A dual power transfer switch

Abstract

The present invention provides a dual power conversion switch. The dual power conversion switch includes a first contact assembly and a second contact assembly stacked in a first direction, and a power conversion mechanism arranged on a housing. The first contact assembly includes a first static contact and a first moving contact alternately arranged in a second direction perpendicular to the first direction, and the second contact assembly includes a second static contact and a second moving contact alternately arranged in a direction opposite to the second direction. The power conversion mechanism includes a drive assembly pivotally arranged on the housing. When the drive assembly rotates in a third direction from a double-break position toward a first power-on position, the drive assembly drives the first moving contact to translate in a direction opposite to the second direction to a first closing position; when the drive assembly rotates in a direction opposite to the third direction from the double-break position toward a second power-on position, the drive assembly drives the second moving contact to translate in the second direction to a second closing position.

Description

Technical Field

[0001] The invention relates to a dual power supply transfer switch. Background Art

[0002] Dual-source transfer switches are primarily used in emergency power supply systems, switching load circuits from one primary power source to another backup power source to ensure continuous, safe, and reliable operation of critical loads. As people's demands for quality of life continue to rise, power availability has become a key performance indicator, leading to more specialized requirements for manual transfer switches (MTSs).

[0003] Some existing MTS products require rotating the operating handle in the same direction to connect the primary power source, disconnect the switch, and connect the secondary power source. These products require an additional power supply reversing mechanism. Others allow for forward and reverse rotation of the operating handle, but the closing movement of the primary and secondary power supply moving contacts must be in the same direction. These mechanisms require an additional reversing mechanism. These products have very high R&D cycles and costs, are complex, and require higher reliability.

[0004] Therefore, it is an urgent problem to provide a manual dual power transfer switch with a short development cycle, low cost, reliable performance and reasonable structure. Summary of the Invention

[0005] Therefore, an object of the present invention is to provide a dual power transfer switch having high reliability, simple structure and low cost.

[0006] The present invention relates to a dual power transfer switch for switching between a first power source and a second power source. The dual power transfer switch includes a first contact assembly and a second contact assembly stacked in a first direction, and a power conversion mechanism disposed on a housing of the dual power transfer switch. The first contact assembly includes a first static contact and a first movable contact alternately disposed in a second direction perpendicular to the first direction, and the second contact assembly includes a second static contact and a second movable contact alternately disposed in a direction opposite to the second direction. The power conversion mechanism includes a drive assembly pivotally disposed on the housing. When the drive assembly rotates in a third direction from a double-open position toward a first power-on position, the drive assembly drives the first movable contact to translate in a direction opposite to the second direction to a first closed position, thereby connecting the first power source. When the drive assembly rotates in a direction opposite to the third direction from the double-open position toward the second power-on position, the drive assembly drives the second movable contact to translate in a second direction to a second closed position, thereby connecting the second power source.

[0007] According to one embodiment, the drive assembly includes: a main shaft, a first drive plate and a second drive plate fixed to the main shaft. The power conversion mechanism also includes: a first pin fixed to the first moving contact drive mechanism, and a second pin fixed to the second moving contact drive mechanism. The first drive plate and the second drive plate are separated from each other in a first direction, the first drive plate is provided with a first slot extending in a third direction, and the second drive plate is provided with a second slot extending in the third direction, and the first slot and the second slot are angularly offset relative to each other in the third direction. The first pin is inserted into the first slot, so that when the drive assembly rotates in the third direction from the double-open position toward the first power-on position, or in a direction opposite to the third direction from the first power-on position toward the double-open position, the first drive plate drives the first moving contact drive mechanism via the first pin, thereby switching the first moving contact between the first closed position and the first open position. At this time, the second drive plate rotates through a freewheeling motion and the second moving contact is in the second open position. The second pin is inserted into the second slot, so that when the drive assembly rotates from the double-off position toward the second power-on position in a direction opposite to the third direction or rotates from the second power-on position toward the double-off position in the third direction, the second drive plate drives the second moving contact drive mechanism through the second pin, thereby switching the second moving contact between the second closed position and the second open position. At this time, the first drive plate rotates an idle stroke and the first moving contact is in the first open position.

[0008] According to one embodiment, the length of the first slot in the third direction matches the distance between the first moving contact and the first static contact, and the length of the second slot in the third direction matches the distance between the second moving contact and the second static contact.

[0009] According to one embodiment, the angle at which the first slot and the second slot are offset relative to each other in the third direction matches the distance between the first pin and the second pin in the third direction.

[0010] According to one embodiment, when the drive assembly is in the dual-split position, the first pin abuts against the first end wall of the first slot, and the second pin abuts against the fourth end wall of the second slot; when the drive assembly is in the first power-on position, the first pin abuts against the second end wall of the first slot, and the second pin abuts against the third end wall of the second slot; and when the drive assembly is in the second power-on position, the first pin abuts against the second end wall of the first slot, and the second pin abuts against the third end wall of the second slot.

[0011] According to one embodiment, when the drive assembly rotates from the double-break position toward the first power-on position in a third direction, the first drive plate drives the first moving contact drive mechanism through the first pin, and then the first pin rotates with the first moving contact drive mechanism to abut against the second end wall of the first slot, during which the second drive plate rotates a lost motion so that the second pin abuts against the third end wall of the second slot; and when the drive assembly rotates from the first power-on position toward the double-break position in a direction opposite to the third direction, the first drive plate drives the first moving contact drive mechanism through the first pin, and then the first pin rotates with the first moving contact drive mechanism to abut against the first end wall of the first slot, during which the second drive plate rotates a lost motion so that the second pin abuts against the fourth end wall of the second slot.

[0012] According to one embodiment, when the drive assembly rotates from the double-break position toward the second power-on position in a direction opposite to the third direction, the second drive plate drives the second moving contact drive mechanism through the second pin, and then the second pin rotates with the second moving contact drive mechanism to abut against the third end wall of the second slot, during which the first drive plate rotates a lost stroke so that the first pin abuts against the second end wall of the first slot; and when the drive assembly rotates from the second power-on position toward the double-break position in the third direction, the second drive plate drives the second moving contact drive mechanism through the second pin, and then the second pin rotates with the second moving contact drive mechanism to abut against the fourth end wall of the second slot, during which the first drive plate rotates a lost stroke so that the first pin abuts against the first end wall of the first slot.

[0013] According to one embodiment, the power conversion mechanism further includes a handle connected to the main shaft and disposed outside the housing, and an operator rotates the drive assembly by rotating the handle.

[0014] According to one embodiment, the power conversion mechanism also includes a gear assembly, the gear assembly including a first gear and a second gear, wherein the first gear is fixed to the handle so that the first gear can rotate together with the handle, and wherein the second gear is fixed to the main shaft and meshes with the first gear so that the second gear can rotate in the opposite direction when the first gear rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The advantages and purposes of the present invention can be better understood from the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. In order to better illustrate the relationship between the various components in the accompanying drawings, the accompanying drawings are not drawn to scale. In the accompanying drawings:

[0016] Figure 1An external schematic diagram of a dual power transfer switch according to an embodiment of the present invention is shown;

[0017] Figure 2 A schematic diagram showing the internal structure of a dual power transfer switch according to an embodiment of the present invention;

[0018] Figure 3 Show Figure 2 A plan view of a first contact assembly and a first moving contact drive mechanism in a dual power transfer switch;

[0019] Figure 4 Show Figure 2 A plan view of a second contact assembly and a second moving contact drive mechanism in a dual power transfer switch;

[0020] Figure 5 A partial schematic diagram showing a power conversion mechanism of a dual power conversion switch according to an embodiment of the present invention;

[0021] Figure 6 A schematic diagram showing a dual power transfer switch in a dual-split state according to an embodiment of the present invention;

[0022] Figure 7 A schematic diagram showing a dual power transfer switch in a first power-on state according to an embodiment of the present invention;

[0023] Figure 8 A schematic diagram showing a dual power conversion switch in a second power-on state according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] Various embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that, in the accompanying drawings, the same reference numerals are assigned to components having substantially the same or similar structures and functions, and repeated descriptions thereof will be omitted. Unless otherwise specified, the terms "upper", "lower", "left", "right", etc. herein are described relative to the drawings of the present invention and do not limit the scope of the present invention. The description of "first" and its variations is merely to distinguish between the components and does not limit the scope of the present invention. Without departing from the scope of the present invention, "first component" may be written as "second component", etc.

[0025] The drawings in this specification are schematic diagrams, which assist in explaining the concept of the present invention and schematically show the shapes of various parts and their mutual relationships.

[0026] Below, refer to Figures 1 to 8 , a preferred embodiment of the present invention is described in detail.

[0027] The dual power switch of the present invention is used to switch between a first power source and a second power source, for example, to switch between the two power sources under manual operation. Figure 1 and Figure 2 The dual power conversion switch includes a first contact assembly 1 and a second contact assembly 2 stacked in a first direction, and a power conversion mechanism 4 provided on a housing 3 of the dual power conversion switch. Figure 1 In the figure, the first direction is the height direction of the manual dual power switch, which is the direction indicated by the arrow in the figure. Figure 2 , the first direction is the vertical upward direction.

[0028] See also Figure 3 The first contact assembly 1 includes first static contacts 11 and first moving contacts 12 alternately arranged in a second direction perpendicular to the first direction. A plurality of first moving contacts 12 are arranged on a common support structure. Each first moving contact 12 is respectively assigned a corresponding first static contact 11. When each first moving contact 12 is in contact with the corresponding first static contact 11, that is, the first moving contact is in the first closed position, and the first power supply is connected; when each first moving contact 12 is separated from the corresponding first static contact 11, that is, the first moving contact is in the first open position, and the first power supply is disconnected.

[0029] See also Figure 4 The second contact assembly 2 includes second static contacts 21 and second moving contacts 22 arranged alternately in a direction opposite to the second direction. A plurality of second moving contacts 22 are disposed on a common support structure. Each second moving contact 22 is assigned a corresponding second static contact 21. When each second moving contact 22 is in contact with the corresponding second static contact 21, that is, the second moving contact is in the second closed position, the second power supply is connected; when each second moving contact 22 is separated from the corresponding second static contact 21, that is, the second moving contact is in the second open position, the second power supply is disconnected.

[0030] Figure 3 and Figure 4 The present invention does not limit the number of the static contacts and the moving contacts, and the number of the moving contacts can be, for example, one, two, three, or four.

[0031] In addition, if Figure 3 As shown, the first moving contact 12 is connected to the first moving contact driving mechanism 41 and can be switched between the first closing position and the first opening position under the drive of the first moving contact driving mechanism 41. Figure 4 As shown, the second moving contact 22 is connected to the second moving contact driving mechanism 42 and can be switched between the second closing position and the second opening position under the drive of the second moving contact driving mechanism 42. The first moving contact driving mechanism 41 and the second moving contact driving mechanism 42 can have a known structure. Figure 3-4 As shown, the first moving contact driving mechanism 41 can drive the first moving contact 12 to translate from the first opening position to the first closing position in a direction opposite to the second direction, or from the first closing position to the first opening position in the second direction; the second moving contact driving mechanism 42 can drive the second moving contact 22 to translate from the second opening position to the second closing position in the second direction, or from the second closing position to the second opening position in a direction opposite to the second direction. In other words, the directions of opening and closing movements of the first moving contact and the second moving contact are opposite.

[0032] See also Figure 5 The power conversion mechanism 4 includes a drive assembly pivotally mounted on the housing 3. The drive assembly includes a main shaft 13 pivotally mounted on the housing 3, a first drive plate 5 fixed to the main shaft, and a second drive plate 8. The first drive plate 5 and the second drive plate 8 are separated from each other in a first direction. A first slot 6 is provided on the first drive plate 5, and a second slot 9 is provided on the second drive plate. The first slot 6 and the second slot 9 are angularly offset relative to each other in the circumferential rotation direction of the two drive plates, for example, in the third direction.

[0033] The first slot 6 extends in the circumferential rotational direction (e.g., the third direction) of the first drive plate 5, and its length in this circumferential rotational direction matches, for example, the distance between the first movable contact and the first stationary contact. The second slot 9 extends along the circumferential rotational direction (e.g., the third direction) of the second drive plate 8, and its length in this circumferential rotational direction matches, for example, the distance between the second movable contact and the second stationary contact. The angle between the first slot 6 and the second slot 9 in the circumferential rotational direction matches the distance between the first pin 7 and the second pin 10 in the circumferential rotational direction.

[0034] like Figure 5 As shown, the power conversion mechanism 4 also includes a handle 14 connected to the main shaft 13 and disposed outside the housing 3. The operator rotates the handle to rotate the drive assembly. In addition, the power conversion mechanism also includes a gear assembly, which is located between the handle and the main shaft to drive the drive assembly to rotate when the handle rotates. The gear assembly, for example, includes a gear pair, namely a first gear 15 and a second gear 16. The first gear 15 is disposed on the handle 14 and is capable of rotating in the same direction as the handle when the handle rotates. The second gear 16 is disposed on the main shaft 13 and meshes with the first gear, capable of rotating in the opposite direction when the first gear rotates. When the handle 13 rotates clockwise, the gear pair drives the drive assembly to rotate counterclockwise, that is, in the direction opposite to the third direction; when the handle rotates counterclockwise, the gear pair drives the drive assembly to rotate clockwise, that is, in the third direction.

[0035] See again Figure 2The power conversion mechanism 4 further includes a first pin 7 fixed to the first moving contact driving mechanism 41 and a second pin 10 fixed to the second moving contact driving mechanism 42. The first moving contact driving mechanism 41 and the second moving contact driving mechanism 42 are both sleeved on the main shaft 13.

[0036] The first pin 7 can be inserted into the first slot 6, so that when the drive assembly rotates from the double-off position toward the first power-on position or from the first power-on position toward the double-off position, the first drive plate 5 drives the first moving contact drive mechanism 41 through the first pin 7, thereby switching the first moving contact 12 between the first closing position and the first opening position. At this time, the second drive plate 8 rotates an idle stroke, so that the second moving contact 22 is in the second opening position.

[0037] The second pin 10 is inserted into the second slot 9, so that when the drive assembly rotates from the double-off position toward the second power-on position or from the second power-on position toward the double-off position, the second drive plate 8 drives the second moving contact drive mechanism through the second pin 10, thereby switching the second moving contact 22 between the second closed position and the second open position. At this time, the first drive plate 5 rotates an idle stroke, so that the first moving contact 12 is in the first open position.

[0038] like Figure 6 As shown, since the first slot 6 and the second slot 9 are angularly staggered relative to each other in the third direction, when the drive assembly is in the double-split position, the first pin 7 abuts against the first end wall 61 of the first slot 6, and the second pin 10 abuts against the fourth end wall 92 of the second slot 9. At this time, the drive assembly can be in the third direction ( Figure 6 For example, when the drive assembly rotates in the third direction, only the first drive plate drives the first moving contact drive mechanism to rotate.

[0039] like Figure 7 As shown, when the drive assembly is in the first power-on position, the first pin 7 abuts against the second end wall 62 of the first slot 6, and the second pin abuts against the third end wall 91 of the second slot 9. At this time, the drive assembly can be in the direction opposite to the third direction ( Figure 7 Due to the obstruction of the second moving contact driving mechanism, the driving assembly cannot rotate in the third direction.

[0040] like Figure 8 As shown, when the drive assembly is in the second power-on position, the first pin 7 abuts against the second end wall 62 of the first slot 6, and the second pin 10 abuts against the third end wall 91 of the second slot 9. At this time, the drive assembly can be in the third direction ( Figure 8 Due to the obstruction of the first moving contact driving mechanism, the driving assembly cannot rotate in the direction opposite to the third direction.

[0041] In the above embodiment of the present invention, the dual power transfer switch is a three-position transfer switch. However, the present invention is not limited thereto. When the first slot and the second slot have sufficient lengths, the dual power transfer switch can also be a two-position transfer switch.

[0042] Reference below Figure 6-8 Describe in detail how the power conversion mechanism switches between different states.

[0043] like Figure 6 and 7 As shown, when the drive assembly rotates in the third direction from the double-open position toward the first power-on position, the first drive plate 5 drives the first moving contact drive mechanism 41 through the first pin 7, causing the elastic member in the first moving contact drive mechanism 41 to reach the "dead point". After passing the "dead point", the elastic member releases the elastic force, thereby further driving the first moving contact drive mechanism 41, and then causing the first pin 7 to rotate with the first moving contact drive mechanism 41 until it abuts against the second end wall 62 of the first slot 6, as shown in FIG. Figure 7 During this process, the second drive plate 8 rotates a lost motion, so that the second pin 10 abuts against the third end wall 91 of the second slot 9 .

[0044] like Figure 6 and 7 As shown, when the drive assembly rotates in a direction opposite to the third direction from the first power-on position toward the double-open position, the first drive plate 5 drives the first movable contact drive mechanism 41 via the first pin 7, causing the elastic member in the first movable contact drive mechanism 41 to reach a "dead point." After passing the "dead point," the elastic member releases its elastic force, thereby further driving the first movable contact drive mechanism 41. This causes the first pin 7 to rotate along with the first movable contact drive mechanism 41 until it abuts against the first end wall 61 of the first slot 6. During this process, the second drive plate 8 rotates through a lost motion, causing the second pin 10 to abut against the fourth end wall 92 of the second slot 9.

[0045] like Figure 6 and 8 As shown, when the driving assembly rotates from the double-open position toward the second power-on position in a direction opposite to the third direction, the second driving plate 8 drives the second moving contact driving mechanism 42 through the second pin 10, so that the elastic member (such as Figure 4 After reaching the "dead point" (schematically shown in FIG), the elastic member releases its elastic force after passing the "dead point", thereby further driving the second moving contact driving mechanism 42, thereby causing the second pin 10 to rotate along with the second moving contact driving mechanism 42 until it abuts against the third end wall 91 of the second slot 9. During this process, the first drive plate 5 rotates a certain distance, causing the first pin 7 to abut against the second end wall 62 of the first slot 6.

[0046] like Figure 6 and8 As shown, when the drive assembly rotates in the third direction from the second power-on position toward the double-open position, the second drive plate 8 drives the second movable contact drive mechanism 42 via the second pin 10, causing the elastic member in the second movable contact drive mechanism 42 to reach a "dead point." After passing the "dead point," the elastic member releases its elastic force, thereby further driving the second movable contact drive mechanism 42. This causes the second pin 10 to rotate along with the second movable contact drive mechanism 42 until it abuts against the fourth end wall 92 of the second slot 9. During this process, the first drive plate 5 rotates through a lost motion, causing the first pin 7 to abut against the first end wall 61 of the first slot 6.

[0047] In the above embodiment of the present invention, the first contact assembly is located above the second contact assembly. However, the present invention is not limited thereto. In other embodiments, the first contact assembly may be located below the second contact assembly, and the mechanical structures for the first contact assembly and the second contact assembly in the power conversion mechanism may be interchanged to implement the dual power conversion switch of the present invention.

[0048] The dual power conversion switch of the present invention can be obtained by changing the structure of an existing switch, so it is easy to implement, simple in structure and low in cost.

[0049] In addition, the technical features disclosed above are not limited to the disclosed combinations with other features. Those skilled in the art can also make other combinations between the technical features according to the purpose of the invention to achieve the purpose of the present invention.

Claims

1. A dual power switch for switching between a first power source and a second power source, characterized in that: The dual power conversion switch comprises a first contact assembly (1) and a second contact assembly (2) stacked in a first direction, and a power conversion mechanism (4) provided on a housing (3) of the dual power conversion switch. wherein the first contact assembly (1) comprises a first static contact (11) and a first moving contact (12) alternately arranged in a second direction perpendicular to the first direction, the second contact assembly (2) comprises a second static contact (21) and a second moving contact (22) alternately arranged in a direction opposite to the second direction, a plurality of first moving contacts are arranged on a common support structure, a plurality of second moving contacts are arranged on a common support structure, and the power conversion mechanism comprises a drive assembly pivotably arranged on the housing, and When the drive assembly rotates in a third direction from the double-break position toward the first power-on position, the drive assembly drives the first moving contact (12) to translate in a direction opposite to the second direction to the first closing position, thereby connecting the first power supply; and when the drive assembly rotates in a direction opposite to the third direction from the double-break position toward the second power-on position, the drive assembly drives the second moving contact (22) to translate in a second direction to the second closing position, thereby connecting the second power supply. The driving assembly comprises: a main shaft (13), a first driving plate (5) and a second driving plate (8) fixed on the main shaft, The power conversion mechanism (4) further includes: a first pin (7) fixed on the first moving contact driving mechanism (41), and a second pin (10) fixed on the second moving contact driving mechanism (42). The first drive plate (5) and the second drive plate (8) are separated from each other in a first direction, the first drive plate (5) is provided with a first slot (6) extending in a third direction, the second drive plate (8) is provided with a second slot (9) extending in the third direction, and the first slot (6) and the second slot (9) are staggered relative to each other in the third direction. wherein the first pin (7) is inserted into the first slot (6), so that when the drive assembly rotates in a third direction from the double-open position toward the first power-on position or in a direction opposite to the third direction from the first power-on position toward the double-open position, the first drive plate (5) drives the first moving contact drive mechanism (41) via the first pin (7), thereby switching the first moving contact (12) between the first closing position and the first opening position, and at this time, the second drive plate (8) rotates an idle stroke and the second moving contact (22) is in the second opening position, and The second pin (10) is inserted into the second slot (9), so that when the drive assembly rotates from the double-off position toward the second power-on position in a direction opposite to the third direction or rotates from the second power-on position toward the double-off position in the third direction, the second drive plate (8) drives the second moving contact drive mechanism (42) through the second pin (10), thereby switching the second moving contact (22) between the second closing position and the second opening position, and at this time, the first drive plate (5) rotates an idle stroke and the first moving contact (12) is in the first opening position.

2. The dual power conversion switch according to claim 1, wherein: The length of the first slot (6) in the third direction matches the distance between the first moving contact (12) and the first static contact (11), and the length of the second slot (9) in the third direction matches the distance between the second moving contact (22) and the second static contact (21).

3. The dual power conversion switch according to claim 1, wherein: The angle at which the first slot (6) and the second slot (9) are offset relative to each other in the third direction matches the distance between the first pin (7) and the second pin (10) in the third direction.

4. The dual power conversion switch according to claim 1, wherein: When the drive assembly is in the double-split position, the first pin (7) abuts against the first end wall (61) of the first slot (6), and the second pin (10) abuts against the fourth end wall (92) of the second slot (9); When the drive assembly is located at a first power-on position, the first pin (7) abuts against the second end wall (62) of the first slot (6), and the second pin (10) abuts against the third end wall (91) of the second slot (9); as well as When the drive assembly is in the second power-on position, the first pin (7) abuts against the second end wall (62) of the first slot (6), and the second pin (10) abuts against the third end wall (91) of the second slot (9).

5. The dual power conversion switch according to claim 4, wherein: When the drive assembly rotates in the third direction from the double-split position toward the first power-on position, the first drive plate (5) drives the first moving contact drive mechanism (41) through the first pin (7), and then the first pin (7) rotates with the first moving contact drive mechanism (41) to abut against the second end wall (62) of the first slot (6). During this process, the second drive plate (8) rotates through an idle stroke, so that the second pin (10) abuts against the third end wall (91) of the second slot (9); as well as When the drive assembly rotates from the first power-on position toward the double-open position in a direction opposite to the third direction, the first drive plate (5) drives the first moving contact drive mechanism (41) through the first pin (7), and then the first pin (7) rotates with the first moving contact drive mechanism (41) to abut against the first end wall (61) of the first slot (6). During this process, the second drive plate (8) rotates an idle stroke, so that the second pin (10) abuts against the fourth end wall (92) of the second slot (9).

6. The dual power conversion switch according to claim 4 or 5, characterized in that: When the drive assembly rotates from the double-split position toward the second power-on position in a direction opposite to the third direction, the second drive plate (8) drives the second moving contact drive mechanism (42) through the second pin (10), and then the second pin (10) rotates with the second moving contact drive mechanism (42) to abut against the third end wall (91) of the second slot (9), and during this process, the first drive plate (5) rotates an idle stroke, so that the first pin (7) abuts against the second end wall (62) of the first slot (6); as well as When the drive assembly rotates in the third direction from the second power-on position toward the double-open position, the second drive plate (8) drives the second moving contact drive mechanism (42) through the second pin (10), and then the second pin (10) rotates with the second moving contact drive mechanism (42) to abut against the fourth end wall (92) of the second slot (9). During this process, the first drive plate (5) rotates an idle stroke, so that the first pin (7) abuts against the first end wall (61) of the first slot (6).

7. The dual power conversion switch according to claim 1, wherein: The power conversion mechanism further comprises a handle (14), which is connected to the main shaft (13) and is arranged outside the housing (3), and an operator rotates the drive assembly by rotating the handle.

8. The dual power conversion switch according to claim 7, wherein: The power conversion mechanism further comprises a gear assembly, wherein the gear assembly comprises a first gear (15) and a second gear (16). wherein the first gear (15) is fixed to the handle (14) so ​​that the first gear can rotate together with the handle (14); and The second gear (16) is fixed to the main shaft (13) and meshes with the first gear (15), so that the second gear (16) can rotate in the opposite direction when the first gear (15) rotates.

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