A three-position dual power transfer switch

Abstract

The utility model discloses a three-position dual power conversion switch, comprising a conversion shaft arranged on a shell and two spring members arranged between the conversion shaft and the shell, two installation slide grooves connecting the two spring members are arranged on the shell, the two spring members respectively have first end feet slidably connected in the two installation slide grooves, and second end feet extending and connected to the conversion shaft, when the conversion shaft switches between a first position, a second position and a third position, the first end feet of the two spring members are driven to move and adjust positions in the two installation slide grooves respectively, and a force is applied to the conversion shaft to keep it in the first position, the second position or the third position through the two spring members, and the dual power conversion switch can disconnect the normal power supply and the standby power supply in the third position to achieve the purpose of dual separation, and the dual power conversion switch has a simple operating structure, low cost, reliable and in-place operation switching, and improved product performance.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a three-position dual-power supply conversion switch. Background Art

[0002] The dual power transfer switch is mainly used in emergency power supply systems to automatically switch the load circuit from one power source to another (backup) power source to ensure continuous and reliable operation of important loads. The purpose of the dual power automatic transfer switch is to have one main power source and one backup power source. When the main power source suddenly fails or the power goes out, the dual power switch will automatically switch to the backup power source to ensure that the equipment can still operate normally.

[0003] The existing dual power conversion switch is mainly a two-position dual power conversion switch, in which the operating mechanism is an important mechanism in the entire power conversion switch, and its function is to be used for the closing and opening operations of the switch, so as to operate the two-position dual power conversion switch to realize reliable switching between the closed position of the normal power supply and the closed position of the backup power supply, and the use of electrical equipment will not experience long-term power outages, thereby ensuring the safety of electrical equipment and the continuity of production. However, when the lines and equipment need to be maintained and overhauled, the personal safety of maintenance personnel must be guaranteed, and the dual power conversion switch is required to be in the double-off position. Obviously, the existing two-position dual power conversion switch cannot achieve the double-off position in which the normal power supply and the backup power supply are disconnected at the same time, and there are operational defects. Therefore, technical personnel in this field urgently need to design a power conversion switch with a simple structure, reliable operation switching, and a double-off position for simultaneously cutting off the normal power supply and the backup power supply. Utility Model Content

[0004] Therefore, the purpose of the utility model is to overcome the deficiencies in the prior art, thereby providing a power transfer switch with a simple structure, reliable operation and switching, and a dual-position for simultaneously cutting off the normal power supply and the standby power supply.

[0005] To achieve the above-mentioned object, the utility model provides a three-position dual power switch, comprising a housing, a contact mechanism and a driving structure, wherein the contact mechanism comprises a switching shaft, a common static contact and a spare static contact arranged on the housing, the switching shaft rotates under the drive of the driving structure, and has a first position for driving the moving contact to close with the common static contact, a second position for driving the moving contact to close with the spare static contact, and a third position for driving the moving contact to disconnect with the common static contact and the spare static contact respectively; two spring members located on both sides of the switching shaft are arranged between the switching shaft and the housing, two mounting slide grooves connecting the two spring members are arranged on the housing, and the two spring members respectively have a first end foot slidably connected in the two mounting slide grooves, and a second end foot extending and connected to the switching shaft;

[0006] When the conversion shaft switches between the first position, the second position and the third position, the first end feet of the two spring members are driven to move and adjust the positions in the two installation slots respectively, and a force is applied to the conversion shaft to maintain the first position, the second position or the third position through the two spring members.

[0007] As a preferred solution, the conversion shaft includes two connecting rods arranged at an angle, and connecting holes respectively arranged on the two connecting rods, and the second end legs of the two spring members are respectively hooked in the connecting holes of the two connecting rods.

[0008] As a preferred solution, the two spring members are divided into two torsion spring structures; or, the two spring members are divided into two compression spring structures.

[0009] As a preferred embodiment, the shell includes a mounting side plate installed in cooperation with the driving structure, the conversion shaft passes through the mounting side plate and is connected to the driving structure, two mounting bosses are arranged on the mounting side plate, and two mounting grooves are symmetrically arranged on the two mounting bosses in an inclined state with respect to the axis of the conversion shaft.

[0010] As a preferred solution, two detection switches are provided on the mounting side plate and are respectively located on the movement paths of the two connecting rods. When the conversion shaft reaches the first position, it drives one of the connecting rods to trigger one of the detection switches to turn on. When the conversion shaft reaches the second position, it drives the other connecting rod to trigger the other detection switch to turn on. When the conversion shaft reaches the third position, it drives the two connecting rods away from the two detection switches respectively.

[0011] As a preferred solution, one end of the conversion shaft passes through the mounting side plate and is connected to the driving structure through a gear structure, and two connecting rods are arranged on a side wall of one end of the conversion shaft.

[0012] As a preferred embodiment, the driving structure includes a mechanism bracket installed and fixed on the mounting side plate, and a accommodating space suitable for accommodating two spring members is formed between the mechanism bracket and the mounting side plate. The gear structure includes a gear shaft driven by the driving structure to rotate and arranged between the mechanism bracket and the mounting side plate, a driving gear arranged on the gear shaft, and a driven gear arranged at one end of the conversion shaft and meshing with the driving gear.

[0013] As a preferred embodiment, the driving structure includes two electromagnet devices relatively arranged on a mechanism bracket, the two electromagnet devices have two push rods that perform linear reciprocating motion, and a linkage sleeve is linked between the two push rods, and a guide through hole is provided on the linkage sleeve. The movement direction of the two push rods is perpendicular to the axial direction of the gear shaft, and the gear shaft is provided with a push rod extending along its radial direction and penetrating into the guide through hole.

[0014] As a preferred solution, the driving structure includes a motor device arranged on a mechanism bracket, and the output shaft of the motor device is arranged in linkage with the gear shaft.

[0015] As a preferred solution, it also includes a handle rod fixedly connected to the push rod, and the handle rod passes through the linkage sleeve and extends out of the cover shell.

[0016] Compared with the prior art, the technical solution of the utility model has the following advantages:

[0017] 1. In the dual power conversion switch provided by the utility model, according to the conversion shaft, during the rotation process, it has a first position and a second position for realizing the switching and closing of the normal power supply and the backup power supply, and also has a third position for realizing the simultaneous disconnection of the normal power supply and the backup power supply, the third position being the double-split position. The specific implementation method is to respectively connect the first end feet of the two spring members to the two mounting slots of the shell, and respectively connect the second end feet of the two spring members to the conversion shaft. When the conversion shaft moves to the third position, it will drive the first end feet of the two spring members to move against the lower ends of the two mounting slots, so that a balanced state of keeping the relative position still is formed between the two spring members and the conversion shaft, that is, the two spring members apply a force to the conversion shaft to maintain the third position, so that the dual power conversion switch can achieve the dual-split purpose of simultaneously disconnecting the normal power supply and the backup power supply. The dual power conversion switch designed in this way has a simple structure for realizing the switching of the first, second and third positions, low cost, and reliable and in-place operation switching, which can not only ensure the safety of electrical equipment and the continuity of production, but also ensure the safety of maintenance and repair by switching the dual power conversion switch to the double-split position when the line and equipment need maintenance and repair, thereby improving the product performance.

[0018] 2. In the dual power conversion switch provided by the utility model, two detection switches located on the movement paths of the two connecting rods are arranged on the mounting side plate. When the conversion shaft reaches the first position, it drives one of the connecting rods to trigger one of the detection switches to turn on, which is used to detect that the dual power conversion switch is in the normal power closing state; and when the conversion shaft reaches the second position, it drives the other connecting rod to trigger the other detection switch to turn on, which is used to detect that the dual power conversion switch is in the standby power closing state; in addition, when the conversion shaft reaches the third position, it drives the two connecting rods away from the two detection switches respectively, that is, it is detected that the dual power conversion switch is in the dual-split state. This structural setting can realize the working status detection function of the dual power conversion switch through the cooperation of the two detection switches and the two connecting rods of the conversion shaft, so that the user can clearly know the working status of the switch and the operation is safer.

[0019] 3. In the dual power conversion switch provided by the utility model, the driving structure includes two electromagnet devices relatively arranged on the mechanism bracket, and a linkage sleeve is arranged between the two push rods of the two electromagnet devices, and the gear shaft is inserted into the linkage sleeve through the push rod to form a transmission match. The moving stroke of the push rod can be controlled by the electromagnet device, and then the gear shaft is driven to rotate through the cooperation of the linkage sleeve and the push rod, so that the motion and force are transmitted between the gear shaft and the conversion shaft through the gear transmission method, so that the linear motion of the push rod is converted into the rotational motion of the conversion shaft, so as to drive the conversion shaft to realize rotation switching between the first position, the second position and the third position, and the transmission cooperation is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the drawings required for use in the specific implementation or the description of the prior art will be briefly introduced below.

[0021] Figure 1 It is a structural schematic diagram of a dual power conversion switch of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the dual power conversion switch of the utility model behind the hidden cover;

[0023] Figure 3 It is a structural schematic diagram of the conversion shaft of the utility model in the first position;

[0024] Figure 4 It is a structural schematic diagram of the conversion shaft of the utility model in the second position;

[0025] Figure 5 It is a structural schematic diagram of the conversion shaft of the utility model in the third position;

[0026] Figure 6 for Figure 5 The three-dimensional structural schematic diagram of the dual power conversion switch shown;

[0027] Figure 7 It is a structural schematic diagram of the driving structure of the utility model;

[0028] Figure 8 It is a structural schematic diagram of another embodiment of the spring element of the utility model.

[0029] Explanation of the reference numerals: 1. Shell; 11. Mounting side plate; 12. Mounting boss; 2. Conversion shaft; 21. Connecting rod; 3. Spring member; 31. First end foot; 32. Second end foot; 4. Mounting slide; 5. Driving structure; 50. Mechanism bracket; 51. Electromagnet device; 52. Push rod; 53. Linkage sleeve; 6. Gear shaft; 61. Driving gear; 62. Driven gear; 7. Detection switch; 8. Push rod; 81. Handle rod; 9. Cover. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Example

[0035] The present embodiment is described in detail below with reference to the accompanying drawings:

[0036] This embodiment provides Figure 1-Figure 8 A three-position dual power switch is shown, comprising a switching shaft 2, a common static contact, a spare static contact, and a moving contact arranged on the switching shaft 2, the switching shaft 2 being driven by a driving structure 5 to rotate, and having a first position for driving the moving contact to close with the common static contact, a second position for driving the moving contact to close with the spare static contact, and a third position for driving the moving contact to disconnect with the common static contact and the spare static contact respectively; wherein, when the moving contact is closed with the common static contact, the common power supply is connected, and when the moving contact is closed with the spare static contact, the spare power supply is connected;

[0037] Two spring members 3 are disposed between the conversion shaft 2 and the housing 1 and are located on both sides of the conversion shaft 2. Two mounting slots 4 are disposed on the housing 1 to connect the two spring members 3. The mounting slots 4 have an upper end close to the conversion shaft 2 and a lower end away from the conversion shaft 2. The two spring members respectively have a first end foot 31 slidably connected to the two mounting slots 4, and a second end foot 32 extending and connected to the conversion shaft 2.

[0038] When the conversion shaft 2 switches between the first position, the second position and the third position, the first end feet 31 of the two spring members 3 are driven to move and adjust the positions in the two mounting slots 4 respectively, and the two spring members 3 exert a force on the conversion shaft 2 to maintain the conversion shaft 2 in the first position, the second position or the third position; the specific operation process of the conversion shaft 2 is as follows:

[0039] refer to Figure 3 , when the conversion shaft 2 is in the first position, the first end leg 31 of the left spring member 3 is driven to move against the upper end of the left installation slot 4, and the first end leg 31 of the right spring member 3 is driven to move against the lower end of the right installation slot 4, so that the two spring members 3 exert a force on the conversion shaft 2 to keep it in the first position. At this time, the dual power conversion switch is in the common power supply closing state, that is, connected to the common power supply;

[0040] refer to Figure 4 , when the conversion shaft 2 is in the second position, the first end leg 31 of the left spring member 3 is driven to move against the lower end of the left installation slot 4, and the first end leg 31 of the right spring member 3 is driven to move against the upper end of the right installation slot 4, so that the two spring members 3 exert a force on the conversion shaft 2 to keep it in the second position. At this time, the dual power conversion switch is in the standby power closing state, that is, the standby power is turned on;

[0041] refer to Figure 5 When the conversion shaft 2 is in the third position, the first end feet 31 of the two spring members 3 are driven to move against the lower ends of the two mounting slots 4, so that the two spring members 3 exert a force on the conversion shaft 2 to maintain it in the first position, the second position or the third position. At this time, the dual power conversion switch is in a dual-split state in which the normal power supply and the backup power supply are disconnected at the same time.

[0042] The above implementation is the core solution of this embodiment. According to the first position and the second position for realizing the switching of the normal power supply and the backup power supply during the rotation process of the conversion shaft 2, it also has a third position for realizing the simultaneous disconnection of the normal power supply and the backup power supply. The third position is the double-split position of the dual power conversion switch. Specifically, the first end legs 31 of the two spring members 3 are respectively connected to the two mounting slots 4 of the housing 1, and the second end legs 32 of the two are respectively connected to the conversion shaft 2. When the conversion shaft 2 moves to the third position, the first end legs 31 of the two spring members 3 will be driven to move against the lower ends of the two mounting slots 4. , so that the two spring members 3 and the conversion shaft 2 form a state of equilibrium in which the relative position is static, that is, the two spring members 3 exert a force on the conversion shaft 2 to keep it in the third position, thereby achieving the purpose of the dual power conversion switch disconnecting the normal power supply and the backup power supply at the same time. This dual power conversion switch has a simple structure, low cost, and reliable operation to achieve switching between the first, second, and third positions. It can not only ensure the safety of electrical equipment and the continuity of production, but also ensure the safety of maintenance and repair by switching the dual power conversion switch to the double-split position when the line and equipment need maintenance and repair, thereby improving the product performance.

[0043] As a preferred embodiment, combined with Figure 3-Figure 6 As shown, the conversion shaft 2 includes two connecting rods 21 set at an angle, and connecting holes respectively set on the two connecting rods 21. The second end legs 32 of the two spring members 3 are respectively hooked in the connecting holes of the two connecting rods 21. Specifically, the two spring members are preferably two torsion spring structures, which can be divided into a left torsion spring and a right torsion spring. The left torsion spring is connected to one of the mounting slots 4 and the connecting rod 21, and the right torsion spring is connected to the other mounting slot 4 and the connecting rod 21. The two spring members 3 are subjected to force and produce elastic deformation during the rotation of the conversion shaft 2. In this process, the first end leg 31 is moved along the mounting slot 4 to adjust the position of the spring member to adapt to the position of the conversion shaft 2 after rotation, so that the conversion shaft can keep the position locked by the elastic force provided by the two spring members 3 when reaching different positions, thereby realizing the three-position switching function of the dual power conversion switch.

[0044] As an alternative to the above spring member, refer to Figure 8 The two spring members 3 can also be selected as two compression spring structures, one end of which is formed with a first end foot connected to the gear shift installation, and the other end is formed with a second end foot connected to the connecting rod, so that when the conversion shaft switches between the first position, the second position and the third position, it is locked in a certain position by cooperating with the two compression spring structures, thereby realizing the three-position switching function of the dual power conversion switch.

[0045] The housing 1 includes a mounting side plate 11 mounted in cooperation with the drive structure 5, the conversion shaft 2 passes through the mounting side plate 11 and is connected to the drive structure 5, two mounting bosses 12 are arranged on the mounting side plate 11, two mounting slide grooves 4 are symmetrically arranged on the two mounting bosses 12 in an inclined shape with respect to the axis of the conversion shaft 2, and two detection switches 7 are arranged on the mounting side plate 11, which are respectively located on the movement paths of the two connecting rods 21. When the conversion shaft 2 reaches the first position, it drives one of the connecting rods 21 to trigger one of the detection switches 7 to turn on, thereby detecting that the dual power conversion switch is in the common power on state. ; When the conversion shaft 2 reaches the second position, it drives the other connecting rod 21 to trigger the other detection switch 7 to open, thereby detecting that the dual power conversion switch is in the standby power closing state; when the conversion shaft 2 reaches the third position, it drives the two connecting rods 21 away from the two detection switches 7 respectively, that is, it is detected that the dual power conversion switch is in the dual-split state. The detection switch can preferably be a micro switch. This structural setting can realize the working status detection function of the dual power conversion switch through the cooperation of the two detection switches 7 and the two connecting rods of the conversion shaft 2, so that the user can clearly know the working status of the switch and the operation is safer.

[0046] Combine the following Figure 3-Figure 7 The specific configuration of the conversion shaft and the driving structure is described in detail:

[0047] One end of the conversion shaft 2 passes through the mounting side plate 11 and is connected to the driving structure 5 through a gear structure. Two connecting rods 21 are arranged on the side wall of one end of the conversion shaft 2. It is further preferably arranged that the driving structure 5 includes a mechanism bracket 50 installed and fixed on the mounting side plate 11, and a accommodating space suitable for accommodating two spring members 3 is formed between the mechanism bracket 50 and the mounting side plate 11. The gear structure includes a gear shaft 6 driven by the driving structure 5 to rotate and arranged between the mechanism bracket 50 and the mounting side plate 11, and a driving gear 61 arranged on the gear shaft 6, and a driven gear 62 arranged on the coupling part and meshing with the driving gear 61. With this structural arrangement, the driving structure 5 can select an electromagnet drive or a motor drive mode. When the gear shaft 6 rotates under the drive of the driving structure, the driving gear 61 and the driven gear 62 are used to drive the conversion shaft 2 to rotate. The conversion shaft 2 is maintained in the first position, the second position or the third position by cooperating with the two spring members 3, thereby realizing the three-position switching function of the dual power conversion switch.

[0048] As a preferred embodiment, the driving structure 5 includes two electromagnet devices 51 relatively arranged on a mechanism bracket 50, the two electromagnet devices 51 have two push rods 52 that perform linear reciprocating motion, and a linkage sleeve 53 is linked between the two push rods 52, and a guide through hole is provided on the linkage sleeve 53, which extends a set distance along the length direction of the linkage sleeve 53. The movement direction of the two push rods 52 is perpendicular to the axial direction of the gear shaft 6, and the gear shaft 6 is provided with a push rod 8 that extends radially and penetrates into the guide through hole. According to the electromagnet device mainly composed of a coil and an iron core, the push rod It is connected to the iron core. It can be seen from the above structure that the driving structure 5 preferably adopts an electromagnet driving method. The gear shaft 6 is inserted into the linkage sleeve 53 through the push rod 8 to form a transmission match. The moving stroke of the push rod 52 can be controlled by the electromagnet device 51, and then the gear shaft 6 is driven to rotate a certain angle through the cooperation of the linkage sleeve 53 and the push rod 8, so that the motion and force are transmitted between the gear shaft 6 and the conversion shaft 2 through the gear transmission method, thereby converting the linear motion of the push rod 52 into the rotational motion of the conversion shaft 2, thereby driving the conversion shaft to realize rotation switching between the first position, the second position and the third position, and the transmission cooperation is reliable.

[0049] In order to realize the manual operation of the dual power conversion switch, combined with Figure 1 , Figure 2 and Figure 7 As shown, this dual power conversion switch also includes a handle rod 81 fixedly connected to the push rod 8, and the handle rod 81 is inserted into the guide through hole and fixed with one end of the push rod. A cover 9 for covering the drive structure 5 is provided on the mechanism bracket 50. A movement hole for the handle rod 81 to extend out is opened on the top of the cover 9. The handle rod 81 extends out of the cover through the linkage sleeve. The handle rod 81 is linked to the push rod 8 to move in the guide through hole of the linkage sleeve 53, thereby driving the conversion shaft 2 to realize the rotation operation in the manual mode.

[0050] As an alternative to the above-mentioned drive structure, the drive structure 5 can also be driven by a motor. Specifically, the drive structure 5 includes a motor device arranged on a mechanism bracket 50, and the output shaft of the motor device is arranged in linkage with the gear shaft 6. With this structural arrangement, when the motor device drives the gear shaft 6 to rotate, the conversion shaft 2 is driven to rotate synchronously through a gear transmission method. The conversion shaft 2 is maintained in the first position, the second position, or the third position by cooperating with the two spring members 3. In this way, the dual power conversion switch can also be switched between three positions. Those skilled in the art can make a choice of the setting mode of the drive structure according to the above description, and other equivalent embodiments will not be described one by one here.

[0051] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A three-position dual power switch, comprising a housing (1), a contact mechanism and a drive structure (5), wherein the contact mechanism comprises a switching shaft (2) arranged on the housing (1), a common static contact and a spare static contact, wherein the switching shaft (2) is driven by the drive structure (5) to rotate and has a first position in which a moving contact is driven to close with the common static contact, a second position in which the moving contact is driven to close with the spare static contact, and a third position in which the moving contact is driven to disconnect with the common static contact and the spare static contact respectively; characterized in that: Two spring members (3) are arranged between the conversion shaft (2) and the housing (1) and are located on both sides of the conversion shaft (2); two mounting slots (4) connecting the two spring members (3) are arranged on the housing (1); the two spring members respectively have first end feet (31) slidably connected in the two mounting slots (4), and second end feet (32) extending and connected to the conversion shaft (2); when the conversion shaft (2) switches between the first position, the second position and the third position, the first end feet (31) of the two spring members (3) are driven to move and adjust positions in the two mounting slots (4), and a force is applied to the conversion shaft (2) to maintain the conversion shaft (2) in the first position, the second position or the third position through the two spring members (3).

2. The three-position dual power transfer switch according to claim 1, characterized in that: The conversion shaft (2) comprises two connecting rods (21) arranged at an angle, and connecting holes respectively arranged on the two connecting rods (21); the second end legs (32) of the two spring members (3) are respectively hooked in the connecting holes of the two connecting rods (21).

3. The three-position dual power switch according to claim 2, characterized in that: The two spring members (3) are two torsion spring structures; or, the two spring members (3) are two compression spring structures.

4. The three-position dual power switch according to claim 3, characterized in that: The housing (1) comprises a mounting side plate (11) mounted in cooperation with the driving structure (5); the conversion shaft (2) passes through the mounting side plate (11) and is connected to the driving structure (5); two mounting bosses (12) are arranged on the mounting side plate (11); and two mounting grooves (4) are arranged symmetrically on the two mounting bosses (12) in an inclined shape with respect to the axis of the conversion shaft (2).

5. The three-position dual power switch according to claim 2, characterized in that: Two detection switches (7) are arranged on the mounting side plate (11) of the shell and are respectively located on the movement paths of the two connecting rods (21); when the conversion shaft (2) reaches the first position, it drives one of the connecting rods (21) to trigger one of the detection switches (7) to turn on; when the conversion shaft (2) reaches the second position, it drives the other connecting rod (21) to trigger the other detection switch (7) to turn on; when the conversion shaft (2) reaches the third position, it drives the two connecting rods (21) to move away from the two detection switches (7) respectively.

6. The three-position dual power switch according to any one of claims 1 to 5, characterized in that: One end of the conversion shaft (2) passes through the mounting side plate (11) and is connected to the driving structure (5) via a gear structure, and two connecting rods (21) are arranged on a side wall at one end of the conversion shaft (2).

7. The three-position dual power switch according to claim 6, characterized in that: The driving structure (5) comprises a mechanism bracket (50) fixedly mounted on the mounting side plate (11); a receiving space suitable for accommodating two spring members (3) is formed between the mechanism bracket (50) and the mounting side plate (11); the gear structure comprises a gear shaft (6) driven by the driving structure (5) to rotate between the mechanism bracket (50) and the mounting side plate (11); a driving gear (61) arranged on the gear shaft (6); and a driven gear (62) arranged at one end of the conversion shaft (2) and meshing with the driving gear (61).

8. The three-position dual power switch according to claim 7, characterized in that: The driving structure (5) comprises two electromagnet devices (51) arranged relatively on a mechanism bracket (50), the two electromagnet devices (51) having two push rods (52) performing linear reciprocating motion, and a linkage sleeve (53) being arranged between the two push rods (52), the linkage sleeve (53) being provided with a guide through hole, the movement direction of the two push rods (52) being perpendicular to the axial direction of the gear shaft (6), and the gear shaft (6) being provided with a push rod (8) extending along its radial direction and penetrating into the guide through hole.

9. The three-position dual power switch according to claim 7, characterized in that: The driving structure (5) comprises a motor device arranged on a mechanism bracket (50), and the output shaft of the motor device is arranged in linkage with the gear shaft (6).

10. The three-position dual power transfer switch according to claim 8, characterized in that: It also includes a handle rod (81) fixedly connected to the push rod (8), and the handle rod (81) passes through the linkage sleeve (53) and then extends out of the housing.

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