A high-reliability switchable auxiliary assembly for enabling normally open or normally closed signal feedback

Abstract

The utility model discloses a kind of high reliability auxiliary assembly of switchable realization normally open or normally closed signal feedback, including ceramic cover, circuit board, microswitch and movable support, the middle of ceramic cover inner wall is equipped with boss, the height of the boss is matched with the thickness of circuit board;The whole of circuit board and microswitch is placed on boss after welding and fixed;Two symmetrical extension bars are respectively equipped in the side of movable support, and the extension bar is integrally formed with movable support;Circuit board and auxiliary joint are welded and fixed;The extension bar of the contact of the extension bar of movable support and the extension bar of movable support is kept with movable support's extension bar;The section of the extension bar is arc, and the amplitude is matched with the movement track of microswitch paddle.

Description

Technical Field

[0001] This utility model belongs to the field of high voltage DC contactor technology, and more specifically, it relates to a highly reliable auxiliary component that can switch between normally open and normally closed signal feedback. Background Technology

[0002] A DC contactor is a type of contactor used in DC circuits, primarily to control the conduction of DC circuits (main circuits, control circuits, and excitation circuits, etc.).

[0003] An auxiliary signal element in a DC contactor, often referred to in the market as an auxiliary contact, auxiliary contact piece, or auxiliary switch, is a moving part in the DC contactor that moves upward together with the moving contact. When the moving contact piece is connected to the stationary contact (i.e., the main circuit is connected), the movable bracket contacts the micro switch lever, causing the micro switch to conduct. The micro switch signal is then connected to the auxiliary connector to provide feedback that the main circuit of the DC contactor is conducting.

[0004] Currently, the auxiliary contact installation structure on the market is quite complex. It uses various metal and plastic parts, connected to the support base via riveting and inserts. The auxiliary spring is mounted on an insulating base, which separates the moving contact from the moving spring. This makes component assembly cumbersome. The auxiliary spring is made of beryllium copper, which has good short-term bending resilience, but there is a risk of breakage after prolonged mechanical action. During rapid action, there is a risk of delayed rebound and false alarms. The reliability and stability of the auxiliary signal are relatively low. It is typically used for normally open auxiliary signals; normally closed auxiliary signals are difficult to implement. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a highly reliable auxiliary component that can switch between normally open and normally closed signal feedback, thereby solving the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a highly reliable auxiliary component capable of switching between normally open and normally closed signal feedback, comprising a ceramic cover, a circuit board, a micro switch, and a movable bracket. A boss is provided in the middle of the inner wall of the ceramic cover, the height of which matches the thickness of the circuit board. The circuit board is welded and fixed to the micro switch and then placed integrally on the boss. Two symmetrical extension ribs are provided on each side of the movable bracket, and these extension ribs are integrally formed with the movable bracket. The circuit board is welded and fixed to an auxiliary connector. The lever of the micro switch maintains contact with the extension ribs of the movable bracket. The cross-section of the extension ribs is arc-shaped, and its curvature matches the movement trajectory of the micro switch lever.

[0007] Preferably, the circuit board is provided with circuits arranged according to normally open and normally closed requirements, and the circuits use copper foil lines with a line width of 0.5-1.2mm.

[0008] Preferably, the micro switch has a dual-contact structure, including normally open contacts and normally closed contacts, and the contact material is a silver alloy.

[0009] Preferably, the boss of the ceramic cover is a rectangular platform, the size of which is 1-2mm smaller than the perimeter of the circuit board.

[0010] Preferably, the ceramic cover is made of 95% alumina ceramic material and has a wall thickness of 2.5-3.5 mm.

[0011] This invention provides a highly reliable auxiliary component that can switch between normally open and normally closed signal feedback, and has the following advantages: 1. The symmetrical extension rib structure on both sides of the movable bracket ensures that the micro switch can reliably contact and operate in any installation position, which greatly improves the structural stability and operational reliability of the component.

[0012] 2. The extension ribs and movable supports are made in one piece, which avoids the risk of loosening caused by the assembly of multiple parts in traditional structures, and significantly improves the overall structural strength and durability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a front structural cross-sectional view of the present invention.

[0015] Figure 3 This is a cross-sectional view of the internal structure of this utility model.

[0016] In the diagram, 1 is the ceramic cover; 2 is the circuit board; 3 is the micro switch; 4 is the movable bracket; 5 is the auxiliary connector; and 6 is the boss. Detailed Implementation

[0017] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0018] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Please see Figures 1 to 3 This utility model provides a technical solution: a highly reliable auxiliary component that can switch between normally open and normally closed signal feedback, including a ceramic cover 1, a circuit board 2, a micro switch 3, and a movable bracket 4.

[0021] A boss 6 is provided in the middle of the inner wall of the ceramic cover 1, and the height of the boss 6 matches the thickness of the circuit board 2. The boss 6 of the ceramic cover 1 is a rectangular platform, and its size is 1-2mm smaller than the perimeter of the circuit board 2. The ceramic cover 1 is made of 95% alumina ceramic material and has a wall thickness of 2.5-3.5mm.

[0022] After the circuit board 2 and the micro switch 3 are soldered and fixed, the whole assembly is placed on the boss 6. The circuit board 2 is provided with circuits arranged according to the requirements of normally open and normally closed circuits. The circuits use copper foil circuits with a line width of 0.5-1.2mm.

[0023] The movable support 4 has two symmetrical extension ribs on each side, and the extension ribs are integrally formed with the movable support 4.

[0024] Circuit board 2 is welded and fixed to auxiliary connector 5. The lever of micro switch 3 is in contact with the extension rib of movable bracket 4. The cross-section of the extension rib is arc-shaped, and its curvature matches the movement trajectory of the lever of micro switch 3. Micro switch 3 has a double contact structure, including normally open contact and normally closed contact, and the contact material is silver alloy.

[0025] The specific usage and function of this embodiment: This patent features two symmetrical extension ribs on each side of the movable bracket 4. When the contactor engages and disengages, the movable bracket 4 moves up and down, pushing the micro switch 3 via the side ribs of the movable bracket 4 to complete the connection and disconnection of the auxiliary signal. The micro switch 3 is highly sensitive and responds quickly to the control signals of the high-voltage DC contactor, accurately controlling the on / off state of the auxiliary contacts. It has a long service life and good durability, maintaining stable performance during long-term use and ensuring stable switching of the auxiliary contacts.

[0026] A small protrusion 6 is opened in the middle of the inner wall of the ceramic cover 1. The circuit board 2 and the micro switch 3 are soldered and placed on the protrusion 6. The circuit board 2 is soldered and fixed to the auxiliary connector 5. The micro switch 3 is soldered to the circuit board 2. Wiring is carried out on the circuit board 2 according to the different requirements of normally open and normally closed.

[0027] Two symmetrical extension ribs are stretched on both sides of the movable bracket 4 to ensure that the micro switch 3 can reliably contact and operate regardless of the position when it is installed inside the ceramic cover 1.

[0028] The workflow under the always-on configuration is as follows: 1. Under normal conditions, the normally open contact 3 of the micro switch is open; 2. When the main circuit is energized, the movable bracket 4 moves upward by 3mm; 3. The extension rib pushes the micro switch's third lever to close the normally open contact; 4. The signal is transmitted to the auxiliary connector 5 through circuit board 2.

[0029] Workflow under normally closed configuration: 1. Under normal conditions, the normally closed contact 3 of the micro switch is closed; 2. When the main circuit is energized, the movable bracket 4 moves upward by 3mm; 3. The extension rib pushes the micro switch's third lever to disconnect the normally closed contact; 4. Signal status changes are transmitted through circuit board 2.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A highly reliable auxiliary component for switchable normally open or normally closed signal feedback, comprising a ceramic cover (1), a circuit board (2), a micro switch (3), and a movable bracket (4), characterized in that: The ceramic cover (1) has a boss (6) in the middle of its inner wall. The height of the boss (6) matches the thickness of the circuit board (2). The circuit board (2) and the micro switch (3) are welded and fixed together and placed on the boss (6). The movable bracket (4) has two symmetrical extension ribs on both sides. The extension ribs are integrally formed with the movable bracket (4). The circuit board (2) is welded and fixed with the auxiliary connector (5). The lever of the micro switch (3) is in contact with the extension rib of the movable bracket (4). The cross section of the extension rib is arc-shaped and its curvature matches the movement trajectory of the lever of the micro switch (3).

2. The auxiliary component for high reliability and switchable normally open or normally closed signal feedback according to claim 1, characterized in that: The circuit board (2) is provided with circuits arranged according to normally open and normally closed requirements. The circuits use copper foil lines with a line width of 0.5-1.2mm.

3. The auxiliary component for high reliability and switchable normally open or normally closed signal feedback according to claim 1, characterized in that: The micro switch (3) has a dual-contact structure, including normally open contacts and normally closed contacts, and the contact material is silver alloy.

4. The high-reliability switchable auxiliary component for normally open or normally closed signal feedback according to claim 1, characterized in that: The boss (6) of the ceramic cover (1) is a rectangular platform, and its size is 1-2 mm smaller than the perimeter of the circuit board (2).

5. The auxiliary component for high reliability and switchable normally open or normally closed signal feedback according to claim 1, characterized in that: The ceramic cover (1) is made of 95% alumina ceramic material and has a wall thickness of 2.5-3.5 mm.

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