A waterproof structure for photoelectric sensors

Abstract

This utility model provides a waterproof structure for a photoelectric sensor, including a protective housing and a photoelectric sensor body. The protective housing has an installation cavity, within which the photoelectric sensor body is housed. A cover plate is also provided on one side of the protective housing, and the cover plate is integrally connected to the protective housing by screws. Assembly grooves are provided on both opposite inner surfaces of the installation cavity, and clamping blocks are inserted into each groove, with the side of the clamping blocks furthest from the assembly groove contacting the photoelectric sensor body. The photoelectric sensor body has terminals, and corresponding to the terminals, wiring sections are provided on two adjacent sides of the protective housing and cover plate, with the terminals inserted within these wiring sections. A sealing strip is embedded in the mounting groove on the edge of the cover plate, and when compressed, it adheres to the housing to prevent water seepage. The wiring section assembly section has a sealing isolation ring that wraps around the terminals of the photoelectric sensor body to form a seal, providing double protection against moisture intrusion and ensuring the sensor's usability.

Description

Technical Field

[0001] This utility model belongs to the field of waterproof structure technology, and more specifically, it relates to a waterproof structure for photoelectric sensors. Background Technology

[0002] Photoelectric sensors are detection devices based on the photoelectric effect. By emitting and receiving light, they can detect physical quantities such as the presence, position, shape, and distance of objects. They offer advantages such as non-contact detection, fast response, high accuracy, and strong anti-interference capabilities, leading to their widespread application in many fields. However, traditional photoelectric sensors suffer from poor waterproofing. In humid or water-filled environments, these sensors are prone to failure due to damage to core components, reduced detection accuracy, and shortened lifespan. This directly impacts the reliability of detection and limits their application in complex, humid environments. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a waterproof structure for photoelectric sensors, thereby solving the technical issues in the prior art where traditional photoelectric sensors have poor waterproof performance, and core components are easily damaged in humid or water-filled environments, leading to reduced detection accuracy, shortened service life, and reduced detection reliability.

[0004] The purpose and effectiveness of this waterproof structure for a photoelectric sensor are achieved through the following specific technical means:

[0005] A waterproof structure for a photoelectric sensor includes a protective housing and a photoelectric sensor body. The protective housing has an internal mounting cavity, and the photoelectric sensor body is housed within the mounting cavity. A cover plate is also provided on one side of the protective housing, and the cover plate is integrally connected to the protective housing by screws. Assembly grooves are provided on two opposite inner surfaces of the mounting cavity, and clamping blocks are inserted into each assembly groove. The side of the clamping block away from the assembly groove contacts the photoelectric sensor body. A terminal block is provided on the photoelectric sensor body, and a wiring portion is provided on two adjacent sides of the protective housing and the cover plate corresponding to the terminal block, with the terminal block inserted within the wiring portion.

[0006] The above technical solution further includes that a contact pad is provided on the side of the cover plate near the protective housing, and the contact pad is in contact with the photoelectric sensor body.

[0007] The above technical solution further includes that the shell cover plate on the periphery of the contact pad is also provided with an installation groove, and a sealing strip is replaceably provided in the installation groove, the sealing strip being in contact with the protective shell; both the sealing strip and the contact pad are made of rubber.

[0008] The above technical solution further includes that an indicator light is provided at the top of the photoelectric sensor body, and an observation slot is provided in the protective housing corresponding to the indicator light. A first isolation plate is also detachably provided in the observation slot through a sliding groove and a sliding rail.

[0009] The above technical solution further includes that a photoelectric receiving and transmitting end is provided on one side of the photoelectric sensor body, and a receiving and transmitting slot is provided through the protective shell corresponding to the photoelectric receiving and transmitting end, and a second isolation plate is installed in the receiving and transmitting slot; both the first isolation plate and the second isolation plate are made of transparent acrylic material.

[0010] The above technical solution further includes that a positioning sleeve and a positioning post are respectively provided between the bottom end of the clamping block and the assembly groove, and the positioning post passes through the positioning sleeve; a return spring is also provided inside the positioning sleeve, and the two ends of the return spring contact the positioning sleeve and the positioning post respectively.

[0011] The above technical solution further includes that the wiring part is also provided with an assembly part, the assembly part is provided with a sealing isolation ring, and the wiring terminal of the photoelectric sensor body passes through the sealing isolation ring.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The protective housing and the cover plate are connected by screws. A mounting groove is provided on the edge of the cover plate at the joint, into which a sealing strip is embedded. The strip, compressed by the screws, adheres tightly to the surface of the protective housing, preventing moisture from seeping in through the joint. The assembly section within the wiring unit is equipped with a sealing isolation ring. The wiring terminals of the photoelectric sensor body pass through this ring, and the inner wall of the isolation ring is in close contact with the outer circumference of the wiring terminals, forming a seal at the wiring point. This prevents moisture from entering the protective housing and avoids corrosion, short circuits, or optical path contamination of core components due to moisture.

[0014] 2. The protective housing mounting cavity has assembly grooves on two opposite inner sides, through which clamping blocks are inserted, with one side directly contacting the photoelectric sensor body. A positioning post is fixed to the bottom of the clamping block, and the positioning post inserts into a positioning sleeve at the bottom of the assembly groove. A return spring is fitted inside the positioning sleeve, with its two ends abutting against the bottom of the positioning sleeve and the bottom of the positioning post, respectively. When installing the sensor body, the clamping block is squeezed and moves into the assembly groove, compressing the positioning post and the return spring; the spring's reverse elastic force pushes the positioning post, ensuring that the clamping block continuously clamps the sensor body, guaranteeing its stability within the protective housing and preventing shaking that could affect its use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the assembled structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the first exploded structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the second explosive structure of this utility model.

[0018] Figure 4 yes Figure 3 A schematic diagram of the structure of region a in the middle.

[0019] Figure 5 This is a schematic diagram of the structure of the shell cover plate of this utility model.

[0020] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0021] 1. Protective housing; 2. Photoelectric sensor body; 3. Housing cover plate; 101. Mounting cavity; 102. Assembly slot; 103. Clamping block; 104. Wiring part; 201. Contact pad; 301. Mounting slot; 302. Sealing strip; 401. Observation slot; 402. First isolation plate; 501. Transmitter / receiver slot; 502. Second isolation plate; 601. Positioning sleeve; 602. Positioning post; 603. Return spring; 701. Sealing isolation ring. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model.

[0023] Example:

[0024] like Figures 1 to 5 As shown, this utility model provides a waterproof structure for a photoelectric sensor, including a protective housing 1 and a photoelectric sensor body 2. The protective housing 1 has a mounting cavity 101, and the photoelectric sensor body 2 is inserted into the mounting cavity 101. A cover plate 3 is also provided on one side of the protective housing 1, and the cover plate 3 is connected to the protective housing 1 by screws. Assembly grooves 102 are provided on two opposite inner surfaces of the mounting cavity 101, and clamping blocks 103 are inserted into each assembly groove 102. The side of the clamping block 103 away from the assembly groove 102 contacts the photoelectric sensor body 2. A wiring terminal is provided on the photoelectric sensor body 2. A wiring portion 104 is provided on two adjacent sides of the protective housing 1 and the cover plate 3 corresponding to the wiring terminal, and the wiring terminal is inserted into the wiring portion 104. The protective housing 1 and the cover plate 3 are fixedly connected by screws, forming a closed structure around the mounting cavity 101. The screw connection provides mechanical fastening force, making the protective housing 1 fit tightly with the cover plate 3, preventing external moisture from entering the mounting cavity 101 through the housing gaps, creating a relatively independent protective space for the photoelectric sensor body 2, and reducing the risk of moisture intrusion affecting the core components.

[0025] Clamping blocks 103 are inserted into the assembly grooves 102 on the two opposite inner sides of the mounting cavity 101, with one side of the clamping block 103 contacting the photoelectric sensor body 2. When the photoelectric sensor body 2 is installed into the mounting cavity 101, the clamping blocks 103 on both sides exert opposing clamping forces on it, fixing the photoelectric sensor body 2 in the center position of the mounting cavity 101. This structure restricts the degree of freedom of movement of the photoelectric sensor body 2 within the mounting cavity 101, preventing displacement of the photoelectric sensor body 2 due to vibration or collision during equipment operation, ensuring that the light emitting and receiving components maintain the correct working position, and maintaining detection accuracy.

[0026] The protective housing 1 and the cover plate 3 are respectively provided with wiring portions 104 corresponding to the wiring terminals of the photoelectric sensor body 2, and the wiring terminals are inserted into the wiring portions 104. This centralizes the sensor wiring harness, reduces the exposed wiring area, and narrows the path range for moisture to contact the wiring terminals. At the same time, it facilitates waterproofing treatment of the wiring terminals inside the wiring portions 104, such as setting a sealing structure, to prevent moisture from seeping into the internal circuit through the wiring terminals, avoiding circuit failures such as short circuits and open circuits caused by water ingress into the wiring terminals, and ensuring the stable operation of the electrical system of the photoelectric sensor body 2.

[0027] like Figure 2 and Figure 5 As shown, a contact pad 201 is also provided on the side of the cover plate 3 near the protective housing 1, and the contact pad 201 contacts the photoelectric sensor body 2; a mounting groove 301 is also provided on the cover plate 3 around the contact pad 201, and a sealing strip 302 is replaceably provided in the mounting groove 301, and the sealing strip 302 contacts the protective housing 1; both the sealing strip 302 and the contact pad 201 are made of rubber. The contact pad 201 is located on the side of the cover plate 3 near the protective housing 1 and is in direct contact with the surface of the photoelectric sensor body 2. When the cover plate 3 is connected to the protective housing 1 by screws, the contact pad 201 is compressed and deformed, forming pressure perpendicular to the surface of the photoelectric sensor body 2, fixing it in the mounting cavity 101 of the protective housing 1. With the clamping block 103 clamping from the side, the photoelectric sensor body 2 is fixed in multiple directions, ensuring its stable position in the protective housing 1.

[0028] The sealing strip 302 is installed in the mounting groove 301 of the cover plate 3. When the cover plate 3 and the protective housing 1 are fastened with screws, the sealing strip 302 is compressed and deformed, filling the gap between the cover plate 3 and the protective housing 1. The rubber sealing strip 302 is elastic and fits tightly against the surface of the protective housing 1, forming a waterproof barrier around the contact pad 201 and the entire edge of the cover plate 3. This prevents external moisture from seeping into the mounting cavity 101 from the joint between the cover plate 3 and the protective housing 1, protecting the internal photoelectric sensor body 2 from moisture corrosion. At the same time, the sealing strip 302 is replaceable in the mounting groove 301. If aging or wear occurs after long-term use, resulting in a decrease in sealing performance, the old strip can be directly removed from the mounting groove 301 and a new sealing strip 302 can be installed without replacing the entire cover plate 3 or the protective housing 1, reducing maintenance costs and quickly restoring the waterproof structure's sealing performance, ensuring the continuous effectiveness of the waterproofing.

[0029] like Figures 1 to 3 As shown, an indicator light is located at the top of the photoelectric sensor body 2. The protective housing 1 has an observation slot 401 corresponding to the indicator light. A first isolation plate 402 is detachably mounted within the observation slot 401 via a sliding groove and rail. A photoelectric receiving / transmitting end is also located on one side of the photoelectric sensor body 2. A receiving / transmitting slot 501 is also provided through the protective housing 1 corresponding to the receiving / transmitting end. A second isolation plate 502 is held within the receiving / transmitting slot 501. Both the first and second isolation plates 402 are made of transparent acrylic. The observation slot 401 on the protective housing 1 faces the indicator light at the top of the photoelectric sensor body 2. The first isolation plate 402 is installed within the observation slot 401 via a sliding groove and rail. The transparent acrylic first isolation plate 402 ensures that the indicator light penetrates the observation slot 401, facilitating observation of the working status. Simultaneously, it prevents moisture from entering the protective housing 1, avoiding damage to the indicator light due to moisture contact. The detachable design makes the first isolation plate 402 easy to install and remove, facilitating cleaning, maintenance, or replacement of damaged parts.

[0030] The protective housing 1 has a receiving and transmitting slot 501 corresponding to the photoelectric receiving and transmitting end of the photoelectric sensor body 2, and a second isolation plate 502 is installed inside the receiving and transmitting slot 501. The second isolation plate 502, made of transparent acrylic material, ensures that light can pass smoothly through the receiving and transmitting slot 501 without affecting the operation of the photoelectric receiving and transmitting end; at the same time, it forms a physical barrier to prevent moisture from entering the protective housing 1, thus avoiding performance degradation or damage to the photoelectric receiving and transmitting end due to moisture.

[0031] like Figures 3 to 4As shown, a positioning sleeve 601 and a positioning post 602 are respectively provided between the bottom end of the clamping block 103 and the assembly groove 102. The positioning post 602 passes through the positioning sleeve 601. A return spring 603 also passes through the positioning sleeve 601, and the two ends of the return spring 603 contact the positioning sleeve 601 and the positioning post 602 respectively. The positioning post 602 passes through the positioning sleeve 601, providing a guiding path for the movement of the clamping block 103 in the assembly groove 102, restricting the movement direction of the clamping block 103, so that it can only slide along the axial direction of the engagement between the positioning post 602 and the positioning sleeve 601, avoiding the clamping block 103 from shifting or tilting, and ensuring that the clamping block 103 always acts perpendicularly on the photoelectric sensor body 2; the return spring 603 is located inside the positioning sleeve 601, and its two ends abut against the positioning sleeve 601 and the positioning post 602 respectively. When the photoelectric sensor body 2 is installed into the mounting cavity 101 and the clamping block 103 is pressed, the clamping block 103 drives the positioning column 602 to compress the reset spring 603. The reset spring 603 generates a reverse elastic force to push the positioning column 602, so that the clamping block 103 continuously applies a stable clamping force to the photoelectric sensor body 2, thereby ensuring the stability of the sensor during detection.

[0032] like Figure 3 and Figure 5 As shown, an assembly section is also provided inside the wiring section 104, and a sealing isolation ring 701 is provided inside the assembly section. The wiring terminals of the photoelectric sensor body 2 pass through the sealing isolation ring 701. The inner wall of the sealing isolation ring 701 is tightly fitted to the wiring terminals, preventing moisture from entering the protective housing 1 through the gap between the wiring terminals and the wiring section 104. This prevents short circuits, open circuits, and other circuit faults caused by contact with moisture, protecting the electrical system safety of the photoelectric sensor body 2. At the same time, the sealing isolation ring 701 constrains the wiring terminals passing through it, restricting their movement within the wiring section 104 and preventing loosening or displacement of the wiring terminals due to equipment vibration or pulling. This ensures a secure connection of the wiring terminals, maintains circuit connection stability, and guarantees normal signal transmission of the photoelectric sensor body 2.

[0033] The above description is merely an embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A waterproof structure for a photosensor, comprising a protective case (1) and a photosensor main body (2), characterized in that: The protective housing (1) has an installation cavity (101) inside, and the photoelectric sensor body (2) passes through the installation cavity (101). A cover plate (3) is also provided on one side of the protective housing (1), and the cover plate (3) is connected to the protective housing (1) by screws. Assembly grooves (102) are also provided on the two opposite inner sides of the installation cavity (101), and clamping blocks (103) are provided in the assembly grooves (102). The side of the clamping block (103) away from the assembly groove (102) is in contact with the photoelectric sensor body (2). A terminal is provided on the photoelectric sensor body (2), and a wiring part (104) is provided on the two adjacent sides of the protective housing (1) and the cover plate (3) corresponding to the terminal. The terminal passes through the wiring part (104).

2. The waterproof structure for a photosensor according to claim 1, wherein: The cover plate (3) is provided with a contact pad (201) on the side near the protective housing (1), and the contact pad (201) is in contact with the photoelectric sensor body (2).

3. The waterproof structure for a photosensor according to claim 2, wherein: An installation groove (301) is provided on the shell cover plate (3) around the contact pad (201). A sealing strip (302) is replaceably provided in the installation groove (301). The sealing strip (302) is in contact with the protective shell (1). Both the sealing strip (302) and the contact pad (201) are made of rubber.

4. The waterproof structure for a photosensor according to claim 1, wherein: An indicator light is provided at the top of the photoelectric sensor body (2), and an observation slot (401) is provided on the protective housing (1) corresponding to the indicator light. A first isolation plate (402) is detachably provided in the observation slot (401) through a sliding groove and a sliding rail.

5. A waterproof structure for a photoelectric sensor according to claim 4, characterized in that: The photoelectric sensor body (2) is also provided with a photoelectric receiving and transmitting end on one side. The protective shell (1) is also provided with a receiving and transmitting slot (501) through the photoelectric receiving and transmitting end. A second isolation plate (502) is installed in the receiving and transmitting slot (501). Both the first isolation plate (402) and the second isolation plate (502) are made of transparent acrylic material.

6. The waterproof structure for a photoelectric sensor according to claim 1, characterized in that: A positioning sleeve (601) and a positioning post (602) are respectively provided between the bottom end of the clamping block (103) and the assembly groove (102). The positioning post (602) passes through the positioning sleeve (601). A return spring (603) also passes through the positioning sleeve (601). The two ends of the return spring (603) are in contact with the positioning sleeve (601) and the positioning post (602) respectively.

7. A waterproof structure for a photoelectric sensor according to claim 1, characterized in that: The wiring section (104) is also provided with an assembly section, and the assembly section is provided with a sealing isolation ring (701). The wiring terminal of the photoelectric sensor body (2) passes through the sealing isolation ring (701).

Images