U-shaped waterproof photoelectric induction switch

Abstract

The utility model discloses a U-shaped waterproof photoelectric induction switch. The U-shaped waterproof photoelectric induction switch comprises a bottom shell U-shaped cavity, an upper cover plate, a PCB, a light guide column, a light shield and a rubber sleeve. The PCB is fixed in the U-shaped cavity of the bottom shell, and the emitter and the receiver are located at the two ends of the U-shaped cavity of the bottom shell in the vertical direction. A light guide through hole matched with the light guide column in shape is formed in the side wall of the U-shaped cavity of the bottom shell, and the light shield is fixed between the emitter / receiver and the light guide through hole. A groove is formed in the contour line of the outer side of the light guide through hole, a welding rib is arranged at the bottom of the groove, and the light guide column is installed in the light guide through hole and then welded and fixed to the U-shaped cavity of the bottom shell. The shape of the upper cover plate is matched with the shape of an opening in the upper end of the U-shaped cavity of the bottom shell, a wiring through hole is formed in the surface of the upper cover plate, the rubber sleeve is fixed in the wiring through hole, and an electric wire of the PCB penetrates through the rubber sleeve. A groove along the contour line is formed in the upper end of the bottom shell U-shaped cavity, a welding rib is arranged at the corresponding position of the upper cover plate, and the bottom shell U-shaped cavity and the upper cover plate are welded and fixed.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical structure design technology, and relates to the improvement of elevator safety accessories, specifically a U-shaped waterproof photoelectric sensor switch. Background Technology

[0002] The working principle of a photoelectric sensor switch is based on the photoelectric effect or infrared technology. It uses a beam of light between a transmitter and a receiver to detect objects. Specifically, the transmitter emits a beam of light; when this beam is blocked or reflected by an object, the receiver receives this change and converts it into an electrical signal, thereby triggering the switch. Based on this principle, photoelectric sensor switches can be used to detect the status of elevator doors and the entry and exit of passengers, thereby controlling the opening and closing of elevator doors and ensuring passenger safety.

[0003] In elevator safety management, photoelectric sensor switches are typically installed on both sides of the elevator car door, with transmitters and receivers arranged at equal intervals. When no object enters, the light beam can pass through smoothly, the receiver receives the light signal and outputs a low level; when an object enters the path of the light beam, the beam is blocked, the receiver cannot receive the light signal, and thus outputs a high level, triggering the elevator door to reopen or activating the safety protection mechanism.

[0004] The advantages of photoelectric sensor switches include high sensitivity, fast response, and long lifespan. They are also less susceptible to electromagnetic interference, enabling them to improve elevator safety at a low cost. However, in rainy weather or during building renovations, moisture may be present at the elevator car door location, and the installation location of the photoelectric sensor switch is easily affected by moisture, potentially leading to malfunction. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model proposes a U-shaped waterproof photoelectric sensor switch. Through the groove structure on the outline of the bottom shell and the welding ribs on the surface of the top cover plate, the two can form a sealed internal cavity after welding and fixing, protecting the internal circuit structure and enabling the sensor switch to work normally in watery and harsh environments.

[0006] A U-shaped waterproof photoelectric sensor switch includes a U-shaped cavity in the bottom shell, a top cover plate, a PCB circuit board, a light guide column, a light shield, and a rubber sleeve.

[0007] The PCB circuit board is fixed inside the U-shaped cavity of the bottom shell, and the transmitter and receiver are located at both ends of the U-shaped cavity in the vertical direction. A light shield is fixed inside the U-shaped cavity of the bottom shell, located between the transmitter, receiver, and sidewall. Light guide holes are provided at both ends of the U-shaped cavity in the vertical direction to connect the optical path between the transmitter and receiver. The shape of the light guide holes matches that of the light guide post.

[0008] The diameter of the light guide hole near the U-shaped cavity of the bottom shell is smaller than that on the outside. A groove is provided on the outer contour line, and a welding rib is provided at the bottom of the groove. After the light guide post is inserted into the light guide hole, it is welded and fixed to the U-shaped cavity of the bottom shell.

[0009] The upper cover plate is U-shaped, matching the shape of the upper opening of the U-shaped cavity of the bottom shell. A wiring through hole is provided in the horizontal direction of the U-shape of the upper cover plate, and the rubber sleeve is fixed in the wiring through hole. The wires of the PCB circuit board pass through the rubber sleeve and connect to the external circuit.

[0010] The upper opening of the U-shaped cavity of the bottom shell is provided with a groove along the contour line. The side of the upper cover plate facing the U-shaped cavity of the bottom shell is provided with a welding rib along the contour line. The U-shaped cavity of the bottom shell is welded and fixed to the upper cover plate.

[0011] Preferably, the rubber sleeve is fixed to the top cover plate and the wire with waterproof adhesive.

[0012] Preferably, two nut cavities are provided at both ends of the U-shaped cavity of the bottom shell in the horizontal direction. The height of the nut cavities is the same as the height of the U-shaped cavity of the bottom shell, and the upper opening is provided with a groove along the contour line. The side of the upper cover plate facing the U-shaped cavity of the bottom shell is provided with a welded rib along the contour line of the nut cavity. A nut is fixed in the nut cavity, and a nut through hole is opened on the side of the nut cavity facing the U-shaped cavity of the bottom shell. The diameter of the nut through hole is larger than the thread diameter of the nut in the nut cavity and smaller than the outer diameter of the nut.

[0013] Preferably, fixed channels penetrating the U-shaped cavity of the bottom shell are provided at both ends in the horizontal direction. These fixed channels are not connected to the interior of the U-shaped cavity.

[0014] Preferably, the upper cover plate has an indicator through-hole with the same shape as the light guide through-hole. The position of the indicator through-hole is opposite to the position of the indicator light on the PCB circuit board. A groove is provided on the outline of the indicator through-hole on the side away from the U-shaped cavity of the bottom shell, and a welding rib is provided at the bottom of the groove. After the light guide post is inserted into the indicator through-hole, it is welded and fixed to the upper cover plate.

[0015] Preferably, the PCB circuit board has multiple through holes, and the bottom shell U-shaped cavity has multiple pillars. The through holes and pillars are positioned to match each other, and the pillars are passed through the through holes to fix the PCB circuit board inside the bottom shell U-shaped cavity.

[0016] This utility model has the following beneficial effects:

[0017] 1. This device sets waterproof grooves and welding ribs on the surfaces of the contacting components. During the assembly process, the welding ribs melt and enter the grooves in liquid form. After cooling, the liquid fills the space of the grooves, thus forming a relatively sealed structure inside the PCB circuit board of the photoelectric sensor switch, which has a waterproof function.

[0018] 2. This device can cope with adverse factors caused by rainy weather or building renovations, ensuring the safe and stable operation of the elevator. Furthermore, it is visually indistinguishable from common photoelectric sensor switches, allowing for direct replacement without increasing elevator maintenance costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a U-shaped waterproof photoelectric sensor switch.

[0020] Figure 2 This is a schematic diagram showing the relative positions of the transmitter and receiver;

[0021] Figure 3 This is a schematic diagram of a light guide hole structure;

[0022] Figure 4 This is a schematic diagram of the upper cover plate structure;

[0023] Figure 5 This is a schematic diagram of the fixed channel and the inner cavity of the nut;

[0024] Figure 6 A schematic diagram showing how a photoelectric sensor switch is fixed through a nut through-hole;

[0025] Figure 7 This is a schematic diagram of the assembled U-shaped waterproof photoelectric sensor switch.

[0026] The components include: 1. U-shaped cavity of the bottom shell; 2. Top cover plate; 3. PCB circuit board; 4. Transmitter; 5. Receiver; 6. Light guide hole; 7. Light guide post; 8. Rubber sleeve; 9. Wiring through hole; 10. Wire; 11. Fixing channel; 12. Nut cavity; 13. Nut through hole; 14. Indicator through hole; Detailed Implementation

[0027] The present invention will be further explained below with reference to the accompanying drawings;

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] like Figure 1 As shown, a U-shaped waterproof photoelectric sensor switch includes a bottom shell U-shaped cavity 1, an upper cover plate 2, a PCB circuit board 3, a light guide column 7, a light shield, and a rubber sleeve 8.

[0031] The PCB circuit board 3 has multiple through holes, and multiple pillars are arranged inside the U-shaped cavity 1 of the bottom shell. The through holes and pillars are positioned to match each other, and the pillars pass through the through holes on the PCB circuit board 3, thus fixing the PCB circuit board 3 inside the U-shaped cavity 1 of the bottom shell. The transmitter 4 and receiver 5 on the PCB circuit board 3 are located at both ends of the bottom U-shaped cavity 1 in the vertical direction. A light shield is fixed inside the bottom U-shaped cavity 1, located between the transmitter 4, receiver 5 and the side wall. Light guide holes 6 are opened at both ends of the bottom U-shaped cavity 1 in the vertical direction to connect the optical path between the transmitter 4 and the receiver 5, such as... Figure 2 As shown.

[0032] The light guide hole 6 and the light guide post 7 are shaped to match, meaning the diameter of the light guide hole 6 near the inside of the U-shaped cavity 1 of the bottom shell is smaller than that on the outside. A groove is provided on the outer contour line, and a welding rib is provided at the bottom of the groove. After the light guide post 7 is inserted into the light guide hole 6, it is welded and fixed to the U-shaped cavity 1 of the bottom shell. Figure 3 As shown.

[0033] The upper cover plate 2 is U-shaped, matching the shape of the opening at the upper end of the U-shaped cavity 1 of the bottom shell. A wiring through-hole 9 is provided in the horizontal direction of the U-shape of the upper cover plate 2. The rubber sleeve 8 is fixed inside the wiring through-hole 9, and the wires 10 of the PCB circuit board 3 pass through the rubber sleeve 8 to connect to the external circuitry, such as... Figure 4 As shown. The rubber sleeve 8 is fixed to the upper cover plate 2 and the wire 10 with waterproof glue.

[0034] At both ends of the U-shaped cavity 1 in the horizontal direction, there are fixed channels 11 penetrating the U-shaped cavity 1, and the fixed channels 11 are not connected to the interior of the U-shaped cavity 1. After assembly, the U-shaped waterproof photoelectric sensor switch can be fixed along the direction from the upper cover plate 2 to the bottom of the U-shaped cavity 1 through the fixed channels 11, such as... Figure 5 As shown.

[0035] Inside the U-shaped cavity 1 of the base shell, near the fixed channel 11, two nut cavities 12 are also provided. The height of the nut cavity 12 is the same as the height of the U-shaped cavity 1 of the base shell, and the upper opening is provided with a groove. A nut is fixed in the nut cavity 12, and a nut through hole 13 is opened on the side of the nut cavity 12 facing the horizontal direction of the U-shaped cavity 1 of the base shell. The diameter of the nut through hole 13 is larger than the thread diameter of the nut in the nut cavity 12, but smaller than the outer diameter of the nut. After assembly, a screw can be used to pass through the nut through hole 13 and match the nut in the nut cavity 12 to fix the U-shaped waterproof photoelectric sensor switch. Figure 6 As shown.

[0036] The upper cover plate 2 has an indicator through hole 14 with the same shape as the light guide hole 6, and the position of the indicator through hole 14 is opposite to the position of the indicator light in the PCB circuit board 3. After the light guide post 7 is inserted into the indicator through hole 14, it is welded and fixed to the upper cover plate 2.

[0037] The upper opening of the bottom shell U-shaped cavity 1 is provided with a groove along the contour line. The side of the upper cover plate 2 facing the bottom shell U-shaped cavity 1 is provided with a welding rib along the outer contour line of the bottom shell U-shaped cavity 1 and the inner cavity 12 of the nut. The bottom shell U-shaped cavity 1 is welded and fixed to the upper cover plate 2.

[0038] During the welding and fixing process, the welding ribs set on the light guide hole 6, the indicator hole 14, and the upper cover plate 2 melt due to the temperature, flow into the groove, and fill the groove after cooling, so that the U-shaped cavity 1 of the bottom shell forms a sealed cavity, thereby achieving the purpose of waterproofing. Figure 7 As shown.

Claims

1. A U-shaped waterproof photoelectric sensor switch, comprising a bottom U-shaped cavity (1), an upper cover plate (2), a PCB circuit board (3), a light guide post (7), and a light shield, wherein the PCB circuit board (3) is fixed inside the bottom U-shaped cavity (1), and a transmitter (4) and a receiver (5) are disposed at both ends of the bottom U-shaped cavity (1) in the vertical direction; the light shield is fixed inside the bottom U-shaped cavity (1) and located between the transmitter (4), the receiver (5), and the side wall; light guide holes (6) are provided at both ends of the bottom U-shaped cavity (1) in the vertical direction for connecting the light path between the transmitter (4) and the receiver (5); the shape of the light guide hole (6) matches that of the light guide post (7); characterized in that: The U-shaped waterproof photoelectric sensor switch also includes a rubber sleeve (8); The diameter of the light guide hole (6) inside the U-shaped cavity (1) of the bottom shell is smaller than that of the outside. A groove is provided on the outline of the outside, and a welding rib is provided at the bottom of the groove. After the light guide post (7) is inserted into the light guide hole (6), it is welded and fixed to the U-shaped cavity (1) of the bottom shell. The upper cover plate (2) is U-shaped and matches the shape of the upper opening of the U-shaped cavity (1) of the bottom shell; a wiring through hole (9) is opened in the horizontal direction of the U-shape of the upper cover plate (2), and the rubber sleeve (8) is fixed in the wiring through hole (9). The wires (10) of the PCB circuit board (3) pass through the rubber sleeve (8) and are connected to the external circuit. The upper opening of the bottom shell U-shaped cavity (1) is provided with a groove along the contour line; the side of the upper cover plate (2) facing the bottom shell U-shaped cavity (1) is provided with a welding rib along the contour line; the bottom shell U-shaped cavity (1) and the upper cover plate (2) are welded and fixed.

2. The U-shaped waterproof photoelectric sensor switch as described in claim 1, characterized in that: The rubber sleeve (8) is fixed to the upper cover plate (2) and the rubber sleeve (8) is fixed to the wire (10) with waterproof glue.

3. The U-shaped waterproof photoelectric sensor switch as described in claim 1, characterized in that: At both ends of the bottom shell U-shaped cavity (1) in the horizontal direction, there are fixed channels (11) that penetrate the bottom shell U-shaped cavity (1); the fixed channels (11) are not connected to the inside of the bottom shell U-shaped cavity (1).

4. The U-shaped waterproof photoelectric sensor switch as described in claim 1, characterized in that: At both ends of the bottom shell U-shaped cavity (1) in the horizontal direction, there are two nut cavities (12). The height of the nut cavity (12) is the same as the height of the bottom shell U-shaped cavity (1). The upper opening is provided with a groove along the contour line. The side of the upper cover plate (2) facing the bottom shell U-shaped cavity (1) is provided with a welding rib along the contour line of the nut cavity (12). A nut is fixed in the nut cavity (12). A nut through hole (13) is opened on the side of the nut cavity (12) facing the bottom shell U-shaped cavity (1) in the horizontal direction. The diameter of the nut through hole (13) is larger than the thread diameter of the nut in the nut cavity (12) and smaller than the outer diameter of the nut.

5. The U-shaped waterproof photoelectric sensor switch as described in claim 4, characterized in that: At both ends of the bottom shell U-shaped cavity (1) in the horizontal direction, there are fixed channels (11) that penetrate the bottom shell U-shaped cavity (1); the nut inner cavity (12) is located in the bottom shell U-shaped cavity (1) near the fixed channel (11).

6. The U-shaped waterproof photoelectric sensor switch as described in claim 1, characterized in that: The upper cover plate (2) has an indicator through hole (14) with the same shape as the light guide hole (6); the position of the indicator through hole (14) is opposite to the position of the indicator light in the PCB circuit board (3).

7. The U-shaped waterproof photoelectric sensor switch as described in claim 6, characterized in that: The indicator through hole (14) has a groove on the contour line on the side away from the bottom shell U-shaped cavity (1). A welding rib is provided at the bottom of the groove. After the light guide column (7) is inserted into the indicator through hole (14), it is welded and fixed to the upper cover plate (2).

8. The U-shaped waterproof photoelectric sensor switch as described in claim 1, characterized in that: The PCB circuit board (3) is provided with multiple through holes, and the bottom shell U-shaped cavity (1) is provided with multiple pillars; the positions of the through holes and the pillars are matched.

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