JP2592822Y2 - Rubber contact key structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a rubber contact key structure, and more particularly, to a cursor or the like displayed on a display screen of a CRT or the like provided in various devices such as a measuring device, for example, in the X-Y direction. In addition, the present invention relates to a rubber contact key structure which can be suitably used in a case where two directional components of an X direction and a Y direction are calculated and moved in a 45 ° direction.

[0002]

2. Description of the Related Art CRTs provided in various devices such as measuring devices
Among the operation keys used to move a cursor or the like displayed on a display screen (hereinafter, the cursor will be described as an example) in the forward / backward (up / down) left / right directions, a sheet covering a necessary portion of the printed wiring board is included. There is a so-called rubber contact key, which is integrally formed of a portion and a key portion which is floated from the printed wiring board so that the contact portion contacts a predetermined position of the printed wiring board when pressed.

FIG. 4 shows an example of a conventional structure of such a rubber contact key. According to this, key portions 1, 2, 3, and 3 for moving a cursor back and forth (up and down) and right and left directions. 4 is a total of 4 for each direction.
The cursor is independently disposed at any one of the positions, and the cursor can be moved in a corresponding direction, that is, to the left by pressing any one of the keys, for example, the key unit 3 located on the left.

In order to move the cursor in an oblique direction, two adjacent key portions, for example, two key portions 1 and 3 located on the upper and left sides in the figure are simultaneously pressed to move the cursor upward and diagonally to the upper left. You can move to.

[0005]

By the way, the cursor can be moved in any direction by using the above-mentioned conventional example, and the keys 1, 2, 3, and 4 themselves are independently arranged. It was easy to see.

However, the key unit 1 and 3 in the, for example, FIG. 4 when trying to move the cursor to the diagonal direction
, The cursor can be moved diagonally to the upper left by pressing the two keys at the same time, so that the two adjacent key parts must always be pressed, resulting in inconvenience in operation.

In addition, arranging the four key portions 1, 2, 3, 4 independently on the operation panel 5 having a relatively limited narrow space requires a correspondingly large space. There was also a problem that became a bottleneck in downsizing.

[0008]

SUMMARY OF THE INVENTION This invention has been made in view of the above problems found in the prior art, the characteristics of its structure, a seat portion which is placed on the printed wiring board, the It is composed of a key part that is lifted by applying an automatic restoring force by a rising part
Is, on the bottom surface of the key section, distribution so as to be separated from the opposite plate surfaces of the printed wiring board at a distance to the front, rear, left and right directions
And a total of four contact portions which are location, enclosed at the inside of the contact portion
The opposing board surface of the printed wiring board located in the screen
And a fulcrum arranged so as to always contact
In the rubber contact key, the fulcrum portion is
A main fulcrum provided at the center of the center of the area screen;
Create a gap around the point and on the side facing each contact
A total of four substantially circular arcs interposed and arranged in a substantially annular shape
Between two adjacent contact points with the auxiliary fulcrum
Formed to allow simultaneous contact of the lint wiring board with the opposing board surface
I did it.

[0009]

For this reason, the operator presses down the upper surface corresponding to the positions of the four contact portions provided on the bottom surface of the key portion with fingers, thereby tilting the key portion while being supported by the fulcrum portion. Since the contact portion located on the depressed side can be forcibly brought into contact with the opposing plate surface of the printed wiring board, the cursor can be moved in a fixed direction defined by the contact portion.

By depressing the upper surface corresponding to an intermediate position between two adjacent contact portions, the main fulcrum portion and the auxiliary fulcrum portion are depressed.
The key portion is tilted while being supported by the fulcrum portion, and the two contact portions located on the depressed side can be forcibly brought into contact with the respective opposing plate surfaces of the printed wiring board at the same time. The moving direction of the cursor defined by these contact portions is combined, and the cursor can be moved in a predetermined oblique direction.

Further, the fulcrum is composed of a main fulcrum and an auxiliary fulcrum.
So that even if you press the center part of the key part
Either contact part contacts the opposing board surface of the printed wiring board.
Can be reliably prevented. Furthermore, unconscious
Or consciously touch the key part lightly
Contact between the contact part and the opposing board surface of the printed wiring board
Can be prevented from being
The moving operation can be performed more reliably.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view showing a longitudinal sectional shape of an embodiment of the present invention, and FIG. 2 is an explanatory view showing a bottom shape on a side of a rubber contact key.

[0014] According to these figures, the whole is composed of a sheet portion 12 placed at a predetermined position on a printed wiring board 22,
The key portion 15, which is provided with an automatic restoring force after being pushed from the upper surface 20 side by the rising portion 14 interposed between the seat portion 12 and the key portion 15 which is lifted, is made of rubber material such as silicon rubber. The contact key 11 is formed integrally.

In this case, the shape of the key portion 15 may be a square shape as shown in FIG.
A material having an appropriate planar shape can be used, and the size thereof can be appropriately changed as desired.

The rising portion 14 interposed between the seat portion 12 and the key portion 15 and giving the key portion 15 an automatic restoring force together with a click feeling is taken into consideration in consideration of the weight of the key portion 15 and the like. It is formed with an appropriate thickness by doing
In addition, it is preferable that a tilt angle of about 45 degrees be provided between the border 13 of the sheet portion 12 and the peripheral edge 17 located on the bottom surface 16 side of the key portion 15.

On the other hand, on the bottom surface 16 of the key portion 15 formed in such an arrangement relation, a constant distance is provided in the front, rear, left and right directions (up and down and right and left directions in FIG. 2). And the printed wiring board 2
A total of four contact portions 1 separated from the opposing plate surface 23
8 are provided.

In this case, each of the contact portions 18
As shown in the illustrated example, it can be formed by applying a carbon paint to the protruding end surface of a columnar protrusion such as a column protruding from the bottom surface 16 of the key portion 15.
6 may be formed by fixing a conductive columnar member at a predetermined position.

Further , a printed wiring is provided in a section screen surrounded by the inside of each contact portion 18 having such an arrangement relation.
Has a protruding length that can always contact the opposing plate surface 23 of the plate 22
A fulcrum 19 is provided.

This will be specifically described with reference to FIG.
The fulcrum part 19 is a hemispherical shape at the center of the center of the ward screen.
A main fulcrum portion 19a provided and provided;
And a gap 2 on the side facing each contact 18.
A total of four approximately arranged in a substantially annular shape with 1 interposed
With the auxiliary fulcrum 19b having an arc shape, two adjacent
Opposite plate surface 23 of printed wiring board 22 of contact portions 18
It is formed to allow simultaneous contact with In addition, each contact
Protrusion of these contact portions 18 adjacent to the inside of the point portion 18
A preliminary fulcrum 19c having a projection length equal to
You can also.

Since the present invention is constructed as described above, the key provided on the bottom surface 16 of the key portion 15
By pressing the upper surface 20 at a position corresponding to the position of each of the contact portions 18, the key portion 15 is tilted while being supported by the fulcrum portion 19 composed of the main fulcrum portion 19a and the auxiliary fulcrum portion 19b, and pressed down. Since the contact portion 18 located on the specified side can be brought into contact with the opposing plate surface 23 of the printed wiring board 22, the cursor can be moved in a fixed direction defined by the contact portion 18.

Further, by pressing the upper surface 20 at a position corresponding to an intermediate position between two adjacent contact portions 18, 18, the main support is formed.
The key portion 15 is tilted while being supported by a fulcrum portion 19 composed of a point portion 19a and an auxiliary fulcrum portion 19b, and the two contact portions 18, 18 located on the depressed side are respectively opposed to the opposing plate surfaces of the printed wiring board 22. 23, 23, so that these two contact portions 1
The directions of movement of the cursor defined by 8 and 18 are combined, and the cursor can be moved in a predetermined diagonal direction.

Further , the fulcrum 19 is in contact with the main fulcrum 19a.
The key portion 15 is formed by the auxiliary fulcrum portion 19b.
Even if you push the central part of the surface 20 of
Any one of the contact portions 18 is opposed to the surface of the printed wiring board 22.
Ensure that you do not accidentally touch 23
Can be.

In addition, the key unit 1 is unknowingly or consciously.
5, even when the surface 20 is lightly touched,
9a and the auxiliary fulcrum 19b form a fulcrum 19
Therefore, the contact portion 18 and the opposing plate of the printed wiring board 22
It is possible to prevent the surface 23 from easily contacting.
Can move the cursor more reliably.
it can. Note that a spare fulcrum 19c is also provided as shown in the illustrated example.
The operation is more reliable
be able to.

Next, the direction of movement of the cursor will be specifically described with reference to FIG. 3 in relation to the position where the upper surface 20 of the key portion 15 is pressed. If the position shown in FIG. The cursor can be moved downward by pressing the position, leftward by pressing the position, and rightward by pressing the position.

When the cursor is to be moved in an oblique direction, the direction of pressing the position is synthesized with the direction of the pressing, and the direction of pressing the position of diagonally to the upper right is combined with the direction. Is synthesized and diagonally to the lower left,
When the position is pressed, the direction is combined with the direction, and the position is combined diagonally to the upper left, and when the position is pressed, the direction is combined, and the direction is diagonally moved to the lower right.

[0027]

As described above, according to the present invention, the operator pushes down the upper surface corresponding to any one of the four contact portions provided on the bottom surface of the key portion with a finger,
The cursor can be moved in any desired direction by a single operation of pressing down the upper surface corresponding to the intermediate position between two adjacent contact points, so that the operation of moving the cursor can be simplified.

Further, since only one key portion is required for moving the cursor, a limited space can be effectively used.

Further, the fulcrum is composed of a main fulcrum and an auxiliary fulcrum.
So that even if you press the center part of the key part
One of the contacts is incorrectly placed on the opposite surface of the printed circuit board.
Contact can be reliably prevented. Furthermore, nothing
When touching the key part consciously or consciously
However, the contact part and the opposite plate surface of the printed wiring board can be easily
Cursor can be prevented from contacting
Can be performed more reliably.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 Shows the bottom shape for one embodiment of the invention
FIG.

FIG. 3 is an explanatory diagram showing a relationship between a pressing position of a rubber contact key and a moving direction of a cursor in the present invention.

FIG. 4 is a plan view showing an example of an arrangement state of a conventional rubber contact key.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 Rubber contact key 12 Sheet portion 13 Boundary edge 14 Stand-up portion 15 Key portion 16 Bottom surface 17 Peripheral edge 18 Contact portion 19 Support point portion 19a Main support portion 19b Auxiliary support portion 19c Spare support portion 20 Top surface 21 Gap portion 22 Printed wiring board 23 Opposite Board surface

Claims (1)

(57) [Scope of request for utility model registration] 1. A is composed of a sheet portion to be placed on a printed wiring board, a key part of the automatic restoring force is lifted granted by the rising portion which is interposed between said seat portion
Is, on the bottom surface of the key section, distribution so as to be separated from the opposite plate surfaces of the printed wiring board at a distance to the front, rear, left and right directions
And a total of four contact portions which are location, enclosed at the inside of the contact portion
The opposing board surface of the printed wiring board located in the screen
And a fulcrum arranged so as to always contact
In the rubber contact key, the fulcrum portion is provided at a central portion of the center of the ward screen.
Between the fulcrum and the main fulcrum and each contact
It is arranged in a substantially annular shape with a gap on the opposite side
Adjacent to each other with a total of four auxiliary fulcrum parts having a substantially arc shape
Simultaneous contact of two contact points on opposing board surface of printed wiring board
Rubber contact key structure characterized by being formed freely .