CONTROL DEVICE FOR POINTING

Abstract: Control device comprising a rotatable and translatable bar, for control of a pointing device such as a mouse or mouse-pen associated with the control device. A key for click function is present. Adjustment possibility for different types of pointing devices may be provided for. Means for reducing bearing friction are shown.

Description: CONTROL DEVICE FOR POINTING Technical area Control device comprising a rotatable and translatable bar, for control of a pointing device such as a mouse or mouse-pen, associated with the control device. A key for click function is present. Adjustment possibility for diffe¬ rent types of pointing devices may be provided for. Means for reducing be¬ aring friction are shown. Prior art The mouse is the most common pointing device for computers and is very well known. Movement of the mouse on the desk brings often about a cor¬ responding movement of a so-called cursor on the computer ' s screen, be¬ low denominated pointing function. When a key on the mouse is depressed, another function is obtained, below denominated click function; mostly bringing about that some computer activity is triggered. Which kind of ac¬ tivity being triggered depends mostly on where on the screen the cursor is placed. The mouse has first and foremost the disadvantage that the user is forced to move a hand away from the keyboard when using the mouse, which is time-consuming. The frequent movement of the arm between the keyboard and mouse can give rise to so-called carpal tunnel syndrome, an over-strain. Furthermore, the mouse requires considerable space on the desk. Another solution is the mouse-pen, which resembles a pencil. The mouse- pen has in principle the same disadvantages as the mouse for point and click-work at the screen. A known solution eliminating the disadvantages mentioned above, is provi¬ sion of a bar which is translatable along and rotatable about its longitudinal axis, and often placed in parallel with and below the spacebar. Rotation of the bar moves the cursor in the vertical direction, and translational side¬ ways movement of the bar moves the cursor sideways on the screen. Such a solution allows, first and foremost, the cursor to move fast and react im¬ mediately, thanks to the fact that the thumbs can cooperate easily when manipulating the bar, and that no hand need be moved away from the key¬ board. For certain computer programs, where shift between the keyboard and the pointing device seldom occurs, the mouse or mouse-pen may be preferred. Heretofore known solutions comprising a translatable and rotatable bar, do not permit the user to easily change between the bar and mouse according to one's own choice. US pat. 4,71 2, 101 and US pat. 4,928,093 are repre¬ sentative to such solutions. US pat. 5J 1 5,231 shows a sphere, such as the ball in the mouse, rolling on a rotatable and sideways slideable bar. However, the construction features and advantages associated with the present invention are not shown. Summary of the invention A device according to the present invention, below denominated barcon- troldevice, is based on the translatable and rotatable bar concept, but brings about new advantages, as an accessory to pointing devices such as mouse or mouse-pen. Users that already have a mouse or mouse-pen, can at any time get a barcontroldevice, place the mouse or mouse-pen on the barcontroldevice and exploit the advantages described above. The mouse or mouse-pen can thereafter be lifted away easily and used in the conventio¬ nal manner, for example for drawing work, for which the mouse or mouse- pen may be considered have advantages, and thereafter be placed on the barcontroldevice again. Hence, both the particular advantages of the bar¬ controldevice and the mouse can be exploited with a device according to the present invention. The barcontroldevice is furthermore due to its con¬ cept as an accessory to pointing devices, totally mechanical and lacks therefore electronics, giving advantages in terms of low manufacturing costs. In one embodiment the bar is slideable, preferably in combination with friction reduction by magnetic means. In a preferred embodiment, balls are utilized for low friction support. The barcontroldevice can be utilized in connection with a mouse, mouse- pen or the like, even if the term "mouse" generally is used in the descrip¬ tion below for the sake of simplicity. There are further no limitation to use solely in connection with computers. The barcontroldevice consists primarily of the following parts: a holder on which a mouse can be placed. The holder is adjustable and is adjusted once and for all to mechanically fit the mouse, or al- ternatively manufactured for a certain mouse. a translatable and rotatable bar, passing under the mouse ball. The ball rolls on the bar. - A key for click-function. The user translates and/or rotates the bar, to obtain pointing function. "Click" takes place by depressing the key for click-function. Description of the figures Fig. 1 shows a bar included in a barcontroldevice according to the inven¬ tion, fig. 2 shows a barcontroldevice, fig. 3 shows the barcontroldevice in end view with a mouse mounted thereupon, figs. 4 and 5 shows mechanics for click-function, fig. 6 shows means for friction reducing, fig. 7 shows support by means of balls, fig. 8 shows some dimensions, figs. 9, 10, 1 1 and 1 1 a show alternative embodiments. Description of the invention In connection with figs 1 -3, an embodiment of a barcontroldevice 1 is now shown. A bar 2 is placed in, and is supported by a tube 3. The tube 3 is preferably placed in front of a keyboard, but can be placed anywhere and can even be used in situations where no keyboard is present. The bar 2 has a surface 5 consisting of rubber or the like. On the bar 2, two bearing rings 6 and 7 are placed, preferably consisting of a low friction plastic material, such as acetal. The bearing rings 6 and 7, having so¬ mewhat larger diameter than the bar 2, makes possible that the bar 2 can slide along its longitudinal axis 8, and can rotate around the longitudinal axis 8 inside the tube 3. The tube 3 has an opening 9 situated such, that the bar 2 can be reached by both thumbs. The tube 3 is supported at its left end by a holder 10, and at its right end by a " right-support" 1 1 . The holder 10 and the right-support 1 1 rest at the desk 1 2. The holder 1 0 con¬ sists of two plates 14 and 1 5, and one plate 1 6, fastened to the tube 3. The plates 14 and 1 5 have two upper surfaces, 14a and 1 5a respectively, being parallel and on flush with one another. The plates 14 and 1 5 have each two upwards bent tabs 14b, 14c, and 1 5b, 1 5c respectively, having the purpose to hold the mouse 13 in a sideways position. It can be noted that the tabs 14b, 14c, 1 5b and 1 5c are inclined outwards, simplifying the placing of the mouse 13. The plates 14 and 15 are bent in S-shape and meet below the bar 2. They are furnished with feet 14d and 1 5d, contacting the desk 1 2. The plates 14 and 1 5 can be displaced relative to each other in the direction of double ar¬ row A, and can be locked together by means of a first wing nut 1 7. The plate 1 6, fastened to the tube 3, is displaceable relative to the plate 14 in the direction of said double arrow A, and can be locked to the plate 14 by means of a second wing nut 18. For adjustment of the holder 10 to a mouse 1 3, the mouse 1 3 is placed on the plane surfaces 14a and 1 5a, after which the plates 1 and 1 5 are pus- hed together until the tabs 14b, 14c, 1 5b and 1 5c barely contact the cor¬ ners of the mouse. Then, the wing nut 17 is tightened to lock the plates 14 and 1 5 together. After that, the plate 1 6 is moved relative to the plate 1 such, that the bar 2 is located under the mouse ball 1 9, after which the wing nut 18 finally is tightened, locking the plates 14 and 1 6 together. The mouse ball 19 now rests on the bar 2, and rolls on the bar 2 when the user moves the bar 2 in the tube 3, at which the movement of the bar 2 being detected by the mouse 13. Rotation of the bar 2 moves the marker on the screen in a vertical direction, and sideways translation of the bar moves the marker in a sideways direction. Hence, the user can with one or both thumbs reach the bar 2 via the open area 9 in the tube 3, rotate and translate the bar 2, and thereby move the marker on the screen in a very effective manner. Means for bringing about click function is shown in connection with figs 2, 4 and 5, but is to the largest extent excluded in all other figures for the sake of clarity. A "click-key" 20 is pivoted in such a manner that its posi¬ tion can be changed a small angle around the dotted and dashed bearing axis 21 . Bearing axis 21 is preferably parallel with the longitudinal axis 8 of the bar; any mutual angle ought not to exceed 30 degrees. The bearing support takes place via pivot pins 22 and 23, located in holes 24 and 25, situated in a bent-down tab of the plate 16 and the right-support 1 1 , re- spectively. The left part of the click-key 20 is provided with a tab 26. Tab 26 contacts the upper surface of a plate 27, rotatably mounted to the plate 14, so it can tilt a small angle around the dotted and dashed axis 4 via some type of bearing (not shown). The axis 4 is perpendicular to the longi¬ tudinal axis 8 of the bar. The plate 27 is provided with a tab 28, placed in a hole 29, in a vertical strip 30. The vertical strip 30, passing through a pilot hole 31 in the plate 14, is provided with a recess 32, in which a pin 33 is placed. The axis 33 has an area 34 with larger diameter than the width of the recess 32. The right end of the pin 33 has a threaded area, on which a nut 35 is screwed on. A tension spring 38, having attachment points in the plate 14 and the plate 27, pulls up the plate 27 against a stop 40, con¬ nected to the plate 14 (shown in fig. 2), resulting in that the front edge 20a of the click-key 20 normally is located approximately 4 mm above the desk 12. The first time the barcontroldevice 1 is adjusted to a mouse, the above described adjustments of the parts 14, 1 5 and 16 are made. Then the mechanics for click-function are adapted by adjusting the pin 33 to a loca¬ tion in the recess 32, where it barely contacts the left key 36 of the mouse. The nut 35 is then tightened, and the adaptation is ready. Depres- sing the click-key 20 now results in a corresponding descending movement of the plate 27, the vertical strip 30, axis 33 and the left key 36 of the mouse. An advantage with the shown arrangement is that the force required for depressing the click-key 20 remains constant, regardless of the mutual position of the click-key 20 and those parts (27, 30 and 33) which depress the left mouse key (said position varying with the mutual position of plates 14 and 1 6). A further advantage is that the top surface of the click-key 20 is situated only a few millimetres above the surface of the desk; more than 10 millimetres above the keyboard will hamper the possibility to reach the bar 2. Even if another location of the click-key 20 is conceivable, for in¬ stance between the bar 2 and the spacebar, the shown location in front of the bar 2 and near the desk 1 2, is very good from an ergonomic point of view, since the thumbs can be used for conveniently depressing plate 20. The barcontroldevice can be adapted via the above shown adjustment pos- sibilities to mice of very different shapes. Hence, a user with an existing mouse 13 can get a barcontroldevice 1 , adjust the holder 10 to the mouse, thereafter adjust the "click-mechanics" via the above described procedure, and the barcontroldevice is ready to use. Certain mice have an irregular shape. Adaptation of the holder 10 to such mice requires that one or more of the tabs 14b, 14c, 1 5b and 1 5c be si¬ deways adjustable in relation to the plates 14 and 1 5. Mechanical means for this is not shown, but can be implemented easily. It is possible to arrange a second key (not shown) for actuating the right key of the mouse. However, direct depressing of the right mouse key by the outer part of the left palm of the hand works very well; the right key is relatively seldom used, so the approximately 10 centimetres movement of the left hand which is necessary for this should be acceptable. The device shown above fits only conventional mice provided with a ball, but not so called optical mice, detecting reflecting patterns in a special pad. However, the barcontroldevice can be adapted to fit even optical mice, by providing at least the part of the bar that is situated under the mice with the proper reflecting patterns. The marker on the screen will also in this case move in the right manner. If the bar surface friction at the same time is relatively high, the barcontroldevice will fit also mice with a ball. Certain mice can have a ball of considerable weight, which adds to the weight of the bar. It has proven that even if the bearing rings 6 and 7 pro¬ vide low friction against the inside of the tube 3, the bar 2 can still give a "too stiff" feeling when moved. Contributing to this is not only friction between the bearing rings 6 and 7 against the tube 3, but also the fact that the ball in mice cannot rotate free of friction inside the mouse. The often too high resulting friction can be reduced to a low enough value if the bar 2 contains magnetic material which is attracted by a magnetic circuit, here shown as a ferrite magnet 39 fastened to the tube 3 (fig 6). The magnet 39 lifts the bar 2, reducing considerably the contact force of the bar 2 against the inside of the tube 3 and thus the resulting friction. The lifting force of the magnet 39 may be controlled by adjusting the dis- tance between the magnet 39 and the bar 2 by means of some suitable mechanic (not shown). A disadvantage by using the magnet 39 is that adjustment of the lifting force might be needed for obtaining lowest friction. The need for adjust- ment should be avoided if possible; it would be better if the friction without adjustment could be kept at a low and as constant value as possible, elimi¬ nating demands on the user to minimize the friction. Further, the magnetic field of the magnet 39 may destroy information on floppy disks if not pro¬ perly screened; screening (not shown) increases the complexity. Moreover, the play for the bearings 6 and 7 inside the tube 3 must be kept relatively low, in order not go give susceptibility to contaminations which can pene¬ trate between the tube 3 and the bearing rings 6 and 7. The reason why the play in question must be low is the following: if the lifting force of the magnet 39 is set approximately such, that the bar 2 "floats" in the tube 3 (for obtaining low friction), the bar 2 will assume all radial locations in the tube 3 which the play concerned will permit, when the user manipulates it. This can cause jamming if the rubber covering 5 of the bar contacts the lower surface of the mouse; alternatively, the play can cause the bar to drop so much that the mouse ball 1 9 does not reach it. The problem men- tioned above may be especially troublesome in view of the prospect of be¬ aring play increasing because of wear. Therefore, in figs 7 and 8 are shown a preferred method of supporting the bar 2, eliminating the problems above. No magnet is needed. The bearing ring 6 has been replaced by a number of n balls, denominated K-μ K2... K n . In a working prototype, the number of balls were 1 2. The balls K- | -K n are mutually held in place by a ball cage 41 , which is free and not fastened to either the bar 2 or the tube 3. The balls K- | -K n roll between the bar 2 and the tube 3, when the bar 2 is rotated as well as translated. A stop ring 42, secured to the bar 2 and of a slightly less diameter than the inside of tube 3, ensures that the ball cage 41 does not reach a position too far out to the right. l here must be a certain relationship between the outer diameter D y of the ball cage, the material thickness t of the ball cage, the length L of the ball cage, the inside diameter D r of the tube 3, and the ball diameter D^ (fig. 8). If not, the ball cage 41 runs the risk of being tilted, thereby contacting the bar 2 which would cause sticking. The dimension t must furthermore be so large that the balls do not tend to roll in between the bar 2 and the ball cage 41. The following rule of thumb does always work: D r -D y = 0,10 mm L = D r t = D^/2. A non-adjustable embodiment is shown in fig. 9. The mouse (not shown) is held in place by a specially made holder 43, provided with a border 44, fit¬ ting the mouse in question and holding the mouse laterally. Further, no mechanical means for adjusting the click key to the mouse key is present, instead an offshoot 45 from the click key 46 goes directly to the left key of the mouse. An advantage of this embodiment is simpler design and that the user does not need to make any adjustments; a disadvantage is that it only fits one type of mouse. Yet another embodiment is shown in fig. 10. Mechanical means for actua¬ ting the mouse keys is not shown. A first bar 47 is rotatable and translata¬ ble in the same manner as the bar 2. The bar 47 has an area 48 provided with teeth, having somewhat smaller outer diameter than the bar 47. A se- cond bar 49 has teeth 50 in a corresponding manner, and slides on a cen¬ tral shaft 51 . The bars 47 and 49 are connected via an intermediate ge¬ arwheel 52, able to rotate and slide on a stationary shaft 37. The bar 47 is manipulated by the user, and the mouse ball rolls on the bar 49. Rotation and/or translation of the bar 47, results via the gearwheel 52 in a corre- sponding rotation and/or translation of the bar 49. This embodiment does exemplify that intermediate mechanical means (i.e. the gearwheel 52 and the bar 49) may be present between the bar that is manipulated by the user (i.e. bar 47 in this case) and the detection means of the mouse (the ball). The important thing is however that the mouse detects (indirectly) the movement of the bar 47. In figs 1 1 and 1 1 a yet another embodiment is shown. Here, a click-key 53 actuates an electrically closing contact 54, connected via wires 55 and 56 to contact points 57 and 58 on the holder 59. The mouse 60 (shown in fig. 1 1 a) is provided with contact points 61 and 62, contacting the contact points 57 and 58 when the mouse 60 is placed on the holder 59. Depres¬ sing the click-key 53 now results in click-function, if the mouse 60 is able to detect electrical closing between its contact points 61 and 62. The advantage of this embodiment is its somewhat simpler mechanics, especially if the number of click-keys are increased, its disadvantage may be that it requires a specially made mouse. Many modifications can be made; some examples are given below. The number of click-keys can for all embodiments be increased. The mouse hol- der can also be located next to the right side of the keyboard. Further, the bar 2 can be supported in other ways than those described; for instance slide (or roll with balls in cage) on a central pin; this arrangement has the disadvantage that a left support for the central pin must be located a consi¬ derable distance from the left side of the holder 10. The tube 3 may be mo- vable along its longitudinal axis as well; in which case the tube 3 would be slideable relative to a supporting structure and thus able to follow sideways movement of the bar 2. This makes very little difference concerning the bar 2; it would still be rotatable and translatable about and along its longitudinal axis. The barcontroldevice may also be integrated in a keyboard. Also other modifications are conceivable and may be made by professionals.

Claims: Claims 1. A control device (1) for pointing and clicking function related thereto, including a bar (2, 47) rotatable about and displaceable along its longitudinal axis (8), and means (3, 51) for radially supporting the bar, c h a r a c t e r i z e d by means (10, 43) for accommodating a pointing device, such as a mouse, mouse pen or the like, in a position where the pointing device is able to detect the movement of the bar, and by at least one click function key (20, 46, 53). 2. A control device according to claim 1, c h a r a c t e r i z e d in that the movement of a click function key (20, 46) is transmitted to a key (36) on the pointing device. 3. A control device according to claim 1 or 2, c h a r a c t e r i z e d by means (14b, 14c, 15b, 15c, 44) for prevent¬ ing lateral movement of the pointing device. 4. A control device according to claim 3, c h a r a c t e r i z e d in that the inside of said lateral movement preventing means is sloping. 5. A control device according to claims 1-4, c h a r a c t e r i z e d in that the click function key (20, 46) is pi- votable about an axis (21) forming an angle not exceeding 30 degrees with the longitudinal axis (8) of the bar. 6. A control device according to any of the preceding claims, c h a r a c t e r i z e d by adaptability to various pointing devices by means of, first, adjustable means (27, 30, 33) between the click function key (20) and the pointing device key (36) and, secondly, by adjustable means (14, 15, 16) for determining the position of the pointing device in relation to its accommodating means and the bar. 7. A control device according to claim 6, c h a r a c t e r i z e d in that the click function key is connected to a pivotably supported member (27), the movement of the click function key being transferred, by way of said pivotably supported member (27), to a key (36) on the pointing device. 8. A control device according to claim 7, c h a r a c t e r i z e d in that angular movement of the pivotably sup¬ ported member (27) is converted to an essentially non-pivotal movement of a part (30) mounted between the pivotably supported member and the point¬ ing device key (36). 9. A control device according to claims 6, 7 or 8, c h a r a c t e r i z e d by a first adjustable part (14) having a first surface (14a) and a second adjustable part (15) having a second surface (15a), said surfaces being provided for supporting the pointing device, and a third part (16) secured to said radially supporting means (3), the first adjustable part (14), the second adjustable part (15) and the third part (16) being lockable in relation to each other. 10. A control device according to claims 6-9, c h a r a c t e r i z e d in that at least one of said means (14b, 14c, 15b, 15c) for preventing lateral movement of the pointing device is lat¬ erally adjustable. 11. A control device according to any of the preceding claims, c h a r a c t e r i z e d in that the top surface of the click function key (20, 46, 53) is located no more than 10 mm above the surface plane of the base (12) upon which the device is resting. 12. A control device according to any of the preceding claims, c h a r a c t e r i z e d in that the bar has a surface coating (5) of rubber or similar material. 13. A control device according to any of the preceding claims, c h a r a c t e r i z e d by a plurality of balls ( .- ) in a ball cage (41), said balls being able to roll between the bar and said radially supporting means (3), the ball cage (41) being secured neither to the bar (2), nor to said supporting means (3). 14. A control device according to any of the preceding claims, c h a r a c t e r i z e d in that the bar is provided with at least one slide bearing ring (6, 7) adapted to slide against the radially sup¬ porting means (3). 15. A control device according to claim 14, c h a r a c t e r i z e d in that the contact force and thus the fric¬ tion between the slide bearing ring and the radially supporting means (3) is reduced by magnetic means (39). 16. A control device according to any of the preceding claims, c h a r a c t e r i z e d in that the means (10, 43) accommodating the control device are arranged to be placed adjacent either side of a key- oard. 17. A control device according claim 16, c h a r a c t e r i z e d in that all members (6, 7, K--K ) supporting the bar (2) are located on one side of said accommodating means (10, 43). 18. A control device according to any of the preceding claims, c h a r a c t e r i z e d by means adapting the control device to point¬ ing devices which operate by detecting optically reflecting patterns on the bar.

Inventors: STROEMBERG ROLF, STROEMBERG, ROLF
Applicants: STROEMBERG ROLF, STROEMBERG, ROLF
Application year: 1995
Main classification: G06K11
IPC codes: G06F3