Dual-power change-over switch

Abstract

A dual-power change-over switch comprises a first static contact; a second static contact; a first moving contact; a second moving contact; the opening spring is configured to provide bias force for the first moving contact to rotate from the first closed position to the first separated position along the first direction and the second moving contact to rotate from the second closed position to the second separated position along the second direction opposite to the first direction; and the closing spring is configured to provide a bias force for the first moving contact to rotate from the first separation position to the first closing position along the second direction and the second moving contact to rotate from the second separation position to the second closing position along the first direction, and when one of the opening spring and the closing spring is in a state of applying the bias force to the first moving contact, the first moving contact is separated from the second separation position. And the other one of the opening spring and the closing spring is separated from the state of applying the bias force to the first moving contact.

Description

Technical Field

[0001] This application relates to a dual power supply transfer switch. Background Technology

[0002] A key performance characteristic of dual power transfer switches is their switching speed. Faster switching speeds result in shorter power outage times, which is especially important for critical loads. However, the switching time of traditional mechanical dual power transfer switches is typically 500ms when driven by an electromagnet, and several seconds when driven by a motor.

[0003] Therefore, a dual power supply transfer switch that can switch quickly is needed. Summary of the Invention

[0004] Therefore, to solve the above problems, this application provides a dual-power transfer switch, which can switch between a dual-position, a first power-on position, and a second power-on position. The dual-power transfer switch includes: a frame; a first stationary contact mounted on the frame and electrically connected to a first power source; a second stationary contact mounted on the frame and electrically connected to a second power source; a first moving contact mounted on the frame and configured to rotate between a first closed position in contact with the first stationary contact and a first open position separated from the first stationary contact; and a second moving contact mounted on the frame and configured to rotate between the second stationary contact and the second power source. The circuit includes a second closed position where the stationary contact is in contact with the second open position and a second open position where the stationary contact is separated from the second stationary contact; a tripping spring, mounted on the frame, configured to provide a biasing force for the first moving contact to rotate from the first closed position to the first open position along a first direction and for the second moving contact to rotate from the second closed position to the second open position along a second direction opposite to the first direction; and a closing spring, mounted on the frame, configured to provide a biasing force for the first moving contact to rotate from the first open position to the first closed position along a second direction and for the second moving contact to rotate from the second open position to the second closed position along a first direction.

[0005] When one of the opening spring and the closing spring is in a state of applying a biasing force to the first moving contact, the other of the opening spring and the closing spring is out of the state of applying a biasing force to the first moving contact.

[0006] When one of the opening spring and the closing spring is in a state of applying a biasing force to the second moving contact, the other of the opening spring and the closing spring is out of the state of applying a biasing force to the second moving contact.

[0007] Advantageously, in the first power-on position, the first moving contact is in contact with the first stationary contact, the second moving contact is separated from the second stationary contact, the opening spring is in a state capable of applying a biasing force along the first direction to the first moving contact, and the closing spring is in a state capable of applying a biasing force along the first direction to the second moving contact.

[0008] In the second power-on position, the second moving contact is in contact with the second stationary contact, the first moving contact is separated from the first stationary contact, the opening spring is in a state that can apply a biasing force along the second direction to the second moving contact, and the closing spring is in a state that can apply a biasing force along the second direction to the second moving contact.

[0009] Advantageously, in the first power-on position, during the switching of the dual power transfer switch from the first power-on position to the second power-on position, the biasing force of the opening spring drives the first moving contact to move along the first direction to the first open position, thereby switching the dual power transfer switch to the double open position. Then, the biasing force of the closing spring drives the second moving contact to move along the first direction to the second closed position and contact the second stationary contact, thereby switching the dual power transfer switch to the second power-on position.

[0010] Advantageously, in the second power-on position, during the switching of the dual power transfer switch from the second power-on position to the first power-on position, the biasing force of the opening spring drives the second moving contact to move to the second disengaged position along a second direction opposite to the first direction, thereby switching the dual power transfer switch to the dual-disengaged position. Then, the biasing force of the closing spring drives the first moving contact to move to the first closed position along the second direction and contact the first stationary contact, thereby switching the dual power transfer switch to the first power-on position.

[0011] Advantageously, it also includes a reset disk mounted on the rack, which is configured to drive the closing and opening springs to store energy after the dual power supply switch has switched from the first power-on position through the dual-open position to the second power-on position.

[0012] After the dual power supply transfer switch switches from the second power-on position through the dual-open position to the first power-on position, the reset plate is configured to drive the closing spring and the opening spring to store energy, so that the bias force of the closing spring and the bias force of the opening spring are both directed in the first direction.

[0013] Advantageously, it also includes a closing guide mechanism mounted on the frame, the closing spring being mounted on the closing guide mechanism, the closing guide mechanism comprising:

[0014] The first guide rod is pivotally mounted on the frame via a first pivot pin;

[0015] The second guide rod is pivotally connected to the first guide rod via a second pivot pin. The second guide rod has a first groove extending along a portion of its length. A first retaining pin passes through the first groove and is fixedly mounted to the frame. One end of the closing spring is connected to the second pivot pin, and the other end is connected to the first retaining pin.

[0016] Advantageously, it also includes a tripping guide mechanism mounted on the frame, the tripping spring being mounted on the tripping guide mechanism, the tripping guide mechanism comprising:

[0017] The third guide rod is pivotally mounted on the frame via the first pivot pin;

[0018] The fourth guide rod is pivotally connected to the third guide rod via the third pivot pin. The fourth guide rod has a second groove extending along a portion of its length. The second retaining pin passes through the second groove and is fixedly mounted to the frame. One end of the trip spring is connected to the third pivot pin, and the other end is connected to the second retaining pin.

[0019] Advantageously, the reset disk is pivotally mounted on the frame via a first pivot pin, the reset disk having a first profile that mates with a second pivot pin and a second profile that mates with a third pivot pin.

[0020] After the dual power supply transfer switch switches from the first power-on position through the dual-disconnect position to the second power-on position, the reset plate is configured to pivot in the second direction, such that the first contour abuts against and pushes the second pivot pin, and the second contour abuts against and pushes the third pivot pin. As a result, the second guide rod rotates around the first fixed pin so that the bias force applied by the closing spring is directed towards the second direction, and the third guide rod rotates around the second fixed pin so that the bias force applied by the disconnect spring is directed towards the second direction.

[0021] Advantageously, it also includes a first stop mechanism and a second stop mechanism, the first stop mechanism being configured to abut against a second pivot pin to retain the closing spring when the biasing force of the closing spring is directed in a first direction, and the second stop mechanism being configured to abut against a second pivot pin to retain the closing spring when the biasing force of the closing spring is directed in a second direction.

[0022] Advantageously, it also includes a third stop mechanism and a fourth stop mechanism, the third stop mechanism being configured to abut against a third pivot pin to hold the opening spring when the biasing force of the opening spring is directed in a first direction, and the fourth stop mechanism being configured to abut against a second pivot pin to hold the opening spring when the biasing force of the opening spring is directed in a second direction. Attached Figure Description

[0023] The above and other features and advantages of exemplary embodiments of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, which are for illustrative purposes only and are not intended to limit the scope of the invention in any way, wherein:

[0024] Figure 1 A schematic diagram of a dual power supply transfer switch according to this application is shown, wherein the dual power supply transfer switch is in the first power-on position.

[0025] Figure 2A schematic diagram of a dual power supply changeover switch according to this application is shown. At this time, the dual power supply changeover switch begins to switch from the first power-on position to the second power-on position, that is, the first locking mechanism that locks the first moving contact is unlocked.

[0026] Figure 3 A schematic diagram of a dual power supply transfer switch according to this application is shown. At this time, the dual power supply transfer switch is in the dual open position, and the first stop mechanism holds the closing spring, preventing the closing spring from releasing energy.

[0027] Figure 4 A schematic diagram of a dual power supply transfer switch according to this application is shown. At this time, the dual power supply transfer switch is in the open position, and the first stop mechanism releases the closing spring, allowing the closing spring to release energy.

[0028] Figure 5 A schematic diagram of a dual power supply changeover switch according to this application is shown. In this case, the power supply changeover switch is switched to the second power-on position, and the second locking mechanism locks the second moving contact.

[0029] Figure 6 A schematic diagram of a dual-power transfer switch according to this application is shown, in which the closing spring and the opening spring rotate under the action of the drive disc so that the bias force applied by the closing spring and the opening spring is directed toward the second direction.

[0030] Figure 7 The diagram shows perspective views of the closing spring and the opening spring respectively mounted on the closing guide mechanism and the opening guide mechanism.

[0031] Figures 8(a) to 8(d) It is shown that after switching from the first power-on position to the second power-on position, the drive disk drives the closing spring and the opening spring to rotate so that the applied bias force is directed toward the second direction.

[0032] Figures 9(a) to 9(d) It is shown that after switching from the second power-on position to the first power-on position, the drive disk drives the closing spring and the opening spring to rotate so that the applied bias force is directed toward the first direction. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0034] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of this disclosure may have fewer components, other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0035] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Where the number of components is not specified, the number of components may be one or more; similarly, the terms “a,” “the,” “described,” and similar terms do not necessarily indicate a quantity limitation. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. The terms “install,” “set,” “connect,” or “link,” and similar terms are not limited to physical or mechanical installation, setting, or connection, but may include electrical installation, setting, or connection, whether direct or indirect. “Above,” “below,” “left,” “right,” etc., are used only to indicate the relative positional relationship of the equipment during use or the positional relationship shown in the accompanying drawings; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] The dual power transfer switch is capable of switching between a dual-position, a first power-on position, and a second power-on position. The dual power transfer switch includes a frame (not shown), a first stationary contact 1 fixedly mounted on the frame and electrically connected to a first power source, and a second stationary contact 2 fixedly mounted on the frame and electrically connected to a second power source. A first moving contact 3 is mounted on the frame and configured to rotate between a first closed position in contact with the first stationary contact and a first open position separated from the first stationary contact. A second moving contact 4 is mounted on the frame and configured to rotate between a second closed position in contact with the second stationary contact and a second open position separated from the second stationary contact.

[0037] The opening spring 5 is mounted on the frame and configured to provide a biasing force for the first moving contact to rotate from the first closed position to the first open position along a first direction, and also to provide a biasing force for the second moving contact to rotate from the second closed position to the second open position along a second direction opposite to the first direction.

[0038] The closing spring 6 is mounted on the frame and configured to provide a biasing force for the first moving contact to rotate from the first disengaged position to the first closed position along the second direction, and also to provide a biasing force for the second moving contact to rotate from the second disengaged position to the second closed position along the first direction.

[0039] When one of the opening spring 5 and the closing spring 6 is in a state of applying a biasing force to the first moving contact, the other of the opening spring and the closing spring is out of the state of applying a biasing force to the first moving contact. When one of the opening spring 5 and the closing spring 6 is in a state of applying a biasing force to the second moving contact, the other of the opening spring and the closing spring is out of the state of applying a biasing force to the second moving contact. In other words, the opening spring 5 and the closing spring 6 cannot simultaneously apply a biasing force to the first moving contact or the second moving contact, thereby avoiding mutual resistance between the opening spring 5 and the closing spring 6.

[0040] Figure 1 A schematic diagram of the dual power supply changeover switch according to this application is shown. In this position, the dual power supply changeover switch is in the first power-on position, i.e., the first moving contact 3 is in contact with the first stationary contact 1, and the second moving contact 4 is separated from the second stationary contact 2. At this time, the opening spring is in a state capable of applying a biasing force along the first direction (counterclockwise in the figure) to the first moving contact, and the closing spring is in a state capable of applying a biasing force along the first direction to the second moving contact.

[0041] During the switching of the dual power supply transfer switch from the first power-on position to the second power-on position, firstly, the first locking mechanism 32 unlocks the first moving contact 3, thereby allowing the first moving contact to rotate, as... Figure 2 As shown. Next, the opening spring 5 releases energy, thereby pushing the first moving contact 3 to rotate in the first direction to the first disengagement position. Preferably, the opening spring 5 pushes the first moving contact bracket 31, which is fixedly mounted to the first moving contact, thereby causing the first moving contact to rotate. Figure 3 The dual power supply transfer switch is shown in the open position. At this time, the first stop mechanism 61 blocks the closing spring, preventing the closing spring from releasing energy. Then, as... Figure 4 As shown, the first stop mechanism 61 releases the closing spring, allowing the closing spring to release energy. Then, the closing spring 6 releases energy, thereby pushing the second moving contact 4 to rotate in the first direction to the first closed position. The second locking mechanism 42 locks the second moving contact 4, as shown. Figure 5 As shown. Preferably, the closing spring 6 pushes against the second moving contact bracket 41, which is fixedly mounted to the second moving contact, thereby causing the second moving contact to rotate.

[0042] The dual power supply transfer switch also includes a reset disk 7 mounted on the rack. After the dual power supply transfer switch switches from the first power-on position through the dual-open position to the second power-on position, the reset disk is configured to drive the closing spring and the opening spring to store energy, such that the biasing force of the closing spring and the biasing force of the opening spring are both directed in the second direction. Figure 6 As shown.

[0043] It can be envisioned that during the switching of the dual power transfer switch from the second power-on position to the first power-on position, the biasing force of the opening spring drives the second moving contact to move to the second open position along a second direction opposite to the first direction, thereby switching the dual power transfer switch to the double open position. Then, the biasing force of the closing spring drives the first moving contact to move to the first closed position along the second direction, contacting the first stationary contact, thereby switching the dual power transfer switch to the first power-on position. The switching of the dual power transfer switch from the second power-on position to the first power-on position is the reverse of the switching from the first power-on position to the second power-on position, and will not be described in detail here.

[0044] Similarly, there are also a third stop mechanism and a fourth stop mechanism. The third stop mechanism is configured to abut against the third pivot pin to hold the brake spring in place when the biasing force of the brake spring is directed in the first direction. The fourth stop mechanism is configured to abut against the second pivot pin to hold the brake spring in place when the biasing force of the brake spring is directed in the second direction. The functions of the third and fourth stop mechanisms are the same as those of the first and second stop mechanisms, and will not be described in detail here.

[0045] The specific forms of the first, second, third, and fourth stop mechanisms can be conceived by those skilled in the art as needed, as long as their functions can be realized.

[0046] After the dual power supply transfer switch switches from the second power-on position through the dual-open position to the first power-on position, the reset plate is configured to drive the closing spring and the opening spring to store energy, so that the bias force of the closing spring and the bias force of the opening spring are both directed in the first direction.

[0047] The dual power transfer switch also includes a closing guide mechanism 8 mounted on a frame. A closing spring is mounted on the closing guide mechanism, which includes a first guide rod 81 pivotally mounted on the frame via a first pivot pin 82; a second guide rod 83 pivotally connected to the first guide rod 81 via a second pivot pin 84; the second guide rod 83 has a first groove 85 extending along a portion of its length; a first fixing pin 86 passes through the first groove 85 and is fixedly mounted to the frame; one end of the closing spring is connected to the second pivot pin, and the other end is connected to the first fixing pin.

[0048] Thus, the second guide rod can rotate around the first fixing pin 86, and due to the cooperation between the first fixing pin 86 and the first groove 85, the second guide rod can also move relative to the first fixing pin 86, thereby enabling the closing spring 6 to store and release energy.

[0049] The dual power transfer switch also includes a tripping guide mechanism 9 mounted on a frame, a tripping spring 5 mounted on the tripping guide mechanism, the tripping guide mechanism including a third guide rod 91 pivotally mounted on the frame via a first pivot pin 82; a fourth guide rod 92 pivotally connected to the third guide rod 91 via a third pivot pin 93, the fourth guide rod 92 having a second groove 94 extending along a portion of its length, a second fixing pin 95 passing through the second groove 94 and fixedly mounted to the frame, one end of the tripping spring being connected to the third pivot pin and the other end being connected to the second fixing pin.

[0050] Thus, the fourth guide rod can rotate around the second fixed pin 95, and due to the cooperation of the second fixed pin 95 and the second groove 94, the fourth guide rod can also move relative to the second fixed pin 95, thereby enabling the opening gate spring 5 to store and release energy.

[0051] The reset disk 7 is pivotally mounted on the frame via a first pivot pin 82, the reset disk having a first profile 71 that engages with a second pivot pin 84 and a second profile 72 that engages with a third pivot pin.

[0052] After the dual power supply transfer switch switches from the first power-on position through the dual-position to the second power-on position, as follows: Figures 8(a) to 8(d) As shown, the reset plate 7 is configured to pivot in the second direction, such that the first contour 71 abuts against and pushes the second pivot pin 4, and the second contour abuts against and pushes the third pivot pin, thereby causing the second guide rod to rotate around the first fixed pin 86 so that the biasing force applied by the closing spring is directed toward the second direction, and the third guide rod to rotate around the second fixed pin 95 so that the biasing force applied by the opening spring is directed toward the second direction.

[0053] Similarly, after the dual power supply transfer switch switches from the second power-on position through the dual-position to the first power-on position, as follows: Figures 9(a) to 9(d) As shown, the reset plate is configured to pivot in a first direction, such that the first contour abuts against and pushes the second pivot pin, and the second contour abuts against and pushes the third pivot pin, thereby causing the second guide rod to rotate about the first fixed pin so that the biasing force applied by the closing spring is directed toward the first direction, and the third guide rod to rotate about the second fixed pin so that the biasing force applied by the opening spring is directed toward the first direction.

[0054] The dual-power transfer switch of this application uses a closing spring for closing the circuit and an opening spring for opening the circuit, enabling rapid closing and opening. Furthermore, the closing and opening springs do not oppose each other when releasing energy, resulting in even faster closing and opening; for example, this application achieves a switching time of 10ms. In addition, the drive panel implements interlocking and error prevention for the closing and opening springs, completely preventing them from opposing each other.

[0055] Although the present invention has been described in the specification and illustrated in the accompanying drawings with reference to various embodiments, those skilled in the art will understand that the above embodiments are merely preferred embodiments, and some technical features in the embodiments may not be necessary for solving specific technical problems, so these technical features may be omitted or omitted without affecting the solution of the technical problem or the formation of the technical solution; moreover, the features, elements and / or functions of one embodiment may be appropriately combined, combined or coordinated with the features, elements and / or functions of one or more other embodiments, unless such combination, combination or coordination is obviously not feasible.

Claims

1. A dual-power transfer switch, capable of switching between a dual-off position, a first power-on position, and a second power-on position, wherein, The dual power supply transfer switch includes: frame, The first stationary contact is mounted on the frame and electrically connected to the first power supply. The second stationary contact is mounted on the frame and electrically connected to the second power supply. The first moving contact is mounted on the frame and configured to rotate between a first closed position in contact with the first stationary contact and a first separated position away from the first stationary contact; The second moving contact is mounted on the frame and configured to rotate between a second closed position in contact with the second stationary contact and a second open position separated from the second stationary contact; The opening spring is mounted on the frame and configured to provide a biasing force for the first moving contact to rotate from the first closed position to the first open position along a first direction and for the second moving contact to rotate from the second closed position to the second open position along a second direction opposite to the first direction. A closing spring, mounted on a frame, is configured to provide a biasing force for the first moving contact to rotate from a first disengaged position to a first closed position along a second direction and for the second moving contact to rotate from a second disengaged position to a second closed position along a first direction. When one of the opening spring and the closing spring is in a state of applying a biasing force to the first moving contact, the other of the opening spring and the closing spring is out of the state of applying a biasing force to the first moving contact. When one of the opening spring and the closing spring is in a state of applying a biasing force to the second moving contact, the other of the opening spring and the closing spring is out of the state of applying a biasing force to the second moving contact.

2. The dual power supply transfer switch as described in claim 1, wherein, In the first power-on position, the first moving contact is in contact with the first stationary contact, the second moving contact is separated from the second stationary contact, the opening spring is in a state capable of applying a biasing force along the first direction to the first moving contact, and the closing spring is in a state capable of applying a biasing force along the first direction to the second moving contact. In the second power-on position, the second moving contact is in contact with the second stationary contact, the first moving contact is separated from the first stationary contact, the opening spring is in a state that can apply a biasing force along the second direction to the second moving contact, and the closing spring is in a state that can apply a biasing force along the second direction to the second moving contact.

3. The dual power supply transfer switch as described in claim 1, wherein, In the first power-on position, during the switching of the dual power transfer switch from the first power-on position to the second power-on position, the biasing force of the opening spring drives the first moving contact to move along the first direction to the first separated position, thereby switching the dual power transfer switch to the double open position. Then, the biasing force of the closing spring drives the second moving contact to move along the first direction to the second closed position and contact the second stationary contact, thereby switching the dual power transfer switch to the second power-on position.

4. The dual power supply transfer switch as described in claim 3, wherein, In the second power-on position, during the switching of the dual power transfer switch from the second power-on position to the first power-on position, the biasing force of the opening spring drives the second moving contact to move to the second separated position along a second direction opposite to the first direction, thereby switching the dual power transfer switch to the double-open position. Then, the biasing force of the closing spring drives the first moving contact to move to the first closed position along the second direction and contact the first stationary contact, thereby switching the dual power transfer switch to the first power-on position.

5. The dual power supply transfer switch as described in claim 4, wherein, It also includes a reset plate mounted on the rack. After the dual power supply transfer switch switches from the first power-on position through the dual-open position to the second power-on position, the reset plate is configured to drive the closing spring and the opening spring to store energy, so that the bias force of the closing spring and the bias force of the opening spring are both directed in the second direction. After the dual power supply transfer switch switches from the second power-on position through the dual-open position to the first power-on position, the reset plate is configured to drive the closing spring and the opening spring to store energy, so that the bias force of the closing spring and the bias force of the opening spring are both directed in the first direction.

6. The dual power supply transfer switch as described in claim 5, wherein, It also includes a closing guide mechanism mounted on the frame, wherein the closing spring is mounted on the closing guide mechanism, and the closing guide mechanism includes: The first guide rod is pivotally mounted on the frame via a first pivot pin; The second guide rod is pivotally connected to the first guide rod via a second pivot pin. The second guide rod has a first groove extending along a portion of its length. A first retaining pin passes through the first groove and is fixedly mounted to the frame. One end of the closing spring is connected to the second pivot pin, and the other end is connected to the first retaining pin.

7. The dual power supply transfer switch as described in claim 6, wherein, It also includes a tripping guide mechanism mounted on the frame, wherein the tripping spring is mounted on the tripping guide mechanism, and the tripping guide mechanism includes: The third guide rod is pivotally mounted on the frame via the first pivot pin; The fourth guide rod is pivotally connected to the third guide rod via the third pivot pin. The fourth guide rod has a second groove extending along a portion of its length. The second retaining pin passes through the second groove and is fixedly mounted to the frame. One end of the trip spring is connected to the third pivot pin, and the other end is connected to the second retaining pin.

8. The dual power supply transfer switch as described in claim 5, wherein, The reset disk is pivotally mounted on the frame via a first pivot pin, the reset disk having a first profile that mates with a second pivot pin and a second profile that mates with a third pivot pin. After the dual power supply transfer switch switches from the first power-on position through the dual-disconnect position to the second power-on position, the reset plate is configured to pivot in the second direction, such that the first contour abuts against and pushes the second pivot pin, and the second contour abuts against and pushes the third pivot pin. As a result, the second guide rod rotates around the first fixed pin so that the bias force applied by the closing spring is directed towards the second direction, and the third guide rod rotates around the second fixed pin so that the bias force applied by the disconnect spring is directed towards the second direction.

9. The dual power supply transfer switch as described in claim 8, wherein, It also includes a first stop mechanism and a second stop mechanism, the first stop mechanism being configured to abut against a second pivot pin to hold the closing spring when the bias force of the closing spring is directed toward a first direction, and the second stop mechanism being configured to abut against a second pivot pin to hold the closing spring when the bias force of the closing spring is directed toward a second direction.

10. The dual power supply transfer switch as described in claim 8, wherein, It also includes a third stop mechanism and a fourth stop mechanism, the third stop mechanism being configured to abut against a third pivot pin to hold the opening spring when the biasing force of the opening spring is directed toward a first direction, and the fourth stop mechanism being configured to abut against a second pivot pin to hold the opening spring when the biasing force of the opening spring is directed toward a second direction.

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