CN219914463U - Improved optical encoder and mouse - Google Patents

Abstract

The utility model discloses an improved optical encoder and a mouse, 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 shading convex blocks extend out of the cylindrical grating towards the bottom of one side of the accommodating cavity at uniform intervals around a wall body, a light-emitting element and a photosensitive element are electrically connected to two sides of the shading convex blocks, the position of the flexible circuit board corresponding to the shading convex blocks is configured into a concave space-avoiding structure, and the bottom of the shading convex blocks extends into the concave space-avoiding structure. The optical modules are connected by adopting the concave space-avoiding structure to form space-avoiding positions, so that the light-shielding convex blocks of the roller can be extended more, better shielding of light rays of the light-emitting element is ensured, the sensitivity is improved, and the experience of a user is improved.

Description

Improved optical encoder and mouse

Technical Field

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

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 conventional optical pair tube assemblies are generally distributed on two sides of the coding disc, the coding disc changes the optical path when the optical pair tube assemblies move, the optical pair tube assemblies are attached to the circuit board, and when the coding disc rotates, in order not to touch the circuit board, tiny gaps exist between the bottom of the coding disc and the circuit board, and the gaps easily cause deviation influence on optical path transmission between the optical pair tube assemblies, so that the optical encoder is not sensitive and accurate enough to use, and therefore, an optical encoder capable of correcting the errors is needed.

Disclosure of Invention

The present utility model aims to provide an improved optical encoder with high sensitivity and high accuracy.

In order to achieve the technical purpose, the scheme of the utility model is as follows: the utility model provides an improved 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 accommodation chamber, installs a hollow cylinder grating from the opening part in accommodation chamber, and the gyro wheel rotation drives cylinder grating and triggers optical module and produce signal output, and the bottom of this cylinder grating towards accommodation chamber opening one side encircles the evenly spaced axial extension a plurality of shading lugs of wall body, light emitting component and photosensitive element electricity are connected on a flexible line way board and are separated into the both sides of shading lug, the flexible line way board corresponds the position structure of shading lug is the spill and keeps away empty structure, the bottom of shading lug stretch into in the spill keeps away empty structure.

Preferably, the base is provided with a mounting hole, and one end of the flexible circuit board is assembled on the base through the mounting hole.

Preferably, the concave space-avoiding structure of the flexible circuit board is a downward-bending arc-shaped structure, and the horizontal length of the arc-shaped structure is greater than the thickness of the shading convex block.

Preferably, the two ends of the concave space-avoiding structure are connecting plates, and the light-emitting element and the photosensitive element are respectively positioned on the connecting plates at the two ends of the concave space-avoiding structure.

Preferably, the bottom of the shading lug is lower than the connecting plate.

The utility model also provides a scheme that: a mouse employing the improved optical encoder of any of the above.

The beneficial effects of the utility model are as follows: the optical modules are connected by adopting the concave space-avoiding structure to form space-avoiding positions, so that the light-shielding convex blocks of the roller can be extended more, better shielding of light rays of the light-emitting element is ensured, the sensitivity is improved, and the experience of a user is improved.

Drawings

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

FIG. 2 is a diagram showing the positional relationship between a flexible printed circuit and a base in the present utility model;

FIG. 3 is a diagram showing the positional relationship between the roller and the flexible printed circuit board according to the present utility model;

FIG. 4 is an enlarged view of a portion of the flexible circuit board and the housing of the present utility model;

fig. 5 is a partial enlarged view of the flexible circuit board and the optical module according to the present utility model.

In the figure: 1. a base; 101. a mounting hole; 2. a roller; 3. a light emitting element; 4. a photosensitive element; 5. a receiving chamber; 6. a cylindrical grating; 601. a light shielding bump; 7. a flexible circuit board; 701. a concave space-avoiding structure; 702. and (5) connecting a plate.

Detailed Description

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. 1-5, the embodiment of the present utility model is an improved optical encoder, which comprises a base 1, a roller 2 mounted on the base 1, and an optical module composed of a light emitting element 3 and a photosensitive element 4, wherein the roller 2 has a circular-ring-shaped accommodating cavity 5 opened towards one side, a hollow cylindrical grating 6 is installed at the opening of the accommodating 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 shielding bumps 601 extend from the cylindrical grating 6 towards the bottom of the opening side of the accommodating cavity 5 at uniform intervals around the wall body in the axial direction, the light emitting element 3 and the photosensitive element 4 are electrically connected to two sides of the light shielding bumps 601, the position of the flexible circuit board 7 corresponding to the light shielding bumps 601 is configured as a concave space-avoiding structure 701, and the bottom of the light shielding bumps 601 extends into the concave space-avoiding structure 701.

The flexible circuit board 7 is arranged on the base body 1, the base body 1 is provided with the mounting hole 101, one end of the flexible circuit board 7 is assembled on the base body 1 through the mounting hole 101, the flexible circuit board 7 is adhered on the base body 1, the concave clearance structure 701 of the flexible circuit board 7 is of a downward bent arc-shaped structure, the base body 1 is provided with a groove corresponding to the arc-shaped structure, and the horizontal length of the arc-shaped structure is larger than the thickness of the shading lug 601, so that the shading lug 601 can rotate between the concave clearance structures.

The optical module patch is electrically connected to the flexible circuit board 7, the connection plates 702 are arranged at the two ends of the concave space-avoiding structure, the circuits at the two sides are communicated through the concave space-avoiding structure 701, the light-emitting element 3 and the photosensitive element 4 are respectively arranged on the connection plates 702 at the two ends of the concave space-avoiding structure 701, the bottom of the shading lug 601 is lower than the connection plates 702, the shading lug 601 can completely block the light path between the light-emitting element 3 and the photosensitive element 4, gaps are eliminated, and sensitivity is improved.

The utility model also provides a mouse which adopts the optical encoder improved by the scheme and has the advantages of high precision and high sensitivity.

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. An improved optical encoder, characterized by: the light-shielding device comprises a base body, a roller wheel arranged on the base body, and an optical module composed of a light-emitting element and a photosensitive element, wherein the roller wheel 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, and the roller wheel rotates to drive the cylindrical grating to trigger the optical module to generate signal output.

2. The improved optical encoder of claim 1, wherein: the base is provided with a mounting hole, and one end of the flexible circuit board passes through the mounting hole and is assembled on the base.

3. The improved optical encoder of claim 2, wherein: the concave clearance structure of the flexible circuit board is a downward-bending arc structure, and the horizontal length of the arc structure is greater than the thickness of the shading convex block.

4. An improved optical encoder as defined in claim 3, wherein: the two ends of the concave space-avoiding structure are connecting plates, and the light-emitting element and the photosensitive element are respectively positioned on the connecting plates at the two ends of the concave space-avoiding structure.

5. The improved optical encoder of claim 4, wherein: the bottom of the shading lug is lower than the connecting plate.

6. A mouse, characterized in that: the mouse employing the improved optical encoder of any one of claims 1-5.