Waterproof and oil-proof proximity sensor
By setting positioning holes and fixing grooves on the rubber plug of the proximity sensor and filling the sealing layer, the problem of oil and water in harsh environments is solved, achieving a higher sealing effect and a longer service life.
Patent Information
- Application Number
- CN202420830149.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-04-19
AI Technical Summary
Existing proximity sensors are prone to oil and water in harsh environments, resulting in unstable signal transmission and affecting the normal operation of the equipment.
A waterproof and oil-proof proximity sensor is designed. By setting a positioning hole and a fixing groove on the glue plug, the cable passes through the positioning hole, and the sealing layer fills the outside of the cable in the fixing groove to enhance the sealing effect.
It effectively improves the sealing effect between the glue plug and the cable, prevents water and oil from intrusion, extends the service life of the equipment, and improves the practicality of the product.
Smart Images
Figure CN222887558U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a sensor, in particular to a waterproof and oil-proof proximity sensor. Background Art
[0002] A proximity sensor is a device with the ability to sense the approach of an object. It uses a displacement sensor's sensitivity to an approaching object to identify the approach of the object and outputs a corresponding switching signal.
[0003] A proximity sensor usually includes a cable for transmitting signals. The cable passes through a perforation on the outer shell of the proximity sensor and is connected to a circuit board inside the proximity sensor. However, for existing proximity sensors, there is a gap between the cable and the perforation. Moreover, after long-term use of the proximity sensor, affected by wear, deformation, shrinkage, etc., the gap between the cable and the perforation further increases. When used in a harsh environment, the proximity sensor is prone to oil and water ingress, resulting in the proximity sensor being unable to work properly, bringing trouble to users. Summary of the Utility Model
[0004] Based on this, in view of the deficiencies in the prior art, it is necessary to provide a waterproof and oil-proof proximity sensor.
[0005] The technical solution of the utility model is as follows: A waterproof and oil-proof proximity sensor includes a housing main body, a rubber plug installed on the housing main body, a circuit board arranged inside the housing main body, a cable passing through the rubber plug and connected to the circuit board, a sealing layer filled between the rubber plug and the cable, and an upper cover covering the housing main body and limiting the rubber plug. The rubber plug includes a clamping part, a positioning part connected to the rear side of the clamping part, and a functional part connected to the front side of the clamping part. A positioning hole is provided on the rubber plug, and the positioning hole horizontally penetrates the positioning part, the clamping part, and the functional part. A fixing groove is further provided on the inner wall of the positioning hole, and the fixing groove is distributed around the central axis of the positioning hole. Moreover, a glue injection hole is provided on the positioning part, and the glue injection hole extends downward from the upper end surface of the positioning part and communicates with the fixing groove. The cable is installed on the positioning hole of the rubber plug and extends out from the positioning hole. The sealing layer is filled in the fixing groove and wraps around the outer side of the cable.
[0006] In one embodiment, the upper end surface of the housing main body is flat, and the housing main body is provided with a receiving groove extending downward from the upper end surface. A fixing plate is provided on the front side of the housing main body, and the inner side surface of the fixing plate is a wall of the receiving groove.
[0007] In one embodiment, a first clamping groove is provided on the outer side surface of the fixing plate, and the shape of the clamping part of the rubber plug corresponds to the shape of the first clamping groove. The clamping part of the rubber plug is installed in the first clamping groove.
[0008] In one embodiment, the bottom of the first card slot is provided with a second card slot penetrating inward. The positioning part of the rubber plug is stuck outside the front slot opening of the second card slot, and the positioning part of the rubber plug is installed in the second card slot.
[0009] In one embodiment, both the first card slot and the second card slot extend to the upper end surface of the housing body, and the slot wall on the side of the first card slot close to the bottom surface of the housing body is arc-shaped, and the slot wall on the side of the second card slot close to the bottom surface of the housing body is also arc-shaped.
[0010] In one embodiment, assembly holes are provided on the slot walls on both sides of the first card slot, and through holes are respectively provided at positions close to both sides of the positioning part. During assembly, the through holes of the positioning part are aligned with the assembly holes. The waterproof and oil-proof proximity sensor further includes a plurality of fixing parts, and the fixing parts pass through the through holes of the rubber plug and are installed and fixed with the assembly holes of the housing body.
[0011] In one embodiment, a snap ring is provided at the bottom of the upper cover, and the outer circumference of the snap ring corresponds to the inner space of the receiving groove. During assembly, the upper cover is attached to the upper end surface of the housing body, and the snap ring is stuck on the inner side surface of the receiving groove.
[0012] In one embodiment, the rubber plug is further provided with an exhaust hole, and the exhaust hole extends downward from the upper end surface of the positioning part and communicates with the fixing groove.
[0013] The beneficial effect of the waterproof and oil-proof proximity sensor of the present utility model lies in that: by providing a positioning hole on the rubber plug, a fixing groove is further provided on the hole wall of the positioning hole. The waterproof and oil-proof proximity sensor further includes a sealing layer. The cable passes through the positioning hole, and the sealing layer fills the fixing groove and wraps around the outer side of the cable, effectively improving the sealing effect between the rubber plug and the cable, preventing water and oil, improving the service life of the product, and having strong practicability. Description of the Drawings
[0014] Figure 1 is a schematic structural diagram of the waterproof and oil-proof proximity sensor of the present utility model;
[0015] Figure 2 is Figure 1 an exploded view of the waterproof and oil-proof proximity sensor shown;
[0016] Figure 3 , Figure 4 is Figure 2 an exploded view of the waterproof and oil-proof proximity sensor shown from different angles;
[0017] Figure 5 is a cross-sectional view between the cable, the rubber plug and the sealing layer of the waterproof and oil-proof proximity sensor of the present utility model. Detailed Embodiments
[0018] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following describes the specific embodiments of the present utility model in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0019] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
[0020] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0021] In the present utility model, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0022] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.
[0024] Please refer to Figures 1 to 5 , the present utility model provides a waterproof and oil-proof proximity sensor, which includes a housing main body 10, a rubber plug 20 installed on the housing main body 10, a circuit board disposed inside the housing main body 10, a cable 30 passing through the rubber plug 20 and connected to the circuit board, a sealing layer 50 filled between the rubber plug 20 and the cable 30, and an upper cover 40 covering the housing main body 10 and limiting the rubber plug 20. The sealing layer 50 is formed by curing a sealing glue.
[0025] The housing main body 10 includes an upper end surface that is flush, and the housing main body 10 is provided with a receiving groove 11 extending downward from the upper end surface. A fixing plate 12 is provided on the front side of the housing main body 10. The inner side surface of the fixing plate 12 is a groove wall of the receiving groove 11. The outer side surface of the fixing plate 12 is provided with a first card slot 13. The bottom of the first card slot 13 is provided with a second card slot 14 penetrating inward. Both the first card slot 13 and the second card slot 14 extend to the upper end surface of the housing main body 10. And the groove wall on one side of the first card slot 13 close to the bottom surface of the housing main body 10 is arc-shaped, and the groove wall on one side of the second card slot 14 close to the bottom surface of the housing main body 10 is also arc-shaped. Assembly holes 15 are provided on both groove walls of the first card slot 13.
[0026] The rubber plug 20 includes a clamping part 21, a positioning part 22 connected to the rear side of the clamping part 21, and a functional part 23 connected to the front side of the clamping part 21. The outer shape of the clamping part 21 corresponds to the groove shape of the first clamping groove 13. Through holes 27 are respectively provided at positions on both sides of the clamping part 21. The outer shape of the positioning part 22 corresponds to the groove shape of the first clamping groove 13. A positioning hole 24 is provided on the rubber plug 20, and the diameter of the positioning hole 24 is the same as or slightly larger than the outer diameter of the cable 30. The positioning hole 24 horizontally penetrates through the positioning part 22, the clamping part 21, and the functional part 23. A fixing groove 25 is further provided on the inner wall of the positioning hole 24. The fixing groove 25 is distributed around the central axis of the positioning hole 24. Moreover, a glue injection hole 26 is provided on the positioning part 22. The glue injection hole 26 extends downward from the upper end surface of the positioning part 22 and communicates with the fixing groove 25.
[0027] During assembly, the cable 30 is installed on the positioning hole 24 of the rubber plug 20 and extends out from the positioning hole 24. Glue is injected into the positioning groove through the glue injection port, so that the sealing glue fills the fixing groove 25 and wraps around the outer side of the cable 30. After the sealing glue cures, the sealing layer 50 is formed. The sealing layer 50 fills the fixing groove 25 and wraps around the outer side of the cable 30. Then, the rubber plug 20 is installed on the fixing plate 12. The clamping part 21 of the rubber plug 20 is installed in the first clamping groove 13 and is stuck outside the front side slot opening of the second clamping groove 14. The positioning part 22 of the rubber plug 20 is installed in the second clamping groove 14. The through holes 27 of the clamping part 21 are aligned with the assembly holes 15. The present invention further includes a plurality of fixing members 60. The fixing members 60 pass through the through holes 27 of the rubber plug 20 and are fixedly installed with the assembly holes 15 of the housing main body 10. Preferably, the rubber plug 20 further has an exhaust hole 28. The exhaust hole 28 extends downward from the upper end surface of the positioning part 22 and communicates with the fixing groove 25. During glue injection, the exhaust hole 28 is used to assist in exhausting air.
[0028] In addition, a snap ring 41 is provided at the bottom of the upper cover 40. The outer circumference of the snap ring 41 corresponds to the inner space of the receiving groove 11. During assembly, the upper cover 40 is attached to the upper end surface of the housing main body 10, and the snap ring 41 is stuck on the inner side surface of the receiving groove 11.
[0029] The beneficial effects of the waterproof and oil-proof proximity sensor of the present invention are as follows: By providing the positioning hole 24 on the rubber plug 20, and further providing the fixing groove 25 on the inner wall of the positioning hole 24, the waterproof and oil-proof proximity sensor further includes a sealing layer 50. The cable 30 passes through the positioning hole 24, and the sealing layer 50 fills the fixing groove 25 and wraps around the outer side of the cable 30, effectively improving the sealing effect between the rubber plug 20 and the cable 30, preventing water and oil, increasing the service life of the product, and having strong practicability.
[0030] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.
[0031] The above-described embodiments only express several implementation manners of the present utility model, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.
Claims
1. A waterproof and oil-proof proximity sensor, characterized in that: The invention comprises a shell body, a rubber plug mounted on the shell body, a circuit board arranged inside the shell body, a cable passing through the rubber plug and connected to the circuit board, a sealing layer filled between the rubber plug and the cable, and an upper cover arranged on the shell body and limiting the rubber plug. The rubber plug comprises a clamping part, a positioning part connected to the rear side of the clamping part, and a functional part connected to the front side of the clamping part. A positioning hole is provided on the rubber plug. The positioning hole horizontally penetrates the positioning part, the clamping part and the functional part. A fixing groove is further provided on the hole wall of the positioning hole. The fixing groove is distributed around the central axis of the positioning hole. In addition, a glue injection hole is also provided on the positioning part. The glue injection hole extends downward from the upper end surface of the positioning part and is connected to the fixing groove. The cable is mounted on the positioning hole of the rubber plug and extends out from the positioning hole. The sealing layer is filled in the fixing groove and wrapped around the outside of the cable.
2. The waterproof and oil-proof proximity sensor according to claim 1, characterized in that: The upper end surface of the shell body is arranged flush, and the shell body is provided with a receiving groove extending downward from the upper end surface. A fixing plate is provided at the front side of the shell body, and the inner side surface of the fixing plate is a groove wall of the receiving groove.
3. The waterproof and oil-proof proximity sensor according to claim 2, characterized in that: A first clamping groove is arranged on the outer side surface of the fixing plate, the outer shape of the clamping portion corresponds to the groove shape of the first clamping groove, and the clamping portion of the rubber plug is installed in the first clamping groove.
4. The waterproof and oil-proof proximity sensor according to claim 3, characterized in that: A second slot is provided at the bottom of the first slot and penetrates inwards. The positioning portion of the rubber plug is clamped at the outside of the front notch of the second slot, and the positioning portion of the rubber plug is installed in the second slot.
5. The waterproof and oil-proof proximity sensor according to claim 4, characterized in that: The first and second slots both extend to the upper end surface of the shell body, and the slot wall of the first slot on the side close to the bottom surface of the shell body is arc-shaped, and the slot wall of the second slot on the side close to the bottom surface of the shell body is also arc-shaped.
6. The waterproof and oil-proof proximity sensor according to claim 4, characterized in that: Assembly holes are provided on the groove walls on both sides of the first groove, and through holes are respectively provided on both sides of the locking part. During assembly, the through holes of the locking part are aligned with the assembly holes. The waterproof and oil-proof proximity sensor also includes a plurality of fixing parts, which pass through the through holes of the rubber plug and are installed and fixed with the assembly holes of the shell body.
7. The waterproof and oil-proof proximity sensor according to claim 2, characterized in that: A snap ring is provided at the bottom of the upper cover, and the outer periphery of the snap ring corresponds to the inner space of the receiving groove. During assembly, the upper cover fits the upper end surface of the shell body, and the snap ring is clamped on the inner side of the receiving groove.
8. The waterproof and oil-proof proximity sensor according to claim 1, characterized in that: The rubber plug is also provided with an exhaust hole, which extends downward from the upper end surface of the positioning portion and is communicated with the fixing groove.