CN219106173U - Photocell assembly and vibrating mirror motor thereof - Google Patents

Abstract

The application relates to a photocell assembly and galvanometer motor thereof, wherein photocell assembly includes the PCB board and sets up photocell assembly on the PCB board, one side of PCB board is equipped with the winding displacement that is used for being connected with external equipment, be equipped with the mask rather than the shape corresponds on the photocell assembly, set up the light trap on the mask and be used for the pivot of galvanometer motor to wear to establish the through-hole. According to the light source module, the mask is arranged on the photocell and the light holes which are corresponding to the light shielding plate and are suitable in range are formed in the mask, so that the edges of the photocell are effectively shielded, the exposed area of the photocell can meet the full-quadrant size requirement, the influence caused by insufficient light irradiation intensity due to the edges is eliminated, and untreated system noise is eliminated, so that the precision and the working efficiency of products are improved.

Description

Photocell assembly and vibrating mirror motor thereof

Technical Field

The present application relates to the field of laser galvanometers, and in particular to a photovoltaic cell assembly and a galvanometer motor thereof.

Background

The photocell assembly is one of the important component parts of the galvanometer motor, a light shielding plate is arranged between the light source and the photocell, when the light shielding plate rotates, the area of the surface of the photocell for receiving light changes, and the generated current also changes, but when the photocell assembly is irradiated by the light source, the intensity of the light received by the photocell positioned below the light source is higher than that received by the photocell positioned at the edge of the light source, so that the intensity of the light source received by the photocell assembly is different, the precision of products is reduced, and the requirements of high-end industries cannot be met. The effective area of the photocell needs to be set in a reasonable and effective range, and if the range is too small, the light receiving requirement cannot be met; if the range is too large, an additional exposed unit area can generate untreated system noise, and further, the working accuracy and the working efficiency of the galvanometer motor are adversely affected.

Disclosure of Invention

To the technical problem that exists among the prior art, this application provides a photocell subassembly, be in including PCB board and setting photocell group on the PCB board, one side of PCB board is equipped with the winding displacement that is used for being connected with external equipment, be equipped with the mask rather than the shape corresponds on the photocell group, set up the light trap on the mask and be used for vibrating mirror motor's pivot to wear to establish the through-hole. Compared with the prior art, the light holes with proper shapes and light shielding plates are formed in the mask through the mask arranged on the photocell, the edges of the photocell are effectively shielded, the exposed area of the photocell can meet the full-quadrant size requirement, the influence caused by insufficient light irradiation intensity due to the edges is eliminated, and untreated system noise is eliminated, so that the precision and the working efficiency of products are improved.

Optionally, the PCB includes a PCB substrate and a reinforcing plate, the photovoltaic cell group is fixed on the PCB substrate, and the flat cable is connected with the reinforcing plate; the through holes are formed in the middle of the PCB substrate, the photocell group comprises a plurality of photocell monomers, and the photocell monomers are symmetrically and circumferentially arranged by taking the through holes as centers.

Optionally, the shape of the light hole corresponds to the shape of a light shielding plate arranged on the rotating shaft of the galvanometer motor.

Optionally, the light holes are rectangular, circular or fan-shaped.

Optionally, the number of the light holes is two, and the two light holes are symmetrically formed on the mask by taking the through holes as centers.

Optionally, the photocell unit is square in shape and is arranged in 4.

Optionally, the photocell monomer is a PIN silicon diode packaged by SMD.

Optionally, the mask is made of a non-reflective opaque material.

Optionally, the mask is made of nickel alloy material, and is arranged on the photocell group through an SMT (surface Mount technology).

In a second aspect, the present application proposes a galvanometer motor, including drive-by-wire unit, casing unit and the lens unit that connects gradually, its characterized in that, including the photocell subassembly as described above in the drive-by-wire unit, photocell subassembly receives the emission light of light source in the drive-by-wire unit, the output is in the rotatable or the oscillation angle of the pivot of galvanometer motor in the casing unit.

Optionally, the casing unit includes the casing, the inside rotor subassembly that is equipped with of casing, the rotor subassembly includes the pivot, the fixed light screen of tip of pivot, the setting position of light screen is located the light source with set up on the photocell subassembly between the mask.

Optionally, a setting distance between the light shielding plate and the mask is: 0.1-0.4 mm.

Optionally, the light shielding plate includes a fixing portion for fixing on the end portion of the rotating shaft and a shielding portion for shielding the light emitted by the light source, and the shape of the shielding portion is set corresponding to the shape of the light hole.

Optionally, the shielding part and the light hole are both fan-shaped.

Optionally, the fan-shaped outer diameter of the shielding part is larger than the fan-shaped outer diameter of the light hole.

Optionally, the light shielding plate is made of a non-reflective opaque material.

In summary, by arranging a mask between the light shielding plate and the photocell, and arranging the light holes with proper shapes and proper ranges corresponding to the light shielding plate on the mask, the photocell is changed into a fan-shaped light receiving area, the edge area of the photocell can be shielded by the mask, the exposed area of the photocell can be enough to meet the full-quadrant size requirement, and the radiation irradiation weakened by a light source is prevented; the influence caused by insufficient light irradiation intensity affected by the edge and untreated system noise are eliminated, so that the precision and the working efficiency of the galvanometer motor are improved.

Drawings

Preferred embodiments of the present application will be described in further detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic view of the overall structure of a photovoltaic cell assembly according to one embodiment of the present application;

FIG. 2 is a schematic illustration of a split structure of a photovoltaic cell assembly according to one embodiment of the present application;

FIG. 3 is a schematic diagram of a galvanometer motor according to one embodiment of the application; and

FIG. 4 is a schematic perspective view of a subassembly of a galvanometer motor including a drive-by-wire unit and a housing unit;

FIG. 5 is a cross-sectional view taken along A-A of FIG. 4;

FIG. 6 is a schematic view of a shade plate structure according to one embodiment of the present application; and

FIG. 7 is a schematic diagram of the positional relationship between a photovoltaic module and a shadow mask.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the application may be practiced. In the drawings, like reference numerals describe substantially similar components throughout the different views. Various specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the present application. It is to be understood that other embodiments may be utilized or structural, logical, or electrical changes may be made to the embodiments of the present application.

Fig. 1 is a schematic overall structure of a photocell assembly according to an embodiment of the present application, fig. 2 is a schematic split structure of a photocell assembly according to an embodiment of the present application, and referring to fig. 1 and fig. 2, the photocell assembly provided by the present application includes a PCB board 101 and a photocell assembly 102 disposed on the PCB board 101, a flat cable 103 for connecting with an external device is disposed on one side of the PCB board 101, a mask 104 corresponding to the shape of the photocell assembly 102 is disposed on the photocell assembly 102, and a light hole 105 and a through hole 106 for penetrating a rotating shaft of a galvanometer motor are disposed on the mask 104.

The photocell assembly provided by the application shields the edge area of the photocell assembly through arranging the mask on the photocell assembly, and radiation weakened by the light source is prevented. The influence caused by the influence of the edges on the insufficient light irradiation intensity is eliminated, so that the precision of the product is improved.

As shown in fig. 2, the PCB 101 includes a PCB substrate 101-1 and a stiffener 101-2, the photovoltaic cell 102 is fixed on the PCB substrate 101-1, and the flat cable 103 is connected to the stiffener 101-2; the through hole 106 is formed in the middle of the PCB substrate 101-1, the photovoltaic cell group 102 includes a plurality of photovoltaic cells 102-1, and the photovoltaic cells 102-1 are symmetrically disposed around the through hole 106.

In the embodiment shown in fig. 2, the photocell unit 102-1 is provided in a square shape, and is provided in a number of 4. Of course, the shape of the photovoltaic cell 102-1 is not limited to square, and may be other shapes according to different practical needs. Typically, the photocell unit employs SMD packaged PIN silicon diodes that are capable of receiving infrared light over a range of wavelengths.

In order to make the mask achieve its setting effect, the shape of the light hole 105 formed in the mask 104 should be set corresponding to the shape of the light shielding plate 400 disposed on the rotating shaft of the galvanometer motor. In different embodiments, the light shielding plate 400 may be selected according to actual needs, and the light transmitting holes 105 may be configured to have a shape corresponding to the light shielding plate, for example: rectangular, circular or fan-shaped.

As shown in the embodiment of fig. 2, the number of the light holes 105 is two, and the two light holes 105 are symmetrically formed on the mask 104 with the through hole 106 as a center. Thus, the photocell group 102 can receive the light emitted by the light source through the gap between the light shielding plate 400 and the light transmitting hole 105 in the swinging process of the light shielding plate 400, convert the received light signal into an electric signal and output the rotatable or oscillatable angle of the rotating shaft of the galvanometer motor. In other embodiments, the number and arrangement positions of the light holes can be adaptively adjusted as required.

In the embodiment shown in fig. 2, the mask 104 is made of a non-reflective opaque material. So that the area covered by the non-light-transmitting apertures of the mask 104 is not exposed to the light source. Typically, the mask 104 may be made of a nickel alloy material, and is disposed on the photovoltaic cell by an SMT process. In other embodiments, other non-reflective opaque materials may be selected.

The photocell assembly provided by the application has the advantages that the mask is creatively arranged on the photocell assembly, the light holes are formed in the mask, the area covered by the light holes can be irradiated by a light source, the area covered by the non-light holes cannot be irradiated by the light source, the edge area of the photocell is shielded by the mask, and radiation irradiation weakened by the light source is prevented. The influence caused by the influence of the edges on the insufficient light irradiation intensity is eliminated, so that the precision of the galvanometer motor is improved.

Fig. 3 is a schematic structural diagram of a galvanometer motor according to an embodiment of the present application, as shown in fig. 3, the galvanometer motor proposed in the present application includes a wire control unit 301, a housing unit 302, and a lens unit 303 connected in sequence, where the wire control unit 301 includes a photocell assembly as described above, and the photocell assembly receives light emitted by a light source in the wire control unit 301, and outputs a rotatable or oscillatable angle of a rotation shaft of the galvanometer motor provided in the housing unit 302.

Fig. 4 is a schematic perspective view of a sub-assembly of the galvanometer motor including a drive-by-wire unit and a housing unit, fig. 5 is a cross-sectional view taken along A-A of fig. 4, and referring to fig. 4 and 5, the housing unit 302 includes a housing 302-1, a rotor assembly is disposed in the housing 302-1, the rotor assembly includes a rotating shaft 302-2, a light shielding plate 400 is fixed at an end of the rotating shaft 302-2, and a position of the light shielding plate 400 is located between the light source 501 and the mask 104 disposed on the photocell assembly.

In order to avoid that the photocell 102 receives unnecessary stray light, the light shielding plate 400 should be disposed as close to the photocell 102 as possible, and in general, the distance between the light shielding plate 400 and the mask 104 is as follows: 0.1-0.4 mm. This allows the photocell 102 to receive all of the active light, thereby increasing the intensity of the received radiation and increasing the signal generation.

Fig. 6 is a schematic diagram of a light shielding plate structure according to an embodiment of the present application, as shown in fig. 5 and in combination with fig. 6, the light shielding plate 400 includes a fixing portion 401 fixed on an end portion of the rotating shaft 302-2 and a shielding portion 402 for shielding light emitted by the light source, where a shape of the shielding portion 402 corresponds to a shape of the light transmitting hole 105, so that when the light shielding plate 400 swings under the driving of rotation of the rotating shaft 301-2, a more effective shielding effect is formed between the light shielding plate 400 and the light transmitting hole 105, which is beneficial to receiving light by the photocell 102. In the embodiment shown in fig. 1 and fig. 2 and in combination with fig. 6, the shielding portion 402 and the light hole 105 are both fan-shaped, and the fan-shaped outer diameter of the shielding portion 402 is larger than the fan-shaped outer diameter of the light hole 105, so that when the light shielding plate 400 rotates and swings to a position corresponding to the light hole 105, the light hole 105 can be completely shielded in a radial direction, so that the photocell group 102 can only receive light emitted by the light source from the light hole 105 and the shielding portion 402 in a region with a poor fan-shaped area in a circumferential direction, and the intensity of received light radiation and the accuracy of signals are ensured. In order to achieve better shading effect, the shading plate 400 is made of non-reflective opaque material.

FIG. 7 is a schematic diagram of the positional relationship between a photovoltaic module and a shadow mask. The following briefly describes the structural positional relationship and the operation process between the photovoltaic module and the light shielding plate with reference to fig. 7. In the embodiment shown in fig. 7, the photocell 102 is composed of 4 photocell units 102-1, a mask 104 is provided on the photocell 102, and two fan-shaped light holes 105 are provided on the mask 104. Through the above structural arrangement, a large-area sector-shaped light receiving area is formed on the upper surface of the photocell 102, the angle range of the sector-shaped light receiving area should meet certain requirements, the range of the sector-shaped area cannot be too narrow, and the range needs to be slightly larger than the expected angle range of the photocell; however, the range of the sector area cannot be too wide, so long as the full quadrant size can be achieved, otherwise system noise can be generated due to the too large range.

The light source 501 is capable of illuminating the photovoltaic cell 102, and the output of the photovoltaic cell 102 is proportional to the area exposed to light at a constant intensity. The currents of the two pairs of photocell units 102-1, which are diametrically opposite in current direction, are added and then connected to opposite sides of the differential amplifier to generate a final output signal, which represents the rotation angle of the rotatable or oscillatable shaft of the oscillating mirror motor, of the photocell unit 102. That is, when the rotation shaft of the galvanometer motor drives the light shielding plate to rotate, the light source forms four fan-shaped light spots on the four photoelectric cell units 102-1 respectively through the light transmitting holes 105, wherein, as shown in fig. 7, the light spot areas on the two diagonally arranged photoelectric cell units 102-1 respectively positioned at the lower left and the upper right are increased, the light spot areas of the other two diagonally arranged photoelectric cell units 102-1 respectively positioned at the upper left and the lower right are reduced, and as the four photoelectric cell units 102-1 are respectively connected in series into one group and then connected in parallel, the photoelectric cell units 102-1 respectively form one sensor pair, and when the output of one sensor pair is increased, the output of the other sensor pair is reduced; these summed outputs are then connected to opposite sides of the differential amplifier to produce the final directional linear output result. The utility model provides a galvanometer motor, on the basis that above-mentioned structure set up, compare with current structure galvanometer motor, output's linearity has improved more than 60%.

To sum up, this application has set up the mask on photocell group originality to set up the light trap on the mask, make the region that is covered by the light trap can receive the illumination of light source, the region that the non-light trap covered can not receive the illumination of light source, and the mask shelters from photocell marginal zone, has prevented the ray radiation that the light source weakens. The influence caused by the influence of the edges on the insufficient light irradiation intensity is eliminated, so that the precision of the galvanometer motor is improved.

The above embodiments are provided for illustrating the present application and are not intended to limit the present application, and various changes and modifications can be made by one skilled in the relevant art without departing from the scope of the present application, therefore, all equivalent technical solutions shall fall within the scope of the present disclosure.

Claims (16)

1. The utility model provides a photocell assembly, is in including PCB board and setting photocell group on the PCB board, one side of PCB board is equipped with the winding displacement that is used for being connected with external equipment, its characterized in that, be equipped with the mask rather than the shape correspondence on the photocell group, set up the light trap on the mask and be used for vibrating mirror motor's pivot to wear to establish the through-hole.

2. The photovoltaic cell assembly of claim 1, wherein the PCB board comprises a PCB substrate and a stiffener, the photovoltaic cell assembly being secured to the PCB substrate, the flat cable being connected to the stiffener; the through holes are formed in the middle of the PCB substrate, the photocell group comprises a plurality of photocell monomers, and the photocell monomers are symmetrically and circumferentially arranged by taking the through holes as centers.

3. The photocell assembly as claimed in claim 1, wherein the light transmission holes have a shape corresponding to a shape of a light shielding plate provided on the rotation shaft of the galvanometer motor.

4. The photovoltaic cell assembly of claim 3, wherein the light-transmitting aperture is rectangular, circular or fan-shaped.

5. The photocell assembly according to claim 3, wherein the number of the light holes is two, and the two light holes are symmetrically formed on the mask with the through holes as a center.

6. The photovoltaic cell assembly according to claim 2, wherein the photovoltaic cells are square in shape and are provided in a number of 4.

7. The photocell assembly as claimed in claim 2, wherein the photocell cells are SMD packaged PIN silicon diodes.

8. The photovoltaic cell assembly of claim 1, wherein the mask is made of a non-reflective opaque material.

9. The photovoltaic cell module of claim 1, wherein the mask is made of a nickel alloy material and is disposed on the photovoltaic cell module by an SMT die attach process.

10. A galvanometer motor comprising a drive-by-wire unit, a housing unit and a lens unit which are sequentially connected, wherein the drive-by-wire unit comprises a photocell assembly as set forth in any one of claims 1-9, the photocell assembly receives the emitted light of a light source in the drive-by-wire unit, and outputs a rotatable or oscillatable angle of a rotating shaft of the galvanometer motor disposed in the housing unit.

11. The galvanometer motor according to claim 10, wherein said housing unit includes a housing having a rotor assembly disposed therein, said rotor assembly including a shaft having an end with a light shield secured thereto, said light shield being disposed between said light source and said mask disposed over said photovoltaic assembly.

12. The galvanometer motor according to claim 11, wherein a set distance between the light shielding plate and the mask is: 0.1-0.4 mm.

13. The galvanometer motor according to claim 11, wherein the light shielding plate includes a fixing portion for fixing on an end portion of the rotation shaft and a shielding portion for shielding emitted light of the light source, and a shape of the shielding portion is provided corresponding to a shape of the light transmitting hole.

14. The galvanometer motor according to claim 13, wherein said shielding portion and said light transmission hole are both fan-shaped.

15. The galvanometer motor according to claim 14, wherein a fan-shaped outer diameter of the shielding portion is larger than a fan-shaped outer diameter of the light hole.

16. The galvanometer motor of claim 11, wherein the shutter plate is a non-reflective opaque material.

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