Power supply control mechanism and switching device

Abstract

The invention relates to the field of low-voltage electric appliances, in particular to a power supply control mechanism and a switching device comprising the power supply control mechanism. In the power supply control mechanism, a reset button has a tripping position and a hasp position, is in hasp fit with a tripping rod and is in transmission fit with a tripper, a control module is electrically connected with the tripper through a connecting circuit, and a switch contact system is connected in series in the connecting circuit; when the reset button is at the hasp position or the release position, the switch contact system is switched on or switched off; a first contact mechanism of the switch contact system comprises a first contact; in the process that the reset button moves to the hasp position / tripping position, the first contact mechanism moves to enable the first contact and the second contact to be connected / disconnected; the first contact and the second contact are of rigid structures; according to the power supply control mechanism and the switching device, the current-carrying capability and the arc-resistant capability of the switch contact system are good.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to a power supply control mechanism and a switching device including the power supply control mechanism. Background Technology

[0002] like Figure 30 As shown, in an existing circuit breaker with residual current protection, the power output from the main circuit's output terminal is rectified by a rectifier circuit (VD2-5 in the figure), converting the AC signal into a DC signal. This DC signal is then divided by a voltage divider circuit (resistors R5-6 in the figure) to provide an electrical signal to the leakage current handling chip (IC in the figure) of the control module. The DC signal directly forms a loop (operating loop) with the trip unit's electromagnetic coil (KA in the figure) and the control module's thyristor (VT2 in the figure). Under normal conditions, the thyristor is open, and the operating loop is not conductive. When a leakage current fault occurs in the main circuit, the leakage current handling chip detects the fault signal, triggering the thyristor to conduct, thus connecting the operating loop. This energizes the trip unit's electromagnetic coil, causing the trip unit to operate and thereby driving the switching device's operating mechanism to trip. If the circuit breaker is wired correctly (i.e., the incoming line is connected to the power supply side wire and the outgoing line is connected to the load side wire), the power take-off point of the control module is the outgoing line of the circuit breaker. After the main circuit of the circuit breaker is disconnected, there is no voltage at the power take-off point, and the leakage protection function stops working. However, if the circuit breaker is wired in reverse (i.e., the incoming line is connected to the load side wire and the outgoing line is connected to the power supply side wire), the power take-off point becomes the incoming line. When a leakage signal occurs and the main circuit of the leakage protection is disconnected, the residual current protection power supply signal of the product still exists. The thyristor continues to conduct and the current is greater than the holding current of the thyristor. Under the continuous operation of the high current signal, the thyristor will inevitably blow up or the electromagnetic coil of the trip unit will burn out.

[0003] Existing circuit breakers with residual current protection function partially solve the above problems by adding a break point between the control module and the electromagnetic coil of the trip unit. When the power is cut off, the circuit breaker also disconnects synchronously after the main circuit of the circuit breaker is disconnected, thereby causing the thyristor to disconnect and the electromagnetic coil of the trip unit to stop working. However, the break point is often implemented with an elastic metal sheet, which has poor current carrying capacity and poor arc resistance. Summary of the Invention

[0004] The purpose of this invention is to overcome at least one defect of the prior art and provide a power supply control mechanism and a switching device including the power supply control mechanism, wherein the switching contact system has good current carrying capacity and arc resistance.

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

[0006] A power supply control mechanism includes a reset button having a tripped position and a latched position, a trip lever, a trip unit, a control module electrically connected to the trip unit via a connecting circuit, and a switch contact system connected in series in the connecting circuit. The reset button is configured to: latch with the trip lever in the latched position; move to the tripped position after disengaging from the trip lever; and, when moving from the tripped position to the latched position, drive the trip unit to reset via the trip lever and re-latch with the trip lever. The control module draws power from the main circuit of the switching device and controls the trip unit to operate according to a signal. The trip lever, driven by the trip unit, moves to drive the operating mechanism of the switching device to trip and disengage the trip lever from the reset button. When the reset button is in the latched or tripped position, the switch contact system is either on or off.

[0007] The switch contact system includes a first contact mechanism and a second contact mechanism linked to the reset button. The first contact mechanism includes a first contact, and the second contact mechanism includes a second contact. During the process of the reset button moving to the latching position, the first contact mechanism moves to close the first contact and the second contact. During the process of the reset button moving to the release position, the first contact mechanism moves to disconnect the first contact and the second contact. The first contact and the second contact are rigid structures.

[0008] Furthermore, the first contact and the second contact make contact and conduction when or before the reset button moves to the latch position.

[0009] Furthermore, the first contact and the second contact are in contact and connected before the reset button moves to the latch position; the reset button is in the middle position when the first contact and the second contact initially make contact, and as the reset button continues to move to the latch position, the first contact mechanism and / or the second contact move under the drive of the reset button and the first contact and the second contact remain in contact and connected.

[0010] Furthermore, the second contact mechanism also includes a second contact spring, which acts on the second contact to keep it in the first position; the reset button moves from the deactivated position to the middle button position, causing the first contact and the second contact to initially contact each other, and then as the reset button continues to move to the latch position, the first contact mechanism drives the second contact to move and stores energy in the second contact spring; as the reset button moves to the deactivated position, the second contact spring releases energy and drives the second contact to reset to the first position.

[0011] Furthermore, the second contact is configured to move or rotate as a whole.

[0012] Furthermore, the second contact is movable as a whole, and the second contact spring is a compression spring, with one end fixed and the other end cooperating with the second contact.

[0013] Furthermore, the power supply control mechanism also includes a housing, which includes a second contact mounting structure disposed on its first bottom wall. The second contact mounting structure includes a second contact spring stop, a second contact guide wall, and a second contact limiting stop. The two sets of second contact guide walls are arranged opposite to each other, and the second contact is slidably disposed between the two sets of second contact guide walls and is guided and limited by the two sets of second contact guide walls respectively. The second contact spring stop and the second contact limiting stop are arranged opposite to each other, with one end of the second contact spring engaging with the second contact spring stop and the other end engaging with the second contact. The second contact spring causes the second contact to be limited and engaged with the second contact limiting stop.

[0014] Furthermore, the first contact is rotatably configured, including a first contact contact portion and a first contact driven portion. One end of the first contact contact portion is bent and connected to one end of the first contact driven portion. The other end of the first contact contact portion 1-11 is provided with a first contact point for cooperating with the second contact. The other end of the first contact driven portion is in transmission cooperation with the reset button.

[0015] Furthermore, a first contact shaft hole is provided at the bent connection between the first contact contact portion and the first contact driven portion, and the first contact is rotatably disposed through the first contact shaft hole;

[0016] The switch contact system further includes a first reset element, which acts on the first contact to give it a tendency to rotate and disconnect from the second contact; during the process of the reset button moving to the latch position, it drives the first contact to rotate and close with the second contact, while the first contact stores energy in the first reset element; during the process of the reset button moving to the trip position, the first reset element releases energy to drive the first contact to rotate and disconnect from the second contact.

[0017] Furthermore, the power supply control mechanism also includes a housing, which includes a button mounting hole; the reset button is integrally movable and includes a button head, a button limiting part, a button locking part, and a button driving part. The button head is slidably disposed in the button mounting hole and one end protrudes outside the housing for external force operation. The button limiting part is limited and cooperates with the housing to prevent the reset button from coming out of the housing. One end of the button locking part is used to engage with the release lever and the other end is bent and connected to one end of the button driving part. One end of the button driving part is used to engage with the first contact driven part. The extension direction of the button driving part is the same as the movement direction of the reset button.

[0018] Furthermore, the housing includes a first half-shell and a second half-shell that are assembled together; the first half-shell includes a drive part guide groove, and the second half-shell includes a drive part guide rib, which is inserted into the drive part guide groove to form a housing guide hole through which the button drive part passes.

[0019] The first half-shell also includes a first contact mounting shaft, one end of which is connected to the first half-shell, and the first contact is rotatably mounted on the first contact mounting shaft through its first contact shaft hole; the second half-shell also includes a first contact limiting post, which abuts against the other end of the first contact mounting shaft, and the outer diameter of the first contact limiting post is larger than the inner diameter of the first contact shaft hole;

[0020] The first half-shell also includes a first trip rod shaft hole, and the second half-shell also includes a second trip rod shaft post. The second trip rod shaft post is provided with a second trip rod shaft hole, and the two ends of the rotating shaft of the trip rod are respectively rotatably inserted into the first trip rod shaft hole and the second trip rod shaft hole.

[0021] The second release lever shaft, the first contact limiting post, and the drive guide rib are connected to each other by reinforcing ribs.

[0022] Furthermore, the second contact is fixedly disposed; the first contact mechanism includes a first contact, a contact support, and a first contact spring. The first contact mechanism is rotatably disposed via the contact support, the first contact is movably disposed on the contact support, and the first contact spring cooperates with both the first contact and the contact support, so that the first contact and the contact support are in a limited engagement and remain relatively stationary; during the process of the reset button moving from the tripped position to the middle position, the contact support is driven to rotate, causing the first contact to initially contact the second contact; then, during the process of the reset button moving from the middle position to the latched position, the contact support is driven to move relative to the first contact and the first contact stores energy; during the process of the reset button moving from the middle position to the tripped position, the first contact spring releases energy, driving the first contact and the contact support to move relative to each other and restore the limited engagement.

[0023] Furthermore, the first contact is rotatably mounted on the contact support; the first contact is electrically connected to the contact support via a first contact spring.

[0024] Furthermore, the power supply control mechanism also includes a transmission rod, one end of which is rotatably connected to the reset button and the other end of which is rotatably connected to the contact support.

[0025] Furthermore, the power supply control mechanism also includes a housing, which includes a button mounting hole; the reset button is movable as a whole, and includes a button head, a button limiting part, and a button locking part. The button head is slidably disposed in the button mounting hole and one end protrudes outside the housing for operation by external force. The button limiting part is limited and cooperates with the housing to prevent the reset button from coming out. The extension direction of the button locking part is perpendicular to the movement direction of the reset button. One end of the button locking part is used to engage with the release lever and the other end is rotatably connected to the transmission rod.

[0026] Furthermore, the mechanism housing includes a first half-shell and a second half-shell that are assembled together; the first half-shell includes a drive part guide groove, and the second half-shell includes a drive part guide rib, which is inserted into the drive part guide groove to form a housing guide hole through which the transmission rod passes.

[0027] The first half-shell also includes a first contact mounting shaft, one end of which is connected to the first half-shell, and the first contact mechanism is rotatably mounted on the first contact mounting shaft through its first contact shaft hole; the second half-shell also includes a first contact limiting post, which abuts against the other end of the first contact mounting shaft, and the outer diameter of the first contact limiting post is larger than the inner diameter of the first contact shaft hole;

[0028] The first half-shell also includes a first trip rod shaft hole, and the second half-shell also includes a second trip rod shaft post. The second trip rod shaft post is provided with a second trip rod shaft hole, and the two ends of the rotating shaft of the trip rod are respectively rotatably inserted into the first trip rod shaft hole and the second trip rod shaft hole.

[0029] The second release lever shaft, the first contact limiting post, and the drive guide rib are connected to each other by reinforcing ribs.

[0030] The power supply control mechanism of the present invention, in its switch contact system, can disconnect the power supply circuit of the thyristor and the trip unit (that is, disconnect the operating circuit) regardless of whether the switch appliance is connected in the forward or reverse direction. It also ensures that the electromagnetic coils of the thyristor and the trip unit will not be damaged due to prolonged high current flow under leakage faults. Moreover, the arrangement of the first contact mechanism and the second contact, and the fact that the first and second contacts are rigid structures, allows the first and second contacts to be made of thicker metal materials, thereby increasing the current carrying capacity and arc burn resistance of the switch contact system, and also improving the breaking capacity of the switch contact system.

[0031] Furthermore, the button drive unit and the first contact have a simple and reliable connection method.

[0032] In addition, the button driving part is limited by the guide hole of the housing, thereby limiting the button driving part and preventing damage to it during operation. The button driving part and the first contact are reliably engaged, and the reset button itself is prevented from excessive swinging.

[0033] A switching device comprising the aforementioned power supply control mechanism.

[0034] The switching device of the present invention, including the power supply control mechanism, ensures that the electromagnetic coils of the thyristor and the trip unit will not be damaged due to prolonged passage of large current under leakage faults. Attached Figure Description

[0035] Figure 1This is a schematic diagram of the structure of the switching device of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of the switching device according to the first embodiment of the present invention, wherein the first half-shell and the second half-shell are in a separated state;

[0037] Figure 3 This is a projected view of the power supply control mechanism of the switching device according to the first embodiment of the present invention;

[0038] Figure 4 This is a three-dimensional structural schematic diagram of the power supply control mechanism of the switching device according to the first embodiment of the present invention;

[0039] Figure 5 This is the present invention. Figure 4 An enlarged structural diagram of part S1;

[0040] Figure 6 This is a projected view of the first half-shell of the switching device according to the first embodiment of the present invention;

[0041] Figure 7 This is a three-dimensional structural schematic diagram of the first half-shell of the switching device according to the first embodiment of the present invention;

[0042] Figure 8 This is the present invention. Figure 7 An enlarged structural diagram of part S2;

[0043] Figure 9 This is the present invention. Figure 7 An enlarged structural diagram of part S3;

[0044] Figure 10 This is a schematic diagram of the structure of the second half-shell of the switching device of the present invention;

[0045] Figure 11 This is the present invention. Figure 10 An enlarged structural diagram of part S4;

[0046] Figure 12 This is a cross-sectional structural schematic diagram of the switching device according to the first embodiment of the present invention;

[0047] Figure 13 This is a schematic diagram of the structure of the reset button of the switching device according to the first embodiment of the present invention;

[0048] Figure 14 This is a schematic diagram of the structure of the first contact of the switching device according to the first embodiment of the present invention;

[0049] Figure 15 This is a schematic diagram of the structure of the second contact of the switching device according to the first embodiment of the present invention;

[0050] Figure 16This is a schematic diagram of the structure of the switching device according to the second embodiment of the present invention, wherein the first half-shell and the second half-shell are in a separated state;

[0051] Figure 17 This is a projected view of the power supply control mechanism of the switching device according to the second embodiment of the present invention;

[0052] Figure 18 This is a three-dimensional structural diagram of the power supply control structure of the switching device according to the second embodiment of the present invention;

[0053] Figure 19 This is the present invention. Figure 18 An enlarged structural diagram of the S5 part;

[0054] Figure 20 This is a projected view of the first half-shell of the switching device according to the second embodiment of the present invention;

[0055] Figure 21 This is a three-dimensional structural schematic diagram of the first half-shell of the switching device according to the second embodiment of the present invention;

[0056] Figure 22 This is the present invention. Figure 21 An enlarged structural diagram of the S6 section;

[0057] Figure 23 This is a cross-sectional structural schematic diagram of the switching device according to the second embodiment of the present invention;

[0058] Figure 24 This is a schematic diagram of the structure of the reset button of the switching device according to the second embodiment of the present invention;

[0059] Figure 25 This is a schematic diagram of the structure of the first contact mechanism of the switching device according to the second embodiment of the present invention;

[0060] Figure 26 This is a schematic diagram of the structure of the first contact of the switching device according to the second embodiment of the present invention;

[0061] Figure 27 This is a schematic diagram of the contact support structure of the switching device according to the second embodiment of the present invention;

[0062] Figure 28 This is a schematic diagram of the structure of the first contact spring of the switching device according to the second embodiment of the present invention;

[0063] Figure 29 This is a schematic diagram of the structure of the second contact of the switching device according to the second embodiment of the present invention;

[0064] Figure 30 This is the electrical schematic diagram of a circuit breaker with residual current protection function in the existing technology.

[0065] Explanation of reference numerals in the attached figures

[0066] Leakage current operating unit c;

[0067] Reset button r, button head r1, button clearance groove r11, button connecting side wall r12, button guide side wall r13, button bottom wall r14, button limiting part r2, button locking part r3, button locking end r31, button connecting hole r32, button driving part r4.

[0068] Switch contact system a; First contact mechanism 1, first contact 1-1, first contact contact part 1-11, first contact driven part 1-12, first contact connecting part 1-13, first contact wiring part 1-14, first contact 1-15, first contact shaft hole 1-16, first contact spring hole 1-17, first contact wiring hole 1-18, spring limit block 1-19, contact support 1-2, support side plate 1-21, support connecting plate 1-22, support shaft hole 1-211, support connecting hole 1-212, support wiring part 1-23, Support wiring hole 1-231, First contact limit stop 1-24, First contact spring 1-3, Single torsion spring part 1-31, Helical body 1-311, First torsion spring arm 1-312, Second torsion spring arm 1-313, Connecting section 1-32; Second contact mechanism 2, Second contact 2-1, Second contact contact plate 2-11, Second contact intermediate plate 2-12, Second contact support leg 2-13, Second contact wiring plate 2-14, Second contact wiring hole 2-15, Second contact spring 2-2; First reset component 7;

[0069] Release lever 3, release lever mounting part 3-2, release lever mating plate 3-1;

[0070] Trip unit 4, coil assembly 4-1, push rod 4-2;

[0071] Zero-sequence current transformer 5;

[0072] Drive rod 6;

[0073] Housing h, first half-shell h1, button mounting hole h1-1, button head guide groove h1-11, button limiting plate h1-2, drive part guide groove h1-3, second contact mounting structure h1-4, second contact spring stop h1-41, spring stop plate h1-411, spring limiting block h1-412, second contact guide wall h1-42, second contact guide plate h1-421, second contact locking block h1-422, second contact limiting stop h1-43. Second contact hook h1-44, first side baffle h1-45, second side baffle h1-46, second contact stop h1-47, first contact spring post h1-5, first contact mounting shaft h1-6, trip unit mounting groove h1-7, first trip rod shaft hole h1-8; second half shell h2, drive part guide rib h2-3, first contact limiting post h2-6, second trip rod shaft post h2-8, second trip rod shaft hole h2-80; housing guide hole h3;

[0074] Circuit breaker unit b. Detailed Implementation

[0075] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the switching device of the present invention. The switching device of the present invention is not limited to the descriptions in the following embodiments.

[0076] like Figures 1-15 The diagram shows a first embodiment of the switching device of the present invention. The switching device in this embodiment is preferably a circuit breaker, specifically a circuit breaker with residual current protection function.

[0077] like Figures 1-2As shown, the switching device in this embodiment includes a leakage current operating unit c and at least one set of circuit breaking units b. The circuit breaking unit b includes an operating mechanism (i.e., the operating mechanism of the switching device) and a main contact system. The circuit containing the main contact system is the main circuit. The main contact system includes a cooperating active contact and a main stationary contact. The operating mechanism is driven by the active contact to drive the active contact and the main stationary contact to close and open. The operating mechanism is preferably implemented by existing technology, such as an operating mechanism with a four-bar linkage structure, which will not be described in detail here. The leakage current operating unit c includes a control module and a trip unit 4. When a leakage current fault occurs in the circuit containing the circuit breaking unit b, the control module controls the trip unit 4 to operate according to the signal (i.e., the leakage current fault signal). The trip unit 4 drives the operating mechanism to trip, causing the switching device in this embodiment to trip and open. Furthermore, the signal can also be a remote tripping signal. That is, after the control module receives the remote tripping signal, it controls the trip unit 4 to operate. The trip unit 4 drives the operating mechanism to trip, causing the switching device in this embodiment to trip and open. In other words, the leakage current operating unit c can also realize the remote tripping function. Furthermore, the switching device of this embodiment includes two or more circuit breaking units b, each circuit breaking unit b including a main contact system, and each circuit breaking unit b including an independent operating mechanism. Each operating mechanism can be operated synchronously to close and open via a linkage structure (e.g., a linkage handle), and each operating mechanism is driven by the trip unit 4 to trip; or, each circuit breaking unit b shares a set of operating mechanisms, and the active contacts of the main contact system of each circuit breaking unit b are all connected to the operating mechanism. Furthermore, the switching device of this embodiment also includes a zero-sequence current transformer 5, the zero-sequence current transformer 5 including an induction coil, and the circuit breaking unit b including a conductor connected in series with the main contact system and passing through the zero-sequence current transformer 5.

[0078] Furthermore, the leakage current operating unit c also includes a reset button r and a trip lever 3. The trip lever 3 is driven by the trip unit 4. The reset button r has a latching position and a tripping position. When the reset button r is in the latching position, it latches with the trip lever 3. The control module receives a signal and controls the trip unit 4 to operate. The trip unit 4 drives the trip lever 3 to move, causing the trip lever 3 to disengage from the reset button r and the reset button r to move to the tripping position. At the same time, the trip lever 3 drives the operating mechanism of the circuit breaker unit b to trip. Before the trip unit 4 and the trip lever 3 reset, the operating mechanism cannot latch again. When the reset button r moves to the latching position under external force, it latches with the trip lever 3. 3. When the latch is restored and the trip lever 3 drives the trip unit 4 to reset, the operating mechanism can be latched again, and then the closing operation can be performed again. This means that the trip lever 3 also has two working positions: a locked position and an unlocked position. When the reset button r is in the latched position and the trip lever 3 is in the locked position, the two are latched together. When the trip unit 4 is activated and drives the trip lever 3 to move to the unlocked position, the trip lever 3 releases the latching engagement with the reset button r and simultaneously drives the operating mechanism to trip. When the reset button r moves from the tripped position to the latched position, it drives the trip lever 3 from the unlocked position to the locked position, and at the same time, the trip lever 3 drives the trip unit 4 to reset. Furthermore, the leakage current operating unit c also includes a housing h, in which the trip unit 4, the trip lever 3, and the control module are all housed. The housing h also serves as the housing of the power supply control mechanism of the switching device in this embodiment.

[0079] Specifically, such as Figure 2 , 6 As shown in -7, 10, and 12, the housing h (i.e., the mechanism housing) includes a first half-shell h1 and a second half-shell h2 that are assembled together.

[0080] Specifically, such as Figures 3-8 As shown in Figures 10 and 12, the reset button r is configured to move as a whole, preferably in a linear sliding configuration. Further, the reset button r includes a button head r1; the mechanism housing (i.e., the shell h) includes a button mounting hole h1-1, the button head r1 is slidably disposed within the button mounting hole h1-1 with one end protruding outside the mechanism housing for operation by external force. Further, the first half-shell h1 is provided with a button head sliding groove, and the second half-shell h2 is provided with a button head limiting post, the button head limiting post being inserted into the button head sliding groove to form the button mounting hole h1-1.

[0081] Specifically, such as Figures 3-7As shown in Figures 10-13, the trip lever 3 is rotatably mounted. Further, the trip lever 3 includes a trip lever mounting part 3-2 and a trip lever mating plate 3-1. The trip lever mounting part 3-2 is mounted on one end of the trip lever mating plate 3-1. The trip lever 3 is rotatably mounted via the trip lever mounting part 3-2. The trip lever mating plate 3-1 is kinetically connected to the trip unit 4 and engages with the reset button r. Further, the trip unit 4 includes a coil assembly 4-1 and a push rod 4-2. One end of the push rod 4-2 is movably inserted into the coil assembly 4-1, and the other end is kinetically connected to the trip lever mating plate 3-1. The transmission and connection methods between the push rod 4-2 and the trip lever mating plate 3-1 can be implemented using existing technology and will not be elaborated here. Furthermore, the trip lever mating plate 3-1 includes a trip lever latching hole, and the reset button r includes a button locking part r3. One end of the button locking part r3 is inserted into the trip lever latching hole to achieve a latching engagement between the trip lever 3 and the reset button r. The trip lever 3 rotates under the drive of the trip unit 4, causing the button locking part r3 to disengage from the trip lever latching hole, thereby releasing the latching engagement between the trip lever 3 and the reset button r. It should be noted that the trip lever 3 is not limited to a rotating configuration. For example, the trip lever 3 can also be linearly movable. The trip lever 3 moves in a first direction to disengage from the reset button r. The reset button r moves to the latching position and drives the trip lever 3 to move in a second direction, thereby restoring the latching engagement between the reset button r and the trip lever 3. At the same time, the trip lever 3 drives the trip unit 4 to reset. The first and second directions are opposite to each other. Furthermore, the first half-shell h1 of the housing h includes a first trip rod shaft hole h1-8, and the second half-shell h2 includes a second trip rod shaft post h2-8. The second trip rod shaft post h2-8 is provided with a second trip rod shaft hole h2-80. The two ends of the rotating shaft of the trip rod 3 are respectively rotatably inserted into the first trip rod shaft hole h1-8 and the second trip rod shaft hole h2-80. The first half-shell h1 includes a trip unit mounting groove h1-7, and the coil assembly 4-1 is fixedly installed in the trip unit mounting groove h1-7.

[0082] Furthermore, the switching device in this embodiment also includes a button spring. The button spring acts on the reset button r, causing it to tend to move towards the tripped position. That is, after the reset button r and the tripping lever 3 are released from the latching engagement, the button spring drives the reset button r to move from the latching position to the tripped position. When the reset button r moves towards the latching position, it needs to overcome the force of the button spring and allow the button spring to store energy.

[0083] like Figures 2-4As shown, the switching device in this embodiment also includes a power supply control mechanism. The power supply control mechanism includes a reset button r having a tripped position and a latched position, a tripping lever 3, a trip unit 4, a control module electrically connected to the trip unit 4 via a connection circuit, and a switch contact system a connected in series in the connection circuit. The reset button r is used to: latch with the tripping lever 3 in the latched position; move to the tripped position after disengaging from the tripping lever 3; and, when moving from the tripped position to the latched position, drive the trip unit 4 to reset via the tripping lever 3 and restore latching with the tripping lever 3. That is, when the reset button r is in the latched position, it latches with the tripping lever 3; after disengaging from the tripping lever 3, the reset button r moves to the tripped position; and when the reset button r moves from the tripped position to the latched position, it drives the trip unit 4 to reset via the tripping lever 3. And it re-engages with the trip lever 3; the control module is used to draw power from the main circuit of the switchgear and control the trip unit 4 to operate according to the signal. The trip lever 3 is driven by the trip unit 4 to move, which is used to drive the operating mechanism of the switchgear (that is, the operating mechanism of the circuit breaker unit b mentioned above) to trip and release the trip lever 3 from the trip button r; when the reset button r is in the latched position or the tripped position, the switch contact system a is turned on or off. That is, when the reset button r is in the latched position, the switch contact system a is turned on (i.e., the switch contact system a is in the on state), thereby turning on the connection circuit used to connect the control module and the trip unit 4. When the reset button r is in the tripped position, the switch contact system a is turned off (i.e., the switch contact system a is in the off state), thereby turning off the connection circuit used to connect the control module and the trip unit 4.

[0084] In this embodiment of the switchgear, the switch contact system a is linked with the reset button r. When the reset button r is in the latch position, the switch contact system a closes and conducts. After receiving the signal, the control module drives the trip unit 4 to operate. The trip unit 4 drives the operating mechanism of the switchgear to trip through the trip rod 3, causing the switchgear of this embodiment to open. The main circuit is then disconnected, and the electromagnetic coils of the thyristor and the trip unit 4 will not be damaged due to prolonged passage of large current (greater than the holding current of the thyristor) under leakage fault. Moreover, regardless of whether the switchgear is connected in the forward or reverse direction, the switch contact system a can disconnect the power supply circuit of the thyristor and the trip unit 4 (that is, the operating circuit is disconnected), thus ensuring that the electromagnetic coils of the thyristor and the trip unit 4 will not be damaged due to prolonged passage of large current under leakage fault.

[0085] like Figures 2-4As shown, the switch contact system a includes a first contact mechanism 1 and a second contact mechanism 2 linked with the reset button r. The first contact mechanism 1 includes a first contact 1-1, and the second contact mechanism 2 includes a second contact 2-1. The first contact mechanism 1 closes and opens with the first contact 1-1 and the second contact 2-1. During the process of the reset button r moving to the latching position, that is, during the process of the reset button r moving from the disengaged position to the latching position, the first contact mechanism 1 is driven to move, thereby closing the first contact 1-1 and the second contact 2-1. When the reset button r moves to the disengaged position, the first contact mechanism 1 moves, thereby opening the first contact 1-1 and the second contact 2-1. The first contact 1-1 and the second contact 2-1 are rigid structures.

[0086] The arrangement of the first contact 1-1 and the second contact 2, both of which are rigid structures, allows the first contact 1-1 and the second contact 2-1 to be made of thicker metal material, thereby increasing the current carrying capacity and arc burn resistance of the switch contact system a, and also helps to improve the breaking capacity of the switch contact system a.

[0087] Furthermore, the first contact 1-1 and the second contact 2-1 are made in contact and connected when the reset button r moves to the latch position or before it does. That is, the moment when the first contact 1-1 and the second contact 2-1 are made in contact and connected is the same as the moment when the reset button r moves to the latch position, or the moment when the first contact 1-1 and the second contact 2-1 are made in contact and connected is before the moment when the reset button r moves to the latch position. Furthermore, the fact that the first contact 1-1 and the second contact 2-1 are made in contact before the reset button r moves to the latch position ensures that the first contact 1-1 and the second contact 2-1 are reliably closed when the reset button r drives the trip unit 4 to reset via the trip lever 3. Furthermore, when the reset button r initially contacts the first contact 1-1 and the second contact 2-1, it is in the middle position. As the reset button r continues to move to the latch position, that is, as the reset button r moves from the middle position to the latch position, the first contact mechanism 1 and / or the second contact 2-1 move under the drive of the reset button r, and the first contact 1-1 and the second contact 2-1 remain in a conductive state. In other words, as the reset button r moves from the middle position to the latch position, the first contact mechanism 1 and the second contact 2-1 remain in a contact and conductive state. One of the first contact mechanism 1 and the second contact 2-1 moves under the drive of the reset button r, while the other remains stationary. Alternatively, both the first contact mechanism 1 and the second contact 2-1 move under the drive of the reset button r1. This ensures both the reliable closing of the switch contact system a and the ability of the reset button r to move to the latch position to restore the latching engagement with the trip lever 3 and drive the trip unit 4 to reset.

[0088] like Figures 2-4As shown, in the power supply control mechanism of this embodiment, when the reset button r moves from the middle position to the latch position, the first contact mechanism 1 and the second contact 2-1 both move under the drive of the reset button r.

[0089] Furthermore, such as Figures 2-4 As shown, the second contact 2-1 has two working positions, namely the first position and the second position; the switch contact system a also includes a second contact spring 2-2, which acts on the second contact 2-1 to keep it in the first position; the reset button r moves from the tripped position to the middle position, causing the first contact 1-1 to initially contact the second contact 2-1, while the second contact 2-1 remains in the first position. Then, during the process of the reset button r moving from the middle position to the latched position, the first contact mechanism 1 drives the second contact 2-1 to move and causes the second contact spring 2-2 to store. Yes, that is, when the reset button r moves from the middle position to the latch position, the reset button r drives the first contact mechanism 1 to move, and the first contact mechanism 1 simultaneously drives the second contact 2-1 to move. At this time, the second contact 2-1 is in the second position, and the second contact 2-1 simultaneously stores energy in the second contact spring 2-2. During the process of the reset button r (from the latch position) moving to the release position, the second contact spring 2-2 releases energy and drives the second contact 2-1 to reset to the initial position of the second contact, that is, the second contact spring 2-2 releases energy and drives the second contact 2-1 to move from the second position to the first position.

[0090] Furthermore, the second contact 2-1 is configured to move or rotate as a whole. Furthermore, in this embodiment, as... Figures 2-4 As shown, the second contact 2-1 is preferably configured to move as a whole. Furthermore, the second contact spring 2-2 is a compression spring, with one end fixed (e.g., fixed to the mechanism housing) and the other end engaging with the second contact 2-1.

[0091] Specifically, such as Figures 3-4 As shown in Figures 6-7, 9, and 15, one implementation method for the overall movement of the second contact 2-1 is as follows:

[0092] The housing includes a second contact mounting structure h1-4 disposed on its first bottom wall. The second contact mounting structure h1-4 includes a second contact spring stop h1-41, a second contact guide wall h1-42, and a second contact limiting stop h1-43. The two sets of second contact guide walls h1-42 are arranged opposite to each other. The second contact 2-1 is slidably disposed between the two sets of second contact guide walls h1-42, that is, the two sets of second contact guide walls h1-42 form a second contact sliding groove open at both ends. The second contact 2-1 is slidably disposed within the second contact sliding groove. The two sets of second contact guide walls h1-42 are used for guiding and limiting, so that the second contact 2-1 can only move along the extension direction of the second contact sliding groove. The second contact spring stop h1-41 and the second contact limiting stop h1-43 are arranged opposite to each other, and are respectively arranged opposite to the two ends of the second contact sliding groove. One end of the second contact spring 2-2 is engaged with the second contact spring stop h1-41 and the other end is engaged with the second contact 2-1. The second contact spring 2-2 limits the engagement between the second contact 2-1 and the second contact limiting stop h1-43, thus holding the second contact 2-1 in the first position. Furthermore, the first half-shell h1 includes a first bottom wall, that is, the second contact mounting structure h1-4 is disposed on the first half-shell h1.

[0093] In another embodiment of the second contact mounting structure h1-4, the second contact limiting stop h1-43 is not provided on the first bottom wall. At least one set of second contact guide walls h1-42 has a second contact limiting stop h1-43 at one end away from the second contact spring stop h1-41. One end of the second contact limiting stop h1-43 is connected to the corresponding second contact guide wall h1-42, and the other end protrudes towards the middle of the two sets of second contact guide walls h1-42.

[0094] Furthermore, the second contact 2-1 includes a second contact plate 2-11, a second contact intermediate plate 2-12, and a second contact support leg 2-13. The second contact plate 2-11 is used to close and open with the first contact 1-1. Of the two sides of the second contact intermediate plate 2-12, one side is bent and connected to one end of the second contact plate 2-11, and the other side is bent and connected to one end of the second contact support leg 2-13. The second contact intermediate plate 2-12 is disposed opposite to the first bottom wall. The second contact plate 2-11 and the second contact support leg 2-13 are bent toward the same side of the second contact plate 2-11. The other end of the second contact plate 2-11 and the other end of the second contact support leg 2-13 are respectively slidably engaged with the first bottom wall. The second contact plate 2-11 and the second contact intermediate plate 2-12 are both slidably disposed between the two sets of second contact guide walls h1-42. One end of the second contact spring 2-2 is engaged with the second contact spring stop h1-41 and the other end is engaged with the second contact support leg 2-13. The second contact spring 2-2 causes the free end of the second contact plate 2-11 (i.e., the end of the second contact plate 2-11 that is slidably engaged with the first bottom wall) to abut against the second contact limiting stop h1-43 for limiting engagement. Furthermore, the second contact 2-1 also includes a second contact wiring plate 2-14. The second contact wiring plate 2-14 and the second contact intermediate plate 2-12 are coplanar and together form an L-shaped structure. The second contact wiring plate 2-14 is used to connect wires to connect the second contact 2-1 to the corresponding circuit. Furthermore, the second contact terminal block 2-14 is provided with a second contact wiring hole 2-15. In use, the wire is inserted into the second contact wiring hole 2-15 and then soldered, thereby improving the reliability of the connection between the second contact terminal block 2-14 and the wire, as well as the convenience of soldering the two.

[0095] Furthermore, each group of second contact guide walls h1-42 includes a second contact guide plate h1-421, and at least one group of second contact guide walls h1-42 also includes a second contact locking block h1-422. One end of the second contact locking block h1-422 is connected to the corresponding second contact guide plate h1-422, and the other end protrudes towards the middle of the two groups of second contact guide walls h1-42. The second contact locking block h1-422 slides and limits the second contact intermediate plate 2-12, preventing the second contact 2-1 from moving away from the first bottom wall, thereby preventing the second contact 2-1 from moving away from the first bottom wall. During sliding, it disengages from between the two sets of second contact guide walls h1-42; the second contact spring stop h1-41 includes a second contact spring baffle h1-411 and a second contact spring stop block h1-412. One end of the second contact spring baffle h1-411 is connected to the first bottom wall, and the other end is provided with the second contact spring stop block h1-412. The second contact spring stop block h1-412 is disposed opposite to the first bottom wall. One end of the second contact spring 2-2 abuts against the second contact spring baffle h1-411 and is located between the second contact spring stop block h1-412 and the first bottom wall. Furthermore, both sets of second contact guide walls h1-42 are provided with second contact locking blocks h1-422. Furthermore, the second contact guide plate h1-421 of the second contact guide wall h1-42 is also provided with a step structure, the step structure includes a step horizontal surface and a step vertical surface, the step horizontal surface is arranged opposite to the first bottom wall, the second contact wiring plate 2-14 is placed on the step horizontal surface, and the second contact spring 2-2 causes one side of the second contact wiring plate 2-14 to abut against the step vertical surface.

[0096] In another embodiment of the second contact mounting structure h1-4, the second contact guide wall h1-42 does not have a second contact locking block h1-422, the second contact guide plate h1-421 has a second contact guide groove, and a pair of side edges of the second contact intermediate plate 2-12 are respectively slidably disposed in the second contact guide grooves of the two sets of second contact guide plates h1-421.

[0097] In another embodiment of the second contact 2-1, the second contact 2-1 is rotatably configured; during the process of the reset button r moving from the middle position to the latch position, the reset button r drives the first contact 1-1 to move, and at the same time, the first contact 1-1 drives the second contact 2-1 to rotate. Further, the second contact spring 2-2 is a torsion spring, a tension spring, or a compression spring.

[0098] The first contact 1-1 is either rotated or moved as a whole.

[0099] Furthermore, in this embodiment, as Figures 2-4As shown, the first contact 1-1 is preferably rotatable. Further, the switch contact system a also includes a first reset member 7, which acts on the first contact 1-1 to give it a tendency to rotate and disconnect from the second contact 2-1. When the reset button r moves from the tripped position to the middle button position, it causes the first contact 1-1 to rotate and initially contact the second contact 2-1. When the reset button r moves from the middle button position to the latched position, it drives the first contact mechanism 1 to rotate, and the first contact mechanism 1 simultaneously drives the second contact 2-1 to move. During the movement of the reset button r towards the tripped position, the second contact spring 2-2 releases energy and drives the second contact 2-1 to reset to its initial position.

[0100] Specifically, such as Figures 2-4 As shown in Figures 12-14, one implementation method is to rotate the first contact mechanism 1 and link the first contact mechanism 1 with the reset button r:

[0101] The first contact 1-1 includes a first contact contact portion 1-11 and a first contact driven portion 1-12. One end of the first contact contact portion 1-11 is bent and connected to one end of the first contact driven portion 1-12. The other end of the first contact contact portion 1-11 is provided with a first contact point 1-15 for cooperating with the second contact 2-1. The other end of the first contact driven portion 1-12 (i.e., the free end of the first contact driven portion 1-12 and the end of the first contact driven portion 1-12 away from the first contact contact portion 1-11) is in transmission cooperation with the reset button r. Furthermore, when the reset button r moves from the disengaged position to the latched position, the reset button r (specifically, the button driving part r4 of the reset button r) presses against the free end of the first contact driven part 1-12, causing the first contact 1-1 to rotate and close with the second contact 2-1. At the same time, the first contact 1-1 stores energy in the first reset member 7. When the reset button r moves from the latched position to the disengaged position, it avoids the first contact driven part 1-12, the first reset member 7 releases energy, and drives the first contact 1-1 to rotate and disconnect from the second contact 2-1. Furthermore, the first contact contact part 1-11 and the first contact driven part 1-12 are integrally L-shaped.

[0102] Furthermore, a first contact shaft hole 1-16 is provided at the bent connection between the first contact contact portion 1-11 and the first contact driven portion 1-12, through which the first contact 1-1 is rotatably mounted. Furthermore, the first half-shell h1 of the mechanism housing includes a first contact mounting shaft h1-6 disposed on its first bottom wall, through which the first contact 1-1 is rotatably mounted on the first contact mounting shaft h1-6. Furthermore, the second half-shell h2 of the mechanism housing also includes a first contact limiting post h2-6, one end of the first contact mounting shaft h1-6 is connected to the first bottom wall, and the first contact limiting post h2-6 abuts against the other end of the first contact mounting shaft h1-6. The outer diameter of the first contact limiting post h2-6 is larger than the inner diameter of the first contact shaft hole 1-16, thereby reliably limiting the first contact 1-1 on the first contact mounting shaft h1-6.

[0103] Furthermore, the first contact 1-1 further includes a first contact wiring portion 1-14, which is used to connect a wire to connect the first contact 1-1 into the corresponding circuit. The first contact wiring portion 1-14 is disposed at the bent connection between the first contact contact portion 1-11 and the first contact driven portion 1-12. Furthermore, the first contact wiring portion 1-14, the first contact contact portion 1-11, and the first contact driven portion 1-12 are integrally Y-shaped. The first contact wiring portion 1-14 is provided with a first contact wiring hole 1-18 for connecting a wire. For example, the wire can be inserted into the first contact wiring hole 1-18 and then soldered, thereby improving the reliability of the connection between the first contact wiring portion 1-14 and the wire. Furthermore, in the rotational direction of the first contact 1-1, the thickness of the first contact wiring portion 1-14 is less than or equal to the thickness of the first contact contact portion 1-11.

[0104] Furthermore, the first reset member 7 is a tension spring; the first contact 1-1 also includes a first contact connecting portion 1-13, which is disposed on the first contact contact portion 1-11. One end of the first reset member 7 is connected to the first contact connecting portion 1-13 and the other end is fixedly disposed (for example, hung on the first contact spring post h1-5 disposed on the first bottom wall). Furthermore, in the rotation axis direction of the first contact 1-1, the thickness of the first contact connecting portion 1-13 is less than the thickness of the first contact contact portion 1-11. The first contact connecting portion 1-13 is provided with a first contact spring hanging hole 1-17, and one end of the first reset member 7 is hung in the first contact spring hanging hole 1-17. Furthermore, in the rotation axis direction of the first contact 1-1, the first contact connecting portion 1-13 is located at the center position of the first contact contact portion 1-11; the first contact connecting portion 1-13 and the first contact point 1-15 are respectively located on both sides of the first contact contact portion 1-11.

[0105] In another embodiment of the first reset member 7, the first reset member 7 is a torsion spring, sleeved on the first contact mounting shaft h1-6, with one spring arm cooperating with the first contact 1-1 and the other spring arm fixed to the mechanism housing; or, the first reset member 7 is a compression spring, with one end cooperating with the first contact 1-1 and the other end cooperating with the mechanism housing.

[0106] In another embodiment where the first contact 1-1 is linked to the reset button r, the reset button r is connected to the first contact 1-1 via a transmission rod 6. Specifically, one end of the transmission rod 6 is rotatably connected to the reset button r and the other end is rotatably connected to the free end of the driven part 1-12 of the first contact.

[0107] like Figures 3-5 As shown in Figures 12-13, the reset button r includes a button head r1 and a button driving part r4. One end of the button driving part r4 is connected to the button head r1, and the other end (i.e., the free end of the button driving part r4 and the end of the button driving part r4 away from the button head r1) is in transmission cooperation with the first contact 1-1.

[0108] Specifically, the button driving part r4 extends along the moving direction of the reset button r1, and the free end of the button driving part r4 is in transmission cooperation with the first contact driven part 1-12 of the first contact 1-1.

[0109] Furthermore, the reset button r also includes a button limiting part r2 and a button locking part r3. The button limiting part r1 engages with the mechanism housing to prevent the reset button r from disengaging from the mechanism housing. One end of the button locking part r3 (button locking end r31) is used to engage with the release lever 3, and the other end is bent and connected to the button driving part r4. Furthermore, the extension direction of the button locking part r3 is perpendicular to the movement direction of the reset button r, and the button locking part r3 is perpendicularly connected to the button driving part r4. Furthermore, the button head r1, the button limiting part r2, the button locking part r3, and the button driving part r4 are connected in sequence.

[0110] like Figures 3-8 Figures 10 and 12-13 show one assembly method of the reset button r and the mechanism housing:

[0111] The button head r1 includes a button clearance groove r11 and a first button sidewall r12, a bottom button wall r14, and a second button sidewall r13 arranged sequentially around the button clearance groove r11; the first button sidewall r12 is connected to the button limiting part r2; the mechanism housing also includes a button limiting plate h1-2, which is disposed in the inner port of the button mounting hole h1-1, with one end of the button limiting plate h1-2 connected to the sidewall of the button mounting hole h1-1 and the other end inserted into the button clearance groove r11, and the button limiting plate h1-2 facing the bottom button wall r14; the button spring is a compression spring, disposed in the button clearance groove r11. The button spring / bottom wall r14 of the button is respectively engaged with the button limiting plate h1-2 and the button bottom wall r14 in the groove r11. A button head guide groove h1-11 is provided between a pair of sidewalls of the button limiting plate h1-2 and a pair of sidewalls of the button mounting hole r1-1. The first sidewall r12 and the second sidewall r13 of the button are slidably disposed in the two button head guide grooves h1-11. The button limiting part r2 is engaged with the button limiting plate h1-2 to limit the reset button r to the disengaged position. The button limiting part r2 and the button spring / bottom wall r14 are located on both sides of the button limiting plate h1-2 in the moving direction of the reset button r.

[0112] Furthermore, the first half-shell h1 of the mechanism housing includes a drive part guide groove h1-3, and the second half-shell h2 includes a drive part guide rib h2-3. The drive part guide rib h2-3 is inserted into the drive part guide groove h1-3 to form a housing guide hole h3 for the button drive part r4 to pass through, thereby limiting the button drive part r4 and preventing damage to the reliable engagement between the button drive part r4 and the first contact 1-1 and excessive swinging of the reset button r itself during operation. Further, as... Figures 10-11 As shown, in the second half-shell h2, the second release rod shaft h2-8, the first contact limiting post h2-6, and the drive part guide rib h2-3 are connected to each other by reinforcing ribs to improve structural strength.

[0113] like Figures 16-29 As shown, this is a second embodiment of the switching device of the present invention. The main difference between the switching device of this embodiment and the switching device of the first embodiment lies in the structure and working method of the power supply control mechanism.

[0114] like Figures 16-19As shown, in the power supply control mechanism of the switching device in this embodiment, the second contact mechanism 2 does not have a second contact spring 2-2, the second contact 2-1 is fixedly set, and the reset button r is in the middle position when the first contact 1-1 and the second contact 2-1 initially contact. During the process of the reset button r moving from the middle position to the latch position, the first contact mechanism 1 moves under the drive of the reset button r, the second contact 2-1 remains stationary, and the first contact mechanism 1 and the second contact 2-1 maintain a contact and conduction state.

[0115] Furthermore, such as Figures 16-19 As shown, the first contact mechanism 1 includes a first contact 1-1, a contact support 1-2, and a first contact spring 1-3. The first contact mechanism 1 is rotatably mounted via the contact support 1-2. The first contact 1-1 is movably mounted on the contact support 1-2. The first contact spring 1-3 cooperates with both the first contact 1-1 and the contact support 1-2, respectively, so that the first contact 1-1 and the contact support 1-2 are in a limited engagement and remain relatively stationary. During the process of the reset button r moving from the tripped position to the middle position, the contact support 1-2 is driven to rotate, causing the first contact 1-1 to initially contact the second contact 2-1. Then, during the process of the reset button r moving from the middle position to the latched position, the contact support 1-2 is driven to rotate relative to the first contact 1-1, causing the first contact 1-1 to initially contact the second contact 2-1. The head spring 1-3 stores energy, that is, during the process of the reset button r moving from the middle position to the latching position, it drives the contact support 1-2 to move relative to the first contact 1-1. At the same time as the contact support 1-2 and the first contact 1-1 move relative to each other, the first contact 1-3 stores energy. During the process of the reset button r moving from the middle position to the release position, the first contact spring 1-3 releases energy, causing the first contact 1-1 and the contact support 1-2 to move relative to each other and restore the limiting engagement. That is, during the process of the reset button r moving from the middle position to the release position, firstly, the switch contact spring 1-3 releases energy, causing the first contact 1-1 and the contact support 1-2 to move relative to each other and restore the limiting engagement. Then, the first contact mechanism 1 moves as a whole and disconnects from the second contact 2-1.

[0116] Specifically, such as Figures 16-19 As shown in Figure 25, this is one embodiment of the first contact mechanism 1:

[0117] The first contact mechanism 1 is rotatably mounted. Further, the first contact 1-1 is rotatably mounted on the contact support 1-2. Further, the contact support 1-2 includes a support side plate 1-21, a support connecting plate 1-22, and a first contact limiting stop 1-24. Two sets of support side plates 1-21 are arranged relatively spaced apart. The two ends of the support connecting plate 1-22 are bent and connected to the two sets of support side plates 1-21 respectively. At least one support side plate 1-21 is provided with a first contact limiting stop 1-24. The first contact 1-1 is rotatably mounted between the two sets of support side plates 1-21. A first contact spring 1-3 acts on the first contact 1-1 to limit its engagement with the first contact limiting stop 1-24, thereby keeping the first contact 1-1 and the contact support 1-2 relatively stationary. That is, when the first contact mechanism 1 moves as a whole, the first contact 1-1 and the contact support 1-2 remain relatively stationary. Furthermore, the contact support 1-2 also includes a support wiring portion 1-23. A support side plate 1-21 is provided with the support wiring portion 1-23, which is used to connect to a wire to connect the first contact mechanism 1 into the corresponding circuit. Furthermore, the support wiring portion 1-23 is provided with a support wiring hole 1-231. For example, after the wire is inserted into the support wiring hole 1-231, the support wiring portion 1-23 is connected to the wire by welding, thereby improving the reliability of the connection between the support wiring portion 1-23 and the wire. Furthermore, the contact support 1-2 is an integral structure, formed by cutting and bending a metal plate, improving the integrity and robustness of the contact support 1-2 structure.

[0118] Furthermore, the first contact 1-1 and the contact support 2-1 are coaxially rotatable. Furthermore, the first contact 1-1 includes a first contact shaft hole 1-16 at one end, and the contact support 1-2 includes a support shaft hole 1-211. Both sets of support side plates 1-21 have support shaft holes 1-211 at one end. The first contact 1-1, through the first contact shaft hole 1-16, and the contact support 1-12, through the support shaft hole 1-21, are rotatably mounted on the same rotating shaft (e.g., the first contact mounting shaft h1-6 of the first half-shell h1). Furthermore, the first contact shaft hole 1-16 and the first contact point 1-15 are respectively located at both ends of the first contact 1-1 along its length. Furthermore, the first half-shell h1 of the mechanism housing includes a first contact mounting shaft h1-6 disposed on its first bottom wall; the second half-shell h2 of the mechanism housing also includes a first contact limiting post h2-6, one end of the first contact mounting shaft h1-6 is connected to the first bottom wall, and the first contact limiting post h2-6 abuts against the other end of the first contact mounting shaft h1-6. The outer diameter of the first contact limiting post h2-6 is larger than the inner diameter of the support shaft hole 1-21, thereby reliably limiting the first contact mechanism 1 on the first contact mounting shaft h1-6.

[0119] Furthermore, the first contact spring 1-3 is a torsion spring, sleeved on the shaft of the first contact 1-1, and the first contact 1-1 is electrically connected to the contact support 1-2 through the first contact spring 1-3. Furthermore, the first contact spring 1-3 is a double torsion spring, comprising two opposing single torsion spring portions 1-31, each sleeved on the shaft of the first contact 1-1 (for example, the two single torsion spring portions 1-31 are respectively sleeved on the shaft of the first contact 1-1 via their respective helical bodies 1-311) and located on both sides of the first contact 1-1. One spring arm of each single torsion spring portion 1-31 engages with the first contact 1-1, and the other spring arm is connected and engages with the support connecting plate 1-22. Furthermore, the first contact 1-1 also includes a spring limiting block 1-19. The two spring limiting blocks 1-19 are respectively disposed on both sides of the first contact 1-1 in the rotation axis direction. One spring arm (first torsion spring arm 1-312) of the two single torsion spring parts 1-31 is located on both sides of the first contact 1-1 and cooperates with the two spring limiting blocks 1-19 respectively. The other spring arm (second torsion spring arm 1-131) of the two single torsion spring parts 1-31 is connected (for example, connected through connecting section 1-32) and cooperates with the support connecting plate 1-22.

[0120] In another embodiment of the first contact mechanism 1, the first contact mechanism 1 is rotatably configured via contact support 1-2, and the first contact 1-1 is movably configured on the contact support 1-2.

[0121] In another embodiment of the first contact mechanism 1, the first contact mechanism 1 is linearly movable via contact support 1-2, that is, the first contact mechanism 1 closes and opens with the second contact 2-1 by linear reciprocating movement. Furthermore, the first contact 1-1 can be linearly movable on the contact support 1-2, or it can be rotatably mounted on the contact support 1-2.

[0122] like Figures 16-19 As shown in Figure 23, the linkage between the reset button r and the first contact mechanism 1 is implemented as follows: The power supply control mechanism further includes a transmission rod 6. The reset button r is connected to the contact support 1-2 via the transmission rod 6. One end of the transmission rod 6 is connected to the reset button r, and the other end is rotatably connected to the contact support 1-2. That is, when the reset button r switches between the tripped and latched positions, the transmission rod 6 drives the first contact mechanism 1 to reciprocate and rotate, thereby closing and opening with the second contact 2-1. Furthermore, one end of the support side plate 1-21 of the contact support 1-2 is provided with a support connection hole 1-212. The support connection hole 1-212 and the support shaft hole 1-211 are respectively provided at both ends of the support side plate 1-21. The transmission rod 6 is rotatably connected to the support side plate 1-21 via the support connection hole 1-212.

[0123] Furthermore, the transmission rod 6 is a U-shaped transmission rod.

[0124] Furthermore, the first half-shell h1 of the mechanism housing includes a drive section guide groove h1-3, and the second half-shell h2 includes a drive section guide rib h2-3. The drive section guide rib h2-3 is inserted into the drive section guide groove h1-3 to form a housing guide hole h3 through which the transmission rod 6 passes, thereby limiting the transmission rod 6 and preventing damage to the reliable engagement between the transmission rod 6 and the first contact 1-1 and excessive oscillation of the transmission rod 6 itself during operation. Furthermore, as shown in the figure, in the second half-shell h2, the second tripping rod shaft h2-8, the first contact limiting post h2-6, and the drive section guide rib h2-3 are connected to each other by reinforcing ribs to improve structural strength.

[0125] In the switching device of this embodiment, the reset button r does not have a button drive part r4. One end of the button locking part r3 of the reset button r is used to engage with the trip lever 3, and the other end is rotatably connected to the transmission rod 6. Further, one end of the button locking part r3 is a button locking end r31 for engaging with the trip lever 3, and the other end is provided with a button connection hole r32 for the transmission rod 6 to be rotatably inserted into.

[0126] In another embodiment where the reset button r is linked to the first contact mechanism 1, the reset button r is provided with a button driving part r4, and the power supply control mechanism includes a second reset member acting on the contact support 1-2; during the process of the reset button r moving to the latching position, the button driving part r4 presses against the contact support 1-2 to rotate the first contact mechanism 1 and close the first contact 1-1 and the second contact 2-1; during the process of the reset button r moving to the disengaged position, the button driving part r4 avoids the contact support 1-2, and the second reset member drives the first contact mechanism 1 to rotate and disconnect the first contact 1-1 and the second contact 2-1.

[0127] Specifically, such as Figures 16-22 As shown in Figure 29, this is how the second contact 2 is fixedly installed:

[0128] The second contact 2-1 is fixedly installed by cooperating with the second contact mounting structure h1-4.

[0129] Furthermore, the second contact mounting structure h1-4 includes a second contact hook h1-44, a first side baffle h1-45, a second side baffle h1-46, and a second contact limiting stop h1-43. The first side baffle h1-45 and the second side baffle h1-46 are arranged opposite to each other, and the second contact hook h1-44 and the second contact limiting stop h1-43 are arranged opposite to each other. The second contact hook h1-44 includes a hook arm and a hook part. One end of the hook arm is connected to the first bottom wall and the other end is connected to the hook part. The second contact 2-1 includes a second contact contact plate 2-11, a second contact intermediate plate 2-12, and a second contact wiring plate 2-14. The second contact contact plate 2-11 is used to close and open with the first contact 1-1. One end of the second contact contact plate 2-11 is connected to the second contact. One end of the intermediate plate 2-12 is bent and connected, and the other end of the second contact plate 2-11 is limited and fixedly abutted against the first bottom wall by the second contact limiting stop h1-43. The other end of the intermediate plate 2-12 is bent and connected to the second contact wiring plate 2-14, and the intermediate plate 2-12 and the second contact wiring plate 2-14 are coplanar. The second contact plate 2-11 is located between the first side baffle h1-45 and the second side baffle h1-46 and is limited and matched with both respectively. The second contact wiring plate 2-14 is opposite to the first bottom wall and abuts against the second side baffle h1-46. The hook arm abuts against the end of the second contact plate 2-12 away from the second contact plate 2-11, and the hook part is locked on the side of the second contact plate 2-12 away from the first bottom wall. Furthermore, the second contact mounting structure h1-4 also includes a second contact stop h1-47, which is located between the first side baffle h1-45 and the second side baffle h1-46. The free end of the second contact plate 2-11 (i.e., the end of the second contact plate 2-11 that abuts against the first bottom wall) is inserted between the second contact stop h1-47 and the second contact limiting stop h1-43 and respectively limits and cooperates with them, further improving the installation reliability and stability of the second contact 2-1. Furthermore, the second contact wiring plate 2-14 and the second contact intermediate plate 2-12 are integrally formed into an L-shaped plate structure.

[0130] As another embodiment of the second contact mounting structure h1-4, the second contact mounting structure h1-4 does not have a second contact limiting stop h1-43, and the first side baffle h1-45 and the second side baffle h1-46 are provided with contact plate limiting grooves for a pair of sides of the second contact contact plate 2-11 to be inserted.

[0131] It should be noted that in the description of this invention, 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 conventionally placed during use. They are used only for ease of description and do not indicate that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating relative importance.

[0132] 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 scope of protection of the present invention.

Claims

1. A power supply control mechanism, comprising a reset button (r) having a latching position and a tripping position, a tripping lever (3), a tripping device (4), a control module electrically connected with the tripping device (4) through a connecting circuit, and a switch contact system (a) connected in series in the connecting circuit; the reset button (r) is used to latch with the tripping lever (3) in the latching position, to move to the tripping position after unlatching with the tripping lever (3), and to drive the tripping device (4) to reset and recover the latching with the tripping lever (3) through the tripping lever (3) when moving from the tripping position to the latching position; the control module is used to take power from a main circuit of a switch electric appliance and to control the tripping device (4) to act according to a signal, the tripping lever (3) is driven to move by the tripping device (4) and is used to drive an operating mechanism of the switch electric appliance to trip and to unlatch the reset button (r) with the tripping lever (3); the switch contact system (a) is turned on or turned off when the reset button (r) is in the latching position or the tripping position. characterized in that The switch contact system (a) comprises a first contact mechanism (1) and a second contact mechanism (2) linked with the reset button (r), the first contact mechanism (1) comprises a first contact (1-1), and the second contact mechanism (2) comprises a second contact (2-1); the first contact mechanism (1) is moved to make the first contact (1-1) close to the second contact (2-1) in the process of the reset button (r) moving to the latching position; the first contact mechanism (1) is moved to make the first contact (1-1) open from the second contact (2-1) in the process of the reset button (r) moving to the tripping position; the first contact (1-1) and the second contact (2-1) are rigid structures.

2. The power supply control mechanism according to claim 1, characterized by: The first contact (1-1) and the second contact (2-1) are in contact and turned on when or before the reset button (r) moves to the latching position.

3. The power supply control mechanism of claim 2, wherein: The first contact (1-1) and the second contact (2-1) are in contact and turned on before the reset button (r) moves to the latching position; the reset button (r) is in a button intermediate position when the first contact (1-1) and the second contact (2-1) are initially in contact, the first contact mechanism (1) and / or the second contact (2-1) are moved under the drive of the reset button (r) and the first contact (1-1) and the second contact (2-1) remain in the contact and turned on state in the process of the reset button (r) continuously moving to the latching position.

4. The power supply control mechanism of claim 3, wherein: The second contact mechanism (2) further comprises a second contact spring (2-2) acting on the second contact (2-1) to keep it in a first position; the reset button (r) is moved from the tripping position to the button intermediate position to make the first contact (1-1) and the second contact (2-1) initially in contact, the second contact spring (2-2) is driven to move by the first contact mechanism (1) and is energized in the process of the reset button (r) continuously moving to the latching position; the second contact spring (2-2) is de-energized to drive the second contact (2-1) to reset to the first position in the process of the reset button (r) moving to the tripping position.

5. The power supply control mechanism of claim 4, wherein: The second contact (2-1) is integrally movably arranged or rotatably arranged.

6. The power supply control mechanism of claim 5, wherein: The second contact (2-1) is integrally movably arranged, and the second contact spring (2-2) is a compression spring, one end of which is fixedly arranged and the other end of which is matched with the second contact (2-1).

7. The power supply control mechanism of claim 6, wherein: The power supply control mechanism further comprises a mechanism shell, the mechanism shell comprising a second contact mounting structure (h1-4) arranged on a first bottom wall thereof, the second contact mounting structure (h1-4) comprising a second contact spring stop (h1-41), a second contact guide wall (h1-42) and a second contact limiting stop (h1-43), the two groups of second contact guide walls (h1-42) being oppositely arranged, the second contact (2-1) being slidably arranged between the two groups of second contact guide walls (h1-42) and being guided and limitedly matched with the two groups of second contact guide walls (h1-42) respectively, the second contact spring stop (h1-41) being oppositely arranged with the second contact limiting stop (h1-43), one end of the second contact spring (2-2) being matched with the second contact spring stop (h1-41) and the other end being matched with the second contact (2-1), and the second contact spring (2-2) being limitedly matched with the second contact limiting stop (h1-43) for the second contact (2-1).

8. The power supply control mechanism of claim 4, wherein: The first contact (1-1) is rotatably arranged and comprises a first contact contact part (1-11) and a first contact driven part (1-12), one end of the first contact contact part (1-11) being connected with one end of the first contact driven part (1-12) by bending, the other end of the first contact contact part (1-11) being provided with a first contact point (1-15) for matching with the second contact (2-1), and the other end of the first contact driven part (1-12) being transmissionally matched with the reset button (r).

9. The power supply control mechanism of claim 8, wherein: The bending connection position of the first contact contact part (1-11) and the first contact driven part (1-12) is provided with a first contact shaft hole (1-16), and the first contact (1-1) is rotatably arranged through the first contact shaft hole (1-16). The switch contact system (a) further comprises a first reset member (7) which acts on the first contact (1-1) to make the first contact (1-1) have a movement tendency of rotating to be disconnected with the second contact (2-1); in the process that the reset button (r) moves to the latching position, the first contact (1-1) is driven to rotate to be connected with the second contact (2-1), and at the same time, the first contact (1-1) stores energy for the first reset member (7); in the process that the reset button (r) moves to the tripping position, the first reset member (7) releases energy to drive the first contact (1-1) to rotate to be disconnected with the second contact (2-1); The power supply control mechanism further comprises a mechanism shell, the mechanism shell comprises a button mounting hole (h1-2); the reset button (r) is integrally movably arranged and comprises a button head (r1), a button limiting portion (r2), a button locking portion (r3) and a button driving portion (r4), the button head (r1) is slidably arranged in the button mounting hole (h1-2) and protrudes from the mechanism shell at one end for external force operation, the button limiting portion (r2) is limitedly matched with the mechanism shell to prevent the reset button (r) from being pulled out of the mechanism shell, one end of the button locking portion (r3) is used for snap-fit matching with the trip lever (3) and the other end is connected with one end of the button driving portion (r4) through bending, one end of the button driving portion (r4) is used for transmission matching with the first contact driven portion (1-12), and the extension direction of the button driving portion (r4) is the same as the moving direction of the reset button (r); The mechanism shell comprises a first half shell (h1) and a second half shell (h2) which are relatively combined together; the first half shell (h1) comprises a driving portion guide groove (h1-3), and the second half shell (h2) comprises a driving portion guide rib (h2-3), the driving portion guide rib (h2-3) is inserted into the driving portion guide groove (h1-3) to form a shell guide hole (h3) for the button driving portion (r4) to pass through; The first half shell (h1) further comprises a first contact mounting shaft (h1-6), one end of the first contact mounting shaft (h1-6) is connected with the first half shell (h1), and the first contact (1-1) is rotatably mounted on the first contact mounting shaft (h1-6) through a first contact shaft hole (1-16) of the first contact (1-1); the second half shell (h2) further comprises a first contact limiting column (h2-6), the first contact limiting column (h2-6) abuts against the other end of the first contact mounting shaft (h1-6), and the outer diameter of the first contact limiting column (h2-6) is greater than the inner diameter of the first contact shaft hole (1-16); The first half shell (h1) further comprises a first trip lever shaft hole (h1-8), and the second half shell (h2) further comprises a second trip lever shaft column (h2-8), the second trip lever shaft column (h2-8) is provided with a second trip lever shaft hole (h2-80), and both ends of the rotating shaft of the trip lever (3) are rotatably inserted into the first trip lever shaft hole (h1-8) and the second trip lever shaft hole (h2-80) respectively; The second trip lever shaft column (h2-8), the first contact limiting column (h2-6) and the driving portion guide rib (h2-3) are connected with each other through reinforcing ribs respectively. The second contact (2-1) is fixedly arranged; the first contact mechanism (1) comprises a first contact (1-1), a contact support (1-2) and a first contact spring (1-3), the first contact mechanism (1) is rotatably arranged through the contact support (1-2), the first contact (1-1) is movably arranged on the contact support (1-2), and the first contact spring (1-3) is matched with the first contact (1-1) and the contact support (1-2) respectively, so that the first contact (1-1) is limitedly matched with the contact support (1-2) and kept relatively static; in the process that the reset button (r) moves from the tripping position to the button intermediate position, the contact support (1-2) is driven to rotate to drive the first contact (1-1) to initially contact the second contact (2-1), in the process that the reset button (r) moves from the button intermediate position to the tripping position, the contact support (1-2) is driven to move relatively to the first contact (1-1) and the first contact spring (1-3) is stored with energy; in the process that the reset button (r) moves from the button intermediate position to the tripping position, the first contact spring (1-3) releases energy to drive the first contact (1-1) to move relatively to the contact support (1-2) and restore the limited matching; The first contact (1-1) is rotatably arranged on the contact support (1-2); the first contact (1-1) is electrically connected with the contact support (1-2) through the first contact spring (1-3); The power supply control mechanism further comprises a transmission rod (6), one end of the transmission rod (6) is rotatably connected with the reset button (r) and the other end is rotatably connected with the contact support (1-2); The power supply control mechanism further comprises a mechanism shell, the mechanism shell comprises a button mounting hole (h1-2); the reset button (r) is movably arranged as a whole and comprises a button head (r1), a button limiting part (r2) and a button lock part (r3), the button head (r1) is slidably arranged in the button mounting hole (h1-2) and protrudes from the mechanism shell at one end for external force operation, the button limiting part (r2) is limitedly matched with the mechanism shell to prevent the reset button (r) from being pulled out, the extension direction of the button lock part (r3) is perpendicular to the movement direction of the reset button (r), one end of the button lock part (r3) is used for being buckled with the tripping rod (3) and the other end is rotatably connected with the transmission rod (6); The mechanism shell comprises a first half shell (h1) and a second half shell (h2) which are relatively combined together; the first half shell (h1) comprises a driving part guide groove (h1-3), the second half shell (h2) comprises a driving part guide rib (h2-3), and the driving part guide rib (h2-3) is inserted into the driving part guide groove (h1-3) to form a shell guide hole (h3) through which the transmission rod (6) passes; The first half shell (h1) further comprises a first contact mounting shaft (h1-6) connected to the first half shell (h1) at one end, and the first contact mechanism (1) is rotatably mounted on the first contact mounting shaft (h1-6) through the first contact shaft hole (1-16) thereof; the second half shell (h2) further comprises a first contact limiting column (h2-6) abutting against the other end of the first contact mounting shaft (h1-6), and the outer diameter of the first contact limiting column (h2-6) is greater than the inner diameter of the first contact shaft hole (1-16); The first half shell (h1) further comprises a first trip lever shaft hole (h1-8), and the second half shell (h2) further comprises a second trip lever shaft column (h2-8) provided with a second trip lever shaft hole (h2-80), and the two ends of the rotating shaft of the trip lever (3) are rotatably inserted into the first trip lever shaft hole (h1-8) and the second trip lever shaft hole (h2-8) respectively; The second trip lever shaft column (h2-8), the first contact limiting column (h2-6) and the driving part guide rib (h2-3) are connected to each other through reinforcing ribs respectively.

10. A switchgear, characterized by: The switch device comprises the power supply control mechanism according to any one of claims 1-9.

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