Mouse for data entry and control with optimized ball height

Abstract: A mouse system is provided wherein a roller ball is received and supported within a ball retaining assembly. A vertical height of the ball is adjusted relative to the housing by adjusting a vertical height of the ball assembly relative to the housing. By changing vertical height of the ball relative to a top surface of the housing having an aperture through which the ball protrudes, a selectable portion of the ball will protrude through the aperture. Thus, an operator may make height adjustments of the ball relative to the top housing surface to suit his individual preference.

Description: BACKGROUND OF THE INVENTION The present invention relates to a mouse used for data entry into a computer system. A keyboard is normally used to enter data manually into a computer system. These keyboards can be made in many different versions. However, they are all designed around the same basic concept: the keyboard contains groups of "Keys", each assigned to a specific letter or number, or one or more signs. Additionally, most modern keyboards for data systems also contain a series of function keys. Each function key may activate a special operation, depending upon the program being executed in the computer. To simplify operations, many data systems and computer programs are also designed to work with a "Mouse" in addition to the keyboard. Although these mice may take many forms, their basic functions are the same: a unit containing a ball and one or more keys which may be pressed down. Two types of ball systems exist, as described hereafter. In the first type, the ball is mounted on the bottom side of the mouse housing. Moving the mouse by rolling the mouse housing along a table will make the ball roll. This rolling ball operation is transferred to a corresponding movement of the cursor on the data screen of the connected computer. The ball operating can be translated into a distance and direction moved along an x-axis and a distance and direction moved along a y-axis. This movement is then transferred to the computer which moves the cursor on the screen in directions and distance corresponding to those given by the mouse movement. In most programs the relationship between a given rolling distance of the mouse ball and the corresponding movement of the cursor can be programmed, and also the acceleration of the mouse operation can be programmed. The second type of mouse design differs, since the ball is on the top of the mouse housing. Again the mouse housing can be moved, but the basic operation is performed by having the mouse rest fairly permanently. The ball is moved by rolling it with the hand. This again will correspond to a movement of the cursor as described above. This second type of mouse was previously often referred to as a "Trackball." These days, the word mouse is more commonly used also for this type, and will therefore be used in the rest of this text. Both mouse designs therefore operate the cursor in the same way, the difference between the designs being related to the movement of the ball. Both versions typically have one or more keys 6, 7 as shown in Figure 2, or 8, 9 as shown in Figure 4, which the operator may activate in addition to the operation of the ball. Depending upon the computer program, the operation of the ball together with the pressing of one or more keys will create specified operations or reactions by the computer program. Although mouse operations may increase an operator's efficiency, the mouse also poses some problems. Mice designed to be moved along a table (roller ball on bottom), may require a fairly substantial table area. In some computer areas, this may cause problems. Also, the operator has to move his or her arm away from the keyboard area, which may slow down the overall efficiency and create muscle problems. The other mouse type with the roller ball on the top does not require a large additional table area for its operation. However, because the operator's hand shall control both the rolling of the ball and the keys directly, the design of the ball and the housing around the ball is very critical. As the human hand varies fairly much, this may cause some problems. Figures 1 and 2 show at 10 a typical mouse design with a ball 11 on the under side of a mouse housing 12. For simplicity, this is referred to as "Type 1" in the following text. Figures 3 and 4 show a mouse 13 with a ball 14 on the top side of a housing 15. This will be referred to as "Type 2" in the following text. When the ball on a mouse of type 2 is rolled by the hand of the operator, the ball movement is transferred to an "x-" and a "y-" control system internally in the mouse housing. Although this control system may vary in design, the basic principle is to register the movement of the ball on an x and y axis. Typically the ball 19 is touching three or four rollers, such as shown in Figure 5 at 16, 17, and 18, where one or two are freerolling (such as 18) and the other two (such as 16 and 17) are connected to systems via measuring devices 20 or 21 for detecting the direction of the revolution of the roller and the length of rolling, as shown in Figure 3. One of these detection rollers is referred to as the x-axis controller 16, the other one (90 degrees off the x-axis roller 16) is referred to as the y-axis controller 11. The free roller is shown at 18 (see Figure 3). The two rollers 16 and 17 work independently. The direction and movement of the x- and y-controllers are transferred to the cursor on the data screen of the connected data system. Most programs permit the ratio between the movement of the ball in the x-direction and the y-direction, and the corresponding movement of the cursor in the same directions, to be set to suit the specific taste and requirements of the operator. The type 1 mouse operates in the same way, except that the ball is on the bottom side and the ball is rolling by moving the mouse along the table. The extra mouse keys such as 6, 7 or 8, 9 which may be pressed down by the operator are used to mark special cursor locations, start and stop of a cursor movement, etc. This will vary depending upon the program being run. Typically, a mouse may have two or three keys in addition to the ball. More than three keys are normally not practical. SUMMARY OF THE INVENTION Although a mouse in many applications is an effective tool, it is important that the mouse system is designed ergonomically to ease operator fatigue and increase operator's efficiency. The problem is that it is very difficult to set up exact design rules for design of a mouse so that it fits most operators. The human hand varies fairly much, and what may be good for one operator may not fit another one. Therefore, many different mouse designs exist, each trying to meet as large a possible a group of typical operators. The Japanese Abstract of JP-A 30 55 622 describes a mouse system of the first type which is designed to facilitate the application by changing the height of a main body part of the mouse to accommodate to different users. This arrangement, however, can not satisfy the demands for a mouse of type 2, for which it had turned out that the height of the housing itself is not the relevant parameter for the operators best working with that mouse. It is an object of the present invention to provide a mouse having a means for adjusting the mouse ball for optimum height for each operator who uses the mouse without leaving from that feature of reliable operation that the sensitive parts of the mouse ball are dust-protected and encapsulated in the housing. This invention makes it easier to adapt a mouse of type 2 to the particular need of an operator by make it possible to adjust the height of the ball above the mouse housing. According to the invention, a mouse system is provided, where the vertical height of the ball assembly is adjustable in convenient fashion, by an operator of the mouse, as defined in claim 1 Preferred embodiments are subject matter of the subclaims. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side view of a prior art mouse system of a so-called "type 1" wherein the ball is on the bottom of a housing of the mouse system; Figure 2 is a perspective view of the mouse system shown in Figure 1; Figure 3 is a side view of a so-called "type 2" prior art mouse system where the roller ball is on a top of the housing of the mouse system; Figure 4 is a perspective view of the type 2 mouse system shown in Figure 3; Figure 5 is a side schematic illustration of internal rollers in contact with the ball of a mouse system according to the prior art; Figure 6 is a cross sectional view of a side of a mouse system having a ball which is movable up and down in accordance with the invention; Figure 7 is a side cross sectional view of an embodiment of a mechanism for moving the ball up and down according to the invention; Figure 8 is a partial cross sectional view from the side showing additional mechanisms for use with the ball raising and lowering mechanism of Figure 7; Figure 9 is an alternate embodiment of a mechanism for raising and lowering the mechanism shown in Figure 7; Figure 10 is a further embodiment of a mechanism for raising and lowering the mechanism of Figure 7; and Figure 11 is a cross sectional view showing a mouse housing having a snap-on cover with an aperture size dimensioned for a close fit to a ball which protrudes therethrough so that depending upon a height of adjustment of the ball, there is a close match between the cover and the ball where the ball protrudes therethrough. DESCRIPTION OF THE PREFERRED EMBODIMENTS The principle of the invention is shown in Figure 6. A type 2 mouse will be used as a basis for the description. A fairly large ball 24 is mounted in a mouse housing 22 by use of a ball assembly 23 supporting the ball 24 at aperture 25 in ways well known in the prior art. For simplicity, the rollers carrying the ball are not shown in the Figures. Instead of being a fixed system, as used in designs today, this new invention is based on the entire ball assembly 23, including rollers, etc., being movable up or down along the vertical axis as shown by the double arrows. This will have the effect of increasing (ball higher up) or decreasing the size of the ball above the top cover or surface 22a of the mouse housing 22. Thus, the portion of the top of the ball 24 which extends through aperture 26 is controllable. Each operator may therefore adjust the ball to fit his or her taste. This vertical movement of the whole ball assembly 23 may be achieved in many ways. One implementation is based on the ball assembly 34 riding up or down along one or more guides 35, 36 in the vertical direction. The guides are positioned in said channels 37 and 38 in widened portions 40, 41 (see Figure 7). The guides 35, 36 may be guiding the assembly on the outside or inside (as shown) of the assembly. The position of the ball assembly along the guides may be controlled by several different methods. A simple screw system is shown in Figure 8, or a wheel screwed on one of the guides as shown in Figure 9, or an arm or lever which is pivoting around a fixed point as shown in Figure 10. More specifically, as shown in Figure 8, the ball assembly is pre-loaded by a spring 48 encircling the guide pin 46 attached to a floor of the housing 42. This guide pin is received within a guide channel 49 in the ball assembly 45. Additionally, another guide pin 47 may be provided which is attached to a floor of the housing and is received in guide channel 50. The base of the housing 42 may have feet 43 and 44. A pocket 80 is provided having a screw thread aperture 52 which engages with threads of an adjustment screw 51, a head of which is received in the pocket 80. The top end of the screw 51 has a narrowed portion 54 received within an aperture 55 of the assembly 45. A head 53 is provided at an end of the narrow portion 54 for holding the assembly to the screw. In Figure 9 the ball assembly is also pre-loaded, in this case by a spring 63 received around a guide pin 57 within the assembly 65. An adjusting screw 58 is provided on threads 59 on the guide pin 57. Both the guide pins 57 and 60 are attached to a floor of the housing 56. These guide pins are received in respective guide channels 61 and 62 of the assembly 65. The spring 63 has its one end abutting against a stop member 64 and its other bottom end abutting against an internal portion of the housing 65 as shown. By turning the adjustment wheel 58, the ball assembly height is adjustable. In Figure 10, the assembly is again pre-loaded by a spring 73 whose upper end abuts against a stop 74 and whose lower end abuts against an inside portion of the assembly 75. Again, guide pins 67 and 68 are provided on the housing 66 and are received in respective channels 71 and 72. A lever 69 pivoting about a pivot point 76 on a fulcrum 70 has its end 81 acting against a bottom surface 82 of the assembly 75. A means is provided for locking the lever in different positions between the top and the bottom position, such as locking nuts at 76 or other well known prior art techniques. The basic mouse housing must have an opening on the top which is large enough to allow the ball to move all the way to the top position. Therefore, when the ball is positioned below the highest point, an opening will exist between the ball and the mouse housing. To solve this problem, the invention as shown in Figure 11 also includes special covers 75 which may be snapped on at 77 to the top of the mouse housing bottom portion 76. Each cover has a different sized opening 78 for the ball 79, so that it is possible to avoid a large opening between the ball 79 and the mouse housing 76, 75. It is also possible to have the snap-on top covers designed with different forms to better fit a specific operator's hand. The top covers 75 may be contoured differently, so that each operator may find a top which is optimized for his or her hand. This invention will allow the operator to adjust the size of the ball area touching the operator's hand. Some people prefer a very large ball, some a small one. The snap-on covers will ensure that there is no excessive opening between the ball and the mouse housing. The covers may also offer different contour designs to be better optimized for a specific operator's hand.

Claims: A mouse system, comprising a housing (22) having a top surface (22a) with an aperture therein, a ball assembly means (23) for retaining a mouse roller ball (24) with associated roll sensing means, characterized in that adjusting means are provided for setting a vertical height of the ball assembly means relative to the housing (22) such that a desired portion of the ball (24) protrudes through the top surface aperture (26) based on the vertical height setting, that the ball assembly means (23) has at least one guide channel (40, 41; 49, 50; 60, 62; 71, 72) in which a respective guide pin (37, 38; 46, 47; 57, 60; 67, 68) which projects upwardly from the floor of the housing (22) is received, and that at least one spring (48, 63, 73) is provided biasing said ball assembly means (23) with respect to said housing (22) and that the adjusting means comprises one adjusting member (51, 58, 69) acting against the biasing force and capable to be fixed in a desired vertical height. A system according to claim 1, characterized in that said adjusting member is a screw means (51) which engages with both the ball assembly means (23) and the housing (22) such that as the screw (51) is turned, a vertical height of the ball assembly means (23) is changed relative to the housing (22). A system according to claim 1, characterized in that a spring means (48) is introduced between the floor (42) of the housing (22) and the bottom of the ball assembly means (45). A system according to claims 1 or 3, characterized in that the floor (42) of the housing has first and second guide pins (46, 47) thereon, at least one of the two guide pins (46, 47) being encircled by one of said springs (48), the ball assembly means (45) has respective guide channels (49, 50) for slidably receiving ends of the guide pins (46, 47), and a screw means (51) having one end engaging with the ball assembly means (45) and the other end threadably engaging with the floor (42) of the housing such that as the screw (51) turns, the ball assembly means (5) moves vertically. A system according to claim 1, characterized in that it comprises a guide pin (57, 67) which projects upwardly from the floor of the housing, and said adjusting member (58, 69) is provided on the guide pin on which the ball assembly means rests. A system according to claim 5, characterized in that a spring (63, 73) encircles an upper end of the guide pin (57, 67), a top end of the spring (63, 73) abutting against a stop member (64, 74) and a bottom end of the spring (63, 73) abutting against an inner portion of the ball assembly means (65, 45). A system according to claim 1, characterized in that the adjusting member is a lever (69) for raising and lowering the ball assembly means (65) relative to the housing. A system according to anyone of the preceeding claims, characterized in that the housing comprises a base portion (76) and a removable cover (75) mateable with the base portion, said cover having said aperture through which the ball (79) projects, and wherein a diameter of the aperture is selected to accomodate the ball for a given height adjustment of the ball relative to the housing. A system according to claim 8, characterized in that a plurality of removable covers is provided for the housing, each of which has a different aperture diameter corresponding to different vertical heights of the ball assembly means. A system according to claim 8 or 9, characterized in that the removable covers have snap-on means for engaging with a base portion of the housing.

Inventors: SOLHJELL ERIK, SOLHJELL, ERIK
Applicants: TANDBERG DATA, TANDBERG DATA A/S
Application year: 1991
Main classification: G06K11
IPC codes: G06F3