JPS61277123A - Push button pitch varying keyboard switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a keyboard switch in which a large number of push button switches are arranged in a matrix, such as a channel selection switch attached to a push button type telephone. In particular, the assembly structure of the housing and the plunger has been improved, and the pitch between the push buttons can be changed by incorporating the plunger into the housing while slightly changing the orientation and position of the plunger.

[Conventional technology and its problems]

As shown in FIG. 1, this type of general keyboard switch has a configuration in which push buttons 40 are attached to a number of plungers (not shown) that are attached to a housing 30 so as to be movable up and down.

However, in the past, the plunger was installed at housing 3.
0, therefore, for models in which the pitch Q of each push button 40 arranged in a matrix (the distance between the center lines of each push button 40) is different, a new housing is required for each type of pitch. There was a drawback that 30 had to be redesigned.

[Means for solving problems]

The present invention provides two protrusions that are offset from each other by a distance P in the X-axis direction and parallel to the Y-axis, and two protrusions that are offset from each other by a distance P in the Y-axis direction and parallel to the X-axis on the side of the plunger. It is characterized by a structure in which four groove groups are formed around each plunger mounting hole provided in the housing, into which the protrusion of the plunger can be fitted.

According to the present invention, keyboard switches with three push button pitches, ``standard'', ``standard +P'', and ``standard -P'' can be easily constructed using the same housing and plunger. That is, if each plunger is installed in the housing in a fixed orientation, a standard pushbutton pitch will be obtained, whereas if each plunger is installed in a fixed orientation in the housing, a standard pushbutton pitch will be obtained, whereas if the orientation of each plunger is changed in 90" increments,
If it is assembled into a housing while moving in parallel along the axis or the Y axis, a keyboard switch with a "standard +P" or "standard -P" push button pitch can be obtained.

〔Example〕

Hereinafter, using a so-called 25-key keyboard switch as shown in FIG. 2 as an example, a case will be described in which three types of keyboard switches in which the difference in push button pitch is length P are constructed from common parts.

FIG. 3 is a partial side view showing one embodiment of the keyboard switch according to the present invention, with one push button switch section cut away. An elastic rubber member 60 holding a movable contact 64 on the lower surface of a dome-shaped portion 62 is mounted on the printed circuit board 50 fixed to the lower part of the housing 30. A plunger 70 like this is mounted. A push button 40 is engaged with a hole 76 provided in the center of the plunger 70 by fitting its shaft portion 42 thereinto, and the plunger 70 is made vertically movable together with the push button 40 within the plunger mounting hole 38 of the housing 30. There is. Each switch section is constructed in this manner, and when the push button 40 is pressed down, the movable contact 64 that descends connects a set of fixed contacts 52 provided on the surface of the printed circuit board 50 to operate the switch.

The keyboard switch of the present invention is characterized by the structure of the plunger 70 and the housing 30.
As is clear from the plan view of FIG. 5, there are two protrusions 71 and 73 that are deviated from each other by a distance P in the X-axis direction and parallel to the Y-axis, and two protrusions 71 and 73 that are deviated from each other by a distance P in the Y-axis direction. Two protrusions 72 and 74 parallel to the X-axis are provided to protrude in all directions from the sides of the plunger. M indicates the center position of the push button mounting hole 76.

FIG. 6 is a view of the housing 30 seen from below. On the inside of the housing 30, four groove groups 31, 32, 33, and 34 are formed around the plunger mounting hole 38. The groove group 31 includes three grooves 3 provided at a pitch of 2P parallel to the Y axis.
The groove group 32 consists of three grooves 32A, 32B, and 3 provided at a pitch of 2P parallel to the X axis.
Consists of 2C. Similarly, the groove group 33 consists of three grooves 33A, 33B, and 33C parallel to the Y axis with a pitch of 2P, and the groove group 34 consists of three grooves 34A parallel to the X axis with a pitch of 2P. - Consists of 34B and 34c. 7, which is an explanatory view of the housing 30 seen from above.
As is clear from the figure, the groove group 31 and the groove group 33 are shifted in position by a distance P along the X axis, and the groove group 32 and the groove group 34
are formed by shifting their positions by a distance P along the Y axis.

The housing 30 has such groove groups 31 to 34 around it.
A number of plunger mounting holes 38 corresponding to the respective push buttons 40 are formed in a matrix along the X-axis and Y-axis directions. In addition, in the figure, 36 is a partition plate that separates each groove.

Next, a method of combining the housing 30 and the plunger 70 will be described, taking as an example a case where the standard pitch of push buttons is 19 cranes and the same component parts constitute a 25-key keyboard switch with pitches of 18 mm and 20 m.

First, in the case of the standard 19m pitch, the plungers 70 of all switches are oriented as shown in FIG.
into the respective mounting holes 38 of. That is, the protrusions 71, 72, 73, and 74 are connected to the grooves 31B and 32, respectively.
Make sure to fit it into B/33B/34B. The respective mounting holes 38 are formed in advance so that when the push buttons 40 are attached to the plunger 70 arranged in this manner, the pitch of each push button 40 becomes the standard 19fi.

On the other hand, when setting the pitch of the push buttons 40 to 20 m, based on the position of push button "13" at the standard pitch of 19 m,
The other pushbuttons 40 must be moved in the direction indicated by the arrows in FIG. Note that the numbers 1 to 25 attached to each arrow and dot in FIG. 8 correspond to the push buttons 40 from "1" to "25" in FIG. The length of each arrow is the corresponding push button 4
The arrow 3 indicates the upward movement of 2 m, and the arrow 8 indicates the upward movement of 1 fl. This also applies to FIG. 9, which will be described later.

Therefore, while the push button "13" is being plunged, it may be in the position shown in FIG. 10, but for the other push buttons 40, it is necessary to move the position of the center M of the hole 76 of each plunger in accordance with the direction of this arrow and the moving distance. . For example, the push button 40 of "1" needs to be moved 2 fi to the left in the figure and two moves upward in the figure, based on the push button 40 of "13" as indicated by the arrow 1. Similarly, the push button 40 for "2" moves 1 fl to the left, 2 fl to the top (arrow 2), and the push button 40 for "3" moves 2 fl to the left (arrow 3).
The push button 40 of "8" moves upwards only 1 m (arrow 8), "11"
'' must be moved only 2IIm to the left (arrow 11).

By the way, the pitch of the multi-grooves 31A, 31B, 31C, etc. in the groove groups 31, 32, 33, 34 is 2 as described above.
It is set to P. This P· corresponds to the difference in push button pitch of three types of keyboard switches that are intended to be constructed from common parts. In this example, each pitch is 18 cranes, 19 m, and 2 pitches.
Since it is 0m, P becomes 1fl and 2P becomes 2 cranes.

Therefore, "1", "3", and
"5", "11", "15", "2nd grade", "23"
- Regarding the push button 40 "25" (the push button marked Q in FIG. 14), the desired push button position can be obtained by moving the plunger 70 in the direction shown in FIG. 10 in parallel.

In other words, in the case of push button "11", move the plunger 70 two positions to the left and move the protrusions 71 and 73 into the grooves 31A and 33, respectively.
A, and in the case of push button "1", move the plunger 70 further upwards so that the protrusions 72 and 74 are fitted into the grooves 32A and 34A, respectively, and into the mounting holes 38 corresponding to the respective push buttons 40. Just incorporate it.

The push buttons marked with ○ in Figure 15 are "2", "4" °, and "12".
” ・“14” ・“22” ・“24” are push buttons that require a shift of the push button pitch plus 111 along the X axis when compared with the push buttons marked with a circle in FIG. These push buttons 40 can be assembled into the respective mounting holes 38 of the housing 30 by rotating the plungers 70 90' counterclockwise and then moving them in parallel without changing their orientation, as in the case described above. I can handle it. For example, FIG. 11 shows the arrangement of plunger 70 corresponding to push button "14".

If this plunger 70 is moved to the left by a distance of - groove (2 m), it will be in a position corresponding to push button "12", and if it is moved upward, it will be in a position corresponding to push button "4". Even though the pitch between the grooves is 2fi and the same grooves are used, the reason why the push button has a positional shift of IB along the X axis compared to the case shown in FIG. This is because the protrusion 72 is eccentrically provided by P (=1 m), whereas it extends straight. That is, in the case of the protrusion 71 and the protrusion 72, when inserted into the grooves 31A, 31B, and 31C of the groove group 31, there will be a deviation of 1fi along the X axis in the position of the center M of the plunger hole 76. Become. Note that, as is clear from FIGS. 10 and 11, this 1fi deviation does not occur in the direction along the Y-axis.

The push buttons marked with ○ in Figure 16 are “7”, “9”, and “17”.
"19" is a push button that requires a shift of push button pitch plus one crane along the Y axis, compared to the push button marked O in FIG. In the case of these push buttons, after the plunger 70 is further rotated 90 degrees counterclockwise, the plunger 70 may be assembled into the housing 30 while maintaining its orientation and moving in parallel. Figure 12 shows a plunger 70 corresponding to push button "7"
The installation position in the mounting hole 38 is shown. In this way, the reason why a further deviation of 1 mm along the Y axis occurs in FIG. 12 compared to the case in FIG.
This is because, similar to the relationship No. 2, the protrusion 73 is provided eccentrically by P (=1 m), whereas the protrusion 74 extends straight from the center M. That is, in the case of the protrusion 73 and the protrusion 74, the grooves 32A and 32A of the groove group 32
When inserted into 32B/32C, the hole 7 of the plunger
This results in a shift of one centimeter along the Y axis at the center M of 6.

Push buttons “6”, “8”, and “10” marked with O in Figure 17
・“16” ・“1B” ・“20” are push buttons that require a further shift along the Y axis of the push button pitch plus one crane, in contrast to the push buttons marked with an O in FIG. For these push buttons 40, the plunger 70 may be further rotated 90 degrees counterclockwise and then incorporated into the housing 30 while being translated in parallel. FIG. 13 shows the installation position of the plunger 70 corresponding to push button "6". Although the same groove is used, the positional deviation of 111 along the Y axis occurs in FIG. 13 compared to the case of FIG. 12 because the protrusion 73 is provided eccentrically by P (=1 m). This is because the projection 74 extends straight from the center M, whereas the projection 74 extends straight from the center M. That is, in the case of the protrusion 73 and the protrusion 74, when inserted into the grooves 31A, 31B, and 31C of the groove group 31, the position of the center M of the plunger hole 76 is shifted by one point along the Y axis. become.

Next, using common parts, the pitch of the push button 40 was adjusted to 18fl.
Describes how to configure keyboard switches for .

When the pitch is 18 mm, the other push buttons 40 must be moved in the direction shown by the arrow in FIG. 9, based on the position of the push opening "13" at the standard pitch 19+u. For this purpose, it is necessary to move the position of the center M of the hole 76 of each plunger in accordance with the direction of this arrow and the moving distance. For example, the push button 40 of "1" moves 211 to the right in the figure with the push button 40 of "13" as a reference, as indicated by the arrow 1.
A downward movement of 2fi is required. Similarly, the push button 40 of "2" moves 1fl to the right, 2m downward (arrow 2), r3J
The push button 40 of r8J has to move only 2 fl downwards (arrow 3), the push button 40 of r8J has to move only 1 m downward (arrow 8), and the push button 40 of rllJ has to move only 211 m to the right (arrow 11).

As is clear from comparing Figures 9 and 8, when the pitch is reduced to 18m, the distance traveled by each push button 40 is the same as when the pitch is expanded to 2On, and the direction of each arrow is opposite. It just becomes. In other words, it can be seen that the combination of the moving direction and moving distance of the plunger 70 necessary to make the pitch 180, that is, the type of arrow, is exactly the same as in the above-mentioned case where the pitch is 20 m.

For example, when pushing button "25", if the pitch is set to 18 cranes, it is necessary to move 2 cranes to the left and 2 cranes upwards as shown by arrow 25 in Figure 9, but this is the same arrow in Figure 8. is the push button "1"
” is the arrow 1 corresponding to “. Therefore, the pitch is 18
If the plunger 70 of push button r and 25J when fl is installed in the plunger mounting hole 3 for push button "25" of the housing 30 in the same state as the plunger 70 of push button "1" is arranged when the pinch is 20 mm, It will be a good thing.

Similarly, arrow 20 corresponding to push button "20" in FIG. 9 is arrow 6 of push button "6" in FIG. Therefore, when the pitch is 18 fins, the plunger 70 of push button "20" is
In the case of pitch 20n+, the plunger 70 of push button "6" may be installed in the mounting hole 38 for push button "20" of the housing 30 in the same state as shown in FIG. 13, that is, in the state shown in FIG.

By similarly incorporating plungers 70 for other push buttons into the housing 30, a keyboard switch with 18 dragon pitches can be constructed.

Although the above description has been made using an example of a 25-key keyboard switch, the present invention can of course be applied to other keyboard switches having a different number of push buttons. For example, 12 as shown in Figure 1.
In the case of a key keyboard switch, the amount of movement indicated by each arrow in the area surrounded by dotted lines in FIGS. 8 and 9 may be used as the amount of movement of the plunger of each of the push buttons "1" to "#". In this case, the - row at the top end (or bottom end) and the two rows at the left and right ends are unnecessary, so the number of grooves in each groove group 31, 32, 33, and 34 provided in the housing 30 is reduced as shown in FIG. Two pieces of each will be enough. In other words, the groove group 31 is composed of two grooves 31A and 31B parallel to the Y-axis with a pitch of 2P, and the groove group 32 is composed of two grooves 32A and 32B parallel to the X-axis with a pitch of 2P. do. Similarly, the groove group 33 is composed of two grooves 33A and 33B parallel to the Y-axis with a pitch of 2P, and the groove group 34 is composed of two grooves 34A and 34B parallel to the X-axis with a pitch of 2P. Configure. Then, like the housing for 25 keys, groove group 3
1 and the groove group 33 are shifted by a distance P along the X axis,
The groove group 32 and the groove group 34 may be formed with their positions shifted by a distance P along the Y axis. As the plunger to be incorporated into this housing 30, the plunger 70 used in the previous 25 keys can be used as is.

The above embodiment describes the case where a keyboard switch with three different push button pitches is configured using common parts, but it is also possible to configure a switch with four or more push button pitches by increasing the number of grooves in each groove group. is also possible.

〔Effect of the invention〕

According to the present invention, keyboard switches with three or more push button pitches can be configured using a common housing, so the number of types of housings can be reduced. therefore,
Only a small number of expensive molding dies for the housing are required, and costs can be significantly reduced. In addition, since the pitch between each groove provided in the housing can be twice the difference in push button pitch, the partition plate between the grooves can have sufficient strength.
It also has the advantage of being easy to mold.

[Brief explanation of drawings]

1 and 2 are plan views of a 12-key and 25-key keyboard switch, respectively, FIGS. 3 to 13 relate to an embodiment of the present invention, and FIG. 3 is a partially cutaway view of the keyboard switch. 4 is a perspective view of the plunger, 5 is a plan view of the plunger, 6 is a bottom view of the housing, 7 is an explanatory view of the housing viewed from above, and 8 is a pinch An explanatory diagram showing the moving direction of the push button when enlarging , FIG. 9 is an explanatory diagram showing the moving direction of the push button when reducing the pitch,
Figures 10 to 13 are explanatory diagrams showing how the plunger is attached to the housing in different directions, and Figures 14 to 17 are
The figure is an explanatory view showing push buttons that can be supported by plungers oriented in the same direction, and FIG. 18 is a bottom view showing another embodiment of the housing.

Claims (1)

[Claims] In a keyboard switch in which a large number of pushbutton switches are arranged in a matrix along the X-axis direction and the Y-axis direction,
A first groove group and a second groove group each having a plurality of grooves provided parallel to the X-axis at a pitch of 2P are formed by separating the plunger mounting hole and shifting the positions by a distance P in the Y-axis direction. At the same time, a third groove group and a fourth groove group each having a plurality of grooves provided at a pitch of 2P parallel to the Y-axis are separated from each other by the plunger mounting hole and are shifted in position in the X-axis direction by a distance P. The formed housing, two protrusions that are offset from each other by a distance P in the X-axis direction and parallel to the Y-axis, and two protrusions that are offset from each other by a distance P in the Y-axis direction and parallel to the X-axis from the side. 1. A push button pitch variable keyboard switch comprising plungers projecting in all four directions, and these projections being configured to be insertable into each of the grooves.