Electromagnetic shielding magnetic control type electric control switch

Abstract

The utility model provides an electromagnetic shielding magnetic control type electric control switch, which belongs to the technical field of switches, and comprises a shell, a coil framework is arranged in the shell, a coil is wound on the coil framework, a mounting channel is arranged on the coil framework along the axial direction of the coil, at least two reed pipes are uniformly arranged in the mounting channel along the circumferential direction, and the reed pipes are arranged in the shell. The coil comprises a power connection end, the reed switch has a connection state and a disconnection state and achieves state switching under the action of a coil magnetic field, and an electromagnetic shielding cover is arranged between the shell and the coil framework. According to the utility model, the influence of external magnetic interference on the magnetic field of the coil is isolated through the electromagnetic shielding cover, so that the working stability and reliability of the reed switch are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to an electromagnetically shielded magnetically controlled electric switch. Background Art

[0002] Electronic switches are used to control the opening and closing of high-power or high-voltage circuits. They are often used in situations that require remote control or automated control, such as home automation, industrial control systems, power systems, and communication equipment. With the development of electronic technology, electronic switches play an increasingly important role in achieving more intelligent and automated circuit designs. At the same time, future electronic switches will develop in the direction of being smaller, more economical, and more intelligent.

[0003] The electromagnetic electric switch is a commonly used electric switch, which is usually used in automated control circuits. It generally includes a shell and an electromagnetic mechanism and contacts arranged in the shell. The conventional shell has poor electromagnetic shielding effect, especially when used in some environments with strong magnetic interference, it is easy to cause the stability and reliability of the internal electromagnetic mechanism to decrease. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide an electromagnetically shielded magnetically controlled electric switch.

[0005] The technical solution adopted by the utility model is as follows: an electromagnetically shielded magnetically controlled electric switch, comprising a shell, a coil frame is arranged in the shell, a coil is wound on the coil frame, and an installation channel is arranged on the coil along the axial direction of the coil, at least two reed switches are evenly arranged circumferentially in the installation channel, the coil includes an electrical connection terminal, the reed switch has a connected state and a disconnected state, and it realizes state switching under the action of the coil magnetic field, and an electromagnetic shielding cover is arranged between the shell and the coil frame.

[0006] It is further configured that the electromagnetic shielding cover is made of metal material or conductive plastic.

[0007] It is further configured that the electromagnetic shielding cover is a conductive paint layer arranged on the inner wall of the shell, or is a metal foil or metal braided fabric arranged on the inner wall of the shell.

[0008] It is further configured that a circuit frame made of a PCB board is arranged outside the coil skeleton, and a connecting circuit is printed on it, the reed switch includes a reed, and the reed and the power terminal are both connected to the circuit frame, and the electromagnetic shielding cover is arranged between the shell and the circuit frame.

[0009] It is further configured that gaps are provided between the electromagnetic shielding cover and the shell, and between the electromagnetic shielding cover and the circuit frame.

[0010] It is further configured that the circuit frame extends downward to have connecting ends corresponding one to one with the spring sheets and the power connection ends, and the connecting ends are plug-in contacts.

[0011] It is further configured that a mounting hole is provided at the bottom of the shell, the plug-in contact includes an upper contact portion, a limiting contact portion and a lower contact portion, the upper contact portion is connected to the bottom plate of the circuit frame, and the limiting contact portion abuts between the bottom plate of the circuit frame and the bottom of the shell.

[0012] It is further configured that a plurality of clamping protrusions are arranged on both sides of the lower contact piece portion along the length direction, and the clamping protrusions are provided with inclined surfaces, and the inclined surfaces on both sides are contracted toward the end of the lower contact piece portion.

[0013] It is further configured that the lower portion of the lower contact portion extends out of the mounting hole, and a guide portion is provided at the end thereof, and a through hole is provided above the guide portion.

[0014] It is further configured that the parts on both sides of the lower contact piece portion where the clamping protrusions are provided are provided with fixing protrusions, and the fixing protrusions are in the shape of a triangular pyramid.

[0015] The beneficial effects of the utility model are as follows: In the utility model, the electromagnetic shielding cover is used to isolate the influence of external magnetic interference on the coil magnetic field, thereby ensuring the stability and reliability of the reed switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0017] Figure 1 It is an exploded view of the utility model;

[0018] Figure 2 It is a schematic diagram of some structures in the utility model Figure 1 ;

[0019] Figure 3 It is a cross-sectional view of the utility model;

[0020] Figure 4 It is a schematic diagram of some structures in the utility model Figure 2 ;

[0021] Figure 5 It is a schematic diagram of the plug-in contact piece in the utility model. DETAILED DESCRIPTION

[0022] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0023] In the description of the present application, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "plurality" means two or more.

[0024] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] In the description of this application, it should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0026] Embodiment 1:

[0027] like Figures 1 to 5 As shown, an electromagnetically shielded magnetically controlled electric switch includes a shell 1, a coil skeleton 2 is arranged in the shell 1, a coil 3 is wound on the coil skeleton 2, and an installation channel 21 is arranged on the coil skeleton along the axial direction of the coil 3, at least two reed switches 4 are evenly arranged in the circumferential direction of the installation channel 21. In this embodiment, four reed switches 4 are evenly arranged in the circumferential direction of the installation channel 21, which can control four circuits at the same time. The reed switches 4 are evenly distributed to ensure the consistency of the action of each reed switch 4, which also helps to reduce the influence of electromagnetic interference and improve electromagnetic compatibility.

[0028] The coil 3 includes a power connection terminal, the reed switch 4 has a connected state and a disconnected state, and it realizes state switching under the action of the magnetic field of the coil 3. The traditional reed switch 4 has a normally open type, a normally closed type and a conversion type. In this embodiment, the reed 41 includes a normally open contact, a normally closed contact and a common end contact.

[0029] An electromagnetic shielding cover 5 is provided between the housing 1 and the coil frame 2, and the electromagnetic shielding cover 5 isolates the influence of external magnetic interference on the coil magnetic field, thereby ensuring the stability and reliability of the reed switch.

[0030] Through the above arrangement, a new structure of electric control switch is realized to replace the electromagnetic relay of transmission, which is particularly suitable for the control of multi-channel circuits. It can not only greatly reduce the overall volume of the product and reduce the cost of the product, but also has the characteristics of simple structure, fast switching speed and long electrical life of contacts.

[0031] The electromagnetic shielding cover 5 can be a separate cover body. Specifically, the electromagnetic shielding cover 5 is made of metal material, such as copper, aluminum, steel, etc., or made of conductive plastic, that is, plastic with conductive fillers such as carbon fiber, carbon black or metal powder added, which is light and easy to shape.

[0032] The electromagnetic shielding cover 5 can be set as a whole with the shell 1. Specifically, the electromagnetic shielding cover 5 is a conductive paint layer arranged on the inner wall of the shell 1. For example, a metal layer such as silver or nickel is applied to a non-conductive substrate by electroplating or spraying to enhance the shielding property, or it is a metal foil or metal braid arranged on the inner wall of the shell 1.

[0033] Furthermore, the housing 1 may also be like the electromagnetic shielding cover 5, so that double electromagnetic shielding can be formed.

[0034] Furthermore, a circuit frame 6 made of a PCB board is provided outside the coil skeleton 2, and connected circuits are printed on it. The circuit frame 6 can be composed of multiple PCB boards. The reed switch 4 includes a reed 41, and the reed 41 and the power terminal are both connected to the circuit frame 6. The electromagnetic shielding cover 5 is arranged between the shell 1 and the circuit frame 6. By printing connected circuits on the circuit frame 6 to replace the traditional wiring method, the internal wiring of the product can be omitted, which is conducive to the miniaturization of the relay, and it is more convenient to install functional modules on the circuit frame 6, which is conducive to the realization of diversified product functions.

[0035] Furthermore, a gap 8 is provided between the electromagnetic shielding cover 5 and the housing 1 and between the electromagnetic shielding cover 5 and the circuit frame 6, which can further isolate electromagnetic interference and prevent the propagation of electromagnetic noise. At the same time, the gap can also serve as a channel for heat dissipation, which helps to disperse the heat inside the product and prevent overheating. Secondly, a certain fault tolerance space can be provided for the installation of the electromagnetic shielding cover 5.

[0036] Furthermore, the circuit frame 6 extends downward to have a connection terminal 7 corresponding to the spring 41 and the power connection terminal. The connection terminal 7 is a plug-in contact. The connection terminal 9 is uniformly led out on one side through the circuit frame 6, which is more convenient for external connection.

[0037] Furthermore, a mounting hole 101 is provided at the bottom of the shell 1, and the plug contact includes an upper contact portion 71, a limiting contact portion 72 and a lower contact portion 73, the upper contact portion 71 is connected to the bottom plate of the circuit frame 6, and the limiting contact portion 72 abuts between the bottom plate of the circuit frame 6 and the bottom of the shell 1. In this embodiment, the shell 1 includes an upper shell and a base.

[0038] Through the above arrangement, a hot air flow space can be formed between the bottom plate of the circuit frame 6 and the base, which is helpful for heat dissipation inside the switch.

[0039] Furthermore, a plurality of snap-fitting protrusions 731 are provided on both sides of the lower contact portion 73 along the length direction, and an inclined surface 732 is provided on the snap-fitting protrusion 731. The inclined surfaces 732 on both sides are contracted toward the end of the lower contact portion 73, so that a barb-like structure is formed on both sides of the lower contact portion 73, so that the connection between the connecting end 7 and the base is more firmly and reliably connected, and the plug-in contact piece is prevented from loosening relative to the mounting hole 101 when the plug-in contact piece is plugged into other devices.

[0040] Furthermore, the lower portion of the lower contact portion 73 extends out of the mounting hole 101, and a guide portion 733 is provided at its end, which makes plugging and connecting with a corresponding device smoother. A through hole 734 is provided above the guide portion 733 to provide heat dissipation space when the contacts are electrically connected.

[0041] Furthermore, the portion on both sides of the lower contact portion 73 where the snap-fit ​​protrusions 731 are provided are provided with fixing protrusions 735, and the fixing protrusions 735 are in the shape of a triangular pyramid. The fixing protrusions 735 are inserted into the mounting hole 101, and the fixing protrusions 735 can be fixed with the mounting hole 101, thereby forming a double fixation in cooperation with the snap-fit ​​protrusions 731.

[0042] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. An electromagnetically shielded magnetically controlled electric switch, comprising a housing (1), characterized in that: A coil frame (2) is arranged in the shell (1), a coil (3) is wound on the coil frame (2), and a mounting channel (21) is arranged on the coil frame along the axial direction of the coil (3), at least two reed switches (4) are evenly arranged in the circumferential direction in the mounting channel (21), the coil (3) includes an electrical connection terminal, the reed switch (4) has a connected state and a disconnected state, and the state is switched under the action of the magnetic field of the coil (3), and an electromagnetic shielding cover (5) is arranged between the shell (1) and the coil frame (2).

2. The electromagnetically shielded magnetically controlled electric switch according to claim 1, characterized in that: The electromagnetic shielding cover (5) is made of metal material or conductive plastic.

3. The electromagnetically shielded magnetically controlled electric switch according to claim 1, characterized in that: The electromagnetic shielding cover (5) is a conductive paint layer arranged on the inner wall of the shell (1), or is a metal foil or metal braided fabric arranged on the inner wall of the shell (1).

4. The electromagnetically shielded magnetically controlled electric switch according to claim 1, characterized in that: A circuit frame (6) made of a PCB board is arranged outside the coil skeleton (2) and has connected circuits printed thereon. The reed switch (4) includes a reed leaf (41), and the reed leaf (41) and the power connection end are both connected to the circuit frame (6). The electromagnetic shielding cover (5) is arranged between the housing (1) and the circuit frame (6).

5. The electromagnetically shielded magnetically controlled electric switch according to claim 4, characterized in that: Gaps (8) are provided between the electromagnetic shielding cover (5) and the housing (1), and between the electromagnetic shielding cover (5) and the circuit frame (6).

6. The electromagnetically shielded magnetically controlled electric switch according to claim 4, characterized in that: The circuit frame (6) extends downward to have a connecting end (7) corresponding one-to-one with the spring sheet (41) and the power connection end, and the connecting end (7) adopts a plug-in contact sheet.

7. The electromagnetically shielded magnetically controlled electric switch according to claim 6, characterized in that: The bottom of the housing (1) is provided with a mounting hole (101); the plug-in contact comprises an upper contact portion (71), a limiting contact portion (72) and a lower contact portion (73); the upper contact portion (71) is connected to the bottom plate of the circuit frame (6); the limiting contact portion (72) abuts between the bottom plate of the circuit frame (6) and the bottom of the housing (1).

8. The electromagnetically shielded magnetically controlled electric switch according to claim 7, characterized in that: A plurality of clamping protrusions (731) are arranged on both sides of the lower contact piece (73) along the length direction, and an inclined surface (732) is arranged on the clamping protrusion (731), and the inclined surfaces (732) on both sides are contracted toward the end of the lower contact piece (73).

9. The electromagnetically shielded magnetically controlled electric switch according to claim 7, characterized in that: The lower part of the lower contact piece (73) extends out of the mounting hole (101), and a guide part (733) is provided at the end thereof, and a through hole (734) is provided above the guide part (733).

10. The electromagnetically shielded magnetically controlled electric switch according to claim 8, characterized in that: Parts of the lower contact piece (73) on both sides of which the clamping protrusions (731) are provided with fixing protrusions (735), and the fixing protrusions (735) are in the shape of a triangular pyramid.

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