CN220153599U - Optical path structure and mouse for optical encoder - Google Patents

Abstract

The utility model discloses an optical path structure and a mouse used in an optical encoder, wherein a roller is provided with a circular ring-shaped accommodating cavity which is opened towards one side, a hollow cylindrical grating is arranged at the opening of the accommodating cavity, the roller rotates to drive the cylindrical grating to trigger an optical module to generate signal output, a plurality of light transmission openings are uniformly arranged at intervals on the cylindrical grating around a wall body towards the bottom of one side of the opening of the accommodating cavity, a light-emitting element and a photosensitive element are electrically separated at two sides of the light transmission opening, a light shielding structural member is arranged at one side, close to the light-emitting element, towards the photosensitive element, and a light transmission narrow groove is arranged on the light shielding structural member, so that light emitted by the light-emitting element can only pass through the light transmission narrow groove to the photosensitive element. According to the utility model, the shading structure is added in the optical encoder, so that the scattering of light rays of the light-emitting element can be eliminated, the sensitivity of the encoder is improved, and the use feeling of a user is improved.

Description

Optical path structure and mouse for optical encoder

Technical Field

The utility model relates to the field of encoders, in particular to an optical path structure and a mouse used in an optical encoder.

Background

The encoder senses the position by using an optical or magnetic or mechanical contact, converts the position into an electric signal, and outputs the electric signal to the driver as a feedback signal when the driver controls the position. The motion mode can be classified into a rotary encoder or a linear encoder. Rotary encoders convert a rotational position or amount of rotation into an analog or digital electrical signal, typically mounted on a rotating object, such as a motor shaft. Linear encoders convert linear position or linear displacement into electrical signals in a similar manner. At present, the encoder is widely applied to machine tools, robots and semiconductor devices to be used as a sensing module for positioning a servo motor, and the accuracy of the encoder can directly influence the positioning performance of mechanical devices.

For optical encoders, the encoding disk (grating disk) has patterned optically transparent blocks. When the light source irradiates, the relative motion between the light detector and the coding disc can enable the light detector to receive different light quantities, and the linear displacement or the rotation angle is judged according to the change of the light quantities.

The light path between the light emitting element and the photosensitive element of the existing optical encoder is normally unblocked, when the through hole of the encoding disk passes between the light emitting element and the photosensitive element, a light path is formed, a photoelectric signal is output, when the grating element on the encoding disk passes between the light emitting element and the photosensitive element, the light emitted by the light emitting element is blocked by the grating element, but the light of the light emitting element can be scattered, the grating element can not completely block the light path between the light emitting element and the photosensitive element, so that the sensitivity of the encoder can be influenced, if the width of the grating element is increased, the precision of the encoder can be influenced.

Disclosure of Invention

In view of the above, the present utility model aims to provide an optical path structure for use in an optical encoder that improves sensitivity.

In order to achieve the technical purpose, the scheme of the utility model is as follows: the utility model provides an optical path structure for among optical encoder, includes the pedestal, installs the gyro wheel on the pedestal, comprises light emitting component and photosensitive element's optical module, the gyro wheel has towards one side open-ended ring shape holding chamber, installs a hollow cylinder grating from the opening part of holding chamber, and the gyro wheel rotation drives cylinder grating and triggers optical module and produce signal output, and a plurality of printing opacity openings have been seted up to the bottom of this cylinder grating towards holding chamber open side surround wall evenly spaced, light emitting component and photosensitive element electricity are separated into printing opacity open both sides, and the side that the next-door neighbour light emitting component towards photosensitive element is provided with a shading structure, and a printing opacity narrow slot has been seted up so that the light that light emitting component sent can only follow this printing opacity narrow slot and pass through printing opacity opening to photosensitive element.

Preferably, the base is provided with a mounting groove, and the shading structural member is mounted on the mounting groove and is arranged towards the direction of the cylindrical grating.

Preferably, the shading structural member is connected to the seat body through glue or a hook.

Preferably, the light shielding structural member is a U-shaped structure with a light transmitting narrow groove, and the height of the U-shaped structure is higher than that of the optical module.

Preferably, the width of the light-transmitting narrow groove is 1/3 of that of the light-emitting element.

The utility model also provides a scheme that: the mouse comprises an optical encoder, and the optical encoder adopts the optical path structure of any one of the above.

The beneficial effects of the utility model are as follows: according to the utility model, the shading structure is added in the optical encoder, so that the scattering of light rays of the light-emitting element can be eliminated, the sensitivity of the encoder is improved, and the use feeling of a user is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of the structure of the circuit board and the base of the present utility model;

FIG. 3 is an enlarged view of a portion of a shade structure according to the present utility model;

fig. 4 is a schematic structural diagram of a light shielding structure and an optical module according to the present utility model.

In the figure: 1. a base; 101. a mounting groove; 2. a roller; 3. a light emitting element; 4. a photosensitive element; 5. a receiving chamber; 6. a cylindrical grating; 601. a light-transmitting opening; 7. a light shielding structure; 701. a light-transmitting narrow groove; 8. a circuit board.

Description of the embodiments

The utility model will now be described in further detail with reference to the drawings and to specific examples. For a clear and complete description of the technical solutions, the following examples are chosen for illustration; the following examples are some of the examples of the present utility model; other embodiments, which are obtained based on the present utility model without making any inventive effort, are within the scope of the present utility model.

In the following embodiments, it should be noted that, the terms "upper", "lower", "left", "right", "inner", "outer", "top/bottom", and the like are all based on the orientation or positional relationship shown in the drawings, and are merely for the sake of clarity in describing the present embodiment, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, and therefore, should not be construed as limiting the utility model. Meanwhile, the "first" and "second" in the embodiments are used for distinguishing descriptive purposes only and are not represented as indicating or implying relative importance.

As shown in fig. 1-4, an embodiment of the present utility model is an optical path structure for an optical encoder, including a base 1, a roller 2 mounted on the base 1, an optical module composed of a light emitting element 3 and a photosensitive element 4, the roller 2 has a circular receiving cavity 5 opened to one side, a hollow cylindrical grating 6 is mounted at the opening of the receiving cavity 5, the roller 2 rotates to drive the cylindrical grating 6 to trigger the optical module to generate signal output, a plurality of light transmitting openings 601 are uniformly spaced around the wall at the bottom of the side of the cylindrical grating 6 facing the opening of the receiving cavity 5, the light emitting element 3 and the photosensitive element 4 are electrically separated on two sides of the light transmitting openings 601, a light shielding structure 7 is disposed adjacent to the side of the light emitting element 3 facing the photosensitive element 4, and the light shielding structure 7 is provided with a light transmitting narrow groove 701 so that the light emitted by the light emitting element 3 can only be emitted from the light transmitting narrow groove 701 to the photosensitive element 4 via the light transmitting openings 601.

Specifically, a mounting groove 101 is formed in the base 1, the light shielding structural member 7 is mounted on the mounting groove 101 and is arranged towards the direction of the cylindrical grating 6, specifically, a circuit board 8 is mounted on the mounting groove 101 in the embodiment, the light emitting element 3 and the photosensitive element 4 are mounted on the circuit board 8 and are located on two sides of the light shielding structural member 7, and the light shielding structural member 7 is connected to the base 1 through glue, hooks or other connectors.

The light shielding structure member 7 is a U-shaped structure having a light-transmitting narrow groove 701, the height of which is higher than the height of the optical module, and preferably, the width of the light-transmitting narrow groove 701 is 1/3 of the light emitting element 3.

The utility model also provides a scheme that: the optical encoder adopts the optical path structure of any one of the above, so that the sensitivity of the mouse can be improved, and the experience of a user can be improved.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the utility model, but any minor modifications, equivalents, and improvements made to the above embodiments according to the technical principles of the present utility model should be included in the scope of the technical solutions of the present utility model.

Claims (6)

1. The utility model provides a light path structure for among optical encoder, includes the pedestal, installs the gyro wheel on the pedestal, comprises light emitting component and photosensitive element's optical module, the gyro wheel has towards one side open-ended ring shape holding chamber, installs a hollow cylinder grating from the opening part of holding chamber, and the gyro wheel rotation drives cylinder grating and triggers optical module and produce signal output, its characterized in that, this cylinder grating encircles the wall evenly spaced of the bottom of holding chamber open side and has offered a plurality of printing opacity openings, light emitting component and photosensitive element electricity are separated into printing opacity open both sides, and the side that the next-door neighbour light emitting component faced photosensitive element is provided with a shading structure, and this shading structure has offered a printing opacity narrow groove and has made the light that light emitting component sent can only be followed this printing opacity narrow groove and passed through printing opacity opening to the photosensitive element.

2. The optical path structure for use in an optical encoder as claimed in claim 1, wherein: the base is provided with a mounting groove, and the shading structural member is mounted on the mounting groove and is arranged towards the direction of the cylindrical grating.

3. The optical path structure for use in an optical encoder as claimed in claim 2, wherein: the shading structural member is connected to the seat body through glue or a hook.

4. The optical path structure for use in an optical encoder as claimed in claim 2, wherein: the shading structural member is of a U-shaped structure with a light-transmitting narrow groove, and the height of the U-shaped structure is higher than that of the optical module.

5. The optical path structure for use in an optical encoder as claimed in claim 2, wherein: the width of the light-transmitting narrow groove is 1/3 of that of the light-emitting element.

6. A mouse comprising an optical encoder, wherein the optical encoder adopts the optical path structure of any one of claims 1-5.