Method for controlling conduction of reed switch

Abstract

The invention discloses a method for controlling conduction of a reed switch, and belongs to the technical field of reed switches. Comprising the following steps: arranging a magnetic bar within a preset distance from a reed pipe, and arranging a coil around the outside of the reed pipe; the magnetic field intensity of the magnetic bar is set to be preset magnetic field intensity, and the preset magnetic field intensity is not enough to enable the two metal reeds of the reed pipe to be attracted together; when conduction control needs to be carried out on the reed switch, the coil is instantaneously electrified to generate an instantaneous magnetic field, so that the two metal reeds of the reed switch are attracted together, then the electrification of the coil is cut off, the two attracted metal reeds are continuously attracted together under the action of the magnetic bar, and at the moment, the coil is not electrified, and temperature drift cannot be caused. As the coil does not need to be continuously electrified, the coil does not generate heat, the temperature stability of surrounding devices is not influenced, and the stability of the circuit is further improved; and meanwhile, the power consumption of the circuit board is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of reed switches, and in particular to a method for controlling conduction of a reed switch. Background Art

[0002] The reed switch is an electric switch operated by a magnetic field. It is generally composed of two soft magnetic metal reeds and sealed in a vacuum glass tube. When there is an external magnetic field, the two reeds are magnetized into magnetic fields of different polarities. When the magnetic field strength is sufficient, the two reeds are attracted. When the magnetic field is far away, the reeds are demagnetized and the switch is disconnected. When disconnected, the reed switch has extremely high insulation resistance and is often used for channel switching of weak signals. At present, the conventional method of using the reed switch is to wind a coil around the outside of the reed switch, generate a magnetic field by energizing the coil, and further control the on and off of the reed switch. In order to make the reed switch conduct, the current passing through the external coil is large, and a large magnetic field is generated to close the reed switch. The coil will heat up, causing the components around the reed switch to heat up, further causing the temperature drift of the components to affect the output performance of the circuit. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for controlling the conduction of a reed switch.

[0004] The object of the present invention is achieved through the following technical solution: A method for controlling the conduction of a reed switch, used in a reed switch device, comprising the following steps: A magnetic bar is arranged within a preset distance from the reed switch, and a coil is arranged around the outside of the reed switch; The magnetic field strength of the magnetic bar is set to a preset magnetic field strength, wherein the preset magnetic field strength is insufficient to attract two metal reeds of the reed switch together; When the conduction control of the reed switch is required, the coil is energized instantaneously to generate an instantaneous magnetic field, so that the two metal reeds of the reed switch are attracted together, and then the power to the coil is disconnected. The two metal reeds that have been attracted continue to be attracted together under the action of the magnetic bar. At this time, the coil is not energized and will not cause temperature drift.

[0005] Preferably, the reed switch device includes a supporting plate, on which a hollow magnetic rod frame and a coil frame are arranged; a magnetic rod is installed in the hollow cavity of the magnetic rod frame; a reed switch is installed in the hollow cavity of the coil frame, and a coil is wound around the outside of the coil frame.

[0006] Preferably, the carrier board is a PCB board.

[0007] The beneficial effects of the present invention are: 1) The present invention uses the magnetic field of the magnetic bar as the main control signal. By instantaneously energizing, the coil generates an instantaneous magnetic field, completing the trigger signal for the two reeds of the reed switch to attract each other. Since the coil does not need to be continuously energized, the coil does not generate heat and will not affect the temperature stability of surrounding devices, further improving the stability of the circuit.

[0008] 2) It not only reduces the impact of the heating of the external coil of the reed switch on the performance of the circuit board, but also reduces the power consumption of the circuit board.

[0009] 3) The reed switch can be controlled and the coil does not need to be continuously energized, which avoids the influence of heat generated by the coil on components and improves the stability of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the reed switch assembly. DETAILED DESCRIPTION

[0011] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0012] See also Figure 1 The present invention provides a technical solution: a method for controlling the conduction of a reed switch, which is used in a reed switch device, comprising the following steps: A magnetic bar is arranged within a preset distance from the reed switch, and a coil is arranged around the outside of the reed switch; The magnetic field strength of the magnetic bar is set to a preset magnetic field strength, wherein the preset magnetic field strength is insufficient to attract two metal reeds of the reed switch together; When the conduction control of the reed switch is required, the coil is energized instantaneously to generate an instantaneous magnetic field, so that the two metal reeds of the reed switch are attracted together, and then the power to the coil is disconnected. The two metal reeds that have been attracted continue to be attracted together under the action of the magnetic bar. At this time, the coil is not energized and will not cause temperature drift.

[0013] In this embodiment, in order to reduce the impact of the heating of the external coil of the reed switch on the performance of the circuit board, a method for controlling the conduction of the reed switch is proposed, which can not only reduce the impact of the heating of the external coil of the reed switch on the performance of the circuit board, but also reduce the power consumption of the circuit board. The preset distance is a distance pre-set according to the actual working environment and working requirements, and is not limited to a specific distance. The specific value of the preset distance in the specific working scenario can be obtained through experiments or calculations using working environment parameters in a specific working scenario. The preset magnetic field strength is a magnetic field strength pre-set according to the actual working environment and working requirements, and is not limited to a specific magnetic field strength. The specific value of the preset magnetic field strength in the specific working scenario can be obtained through experiments or calculations using working environment parameters in a specific working scenario.

[0014] The working principle of controlling the reed switch in the present invention is as follows: the magnetic bar has a certain magnetic field strength, but the magnetic field strength is not enough to attract the two metal reeds of the reed switch together. When the reed switch needs to be turned on, the coil is instantly connected to attract the two metal reeds of the reed switch together. The attracted two metal reeds will continue to attract together under the action of the magnetic bar without the need to energize the coil. The coil will not generate heat due to energization, causing the surrounding devices to change due to temperature and produce temperature drift, thereby ensuring the stability of the circuit board.

[0015] In some embodiments, the reed switch device includes a supporting plate, on which a hollow magnetic rod frame and a coil frame are arranged; a magnetic rod is installed in the hollow cavity of the magnetic rod frame; a reed switch is installed in the hollow cavity of the coil frame, and a coil is wound around the outside of the coil frame.

[0016] In this embodiment, the reed switch is installed in a frame around which a coil is wound, a magnetic rod frame is fixed next to the coil frame, and a magnetic rod is installed inside the magnetic rod frame.

[0017] In some embodiments, the carrier board is a PCB board.

[0018] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A method for controlling the conduction of a reed switch, characterized in that: For a reed switch device, the steps include: A magnetic bar is arranged within a preset distance from the reed switch, and a coil is arranged around the outside of the reed switch; The magnetic field strength of the magnetic bar is set to a preset magnetic field strength, wherein the preset magnetic field strength is insufficient to attract two metal reeds of the reed switch together; When the conduction control of the reed switch is required, the coil is energized instantaneously to generate an instantaneous magnetic field, so that the two metal reeds of the reed switch are attracted together, and then the power to the coil is disconnected. The two metal reeds that have been attracted continue to be attracted together under the action of the magnetic bar. At this time, the coil is not energized and will not cause temperature drift.

2. The method for controlling the conduction of a reed switch according to claim 1, characterized in that: The reed switch device comprises a supporting plate, on which a hollow magnetic rod frame and a coil frame are arranged; a magnetic rod is installed in the hollow cavity of the magnetic rod frame; a reed switch is installed in the hollow cavity of the coil frame, and a coil is wound around the outside of the coil frame.

3. The method for controlling the conduction of a reed switch according to claim 2, characterized in that: The carrier board is a PCB board.

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