Anti-interference photoelectric switch

Abstract

The utility model provides an anti-interference photoelectric switch. The anti-interference photoelectric switch comprises a shell; the shell comprises a lower shell and an upper shell, one end of the lower shell and one end of the upper shell are fixed to the two ends of the stand column respectively, a lower light-transmitting hole and an upper light-transmitting hole which are the same in shape and size are machined in the opposite faces of the lower shell and the upper shell respectively, and a receiving diode and a light-emitting diode are installed in the lower shell and the upper shell respectively. According to the photoelectric switch, the diodes which are relatively parallel are used, the lead wire can directly extend into the shell from the side surface of the shell to be connected with the diodes, so that the photoelectric switch is simpler in structure, and the shielding device is additionally arranged on the limiting device to be combined with the shell, so that the four side surfaces of each diode are shielded, and the influence of natural light on the photoelectric switch is reduced.

Description

Technical Field

[0001] The utility model relates to an anti-interference optoelectronic switch. Background Art

[0002] An optoelectronic switch generally includes a transmitting diode and a receiving diode, or a circuit and a structure matched therewith. The working principle of the receiving diode is to increase the concentration of carriers inside a semiconductor device by photon excitation of the carriers, improve the conductivity of the semiconductor, and thus realize the switching function. However, in the existing optoelectronic switches, due to the existence of certain natural light in the use environment, this natural light is diffusely reflected onto the receiving diode, objectively increasing the concentration of carriers, and greatly reducing the cut-off effect of the original cut-off state. For example, an integrated small optoelectronic switch disclosed in CN210246706U wraps the side parts of the light-emitting and receiving parts of the optoelectronic switch with a housing to reduce the influence of natural light received by it. However, its diodes extend into the housing from the upper and lower sides of the housing, and the two leads are led out from the side of the housing; this requires the induction part to be concentric with the hole during the processing, and more working steps and equipment toolings are required during mass production, and an additional transfer device is also required between its diodes and leads. Content of the Utility Model

[0003] To solve the above technical problems, the utility model provides an anti-interference optoelectronic switch.

[0004] The utility model is realized through the following technical solutions.

[0005] An anti-interference optoelectronic switch provided by the utility model includes a housing; the housing includes a lower housing and an upper housing. One ends of the lower housing and the upper housing are respectively fixed at both ends of a column. Lower light-transmitting holes and upper light-transmitting holes with the same shape and size are respectively processed on the opposite surfaces of the lower housing and the upper housing. A receiving diode and a light-emitting diode are respectively installed in the lower housing and the upper housing. The receiving part of the receiving diode and the light-emitting part of the light-emitting diode are respectively placed at the ends of the lower light-transmitting hole and the upper light-transmitting hole far away from the column. A circuit board is also installed on the end surface of the column facing away from the upper housing or the lower light-transmitting hole. The lead ends of the receiving diode and the light-emitting diode respectively pass through the end surface of the circuit board and are fixedly connected to the circuit board. An anti-interference component is also arranged in the lower housing to shield one side of the receiving diode relative to the column.

[0006] The anti-interference component includes a light-shielding strip and a support block. The support block includes a limit protrusion and a backing plate. The limit protrusion is fixed at one end of the backing plate. A limit groove is processed at the center of the top end of the backing plate. The light-shielding strip is arranged in the limit groove. The receiving diode is installed between the light-shielding strip and the backing plate.

[0007] The light-shielding strip is in a semi-circular arc shape. The diameter of the light-shielding strip is the same as the width of the limiting groove. One end of the light-shielding strip extends into the lower housing, and the end face of its end contacts the side face of the receiving component on the receiving diode.

[0008] The lower housing and the upper housing are also respectively provided with a relatively parallel lower cavity and an upper light-transmitting hole. The shape and size of the bottom of the upper light-transmitting hole are the same as those of the light-emitting diode. The bottom of the lower cavity is also processed with a lower limiting groove. The spatial structure formed by the connection of the lower cavity and the lower limiting groove is the same as the structural shape and size formed by the receiving diode and the support block.

[0009] A limiting circular groove is also processed at the connection of the upright column and the lower housing. The cross-sectional size of the limiting circular groove is the same as that of the light-shielding strip.

[0010] The receiving diode and the light-emitting diode are integrally in a flat plate structure. The light-emitting component and the receiving component are respectively perpendicular to the light-emitting diode and the receiving diode. The leads of the receiving diode and the light-emitting diode are fixedly connected in parallel on one end face thereof.

[0011] On both side surfaces of one end of the lower housing connected to the upright column, side ears are respectively fixedly connected. A circular through hole is processed at the center of the side ears.

[0012] The beneficial effects of the present utility model are as follows: By using relatively parallel diodes, the leads can directly extend from the side surface of the housing to be connected to the diodes, making the structure of the photoelectric switch simpler. And by adding a shielding device to the limiting device and combining it with the housing, all four side surfaces of the diode are shielded, reducing the influence of natural light on the photoelectric switch. Description of the Drawings

[0013] Figure 1 It is a structural schematic diagram of the present utility model;

[0014] Figure 2 It is an exploded structural schematic diagram of the present utility model;

[0015] Figure 3 It is a structural schematic diagram of the housing of the present utility model;

[0016] In the figure: 1 - housing, 11 - lower housing, 12 - upright column, 13 - upper housing, 14 - lower light-transmitting hole, 15 - lower cavity, 16 - limiting circular groove, 17 - lower limiting groove, 18 - upper light-transmitting hole, 19 - upper limiting groove, 110 - circuit board cavity, 2 - receiving diode, 3 - anti-interference component, 31 - light-shielding strip, 32 - support block, 321 - limiting protrusion, 322 - backing plate, 323 - limiting groove, 4 - light-emitting diode, 5 - pin, 6 - circuit board, 7 - side ear, 8 - lead hole. Detailed Implementation Modes

[0017] The technical solution of the present utility model will be further described below, but the scope of protection claimed is not limited thereto.

[0018] As Figure 1 shown, an anti-interference optoelectronic switch includes a housing 1; the housing 1 includes a lower housing 11 and an upper housing 13. One end of the lower housing 11 and the upper housing 13 are respectively fixed at both ends of a column 12. Lower light-transmitting holes 14 and upper light-transmitting holes 18 with the same shape and size are respectively machined on the opposite surfaces of the lower housing 11 and the upper housing 13. A receiving diode 2 and a light-emitting diode 4 are respectively installed in the lower housing 11 and the upper housing 13. The receiving component of the receiving diode 2 and the light-emitting component of the light-emitting diode 4 are respectively placed at the ends of the lower light-transmitting hole 14 and the upper light-transmitting hole 18 away from the column 12. A circuit board 6 is further installed on the end face of the column 12 facing away from the upper housing 13 or the lower light-transmitting hole 14. The lead ends of the receiving diode 2 and the light-emitting diode 4 respectively pass through the end face of the circuit board 6 and are fixedly connected to the circuit board 6. An anti-interference component 3 is further provided in the lower housing 11 to shield one side of the receiving diode 2 relative to the column 12. The anti-interference component shields the side of the receiving diode, and only the front of the receiving diode is left to receive the optical signal of the light-emitting diode.

[0019] The circuit board is a customized PCB, on which basic resistor-capacitor-inductor components can be set, or other functional circuits can be customized according to the needs of customers.

[0020] Further, the anti-interference component 3 includes a light-shielding strip 31 and a support block 32. The support block 32 includes a limit protrusion 321 and a backing plate 322. The limit protrusion 321 is fixed at one end of the backing plate 322. A limit groove 323 is machined at the center of the top end of the backing plate 322. The light-shielding strip 31 is arranged in the limit groove 323. The receiving diode 2 is installed between the light-shielding strip 31 and the backing plate 322. By combining the support block 32 with the upper arm of the housing, the receiving diode is fixed in the lower housing to prevent it from moving.

[0021] Further, the light-shielding strip 31 is a semi-circular arc strip. The diameter of the light-shielding strip 31 is the same as the width of the limit groove 323. One end of the light-shielding strip 31 extends into the lower housing 11 and the end face of its end contacts the side of the receiving component on the receiving diode 2. For the semi-circular arc light-shielding strip, its upper part can extend into the light-transmitting hole 14, and the lower part is limited by the light-transmitting hole, so that the plane of its lower end face can exert a certain pressure on the receiving diode.

[0022] Further, lower cavities 15 and upper light-transmitting holes 18 that are opposite and parallel are respectively provided inside the lower housing 11 and the upper housing 13. The shape and size of the bottom of the upper light-transmitting hole 18 are the same as those of the light-emitting diode 4. A lower limiting groove 17 is further processed at the bottom of the lower cavity 15. The spatial structure formed by connecting the lower cavity 15 and the lower limiting groove 17 is the same in shape and size as the structure formed by the receiving diode 2 and the support block 32. By providing cavities with the same shape as the combination of the light-emitting diode or the receiving diode and the support block inside the housing, after the circuit board is fixed to the side of the housing, the light-emitting diode and the receiving diode can be fixed inside the housing, enabling the photoelectric switch to fix the diodes inside the housing without other limiting structures.

[0023] Further, a limiting circular groove 16 is also processed at the connection between the upright post 12 and the lower housing 11. The cross-sectional size of the limiting circular groove 16 is the same as that of the light-shielding strip 31.

[0024] Further, the receiving diode 2 and the light-emitting diode 4 are integrally of a flat plate structure. The light-emitting component and the receiving component are respectively perpendicular to the light-emitting diode 4 and the receiving diode 2. The leads of the receiving diode 2 and the light-emitting diode 4 are fixedly connected in parallel on one end face thereof.

[0025] Further, side ears 7 are respectively fixedly connected to both sides of one end of the lower housing 11 connected to the upright post 12. A circular through-hole is processed at the center of the side ear 7. The side ear serves as a structure for the overall installation and fixation of the photoelectric switch. When installing, bolts are used to pass through the circular through-hole thereof to fix it to the facility.

Claims

1. An anti-interference photoelectric switch, comprising a housing (1), characterized in that: The housing (1) includes a lower housing (11) and an upper housing (13). One end of the lower housing (11) and the upper housing (13) are respectively fixed at both ends of the column (12). On the opposite surfaces of the lower housing (11) and the upper housing (13), lower light-transmitting holes (14) and upper light-transmitting holes (18) with the same shape and size are respectively machined. A receiving diode (2) and a light-emitting diode (4) are respectively installed in the lower housing (11) and the upper housing (13). The receiving part of the receiving diode (2) and the light-emitting part of the light-emitting diode (4) are respectively placed at the ends of the lower light-transmitting hole (14) and the upper light-transmitting hole (18) far from the column (12). On the end face of the column (12) facing away from the upper housing (13) or the lower light-transmitting hole (14), a circuit board (6) is also installed. The lead ends of the receiving diode (2) and the light-emitting diode (4) respectively pass through the end face of the circuit board (6) and are fixedly connected to the circuit board (6). An anti-interference component (3) is also provided in the lower housing (11) to shield one side of the receiving diode (2) relative to the column (12).

2. The anti-interference photoelectric switch according to claim 1, characterized in that: The anti-interference component (3) includes a light-shielding strip (31) and a support block (32). The support block (32) includes a limit protrusion (321) and a backing plate (322). The limit protrusion (321) is fixed at one end of the backing plate (322). A limit groove (323) is machined at the center of the top end of the backing plate (322). The light-shielding strip (31) is arranged in the limit groove (323). The receiving diode (2) is installed between the light-shielding strip (31) and the backing plate (322).

3. The anti-interference photoelectric switch according to claim 2, characterized in that: The light-shielding strip (31) is in a semi-circular arc strip shape. The diameter of the light-shielding strip (31) is the same as the width of the limit groove (323). One end of the light-shielding strip (31) extends into the lower housing (11) and the end face of its end contacts the side face of the receiving part on the receiving diode (2).

4. The anti-interference photoelectric switch according to claim 1, characterized in that: In the lower housing (11) and the upper housing (13), a lower cavity (15) and an upper light-transmitting hole (18) that are opposite and parallel are respectively provided. The shape and size of the bottom of the upper light-transmitting hole (18) are the same as those of the light-emitting diode (4). A lower limit groove (17) is also machined at the bottom of the lower cavity (15). The spatial structure formed by the connection of the lower cavity (15) and the lower limit groove (17) is the same as the structure formed by the receiving diode (2) and the support block (32) in terms of shape and size.

5. The anti-interference photoelectric switch according to claim 1, characterized in that: A limit circular groove (16) is also machined at the connection between the column (12) and the lower housing (11). The cross-sectional size of the limit circular groove (16) is the same as that of the light-shielding strip (31).

6. The anti-interference photoelectric switch according to claim 1, characterized in that: The receiving diode (2) and the light-emitting diode (4) are of an overall flat structure. The light-emitting part and the receiving part are respectively perpendicular to the light-emitting diode (4) and the receiving diode (2). The leads of the receiving diode (2) and the light-emitting diode (4) are fixedly connected in parallel on one of their end faces.

7. The anti-interference photoelectric switch according to claim 1, characterized in that: On both side faces of one end of the lower housing (11) connected to the column (12), side ears (7) are respectively fixedly connected. A circular through-hole is machined at the center of the side ears (7).

Images