KR100888237B1 - Pointing device and electronic device including the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointing device and an electronic device having the same, and more particularly to a pointing device having a dome spring with protrusions to maintain a uniform click feeling, and an electronic device including the same. The present invention can maintain the same click feeling irrespective of the movement of the operation member by using the dome switch having the projection.

Pointing device, electronic device, dome spring, protrusion, click feeling

Description

POINTING DEVICE AND ELECTRONIC DEVICE HAVING THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointing device and an electronic device having the same, and more particularly to a pointing device having a dome spring with protrusions to maintain a uniform click feeling, and an electronic device including the same.

In recent years, electronic devices have become smaller and smaller, and the operation of the electronic devices is made easier by using a Graphic User Interface (GUI) method. Various input devices such as a mouse or a touch pad are used to control the movement of the pointer of the graphical user interface. Recently, an input device for controlling the movement of the pointer on the screen by detecting the two-dimensional movement of the magnet by using a sensor for detecting the direction and strength of the magnet. This pointing device provided a silicone rubber on a substrate, arranged a magnet with an operating member on top of the silicone rubber, and attached a sensor to the bottom of the substrate. At this time, when the operating member is moved by the user, the magnet is also moved together, the silicon rubber also moves in the vertical, left, and right directions when the magnet moves. In addition, when the magnet does not move, the magnet is restored to the initial position due to the elastic force of the rubber. However, in the conventional case, the elasticity of the rubber alone does not allow the user to feel the click, and even when the dome switch is used instead of the rubber, the position where the pressure is applied to the dome switch according to the movement of the operating member is different, so the click feeling is different according to the position of the operating member. There is this.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a pointing device capable of maintaining the same click feeling regardless of the movement of the operating member and an electronic device including the same.

The present invention to achieve the above object is an operating member moving by the user; An intermediate member connected to the operating member to impart a restoring force to the operating member; A dome spring integrally formed with the intermediate member at a lower portion of the intermediate member, the dome shape protruding downward, and having a protrusion formed thereon; And sensing means for sensing the movement of the operation member and outputting an electrical signal.

In this case, the intermediate member may have a pattern portion of a pivot shape for imparting a restoring force to the operating member. However, the present invention is not limited thereto, and the intermediate member may be provided with a plurality of elastic portions having a straight line shape having elasticity to impart restoring force to the operating member.

In addition, the protrusion is preferably formed in the center of the dome spring, the protrusion may be formed integrally with the dome spring. Of course, the protrusion may be attached and manufactured separately from the dome spring. At this time, the area of the projection is formed so that the projection and the center region of the intermediate member when the operating member is moved, it is preferable that the height of the projection is formed so that the projection and the intermediate member is spaced apart. The sensing means may comprise a magnetic sensor.

The present invention also provides a control unit for processing data; A screen display for displaying an image; And a pointing device for outputting a signal for moving a pointer in the screen display unit, wherein the pointing device includes an operating member moved by a user and an intermediate member connected to the operating member to impart a restoring force to the operating member; An electronic device comprising a dome spring formed integrally with the intermediate member and protruding downward from the intermediate member, the dome spring having protrusions, and sensing means for detecting the movement of the operating member and outputting an electrical signal. to provide.

As described above, the present invention can maintain the same click feeling irrespective of the movement of the operation member by using the dome switch in which the protrusion is formed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you. Like reference numerals in the drawings refer to like elements.

1 is a schematic cross-sectional view of a pointing device according to a first embodiment of the present invention, FIG. 2 is a plan view of an intermediate member according to the first embodiment of the present invention, and FIGS. 3 to 5 are modified according to a modification of the present invention. 6 is a schematic cross-sectional view for explaining the operation of the pointing device according to the first embodiment of the present invention, Figure 7 is a view showing the operation of the pointing device according to the prior art and the pointing device according to the present invention It is a schematic sectional drawing for comparison.

The pointing device according to the first embodiment of the present invention, as shown in Figures 1 and 2, the magnet 100 provided on one side of the substrate 100, and through the movement by the user The operation member 400 for moving the magnet part 300, the intermediate member 200 for moving and restoring the magnet part 300 and the operation member 400, and the magnetic field according to the movement of the magnet part 300. The sensor unit 600 detects a change and generates a predetermined output signal, and a dome spring 110 to give a click feeling when the user moves the operation member 400.

Here, as the board | substrate 100, it is preferable to use a printed circuit board. The shape of the substrate 100 may be modified into various shapes according to the electronic device to which the pointing device is applied. In addition, although not shown, one side of the substrate 100 is provided with a signal output unit to be connected to an external system. Of course, when the main board in the electronic device is used as the substrate 100 of the present embodiment, it can be omitted as necessary.

The dome spring 110 is to give a click feeling when the user presses the operation member 400, and is preferably located between the substrate 100 and the operation member 400. In this embodiment, the dome spring 110 is formed on the substrate 100 so that the dome spring 110 is positioned between the substrate 100 and the operation member 400. In addition, the dome spring 110 has a protrusion 112 formed thereon. The protrusion 112 is effectively formed in the center of the dome spring 110 to maintain the same feeling of click even if the position of the intermediate member 200 is changed. In this embodiment, the protrusion 112 is manufactured separately and attached to the upper portion of the dome spring 110, but is not limited thereto. The dome spring 110 and the protrusion 112 may be integrally manufactured. For example, when the dome spring 110 is manufactured in a dome shape, the protrusion 112 may be formed by allowing the upper region of the dome to protrude.

In addition, the protrusion 112 is formed to protrude so as to have a predetermined height in the center of the dome spring 110, the protrusion 112 is preferably formed so as not to contact the intermediate member. In addition, the area of the protrusion 112 should be formed so that the end of the coupling portion can press the protrusion 112 when the intermediate member is moved to the maximum. Of course, it is also possible to adjust the movement width of the intermediate member so that the end of the coupling portion can press the protrusion 112.

In the present exemplary embodiment, one protrusion 112 is formed on the upper portion of the dome spring, but the present invention is not limited thereto. As shown in FIG. 3, the first and second protrusions 112a, Two protrusions 112 (ie, 112b), that is, a strip-shaped protrusion 112 may be formed based on the plan view. In this case, since the area is wider than when the protrusion 112 is one, the coupling portion may press the protrusion 112 even if the moving width of the intermediate member is large. Therefore, even if the movement width of the intermediate member is large, the same click feeling can be maintained.

As described above, the pointing device according to the present embodiment forms a protrusion 112 at the center of the dome spring 110 to move the operation member 400 and then clicks the protrusion 112 to move the dome spring 110. It is effective to press the center. Therefore, the same click feeling can be maintained regardless of the movement of the operation member 400.

Of course, in the present embodiment, the dome spring 110 is used to give a click feeling, but the present invention is not limited thereto, and various types of springs may be used. It is preferable to use springs which have a feeling of clicking and which automatically return after pressing the spring.

The intermediate member 200 is manufactured in a thin plate shape having a pivot pattern portion 220. Of course, the plate shape may be circular, polygonal and elliptical based on the top view.

In addition, as shown in FIG. 2, the intermediate member 200 includes a coupling part 210 provided at the center of the plate and a fixing part 230 provided at the edge of the plate. The coupling part 210 is manufactured in a substantially plate shape, and the fixing part 230 is manufactured in a band shape. In this case, the pattern portion 220 is provided in an area between the coupling portion 210 and the fixing portion 230, and the line having the same thickness as the coupling portion 210 and the fixing portion 230 is patterned in a pivot shape. do. That is, one end of the line is connected to the engaging portion 210, the line is rotated along the outer periphery of the engaging portion 210 with the region connected to the engaging portion 210 as a starting point, the radius of rotation gradually increases Make a rotation. The other end of the line is connected to the fixing part 230. Here, the coupling portion 210, the pattern portion 220 and the fixing portion 230 is preferably made of a single body. At this time, it is effective to use a metal or plastic as the body. The pattern unit 220 of the above-described intermediate member 200 may be manufactured through a mold process or may be manufactured through perforation on a thin thin film plate to mass produce at a low cost. Of course, the pattern portion 220 may be formed by removing a portion of the thin thin film plate through etching. Of course, the present invention is not limited thereto, and the coupling part 210, the pattern part 220, and the fixing part 230 may be manufactured in different bodies, and they may be combined by welding or adhesive. Here, it is effective to form the thickness of the intermediate member 200 to be thin so that it can be easily deformed and restored again by an external force.

In addition, the fixing part 230 of the intermediate member 200 is fixed on the substrate 100 by the mold frame 500 or the case 501. As illustrated in FIG. 1, the mold frame 500 may be manufactured to have a band shape to wrap a portion around the edge of the fixing part 230 of the intermediate member 200. The mold frame 500 is preferably formed on the substrate 100 through an adhesive or fixing means. Here, a fixing protrusion 112 is provided in the mold frame 500, and a through hole (not shown) is provided in the fixing part 230 of the intermediate member 200, and the inside of the fixing hole 230 is provided. Since the fixing protrusion 112 of the mold frame 500 is inserted into and fixed to the substrate 100, the intermediate member 200 may be fixed onto the substrate 100. Of course, it is possible to manufacture in the opposite shape. In addition, a predetermined fixing groove or fixing protrusion 112 is provided at one side of the fixing part 230, and the intermediate member 200 is provided with a fixing protrusion 112 or fixing groove corresponding thereto. 200) may be fixed. Of course, the present invention is not limited thereto, and the intermediate member 200 may be fixed by various fixing methods. That is, the intermediate member 200 and the mold frame 500 may be simultaneously fixed onto the substrate 100 through a fixing member such as a separate bolt.

In addition, as shown in the modification of FIG. 4, the intermediate member 200 may be fixed by a case 501 for limiting the movement of the operation member 400. In addition, as shown in the modification of FIG. 5, the intermediate member 200 may be fixed by a plate-shaped mold frame 500 provided on the substrate 100.

In the above-described embodiments and modifications, the intermediate member 200 is disposed to be spaced apart from the substrate 100 by the dome spring 110 of the substrate 100. However, when the lower dome spring 110 is not located, the intermediate member 200 may be located directly on the upper surface of the substrate 100 although not shown. A lubrication member may be provided between the substrate 100 and the intermediate member 200 to smoothly move the intermediate member 200. Alternatively, a predetermined accommodation groove (not shown) may be provided in the substrate 100 to accommodate the intermediate member 200.

The magnet part 300 and / or a part of the operation member 300 are fixedly coupled to the coupling part 210 of the intermediate member 200.

The magnet part 300 is disposed in the central region of the coupling part 210 of the intermediate member 200. A square magnet magnetized up and down by the magnet part 300 is used. Of course, the present invention is not limited thereto, and a magnet in which a single-sided multipole (two-pole, four-pole, eight-pole) magnetization or a cross-sectional release multipolar magnetization is performed may be used. Of course, the magnet of circular, oval, circular band and polygonal shape may be used as the magnet. The magnet part 300 may be attached to the coupling part 210 of the intermediate member 200 through an adhesive member. Of course, the present invention is not limited thereto, and the coupling part 210 of the intermediate member 200 may have a concave groove, and the magnet part 300 may be disposed in the concave groove.

In addition, an operation member 400 having a shape surrounding the magnet part 300 is disposed on the magnet part 300. The operation member 400 is provided in a columnar shape having a concave groove therein as shown in FIG. 1. At this time, the magnet part 300 is disposed inside the concave groove of the pillar. Here, a part of the operating member 400 may overlap the coupling portion 210 of the intermediate member 200, and the intermediate member 200 and the operating member 400 of the overlapping area may be bonded through an adhesive member. have. As a result, when the operation member 400 moves by a force applied from the outside, the intermediate member 200 and the magnet part 300 may be moved together in the direction of the force. In addition, as described above, when the magnet part 300 is attached to the intermediate member 200, the force of the operation member 400 is applied to the magnet part 300, and is applied to the force applied to the magnet part 300. The intermediate member 200 is moved by this. Of course, the present invention is not limited thereto, and as shown in the modification of FIG. 2, the magnet part 300 may be disposed in an inner region of the operating member 400, and a part of the body of the operating member 400 may extend in the lateral direction. The separation can be prevented by the case 501. In addition, a part of the body of the operation member 400 is protruded in the upward direction to facilitate the application of the user's force, it is possible to improve the operation feeling. In addition, the magnet portion 300 may be attached to the lower surface of the coupling portion 210 of the intermediate member 200, the operation member 400 is formed in the inverted truncated horn shape, the lower portion of the truncated horn coupling portion of a small size 210 may be formed in a corresponding size, and the upper portion may be manufactured in sufficient size to improve a user's operation feeling.

In addition, a magnetic field blocking member may be provided above the magnet part 300 to prevent the magnetic field of the magnet part 300 from spreading outside the pointing device. Here, as shown in FIG. 3, when the magnet part 300 is disposed on the lower surface of the intermediate member 200, the magnetic field blocking member may be omitted when the metallic thin plate is used as the intermediate member 200. Also, in the present embodiment, the magnet part 300 may be omitted depending on the sensor used in the pointing device.

The lower side area of the substrate 100 is provided with a sensor unit 600 for detecting a change in the magnetic field according to the movement of the magnet portion 300. The sensor unit 600 detects a magnetic field change according to the movement of the magnet unit 300 in the X axis direction and outputs an X coordinate value corresponding thereto, and detects the magnetic field change according to the movement in the Y axis direction. It includes a magnetic sensor for outputting a corresponding Y coordinate value. In addition, a control unit (not shown) which amplifies the output of the magnetic sensor, aggregates, and detects and outputs a change in the final magnetic field.

Preferably, a plurality of magnetic sensors are arranged to be symmetrical with each other in the center point region of the circular magnet. As in the modification of Fig. 3, it is effective to arrange the magnetic sensor in the center area of the substrate.

This reduces the overall size of the pointing device and improves the sensitivity of the magnetic sensor. As the magnetic sensor described above, it is preferable to use any one of a Hall element, a semiconductor magnetoresistive element, a potato magnetoresistive element, and a Giant Magneto Resistive (GMR) element. It is preferable to use an element in which such a magnetic sensor changes its electrical characteristics in response to a change in the magnetic field. In this embodiment, a magnetic element uses a Hall element whose output voltage changes in proportion to the magnetic flux density.

Referring to the operation of the pointing device of the present embodiment having the above-described structure is as follows.

The magnet 300 inside the pointing device is normally positioned at an initial setting position by the intermediate member 200 as shown in FIG. 1. The initial setting position of the magnet unit 300 is preferably a center point region between the magnetic sensors of the sensor unit 600. As described above, when a force is not applied to the operation member 400 of the pointing device, the output of the sensor unit 600 outputs a reference point (0,0). As a result, the position of the pointer on the screen does not change.

However, considering the case where the user presses one side of the pointing device as shown in FIG.

When the user pushes the operation member 400 in the left direction as shown in FIG. 6 (a) or the right direction as shown in FIG. 6 (b), the operation member 400 is moved in the pushing direction of the user. At this time, the magnet part 300 coupled to the operation member 400 and the coupling part 220 of the intermediate member 200 are moved in the pushing direction of the user. That is, when a force pushing in the left direction is applied as shown in FIG. 6A, the interval between the pivotal pattern portions 220 of the intermediate member 200 in the left region is reduced, and the intermediate member 200 in the right region is reduced. As the interval between the swing pattern portions 220 is increased, the coupling portion 210 of the magnet portion 300 and the intermediate member 200 moves to the left direction. The magnetic field applied to the sensor unit 600 is changed through the movement of the magnet unit 300. In addition, when a force pushing in the right direction is applied as shown in FIG. 6 (b), the pattern part 220 is extended or reduced in the opposite manner as described above, and thus the coupling part 210 of the magnet part 300 and the intermediate member 200 is extended. Will move to the right. The sensor unit 600 detects the change in the magnetic field according to the movement of the magnet unit 300 to generate a sensor output different from the initial position. The controller detects the change in the sensor output and moves the cursor on the screen in the moving direction of the magnet unit 300. In the above description, the pushing force of the user is applied in one direction, but the present invention is not limited thereto, and the pushing force of the user may be continuously changed. That is, for example, the operation member 400 may be pushed in a linear motion as well as in a rotational motion. Afterwards, when the user's pushing force disappears, the pattern unit 220 pushed to one side returns to its original position. That is, as shown in (a) of FIG. 6, the turned lines whose spacing intervals are reduced in the left region are pushed out, and the turned lines whose spacing intervals are increased in the right region are pulled together. Maintain initial spacing of broken lines. Through this, the coupling part 210 of the intermediate member 200 and the magnet part 300 provided thereon may be disposed at an initial position.

In addition, the dome spring 110 may be clicked through the intermediate member 200 according to the present embodiment. That is, as shown in FIG. 6C, when the operating member 400 is pressed in the direction of the substrate 100, the operating member 400 is lowered, and thus the coupling part 210 of the intermediate member 200 is also lowered. It descends together and presses the lower dome spring 110. At this time, the pattern portion 220 provided on the outside of the coupling portion 210 is extended by the external force. Then, when the force applied from the outside disappears, the increased pattern portion 220 is restored to its original state, and through this, the coupling portion 210 and the operation member 400 may be restored to the original position together.

Comparing the pointing device according to the present invention with the pointing device according to the prior art, the pointing device according to the prior art is an intermediate member when the intermediate member moves and presses the edge of the dome spring, as shown in FIG. Pressure is applied only to the portion of the dome spring that is in contact with the. Therefore, there is a difference in the distance that the dome spring operates when the intermediate member pushes the center of the dome spring and when the edge is pressed. Therefore, the click feeling varies according to the position where the dome spring is pressurized. However, the pointing device according to the present invention, as shown in Figure 7 (b), even if the intermediate member moves to press the edge of the dome spring, the intermediate member is to press the protrusion 112 formed in the dome spring, so that the intermediate member is a dome spring The pressure exerted on the dome spring is the same as long as the projection 112 formed in the presser is pressed. Of course, the protrusion 112 formed in the dome spring should be in contact with the intermediate member even if the intermediate member moves as much as possible. In addition, for this purpose, for example, as described above, the height, area, and size of the protrusion 112 formed on the dome spring may be adjusted.

The pointing device according to the present invention is not limited to the above description, and may further include a seating member in which a predetermined groove is provided in the center of the coupling portion of the intermediate member, a portion of which penetrates the groove, and the magnet portion is seated. .

Meanwhile, in the present exemplary embodiment, the intermediate member 200 having the pattern portion having a pivot shape is used to move and restore the magnet part 300 and the operation member 400, but is not limited thereto. For example, instead of the intermediate member 200, a media member including a central part, a plurality of elastic parts provided outside the central part, and a fixing part provided outside the elastic part may be used. In this case, when the intermediate member 200 moves, the central portion, which is a central region, and the protrusion 112 of the dome spring 110 contact with each other.

The center may be provided in a rectangular plate shape and an accommodation space in which the magnet part 300 is accommodated may be provided. Of course, the shape of the center is not limited to this, and it is possible to produce a plate shape of round, oval and polygon. In addition, the storage space may also be variously changed according to the shape of the magnet part 300. In addition, the central portion is preferably closely coupled with the operation member 400 to restore the operation member 400 to the initial position after the movement of the operation member 400. That is, the central portion deforms the elastic portion by providing the elastic portion provided on the outer side of the central portion to the movement of the operation member 400 by the user's operating force. Thereafter, after the user's operating force disappears, the restoring force of the elastic part is provided to the operating member 400 to restore the operating member 400.

In addition, a plurality of elastic parts are provided in the side outer region of the central portion. The elastic portion is preferably produced in a bent straight shape, for example. In the present embodiment, four elastic parts may be provided in the side region of the central portion having a rectangular shape. Of course, the elastic part is not limited to four, but may be larger than this, and a smaller number may be provided.

Next, a pointing device according to a second embodiment of the present invention will be described with reference to the accompanying drawings. Of the contents to be described later, the description overlapping with the first embodiment of the present invention will be omitted or briefly described. In addition, the description of the following description can be applied to the above-described embodiment.

8 is a schematic cross-sectional view of a pointing device according to a second embodiment of the present invention.

As shown in FIG. 8, the pointing device according to the second embodiment of the present invention includes a magnet part 300, an operation member 400 for moving the magnet part 300 through movement by a user, and the magnet. Intermediate member 200 for moving and restoring the unit 300 and the operation member 400, the dome spring 110 provided on the intermediate member 200, the projection 112 is formed, and the magnet portion 300 The sensor unit 600 for detecting a change in the magnetic field according to the movement of the to generate a predetermined output signal.

The intermediate member 200 is for moving and restoring the magnet part 300 and the operation member 400, and is a thin plate having a pattern part 220 having a pivot shape in the same manner as in the first embodiment of the present invention. It is manufactured in the shape.

The dome spring 110 is to give a click feeling when the user presses the operation member 400, and is preferably located between the substrate 100 and the operation member 400. Unlike the pointing device according to the first embodiment of the present invention, the pointing device according to the present embodiment has a dome spring 110 having a protrusion 112 formed under the intermediate member 200, that is, the magnet part 300. ) Is formed on the rear surface of the intermediate member 200 provided. In addition, the dome spring 110 is mounted in a direction opposite to that of the first embodiment. That is, the dome shape of the dome spring 110 is projected downward to the opposite direction of the intermediate member 200, and the dome spring 110 is coupled to or integral with the intermediate member 200 such that the protrusion 112 also faces downward. Is formed. In this case, the protrusion 112 may be formed at the center of the dome spring 110 to maintain the same feeling of click even if the position of the intermediate member 200 is changed. In this embodiment, the protrusion 112 is manufactured separately and attached to the upper portion of the dome spring 110, but is not limited thereto. The dome spring 110 and the protrusion 112 may be integrally manufactured. For example, when the dome spring 110 is manufactured in a dome shape, the protrusion 112 may be formed by allowing the upper region of the dome to protrude. Of course, the intermediate member 200 and the dome spring 110 may be manufactured in one piece. That is, for example, the intermediate member 200 and the dome spring 110 may be made of the same material and manufactured integrally.

As described above, the pointing device according to the present embodiment forms a protrusion 112 at the center of the dome spring 110 to move the operation member 400 and then clicks the protrusion 112 to move the dome spring 110. It is effective to press the center. Therefore, the same click feeling can be maintained regardless of the movement of the operation member 400.

Although described above with reference to the drawings and embodiments, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit of the invention described in the claims below. I can understand.

1 is a schematic cross-sectional view of a pointing device according to a first embodiment of the present invention.

2 is a plan view of an intermediate member according to the first embodiment of the present invention;

3 to 5 are schematic cross-sectional views of the pointing device according to a modification of the present invention.

6 is a schematic cross-sectional view for explaining the operation of the pointing device according to the first embodiment of the present invention.

7 is a schematic cross-sectional view for comparing the operation of a pointing device according to the prior art and a pointing device according to the invention.

8 is a schematic cross-sectional view of a pointing device according to a second embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: substrate 110: dome spring

112: protrusion 200: intermediate member

210: coupling portion 220: pattern portion

230: fixed portion 300: magnet portion

400: operating member 500: mold frame

Claims (10)

An actuating member moved by the user; An intermediate member connected to the operating member to impart a restoring force to the operating member; A dome spring provided below the intermediate member, the dome shape protruding downward, and having protrusions; And And sensing means for sensing the movement of the operating member and outputting an electrical signal. The method according to claim 1, And the intermediate member has a pivot-shaped pattern portion for imparting restoring force to the actuating member. The method according to claim 1, The intermediate member is provided with a plurality of elastic portion of the bent straight shape having an elastic force to give a restoring force to the operating member. The method according to claim 1, The projection is a pointing device, characterized in that formed in the center of the dome spring. The method according to claim 4, Pointing device characterized in that the projection is formed integrally with the dome spring. The method according to claim 5, The projection is characterized in that the pointing device is manufactured separately from the dome spring. The method according to claim 6, The area of the projection is a pointing device, characterized in that formed so that the projection and the center region of the intermediate member in contact with the movement of the operating member. The method according to claim 7, The height of the projection is a pointing device, characterized in that formed so that the projection and the intermediate member is spaced apart. The method according to claim 1, And said sensing means comprises a magnetic sensor. A controller for processing data; A screen display for displaying an image; And A pointing device for outputting a signal for moving a pointer in the screen display unit; The pointing device is formed integrally with the intermediate member at the lower portion of the intermediate member and the intermediate member connected to the operating member and the operating member to impart a restoring force to the operating member and the intermediate member, and the dome shape projects downward. And sensing means for outputting an electrical signal by sensing a movement of the dome spring and the operating member on which is formed.

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