CN1349195A

CN1349195A - Optical mouse

Info

Publication number: CN1349195A
Application number: CN01117796.9A
Authority: CN
Inventors: 王清文; 郑宇志; 凌浩峰
Original assignee: Primax Electronics Ltd
Current assignee: Primax Electronics Ltd
Priority date: 2000-10-16
Filing date: 2001-05-17
Publication date: 2002-05-15
Also published as: JP2002132439A; TW504638B; DE10149272A1

Abstract

The structure of an optical mouse is as follows. There is a bottom shell with a first opening. A group of lenses is located above the first opening and a circuit board is placed above the group of lenses, in order to control the operation of mouse and to fix the group of lenses on the bottom shell. There is a light source seat on the bottom shell that has a tilted plane to support a light source. The circuit board fixes the light source on the tilted plane of a light source seat in order to pass the light through the first opening, and with the light being reflected back via the first opening, the light passes to light sensor.

Description

Optical mouse

The present invention relates to a kind of optical mouse, particularly relate to the optical mouse of a kind of optical texture through simplified design.

The traditional mechanical mouse is to adopt a spheroid that is installed in the on, and it is outer and contact with the plane (as desktop) in the external world to make the spheroid of a part be exposed to housing.When mechanical mouse was mobile in the plane, spheroid just can roll and trigger the sensor in the mouse in mouse, and sensor can become the movement decomposition of balls tumble two mutually perpendicular components, and turned to corresponding signal.This design has been extensive use of many years, and is still very general in today.But unfortunately, the rolling of spheroid can be stained with and be invited dust; These dusts can be accumulated on the inductor, and disturb their action.If there is not periodic cleaning, the running of mechanical mouse can begin to become irregular, is not to block, and is exactly the action meeting irregularity of mouse.

The appearance of optical mouse has overcome this problem.Optical mouse is not that the induction spheroid is mechanical mobile, but obtains the continuous pictures on plane fast, is compared mutually again, determines direction and distance that this optical mouse moves.And the mode of the principle of optical sensor and continuous pictures data processing has been known in the prior art in the optical mouse, so do not need to be given unnecessary details at this.Because the mechanical type movable part that can not wear and tear or block in the optical mouse, so its reliability is higher; And optical mouse also can be more smooth-goingly with sensing user's action.

See also Fig. 1.Fig. 1 is the backplan of existing optical mouse 5.Existing optical mouse 5 has a drain pan 20, and an opening 25 is wherein arranged.By opening 25, the plane that this optical mouse slipped over " is seen " in these optical mouse 5 meetings.Relatively the resulting displacement data of each plane picture can be delivered on the computing machine (not showing) by a cable 3; And the tail end of cable 3 can be the adapter of many kinds of standards, similarly is the PS/2 adapter, USB (universal serial bus) (USB) adapter or the like.

See also Fig. 2.Fig. 2 is the partial exploded view of optical system 10 in the existing optical mouse 5.One optical group 30 is contained on the opening 25 of drain pan 20, and optical group 30 includes an eyeglass 32, one first reflecting surface 34 and one second reflecting surface 36.One circuit board 40 is located on the optical group 30.Circuit board 40 has a hole 48, be positioned at eyeglass 32 tops, and an OPTICAL SENSORS 42 just is contained in the top of circuit board 40 holes 48.OPTICAL SENSORS 42 can obtain the image that optical mouse 5 slips over the plane, and analyzes the picture that OPTICAL SENSORS 42 obtains with circuit (not pointing out among the figure), determines the displacement of optical mouse 5 thus.One light emitting diode 44 also is contained on the circuit board 40.Light emitting diode 44 is intended for the light source of optical inductor 42.Because outside first reflecting surface, the 34 meeting outburst holes 48, make first reflecting surface 34 just between light emitting diode 44 and optical inductor 42.At last, a photomask 46 also is contained on this circuit board 40, and the light that is used for avoiding light emitting diode 44 to send is directly injected optical inductor 42.

See also Fig. 3 (and simultaneously with reference to figure 2).Fig. 3 is the outboard profile of optical system 10 after appropriateness is simplified among Fig. 2.Light 11 is put injection moulding by light emitting diode 44.Though photomask 46 has interdicted the sub-fraction of light 11, the direction direct projection that most light 11 all can be faced towards light emitting diode 44 and going out; Since the direction that light emitting diode 44 is faced is exactly first reflecting surface 34, most light 11 can be penetrated towards first reflecting surface 34, and reflexes to second reflecting surface 36 downwards by first reflecting surface 34.Through the reflection of second reflecting surface 36, light 11 can pass the opening 25 of drain pan 20, and illuminates plane 13.The light 11 of plane of incidence 13 can be become light 12 by the character of surface modulation on plane 13 and reflection.Next light 12 can be collected by eyeglass 32 and focus on the optical inductor 42.Optical inductor 42 utilizes light 12 to obtain the picture on plane 13 continuously, and analyzes these continuous pictures, with direction and the distance that determines that this optical mouse 5 moves.

But optical system 10 is useful very complicated.Specifically, include the optical group 30 of first reflecting surface 34 and second reflecting surface 36, prices are rather stiff for it.Expensive element can increase the overall price of this optical mouse, and it can't be competed with mechanical mouse on market.

The object of the present invention is to provide the optical mouse of a kind of optical system, to address the above problem through simplified design.

The object of the present invention is achieved like this, and a kind of optical mouse promptly is provided, and it includes: a drain pan which is provided with one first opening; One lens set is located at the top of this first opening; One circuit board, the top that it is located at this lens set is used for controlling the operation of this mouse and this lens set is fixed on this drain pan; One light source is used for producing light; One OPTICAL SENSORS is used for detecting the light that this light source sends; And a light source base, be located on this drain pan, which is provided with a clinoplane, be used for carrying this light source; Wherein this circuit board can be fixed in this light source on the clinoplane of this light source base so that the light that this light source sent directly penetrate this first opening and in the reflection after reach this OPTICAL SENSORS by this first opening.

Below in conjunction with accompanying drawing, describe embodiments of the invention in detail, wherein:

Fig. 1 is the backplan of existing optical mouse;

Fig. 2 is the part exploded view of the optical system of existing optical mouse among Fig. 1;

Fig. 3 is the side view of optical system among Fig. 2;

Fig. 4 is the backplan of optical mouse of the present invention;

Fig. 5 is the opticator exploded view of optical mouse among Fig. 4;

Fig. 6 is the side view of optical system among Fig. 5;

Fig. 7 is the opticator exploded view of another embodiment of optical mouse among Fig. 4.

See also Fig. 4.Fig. 4 is the backplan of optical mouse 50 of the present invention.Optical mouse 50 is designed on a plane to slide on (similarly be desktop, but show in the drawings), and detects this slide action.Optical mouse 50 has a drain pan 60, and one first opening 62 is arranged on it.By this first opening 62, optical mouse 50 can be detected the plane that optical mouse 50 slips over.Displacement data can utilize a cable 53 to deliver on the computing machine (not shown).The tail end of this cable 53 can be the adapter of many kinds of standards, similarly is the PS/2 adapter, USB (universal serial bus) (USB) adapter or the like.

See also Fig. 5 and Fig. 6 (and simultaneously with reference to figure 4).Fig. 5 is the partial exploded view of the optical system 110 of optical mouse 50.Fig. 6 is the side view of optical system 110.Optical system 110 has comprised drain pan 60, a light source 70, a lens set 80, a circuit board 90 and an OPTICAL SENSORS 100.OPTICAL SENSORS 100 can the detecting reflection from the plane 51 light 113, and obtain a succession of picture on plane 51.OPTICAL SENSORS 100 includes photoinduction and control circuit (not shown), allows OPTICAL SENSORS 100 can analyze these continuous pictures, and determines the moving direction and the distance of optical mouse 50 thus.Similarly the example of device is the HDNS-2000 of AgilentTechnologies company.The output of OPTICAL SENSORS 100 is sent to displacement data on the computing machine (not shown) by cable 53.OPTICAL SENSORS 100 itself then is to be installed on the circuit board 90, and is electrically connected with circuit board 90.In addition, have one second opening 92 on the circuit board 90, and OPTICAL SENSORS 100 just is installed on the position that strides across second opening 92, so that allow light 113 can be injected into OPTICAL SENSORS 100.

Drain pan 60 itself is the integrated formed structure that utilizes the die sinking of pressure plastic cement to make.That is to say that drain pan 60 is single plastic cement structures, under High Temperature High Pressure with the plastic cement injection mo(u)lding.Certainly, except plastic cement, drain pan 60 also can be with other material; But plastic cement is very cheap, manufacturing and rather durable easily.First opening 62, a light source base 66, several L type positioning seat 67 and geometrical clamps 69 are arranged on the drain pan 60.By first opening 62 on the drain pan 60, can incide plane 51 from the light 112 of light source 70; And 51 light that reflect 113 also can arrive optical inductor 100 from the plane.Light source base 66 is that light source 70 is taken in design, and a bottom surface 64 that tilts towards first opening 62 is arranged, and dual-side 63.Bottom surface 64 places between the dual-side 63, and tilts and form the angle that an angle is θ with the surface of drain pan 60; And this angle that tilts can be fixed in light source 70 certain angle, makes the light source 70 can be with the angle that is predetermined towards first opening 62.This angle that is predetermined is determined by the deviser, and the deviser can select an angle that can highlight plane 51 character of surface, make the light 112 of plane of incidence 51 can highlight the character of surface on

plane

51, and 51 light 113 is bigger by the degree of the character of surface modulation on plane 51 from the plane to make reflection, thereby improves the sensitivity of optical mouse of the present invention.The L type positioning seat 67 of being located at drain pan 60 can be fixed in the location with lens set 80, because each corner 81 of lens set 80 just can embed each corresponding L type positioning seat 67.Lens set 80 has an eyeglass 84 to be fixed in the eyeglass seat 82, and each corner 81 is the part of eyeglass seat 82.And corner 81 is arranged in pairs or groups together with L type positioning seat 67, can guarantee that just eyeglass 84 can be positioned at the top of first opening 62.Lens set 80 also has a flap 86; When lens set element 80 utilized L type positioning seat 67 to be positioned first opening, 62 tops, flap 86 can cover a side of light source base 66, formed the shape on a roof.And flap 86 and light source base 66 can surround a hollow structure 101, and light source 70 promptly is placed in one.Lens set 80 itself also is integrated structure, is to be made by high-quality and as clear as crystal plastic cement.

Light source 70 is a light emitting diode, is installed on the circuit board 90 with lead 72.And lead 72 is enough long, is enough to allow light emitting diode 70 can stretch on the circuit board 90 within second opening 92.Light emitting diode 70 can pass circuit board 90 along second opening 92, puts in flap 86 and the light source base 66 formed hollow structures 101, and light emitting diode 70 can be placed among the light source base 66 just.Then, circuit board 90 just can be fixed on the drain pan 60, and lens set 80 just be positioned at the below of circuit board 90 with geometrical clamp 69.When circuit board 90 fixedly the time, also can avoid lens set 80 to run out of L type positioning seat 67 simultaneously with geometrical clamp 69 clamps.That is to say that lens set 80 is to be clipped between circuit board 90 and the drain pan 60.Therefore, L type positioning seat 67 can be fixed on lens set 80 on the drain pan 60 with circuit board 90.

During operating optical mouse 50, light 112 is by light emitting diode 70 injection mouldings., the direct of travel of most light 112 determined that the angle of light emitting diode 70 is again by light source base 66 decisions because being the angles by light emitting diode 70.In addition, the hollow structure 101 at light emitting diode 70 places also can form a photomask, avoids light directly to meet this optical inductor 100.Comprehensive above each factor, light 112 can be directly incident on plane 51, and is reflected by plane 51.At reflex time, the light of incident 112 can be by the character of surface modulation on plane 51, and reflection and become light 113.Light 113 can up advance to eyeglass 84.Eyeglass 84 can focus on light 113, and the light 113 after focusing on can pass to OPTICAL SENSORS 100 by second opening 92 of circuit board 90.

See also Fig. 7.Fig. 7 is the part exploded view of the another kind of embodiment 200 of optical system in the optical mouse 50.The operation principles of first embodiment 100 of optical system is identical in optical system 200 and the optical mouse of the present invention; But in optical system 200, circuit board 210 is to be fixed on the drain pan 220 with screw 203.Screw 203 can pass the screw hole 207 on the circuit board 210, locks in the fixed leg 205 of drain pan 220.In addition, this lens set 230 does not have flap and light source base 225 to form a hollow structure.Relatively, be with side 226, an oblique top 228 and a ramped bottom surface 224 of light source base 225 itself in the optical system 200, formed a hollow structure.That is to say that the function of light source base 225 itself is just fully as the hollow structure 101 of aforementioned optical system 110.In other words, light source base 225 not only itself can form a photomask, and protection OPTICAL SENSORS 215 avoids it to receive direct light from light source 240, also can will keep the angle of light source 240 in the drain pan 220 simultaneously.

Compared with prior art, in the optical system of optical mouse of the present invention, do not need on reflecting surface slips over light from the source reflection to the optical mouse the plane, but first opening of light by drain pan is directly incident on the plane.This helps to reduce the whole cost of this optical system.And the light source of optical system just can be embedded in the light source base among the present invention; And the design of this light source base not only can guarantee that also light source has suitable angle in the drain pan of optical mouse as a photomask.

The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.

Claims

1. optical mouse, it includes:

One drain pan which is provided with one first opening;

One lens set is located at the top of this first opening;

One circuit board, the top that it is located at this lens set is used for controlling the operation of this mouse and this lens set is fixed on this drain pan;

One light source is used for producing light;

One OPTICAL SENSORS is used for detecting the light that this light source sends; And

One light source base is located on this drain pan, which is provided with a clinoplane, is used for carrying this light source;

Wherein this circuit board can be fixed in this light source on the clinoplane of this light source base so that the light that this light source sent directly penetrate this first opening and in the reflection after reach this OPTICAL SENSORS by this first opening.

2. optical mouse as claimed in claim 1 wherein is provided with at least one L type positioning seat in addition on this drain pan, be used for fixing the position of this lens set.

3. optical mouse as claimed in claim 1, wherein this lens set includes an eyeglass and an eyeglass seat, and this eyeglass is located in this eyeglass seat, and this eyeglass seat clamp is between this drain pan and this circuit board.

4. optical mouse as claimed in claim 3, wherein this lens set includes a cantilever in addition, is used for hiding a side of this light source base, and to form a hollow structure with this light source base, this light source places this hollow structure.

5. optical mouse as claimed in claim 4, wherein this hollow structure is used for intercepting the part light that this light source produces.

6. optical mouse as claimed in claim 1, wherein this light source base has a hollow structure.

7. optical mouse as claimed in claim 6, wherein this hollow structure is used for intercepting the part light that this light source produces.

8. optical mouse as claimed in claim 1, wherein this circuit board has one second opening, and this OPTICAL SENSORS is located at the top of this second opening, and light reflected can reach this OPTICAL SENSORS via this lens set and this second opening.

9. optical mouse as claimed in claim 8, wherein this light source is to be located on this light source base in the mode that penetrates this second opening.

10. optical mouse as claimed in claim 1, wherein this light source is a light emitting diode.

11. optical mouse as claimed in claim 1, wherein this drain pan includes at least one geometrical clamp in addition, is used for this circuit board of clamp.

12. optical mouse as claimed in claim 1, it includes a plurality of screws in addition, is used for this circuit board is fixed on this drain pan.

13. optical mouse as claimed in claim 1, wherein this light source base and this drain pan are one-body molded.