Groove type sensor structure

Abstract

The utility model discloses a groove type sensor structure which comprises a body and a light receiving body inserted at the upper end of the body, the whole light receiving body is U-shaped and is of a transparent structure, protruding light-transmitting strips are symmetrically arranged on the opposite faces of the U-shaped light receiving body, and a circuit board fixing cavity matched with a circuit board is formed in the body and the light receiving body. A lead hole communicated with the circuit board fixing cavity is formed in the bottom of the body, the upper portion of the body and the periphery of the light receiving body are integrally coated with a shell, and a light transmitting window is formed in the position, corresponding to the shell, of the light transmitting strip. The groove type sensor structure has the characteristics of high protection grade and good structural stability, and can meet the application requirements of complex environments.

Description

Technical Field

[0001] The present application relates to the technical field of photoelectric sensors, and in particular to a slot-type sensor structure with good structural stability. Background Art

[0002] Slot-type photoelectric sensors have been widely used in the field of positioning detection such as production automation due to their high detection accuracy. However, slot-type photoelectric sensors in the prior art are mostly assembled by direct snap-on assembly, which provides a low level of protection. There are gaps at the joints of the shell, and dust and water vapor from the outside can easily enter the shell through the gaps, which will affect the circuit inside the photoelectric sensor and reduce the sensitivity or accuracy of the product. In addition, in order to facilitate installation, a certain amount of space is left at the installation of the transmitting and receiving devices. In a vibrating environment, the stability of the product structure is poor, which can easily cause the position of the transmitting and receiving devices to shift, causing deviations in product positioning, and therefore cannot meet the use requirements in complex environments. The Chinese patent document with a publication date of August 5, 2022 and a publication number of CN 217132207 U discloses a wide slot photoelectric sensor with good stability, including a wide slot photoelectric sensor body and a wire on the left side of the wide slot photoelectric sensor body, and a bending positioning adjustment mechanism is arranged on the outside of the wire; the bending positioning adjustment mechanism includes two circular sleeves movably arranged on the wire, and a fixed sleeve on the circular sleeve on the right side is provided with a connecting sleeve with an opening on the right side, and the right side of the connecting sleeve is bonded and fixed to the left side of the wide slot photoelectric sensor body, and the same telescopic rubber sleeve is bonded and fixed between the two circular sleeves, and a fixed seat is fixedly connected to the top of the circular sleeve on the right side. The slot-type photoelectric sensor can support and protect the connection between the wire and the slot-type sensor body, reduce the risk of bending and breaking at the connection between the wire and the slot-type sensor body, and facilitate the bending and positioning of the wire according to the wiring requirements. However, the slot-type photoelectric sensor body adopts a direct snap-on assembly method, so the problem of poor stability of the product structure has not been solved. Utility Model Content

[0003] The purpose of the utility model is to solve the problems of low protection level and poor structural stability of the slot-type photoelectric sensor in the prior art, and to provide a slot-type sensor structure with the characteristics of high protection level and good structural stability, which can meet the application requirements in complex environments.

[0004] The technical solution adopted by the utility model to solve the above technical problems is a slot-type sensor structure, including a circuit board, the slot-type sensor including a body and a photoreceptor plugged into the upper end of the body, the photoreceptor is U-shaped as a whole and is a transparent structure, and the opposite surfaces of the U-shaped photoreceptor are symmetrically provided with raised light-transmitting strips, a circuit board fixing cavity adapted to the circuit board is formed in the body and the photoreceptor, a lead hole connected to the circuit board fixing cavity is provided at the bottom of the body, the upper part of the body and the outer circumference of the photoreceptor are integrally covered with a shell, and the light-transmitting strip forms a light-transmitting window at the corresponding position of the shell. The utility model forms a circuit board fixing cavity adapted to the circuit board (PCBA) in the body and the photoreceptor, which can completely fix the circuit board in the cavity without movement, and has good structural stability. On the other hand, the upper part of the body and the periphery of the light receiving body adopt an integrally coated (plastic-coated) shell structure. Compared with the snap-on assembly method of the prior art, there is no gap at the joint of the shell, and dust and water vapor from the outside cannot enter the shell, which will not affect the circuit inside the photoelectric sensor, thereby improving the protection level and ensuring the sensitivity or accuracy of the product. Therefore, the slot sensor of the utility model has the characteristics of high protection level and good structural stability, and can meet the application requirements of complex environments.

[0005] Preferably, the cross section of the body is rectangular, and the body is provided with a two-step structure with a small upper part and a large lower part. The lower part of the photoreceptor is provided with an insertion cavity adapted to the upper step of the body, and the shell is covered on the lower step of the body and the periphery of the photoreceptor. One of the two-step structures on the body is used for positioning with the photoreceptor, and the other is used for plastic coating of the shell.

[0006] Preferably, a positioning pit is provided at the lower part of the upper step, and a positioning protrusion matching the positioning pit is provided on the inner wall of the insertion cavity, and the positioning pit is arranged on the wide side of the body. The positioning pit and the positioning protrusion cooperate to fix the relative position of the body and the light receiving body, ensuring that the shell does not shift when the plastic is coated.

[0007] Preferably, the lead hole is located at the center of the bottom of the body, the hole wall of the lead hole extends up and down to form a wire outlet barrel, a vertical groove is provided on the barrel wall of the wire outlet barrel, a sheath is provided on the wire outlet barrel, and the inner diameter of the sheath is a truncated cone structure with a small upper and large lower diameter. The sheath with a small upper and large lower inner diameter is used to cooperate with the lead wire to play a sealing role to prevent external dust, water vapor, etc. from entering the interior of the sensor.

[0008] Preferably, both sides of the lead hole at the bottom of the body are provided with downwardly opening holes, and the holes are rectangular holes, which are used for positioning the body when assembling the sensor.

[0009] Preferably, the cross section of the circuit board fixing cavity on the main body is in a convex shape, the board body of the circuit board is adapted to the wide side of the convex-shaped circuit board fixing cavity, and a lead avoidance groove is further provided on the cavity wall of the circuit board fixing cavity, and the lead avoidance groove is arranged in the center of the wide side of the circuit board fixing cavity. The wide side of the circuit board fixing cavity with a convex cross section is used to insert the board body of the circuit board and fix it so that it does not move; the narrow side of the circuit board fixing cavity is used to accommodate components on the circuit board. The lead avoidance groove facilitates the assembly operation of the lead.

[0010] Preferably, the circuit board fixing cavity in the photoreceptor has both sides in the width direction extending upward to the upper end of the photoreceptor, and an arc groove parallel to the light guide bar is provided on the inner wall of the circuit board fixing cavity close to the light guide bar. The circuit board fixing cavities on both sides of the upper part of the photoreceptor are used to install the light emitting device and the light receiving device respectively.

[0011] Preferably, bosses are provided on both sides of the photoreceptor in the thickness direction, the bosses are in a concave shape as a whole and the bottom side is parallel to the bottom side of the photoreceptor, and when the shell covers the photoreceptor, the top surface of the bosses is flush with the surface of the shell. The bosses can play a role in fixing the shell, and after the photoreceptor covers the shell, the shell is prevented from moving relative to the photoreceptor after being subjected to force.

[0012] Preferably, both sides of the housing of the sensor are provided with fixing blocks, the fixing blocks are arranged on the front and rear sides of one side of the housing in the width direction, and the fixing blocks are provided with fixing holes. The fixing blocks and the fixing holes are used to fix the sensor.

[0013] The beneficial effects of the utility model are: 1. The circuit board is fixed in three directions of x-axis, y-axis and z-axis, the cable connection is reliable, and the circuit is firmly fixed; 2. Since the lead wire sheath adopts a gradually tightening interference design, the protection level of the lead wire is improved; using a secondary plastic coating process, the outer shell wraps the internal mechanism to improve the overall protection level; therefore, this structure can provide a higher protection level (IP64), and when used with corresponding cables, it can meet the use requirements of complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the slot-type sensor structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the front structure of the slot-type sensor structure of the utility model;

[0016] Figure 3 This is a side structural diagram of the slot-type sensor structure of the utility model;

[0017] Figure 4 It is a three-dimensional structural schematic diagram of the light receiving body of the utility model;

[0018] Figure 5 This is a structural cross-sectional view of the light receiving body of the utility model;

[0019] Figure 6 yes Figure 5 AA view;

[0020] Figure 7 It is a three-dimensional structural schematic diagram of the utility model body;

[0021] Figure 8 It is a bottom view of the main body of the utility model;

[0022] Fig. 9 It is a structural sectional view of the main body of the utility model;

[0023] Fig.10 It is a side view of the main body of the utility model;

[0024] Fig.11 yes Fig.10 BB direction view;

[0025] Fig.12 It is a cross-sectional view of the slot-type sensor structure of the utility model.

[0026] In the figure: 1. Main body, 2. Light receiving body, 3. Light-transmitting strip, 4. Circuit board fixing cavity, 5. Lead hole, 6. Shell, 7. Upper step, 8. Insertion cavity, 9. Lower step, 10. Positioning pit, 11. Positioning protrusion, 12. Wire outlet barrel, 13. Vertical groove, 14. Sheath, 15. Jacketing hole, 16. Lead avoidance groove, 17. Arc groove, 18. Boss, 19. Fixing block, 20. Fixing hole, 21. Lead, 22. Direction arrow, 23. Circuit board. DETAILED DESCRIPTION

[0027] The specific implementation of the technical solution of the utility model is further described below through examples and in conjunction with the accompanying drawings.

[0028] Example 1

[0029] The structure of the slot sensor of Example 1 is as follows Figure 1 As shown, the slot-type sensor has a concave shape at the top when viewed from one side (see Figure 3 ), the central notch constitutes the notch of the slot sensor, the lower part is rectangular, the lead of the slot sensor is located at the bottom of the sensor, it includes a body 1 located at the lower part of the sensor and a light receptor 2 arranged at the upper end of the body, the cross section of the body is rectangular, and the body is made of opaque material; the light receptor is U-shaped as a whole and is made of transparent material, and the upper part of the light receptor is two oppositely arranged columnar structures (see Figure 4), the two columnar structures of the photoreceptor are symmetrically provided with raised light-transmitting strips 3 on the opposite surfaces. The light-transmitting strips 3 are long and vertically arranged. The two light-transmitting strips 3 are on the groove walls on both sides of the groove of the groove-type sensor. The light-transmitting strips 3 are used for light to pass through so as to transmit and receive light signals. A circuit board fixing cavity 4 adapted to the circuit board is formed in the body and the photoreceptor. A circuit board 23 is fixed in the circuit board fixing cavity 4. The main body of the circuit board fixing cavity 4 is rectangular. Two oppositely arranged strip-shaped cavities extend upward from the tops of both sides of the rectangular part. The strip-shaped cavities are used to accommodate the light receiving unit and the light emitting unit respectively. A lead hole 5 connected to the circuit board fixing cavity is provided at the bottom of the body. A lead 21 is passed through the lead hole 5. The upper end of the lead 21 is electrically connected to the circuit board 23, and the lower end extends out of the lead hole at the bottom of the body. The upper part of the sensor body and the outer periphery of the photoreceptor are integrally covered with a shell 6. The shell is made of opaque material and covers the upper part of the body and most of the photoreceptor in the form of plastic. The light-transmitting strip on the photoreceptor forms a light-transmitting window at the corresponding position of the shell. The light-transmitting window is used for light to pass through so that the sensor can transmit and receive light signals. The light-transmitting window of this embodiment is in the shape of a long strip and is arranged oppositely on the two side walls of the slot sensor. The shell is provided with a direction arrow 22 on the top surface of the slot to indicate the direction of the slot sensor transmitting unit and receiving unit or the light signal. The slot sensor is cross-shaped at the top when viewed from one side (see Figure 2 ), both sides of the housing in the middle of the sensor are provided with fixing blocks 19, the cross section of the fixing blocks 19 is rectangular, and the fixing blocks are arranged on the front and rear sides of one side of the housing in the width direction, so that the fixing blocks can form a mounting plane with one side of the housing; the fixing blocks on both sides are provided with fixing holes 20. The fixing blocks and the fixing holes are used to fix the sensor, and the fixing blocks and the fixing holes are both symmetrical structures and the fixing blocks are usually arranged in the middle of the sensor.

[0030] Example 2

[0031] The slot sensor structure of Example 2 is concave in shape from a side view, with the notch in the center constituting the slot of the slot sensor, and the lower part is rectangular. The lead of the slot sensor is located at the bottom of the sensor. It includes a body 1 located at the lower part of the sensor and a light receiving body 2 located at the upper end of the body. The cross section of the body is rectangular, and the body is made of high-toughness black polyester (PBT) material; a two-step structure with a small upper step and a large lower step is provided on the outer wall of the body, including an upper step 7 located at the upper part of the body and a lower step 9 located in the middle of the body (see Figure 7 The lower part of the light receiving body is provided with an insertion cavity 8 adapted to the upper step 7 of the body (see Figure 5), when assembling, first insert the circuit board (PCBA) into the circuit board fixing cavity 4 of the body, and then insert the insertion cavity 8 of the lower part of the photoreceptor into the upper step 7 of the upper part of the body, so that the lower part of the photoreceptor covers the upper step 7 of the body; the shell is covered on the lower step 9 of the body and the outer periphery of the photoreceptor, and the outer surface of the shell is flush with the outer surface of the lower part of the body, so that the appearance of the sensor is complete. The lower part of the upper step of this embodiment is provided with a positioning pit 10, from Figure 7 It can be clearly seen that the positioning pits are arranged on the wide side of the body, with two positioning pits on each side, and the two pits are arranged symmetrically. The inner wall of the insertion cavity is provided with a positioning protrusion 11 that matches the positioning pit. Figure 5 It can be clearly seen that the positioning protrusions are arranged on the wide side of the photoreceptor, with two positioning protrusions on each side, and the two positioning protrusions are symmetrically arranged. The positioning pit and the positioning protrusion cooperate to fix the relative position of the main body and the photoreceptor to ensure that the shell does not shift when the plastic is coated. The photoreceptor is U-shaped as a whole and is made of red transparent polycarbonate (PC) material. The upper part of the photoreceptor is two relatively arranged columnar structures. The opposite surfaces of the two columnar structures of the photoreceptor are symmetrically provided with raised light-transmitting strips 3. The light-transmitting strips 3 are long and vertically arranged. The two light-transmitting strips 3 are on the two side walls of the slot of the slot-type sensor. The light-transmitting strips 3 are used for light to pass through in order to transmit and receive light signals. A circuit board fixing cavity 4 adapted to the circuit board is formed in the body and the photoreceptor. The circuit board fixing cavity in the photoreceptor extends upward to the upper end of the photoreceptor on both sides of its width direction. The circuit board fixing cavities on both sides of the upper part of the photoreceptor are used to install the light emitting device and the light receiving device respectively. The inner wall of the circuit board fixing cavity close to the light guide bar is provided with an arc groove 17 parallel to the light guide bar. A circuit board 23 is fixed in the circuit board fixing cavity 4. The main body of the circuit board fixing cavity 4 is rectangular, and two oppositely arranged strip cavities extend upward from the top of the two sides of the rectangular part (see Figure 6 ), the strip-shaped cavity is used to accommodate the light receiving unit and the light emitting unit respectively. The bottom of the body is provided with a lead hole 5 connected to the circuit board fixing cavity, and a lead 21 is passed through the lead hole 5. The upper end of the lead 21 is electrically connected to the circuit board 23 (see Fig.12), the lower end of which extends out of the lead hole at the bottom of the body, and the lead hole is located in the center of the bottom of the body. The upper part of the body of the sensor and the outer periphery of the photoreceptor are integrally covered with a shell 6, which is made of high-toughness black polyester (PBT) material, and covers the upper part of the body and most of the photoreceptor in the form of plastic coating. The light-transmitting strip on the photoreceptor forms a light-transmitting window at the corresponding position of the shell, and the light-transmitting window is used for light to pass through so that the sensor can transmit and receive light signals. The light-transmitting window of this embodiment is in the shape of a long strip, and is arranged on both side walls of the slot of the slot sensor. The shell is provided with a direction arrow 22 on the top surface of the slot, which is used to indicate the direction of the slot sensor transmitting unit and receiving unit or the light signal. The slot sensor is cross-shaped when viewed from one side. Both sides of the shell in the middle of the sensor are provided with fixing blocks 19, and the cross section of the fixing blocks 19 is rectangular. The fixing blocks are arranged on the front and rear sides of one side of the shell in the width direction, so that the fixing blocks can form a mounting plane with one side of the shell; the fixing blocks on both sides are provided with fixing holes 20, and the fixing holes in this embodiment are waist-shaped holes. The fixing block and the fixing hole are used to fix the sensor, the waist-shaped hole can fine-tune the installation position of the sensor, the fixing block and the fixing hole are both symmetrical structures, and the fixing block is set in the middle of the sensor.

[0032] Example 3

[0033] The slot sensor structure of Example 3 is concave in shape at the top when viewed from a side, with the notch in the center constituting the notch of the slot sensor, and the bottom is rectangular. The lead of the slot sensor is located at the bottom of the sensor, and it includes a main body 1 located at the bottom of the sensor and a photoreceptor 2 arranged at the upper end of the main body. The cross-section of the main body is rectangular, and the main body is made of high-toughness black polyester (PBT) material; a two-step structure with a small top and a large bottom is provided on the outer wall of the main body, including an upper step 7 located at the upper part of the main body and a lower step 9 located in the middle part of the main body; an insertion cavity 8 is provided at the lower part of the photoreceptor to match the upper step 7 of the main body. During assembly, the circuit board (PCBA) is first inserted into the circuit board fixing cavity 4 of the main body, and then the insertion cavity 8 of the lower part of the photoreceptor is inserted into the upper step 7 of the upper part of the main body, so that the lower part of the photoreceptor covers the upper step 7 of the main body; the shell is coated on the lower step 9 of the main body and the outer periphery of the photoreceptor, and the outer surface of the shell is flush with the outer surface of the lower part of the main body, so that the appearance of the sensor is complete. The lower part of the upper step of this embodiment is provided with a positioning pit 10, from Figure 7 It can be clearly seen that the positioning pits are arranged on the wide side of the body, with two positioning pits on each side, and the two pits are arranged symmetrically. The inner wall of the insertion cavity is provided with a positioning protrusion 11 that matches the positioning pit. Figure 5It can be clearly seen that the positioning protrusions are arranged on the wide side of the light receptor, with two positioning protrusions on each side, and the two positioning protrusions are arranged symmetrically. The positioning pit and the positioning protrusion cooperate to fix the relative position of the body and the light receptor to ensure that the shell does not shift when the plastic is coated. Both sides of the lead hole at the bottom of the body are provided with downwardly opening nesting holes 15 (see Figure 8 ), the nesting hole is a rectangular hole, which is used to position the body when assembling the sensor. In this embodiment, there are four nesting holes, two of which are arranged on each side of the lead hole and are arranged symmetrically. The photoreceptor is U-shaped as a whole and is made of red transparent polycarbonate (PC) material. The upper part of the photoreceptor is two columnar structures arranged oppositely. The opposite surfaces of the two columnar structures of the photoreceptor are symmetrically provided with raised light-transmitting strips 3. The light-transmitting strips 3 are long and vertically arranged. The two light-transmitting strips 3 are on the groove walls on both sides of the groove of the groove-type sensor. The light-transmitting strips 3 are used for light to pass through so as to transmit and receive light signals. A circuit board fixing cavity 4 adapted to the circuit board is formed in the body and the photoreceptor. The circuit board fixing cavity in the photoreceptor extends upward on both sides of the width direction to the upper end of the photoreceptor. The circuit board fixing cavities on both sides of the upper part of the photoreceptor are used to install light emitting devices and light receiving devices respectively. The inner wall of the circuit board fixing cavity close to the light guide bar is provided with an arc groove 17 parallel to the light guide bar. The cross-section of the circuit board fixing cavity is in the shape of a convex letter, and the body of the circuit board is embedded in the wide side of the convex-shaped circuit board fixing cavity. Lead avoidance grooves 16 are also provided on the front and rear cavity walls of the circuit board fixing cavity, and the lead avoidance grooves are arranged in the center of the wide side of the circuit board fixing cavity. The wide side of the circuit board fixing cavity with a convex-shaped cross-section is used to insert the body of the circuit board and fix it so that it does not move; the narrow side of the circuit board fixing cavity is used to accommodate components on the circuit board. Since the thickness of the circuit board fixing cavity is usually smaller than the diameter of the lead, the lead avoidance groove is provided to facilitate the assembly operation of the lead. A circuit board 23 is fixed in the circuit board fixing cavity 4. The main body of the circuit board fixing cavity 4 is rectangular, and two oppositely arranged strip cavities extend upward from the top of both sides of the rectangular part (see Figure 6 ), the strip-shaped cavity is used to accommodate the light receiving unit and the light emitting unit respectively. The bottom of the body is provided with a lead hole 5 connected to the circuit board fixing cavity, and a lead 21 is passed through the lead hole 5. The upper end of the lead 21 is electrically connected to the circuit board 23, and the lower end extends out of the lead hole at the bottom of the body. The lead hole is located in the center of the bottom of the body, and the hole wall of the lead hole extends up and down to form a wire outlet barrel 12 (see Fig.10 Fig.11 ), the outlet barrel is provided with a vertical groove 13 on the barrel wall, and the outlet barrel is provided with a sheath 14 (see Fig. 9), the inner diameter of the sheath is a truncated cone structure with a small top and a large bottom, and the sheath is made of soft polyvinyl chloride (PVC) material. A vertical groove is set on the wall of the outlet barrel to prevent the sheath from rotating. The sheath with a small inner diameter at the top and a large inner diameter at the bottom is used for interference fit with the lead wire, and plays a sealing role to prevent external dust, water vapor, etc. from entering the interior of the sensor. The upper part of the sensor body and the outer periphery of the photoreceptor are integrally covered with a shell 6. The shell is made of high-toughness black polyester (PBT) material, and the upper part of the body and most of the photoreceptor are covered in the form of plastic wrap. The light-transmitting strip on the photoreceptor forms a light-transmitting window at the corresponding position of the shell. The light-transmitting window is used for light to pass through so that the sensor can transmit and receive light signals. The light-transmitting window of this embodiment is in the shape of a long strip and is arranged oppositely on the two side walls of the slot of the slot sensor. In this embodiment, bosses 18 are provided on both sides of the thickness direction of the photoreceptor. The bosses are generally concave in shape and the bottom edge is parallel to the bottom edge of the photoreceptor. When the shell covers the photoreceptor, the top surface of the boss is flush with the surface of the shell. The boss can play the role of fixing the shell. After the photoreceptor covers the shell, it prevents the shell from moving relative to the photoreceptor after being subjected to force. The shell is provided with a directional arrow 22 on the top surface of the notch, which is used to indicate the direction of the slot sensor transmitting unit and receiving unit or the light signal. The slot sensor is cross-shaped at the top when viewed from one side. Fixed blocks 19 are provided on both sides of the shell in the middle of the sensor. The cross-section of the fixed block 19 is rectangular. The fixed blocks are arranged on the front and rear sides of one side of the shell in the width direction, so that the fixed blocks can form a mounting plane with one side of the shell; the fixed blocks on both sides are provided with fixing holes 20, and the fixing holes in this embodiment are waist-shaped holes. The fixing blocks and the fixing holes are used to fix the sensor. The waist-shaped hole can fine-tune the installation position of the sensor. The fixed blocks and the fixing holes are symmetrical structures and the fixed blocks are arranged in the middle and lower part of the sensor.

[0034] The main body and the photoreceptor of the utility model form a circuit board fixing cavity adapted to the circuit board (PCBA board), which can completely fix the circuit board in the cavity, and the circuit board is fixed in three directions of x-axis, y-axis and z-axis, the cable connection is reliable, the circuit is firmly fixed and will not move, and the structural stability is good. On the other hand, the upper part of the main body of the utility model and the periphery of the photoreceptor adopt an integrally coated (plastic-coated) shell structure. Compared with the snap-on assembly method of the prior art, there is no gap at the joint of the shell, and the lead-out wire sheath adopts a gradually tightening interference design, which improves the protection level at the outlet; using the secondary plastic-coating process, the shell wraps the internal mechanism, and the dust, water vapor, etc. from the outside cannot enter the shell, and will not affect the circuit inside the photoelectric sensor, thereby improving the protection level. When used with the corresponding cable, the protection level of the slot-type photoelectric sensor of the utility model reaches IP64, thereby ensuring the sensitivity or accuracy of the product.

[0035] In addition to the above-mentioned embodiments, within the scope disclosed in the claims and the specification of the utility model, the technical features or technical data of the utility model can be reselected and combined to form new embodiments, which can be achieved by those skilled in the art without creative work. Therefore, these embodiments that are not described in detail in the utility model should also be regarded as specific embodiments of the utility model and within the protection scope of the utility model.

Claims

1. A slot-type sensor structure, comprising a circuit board, characterized in that: The slot-type sensor comprises a main body (1) and a photoreceptor (2) plugged into the upper end of the main body, the photoreceptor being U-shaped as a whole and being a transparent structure, and symmetrically provided with raised light-transmitting strips (3) on opposite faces of the U-shape of the photoreceptor, a circuit board fixing cavity (4) adapted to the circuit board being formed in the main body and the photoreceptor, a lead hole (5) communicating with the circuit board fixing cavity being provided at the bottom of the main body, the upper part of the main body and the outer circumference of the photoreceptor being integrally covered with a shell (6), and the light-transmitting strip forming a light-transmitting window at a corresponding position of the shell.

2. The slot sensor structure according to claim 1, characterized in that: The cross section of the main body is rectangular, and the main body is provided with a two-step structure with a smaller upper step and a larger lower step. The lower part of the light receptor is provided with an insertion cavity (8) adapted to the upper step (7) of the main body, and the shell covers the lower step (9) of the main body and the periphery of the light receptor.

3. The slot sensor structure according to claim 2, characterized in that: A positioning pit (10) is provided at the lower part of the upper step, and a positioning protrusion (11) matching the positioning pit is provided on the inner wall of the insertion cavity, and the positioning pit is arranged on the wide side of the body.

4. The slot sensor structure according to claim 2, characterized in that: The lead-in hole is located at the center of the bottom of the body, and the hole wall of the lead-in hole extends up and down to form a wire outlet barrel (12). The barrel wall of the wire outlet barrel is provided with a vertical groove (13), and the wire outlet barrel is provided with a sheath (14) covering the wire outlet barrel. The inner diameter of the sheath is a truncated cone structure with a small upper part and a large lower part.

5. The slot sensor structure according to claim 1, characterized in that: Both sides of the lead-in hole at the bottom of the body are provided with downwardly opening casing holes (15), wherein the casing holes are rectangular holes.

6. The slot sensor structure according to claim 1, characterized in that: The cross section of the circuit board fixing cavity on the main body is in a convex shape, the board body of the circuit board is adapted to the wide side of the convex circuit board fixing cavity, and a lead wire avoidance groove (16) is also provided on the cavity wall of the circuit board fixing cavity, and the lead wire avoidance groove is arranged in the center of the wide side of the circuit board fixing cavity.

7. The slot sensor structure according to claim 6, characterized in that: The circuit board fixing cavity in the light receptor has two sides in the width direction extending upward to the upper end of the light receptor, and an arc groove (17) parallel to the light guide bar is provided on the inner wall of the circuit board fixing cavity close to the light guide bar.

8. The slot sensor structure according to claim 1, characterized in that: Bosses (18) are provided on both sides of the light receptor in the thickness direction. The bosses are in a concave shape as a whole and their bottom edges are parallel to the bottom edge of the light receptor. When the shell covers the light receptor, the top surface of the bosses is flush with the surface of the shell.

9. The slot sensor structure according to any one of claims 1 to 8, characterized in that: Both sides of the housing of the sensor are provided with fixing blocks (19), the fixing blocks are arranged on the front and rear sides of one side in the width direction of the housing, and the fixing blocks are provided with fixing holes (20).

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