mechanical switch

Abstract

The mechanical switch comprises a moving contact assembly, the moving contact assembly comprises at least one insulating base located at two ends of the moving contact in a first direction, at least one first elastic piece and at least one connecting rod, the at least one insulating base is connected to one end of the moving contact in the first direction, the at least one first elastic piece and the at least one connecting rod are connected between the insulating base and a switch housing, one side of the insulating base is provided with a connecting groove, a first mounting shaft is arranged in the connecting groove, two opposite sliding guide portions are arranged on both sides of the connecting groove, the first mounting shaft is mounted in the connecting groove and connected to the two sliding guide portions at both ends, and a connecting section of one end of the at least one first elastic piece and the at least one connecting rod is rotationally mounted on the first mounting shaft; the length direction of the sliding guide portion is the same as the first direction; when the moving contact assembly moves between a closed position and an open position, the first mounting shaft slides along the length direction of the sliding guide portion, the direction of the acting force is adjusted, the number of parts is small, the volume is small, the thickness is thin, and the opening speed is faster.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a mechanical switch. Background Technology

[0002] Hybrid solid-state circuit breakers were developed to address the issues of high losses, the need for cooling devices, and high costs associated with pure solid-state circuit breakers. Hybrid solid-state circuit breakers integrate mechanical switches and power semiconductors, achieving not only the low conduction losses of mechanical switches but also the rapid actuation advantages of power semiconductors. A hybrid solid-state circuit breaker consists of mechanical switches and power semiconductors connected in parallel. When the circuit breaker closes, the power semiconductor connects first, followed by the mechanical switch. When a fault current is encountered, the mechanical switch opens first, followed by the power semiconductor. Zero arcing occurs during the opening and closing of the mechanical switch. Therefore, the opening time of the mechanical switch directly affects the size and cost of the power semiconductor.

[0003] Existing mechanical switches have many parts, are large in size and thickness, and have a large distance between the coil and the moving contact, resulting in slow opening action of the mechanical switch. Utility Model Content

[0004] The purpose of this utility model is to overcome at least one defect of the prior art and provide a mechanical switch with a simple structure, few parts, small size, thin thickness, and faster opening speed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This application provides a mechanical switch, including a switch housing, and at least one moving contact assembly, at least two stationary contacts, a tripping coil, and a closing coil disposed within the switch housing. The moving contact assembly includes a moving contact with moving points at both ends corresponding to the two stationary contacts. Each stationary contact has a corresponding stationary contact. The line connecting the two moving points at both ends of the moving contact is located in a first direction. The moving contact assembly is linearly movable between a closed position and an open position along a second direction. The tripping coil and the closing coil are located on opposite sides of the moving contact along the second direction. The tripping coil and the two stationary contacts are all located on the same side of the moving contact along the second direction, and the tripping coil is located between the two stationary contacts along the first direction.

[0007] At least one insulating seat, at least one first elastic element, and at least one connecting rod are provided at both ends of the moving contact in the first direction. The insulating seat is fixedly connected to the moving contact and is provided with a connecting groove. Sliding guide portions are provided on opposite sides of the connecting groove. A first mounting shaft is installed in the connecting groove and its two ends are slidably connected to the sliding guide portions. One end of the first elastic element and the connecting rod are rotatably mounted on the first mounting shaft, and the other end is rotatably connected to the switch housing. When the moving contact assembly moves between the closed position and the open position, the first mounting shaft slides along its length.

[0008] When the moving contact assembly is in the closed position, the moving contact is in contact with the two stationary contacts, and the connecting rod and the first elastic element work together on the first mounting shaft to provide a closing holding force to the moving contact; when the moving contact assembly is in the open position, the moving contact is separated from the two stationary contacts, and the connecting rod and the first elastic element work together on the first mounting shaft to provide an opening holding force to the moving contact.

[0009] In one possible implementation, the switch housing includes at least one second mounting shaft mounting base and at least one third mounting shaft mounting base, with the other end of the connecting rod rotatably mounted on the second mounting shaft mounting base, and the other end of the first elastic element rotatably mounted on the third mounting shaft mounting base.

[0010] The distance between the third mounting shaft mounting base and the insulating base is greater than the distance between the corresponding second mounting shaft mounting base and the insulating base. During the movement of the moving contact assembly along the second direction, an angle is formed between the axis of the first elastic element and the length direction of the connecting rod.

[0011] In one possible implementation, the insulating seat has a moving contact mounting groove on the side facing away from the connecting groove, and a first notch is provided on the side of the insulating seat facing the stationary contact. The moving contact has moving points at both ends that correspond to the two stationary contacts respectively. One end of the moving contact is inserted into the moving contact mounting groove, and the moving contact is located in the first notch.

[0012] In one possible implementation, the switch housing further includes at least one second mounting shaft and at least one third mounting shaft, the at least one second mounting shaft being correspondingly mounted on at least one second mounting shaft mounting base, the at least one third mounting shaft being correspondingly mounted on at least one third mounting shaft mounting base, the two ends of at least one connecting rod being rotatably mounted on the first mounting shaft and at least one second mounting shaft, and the two ends of at least one first elastic member being rotatably mounted on the first mounting shaft and at least one third mounting shaft, respectively.

[0013] In one possible implementation, the sliding guide includes a waist-shaped hole or a waist-shaped groove, and the two ends of the connecting rod include a second through hole and a third through hole, respectively. The two ends of the first mounting shaft pass through the second through hole of at least one connecting rod and are inserted into the two waist-shaped holes or waist-shaped grooves on the insulating seat; the two ends of at least one second mounting shaft pass through the third through hole of at least one connecting rod respectively.

[0014] In one possible implementation, the switch housing includes an upper housing and a lower housing, with at least two stationary contacts and the opening coil located in the upper housing, the closing coil located in the lower housing, and the moving contact assembly movably disposed between the upper housing and the lower housing.

[0015] In one possible implementation, at least one raised second mounting shaft mounting base and at least one raised third mounting shaft mounting base are located on the upper housing, and the lower housing includes at least one mounting base clearance groove for accommodating at least one second mounting shaft mounting base and at least one third mounting shaft mounting base; alternatively, at least one raised second mounting shaft mounting base and at least one raised third mounting shaft mounting base are located on the lower housing, and the upper housing includes at least one mounting base clearance groove for accommodating at least one second mounting shaft mounting base and at least one third mounting shaft mounting base.

[0016] At least one second mounting shaft is correspondingly mounted on at least one second mounting shaft mounting base, and at least one third mounting shaft is correspondingly mounted on at least one third mounting shaft mounting base. The upper housing and the lower housing are stacked and installed so that at least one second mounting shaft mounting base and at least one third mounting shaft mounting base are correspondingly mounted in at least one mounting base clearance groove, thereby limiting the movement of at least one second mounting shaft and at least one third mounting shaft.

[0017] In one possible implementation, there is a balanced position between the closed position and the open position, and when the moving contact assembly moves to the balanced position, the force exerted by the first elastic element and the connecting rod on the moving contact assembly is perpendicular to the second direction.

[0018] The distance between the balanced position and the closed position of the moving contact assembly is less than or equal to the distance between the balanced position and the open position of the moving contact assembly.

[0019] In one possible implementation, the distance between the balanced position and the closed position of the moving contact assembly is H1, and the distance between the balanced position and the open position of the moving contact assembly is H2, where 1 / 3 ≤ H1 / H2 ≤ 1.

[0020] In one possible implementation, the upper housing is provided with a trip coil mounting slot, in which the trip coil is installed; the lower housing is provided with a closing coil mounting slot, in which the closing coil is installed; the upper housing is also provided with a stationary contact mounting slot, in which at least two stationary contacts are installed; the upper housing and / or the lower housing includes a moving contact assembly clearance slot.

[0021] In one possible implementation, the moving contact includes contact portions located at both ends in a first direction, and a driving portion located between the two contact portions. The two moving contacts are respectively located at the two contact portions. The driving portion protrudes along both sides of a third direction to form arc-shaped protrusions. The third direction is perpendicular to the first direction and the second direction, respectively. The driving portion and the arc-shaped protrusions on both sides form a repulsion zone, which is correspondingly arranged with the opening coil and the closing coil.

[0022] In one possible implementation, when the moving contact assembly is in the closed position, there is a first protective gap between the opening coil and the moving contact, and when the moving contact assembly is in the open position, there is a second protective gap between the closing coil and the moving contact.

[0023] In one possible implementation, the switch housing is provided with a second elastic element to buffer the impact force when the moving contact opens.

[0024] In one possible implementation, the first elastic element is a tension spring; when the moving contact assembly is in the closed position, the first elastic element applies a tension force F1 along the axis of the first elastic element to the first mounting shaft. The tension force F1 causes the first mounting shaft to generate a component force F2 along the length direction of the connecting rod. The connecting rod generates a reaction force F3 along its length direction on the first mounting shaft. The vector sum of F3 and F1 is F4. The F4 generates an upward component force on the moving contact, keeping the moving contact in the closed holding state.

[0025] When the moving contact assembly is in the open position, the first elastic element applies a tensile force F5 along the axis of the first elastic element to the first mounting shaft. The tensile force F5 causes the first mounting shaft to generate a component force F6 along the first direction on the connecting rod. The connecting rod generates a reaction force F7 along the length direction on the first mounting shaft. The vector sum of F7 and F5 is F8. The F8 generates a downward component force on the moving contact, so that the moving contact is in the open holding state.

[0026] Compared to existing technologies, the mechanical switch of this application includes a moving contact assembly comprising at least one insulating seat, at least one first elastic element, and at least one connecting rod located at both ends of the moving contact along a first direction. The at least one insulating seat is connected to one end of the moving contact in the first direction. The at least one first elastic element and the at least one connecting rod are connected between the insulating seat and the switch housing. A connecting groove is provided on one side of the insulating seat, and a first mounting shaft is provided within the connecting groove. Two opposing sliding guide portions are provided on both sides of the connecting groove.

[0027] The first mounting shaft is installed in the connecting groove, and its two ends are connected to two sliding guides. At least one of the first elastic elements and at least one connecting section at one end of the connecting rod are rotatably mounted on the first mounting shaft. The length direction of the sliding guide is the same as the first direction. When the moving contact assembly moves between the closed position and the open position, the first mounting shaft slides along the length direction of the sliding guide to adjust the direction of the force.

[0028] When the repulsive force of the opening or closing coil drives the moving contact to move, the first elastic element and the connecting rod drive the moving contact and the stationary contact to quickly contact or disconnect, and provide opening and closing holding forces. The repulsive disk is no longer required. At the same time, the connecting rod can guide the moving contact, eliminating the need for a separate guiding element. There are no other components between the opening coil and the moving contact, or between the closing coil and the moving contact, reducing the number of parts, decreasing the overall thickness of the mechanical switch, making the structure simpler and more stable, reducing the distance between the moving contact and the coil, and increasing the opening speed, thereby improving the transmission efficiency of the mechanical switch.

[0029] Furthermore, the distance between the third mounting shaft mounting base and the insulating base is greater than the distance between the second mounting shaft mounting base and the insulating base. During the movement of the moving contact assembly along the second direction, an angle is formed between the first elastic element and the connecting rod, creating an angle between the direction of the reaction force of the connecting rod on the moving contact and the direction of the pulling force of the first elastic element on the moving contact, thereby generating an upward or downward component force on the moving contact.

[0030] In addition, when closing the circuit, the first notch of the insulating base allows the moving contact to reliably contact the stationary contact, ensuring a stable circuit connection. When opening the circuit, the insulating base contacts the switch housing, preventing the moving contact assembly from directly contacting the closing coil and impacting the closing coil, which would affect the service life of the mechanical switch. Moreover, the insulating base facilitates the indirect connection between the second elastic element and the moving contact, which can reduce the wear on the moving contact during the opening and closing process to a certain extent.

[0031] Furthermore, the distance between the equilibrium position and the closed position of the moving contact assembly is less than or equal to the distance between the equilibrium position and the open position of the moving contact assembly, which helps to speed up the opening process. The specific distance difference between the two can be set according to the product specifications, but it is necessary to ensure that the closing holding force of the moving contact assembly in the closed position is sufficient for the moving and stationary contacts to make full contact.

[0032] Furthermore, the moving contact includes contact portions located at both ends in the first direction, and a driving portion located between the two contact portions. The two moving contacts are respectively located at the two contact portions. The driving portion protrudes along both sides of the third direction to form arc-shaped protrusions. The third direction is perpendicular to the first direction and the second direction, respectively. The driving portion and the arc-shaped protrusions on both sides form a repulsion zone, which is correspondingly arranged with the opening coil and the closing coil, which is beneficial to the eddy current generated at the moving contact when the opening coil and the closing coil are energized. Attached Figure Description

[0033] Figure 1 This is an exploded view of the mechanical switch of this utility model;

[0034] Figure 2 This is a schematic diagram of the structure of the upper housing of the mechanical switch of this utility model;

[0035] Figure 3 This is a schematic diagram of the structure of the lower housing of the mechanical switch of this utility model;

[0036] Figure 4 This is an exploded view of the moving contact assembly of the mechanical switch of this utility model;

[0037] Figure 5 This is a schematic diagram of the structure of the moving contact assembly of the mechanical switch of this utility model;

[0038] Figure 6 and Figure 7 This is a cross-sectional view of the mechanical switch of this utility model;

[0039] Figure 8 This is a schematic diagram of the internal structure of the contact assembly of the mechanical switch of this utility model in the closed position;

[0040] Figure 9 This is a schematic diagram of the internal structure of the contact assembly of the mechanical switch of this utility model in a balanced position;

[0041] Figure 10 This is a schematic diagram of the internal structure of the contact assembly of the mechanical switch of this utility model in the open position;

[0042] The reference numerals in the attached figures include:

[0043] Moving contact assembly 1;

[0044] Moving contact 11; Moving contact 12; Insulating base 13; First elastic element 14; Connecting rod 15; First protective gap 16; Second protective interval 17;

[0045] Drive unit 111; Arc-shaped protrusion 112;

[0046] Moving contact mounting groove 121; first notch 122; connecting groove 123; first mounting shaft 124; second mounting shaft 125; third mounting shaft 126; sliding guide part 127; second mounting shaft mounting base 128; third mounting shaft mounting base 129; mounting base clearance groove 130;

[0047] Second via 141; Third via 142;

[0048] Stationary contact 2; Stationary contact point 21;

[0049] 3; 31; trip coil;

[0050] Closing coil 4; Closing coil mounting slot 41;

[0051] Upper housing 51; lower housing 52; limiting hole 511; limiting post 521. Detailed Implementation

[0052] The specific embodiments of this utility model are further described below with reference to the accompanying drawings. The scope of protection of this utility model is not limited to the description of the following embodiments.

[0053] like Figures 1-10 As shown, a mechanical switch includes a switch housing, and at least one moving contact assembly 1, at least two stationary contacts 2, a tripping coil 3, and a closing coil 4 disposed within the switch housing. The moving contact assembly 1 includes a moving contact 11, with moving contact points 12 at both ends corresponding to the two stationary contacts 2, and the stationary contacts 2 having stationary contact points 21 corresponding to the moving contact 12. Figure 1 As shown, the line connecting the two moving contacts 22 at both ends of the moving contact 11 is located in the first direction X.

[0054] The moving contact assembly 1 is linearly movable along the second direction Y and can move between the closed position and the open position. The first direction X and the second direction Y are perpendicular. In this embodiment, the first direction X is the length direction of the switch housing, that is, the length direction of the moving contact 11, and the second direction Y is the height direction of the switch housing, that is, the thickness direction of the moving contact 11. The opening coil 3 and the closing coil 4 are respectively located on both sides of the moving contact 11 along the second direction Y. The opening coil 3 and the two stationary contacts 2 are all located on the same side of the moving contact 11 along the second direction Y. The opening coil 3 is located between the two stationary contacts 2 along the first direction. When the closing coil or the opening coil is energized, a closing repulsive force or an opening repulsive force is generated between it and the moving contact assembly 1, thereby driving the moving contact assembly 1 to move along the second direction Y to contact or separate from the stationary contacts 2, so as to achieve the effect of controlling the circuit to open or close.

[0055] like Figure 4 As shown in the embodiment of this application, the moving contact assembly 1 further includes at least one insulating seat 13, at least one first elastic member 14, and at least one connecting rod 15 located at both ends of the moving contact 11 along the first direction X.

[0056] At least one insulating base 13 is connected to one end of the moving contact 11 in the first direction X, and at least one of the first elastic elements 14 and at least one of the connecting rods 15 are connected between the insulating base 13 and the switch housing.

[0057] like Figures 6-8 As shown, when the moving contact assembly 1 is in the closed position, the moving contact 11 is in contact with the two stationary contacts 2, and the connecting rod 15 and the first elastic member 14 work together on the first mounting shaft 124 to provide a closing holding force to the moving contact 11, that is, to apply a component force to the moving contact 11 that moves toward the stationary contacts 2.

[0058] like Figure 10 As shown, when the moving contact assembly 1 is in the open position, the moving contact 11 is separated from the two stationary contacts 2, and the connecting rod 15 and the first elastic member 14 work together on the first mounting shaft 124 to provide the opening holding force to the moving contact 11, that is, to apply a component force away from the stationary contacts 2 to the moving contact assembly 1.

[0059] like Figure 9 As shown, there is a balanced position between the closed and open positions. When the moving contact assembly 1 moves to the balanced position, the axes of at least two first elastic elements 14, the connecting rod 15, and the moving contact assembly 1 are located in the same plane. The force exerted by the first elastic elements 14 and the connecting rod 15 on the moving contact assembly 1 is perpendicular to the second direction Y, that is, the force exerted by the first elastic elements 14 and the connecting rod 15 on the moving contact assembly 1 is perpendicular to the second direction Y. Figure 9The horizontal direction in the circuit. The equilibrium position is only a momentary position of the moving contact assembly 1 during its movement between the closed and open positions; the moving contact assembly 1 is not stably located in the equilibrium position.

[0060] In this embodiment, the first elastic element 14 is preferably a tension spring. Of course, in other embodiments, the first elastic element 14 can also be other types of elastic elements, such as a compression spring.

[0061] Compared with the prior art, this application improves the opening and closing speeds of the mechanical switch through the cooperative structure of the first elastic element 14 and the connecting rod 15, thereby improving the transmission efficiency of the mechanical switch. Since the insulating seat 13, the first elastic element 14 and the connecting rod 15 are arranged at both ends of the moving contact 11 along the first direction X, the overall thickness of the mechanical switch is reduced. The guide structure for the moving contact 11 and the repulsive disk connected to the moving contact 11 are not required. There are no other components between the opening coil 3 and the moving contact 11, and between the closing coil 4 and the moving contact 11, which reduces the number of parts, lowers the cost, simplifies assembly, and occupies a small volume.

[0062] Furthermore, such as Figure 8 As shown, when the insulating base 13 puts the moving contact assembly 1 in the closed position, there is a first protective gap 16 between the opening coil 3 and the moving contact 11, such as... Figure 10 As shown, when the moving contact assembly 1 is in the open position, there is a second protective gap 17 between the closing coil 4 and the moving contact 11. When the mechanical switch is open or closed, the moving contact 11 is prevented from hitting the opening coil 3 or the closing coil 4, which would affect the service life of the mechanical switch.

[0063] Preferred, such as Figure 4 and Figure 5 As shown, the insulating base 13 includes a moving contact mounting groove 121. A first notch 122 is formed on the side of the insulating base 13 facing the stationary contact 2. One end of the moving contact 11 is inserted into the moving contact mounting groove 121, and the moving contact 12 is located within the first notch 122 for contacting the stationary contact 21 of the stationary contact 2. Further, as... Figure 4 and Figure 5 As shown, the diameter of the side of the first notch 122 facing the stationary contact 21 is larger than the diameter of the side away from the stationary contact 21, which facilitates contact between the stationary contact 21 and the moving contact 12. Specifically, the sidewall of the first notch 122 is an inclined slope.

[0064] When the circuit is closed, the first notch 122 of the insulating base 13 allows the moving contact 12 and the stationary contact 21 to make reliable contact, ensuring a stable circuit connection. When the circuit is opened, the insulating base 13 contacts the switch housing, preventing the moving contact assembly 1 from directly contacting the closing coil 4 and impacting the closing coil 4, which would affect the service life of the mechanical switch.

[0065] like Figure 4 , Figure 5 and Figure 9 As shown, the insulating base 13 is fixedly connected to the moving contact 11. The insulating base 13 has a connecting groove 123 on the side opposite to the moving contact mounting groove 121. At least one connecting section of the first elastic member 14 and at least one end of the connecting rod 15 is inserted into the connecting groove 123 and can rotate within the connecting groove 123. Sliding guide portions 127 are provided on opposite sides of the connecting groove 123. The first mounting shaft 124 is installed in the connecting groove 123 and its two ends are slidably connected to the sliding guide portions 127. One end of the first elastic member 14 and the connecting rod 15 are rotatably mounted on the first mounting shaft 124, and the other end is rotatably connected to the switch housing.

[0066] In a preferred embodiment of this application, the sliding guide portion 127 is an oblong hole or oblong groove, and the first mounting shaft 124 is installed in the connecting groove 123, with both ends inserted into the two oblong holes or oblong grooves.

[0067] The length direction of the sliding guide 127 is the same as the first direction X. When the moving contact assembly 1 moves between the closed position and the open position, the first mounting shaft 124 slides along the length direction of the sliding guide 127 to adjust the direction of the force.

[0068] like Figures 3-5 and Figure 9 As shown, the switch housing includes two second mounting portions at both ends along the first direction X. The second mounting portion includes at least one second mounting shaft 125 and at least one third mounting shaft 126. The two ends of the connecting rod 15 are respectively rotatably mounted on the first mounting shaft 124 and at least one second mounting shaft 125. The two ends of the first elastic member 14 are rotatably connected to the first mounting shaft 124 and at least one third mounting shaft 126.

[0069] Furthermore, such as Figure 4 and Figure 5 As shown, the two ends of the connecting rod 15 include a second through hole 141 and a third through hole 142, respectively. The two ends of the first mounting shaft 124 pass through the second through hole 141 of at least one connecting rod 15 and are inserted into two waist-shaped holes or waist-shaped slots on the insulating seat 13. The two ends of at least one second mounting shaft 125 pass through the third through hole 142 of at least one connecting rod 15 respectively.

[0070] Preferred, such as Figures 1-3 As shown, the switch housing includes an upper housing 51 and a lower housing 52. At least two stationary contacts 2 and the opening coil 3 are located in the upper housing 51, the closing coil 4 is located in the lower housing 52, and the moving contact assembly 1 is movably disposed between the upper housing 51 and the lower housing 52.

[0071] Furthermore, such as Figure 3 As shown, the second mounting portion further includes at least one protruding second mounting shaft mounting base 128 and at least one protruding third mounting shaft mounting base 129 located on the upper housing 51 and / or the lower housing 52, as... Figure 2 As shown, the upper housing 51 and / or the lower housing 52 include at least one mounting base clearance groove 130 for accommodating at least one second mounting shaft mounting base 128 and at least one third mounting shaft mounting base 129. At least one second mounting shaft 125 is correspondingly mounted on at least one second mounting shaft mounting base 128, and at least one third mounting shaft 126 is correspondingly mounted on at least one third mounting shaft mounting base 129. The upper housing 51 and the lower housing 52 are stacked so that at least one second mounting shaft mounting base 128 and at least one third mounting shaft mounting base 129 are correspondingly mounted in at least one mounting base clearance groove 130, thereby limiting the movement of at least one second mounting shaft 125 and at least one third mounting shaft 126.

[0072] Furthermore, such as Figure 2 As shown, the upper housing 51 is provided with a trip coil mounting slot 31, and the trip coil 3 is installed in the trip coil mounting slot 31; Figure 3 As shown, the lower housing 52 is provided with a closing coil mounting groove 41, and the closing coil 4 is installed in the closing coil mounting groove 41. It can share the space in the thickness (height) direction with the switch housing, thereby reducing the thickness of the switch housing and reducing the volume. Preferably, the opening coil 3 and the closing coil 4 are thin cylindrical sheets with a relatively small axial height, similar to the shape of a coin.

[0073] Furthermore, the upper housing 51 is also provided with a stationary contact mounting groove, and at least two stationary contacts 2 are installed in the stationary contact mounting groove; the upper housing 51 and / or the lower housing 52 include a moving contact assembly clearance groove, and when the mechanical switch is opened or closed, the moving contact assembly 1 can move up and down in the moving contact assembly clearance groove.

[0074] Specifically, when the moving contact assembly 1 moves from the open position to the closed position, after the closing coil 4 is energized, eddy currents are generated at the moving contact 11, causing the closing coil 4 to exert an upward repulsive force on the moving contact 11, driving the moving contact 11 to move towards the stationary contact 2. The moving contact 11 then contacts the stationary contact 2. After the moving contact assembly 1 is in the closed position, as... Figure 8As shown, the first elastic element 14 applies a tensile force F1 along the axis of the first mounting shaft 124. The tensile force F1 causes the first mounting shaft 124 to generate a component force F2 along the length direction of the connecting rod 15. The connecting rod 15 generates a reaction force F3 along the length direction of the first mounting shaft 124. The vector sum of F3 and F1 is F4. The F4 generates an upward component force on the moving contact 11, keeping the moving contact 11 in the closed holding state. The angle between F1 and F3 is an obtuse angle, preferably 150° to 170°.

[0075] Similarly, when the moving contact assembly 1 moves from the closed position to the open position, after the opening coil 3 is energized, eddy currents are generated at the moving contact 11, causing the opening coil 3 to exert a downward repulsive force on the moving contact 11, driving the moving contact 11 to move away from the stationary contact 2. The moving contact 11 separates from the stationary contact 2. After the moving contact assembly 1 is in the open position, as... Figure 10 As shown, the first elastic element 14 applies a tensile force F5 along the axis of the first mounting shaft 124. The tensile force F5 causes the first mounting shaft 124 to generate a component force F6 along the length direction of the connecting rod 15. The connecting rod 15 generates a reaction force F7 along the length direction of the first mounting shaft 124. The vector sum of F7 and F5 is F8. F8 generates a downward component force on the moving contact 11, keeping the moving contact 11 in the open holding state. The included angle between F5 and F7 is an obtuse angle, preferably 150° to 170°.

[0076] Of course, when the moving contact assembly 1 moves from the open position to the closed position, the period during which F4 generates an upward component force on the moving contact 11 is not limited to after the moving contact 11 contacts the stationary contact 2 and before the moving contact 11 contacts the stationary contact 2. F4 can also generate an upward component force on the moving contact 11, which helps the mechanical switch to close quickly and improves the transmission efficiency of the mechanical switch.

[0077] When the moving contact assembly 1 moves from the closed position to the open position, the period during which F8 generates a downward component force on the moving contact 11 is not limited to after the moving contact assembly 1 is in the open position. Before the moving contact assembly 1 reaches the open position, F8 can also generate a downward component force on the moving contact 11, which helps the mechanical switch to open quickly, reduces the generation of arcing, and improves the transmission efficiency of the mechanical switch.

[0078] Preferably, the distance between the equilibrium position and the closed position of the moving contact assembly 1 is less than or equal to the distance between the equilibrium position and the open position of the moving contact assembly 1. This facilitates rapid opening, improves transmission efficiency, and reduces arcing. During the opening process, when the moving contact assembly 1 is below the equilibrium position, the first elastic element 14 and the connecting rod 15 exert a downward force on the moving contact assembly 1, driving the moving contact 11 to the open position. Conversely, when the moving contact assembly 1 is above the equilibrium position, the first elastic element 14 and the connecting rod 15 exert an upward force on the moving contact assembly 1, driving the moving contact 11 to the closed position. During the opening process, the moving contact assembly 1 needs to overcome this upward force. The smaller the distance between the equilibrium position and the closed position of the moving contact assembly 1, the smaller the upward force exerted by the first elastic element 14 and the connecting rod 15 on the moving contact 11, which is more conducive to the opening of the mechanical switch. The specific distance difference between the two can be set according to the product specifications, but it is necessary to ensure that the closing holding force is sufficient for the moving and stationary contacts to make full contact when the circuit is closed. Of course, in a less desirable embodiment, the distance between the equilibrium position and the closed position of the moving contact assembly 1 can also be greater than the distance between the equilibrium position and the open position of the moving contact assembly 1.

[0079] Specifically, the distance between the balanced position and the closed position of the moving contact assembly 1 is H1, and the distance between the balanced position and the open position of the moving contact assembly 1 is H2, where 1 / 3 ≤ H1 / H2 ≤ 1.

[0080] Preferred, such as Figure 3 As shown, the distance between the third mounting shaft mounting base 129 and the insulating seat 13 is greater than the distance between the corresponding second mounting shaft mounting base 128 and the insulating seat 13. That is, the distance between the second mounting shaft 125 and the insulating seat 13 is greater than the distance between the third mounting shaft 126 and the corresponding insulating seat 13. After the moving contact assembly 1 leaves the equilibrium position, during its movement along the second direction, a certain angle is formed between the axis of the first elastic element 14 and the length direction of the connecting rod 15. This creates an angle between the direction of the reaction force of the connecting rod 15 on the moving contact 11 and the direction of the pulling force of the first elastic element 14 on the moving contact 11, generating an upward or downward component force on the moving contact 11.

[0081] Preferred, such as Figure 4 As shown, the moving contact 11 has a strip-shaped structure, including contact portions at both ends in the first direction X, and a driving portion 111 located between the two contact portions. The two moving contacts 12 are respectively located at the two contact portions, as shown. Figure 1As shown, in this embodiment, the third direction Z is the width direction of the switch housing, that is, the width direction of the moving contact 11. The third direction Z is perpendicular to the first direction X and the second direction Y. The driving part 111 protrudes along both sides of the third direction Z to form arc-shaped protrusions 112. The driving part 111 and the arc-shaped protrusions 112 on both sides form a repulsion zone. The repulsion zone is approximately circular and is correspondingly arranged with the opening coil 3 and the closing coil 4. This facilitates the eddy current generated at the moving contact 11 when the opening coil 3 and the closing coil 4 are energized, providing a reaction force to drive the moving contact assembly 1 to move.

[0082] Preferably, the switch housing is provided with a second elastic element (not shown in the figure) to buffer the impact force when the moving contact 11 opens. At least one second elastic element is connected between the moving contact 11 and the upper housing 51 and / or the lower housing 52. When the mechanical switch opens, at least one second elastic element can act as a buffer, preventing the moving contact 11 from colliding with the closing coil 51 or the upper housing 51 or the lower housing 52, thus affecting the service life of the mechanical switch. The second elastic element can be a tension spring, compression spring, torsion spring, or other elastic elements. Preferably, the second elastic element located between the lower housing 52 and the moving contact 11 is a compression spring, and / or, the second elastic element located between the upper housing 51 and the moving contact 11 is a tension spring.

[0083] Preferred, such as Figure 2 and Figure 3 As shown, the upper housing 51 and the lower housing 52 are fixed together by screws. The lower housing 52 is provided with at least one limiting post 521, and the upper housing 51 is provided with at least one limiting hole 511; alternatively, the lower housing 52 is provided with at least one limiting hole 511, and the upper housing 51 is provided with at least one limiting post 521. The at least one limiting post 521 and the at least one limiting hole 511 are correspondingly inserted to limit the horizontal movement of the upper housing 51 and the lower housing 52. The limiting post 521 includes an internal threaded hole, and the limiting hole 511 also includes an internal thread. Screws are passed through the limiting post 521 and the limiting hole 511 for clamping and fixing.

[0084] Of course, the upper housing 51 and the lower housing 52 can also be fixed by snap-fit, or by hot-melt fixing through hot-melt pillars and hot-melt holes, or the upper housing 51 and the lower housing 52 can also be fixed by welding or riveting, which will not be elaborated further.

[0085] Due to the simplified moving contact assembly scheme of this application, the thickness of the mechanical switch can be greatly reduced.

[0086] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0087] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A mechanical switch, comprising a switch housing, and at least one moving contact assembly (1), at least two stationary contacts (2), a tripping coil (3), and a closing coil (4) disposed within the switch housing, wherein the moving contact assembly (1) includes a moving contact (11), and the moving contact (11) has moving contacts (12) at both ends corresponding to the two stationary contacts respectively; the stationary contacts (2) have stationary contacts (21) corresponding to the moving contacts (12); the line connecting the two moving contacts (12) at both ends of the moving contact (11) is located in a first direction; the moving contact assembly (1) is linearly movable between a closed position and a tripping position along a second direction; the tripping coil (3) and the closing coil (4) are respectively located on both sides of the moving contact (11) along the second direction; the tripping coil (3) and the two stationary contacts (2) are both located on the same side of the moving contact (11) along the second direction; and the tripping coil (3) is located between the two stationary contacts (2) along the first direction, characterized in that: At least one insulating seat (13), at least one first elastic element (14), and at least one connecting rod (15) are provided at both ends of the moving contact (11) along the first direction. The insulating seat (13) is fixedly connected to the moving contact (11) and is provided with a connecting groove (123). Sliding guide portions (127) are provided on opposite sides of the connecting groove (123). The first mounting shaft (124) is installed in the connecting groove (123) and its two ends are slidably connected to the sliding guide portions (127). One end of the first elastic element (14) and the connecting rod (15) are rotatably mounted on the first mounting shaft (124) and the other end is rotatably connected to the switch housing. When the moving contact assembly (1) moves between the closed position and the open position, the first mounting shaft (124) slides along the length direction of the sliding guide portion (127). When the moving contact assembly (1) is in the closed position, the moving contact (11) is in contact with the two stationary contacts (2), and the connecting rod (15) and the first elastic element (14) work together on the first mounting shaft (124) to provide the moving contact (11) with a closing holding force; when the moving contact assembly (1) is in the open position, the moving contact (11) is separated from the two stationary contacts (2), and the connecting rod (15) and the first elastic element (14) work together on the first mounting shaft (124) to provide the moving contact (11) with an opening holding force.

2. The mechanical switch according to claim 1, characterized in that, The switch housing includes at least one second mounting shaft mounting base (128) and at least one third mounting shaft mounting base (129). The other end of the connecting rod (15) is rotatably mounted on the second mounting shaft mounting base (128), and the other end of the first elastic member (14) is rotatably mounted on the third mounting shaft mounting base (129). The distance between the third mounting shaft mounting base (129) and the insulating seat (13) is greater than the distance between the corresponding second mounting shaft mounting base (128) and the insulating seat (13). During the movement of the moving contact assembly (1) along the second direction, an angle is formed between the axis of the first elastic element (14) and the length direction of the connecting rod (15).

3. The mechanical switch according to claim 2, characterized in that, The insulating base (13) has a moving contact mounting groove (121) on the side facing away from the connecting groove (123). The insulating base (13) has a first notch (122) on the side facing the stationary contact (2). The moving contact (11) has moving contact points (12) at both ends that correspond to the two stationary contacts (2). One end of the moving contact (11) is inserted into the moving contact mounting groove (121), and the moving contact point (12) is located in the first notch (122).

4. The mechanical switch according to claim 2, characterized in that, The switch housing further includes at least one second mounting shaft (125) and at least one third mounting shaft (126). The at least one second mounting shaft (125) is correspondingly mounted on at least one second mounting shaft mounting base (128), and the at least one third mounting shaft (126) is correspondingly mounted on at least one third mounting shaft mounting base (129). At least one connecting rod (15) has its two ends rotatably mounted on a first mounting shaft (124) and at least one second mounting shaft (125), respectively. At least one first elastic member (14) has its two ends rotatably mounted on a first mounting shaft (124) and at least one third mounting shaft (126), respectively.

5. The mechanical switch according to claim 4, characterized in that, The sliding guide (127) includes a waist-shaped hole or a waist-shaped groove. The two ends of the connecting rod (15) include a second through hole (141) and a third through hole (142), respectively. The two ends of the first mounting shaft (124) pass through the second through hole (141) of at least one connecting rod (15) and are inserted into the two waist-shaped holes or waist-shaped grooves on the insulating seat (13). The two ends of at least one second mounting shaft (125) pass through the third through hole (142) of at least one connecting rod (15).

6. The mechanical switch according to claim 4, characterized in that, The switch housing includes an upper housing (51) and a lower housing (52). At least two stationary contacts (2) and the opening coil (3) are located in the upper housing (51), and the closing coil (4) is located in the lower housing (52). The moving contact assembly (1) is movably disposed between the upper housing (51) and the lower housing (52).

7. The mechanical switch according to claim 6, characterized in that, At least one raised second mounting shaft mounting base (128) and at least one raised third mounting shaft mounting base (129) are located on the upper housing (51), and the lower housing (52) includes at least one mounting base clearance groove (130) for accommodating at least one second mounting shaft mounting base (128) and at least one third mounting shaft mounting base (129), or, at least one raised second mounting shaft mounting base (128) and at least one raised third mounting shaft mounting base (129) are located on the lower housing (52), and the upper housing (51) includes at least one mounting base clearance groove (130) for accommodating at least one second mounting shaft mounting base (128) and at least one third mounting shaft mounting base (129). At least one second mounting shaft (125) is mounted on at least one second mounting shaft mounting base (128), and at least one third mounting shaft (126) is mounted on at least one third mounting shaft mounting base (129). The upper housing (51) and the lower housing (52) are stacked and installed such that at least one second mounting shaft mounting base (128) and at least one third mounting shaft mounting base (129) are mounted in at least one mounting base clearance groove (130) to limit the movement of at least one second mounting shaft (125) and at least one third mounting shaft (126).

8. The mechanical switch according to claim 1, characterized in that, There is a balanced position between the closed position and the open position. When the moving contact assembly (1) moves to the balanced position, the force exerted by the first elastic element (14) and the connecting rod (15) on the moving contact assembly (1) is perpendicular to the second direction of the moving contact (11). The distance between the balanced position and the closed position of the moving contact assembly (1) is less than or equal to the distance between the balanced position and the open position of the moving contact assembly (1).

9. The mechanical switch according to claim 8, characterized in that, The distance between the balanced position and the closed position of the moving contact assembly (1) is H1, and the distance between the balanced position and the open position of the moving contact assembly (1) is H2, where 1 / 3 ≤ H1 / H2 ≤ 1.

10. The mechanical switch according to claim 6, characterized in that, The upper housing (51) is provided with a trip coil mounting slot (31), and the trip coil (3) is installed in the trip coil mounting slot (31); the lower housing (52) is provided with a closing coil mounting slot (41), and the closing coil (4) is installed in the closing coil mounting slot (41); the upper housing (51) is also provided with a stationary contact mounting slot, and at least two stationary contacts (2) are installed in the stationary contact mounting slot; the upper housing (51) and / or the lower housing (52) include a moving contact assembly clearance slot.

11. The mechanical switch according to claim 1, characterized in that, The moving contact (11) includes contact portions located at both ends along a first direction, and a driving portion (111) located between the two contact portions. Two moving contacts (12) are located at the two contact portions respectively. The driving portion (111) protrudes on both sides along a third direction to form arc-shaped protrusions (112). The third direction is perpendicular to the first direction and the second direction respectively. The driving portion (111) and the arc-shaped protrusions (112) on both sides form a repulsion zone, which is correspondingly arranged with the opening coil (3) and the closing coil (4).

12. The mechanical switch according to claim 1, characterized in that, When the moving contact assembly (1) is in the closed position, there is a first protective gap (16) between the opening coil (3) and the moving contact (11). When the moving contact assembly (1) is in the open position, there is a second protective gap (17) between the closing coil (4) and the moving contact (11).

13. The mechanical switch according to claim 1, characterized in that, The switch housing is provided with a second elastic element to buffer the impact force when the moving contact (11) is opened.

14. The mechanical switch according to claim 1, characterized in that, The first elastic element (14) is a tension spring; when the moving contact assembly (1) is in the closed position, the first elastic element (14) applies a tension force F1 along the axis of the first elastic element (14) to the first mounting shaft (124). The tension force F1 causes the first mounting shaft (124) to generate a component force F2 along the length direction of the connecting rod (15) on the connecting rod (15). The connecting rod (15) generates a reaction force F3 along the length direction on the first mounting shaft (124). The vector sum of F3 and F1 is F4. The F4 generates an upward component force on the moving contact (11), causing the moving contact (11) to be in the closed holding state. When the moving contact assembly (1) is in the open position, the first elastic element (14) applies a tension F5 along the axis of the first mounting shaft (124) to the first mounting shaft (124). The tension F5 causes the first mounting shaft (124) to generate a component force F6 along the length direction of the connecting rod (15) on the connecting rod (15). The connecting rod (15) generates a reaction force F7 along the length direction on the first mounting shaft (124). The vector sum of F7 and F5 is F8. F8 generates a downward component force on the moving contact (11), so that the moving contact (11) is in the open holding state.

Images