Dual-power change-over switch

Abstract

The embodiment of the utility model provides a dual-power-supply change-over switch. The dual-power-supply change-over switch comprises a support; the paired main spring assemblies are rotatably arranged on the bracket; a pair of drive assemblies, each coupled to and drivable by a respective main spring assembly, the pair of drive assemblies each including an output shaft; the at least one indicating assembly is rotatably arranged on the support and comprises a transmission piece and an indicating piece, the transmission piece comprises a main body part and a connecting hole formed in the main body part, the connecting hole is formed around the corresponding output shaft, the indicating piece comprises a matching part and an indicating part, and the matching part is matched with the indicating part. The matching part is coupled to the main body part and can be driven by the main body part, and the indicating part comprises a switching-on indicating mark and a switching-off indicating mark which are arranged away from the matching part.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure generally relate to the technical field of electrical equipment, and more particularly, to dual power transfer switches. BACKGROUND

[0002] Dual power transfer switches are important low-voltage electrical switches, which are widely used in important loads such as hospitals, airports, and fire departments, etc. that do not allow power failure.

[0003] The pair of main spring assemblies in the dual power transfer switch can move and drive the corresponding drive assemblies to act, and the corresponding drive assemblies can drive the corresponding movable contact assemblies to move through the output shafts to switch the corresponding movable contact assemblies between the closed state and the open state, so that the dual power transfer switch is conductive with the main power supply or the standby power supply. SUMMARY

[0004] In one aspect of the present disclosure, a dual power transfer switch is provided, which includes a bracket, a pair of main spring assemblies rotatably disposed on the bracket, a pair of drive assemblies each coupled to and drivable by a corresponding main spring assembly, the pair of drive assemblies each including an output shaft, and at least one indication assembly rotatably disposed on the bracket and including a transmission member and an indication member, the transmission member including a main body portion and a connecting hole disposed on the main body portion, the connecting hole disposed around the corresponding output shaft, the indication member including a fitting portion and an indication portion, the fitting portion coupled to and drivable by the main body portion, and the indication portion including a closed indication mark and an open indication mark disposed away from the fitting portion.

[0005] According to embodiments of the present disclosure, since the output shafts of the drive assemblies can drive the corresponding transmission members and the corresponding indication members to rotate, and the output shafts of the drive assemblies can drive the corresponding movable contact assemblies to act, the state of the movable contact assemblies can be indicated by the corresponding indication members. The indication portion includes the closed indication mark and the open indication mark disposed away from the fitting portion, and the operator can know the state of the corresponding movable contact assemblies by observing the closed indication mark and the open indication mark, so as to facilitate the operator to know that the dual power transfer switch is conductive with the main power supply or the standby power supply.

[0006] In some embodiments, the at least one indication assembly includes a pair of indication assemblies, and the connecting hole of each indication assembly of the pair of indication assemblies is disposed around the corresponding output shaft of the pair of drive assemblies.

[0007] In some embodiments, the indication member includes a rotating portion between the fitting portion and the indication portion, the rotating portion includes a rotating hole, the bracket includes at least one rotating shaft, and the rotating hole is disposed around the corresponding rotating shaft.

[0008] In some embodiments, the indicating part comprises an arc surface extending along a rotation direction of the indicating member, and the closing indicating mark and the opening indicating mark are arranged on the arc surface.

[0009] In some embodiments, the fitting part comprises a fitting groove facing away from the indicating part, the transmission member comprises a transmission part arranged on the main body part, and the transmission part is located in the fitting groove and can be fitted with the fitting groove.

[0010] In some embodiments, the transmission part is arranged on a side of the main body part facing the bracket; or the transmission part is arranged on a side of the main body part facing away from the bracket.

[0011] In some embodiments, the bracket further comprises at least one mounting shaft, the main body part further comprises a mounting hole, and the mounting hole is arranged around the corresponding mounting shaft.

[0012] In some embodiments, a weight-reducing hole is arranged on the main body part, and the weight-reducing hole is staggered with the connecting hole and the mounting hole.

[0013] In some embodiments, the dual power transfer switch further comprises a housing, the housing comprises at least one indicating hole, and the at least one indicating hole is used to present the closing indicating mark and the opening indicating mark of the corresponding indicating part.

[0014] In some embodiments, the at least one indicating hole comprises a pair of indicating holes.

[0015] It should be understood that the content described in this part is not intended to limit the key features or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and other features, advantages, and aspects of embodiments of the present disclosure will become more apparent by describing in detail some embodiments thereof with reference to the attached drawings. In the drawings, the same or similar reference numerals refer to the same or similar elements, in which:

[0017] Figure 1 Part structure schematic diagram of a dual power transfer switch according to some embodiments of the present disclosure is shown;

[0018] Figure 2 Part structure schematic diagram of a bracket, a main spring assembly, a driving assembly, and an indicating assembly according to some embodiments of the present disclosure is shown;

[0019] Figure 3Structure diagram of a main spring assembly, a driving assembly and a moving contact assembly according to some embodiments of the present disclosure is shown.

[0020] Figure 4 Structure diagram of an indicating piece according to some embodiments of the present disclosure is shown.

[0021] Figure 5 Structure diagram of a transmission piece according to some embodiments of the present disclosure is shown.

[0022] Figures 6 to 8 Working diagram of a double power transfer switch according to some embodiments of the present disclosure is shown.

[0023] Explanation of reference signs:

[0024] 100 is a double power transfer switch;

[0025] 1 is a support, 11 is a rotating shaft, and 12 is a mounting shaft;

[0026] 2 is a main spring assembly;

[0027] 3 is a driving assembly, and 31 is an output shaft;

[0028] 4 is an indicating assembly, 41 is a transmission piece, 411 is a main body, 412 is a connecting hole, 413 is a transmission part, 414 is a mounting hole, 415 is a weight-reducing hole, 42 is an indicating piece, 421 is a matching part, 4211 is a matching groove, 422 is an indicating part, 4221 is an arc surface, 4222 is a closing indication mark, 4223 is an opening indication mark, 423 is a rotating part, and 4231 is a rotating hole;

[0029] 5 is a shell, and 51 is an indicating hole;

[0030] 6 is a moving contact assembly; and 7 is a crank arm. DETAILED DESCRIPTION

[0031] Preferred embodiments of the present disclosure will be described in more detail by making reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Instead, these embodiments are provided so as to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0032] The term "includes," "including," "has," "having," "contains" or "containing," used in this document means "including, but not limited to." The term "or" means "and / or" unless expressly stated otherwise. The term "based on" means "based, at least in part, on." The terms "one example embodiment" and "an embodiment" mean "at least one example embodiment." The term "another embodiment" means "at least one additional example embodiment." The terms "a first," "a second," "the first," "the second," and the like in the description and in the claims, can refer to different or same objects unless expressly stated otherwise.

[0033] The pair of main spring assemblies can move and drive the corresponding drive assemblies to act, and the corresponding drive assemblies can drive the corresponding movable contact assemblies to move through the output shafts to switch the corresponding movable contact assemblies between the closed state and the open state, so that the dual power transfer switch is connected with the main power supply or the standby power supply.

[0034] Specifically, when the corresponding movable contact assembly is in the closed state, the main power supply or the standby power supply connected with the corresponding movable contact assembly is connected; and when the corresponding movable contact assembly is in the open state, the main power supply or the standby power supply connected with the corresponding movable contact assembly is disconnected. However, the state of the pair of movable contact assemblies needs to be indicated to facilitate the operator to know that the dual power transfer switch is connected with the main power supply or the standby power supply. Embodiments of the present disclosure provide a dual power transfer switch 100 to at least partially solve the above problems. In the following, the dual power transfer switch 100 will be described in detail in conjunction with the accompanying drawings. Figures 1 to 8 The principles of the present disclosure are described.

[0035] Figure 1 A partial structural schematic diagram of the dual power transfer switch 100 according to some embodiments of the present disclosure is shown. Figure 2 A partial structural schematic diagram of the bracket 1, the main spring assembly 2, the drive assembly 3, and the indication assembly 4 according to some embodiments of the present disclosure is shown. As shown in the figure, the bracket 1 is provided with a plurality of main spring assemblies 2, a plurality of drive assemblies 3, and at least one indication assembly 4. Figure 1 And Figure 2 As shown in the figures, the dual power transfer switch 100 described herein generally includes a bracket 1, a pair of main spring assemblies 2, a pair of drive assemblies 3, at least one indication assembly 4, a housing 5, and a pair of movable contact assemblies 6.

[0036] Referring to Figure 1 And Figure 2 In some embodiments, the pair of main spring assemblies 2 are rotatably arranged on the bracket 1 to switch between the energy storage state and the energy release state. The pair of drive assemblies 3 are each coupled to the corresponding main spring assembly 2 and rotatably arranged on the bracket 1. Thus, during the switching of the pair of main spring assemblies 2 from the energy storage state to the energy release state, when the pair of drive assemblies 3 are tripped, the pair of main spring assemblies 2 can each drive the corresponding drive assembly 3 to rotate. However, during the switching of the pair of main spring assemblies 2 from the energy release state to the energy storage state, the pair of main spring assemblies 2 do not drive the corresponding drive assemblies 3 to rotate.

[0037] Figure 3 A structural schematic diagram of the pair of main spring assemblies 2, the pair of drive assemblies 3, and the pair of moving contact assemblies 6 is shown according to some embodiments of the present disclosure. As shown, the pair of drive assemblies 3 are each coupled to a corresponding moving contact assembly 6, for example, can be connected to the corresponding moving contact assembly 6 through a toggle arm 7, thus the pair of drive assemblies 3 are each capable of driving the corresponding moving contact assembly 6 to act, so as to switch the moving contact assembly 6 between the closed state and the open state, and make the double power transfer switch 100 conductive to the main power source or the standby power source. Figure 3

[0038] It should be noted that, referring to Figure 2 , the pair of main spring assemblies 2, the pair of drive assemblies 3, and the at least one indicating assembly 4 can be arranged between the bracket 1 and the side plate. It can be understood that, in order to avoid the side plate shielding the pair of main spring assemblies 2, the pair of drive assemblies 3, and the at least one indicating assembly 4, thus the side plate is not shown in Figure 2 . Referring to Figure 3 , the output shaft 31 of the pair of drive assemblies 3 can pass through the side plate and be coupled to the toggle arm 7 and the moving contact assembly 6, that is, the toggle arm 7 and the moving contact assembly 6 are located on the side of the side plate away from the bracket 1.

[0039] Figure 4 A structural schematic diagram of the indicating member 42 is shown according to some embodiments of the present disclosure. As shown in Figure 1 , Figure 2 and Figure 4 , in some embodiments, the at least one indicating assembly 4 is rotatably arranged on the bracket 1, and includes a transmission member 41 and an indicating member 42. The transmission member 41 includes a main body portion 411 and a connecting hole 412 arranged on the main body portion 411, the connecting hole 412 is arranged around the output shaft 31 of the corresponding drive assembly 3, so that the drive assembly 3 can drive the corresponding transmission member 41 to rotate relative to the bracket 1 through the output shaft 31. The indicating member 42 includes a fitting portion 421 and an indicating portion 422. The fitting portion 421 is coupled to the main body portion 411 and can be driven by the main body portion 411, so that the indicating member 42 can be driven by the corresponding transmission member 41. The indicating portion 422 includes a closed indication mark 4222 and an open indication mark 4223 arranged away from the fitting portion 421, wherein the closed indication mark 4222 and the open indication mark 4223 can be used to indicate the state of the corresponding moving contact assembly 6, and further indicate that the double power transfer switch 100 is conductive to the main power source or the standby power source.

[0040] ​According to the embodiment of the present disclosure, since the output shaft 31 of the driving assembly 3 is capable of driving the corresponding transmission member 41 and the corresponding indicating member 42 to rotate, and the output shaft 31 of the driving assembly 3 is capable of driving the corresponding movable contact assembly 6 to act, the state of the movable contact assembly 6 can be indicated by the corresponding indicating member 42. On the other hand, since the indicating part 422 comprises the closing indicating mark 4222 and the opening indicating mark 4223 which are arranged away from the matching part 421, the operator can know the state of the corresponding movable contact assembly 6 by observing the closing indicating mark 4222 and the opening indicating mark 4223, so as to facilitate the operator to know that the double power transfer switch 100 is in conduction with the main power source or the standby power source.

[0041] With reference to the foregoing Figure 4 In some embodiments, the indicating part 422 comprises an arc surface 4221 which extends along the rotation direction of the indicating member 42. The arc surface 4221 can be arranged away from the matching part 421, so that the indicating marks are more easily observed by the operator. The closing indicating mark 4222 and the opening indicating mark 4223 can be arranged on the arc surface 4221 in a spaced manner. It can be understood that, since the indicating member 42 is rotatably arranged, the distance between the closing indicating mark 4222 and the opening indicating mark 4223 can be reasonably set according to the rotation distance of the indicating member 42, so as to ensure that the closing indicating mark 4222 and the opening indicating mark 4223 can be observed, thereby guaranteeing the indicating effect. In addition, the arc surface 4221 can also avoid the problem of interference between the indicating member 42 and other components such as the shell 5 during rotation.

[0042] The indicating marks according to the embodiment of the present disclosure can be various types of indicating marks which can play an indicating effect, and the embodiments of the present disclosure do not make any limitation in this regard. For example, in some embodiments, the closing indicating mark 4222 can comprise a word indicating mark “I”, and the opening indicating mark 4223 can comprise a word indicating mark “O”. Of course, in other embodiments, the difference between the closing indicating mark 4222 and the opening indicating mark 4223 can be in color or other types of words. The embodiments of the present disclosure do not make any limitation in this regard.

[0043] With reference to the foregoing Figure 1 , Figure 2 and Figure 4 In some embodiments, the indicating member 42 can comprise a rotating part 423 which is located between the matching part 421 and the indicating part 422. The rotating part 423 can comprise a rotating hole 4231. Correspondingly, the bracket 1 can comprise at least one rotating shaft 11, and the rotating hole 4231 can be arranged around the corresponding rotating shaft 11. Thus, the indicating member 42 can rotate relative to the bracket 1 around the corresponding rotating shaft 11 when being driven by the transmission member 41.

[0044] Figure 5 A structural schematic diagram of the transmission member 41 is shown according to some embodiments of the present disclosure. As shown in Figure 2 、 Figure 4 and Figure 5 , in some embodiments, the fitting part 421 can include a fitting groove 4211 facing away from the indicating part 422, and correspondingly, the transmission member 41 can include a transmission part 413 arranged on the main body part 411. The transmission part 413 can be located in the fitting groove 4211 and can be fitted with the fitting groove 4211. In this way, the transmission member 41 can drive the indicating member 42 to rotate. It should be understood that in other embodiments, the transmission member 41 and the indicating member 42 can be fitted in any other appropriate manner, for example, the fitting part 421 can include a fitting hole facing away from the indicating part 422, and the transmission part 413 can be located in the fitting hole and can be fitted with the fitting hole.

[0045] Referring to Figure 2 and Figure 5 , in some embodiments, the transmission part 413 can be arranged on the side of the main body part 411 facing the bracket 1. It should be understood that in other embodiments, the transmission part 413 can also be arranged on the side of the main body part 411 facing away from the bracket 1, and the embodiments of the present disclosure do not limit this.

[0046] Referring to Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , in some embodiments, the bracket 1 can further include at least one mounting shaft 12. The main body part 411 can further include a mounting hole 414, and the mounting hole 414 can be arranged around the corresponding mounting shaft 12. As can be seen from Figure 2 , the mounting hole 414 and the connecting hole 412 are staggered, so that the output shaft 31 of the driving assembly 3 can drive the corresponding transmission member 41 to rotate relative to the bracket 1 around the corresponding mounting shaft 12, and then the transmission member 41 can drive the corresponding indicating member 42 to rotate.

[0047] Continuing to refer to Figure 5 , further, in order to meet the weight reduction design of the indicating assembly 4, the main body part 411 can be provided with a weight reduction hole 415, and the weight reduction hole 415 can be staggered with the connecting hole 412 and the mounting hole 414. The weight reduction hole 415 according to the embodiments of the present disclosure can be various shapes of weight reduction holes 415, and the embodiments of the present disclosure do not limit this. For example, in some embodiments, the weight reduction hole 415 can be circular.

[0048] In some embodiments, the dual power transfer switch 100 can further include a housing 5. The bracket 1, the pair of main spring assemblies 2, the pair of drive assemblies 3, and the at least one indication assembly 4 can be disposed within the housing 5. The housing 5 can include at least one indication hole 51, which is shown in Figures 6 to 8 FIG. 13. The at least one indication hole 51 is used to present the closed indication mark 4222 and the open indication mark 4223 of the corresponding indication portion 422. In this way, the operator can observe the closed indication mark 4222 and the open indication mark 4223 through the at least one indication hole 51, so as to know the state of the corresponding movable contact assembly 6, and thus to know whether the dual power transfer switch 100 is connected with the main power source or the standby power source.

[0049] It should be noted that, since the dual power transfer switch 100 implements the operation of opening first and closing second in the case of receiving the transfer command, in the case that one movable contact assembly 6 of the pair of movable contact assemblies 6 is in the open state, the other movable contact assembly 6 is correspondingly in the closed state, therefore the at least one indication assembly 4 can include one indication assembly 4, and the indication assembly 4 can be driven by the output shaft 31 of the corresponding drive assembly 3. It can be understood that one movable contact assembly 6 of the pair of movable contact assemblies 6 can be directly indicated, and the other movable contact assembly 6 can be indirectly indicated. However, by one indication assembly 4 indicating the states of the pair of movable contact assemblies 6 at the same time, if the movable contact assembly 6 which is indirectly indicated fails to switch to the corresponding state during the rotation, there can be a problem of indication error, thus causing a safety hazard.

[0050] Based on this, the at least one indication assembly 4 can include a pair of indication assemblies 4. The connecting hole 412 of each indication assembly 4 of the pair of indication assemblies 4 is disposed around the corresponding output shaft 31 of the pair of drive assemblies 3, so as to enable each indication assembly 4 to be driven by the output shaft 31 of the corresponding drive assembly 3. It can be understood that, since each movable contact assembly 6 is directly indicated, the case of indication error is avoided.

[0051] Further, the at least one indication hole 51 is disposed on the housing 1. In the case that the at least one indication assembly 4 includes a pair of indication assemblies 4, correspondingly, the at least one indication hole 51 can include a pair of indication holes 51. Each of the pair of indication holes 51 is used to present the closed indication mark 4222 and the open indication mark 4223 of the corresponding indication portion 422. In this way, the operator can observe the closed indication mark 4222 and the open indication mark 4223 through the pair of indication holes 51, so as to know the state of the corresponding movable contact assembly 6, and thus to know whether the dual power transfer switch 100 is connected with the main power source or the standby power source. Since each movable contact assembly 6 is directly indicated, the case of indication error is avoided.

[0052] Further, the rotating shaft 11 and the mounting shaft 12 are coupled to not only the indication assembly 4 but also the main spring assembly 2.

[0053] Figures 6 to 8 A working schematic diagram of the dual power transfer switch 100 according to some embodiments of the present disclosure is shown. As Figure 6 shown, the pair of main spring assemblies 2 are in the energy releasing state, in which the pair of main spring assemblies 2 on the right are responsible for the switching of the power S1, and the pair of main spring assemblies 2 on the left are responsible for the switching of the power S2. The open indication mark 4223 of the indication assembly 4 on the right (for the convenience of distinction, referred to as the first indication assembly 4) of the pair of indication assemblies 4 can be observed, indicating that the moving contact assembly 6 coupled to the first indication assembly 4 is in the open state, and thus the power S1 coupled to the moving contact assembly 6 is not turned on. Correspondingly, the closed indication mark 4222 of the indication assembly 4 on the left (for the convenience of distinction, referred to as the second indication assembly 4) of the pair of indication assemblies 4 can be observed, indicating that the moving contact assembly 6 coupled to the second indication assembly 4 is in the closed state, and thus the power S2 coupled to the moving contact assembly 6 is turned on. Thus, the operator can observe the information that S1 is open and S2 is closed through the indication hole 51.

[0054] It should be noted that each indication assembly 4 of the pair of indication assemblies 4 according to the embodiments of the present disclosure can be symmetrically arranged, and thus the indication assembly 4 can be assembled in the positive direction or the reverse direction on the bracket 1. As Figures 6 to 8 shown, the assembly directions of the first indication assembly 4 and the second indication assembly 4 are opposite, so as to avoid the indication marks in the pair of indication assemblies 4 simultaneously indicating the open state and the closed state.

[0055] As Figure 7 shown, the pair of main spring assemblies 2 are switched from the energy releasing state to the energy storing state, but during the energy storing process, the pair of driving assemblies 3 are not driven by the corresponding main spring assemblies 2. The pair of driving assemblies 3 can be tripped in the case that the dual power transfer switch 100 receives a switching command, and thus the pair of main spring assemblies 2 release energy and can drive the corresponding driving assemblies 3 to rotate, and then the pair of driving assemblies 3 drive the corresponding indication assemblies 4 to rotate. At a certain moment of switching, the pair of indication assemblies 4 can rotate to the position where the part between the open indication mark 4223 and the closed indication mark 4222 corresponds to the position of the corresponding indication hole 51, and thus neither the open indication mark 4223 nor the closed indication mark 4222 can be observed.

[0056] As Figure 8As shown, the pair of main spring assemblies 2 continue to release energy and return to the energy releasing state, and the first indicating assembly 4 continues to rotate to the position where the closed indication mark 4222 can be observed, indicating that the movable contact assembly 6 coupled to the first indicating assembly 4 is in the closed state, and thus the power supply S1 coupled to the movable contact assembly 6 is turned on. Correspondingly, the second indicating assembly 4 continues to rotate to the position where the open indication mark 4223 can be observed, indicating that the movable contact assembly 6 coupled to the second indicating assembly 4 is in the open state, and thus the power supply S2 coupled to the movable contact assembly 6 is not turned on. Thus, the double power supply transfer switch 100 completes the process of switching from the power supply S2 being turned on to the power supply S1 being turned on. Thus, the operator can observe the information that S1 is closed and S2 is open through the indication hole 51.

[0057] It should be noted that the power supply S1 can be one of the main power supply and the backup power supply, and the power supply S2 can be the other of the main power supply and the backup power supply. In addition, the pair of movable contact assemblies 6 according to the embodiments of the present disclosure each include a closed state and an open state, i.e., four states in total. However, the double power supply transfer switch 100 includes two states, including a state in which the power supply S1 is turned on and the power supply S2 is turned off, and a state in which the power supply S1 is turned off and the power supply S2 is turned on, and thus the indicating assembly 4 according to the embodiments of the present disclosure can indicate the two states of the double power supply transfer switch 100 and can indicate the states of the pair of movable contact assemblies 6 respectively.

[0058] In addition, Figures 6 to 8 The pair of main spring assemblies 2 in the double power supply transfer switch 100 rotate clockwise and switch from the energy releasing state to the energy storing state, and then return to the energy releasing state again, during which the two states of the double power supply transfer switch 100 can be indicated, and switching from the power supply S2 being turned on to the power supply S1 being turned on. Obviously, the process of the pair of main spring assemblies 2 rotating counterclockwise is similar to the process shown in Figure 6 and Figure 8 The process shown in the double power supply transfer switch 100 is similar, during which the two states of the double power supply transfer switch 100 can also be indicated, and switching from the power supply S1 being turned on to the power supply S2 being turned on, and the embodiments of the present disclosure will not be repeated.

[0059] The indicating assembly according to the embodiments of the present disclosure can be applied to various double power supply transfer switches to at least partially solve the above-mentioned problems. It should be understood that the indicating assembly according to the embodiments of the present disclosure can also be applied to other electrical components, and the embodiments of the present disclosure do not limit this.

[0060] Having described above several embodiments of the disclosure, any modifications and variations that fall within the scope of the described embodiments are also contemplated. It is also contemplated that the application covered by the claims extends to any alternative embodiment, adaptations, or variations of the various embodiments described above, and to any and all equivalents. The terms "comprises", "comprising", "comprised of" and "comprising" when used in this specification are taken to specify the presence of stated features, integers, steps or components but do not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.

Claims

1. A dual power transfer switch (100), characterized in that, The dual power transfer switch (100) comprises: a support (1); a pair of main spring assemblies (2) rotatably arranged on the support (1); a pair of drive assemblies (3) each coupled to and capable of being driven by a corresponding main spring assembly (2), each of the pair of drive assemblies (3) comprising an output shaft (31); and at least one indication assembly (4) rotatably arranged on the support (1) and comprising a transmission member (41) and an indication member (42), the transmission member (41) comprising a main body portion (411) and a connecting hole (412) arranged on the main body portion (411), the connecting hole (412) being arranged around the corresponding output shaft (31), the indication member (42) comprising a fitting portion (421) coupled to and capable of being driven by the main body portion (411) and an indication portion (422) comprising a closing indication mark (4222) and an opening indication mark (4223) arranged away from the fitting portion (421).

2. The dual power transfer switch (100) of claim 1, characterized in that The at least one indication assembly (4) comprises a pair of indication assemblies (4), the connecting hole (412) of each indication assembly (4) of the pair of indication assemblies (4) being arranged around the corresponding output shaft (31) of the pair of drive assemblies (3).

3. The dual power transfer switch (100) of claim 1, wherein, The indication member (42) comprises a rotating portion (423) between the fitting portion (421) and the indication portion (422), the rotating portion (423) comprising a rotating hole (4231), the support (1) comprises at least one rotating shaft (11), and the rotating hole (4231) is arranged around the corresponding rotating shaft (11).

4. The dual power transfer switch (100) of claim 3, characterized in that The indication portion (422) comprises an arc-shaped surface (4221) extending along a rotating direction of the indication member (42), and the closing indication mark (4222) and the opening indication mark (4223) are arranged on the arc-shaped surface (4221) at intervals.

5. The dual power transfer switch (100) of claim 1, wherein, The fitting portion (421) comprises a fitting groove (4211) facing away from the indication portion (422), the transmission member (41) comprises a transmission portion (413) arranged on the main body portion (411), the transmission portion (413) being located in the fitting groove (4211) and capable of cooperating with the fitting groove (4211).

6. The dual power transfer switch (100) of claim 5, characterized in that The transmission portion (413) is arranged on a side of the main body portion (411) facing the support (1); or The transmission portion (413) is arranged on a side of the main body portion (411) facing away from the support (1).

7. The dual power transfer switch (100) of claim 1, wherein, The support (1) further comprises at least one mounting shaft (12), the main body portion (411) further comprises a mounting hole (414), and the mounting hole (414) is arranged around the corresponding mounting shaft (12).

8. The dual power transfer switch (100) of claim 7, characterized in that The main body portion (411) is provided with a weight-reducing hole (415), and the weight-reducing hole (415) is staggered with the connecting hole (412) and the mounting hole (414).

9. The dual power transfer switch (100) of claim 1, wherein, The dual power transfer switch (100) further comprises a housing (5), the housing (5) comprises at least one indication hole (51), and the at least one indication hole (51) is used for presenting the closing indication mark (4222) and the opening indication mark (4223) of the corresponding indication part (422).

10. The dual power transfer switch (100) of claim 9, characterized in that The at least one indication hole (51) comprises a pair of indication holes (51).

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