate 12. Each leg 13 has a width d that is slightly less than half the length D of the side of the top plate on which it is provided, and is placed toward one side of each side. As shown in FIG. 3, the legs 13 are supported by the printed board 6 with their tips abutting against the protective insulating sheet 8 of the printed board 6. FIG. 2 is a plan view showing a state in which some of the keys of the key group 1...1 arranged in a matrix are covered with the push-down prevention caps 15 shown in FIG. The legs 13 of the cap are shown inserted into the gap T between the keys 1, 1 without interfering with each other.

The keys that generally need to be prevented from being pressed are various function keys, and the function keys are generally arranged in a regular matrix on the keyboard, so the arrangement structure of the legs 13 shown in FIG. It is convenient to handle because it does not have any directionality.

However, character keys are usually arranged in a staggered row direction as shown in Fig. 6, and when the keys are arranged in a staggered manner, the legs 13 of the cap shown in Fig. 1 are arranged in a staggered manner. Adjacent keys 1, 1 cannot be fitted with caps 15 because of interference.

If it is anticipated that it is necessary to prevent pressing of adjacent keys in a group of keys arranged in a staggered manner, the fourth
The structure shown in the figure is adopted as a more preferable structure.

The one shown in FIG. 4 has a leg 13a having a side length D on one side of a square top plate 12, and legs 13a having a width d smaller than half of the side on both sides sandwiching the side.
3 is provided on the opposite side of the leg 13a.

If the structure shown in Fig. 4 is used, Figs. 5 and 6
As shown in the figure, whether the key arrangement is in a regular matrix or in a staggered manner, the keys 1, 1 are adjacent to each other without causing the legs 13, 13a to interfere with each other.
can be crowned.

Note that in the case of the keys arranged in a regular matrix shown in FIG.
In the case of staggered keys, all the caps 15a are mounted in the same direction.

Note that the through hole 14 provided in the top plate 12 of the caps 15, 15a in the above embodiment allows the user to press the key 1 with the cap mounted through the through hole 14 with the tip of a ballpoint pen, etc., if operation is required. By providing this, it is possible to prevent the key 1 from being pressed by an erroneous finger movement, and if necessary, the caps 15, 15a can be pressed.
The effect is that the key can be pressed while wearing the key.

-Effects of the invention- According to the key press prevention cap of this invention described above, it is possible to prevent any key on the keyboard from being pressed due to erroneous operation, it is easy to attach and remove, and it is possible to prevent multiple keys from adjacent This has the effect of providing a key press prevention tool that can be attached to a key and has sufficient strength.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the first embodiment of this invention;
Fig. 2 is a plan view showing a part of the keyboard equipped with the keyboard, Fig. 3 is a sectional view of section A in Fig. 2, Fig. 4 is a perspective view showing the second embodiment, Figs. The figure is a plan view showing the state in which this is attached to keys arranged in a regular matrix shape and a staggered shape, FIG. 7 is a sectional view of part B in FIG. 5, and FIG. 8 is a sectional view showing the first conventional example. FIG. 9 is a sectional view showing a second conventional example. In the figure, 6...Printed board, 12...Top plate, 1
3, 13a... Leg, 14... Through hole, 15, 15a
...Press prevention cap, D...Length of the sides of the top plate, d...Width of the legs, T...Gap between keys, t...
...Thickness of the leg, H...Free height of the key, h...Length of the leg.

Claims (1)

[Claims for Utility Model Registration] (1) A substantially square top plate 12 corresponding to the planar shape of the key top has legs 1 extending downward from its sides.
3, 13a are integrally provided, and the legs 13, 13
a has a thickness t that is inserted into the gap T between the key tops with a slight play, and a length h that is slightly longer than the free height H of the key 1 from the surface of the printed board 6 in the keyboard. and the top plate 1
2, the legs 13 provided on opposite sides of the cap have a width d narrower than half the length D of the sides, and are provided offset to one end of the sides. (2) The key press prevention cap according to claim 1, wherein the top plate 12 is provided with a through hole 14.