Metallic inductive proximity sensor

Abstract

The utility model discloses a kind of metal induction proximity sensors, it is close to the field of sensor, including shell, the inside of shell is provided with mounting groove, and the bottom end of mounting groove inner wall is provided with multiple groups of magnetic block, the top of magnetic block is equipped with circuit board, and the bottom of circuit board is provided with magnetic reed switch, the top of circuit board is provided with adjusting screw, the top of mounting groove inner wall is equipped with upper cover, and the inner wall of mounting groove is fixed with multiple groups of clamping assembly, limiting is carried out to circuit board by clamping assembly, the side of shell is equipped with power cord.The utility model uses shell encapsulation magnetic block and magnetic reed switch, circuit board is fixed in the inner wall of mounting groove by clamping assembly, avoid to shake and cause the problem of poor contact to appear when using, by upper cover it is closed with corrosion resistance, high pressure resistance and high temperature resistance advantage, also have key positioning function, can avoid production badness and reduce rework cost etc. due to installation problem.

Description

Technical Field

[0001] This utility model relates to the field of proximity sensors, specifically a metal-based proximity sensor. Background Technology

[0002] A proximity sensor is a device that can detect the approach or distance of an object from the sensor's location. It is commonly used in automation systems. It can trigger a corresponding output signal by sensing the presence or absence of an object without physical contact. Currently, most proximity sensors on the market require an external magnet to trigger a magnetic switch, and some require a power supply to trigger the switch. They cannot be used with range hood covers that do not have this device. If this requirement is met, it would require a higher production cost to implement this function.

[0003] Existing proximity sensors only have a reed switch soldered onto the wire and resin filled into the housing. This device requires an external magnet to trigger the switch, increasing costs in actual production. Furthermore, the magnet used in the structure lacks a positioning function, requiring constant positioning during production, further increasing costs. The existing proximity sensor structure uses glue to fix the magnet to the PCB, resulting in poor accuracy and many defective products. Moreover, it only uses a reed switch, which cannot be densely installed, as dense installation can lead to malfunctions. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a metal-based proximity sensor to solve the technical problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a metal proximity sensor, comprising a housing, an internal mounting groove, and multiple sets of magnetic blocks at the bottom of the inner wall of the mounting groove. A circuit board is mounted on the top of the magnetic blocks, and a reed switch is located at the bottom of the circuit board. An adjusting screw is located on the top of the circuit board. A top cover is mounted on the top of the inner wall of the mounting groove, and multiple sets of locking components are fixed to the inner wall of the mounting groove to limit the circuit board. A power cord is mounted on one side of the housing.

[0006] By adopting the above technical solution, the housing encapsulates the magnetic block and reed switch, and the circuit board is fixed to the inner wall of the mounting slot by the snap-fit ​​assembly, which avoids the problem of poor contact caused by shaking during use. The top cover seals it, which has the advantages of corrosion resistance, high pressure resistance and high temperature resistance, and also has the key positioning function, which can avoid production defects caused by installation problems and reduce rework costs.

[0007] The present invention is further configured such that the engaging assembly includes a vertical rod and a protrusion, the vertical rod is fixed to the inner wall of the mounting groove, and the end of the vertical rod is fixed with a protrusion, and one side of the top of the protrusion is inclined.

[0008] Preferably, the circuit board is installed, and during installation, the circuit board will press against the protrusion. Since the top of the protrusion is set with a sloping side, the protrusion will drive the vertical rod to shift to one side. When the top of the circuit board contacts the top of the magnetic block, the vertical rod drives the protrusion to reset, and the bottom of the protrusion contacts the top of the circuit board, thereby limiting the circuit board.

[0009] The present invention is further configured such that the top of the upper cover has an insertion hole, and the outer wall of the insertion hole fits against the outer wall of the adjusting screw.

[0010] Preferably, the insertion hole allows for easy installation of the adjusting screw.

[0011] The present invention is further configured such that a slot is provided on the top of the adjusting screw.

[0012] Preferably, the slotted opening allows for easy use of tools to secure the adjusting screw to the top cover.

[0013] The present invention is further configured such that multiple sets of limiting grooves are provided on the outer wall of the circuit board, and multiple sets of limiting posts are fixed on both sides of the inner wall of the mounting groove.

[0014] Preferably, the limiting groove can cooperate with the limiting post to limit the circuit board and prevent the circuit board from shaking inside the mounting groove.

[0015] The present invention is further configured such that a through hole is provided on one side of the inner wall of the mounting groove.

[0016] Preferably, the through-hole allows for easy installation of the power cord.

[0017] In summary, the present invention has the following main advantages:

[0018] This utility model features a mounting slot, a top cover, a magnetic block, and a reed switch. The housing encapsulates the magnetic block and the reed switch, and the circuit board is fixed to the inner wall of the mounting slot via a snap-fit ​​assembly. This prevents the circuit board from shaking during use and causing poor contact. The top cover provides corrosion resistance, high pressure resistance, and high temperature resistance, and also has a crucial positioning function. This helps avoid production defects caused by installation problems and reduces rework costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram showing the connection between the top cover and the shell of this utility model;

[0021] Figure 3 This is a schematic diagram of the installation structure of the circuit board of this utility model;

[0022] Figure 4 This is a schematic diagram of the installation structure of the magnetic block of this utility model;

[0023] Figure 5 This is a schematic diagram showing the disassembled parts of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Housing; 2. Power cord; 3. Top cover; 31. Socket; 4. Mounting slot; 5. Adjusting screw; 51. Slot; 6. Circuit board; 7. Vertical rod; 71. Protrusion; 8. Magnetic block; 9. Reed switch; 10. Limiting post; 11. Limiting slot; 12. Through hole. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The embodiments of this utility model will be described below based on its overall structure.

[0028] Please see Figures 1-5 The device includes a housing 1, an internal mounting groove 4, and multiple sets of magnetic blocks 8 at the bottom of the inner wall of the mounting groove 4. A circuit board 6 is mounted on the top of the magnetic blocks 8, and a reed switch 9 is mounted on the bottom of the circuit board 6. An adjusting screw 5 is mounted on the top of the circuit board 6. A top cover 3 is mounted on the top of the inner wall of the mounting groove 4, and multiple sets of locking components are fixed to the inner wall of the mounting groove 4. The locking components limit the circuit board 6 to prevent it from shaking inside the housing 1, which could lead to poor contact. A power cord 2 is mounted on one side of the housing 1.

[0029] For details regarding the above embodiments, please refer to [link / reference]. Figure 3The engaging assembly includes a vertical rod 7 and a protrusion 71. The vertical rod 7 is fixed to the inner wall of the mounting groove 4, and the end of the vertical rod 7 is fixed with a protrusion 71. The vertical rod 7 and the protrusion 71 are made of plastic, and one side of the top of the protrusion 71 is set with an incline. When the circuit board 6 is installed, the circuit board 6 will squeeze the protrusion 71. Because one side of the top of the protrusion 71 is set with an incline, the protrusion 71 will drive the vertical rod 7 to shift to one side. When the top of the circuit board 6 contacts the top of the magnetic block 8, the vertical rod 7 drives the protrusion 71 to reset. The bottom of the protrusion 71 contacts the top of the circuit board 6, thereby limiting the position of the circuit board 6.

[0030] For details regarding the above embodiments, please refer to [link / reference]. Figure 2 and Figure 3 The top of the cover 3 has a socket 31, and the outer wall of the socket 31 fits against the outer wall of the adjusting screw 5. The adjusting screw 5 can be easily installed through the socket 31.

[0031] For details regarding the above embodiments, please refer to [link / reference]. Figure 3 The top of the adjusting screw 5 has a slot 51, which allows tools to be used to easily fix the adjusting screw 5 to the top cover 3.

[0032] For details regarding the above embodiments, please refer to [link / reference]. Figure 3 and Figure 5 The outer wall of the circuit board 6 has multiple sets of limiting grooves 11, and the inner walls of the mounting groove 4 have multiple sets of limiting posts 10 fixed on both sides. The limiting grooves 11 can cooperate with the limiting posts 10 to limit the circuit board 6 and prevent the circuit board 6 from shaking inside the mounting groove 4.

[0033] For details regarding the above embodiments, please refer to [link / reference]. Figure 4 A through hole 12 is provided on one side of the inner wall of the mounting groove 4, through which the power cord 2 can be easily installed.

[0034] In practical operation, the present invention is as follows: The reed switch 9 is welded to the bottom of the circuit board 6, and the magnetic block 8 is installed at the bottom of the inner wall of the mounting groove 4. Then, the circuit board 6 is installed. During installation, the circuit board 6 will press against the protrusion 71. Due to the inclined surface on one side of the top of the protrusion 71, the protrusion 71 will cause the vertical rod 7 to shift to one side. When the top of the circuit board 6 contacts the top of the magnetic block 8, the vertical rod 7 causes the protrusion 71 to reset, and the bottom of the protrusion 71 contacts the top of the circuit board 6, thus limiting the position of the circuit board 6. Then, the power cord 2 is inserted into the through hole 12, and the power cord 2 is welded to the circuit board 6. Next, the adjusting screw 5 is connected to the top cover 3. The adjusting screw 5 is connected to the insertion hole 31 via threads. Then, the top cover 3 is installed, and the adjusting screw 5 contacts the top of the circuit board 6. Finally, an appropriate amount of resin is injected into the connection between the top cover 3 and the housing 1 to fix the top cover 3 to the housing 1.

[0035] The magnetic proximity sensor combines a reed switch and a magnet. When a sensing object (materials such as iron, nickel, cobalt, etc.) approaches, the reed switch closes, outputting a conduction signal. Upon receiving the signal, the host computer will start the next program to operate normally.

[0036] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A metal-based proximity sensor, comprising a housing (1), characterized in that: The housing (1) has an internal mounting groove (4), and the bottom of the inner wall of the mounting groove (4) is provided with multiple sets of magnetic blocks (8). A circuit board (6) is installed on the top of the magnetic blocks (8), and a magnetic reed switch (9) is provided on the bottom of the circuit board (6). An adjusting screw (5) is provided on the top of the circuit board (6). A top cover (3) is installed on the top of the inner wall of the mounting groove (4), and multiple sets of locking components are fixed on the inner wall of the mounting groove (4). The circuit board (6) is limited by the locking components. A power cord (2) is installed on one side of the housing (1).

2. The metal-based proximity sensor according to claim 1, characterized in that: The engaging assembly includes a vertical rod (7) and a protrusion (71). The vertical rod (7) is fixed to the inner wall of the mounting groove (4), and the end of the vertical rod (7) is fixed with a protrusion (71), and one side of the top of the protrusion (71) is inclined.

3. The metal-based proximity sensor according to claim 1, characterized in that: The top of the cover (3) has an insertion hole (31), and the outer wall of the insertion hole (31) is in contact with the outer wall of the adjusting screw (5).

4. The metal-based proximity sensor according to claim 1, characterized in that: The top of the adjusting screw (5) has a slot (51).

5. The metal-based proximity sensor according to claim 1, characterized in that: The outer wall of the circuit board (6) has multiple sets of limiting grooves (11), and the two sides of the inner wall of the mounting groove (4) have multiple sets of limiting posts (10).

6. The metal-based proximity sensor according to claim 1, characterized in that: A through hole (12) is provided on one side of the inner wall of the mounting groove (4).

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