Magnetic switch for preventing dry reed damage

Abstract

The utility model belongs to magnetic switch technical field, and disclose a kind of magnetic switch for preventing dry Reed damage, still include: heat shrink tube, wrapping in the glass body outside of dry Reed;Terminal, for the pin is fixed on the corresponding solder joint of PCB board, to realize dry Reed and PCB board connection, the gap between the heat shrink tube and PCB board is left.The utility model is fixed in the solder joint position of the pin of dry Reed on the PCB board by terminal, can guarantee that the pin will not follow radial pressure, make it not extruded by external force;The gap between the heat shrink tube and PCB board is left, that is, dry Reed and PCB board are separated, which makes dry Reed in the later use process, there is no collision with PCB board to cause the glass body on dry Reed to break condition;Magnet is fixed by adhesive and pasted outside heat shrink tube, not directly contact with dry Reed, can avoid damaging dry Reed, play the effect of protecting dry Reed.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic switch technology, and specifically relates to a magnetic switch that prevents damage to reed switches. Background Technology

[0002] Reed switches, as passive components that use magnetic field signals to control the on / off state of circuits, are widely used in liquid level detection, position sensing and other fields due to their simple structure, low cost and high reliability.

[0003] Traditional installation methods typically involve directly soldering the reed switch to the PCB board or bending the reed switch leads before soldering them. When bending the reed switch leads and soldering them to the PCB board, the bending force can easily cause the glass body of the reed switch to shatter, generating mechanical stress. When making a holding magnetic switch, glue is used to directly fix the magnet to the glass surface of the reed switch. When the magnet is directly fixed to the glass surface of the reed switch, the direct contact between the magnet and the glass can easily cause the glass to shatter. Therefore, we propose a magnetic switch to prevent damage to the reed switch and solve the above problems. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a magnetic switch that prevents damage to the reed switch, thus solving the issue that traditional installation methods easily lead to the glass body of the reed switch shattering during use.

[0005] This utility model is achieved through the following solution: a magnetic switch to prevent damage to a reed switch, comprising a reed switch, a PCB board, a magnet, and a housing, wherein the reed switch is connected to pins, and the PCB board is provided with solder points corresponding to the pins; the magnetic switch further comprises:

[0006] Heat shrink tubing, which wraps around the glass body of a reed switch;

[0007] The terminal block is used to fix the pin to the corresponding solder point on the PCB board to realize the connection between the reed switch and the PCB board, and a gap is left between the heat shrink tubing and the PCB board.

[0008] The magnet is attached and fixed to the outside of the heat shrink tubing at the set position of the reed switch, and the outer shell covers the PCB board, reed switch, heat shrink tubing, magnet and wiring terminals.

[0009] A further improvement of this invention for preventing damage to the reed switch is that it also includes a silicone rubber layer, which is wrapped around the PCB board, heat shrink tubing, reed switch, and terminals.

[0010] A further improvement of this invention for preventing damage to the reed switch is that it also includes a sealant layer, which is filled between the silicone rubber layer and the outer casing.

[0011] A further improvement of this invention for preventing damage to the reed switch is that a plug is fixedly connected to the end of the housing, and the plug is connected to the PCB board.

[0012] A further improvement of this invention for preventing damage to the reed switch is that the inner wall of the outer casing is covered with a magnetic shielding layer.

[0013] A further improvement of this invention for preventing damage to the reed switch is that a retaining ring for fixing the outer shell is fixedly connected to the outside of the outer shell.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention uses terminals to fix the pins of the reed switch to the solder joints on the PCB board, ensuring that the pins are not squeezed by radial pressure. By leaving a gap between the heat shrink tubing and the PCB board, the reed switch is separated from the PCB board, preventing collisions that could cause the glass body of the reed switch to shatter during later use. By using adhesive to attach a magnet to the outside of the heat shrink tubing at the designated position on the reed switch, without direct contact, damage to the reed switch is avoided, thus protecting it. Attached Figure Description

[0016] Figure 1 A schematic diagram of the internal structure of the outer shell of this utility model is shown.

[0017] Figure 2 A cross-sectional structural diagram of the reed switch mounting position of this utility model is shown.

[0018] In the diagram: 1. PCB board; 2. Heat shrink tubing; 3. Terminal block; 4. Magnet; 5. Housing; 6. Retaining ring; 7. Plug; 8. Reed switch; 9. Silicone rubber layer; 10. Pin; 11. Sealant layer. Detailed Implementation

[0019] To address the problem that traditional installation methods easily lead to the glass body of the reed switch shattering during use, this invention provides a magnetic switch to prevent damage to the reed switch. The following description, in conjunction with specific embodiments and accompanying drawings, further illustrates this magnetic switch for preventing reed switch damage.

[0020] See Figures 1-2 As shown, a magnetic switch for preventing damage to a reed switch 8 includes a reed switch 8, a PCB board 1, a magnet 4, and a housing 5. The reed switch 8 is connected to pins 10, and the PCB board 1 has solder points corresponding to the pins 10. The magnetic switch also includes:

[0021] Heat shrink tubing 2 is wrapped around the glass body of reed switch 8;

[0022] Terminal 3 is used to fix pin 10 to the corresponding solder point on PCB board 1 so as to connect reed switch 8 to PCB board 1. A gap is left between heat shrink tubing 2 and PCB board 1.

[0023] Magnet 4 is attached and fixed to the outside of heat shrink tubing 2 at the set position of reed switch 8. The outer shell 5 covers PCB board 1, reed switch 8, heat shrink tubing 2, magnet 4 and terminal block 3.

[0024] Specifically, in this embodiment, terminal 3 is a screw terminal;

[0025] Furthermore, the number of pins 10 is three, and the number of terminals 3 and solder points is the same as the number of pins 10;

[0026] By using terminal block 3 to fix the pin 10 of reed switch 8 to the solder joint on PCB board 1, it can be ensured that the pin 10 will not be squeezed by external force due to radial pressure. By leaving a gap between heat shrink tubing 2 and PCB board 1, that is, separating reed switch 8 from PCB board 1, the gap range is 0.3-1.0mm. This prevents reed switch 8 from colliding with PCB board 1 during later use, which would cause the glass body of reed switch 8 to break. By using adhesive to attach magnet 4 to the outside of heat shrink tubing 2 at the set position of reed switch 8, without direct contact with reed switch 8, damage to reed switch 8 can be avoided, thus protecting reed switch 8.

[0027] Among them, see Figure 2 As shown, it also includes a silicone rubber layer 9, which wraps around the PCB board 1, heat shrink tubing 2, reed switch 8 and terminal block 3.

[0028] By adopting the above design, the PCB board 1, heat shrink tubing 2, reed switch 8 and terminal block 3 are wrapped with silicone rubber layer 9, which has a good buffering effect and helps to protect reed switch 8 and its pins 10.

[0029] Among them, see Figure 2 As shown, it also includes a sealant layer 11, which fills the space between the silicone rubber layer 9 and the outer shell 5.

[0030] Specifically, the sealant layer 11 can be an epoxy resin sealant;

[0031] Furthermore, the solder joints on PCB board 1 can be wrapped with an insulating film, which can be polyimide tape, to prevent corrosion of the solder joints.

[0032] By adopting the above design, the filled sealant layer 11 can directly fix the silicone rubber layer 9 and its internal structure inside the outer shell 5, and has the effects of waterproofing, dustproofing, insulation, anti-electricity, and resistance to high and low temperatures, which plays a certain role in protecting the circuit.

[0033] Among them, see Figure 1 As shown, a plug 7 is fixedly connected to the end of the outer casing 5, and the plug 7 is connected to the PCB board 1.

[0034] Specifically, the plug 7 is connected to the circuit on the PCB board 1 via a wire, and the part of the plug 7 that extends into the housing 5 is fixed together with the sealing layer 11.

[0035] The inner wall of the outer shell 5 is covered with a magnetic shielding layer (not shown in the figure).

[0036] By adopting the above design, the magnetic shielding plate can effectively resist the interference of external stray magnetic fields, making the reading accurate and stable, and improving the anti-interference capability of the magnetic switch.

[0037] Among them, see Figure 1 As shown, a retaining ring 6 for fixing the outer shell 5 is fixedly connected to the outside of the outer shell 5.

[0038] By adopting the above design, the fixed ring 6 facilitates the installation of the magnetic switch on the object during use and allows for fine-tuning of its position, greatly improving the applicability of the project.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A magnetic switch for preventing damage to a reed switch, comprising a reed switch, a PCB board, a magnet, and a housing, wherein the reed switch is connected to pins, and the PCB board has solder points corresponding to the pins, characterized in that, Also includes: Heat shrink tubing, which wraps around the glass body of a reed switch; The terminal block is used to fix the pin to the corresponding solder point on the PCB board to realize the connection between the reed switch and the PCB board, and a gap is left between the heat shrink tubing and the PCB board. The magnet is attached and fixed to the outside of the heat shrink tubing at the set position of the reed switch, and the outer shell covers the PCB board, reed switch, heat shrink tubing, magnet and wiring terminals.

2. The magnetic switch for preventing damage to the reed switch as described in claim 1, characterized in that, It also includes a silicone rubber layer, which wraps around the PCB board, heat shrink tubing, reed switch, and terminal block.

3. The magnetic switch for preventing damage to the reed switch as described in claim 2, characterized in that, It also includes a sealant layer that fills the space between the silicone rubber layer and the outer casing.

4. The magnetic switch for preventing damage to the reed switch as described in claim 1, characterized in that, A plug is fixedly connected to the end of the outer casing, and the plug is connected to the PCB board.

5. The magnetic switch for preventing damage to the reed switch as described in claim 1, characterized in that, The inner wall of the outer casing is covered with a magnetic shielding layer.

6. The magnetic switch for preventing damage to the reed switch as described in claim 1, characterized in that, The outer casing is fixedly connected to a retaining ring for securing the outer casing.

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