CN2521583Y

CN2521583Y - Optical coding device

Info

Publication number: CN2521583Y
Application number: CN 01275913
Authority: CN
Inventors: 黄依滕
Original assignee: Taiwan Alpha Electronic Co Ltd
Current assignee: Taiwan Alpha Electronic Co Ltd
Priority date: 2001-12-05
Filing date: 2001-12-05
Publication date: 2002-11-20
Anticipated expiration: 2011-12-05

Abstract

The utility model relates to an optical encoder with a pair of mutually-corresponding infrared emanating components and light quantity detecting component arranged on an ad hoc circuit board. A rolling optical grating driven by a rotation axis is mounted between a right-sided casting and a left-sided casting, and a collar plate which is capable of being sheathed between the infrared emanating components and the light quantity detecting component is arranged on the collar plate. Sixty-four equally-spaced radial distributed optical gratings are arranged in the corresponding positions of the infrared emanating components and the light quantity detecting component. The optical encoder is capable of outputting digital signals with functions of encoding and decoding for specific apparatuses via an overhanging terminal when the rolling optical grating rotates between the infrared emanating components and the light quantity detecting component. The utility model has the advantages of simple structure, and extraordinary simple assembly and operation. The resolution ratio captured by the utility model is excellent due to the sixty-four groups of impulses with stable phase differences produced by a loopy rotation of the rolling optical grating, further the rolling optical grating is unlikely to produce frictions and bumps with other components, thereby the life duration of the utility model is greatly extended.

Description

Optical encoder

Technical field

The utility model relates to a kind of optical encoder.

Background technology

The exhausted major part of at present common scrambler is the mechanical realization that is rotary contact type, that is to say, by set contact salient point on the rotating circular disk and another other effect of touching of establishing the set contact salient point of receiving trap, reaching the generation digital signal, and then provide the coding and the decoding function of certain specific device.

No doubt this mechanical scrambler really widely the dealer use, and can produce the effect that makes industry expectation really.But because this be abutted against touch that salient point touches can be with the scrambler that produces digital signal because of touching friction and produce very big noise between this contact salient point, even the long-term friction between this contact salient point touches the serviceable life that can reduce this scrambler greatly, so it is often denounced by industry.Say again, the pulse number that set rotating circular disk rotation one circle of this kind mechanical type scrambler can produce is very limited, and its phase differential of exporting two pulses is also very unstable, so relatively can cause the not good phenomenon of this encoder resolution, so relatively form the shortcoming that this scrambler commonly used can't be widely used.

Though, the present optical encoders, angle sensors that other dealer institute Development and Production is also arranged on the market, very complicated because of the structure of this optical encoders, angle sensors, so it is made the difficult disadvantage except having, relatively also can cause the high situation of production cost.

Summary of the invention

The optical encoder that the purpose of this utility model provides a kind of simple structure, resolution is splendid and serviceable life is extremely long

In order to achieve the above object, the utility model provides a kind of optical encoder, mainly formed by an ad hoc circuit board, a right side case, a turning axle, a rotating grating and a left side case, this ad hoc circuit board is provided with a lateral trench, the outside of this lateral trench one end is respectively equipped with the infrared assembly and the light quantity detection components of a pair of mutual correspondence, this ad hoc circuit board left side ora terminalis is provided with the outward extending terminal of a plurality of levels, and its ora terminalis place, right side convexes with one and sets firmly the portion of inserting; This right side case is provided with the storage tank of an opening towards a left side, the below of the set right side wall of this storage tank is provided with one can set firmly the jack portion that the portion of inserting plants and fixes for this, the right half side below that is installed in this storage tank of this ad hoc circuit board, the centre of this right side wall is provided with an axis hole that outwards runs through in addition, and the outboard peripheries of this axis hole further vertically extends to form a cylindrical shape carriage laterally; This turning axle is provided with bulge loop and forms the grating canned paragraph that the cover be positioned at the right side is inserted shaft part and is positioned at the left side thereon, and this cover is inserted sheathed elastic collar of shaft part and packing ring, and by running through this axis hole and axle is located in the cylindrical shape carriage in this case inside, right side; The grating canned paragraph in this left side is in to cut on its outer peripheral face one or more vertical fastening plane; This turning axle is provided with the medium pore canal that runs through its central shaft, and the two ends of this medium pore canal further are respectively equipped with stepped hole slot, and an ejector pin is inserted to live by the outer end resilient sleeve of this turning axle and is located in this medium pore canal; This rotating grating is provided with a hollow cylinder that can be nested with at the set grating canned paragraph of this turning axle place, this hollow cylinder is provided with a disk that is equipped with the proper number grating, the grating that this disk ring is established is positioned in the middle of the corresponding position of infrared assembly and light quantity detection components, and the below of this disk cover inserts in the lateral trench of this ad hoc circuit board; This left side case is provided with corresponding to right side case and opening and accommodates this half side storage tank in ad hoc circuit board left side towards right, confession, the set left side wall of this left side case is provided with a plurality of perforated holes corresponding to ad hoc circuit board terminals, and this terminal stretches out this case outside, left side by the perforated holes place; Be provided with the outwardly directed switchgear of contact terminal in the storage tank of this left side case, this switchgear is provided with the ladder hole that supplies this turning axle and the work of rotating grating left end to establish, the medial extremity place of this ladder hole is provided with one can be by the switching starter of this ejector pin roof pressure, so the group via above-mentioned member can form an optical encoder immediately, with to function selecting, the control of digital signal, the measurement of straight-line displacement, angle displacement or speed etc. provides better foundation.

The utility model has the advantages that: the utility model is by the ad hoc rotating grating that 64 road gratings are arranged, after making the combination of itself and ad hoc infrared assembly and light quantity detection components, produced the comparatively stable digital signal of phase differential, and then obtained the coding effect of preferable resolution.And by can not producing the package assembly of touching friction between ad hoc rotating grating and infrared assembly and light quantity detection components, reduce the scrambler noise, and then provide this scrambler serviceable life to reach.Because the disclosed optical encoder simple structure of the utility model is so its assembling operation is very simple; Say again, the pulse that can produce 64 groups of tool stable phase potential differences because of its rotating grating when rotating a circle is so its resolution that can obtain is very good, in addition, also because its rotating grating can't produce the phenomenon that friction is touched with other assembly, so it is to increase the service life greatly.

Description of drawings

Below in conjunction with drawings and Examples the utility model is elaborated:

Fig. 1 is the structurally improved D structure exploded view of optical encoder of the present utility model;

Fig. 2 is the D structure constitutional diagram of optical encoder of the present utility model when not containing the left and right side case;

Fig. 3 is the D structure combination appearance figure of optical encoder of the present utility model;

Fig. 4 is the composite construction synoptic diagram of optical encoder of the present utility model;

Fig. 5 is the pulse synoptic diagram that the utility model optical encoder is exported;

Fig. 6 is another enforcement illustration of the utility model optical encoder.

Embodiment

See also shown in Fig. 1-6, optical encoder of the present utility model is made up of an ad hoc circuit board 10, a right side case 20, one turning axles 30, a rotating grating 50 and a left side case 60, wherein

This ad hoc circuit board 10, except in position locating to be provided with the lateral trench 11, the appropriate position, the outside of these lateral trench 11 1 ends is respectively equipped with the infrared assembly 12 of a pair of mutual correspondence and the light quantity detection components 13 that is made of the semiconductor photosensory assembly, this ad hoc circuit board 10 is except the left-hand end edge is provided with the outward extending terminal 14 of a plurality of levels respectively in addition, and its right side ora terminalis then convexes with one and sets firmly the portion 15 that inserts.

And this right side case 20, except being provided with an opening towards the storage tank 21 on a left side, the appropriate position, below of these storage tank 21 set right side walls 22 is provided with one can be for the set fixing jack portions 23 of planting of the portion of inserting 15 that set firmly of this ad hoc circuit board 10, so that the right half side place, below that is installed in this storage tank 21 of this ad hoc circuit board 10, the centre of this right side wall 22 is provided with an axis hole that outwards runs through 24 in addition, and the outboard peripheries of this axis hole 24 further vertically extends into a cylindrical shape carriage 25 laterally.

And this turning axle 30, except inserting the grating canned paragraph 33 in shaft part 32 and left side with the cover that forms the right side with the set bulge loop 31 in its appropriate position, this cover is inserted shaft part 32 behind sheathed suitable elastic collar 34 and packing ring 35, makes it run through this axis hole 24 by these right side case 20 inside and is located in this cylindrical shape carriage 25 by axle; Then cut on its outer peripheral face in addition at these grating canned paragraph 33 places one or more vertical fastening plane 36; This turning axle 30 is provided with the medium pore canal 37 that runs through its central shaft in addition, and the two ends of this medium pore canal 37 further are respectively equipped with the

stepped hole slot

38,39 of appropriate depth, are inserted to live by the outer end resilient sleeve of this turning axle for an ejector pin 40 to be located in this medium pore canal 37.

This ejector pin 40 is except being made of the mobile jib portion 41 that can run through this medium pore canal 37, it is big and can be for the stop part 42 that is inserted in this stepped hole slot 39 that the tail end of this mobile jib portion 41 is provided with an external diameter, so work as prior to the sheathed pushing top spring 43 in these mobile jib portion 41 places, again this mobile jib portion 41 covers are passed the set medium pore canal 37 of this turning axle 30, and by an E type buckle 44 with buckleing of these mobile jib portion 41 front end appropriate positions establish structure, simultaneously, by this E type buckle 44 with the spacing blocking function of this stepped hole slot 38, as shown in Figure 4, this ejector pin 40 is located in the set medium pore canal 37 of this turning axle 30 by resilient sleeve.

This rotating grating 50, can be nested with the hollow cylinder 51 at this turning axle 30 set grating canned paragraphs 33 places except being provided with one, the appropriate position of this hollow cylinder 51 also is provided with a disk 53 that is equipped with proper number grating 52, this disk 53 just in time all is positioned at the centre, corresponding position of this infrared assembly 12 and this light quantity detection components 13 except making this ring establish grating 52, the below of this disk 53 is cover and inserts in structure in the set lateral trench 11 of this ad hoc circuit board 10, promptly as Fig. 2 or shown in Figure 4.And with embodiment of the present utility model, the number of these rotating grating 50 set gratings 52 then is the structure of the equidistant radial arrangement in 64 roads.

As for this left side case 60, except being provided with corresponding to this right side case 20 and opening storage tank 61 towards the right side, for accommodating the left half side outside the place, below of this storage tank 61 of this ad hoc circuit board 10, the appropriate position of these left side case 60 set left side walls 62 also is provided with a plurality of how corresponding perforated holes 63 corresponding to ad hoc circuit board 10 set terminals 14, can stretch out this left side case 60 outsides by these perforated holes 63 places with this terminal 14; Be provided with contact terminal 64 outwardly directed switchgears 65 in the storage tank 61 of this left side case 60 in addition, this switchgear 65 can supply this turning axle 30 and this rotation except be provided with one in the appropriate position. the ladder hole 66 that grating 50 left end work are established, the medial extremity place of this ladder hole 66 and be provided with one can be by the switching starter 67 of these ejector pin 40 roof pressures, promptly as shown in Figure 4, so the group via above-mentioned member is upright, and when utilizing suitable rivet 70 should left side case 60 to be combined into one with this right side case 20, as shown in Figure 3, can form a novel improvement optical encoder.

Because this rotating grating 50 is provided with the grating 52 that 64 roads are equidistant radial arrangement, in case so this grating 52 because of this rotating grating 50 just, when reversing function rotates in 13 of this infrared assembly 12 and this light quantity detection components, these ad hoc circuit board 10 set special terminals 14 can be exported the a-signal and the B signal (promptly as shown in Figure 5) of the suitable phase differential of two tools simultaneously, so that the particular solution code function of specific device (not shown) to be provided.With embodiment of the present utility model, because these rotating grating 50 set disks 53 are provided with the grating 52 that 64 roads are equidistant radial arrangement, so in case this rotating grating 50 is rotated when week, scrambler of the present utility model can outwards be exported the pulse signal of 64 groups of tool phase differential simultaneously, also just because of the more general common scrambler of the number of this pulse signal has more a lot of, so relatively, also can make in twos the phase differential between pulse signal keep comparatively stable status, and then make the utility model scrambler have preferable analytical capabilities.

In addition, because this light quantity detection components 13 is made of the semiconductor photosensory assembly,, and then improve sensitivity of the present utility model so it is to reduce the reaction time of the utility model optical encoder greatly.

In addition, because this rotating grating 50 and this infrared assembly 12 and 13 of this light quantity detection components do not have the Frotteurism that is in contact with one another, so scrambler of the present utility model is can not produce bigger noise when operation; Even this serviceable life that separation structure of friction also can modern the utility model scrambler mutually obtain the effect that promotes greatly; In fact test result can reach rotating function the serviceable life of the utility model scrambler 1,000,000 time, so it is that only to reach 30,000 revolution persons than scrambler commonly used much higher.

In addition,, the utility model rotating grating 50 separates not contacted structure, so it is to have per minute 300 rotating superelevation operating speeds because being with this infrared assembly 12 and this light quantity detection components 13; Review general scrambler commonly used, its speed of gyration then only can reach per hour 600 to 1000 rotating states, so effect of the present utility model is very to be better than general scrambler commonly used.

In addition, optical encoder shown in the utility model, wherein these left side case 60 set switchgears 65 also can be substituted by the fixedly projection 80 of a correspondence, promptly as shown in Figure 6, that is to say that this optical encoder also can be the structure of not establishing switchgear 65, fixedly also be provided with a ladder hole 81 that can supply this turning axle 30 and the 50 left end work of this rotating grating to establish on the projection 80 certainly.

In addition, because of this optical encoder is not provided with switchgear 65, so the set ejector pin 40 in these turning axle 30 centers also can be left out need not, that is to say that this moment, this turning axle 30 was to be not have a solid construction of medium pore canal.

In sum, because the disclosed optical encoder simple structure of the utility model, so its assembling operation is very simple; Say again, the pulse that when rotating a circle, can produce 64 groups of tool stable phase potential differences because of its rotating grating, so its resolution that can obtain is very good, in addition, also because its rotating grating can't produce the phenomenon that friction is touched with other assembly, so it is to increase the service life greatly, so the disclosed optical encoder of the utility model is the requirement that meets utility model patent fully, the request of special proposition patent.

Claims

1. an optical encoder mainly is made up of an ad hoc circuit board, a right side case, a turning axle, a rotating grating and a left side case, it is characterized in that:

This ad hoc circuit board is provided with a lateral trench, the outside of this lateral trench one end is respectively equipped with the infrared assembly and the light quantity detection components of a pair of mutual correspondence, this ad hoc circuit board left side ora terminalis is provided with the outward extending terminal of a plurality of levels, and its ora terminalis place, right side convexes with one and sets firmly the portion of inserting;

This right side case is provided with the storage tank of an opening towards a left side, the below of the set right side wall of this storage tank is provided with one can set firmly the jack portion that the portion of inserting plants and fixes for this, the right half side below that is installed in this storage tank of this ad hoc circuit board, the centre of this right side wall is provided with an axis hole that outwards runs through in addition, and the outboard peripheries of this axis hole further vertically extends to form a cylindrical shape carriage laterally;

This turning axle is provided with bulge loop and forms the grating canned paragraph that the cover be positioned at the right side is inserted shaft part and is positioned at the left side thereon, and this cover is inserted sheathed elastic collar of shaft part and packing ring, and by running through this axis hole and axle is located in the cylindrical shape carriage in this case inside, right side; The grating canned paragraph in this left side is in to cut on its outer peripheral face one or more vertical fastening plane; This turning axle is provided with the medium pore canal that runs through its central shaft, and the two ends of this medium pore canal further are respectively equipped with stepped hole slot, and an ejector pin is inserted to live by the outer end resilient sleeve of this turning axle and is located in this medium pore canal;

This rotating grating is provided with a hollow cylinder that can be nested with at the set grating canned paragraph of this turning axle place, this hollow cylinder is provided with a disk that is equipped with the proper number grating, the grating that this disk ring is established is positioned in the middle of the corresponding position of infrared assembly and light quantity detection components, and the below of this disk cover inserts in the lateral trench of this ad hoc circuit board;

This left side case is provided with corresponding to right side case and opening and accommodates this half side storage tank in ad hoc circuit board left side towards right, confession, the set left side wall of this left side case is provided with a plurality of perforated holes corresponding to ad hoc circuit board terminals, and this terminal stretches out this case outside, left side by the perforated holes place; Be provided with the outwardly directed switchgear of contact terminal in the storage tank of this left side case, this switchgear is provided with the ladder hole that supplies this turning axle and the work of rotating grating left end to establish, and the medial extremity place of this ladder hole is provided with one can be by the switching starter of this ejector pin roof pressure.

2. according to the described optical encoder of claim 1, it is characterized in that: the set switchgear of this left side case also can be substituted by the fixedly projection of a correspondence, and fixedly also is provided with a ladder hole that can supply this turning axle and this rotating grating left end work to establish on the projection.

3. according to the described optical encoder of claim 2, it is characterized in that: this ejector pin can be left out need not, this turning axle can be does not have a solid construction of medium pore canal.

4, according to claim 1 or 2 or 3 described optical encoders, it is characterized in that: the raster count of this rotating grating is the structure of the equidistant radial arrangement in 64 roads.