JPH0327293Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates in particular to an improvement in the mounting structure of the large keys in keyboards used in various input devices such as personal computers and word processors.

(Prior art) This type of conventional mounting structure is as shown in FIG.
Internal contacts (not shown) are installed vertically and horizontally on the printed circuit board 1.
A plurality of push button switch bodies 2 each having a vertically movable stem 3 with a fitting groove 3a that connects and separates the push button switch bodies 2 are arranged regularly, and the panel board 4 disposed above the printed circuit board 1 is placed near each switch body 2. A fixing hole 5 is formed in each of the fixing holes 5, and a bearing member 6 is firmly fixed in each of the fixing holes 5, and the bearing member 6 has a U-shaped bent portion 7a with both ends bent inwardly. It is configured to fit into the center of the lever 7.

On the other hand, the key top 8 has fitting parts 8a formed on both sides of its lower part and a fitting protrusion 8b in the center, and the protrusion 9 of the support member 9 is formed on each fitting part 8a on both sides.
a, engage each bent portion 7a of the lever 7 into the engagement groove 9b of each support member 9, and insert the center fitting protrusion 8b of the lever 7 into the engagement groove 9b of the switch body 2. The structure is such that the large key is attached by fitting into the fitting groove 3a.

(Problems to be Solved by the Invention) However, in the conventional structure described above, in addition to the key top 8, the switch body 2, and the lever 7, two bearing members 6 and two supporting members 9 are required.
Not only does this naturally increase the number of parts, resulting in higher costs, but it also has the problem of making the work of attaching and removing the key top 8 extremely complicated.

Moreover, mounting the two support members 9 on both sides of the key top 8 creates a dead space inside the key top 8, which causes the problem that only one push button switch body 2 can be placed for one key top 8. are also invited.

Furthermore, when removing the key top 8, since the bearing member 6 is firmly fixed to the fixing hole 5 of the panel board 4 as described above, even if the key top 8 is pulled out from the stem 3, the lever 7 does not hold the support member 9. Since the key top 8 is still attached to the bearing member 6, there is a problem in that the key top 8 itself cannot be reset to an arbitrary position according to the user's wishes.

(Means for solving the problems) The present invention was developed to effectively solve the problems of the conventional mounting structure described above. In a large key mounting structure in which an elongated key top is attached to a push button switch, a fitting protrusion, a contact portion, and a lever mounting portion are provided on the back of the elongated key top, and below the elongated key top, The first switch main body and the second switch main body are arranged, and the bent parts of both ends of the U-shaped lever are attached to the lever mounting part, and the center part of the lever is a separate part to which this long key top is not attached. It is configured to be slidably inserted into the engaging portions of the third and fourth switch bodies, the fitting protrusion is fitted and attached to the first switch body, and the abutting portion is inserted into the second switch body when a long key top is pressed. It is configured to come into contact with the top surface of the switch body.

(Function) Accordingly, in the present invention, after the lever is supported on the long key top, the lever is inserted into the engaging portion protruding from the side wall of another push button switch body that is not located below the long key top. Simply attaching the key top to the desired push button switch body after obtaining the inserted state ensures that the key top is securely attached and operates smoothly, and eliminates the need to change the key top's attachment position. In such a case, the key top can be easily removed together with the lever, so if the key top is attached to the push button switch body at the location to be changed in the same condition as above, the mounting position can be easily changed. Furthermore, during a press operation, the abutting portion comes into contact with the top surface of the push button switch body, which does not require a switch operation, and prevents the stem from moving downward, which prevents the switch body from being accidentally operated. Also, there is no need to worry about the key top itself tilting when pressed due to contact.

(Embodiment) Below, the present invention will be described in detail based on an illustrative embodiment.The mounting structure according to the embodiment also includes push button switch bodies 12 regularly arranged in the vertical and horizontal directions of a printed circuit board 11, It is common to the conventional mounting structure in that it includes a key top 18 having a fitting protrusion 18b that fits into the fitting groove 13a of the stem 13 of the main body 12, and a U-shaped lever 17 that facilitates the operation of the key top 18. However, its distinctive feature lies in the following structure.

That is, each switch body 12 has a rectangular cross section.
As shown in FIG. 1, the sides have an upper piece 20a and a lower piece 20 that extend outward in parallel on both orthogonal walls.
b, and an engaging portion 20 for slidably inserting the center portion of the lever 17 into the space defined between the upper and lower pieces 20a and 20b is integrally provided.

On the other hand, on the key top 18 side, as shown in the figure, engagement holes 21 are formed on both sides to engage the bent portions 17a and 17a at both ends of the lever 17, so that the lever 17 can be folded directly without using the conventional support member. The curved portion 17a is supported in the insertion hole 21 of the key top 18, thereby eliminating dead space within the key top 18 and allowing two push button switch bodies 12 to be placed inside.

Further, on the key top 18 side, there is a fitting groove 13a for the stem 13 of the switch body 12 on one side of the lower part.
A fitting protrusion 18b is formed to fit with the main body 12, and an L-shaped contact portion 22 is newly formed on the other side to abut on the top surface of the main body 12, which does not require a switch operation when pressed. The fitting protrusion 18b is fitted into the stem 13 of one of the two switch bodies 12, and the other switch body 12 and the contact portion 22 are made to face each other. Note that 14 in the figure is a panel board disposed above the printed circuit board 11.

Therefore, when installing the large key under such a configuration, first insert the insertion holes 21 and 21 on both sides of the key top 18.
After each bent portion 17a of the lever 17 is inserted into the key top 21 and the lever 17 is rotatably supported directly on the key top 18, the lever 17 is inserted into the adjacent push button as shown in FIGS. 2A and 2B. The fitting groove 1 of the stem 13 of the switch main body 12 is inserted into the engaging portion 20 protruding from the side wall of the switch main body 12, and the fitting protrusion 18b of the key top 18 is positioned on one side.
3a, it can be installed extremely easily.

Then, when the key top 18 is pressed from this installed state, the lever 17 is pressed as shown in FIG.
In conjunction with the pressing operation, the key top 18 slides toward the back inside the engaging portion 20 to allow the key top 18 to descend, allowing reliable switch operation of the switch body 12 located on one side.

Moreover, during the pressing operation, as shown in FIG. Not only is there no need for the switch to be operated by moving downward, there is also no fear that the key top 18 itself will tilt when pressed due to this contact.

In addition, if it becomes necessary to change the mounting position of the long and large key top 18 installed in such a state, for example from the state shown in FIG. 4A to the state shown in FIG. By pulling out the key top 18 from the stem 13 of the push button switch body 12, the key top 18 can be easily removed together with the lever 17, so that the removed key top 18 can be attached to the stem 13 of the desired push button switch body 12 at the change location. If they are fitted in the same manner as above, the mounting position can be easily changed.

Furthermore, as described above, each push button switch main body 12 has engaging portions 20 protruding from two orthogonal sides of its four side walls, so that the engaging portions 20 on the two sides can be appropriately selected. Therefore, the mounting position of the key top 18 can be changed in any state. still,
After the key tops 18 are removed, small square key tops are independently attached to each push button switch body 12 and used as individual small keys.

Note that not only two switch bodies but three or more switch bodies may be arranged inside the key top 18.

(Effect of the invention) In a large key mounting structure in which push button switches are arranged vertically and horizontally on the board and a long key top is attached to the push button switch, the back of the long key top has a mating protrusion and a contact portion. A first switch body and a second switch body are arranged below this long key top, and bent parts at both ends of the U-shaped lever are attached to the lever mounting part. , the central part of the lever is configured to be slidably inserted into the engaging parts of the separate third and fourth switch bodies to which this long key top is not attached, and the engaging protrusion is inserted into the first switch body. The structure is such that the abutting part comes into contact with the top surface of the second switch body when the key top of a long size is pressed during mating installation, making it possible to greatly reduce the number of parts and greatly reducing costs. This will allow us to contribute.

Moreover, the structure in which the central part of the lever, whose bent part is supported by the key top, is slidably inserted into the engaging part of the adjacent push button switch body makes it extremely easy to attach and remove long key tops. Become.

Further, since the push button switch main body according to the present invention has engaging portions protruding from each of its orthogonal side walls, by appropriately selecting the two engaging portions,
It is now possible to freely attach a long key top to the push button switch body in a position desired by the user, making it possible for the first time to change the key top mounting position, something that could not be expected with conventional structures.

Furthermore, the present invention is characterized in that a contact part is provided at the lower part of the key top to contact the top surface of the switch body, and the contact part is brought into contact with the top surface of the switch body when the key top is pressed. Even if multiple switch bodies are placed in the same place, the abutment part will not only prevent the switch body from coming into contact with the top surface of the switch body that does not require switch operation and cause the switch body to be operated incorrectly, but also prevent the key top itself from touching when pressed. This also prevents it from tilting.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the main parts of the mounting structure according to the embodiment of the present invention, Figs. 2 A and B are side views of the main parts showing the same mounting state from two directions, and Figs. 3 A and B are key top views. 4A and 4B are explanatory diagrams showing an example of changing the key top mounting position, and FIG. 5 is an exploded perspective view showing the conventional mounting structure. . DESCRIPTION OF SYMBOLS 11... Printed circuit board, 12... Push button switch, 13... Stem, 13a... Fitting groove, 17...
... Lever, 18 ... Key top, 20 ... Engagement portion, 21 ... Engagement hole, 22 ... Contact portion.

Claims (1)

[Scope of utility model registration request] In the large key mounting structure, the push button switch body is arranged vertically and horizontally on the board, and a long key top is attached to the push button switch body.The back of the long key top has a mating protrusion, a contact part, and a lever attachment. A first switch main body and a second switch main body are arranged below the long key top, and bent parts at both ends of the U-shaped lever are attached to the lever mounting part. The central portion is configured to be slidably inserted into the engaging portions of separate third and fourth switch bodies to which this long key top is not attached, and the fitting protrusion is fitted and attached to the first switch body. A mounting structure for a large key, characterized in that the contact portion is configured to contact the top surface of the second switch body when the long key top is pressed.